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CN111906944B - Laser welded diamond saw blade for cutting reinforced concrete and its preparation process - Google Patents

Laser welded diamond saw blade for cutting reinforced concrete and its preparation process Download PDF

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Publication number
CN111906944B
CN111906944B CN202010579555.1A CN202010579555A CN111906944B CN 111906944 B CN111906944 B CN 111906944B CN 202010579555 A CN202010579555 A CN 202010579555A CN 111906944 B CN111906944 B CN 111906944B
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diamond
parts
laser
cutter head
saw blade
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CN111906944A (en
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蒋武峰
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Jiangsu Huachang Tools Manufacturing Co ltd
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Jiangsu Huachang Tools Manufacturing Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/121—Circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • 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
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
    • 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
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • 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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Plasma & Fusion (AREA)
  • Mining & Mineral Resources (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

本发明公开了一种切割钢筋混凝土的激光焊接金刚石锯片及其制备工艺，属于钢筋混凝土切割工具技术领域。该激光焊接金刚石锯片包括圆形基体与焊接在基体外边缘上的金刚石刀头，其中：所述金刚石刀头为多个，均匀排布于基体外圆周上，相邻金刚石刀头之间形成V型槽，所述V型槽向基体内延伸出弧形槽Ⅰ；所述金刚石刀头的外端面设计为长城齿结构。刀头原材料由铜、铁、锡、镍、锰、碳化钨粉末以及金刚石、液体石蜡组成，刀头与基体通过激光焊接为一体。本发明通过刀头配方和刀头形状的优化设计，使得切割钢筋混凝土的激光片通过外圆齿快速切入定位，随着切割深度的加深，后续的金刚石刀头逐步扩大，连续的U槽可以满足各种路况的施工需要。

The present invention discloses a laser-welded diamond saw blade for cutting reinforced concrete and a preparation process thereof, and belongs to the technical field of reinforced concrete cutting tools. The laser-welded diamond saw blade comprises a circular base and a diamond cutter head welded on the outer edge of the base, wherein: the diamond cutter heads are multiple and evenly arranged on the outer circumference of the base, and a V-shaped groove is formed between adjacent diamond cutter heads, and the V-shaped groove extends an arc groove I into the base; the outer end face of the diamond cutter head is designed as a Great Wall tooth structure. The cutter head raw materials are composed of copper, iron, tin, nickel, manganese, tungsten carbide powder, diamond, and liquid paraffin, and the cutter head and the base are laser welded into one. The present invention optimizes the cutter head formula and the cutter head shape so that the laser blade for cutting reinforced concrete can be quickly cut into position through the outer circular teeth. As the cutting depth increases, the subsequent diamond cutter heads gradually expand, and the continuous U-groove can meet the construction needs of various road conditions.

Description

Laser welding diamond saw blade for cutting reinforced concrete and preparation process thereof
Technical Field
The invention relates to the technical field of reinforced concrete cutting tools, in particular to a laser welding diamond saw blade for cutting reinforced concrete and a preparation process thereof.
Background
The diamond saw blade is a cutting tool and is widely applied to processing of hard and brittle materials such as concrete, refractory materials, stone materials, ceramics and the like. The diamond saw blade mainly comprises a matrix and a tool bit, wherein the matrix is a main supporting part for bonding the tool bit. The tool bit is a part which is cut in the using process, the tool bit can be continuously consumed in use, the matrix can not be used, and the tool bit can cut because the tool bit contains diamond which is the hardest substance at present and rubs and cuts a processed object in the tool bit. And the diamond particles are wrapped inside the tool bit by metal.
In the industry's great background of the current high-speed development, safety and efficiency are indispensable requirements for laser welding sheets, and the problem of safety of laser welding sheets is the constant subject, especially when used in severe environments. Meanwhile, workers in construction teams wish to improve the working efficiency as much as possible under the condition of guaranteeing the quality and safety.
