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CN111910124A - Anti-stretch-fold component in wrist strap and preparation method thereof - Google Patents

Anti-stretch-fold component in wrist strap and preparation method thereof Download PDF

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Publication number
CN111910124A
CN111910124A CN202010763610.2A CN202010763610A CN111910124A CN 111910124 A CN111910124 A CN 111910124A CN 202010763610 A CN202010763610 A CN 202010763610A CN 111910124 A CN111910124 A CN 111910124A
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stretch
graphite
raw materials
molten steel
component
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李丹
钟颖锋
钟裕山
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Shenzhen Runan Science And Technology Development Co ltd
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Shenzhen Runan Science And Technology Development Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/088—Iron or steel solutions containing organic acids

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  • Chemical Kinetics & Catalysis (AREA)
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Abstract

An anti-stretch-fold component in a wrist strap and a preparation method thereof, the method comprises the following steps: preparing raw materials with reasonable components and compositions; putting graphite with 80% mass parts of pure iron and graphite and silicon, chromium, vanadium and manganese in the prepared raw materials into a smelting furnace in sequence to be smelted into molten steel; casting the obtained molten steel into an ingot; quenching and tempering the obtained cast ingot in sequence to obtain a forged body for later use; drawing and cutting the obtained forged body to obtain a spring steel wire; the obtained spring wire is rolled into a spring-like stretch-proof member. According to the technical scheme provided by the invention, on one hand, the raw materials are carefully selected and reasonably arranged, so that the raw materials are selected for manufacturing the high-strength tensile folding part; on the other hand, in the preparation stage, through the improvement of processes such as melting, quenching and tempering, the final tensile folding component not only has high strength, but also has stronger toughness, and can meet the requirement of the community correction wrist strap on tensile folding resistance.

Description

Anti-stretch-fold component in wrist strap and preparation method thereof
Technical Field
The invention relates to the field of metal part manufacturing, in particular to an anti-stretch-break component in a wrist strap and a preparation method thereof.
Background
Community correction is usually performed by using a positioning terminal with a communication function, such as a wrist strap, to bind with a person to be corrected. For the wrist band with the communication function, as long as the wrist band is worn on the person to be corrected at all times, the position of the wrist band is the position of the person to be corrected.
The wrist strap is internally provided with two anti-tensile and anti-folding components, such as steel wire ropes and the like, and the components are embedded into the long and short side wrist straps of the wrist strap and are integrated with the wrist strap, so that the tensile and anti-folding strength of the wrist strap can be enhanced. Regarding the anti-tensile folding part, the existing manufacturing materials and methods are not much different from the common steel wire rope, and the anti-tensile folding part is made of steel with certain ductility.
However, the above conventional anti-stretch-fold component and the manufacturing method thereof have problems in material selection and have poor quality due to the lagged manufacturing process, for example, the strength of the anti-stretch-fold component cannot meet the requirement of the wrist strap for stretch-fold resistance.
Disclosure of Invention
The invention provides an anti-stretch-break component in a wrist strap and a preparation method thereof, which are used for preparing a high-strength anti-stretch-break component by using reasonable raw materials and meeting the requirement of the wrist strap on anti-stretch-break.
Therefore, according to a first aspect, the embodiment of the invention discloses an anti-stretch-fold component in a wrist strap, which is prepared from the following raw materials in percentage by weight:
carbon: 0.55-0.60%, silicon: 1.30-1.55%, manganese: 0.55-0.76%, phosphorus: 0-0.01%, nickel: 0.2 to 0.45%, chromium: 0.55-0.76%, copper: 0-0.20%, vanadium: 0.17% -0.23%, titanium: 0.026-0.045%, and the balance of pure iron and inevitable impurities.
Optionally, the inevitable impurities include non-metallic inclusions: sulfides, alumina, silicates and/or spherical oxides.
Optionally, the vanadium and titanium are present in the form of carbides or nitrides.
