[go: up one dir, main page]

CN1062785C - Method of producing seamless hot-finished tube - Google Patents

Method of producing seamless hot-finished tube Download PDF

Info

Publication number
CN1062785C
CN1062785C CN95193596A CN95193596A CN1062785C CN 1062785 C CN1062785 C CN 1062785C CN 95193596 A CN95193596 A CN 95193596A CN 95193596 A CN95193596 A CN 95193596A CN 1062785 C CN1062785 C CN 1062785C
Authority
CN
China
Prior art keywords
steel
continuous casting
billet
section
carbon
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN95193596A
Other languages
Chinese (zh)
Other versions
CN1150767A (en
Inventor
海茵茨·约瑟夫·克朗
汉斯·科尔海格
汉斯-埃克·威默
卡尔海茵茨·库茨恩伯格
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19520833A external-priority patent/DE19520833C2/en
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of CN1150767A publication Critical patent/CN1150767A/en
Application granted granted Critical
Publication of CN1062785C publication Critical patent/CN1062785C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/10—Piercing billets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/02—Rolling special iron alloys, e.g. stainless steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
    • B21H1/12—Making articles shaped as bodies of revolution rings of restricted axial length rings for ball or roller bearings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Heat Treatment Of Steel (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Heat Treatment Of Articles (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Extrusion Of Metal (AREA)

Abstract

The invention concerns a method for the production of a seamless hot-finished tube from steel with reduced deformability, in particular roller-bearing steel, the method calling for a pretreated and degassed as well as deoxidized liquid steel of the required chemical composition to be continuously cast with any cross-section and, after separation of the billet, for the casting to be divided into suitable lengths and shaped. The invention calls for the cut lengths to be heated to the shaping temperature without any preshaping, i.e. as cast, and without any heat treatment (diffusion anealing), and fed to a tube-production plant.