Disclosure of Invention
The invention aims to provide a laser welding diamond saw blade for cutting reinforced concrete and a preparation process thereof, and the diamond saw blade has the characteristics of safety, stability and cutting.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The laser welding diamond saw blade for cutting reinforced concrete comprises a round matrix and a plurality of diamond tool bits welded on the outer edge of the matrix, wherein the diamond tool bits are uniformly distributed on the outer circumference of the matrix, V-shaped grooves are formed between adjacent diamond tool bits, the V-shaped grooves extend out of an arc-shaped groove I into the matrix, the outer end face of each diamond tool bit is designed into a long merlons structure (the outer end face of each diamond tool bit is designed into a plurality of U-shaped grooves, and the number of the U-shaped grooves on each diamond tool bit is 4-6).
The diamond saw blade cutting machine comprises a base body, wherein a mounting hole is formed in the center of the base body and used for mounting a diamond saw blade on the cutting machine, a cooling hole and arc grooves II are formed in the base body, the arc grooves II are arranged between the mounting hole and the arc grooves I, the number of the arc grooves II is equal to that of the arc grooves I, one end of each arc groove II is located between two adjacent arc grooves I, the other end of each arc groove II extends towards the direction of the mounting hole, the other end of each arc groove II is in a hook shape, and 2-5 cooling holes are formed between two adjacent arc grooves II.
The diamond tool bit comprises the following raw materials in parts by weight:
14-35 parts of copper, 22-46 parts of iron, 2-7 parts of tin, 2-10 parts of nickel, 4-17 parts of manganese, 11-19 parts of tungsten carbide, 0.1-0.7 part of liquid paraffin and 1.0-2.2 parts of diamond.
The diamond tool bit comprises the following raw materials in parts by weight:
17-29 parts of copper, 27-41 parts of iron, 4-7 parts of tin, 4-8 parts of nickel, 9-15 parts of manganese, 13-17 parts of tungsten carbide, 0.2-0.6 part of liquid paraffin and 1.1-1.8 parts of diamond.
The diamond tool bit comprises the following raw materials in parts by weight:
25 parts of copper, 40 parts of iron, 5 parts of tin, 7 parts of nickel, 9 parts of manganese, 17 parts of tungsten carbide, 0.3 part of liquid paraffin and 1.2 parts of diamond.
The diamond grain size in the cutter head raw material is 30/40, 40/50 or 50/60, and the compressive strength is 25-40kg.
The preparation process of the laser welding diamond saw blade for cutting reinforced concrete comprises the following steps:
(1) Processing a substrate:
the steel plate is cut into a matrix shape by laser, then heat treatment is carried out, wherein the heat treatment process is that oil quenching is carried out for 10-15 minutes at 865-880 ℃, then tempering is carried out for 2-5 hours at 450-500 ℃, and conventional leveling and polishing are carried out after the heat treatment for standby.
(2) Preparing a diamond tool bit:
The diamond tool bit is manufactured by uniformly mixing diamond tool bit raw materials in proportion, cold press molding after mixing transition layer raw materials, connecting the diamond tool bit and the transition layer together through hot press sintering by arranging a 1-2mm thick transition layer on the inner side of the diamond tool bit after cold press molding, and polishing by a grinding wheel abrasive belt, wherein the hot press sintering temperature is 800-840 ℃, the pressure is 300-380 kg/cm 2, and the heat preservation time is 120-300 seconds. The transition layer comprises 45-60wt.% of Fe, 2-5wt.% of Mn and the balance of Cu.
(3) Laser welding:
The diamond tool bit is placed at the corresponding position around the base body according to the drawing requirement, the light spot of the laser welding machine is adjusted to the proper position of the tool bit and the base body, the laser welding machine is started to weld the tool bit and the base body together at the moment of laser penetration, the welding process parameters are that a CO 2 laser is adopted to carry out double-sided laser welding, the laser spot diameter is 0.4mm, the laser power is 700-750W, the welding speed is 10-14mm/s, the shielding gas is argon, the shielding gas flow is 0.5L/min, the defocusing amount is 1.2-1.6mm, the laser beam deviates to one side of the base body, the deviation amount is 0.2-0.3mm, and the laser incident angle is 12-15 degrees. The width of the welding line is 1-1.5mm, and the penetration depth is 2-2.6mm.
(4) And (3) polishing the tool bit working surface of the welded diamond saw blade by using a grinding wheel to expose the diamond, and polishing the diamond with a 120-mesh abrasive belt by using a polishing machine until the surface of the substrate is bright.