According to a second aspect, the embodiment of the invention discloses a preparation method of an anti-stretch-fold component in a wrist strap, which comprises the following processing steps:
step S101: preparing raw materials of chemical components required by smelting according to the following weight percentages: carbon: 0.55-0.60%, silicon: 1.30-1.55%, manganese: 0.55-0.76%, phosphorus: 0-0.01%, nickel: 0.20 to 0.45%, chromium: 0.55-0.76%, copper: 0-0.20%, vanadium: 0.17% -0.23%, titanium: 0.026-0.045%, the rest is pure iron and inevitable impurities;
step S102: putting graphite with 80% mass parts of pure iron and graphite and silicon, chromium, vanadium and manganese in the prepared raw materials into a smelting furnace in sequence to be smelted into molten steel;
step S103: casting the molten steel obtained in the step S102 into an ingot;
step S104: quenching and tempering the cast ingot obtained in the step S103 in sequence to obtain a forged body for later use;
step S105: drawing and cutting the forged body obtained in the step S104 to obtain a spring steel wire;
step S106: the spring wire obtained in step S105 is wound into a spring-like stretch-proof member.
Optionally, the smelting of the graphite with pure iron and graphite accounting for 80% by mass and the silicon, chromium, vanadium and manganese in the prepared raw materials into molten steel in a smelting furnace sequentially comprises:
putting graphite accounting for 80% of the pure iron and graphite in parts by mass into the smelting furnace, and performing first-time air content adjustment on the smelting furnace and then heating for smelting;
and after the pure iron and the graphite are completely melted, adding the silicon and the chromium into the smelting furnace, and smelting after adjusting the air content of the smelting furnace for the second time to obtain the molten steel.
Optionally, controlling the alkalinity of the slag in the furnace to be 3.1-3.8, controlling the content of iron oxide in the slag to be more than or equal to 16 wt%, controlling the content of phosphorus in the molten steel to be less than or equal to 0.006 wt%, and adding a deoxidizer with lime and/or fluorite as a component into the molten steel.
Optionally, the quenching temperature of the quenching process is 870 ℃, the quenching time is 25-35 minutes, the tempering temperature of the tempering process is 350 ℃, and the tempering time is 110-135 minutes.
Optionally, when the second air content adjustment is made to the furnace, the method further comprises:
inert gas is blown into the furnace for a short time at a low pressure.
Optionally, after step S105 or/and step S106, the method further includes:
and (3) derusting the spring steel wire or the spring-shaped tensile folded part by using a derusting agent.
Optionally, the rust remover comprises the following raw materials in parts by weight: 20-25% of dilute sulfuric acid, 13-21% of phosphoric acid, 12-15% of sodium chloride, 8% of sodium carbonate, 7% of ferrous sulfate, 6% of sodium benzoate, 4% of cyclopropane acid, 3% of triethanolamine, 6% of petroleum sulfonate and 9% of metal ion complexing agent.
Compared with the prior art that the tensile-bending component in the wristband is not enough in strength and the like due to unreasonable selection of raw materials and backward preparation process, the technical scheme provided by the invention has the advantages that on one hand, carbon, silicon, manganese, chromium and the like are carefully selected as the raw materials of the tensile-bending component, and the components of the elements are reasonably configured, so that the connection of selecting the raw materials is improved for manufacturing the high-strength tensile-bending component; on the other hand, in the preparation stage, through the improvement of processes such as melting, quenching and tempering, molten steel is finally poured into a cast ingot with higher strength, so that the finally rolled spring-shaped tensile bending part not only has high strength, but also has stronger toughness, and can meet the requirement of the community correction wrist strap on resisting tension bending.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flow chart of a method for manufacturing an anti-stretch-break component in a wrist strap according to an embodiment of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In order to overcome the defects that the tensile and folding component in the wrist strap is not enough in strength and the like caused by unreasonable selection of raw materials and backward preparation process when the tensile and folding component in the wrist strap is prepared in the prior art, the embodiment of the invention provides the tensile and folding component in the wrist strap, and the tensile and folding component is prepared from the following chemical components in percentage by weight:
carbon: 0.55-0.60%, silicon: 1.30-1.55%, manganese: 0.55-0.76%, phosphorus: 0-0.01%, nickel: 0.2 to 0.45%, chromium: 0.55-0.76%, copper: 0-0.20%, vanadium: 0.17% -0.23%, titanium: 0.026-0.045%, and the balance of pure iron and inevitable impurities. As an example, the anti-stretch-breaking component can be prepared from raw materials containing the following chemical components in percentage by weight: carbon: 0.55% or 0.60%, silicon: 1.30%, 1.4% or 1.55%, manganese: 0.55%, 0.65% or 0.76%, phosphorus: 0%, 0.005% or 0.01%, nickel: 0.20%, 0.35% or 0.45%, chromium: 0.55%, 0.65% or 0.76%, copper: 0%, 0.1% or 0.20%, vanadium: 0.17%, 0.20% or 0.23%, titanium: 0.026%, 0.035% or 0.045%, the rest being pure iron and inevitable impurities.