The laser welding diamond saw blade designed and prepared by the invention can meet the requirements of pavement construction and the like for cutting various pavements and wall surfaces, and has the following advantages:
1. Through the research design of tool bit grinding technology, design the diamond tool bit into long merlons shape, each U type basin can cool off fast and get rid of cutting piece, reaches the purpose of quick stable cutting finally.
2. According to the invention, the substrate and the cutter head are welded by double-sided laser, and optimized double-sided laser welding process parameters are adopted for the chemical composition of the cutter head, so that the bending strength (the bending strength of a laser welding line is greater than 2000MPa and greater than that of the substrate) is improved, the safety is higher, and meanwhile, the two arc grooves on the substrate are designed to improve the dry cutting air cooling speed, so that the substrate always maintains a low-temperature high-strength state, the use safety coefficient of the saw blade is improved, and the cutter head is not easy to fall off when in extreme conditions.
3. According to the invention, in the formula of the cutter head, the addition of a proper amount of alloy elements such as nickel, manganese, tungsten carbide and the like improves the heat resistance of the cutter head, and the laser sheet can be subjected to dry cutting for a longer time under the same conditions.
4. According to the invention, ternary element FeMnCu (45-60 wt.% of Fe, 2-5wt.% of Mn and the balance of Cu) is selected as a transition layer, low-melting element Sn and the like are not contained in the transition layer, meanwhile, the chemical components of a matrix (Fe and a small amount of Mn) and the chemical components of a tool bit (containing a large amount of Fe, cu and a small amount of Mn) are considered, elements similar to the chemical components of the matrix and the tool bit are selected as much as possible during the selection of the filter layer components, so that the welding combination degree can be improved, meanwhile, the Mn element is selected to consider that both the matrix and the tool bit contain Mn element, the combination of special-shaped materials is more facilitated, and on the other hand, the addition of a small amount of Mn can play the roles of solid solution strengthening, and the wear resistance can be increased and the welding pore effect can be reduced.
Drawings
Fig. 1 is a schematic view of a laser welding diamond saw blade according to the present invention.
Fig. 2 is a cross-sectional view of a laser welded diamond saw blade according to the present invention.
In the figure, a 1-substrate, a 2-diamond tool bit, a 3-V-shaped groove, a 4-arc-shaped groove I, a 5-mounting hole, a 6-cooling hole and a 7-arc-shaped groove II are shown.
Detailed Description
The technical scheme of the invention is further described by the following specific examples.
The invention provides a laser welding diamond saw blade for cutting reinforced concrete, the structure of which is shown in figures 1-2. The diamond saw blade comprises a round base body 1 and a plurality of diamond tool bits 2 welded on the outer edge of the base body, wherein the diamond tool bits 2 are uniformly distributed on the outer circumference of the base body, V-shaped grooves 3 are formed between adjacent diamond tool bits, the V-shaped grooves 3 extend inwards of the base body to form arc grooves I4, the outer end face of the diamond tool bit is designed into a long urban tooth structure, the great wall tooth structure is that the outer end face of the diamond tool bit is designed into a plurality of U-shaped grooves, and the number of the U-shaped grooves on each diamond tool bit is 4-6.
The diamond saw blade cutting machine comprises a base body, wherein a mounting hole 5 is formed in the center of the base body and used for mounting a diamond saw blade on the cutting machine, a cooling hole 6 and arc grooves II7 are formed in the base body, the arc grooves II7 are arranged between the mounting hole and the arc grooves I, the number of the arc grooves II is equal to that of the arc grooves I, one end of each arc groove II is located between two adjacent arc grooves I, the other end of each arc groove II extends towards the direction of the mounting hole, the other end of each arc groove II is in a hook shape, and 2-5 cooling holes are formed between two adjacent arc grooves II.
Example 1:
the embodiment is a preparation method of a laser welding diamond saw blade for cutting reinforced concrete, which comprises the following specific processes:
(1) Processing a substrate:
the steel plate is subjected to heat treatment after being cut into a matrix shape by laser, namely, oil quenching is carried out for 10-15 minutes at 860 ℃, then tempering is carried out for 2-5 hours at 480 ℃, and the steel plate is leveled and polished for later use.