The applicant selects the chemical components of the raw materials and the corresponding weight percentages thereof for the following reasons:
in the embodiment of the invention, the weight percentage of carbon is 0.55-0.60%, mainly considering that carbon is the most main basic element in steel, and in order to ensure high strength of steel, the carbon content cannot be too low or too high, because the carbon content is high, the toughness of steel is poor, and the hydrogen embrittlement resistance of steel is affected. The appropriate reduction of the carbon content makes the quenched structure of the steel contain more lath martensite, which can improve the toughness of the steel in a high-strength state, and is also beneficial to inhibiting the occurrence of hydrogen embrittlement and improving the corrosion and fatigue resistance of the steel.
In the embodiment of the invention, the weight percentage of silicon is 1.30-1.55%, mainly considering that silicon has strong solid solution strengthening effect in steel and is an alloy element which has the largest influence on the anti-elastic-sag performance of the anti-stretch-break component, but the plasticity and toughness of the steel can be reduced due to excessively high silicon content, and the anti-fatigue performance of the steel is influenced due to the fact that the silicon increases the activity of carbon to promote the decarburization and graphitization of the steel, so that the weight percentage of the silicon is preferably controlled to be 1.30-1.55%.
In the embodiment of the invention, the weight percentage of nickel is 0.20-0.45%, mainly considering that nickel can improve the hardenability of steel, improve the anti-elastic property of steel and ensure the toughness under ultrahigh strength, and nickel is a good element for improving the corrosion resistance of steel, and can inhibit the generation of corrosion pits and the expansion of the depth of the corrosion pits, thereby improving the corrosion resistance and fatigue resistance of high-strength steel, therefore, the addition of nickel is beneficial and less harmful, but the price of nickel is high, and considering the economy, the weight percentage is controlled to be 0.20-0.45% rather.
In the embodiment of the invention, the weight percentage of manganese is 0.55-0.76%, mainly considering that manganese can improve the hardenability of steel and can also play a role in solid solution strengthening. Manganese is an effective element for deoxidation and sulphur removal in the smelting process of steel, the manganese content is too low to play the role, but manganese and phosphorus have strong tendency of grain boundary co-segregation, the temper brittleness is promoted, and the toughness of the steel is reduced, so that the weight percentage of manganese is controlled to be 0.55-0.76% preferably.
In the embodiment of the invention, the weight percentage of the chromium is 0.55-0.76%, the chromium is mainly considered to effectively improve the hardenability and the tempering resistance of the steel, is also an element for solid solution strengthening, can reduce the activity of carbon, inhibits the decarburization and the graphitization tendency of the steel during high-temperature heating, and is favorable for resisting fatigue. Meanwhile, chromium also has corrosion resistance, but the elasticity-reducing performance and toughness are not good due to the excessively high content of chromium, so that the weight percentage of the chromium is controlled to be 0.55-0.76% rather.
In the embodiment of the present invention, the weight percentage of copper is 0 to 0.20%, and the upper limit is 0.20% mainly considering that copper is also an element which improves the corrosion resistance of the steel material itself, and it promotes the rust generated in the atmosphere of the steel to have a protective property like nickel, and inhibits the intrusion of the generated hydrogen into the steel to improve the hydrogen embrittlement resistance of the steel in a corrosive environment, and copper is preferably 0.10% or more, and an excessive content thereof lowers the workability.
In the embodiment of the invention, the weight percentage of vanadium is 0.17-0.23%, mainly considering that vanadium is the most common microalloying element in steel, vanadium is a strong carbide forming element, fine and dispersed vanadium carbide in steel can prevent austenite grains from growing up during high-temperature heating and plays a role in refining grains, while the vanadium carbide in a heating part at a high temperature of about 900 ℃ can be dissolved, the precipitation of the vanadium carbide can play a role in precipitation hardening under certain conditions so as to improve the strength of the steel and also can simultaneously improve the strength, toughness and fatigue performance of the steel, but the vanadium resource is rare so that the cost is high, therefore, the steel adopts vanadium and titanium which are added simultaneously and properly reduces the content of the vanadium, and the weight percentage of the vanadium is controlled to be 0.17-0.23%.
In the embodiment of the invention, the weight percentage of titanium is 0.17-0.23%, mainly considering that titanium is also a strong carbide forming element and has the function of fixing nickel in steel. Because the existence of the titanium carbide and the titanium nitride can also prevent the growth of austenite grains to play a role of grain refinement, and the dispersed and precipitated titanium carbide and the titanium nitride are the hydrogen traps with the highest trap energy in the steel, the diffusion of hydrogen can be inhibited, so that the delayed fracture resistance of the steel is improved. The above effect cannot be achieved when the titanium content is less than 0.02%, but the toughness of the steel is deteriorated due to the tendency of coarse titanium nickel, and therefore, the weight percentage of the titanium is controlled to 0.026 to 0.045%.
The above inevitable impurities include non-metallic inclusions: the grades of the sulfide, the alumina, the silicate and/or the spherical oxide are 0 grade of coarse sulfide series, 1 grade of fine sulfide series, 0 grade of coarse alumina series, 1 grade of fine alumina series, 0 grade of coarse silicate series, 0 grade of fine silicate series, 0.5 grade of coarse spherical oxide series and 0.5 grade of fine spherical oxide series.
In the above embodiments of the present invention, vanadium and titanium are present in the form of carbide or nitride.
Referring to fig. 1, a flowchart of a method for manufacturing an anti-stretch-break component in a wristband according to an embodiment of the present invention is shown, where the method for manufacturing an anti-stretch-break component in a wristband includes steps S101 to S106, and the following is described in detail:
step S101: preparing raw materials of chemical components required by smelting according to the following weight percentages: carbon: 0.55-0.60%, silicon: 1.30-1.55%, manganese: 0.55-0.76%, phosphorus: 0-0.01%, nickel: 0.2 to 0.45%, chromium: 0.55-0.76%, copper: 0-0.20%, vanadium: 0.17% -0.23%, titanium: 0.026-0.045%, and the balance of pure iron and inevitable impurities.
As mentioned above, the anti-bending part can also be prepared from the following chemical components in percentage by weight: carbon: 0.55% or 0.60%, silicon: 1.30%, 1.4% or 1.55%, manganese: 0.55%, 0.65% or 0.76%, phosphorus: 0%, 0.005% or 0.01%, nickel: 0.20%, 0.35% or 0.45%, chromium: 0.55%, 0.65% or 0.76%, copper: 0%, 0.1% or 0.20%, vanadium: 0.17%, 0.20% or 0.23%, titanium: 0.026%, 0.035% or 0.045%, the rest being pure iron and inevitable impurities.
The chemical components and weight percentages of the above raw materials are explained in the foregoing examples, and are not described herein.