(2) Preparing a diamond tool bit:
2.7kg of copper powder, 3.9kg of iron, 0.55kg of nickel, 1.15kg of manganese, 0.4kg of tin and 1.3kg of tungsten carbide are put into a mixing barrel to be mixed for 30 minutes, 0.08kg of liquid paraffin and 0.2kg of diamond are added, and the mixing is continued for 3 hours. Pouring the mixed powder into a mould for cold compression molding;
The raw materials of the transition layer are Fe50 wt%, mn4 wt% and Cu balance, and the raw materials of the transition layer are uniformly mixed and then cold-pressed for molding;
And (3) arranging a transition layer with the thickness of 1.5mm on the inner side of the diamond tool bit after cold press molding, connecting the diamond tool bit with the transition layer through hot press sintering, and polishing by using a grinding wheel abrasive belt to manufacture the diamond tool bit with the transition layer, wherein the hot press sintering temperature is 820 ℃, the pressure is 320kg/cm 2, and the heat preservation time is 200 seconds.
(3) Laser welding:
The diamond tool bit is placed at the corresponding position around the base body according to the requirement of the drawing, the light spot of the laser welding machine is adjusted to the proper position of the tool bit and the base body, the laser welding machine is started to weld the tool bit and the base body together at the moment of laser penetration, the welding process parameters are that a CO 2 laser is adopted to carry out double-sided laser welding, the laser spot diameter is 0.4mm, the laser power is 720W, the welding speed is 12mm/s, the shielding gas is argon, the shielding gas flow is 0.5L/min, the defocusing amount is 1.5mm, the laser beam deviates to one side of the base body, the deviation amount is 0.25mm, and the laser incident angle is 15 degrees. The width of the welding line is 1.4mm, and the penetration depth is 2.5mm.
(4) And (3) polishing the tool bit working surface of the welded diamond saw blade by using a grinding wheel to expose the diamond, and polishing the diamond with a 120-mesh abrasive belt by using a polishing machine until the surface of the substrate is bright. And finally, detecting the welding strength of each diamond tool bit, and printing, packaging and warehousing after the diamond tool bits are qualified.
The bending strength 2150MPa of the laser welding seam is larger than that of the matrix through detection, the matrix is broken during testing, and the welding seam is good.
Example 2:
the embodiment is a preparation method of a laser welding diamond saw blade for cutting reinforced concrete, which comprises the following specific processes:
(1) Processing a substrate:
the steel plate is subjected to heat treatment after being cut into a matrix shape by laser, namely, oil quenching is carried out for 10-15 minutes at 860 ℃, then tempering is carried out for 2-5 hours at 480 ℃, and the steel plate is leveled and polished for later use.
(2) Preparing a diamond tool bit:
2.65kg of copper powder, 4.0kg of iron, 0.5kg of nickel, 1.1kg of manganese, 0.40kg of tin and 1.35kg of tungsten carbide are put into a mixing barrel to be mixed for 30 minutes, 0.06kg of liquid paraffin and 0.18kg of diamond are added, and the mixing is continued for 3 hours. Pouring the mixed powder into a mould for cold compression molding;
The raw materials of the transition layer are Fe50 wt%, mn4 wt% and Cu balance, and the raw materials of the transition layer are uniformly mixed and then cold-pressed for molding;
And (3) arranging a transition layer with the thickness of 1.5mm on the inner side of the diamond tool bit after cold press molding, connecting the diamond tool bit with the transition layer through hot press sintering, and polishing by using a grinding wheel abrasive belt to manufacture the diamond tool bit with the transition layer, wherein the hot press sintering temperature is 820 ℃, the pressure is 320kg/cm 2, and the heat preservation time is 200 seconds.
(3) Laser welding:
The diamond tool bit is placed at the corresponding position around the base body according to the requirement of the drawing, the light spot of the laser welding machine is adjusted to the proper position of the tool bit and the base body, the laser welding machine is started to weld the tool bit and the base body together at the moment of laser penetration, the welding process parameters are that a CO 2 laser is adopted to carry out double-sided laser welding, the laser spot diameter is 0.4mm, the laser power is 720W, the welding speed is 12mm/s, the shielding gas is argon, the shielding gas flow is 0.5L/min, the defocusing amount is 1.5mm, the laser beam deviates to one side of the base body, the deviation amount is 0.25mm, and the laser incident angle is 15 degrees. The width of the welding line is 1.4mm, and the penetration depth is 2.5mm.
(4) And (3) polishing the tool bit working surface of the welded diamond saw blade by using a grinding wheel to expose the diamond, and polishing the diamond with a 120-mesh abrasive belt by using a polishing machine until the surface of the substrate is bright. And finally, detecting the welding strength of each diamond tool bit, and printing, packaging and warehousing after the diamond tool bits are qualified.
The bending strength of the laser welding seam is 2125MPa, which is larger than that of the matrix, and the matrix is broken and the welding seam is perfect when tested.
Example 2:
the embodiment is a preparation method of a laser welding diamond saw blade for cutting reinforced concrete, which comprises the following specific processes:
(1) Processing a substrate:
the steel plate is subjected to heat treatment after being cut into a matrix shape by laser, namely, oil quenching is carried out for 10-15 minutes at 860 ℃, then tempering is carried out for 2-5 hours at 480 ℃, and the steel plate is leveled and polished for later use.
(2) Preparing a diamond tool bit:
2.5kg of copper powder, 4.0kg of iron, 0.4kg of nickel, 0.9kg of manganese, 0.5kg of tin and 1.5kg of tungsten carbide are put into a mixing barrel to be mixed for 30 minutes, 0.05kg of liquid paraffin and 0.15kg of diamond are added, and the mixing is continued for 3 hours. Pouring the mixed powder into a mould for cold compression molding;
The raw materials of the transition layer are Fe50 wt%, mn4 wt% and Cu balance, and the raw materials of the transition layer are uniformly mixed and then cold-pressed for molding;
And (3) arranging a transition layer with the thickness of 1.5mm on the inner side of the diamond tool bit after cold press molding, connecting the diamond tool bit with the transition layer through hot press sintering, and polishing by using a grinding wheel abrasive belt to manufacture the diamond tool bit with the transition layer, wherein the hot press sintering temperature is 820 ℃, the pressure is 320kg/cm 2, and the heat preservation time is 200 seconds.
(3) Laser welding:
The diamond tool bit is placed at the corresponding position around the base body according to the requirement of the drawing, the light spot of the laser welding machine is adjusted to the proper position of the tool bit and the base body, the laser welding machine is started to weld the tool bit and the base body together at the moment of laser penetration, the welding process parameters are that a CO 2 laser is adopted to carry out double-sided laser welding, the laser spot diameter is 0.4mm, the laser power is 720W, the welding speed is 12mm/s, the shielding gas is argon, the shielding gas flow is 0.5L/min, the defocusing amount is 1.5mm, the laser beam deviates to one side of the base body, the deviation amount is 0.25mm, and the laser incident angle is 15 degrees. The width of the welding line is 1.4mm, and the penetration depth is 2.5mm.
(4) And (3) polishing the tool bit working surface of the welded diamond saw blade by using a grinding wheel to expose the diamond, and polishing the diamond with a 120-mesh abrasive belt by using a polishing machine until the surface of the substrate is bright. And finally, detecting the welding strength of each diamond tool bit, and printing, packaging and warehousing after the diamond tool bits are qualified.
The bending strength of the laser welding seam is 2120MPa, which is larger than that of the matrix, and the matrix is broken and the welding seam is perfect when tested.