Step S102: graphite with 80% of pure iron and graphite in parts by mass and silicon, chromium, vanadium and manganese in the prepared raw materials are sequentially put into a smelting furnace to be smelted into molten steel.
As an embodiment of the present invention, the smelting of graphite, in which pure iron and graphite occupy 80% by mass, and silicon, chromium, vanadium, and manganese in the prepared raw materials are successively put into a furnace to be molten steel may be achieved by the following steps S1021 and S1022:
step S1021: putting graphite with 80% of pure iron and graphite in parts by mass into a smelting furnace, adjusting the air content of the smelting furnace for the first time, and then heating for smelting.
Specifically, the implementation procedure of step S1021 is: placing graphite with 80% mass of pure iron and graphite in a smelting furnace, performing first-time air content adjustment on the smelting furnace, and then heating for smelting, specifically adjusting the smelting furnace to be in a state close to no air. For example, the air in the furnace is adjusted to 0 to 0.09Pa, and then the furnace is electrified and heated until the pig iron is completely melted, and the melting is performed in this state, so that the burning loss of the alloy elements can be prevented.
Step S1022: and after the pure iron and the graphite are completely melted, adding silicon and chromium into the smelting furnace, and smelting after adjusting the air content of the smelting furnace for the second time to obtain molten steel.
Specifically, the implementation procedure of step S1022 is: after pure iron and graphite are completely melted, adding silicon into a smelting furnace, after the silicon is completely melted, adding chromium after about 6 minutes, after the chromium is completely melted, adjusting the temperature of the smelting furnace, then adding the rest graphite for refining, simultaneously adjusting the air content of the smelting furnace for the second time, after the refining, adding vanadium iron and manganese, and after the vanadium iron and the manganese are completely melted, uniformly stirring to obtain molten steel. For example, after silicon and chromium are completely melted, the air in the melting furnace can be adjusted to be 0-0.09 Pa, refining lasts for 12-20 minutes until the liquid level reaction in the melting furnace tends to be stable, deoxidation is carried out through carbon-oxygen reaction, deoxidation is carried out by adjusting the vacuum degree in the melting furnace to promote the carbon-oxygen reaction, nonmetallic inclusions in steel are reduced, chemical composition homogenization is facilitated, ferrovanadium is added after 3 minutes after refining, electrolytic manganese is added after ferrovanadium is completely melted, vacuum volatilization loss of manganese can be reduced, and molten steel is obtained after the ferrovanadium is completely melted and is uniformly stirred.
It should be noted that, in order to ensure that the inclusions in the molten steel have enough time to aggregate, grow, and float, and improve the cleanliness of the molten steel, in the embodiment of the present invention, when the air content in the melting furnace is adjusted for the second time, it may further: blowing an inert gas, such as argon at 0.35 to 0.45MPa, into the furnace at a low pressure for a short time, wherein the blowing time is about 55 to 65 minutes.
Step S103: the molten steel obtained in step S102 is cast into an ingot.
Specifically, the molten steel is subjected to end-point temperature measurement, the temperature is adjusted to 1560-1575 ℃, then pouring is started, after the pouring is finished, the pouring is kept for 35-45 minutes in an inert gas atmosphere, after the cast ingot is completely cooled, a furnace cover is opened, and the cast ingot is taken out.
Step S104: and quenching and tempering the cast ingot obtained in the step S103 to obtain a forged body for later use.
Specifically, the ingot is quenched, cooled to room temperature by industrial oil, tempered, air-cooled to room temperature, and forged to obtain a high-strength forged body for later use. In the step S104, the quenching temperature of the quenching process may be 870 ℃, the quenching time may be 25 to 35 minutes, the tempering temperature of the tempering process may be 350 ℃, and the tempering time may be 110 to 135 minutes.
Step S105: and (5) drawing and cutting the forged body obtained in the step (S104) to obtain the spring steel wire.
Specifically, the surface of the forged body obtained in step S104 may be subjected to acid pickling and phosphating, and then wire drawing and cutting may be performed to obtain the spring steel wire.
Step S106: the spring wire obtained in step S105 is wound into a spring-like stretch-proof member.
Specifically, the spring wire obtained in step S104 may be wound into a spring-like anti-stretch member using a coil spring machine.
It should be noted that step S105 and step S106 may be performed after step S103, that is, after the ingot is obtained in step S103, the ingot may be forged to obtain a forged body, then the forged body may be drawn and cut to obtain a spring wire, the obtained spring wire may be wound into a spring-shaped folded tensile member, and finally, the spring-shaped folded tensile member may be sequentially quenched and tempered to obtain a final folded tensile member product.
In one embodiment of the invention, the obtained spring steel wire or spring-shaped tensile folded part can be derusted by adopting a derusting agent, and the derusting agent comprises the following raw materials in parts by weight: 20-25% of dilute sulfuric acid, 13-21% of phosphoric acid, 12-15% of sodium chloride, 8% of sodium carbonate, 7% of ferrous sulfate, 6% of sodium benzoate, 4% of cyclopropane acid, 3% of triethanolamine, 6% of petroleum sulfonate and 9% of metal ion complexing agent.
As can be seen from the technical solution of the present invention illustrated in fig. 1, compared with the prior art that when the anti-stretch-fold component in the wristband is manufactured, due to the defects that the raw material is unreasonable to select and the manufacturing process is backward, the strength of the anti-stretch-fold component is insufficient, and the like, the technical solution of the present invention, on one hand, selects carbon, silicon, manganese, chromium, and the like as the raw material of the anti-stretch-fold component elaborately, and reasonably configures the components of these elements, thereby improving the selection of the raw material for manufacturing the high-strength anti-stretch-fold component; on the other hand, in the preparation stage, through the improvement of processes such as melting, quenching and tempering, the molten steel is finally poured into a cast ingot with higher strength, so that the finally rolled spring-shaped tensile folding part not only has high strength, but also has stronger toughness, and can meet the requirement of the wrist strap on resisting tension folding.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the system is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided by the present invention, it should be understood that the disclosed system/computing device and method may be implemented in other ways. For example, the system/computing device embodiments described above are merely illustrative, and for example, a division of modules or units is merely one logical division, and an actual implementation may have additional divisions, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, systems or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims (10)

1. An anti-pulling and folding component in a wrist strap is characterized in that the anti-pulling and folding component is prepared from the following chemical components in percentage by weight:
carbon: 0.55-0.60%, silicon: 1.30-1.55%, manganese: 0.55-0.76%, phosphorus: 0-0.01%, nickel: 0.2 to 0.45%, chromium: 0.55-0.76%, copper: 0-0.20%, vanadium: 0.17% -0.23%, titanium: 0.026-0.045%, and the balance of pure iron and inevitable impurities.
2. The tension-resistant member in a wrist band according to claim 1, wherein said inevitable impurities include non-metallic inclusions of: sulfides, alumina, silicates and/or spherical oxides.
3. The tension resistant member in a wristband as recited in claim 1, wherein the vanadium and titanium are present in the form of carbide or nitride.
4. A preparation method of an anti-stretch-break component in a wrist strap is characterized by comprising the following process steps:
step S101: preparing raw materials of chemical components required by smelting according to the following weight percentages: carbon: 0.55-0.60%, silicon: 1.30-1.55%, manganese: 0.55-0.76%, phosphorus: 0-0.01%, nickel: 0.2 to 0.45%, chromium: 0.55-0.76%, copper: 0-0.20%, vanadium: 0.17% -0.23%, titanium: 0.026-0.045%, the rest is pure iron and inevitable impurities;
step S102: putting graphite with 80% mass parts of pure iron and graphite and silicon, chromium, vanadium and manganese in the prepared raw materials into a smelting furnace in sequence to be smelted into molten steel;
step S103: casting the molten steel obtained in the step S102 into an ingot;
step S104: quenching and tempering the cast ingot obtained in the step S103 in sequence to obtain a forged body for later use;
step S105: drawing and cutting the forged body obtained in the step S104 to obtain a spring steel wire;
step S106: the spring wire obtained in step S105 is wound into a spring-like stretch-proof member.