Claims (7)

1.一种切割钢筋混凝土的激光焊接金刚石锯片，其特征在于：该激光焊接金刚石锯片包括圆形基体与焊接在基体外边缘上的金刚石刀头，其中：所述金刚石刀头为多个，均匀排布于基体外圆周上，相邻金刚石刀头之间形成V型槽，所述V型槽向基体内延伸出弧形槽Ⅰ；所述金刚石刀头的外端面设计为长城齿结构；1. A laser welded diamond saw blade for cutting reinforced concrete, characterized in that: the laser welded diamond saw blade comprises a circular base and a diamond cutter head welded on the outer edge of the base, wherein: the diamond cutter heads are multiple and evenly arranged on the outer circumference of the base, a V-shaped groove is formed between adjacent diamond cutter heads, and the V-shaped groove extends into the base to form an arc groove I; the outer end surface of the diamond cutter head is designed as a Great Wall tooth structure; 所述金刚石刀头的长城齿结构是指金刚石刀头外端面设计多个U型槽，每个金刚石刀头上U型槽的数量为4-6个；所述基体上还设有冷却孔及弧形槽Ⅱ，弧形槽Ⅱ设置于安装孔与弧形槽Ⅰ之间，所述弧形槽Ⅱ的数量与弧形槽Ⅰ的数量相等；所述弧形槽Ⅱ的一端位于相邻两个弧形槽Ⅰ之间，弧形槽Ⅱ的另一端向安装孔方向延伸，且弧形槽Ⅱ的另一端呈钩状；The Great Wall tooth structure of the diamond cutter head refers to a plurality of U-shaped grooves designed on the outer end surface of the diamond cutter head, and the number of U-shaped grooves on each diamond cutter head is 4-6; the base body is also provided with a cooling hole and an arc groove II, and the arc groove II is arranged between the mounting hole and the arc groove I, and the number of the arc groove II is equal to the number of the arc groove I; one end of the arc groove II is located between two adjacent arc grooves I, and the other end of the arc groove II extends toward the mounting hole, and the other end of the arc groove II is hook-shaped; 所述金刚石刀头按重量份数计的原料组成为：铜14-35份，铁22-46份，锡2-7份，镍2-10份，锰4-17份，碳化钨11-19份，液体石蜡0.1-0.7份，金刚石1.0-2.2份；The raw material composition of the diamond segment is as follows: 14-35 parts of copper, 22-46 parts of iron, 2-7 parts of tin, 2-10 parts of nickel, 4-17 parts of manganese, 11-19 parts of tungsten carbide, 0.1-0.7 parts of liquid paraffin, and 1.0-2.2 parts of diamond. 所述金刚石刀头制备过程为：将金刚石刀头原料按比例混合均匀后，冷压成型；过渡层原料混合后冷压成型；将冷压成型后的金刚石刀头内侧设置1-2mm厚过渡层，通过热压烧结将金刚石刀头与过渡层连接在一起，经砂轮砂带打磨制作成带有过渡层的金刚石刀头；The diamond cutter head preparation process is as follows: after mixing the raw materials of the diamond cutter head uniformly according to a proportion, cold pressing is performed; after mixing the raw materials of the transition layer, cold pressing is performed; a 1-2 mm thick transition layer is arranged inside the cold pressed diamond cutter head, the diamond cutter head and the transition layer are connected together by hot pressing sintering, and the diamond cutter head with the transition layer is polished by a grinding wheel and abrasive belt; 所述过渡层化学组成为：Fe 45-60wt.％，Mn 2-5wt.％，Cu余量。The chemical composition of the transition layer is: Fe 45-60wt.%, Mn 2-5wt.%, and the balance is Cu. 2.根据权利要求1所述的切割钢筋混凝土的激光焊接金刚石锯片，其特征在于：所述基体中心设有安装孔，用于将金刚石锯片安装在切割机上。2. The laser welded diamond saw blade for cutting reinforced concrete according to claim 1, characterized in that a mounting hole is provided in the center of the base for mounting the diamond saw blade on a cutting machine. 3.根据权利要求2所述的切割钢筋混凝土的激光焊接金刚石锯片，其特征在于：相邻两个弧形槽Ⅱ之间设有2-5个冷却孔。3. The laser welded diamond saw blade for cutting reinforced concrete according to claim 2, characterized in that 2-5 cooling holes are provided between two adjacent arc grooves II. 4.根据权利要求1所述的切割钢筋混凝土的激光焊接金刚石锯片，其特征在于：所述基体的材质为30CrMo，所述刀头中含有金刚石，金刚石粒度30/40、40/50或50/60，抗压强度25-40kg。4. The laser welded diamond saw blade for cutting reinforced concrete according to claim 1, characterized in that: the material of the substrate is 30CrMo, the cutter head contains diamond, the diamond particle size is 30/40, 40/50 or 50/60, and the compressive strength is 25-40kg. 5.