5. The method for manufacturing the anti-stretch-break component in the wrist strap according to claim 4, wherein the step of putting graphite in which pure iron and graphite occupy 80% by mass and silicon, chromium, vanadium and manganese in the prepared raw materials into a furnace in sequence to be smelted into molten steel comprises the following steps:
putting graphite accounting for 80% of the pure iron and graphite in parts by mass into the smelting furnace, and performing first-time air content adjustment on the smelting furnace and then heating for smelting;
and after the pure iron and the graphite are completely melted, adding the silicon and the chromium into the smelting furnace, and smelting after adjusting the air content of the smelting furnace for the second time to obtain the molten steel.
6. The method for manufacturing an anti-tension/break component in a wrist strap according to claim 4 or 5, wherein the basicity of the slag in the furnace is controlled to be 3.1 to 3.8, the content of iron oxide in the slag is not less than 16 wt%, the content of phosphorus in the molten steel is not more than 0.006 wt%, and a deoxidizer of lime and/or fluorite is added to the molten steel.
7. The method for manufacturing an anti-stretch-break component in a wristband according to claim 5, wherein a quenching temperature of the quenching process is 870 ℃ and a quenching time is 25-35 minutes, and a tempering temperature of the tempering process is 350 ℃ and a tempering time is 110-135 minutes.
8. The method of making an in-wristband anti-stretch component according to claim 5, wherein, upon a second air content adjustment to the furnace, the method further comprises:
inert gas is blown into the furnace for a short time at a low pressure.
9. The method for producing an in-wristband anti-stretch-fold component according to any one of claims 5 to 8, further comprising:
and (3) derusting the spring steel wire or the spring-shaped tensile folded part by using a derusting agent.
10. The method for manufacturing an anti-stretch-break component in a wristband as claimed in claim 9, wherein the rust remover comprises the following raw materials in parts by weight: 20-25% of dilute sulfuric acid, 13-21% of phosphoric acid, 12-15% of sodium chloride, 8% of sodium carbonate, 7% of ferrous sulfate, 6% of sodium benzoate, 4% of cyclopropane acid, 3% of triethanolamine, 6% of petroleum sulfonate and 9% of metal ion complexing agent.
CN202010763610.2A 2020-07-31 2020-07-31 Anti-stretch-fold component in wrist strap and preparation method thereof Pending CN111910124A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS579855A (en) * 1980-06-20 1982-01-19 Ito Kiko Kk Steel shot
CN103003461A (en) * 2010-08-30 2013-03-27 株式会社神户制钢所 Steel wire material for high-strength spring which has excellent wire-drawing properties and process for production thereof, and high-strength spring
WO2016158343A1 (en) * 2015-03-27 2016-10-06 株式会社神戸製鋼所 Steel wire for use in bolts that has excellent cold headability and resistance to delayed fracture after quenching and tempering, and bolt
CN107614723A (en) * 2015-05-15 2018-01-19 新日铁住金株式会社 Spring steel
CN109457187A (en) * 2018-12-20 2019-03-12 东北大学 A kind of high-strength spring steel and its production method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS579855A (en) * 1980-06-20 1982-01-19 Ito Kiko Kk Steel shot
CN103003461A (en) * 2010-08-30 2013-03-27 株式会社神户制钢所 Steel wire material for high-strength spring which has excellent wire-drawing properties and process for production thereof, and high-strength spring
WO2016158343A1 (en) * 2015-03-27 2016-10-06 株式会社神戸製鋼所 Steel wire for use in bolts that has excellent cold headability and resistance to delayed fracture after quenching and tempering, and bolt
CN107614723A (en) * 2015-05-15 2018-01-19 新日铁住金株式会社 Spring steel
CN109457187A (en) * 2018-12-20 2019-03-12 东北大学 A kind of high-strength spring steel and its production method

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