根据权利要求1所述的切割钢筋混凝土的激光焊接金刚石锯片，其特征在于：所述金刚石刀头按重量份数计的原料组成如下：5. The laser welded diamond saw blade for cutting reinforced concrete according to claim 1, characterized in that the raw material composition of the diamond segment by weight is as follows: 铜17-29份，铁27-41份，锡4-7份，镍4-8份，锰9-15份，碳化钨13-17份，液体石蜡0.2-0.6份，金刚石1.1-1.8份。17-29 parts of copper, 27-41 parts of iron, 4-7 parts of tin, 4-8 parts of nickel, 9-15 parts of manganese, 13-17 parts of tungsten carbide, 0.2-0.6 parts of liquid paraffin, and 1.1-1.8 parts of diamond. 6.根据权利要求1所述的切割钢筋混凝土的激光焊接金刚石锯片，其特征在于：所述金刚石刀头按重量份数计的原料组成如下：6. The laser welded diamond saw blade for cutting reinforced concrete according to claim 1, characterized in that the raw material composition of the diamond segment in parts by weight is as follows: 铜25份，铁40份，锡5份，镍7份，锰9份，碳化钨17份，液体石蜡0.3份，金刚石1.2份。25 parts of copper, 40 parts of iron, 5 parts of tin, 7 parts of nickel, 9 parts of manganese, 17 parts of tungsten carbide, 0.3 parts of liquid paraffin, and 1.2 parts of diamond. 7.根据权利要求1所述的切割钢筋混凝土的激光焊接金刚石锯片的制备工艺，其特征在于：该工艺包括如下步骤：7. The process for preparing a laser welded diamond saw blade for cutting reinforced concrete according to claim 1, characterized in that the process comprises the following steps: (1)基体加工：(1) Matrix processing: 钢板进行激光切割为基体形状，然后热处理，热处理过程为：865-880℃油淬10-15分钟，然后在450-500℃回火2-5小时；热处理后进行常规的整平和打磨后备用；The steel plate is laser cut into the matrix shape and then heat treated. The heat treatment process is: oil quenching at 865-880℃ for 10-15 minutes, and then tempering at 450-500℃ for 2-5 hours; after heat treatment, it is conventionally leveled and polished for use; (2)制备金刚石刀头，制备过程中所述热压烧结温度为800～840℃，压力300～380kg/cm2，保温时间120-300秒；(2) Preparing a diamond segment, wherein the hot pressing sintering temperature is 800-840° C., the pressure is 300-380 kg/cm 2 , and the holding time is 120-300 seconds; (3)激光焊接：(3) Laser welding: 将金刚石刀头按图纸要求放在基体周围相应位置上，将激光焊接机的光点调整到刀头与基体合适的位置，启动激光焊接机焊接，使刀头和基体在激光穿透的瞬间焊接在一起；焊接工艺参数为：采用CO2激光器进行双面激光焊，激光光斑直径0.4mm，激光功率700-750W，焊接速度10-14mm/s；保护气体为氩气，保护气流量0.5L/min，离焦量1.2-1.6mm，激光束偏向基体一侧，偏移量为0.2-0.3mm，激光入射角12-15°，焊缝宽度1-1.5mm，穿透深度2-2.6mm；Place the diamond cutter head on the corresponding position around the substrate according to the requirements of the drawing, adjust the light spot of the laser welding machine to the appropriate position between the cutter head and the substrate, start the laser welding machine to weld the cutter head and the substrate together at the moment of laser penetration; welding process parameters are: double-sided laser welding using CO2 laser, laser spot diameter 0.4mm, laser power 700-750W, welding speed 10-14mm/s; shielding gas is argon, shielding gas flow 0.5L/min, defocus 1.2-1.6mm, laser beam deflected to one side of the substrate, offset 0.2-0.3mm, laser incident angle 12-15°, weld width 1-1.5mm, penetration depth 2-2.6mm; (4)将焊接后的金刚石锯片的刀头工作面用砂轮打磨，使金刚石暴露出来，再用磨光机配120目砂带打磨至基体表面光亮。(4) Grind the working surface of the welded diamond saw blade with a grinding wheel to expose the diamond, and then use a grinder with a 120-grit sand belt to grind until the surface of the base is bright.
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Denomination of invention: Cutting laser welding diamond saw blade for reinforced concrete and its preparation process

Granted publication date: 20250321

Pledgee: Jiangsu Danyang Rural Commercial Bank Co.,Ltd.

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