Description

Produce the method for seamless hot-finished tube
The present invention relates to a kind of method of producing hot-rolled pipe by the especially hypereutectoid steel of high-carbon.
Be used for making the corresponding steel of most rolling bearings by the material of DIN system 100Cr6 with by other standards and manual of standards at European Region, so because high phosphorus content belongs to hypereutectoid steel.In order to produce the raw material of hot-rolled pipe, adopt following method as the various rolling bearing rings of processing.
From the pig iron, vacuum degassing in LD steel converter workshop and ladle furnace and bag, or by another kind of scheme from E steel workshop, through ladle furnace and Bao Nei vacuum degassing, and casting ingot through remelting refining workshop under special circumstances, it rolls into circular pipe blank (R hrenrund) on the large steel ingot rolling mill.This circular pipe blank preferably is shaped to hot-rolled pipe (referring to steel pipe handbook the 10th edition, Vulkan publishing house,, 141-143 page or leaf in 1986) by means of A Saier three-roller type tube rolling method.Usually assel elongator has a swinging heating furnace as firing equipment, is provided with a perforating apparatus that is designed to the cross roll roll piercing mill in its back, is used to cause hollow ingot.This hollow ingot infeeds one by three assel elongators of forming along the equally distributed cross roll of circumference, and cross roll is provided with the expansion diameter-setting equipment.Heat this intervalve in extraction again as behind the rod of core rod, and make hot-rolled pipe through multimachine seat reducing mill with through the sizing mill of postposition.The shortcoming of this method is, employed circular pipe blank size must be near hot-rolled pipe, and plans the just multiple pipe blank rolling or that forge of needs in order to satisfy the supply of material.
Though the A Saier three-high mill is an equipment of producing rolling bearing tubing first-selection, uses predeformation through being everlasting and also utilize other tubulation apparatus during through the furnace charge of diffusion annealing, as push-bench or mandrel rolling mill (Rohrkontistra β en).
Also known production continuous casting billet (Bloom mostly is rectangle greatly) replaces ingot casting (lngot), and is shaped to circular pipe blank through a rolling or forging process.Also can produce a kind of continuous casting billet of circle by another kind of scheme, to substitute rectangle, in this case, this continuous casting billet also is rolled or forges (referring to La Revue de Metallurgie CIT in April, 1989, the 344-350 page or leaf) after cut-out.According to prior art, deformation extent elects forging ratio as or rolling ratio reaches 1: 5.Before the rolling or forging process, always to carry out diffusion annealing, so that reduce or reduce segregation that casting technique brings as far as possible and thick carbide is separated out.All are above-mentioned, and to be used for the production method cost of preformed material all very high, because must be useful on the very big equipment of investment of distortion, and material will move repeatedly.Because bar always needs to cut again through extending, so also form a certain amount of stub bar simultaneously.Fu Jia work each time and transportation step, meaning has the danger that produces other or worsen defective, and getting rid of these faults will increase expense expenditure.
The purpose of this invention is to provide a kind of method of producing hot-rolled pipe by the especially hypereutectoid steel of high-carbon, the cost of comparing it with known method is low, and, adopt method of the present invention can reach high stock utilization and the short through-flow time of material.
For achieving the above object, by the invention provides a kind of like this method of producing seamless hot-finished tube by the especially hypereutectoid steel of high-carbon, according to said method, liquid steel through preliminary treatment and degasification and deoxidation, on request chemical composition cast in continuous pouring, make the continuous casting billet rod that is divided into blank section stand once to be out of shape after cutting off continuous casting billet, wherein: the continuous casting billet material is manufactured into high-purity, has thin carbide to separate out and high fine granularity; Blank section is without any predeformation that is at as-cast condition with do not heat-treat under the situation as diffusion annealing and be heated to forming temperature, and transport to tubulation apparatus, wherein, in the perforation process of whole operation parts as tubulation apparatus, form a kind of stress state in the blank section that will be out of shape, this stress state is reduced at shear stress under the situation of minimum level has a high as far as possible negative stress mean value s m
Main points of the present invention are the steel undeformed continuous casting billets of the material type of rolling bearing steel especially that use the arbitrary section shape on tubulation apparatus, and traditional so far rolling or forging process that comes the front of having given up has been cancelled the diffusion annealing of prior art requirement.Cancel these operations and saved a large amount of expenses and time.In addition, material obtains better utilization, because cutting repeatedly not so also need not often be cut the head of ingot.Thisly be not out of shape and should be noted that when not having the continuous casting billet of diffusion annealing using, at perforation process during as tubulation apparatus overall process a part of, in wanting the blank section of moulding, caused a kind of stress state, reduce at shear stress under the situation of minimum level, this stress state has high as far as possible negative stress mean value s m
Can be applicable to various types of continuous casting billet products by method of the present invention, as vertical continuous casting base or arc continuous casting base, and irrelevant with shape of cross section, that is to say that quadrangle, octagonal, polygon or circle can.The continuous casting billet of being produced is in distortion in advance not that is be cut under the as-cast condition and be heated to forming temperature after using length, sends into tubulation apparatus then.Confirmed already that particularly advantageous was to produce the seamless steel pipe method with push-bench rolling seamless steel pipe method with deep-draw press.In the method that all are mentioned, the pressing mold that the length that puts into production that is used for perforation process that has heated is inserted a circle in perforation procedure, is causing a negative stress mean value s as the front has been mentioned in the workpiece of moulding mTherefore prevented the material fracture.But also can adopt other perforating apparatus and the operating room that does not seal for this reason, for example when continuous tube rolling or plug roll process, be placed in the taper cross roll roll piercing mill of front.But must be by selecting the location and the type of roll geometric parameter, guide rail, to guarantee also to form a stress state s here m, wherein the share of tension is reduced to minimum degree, therefore no longer includes the danger that makes workpiece that fracture take place in perforation process.
Compare with material with the predeformation that tradition is used through diffusion annealing, adopt that direct continuous casting billet requirement is a kind of to be had the primary carbide of as far as possible equal even fine dispersion and high-purity is arranged and continuous casting billet that particle is thin as far as possible, guarantee these features by following illustrated smelting and casting process.High-purity needs, because the nonmetallic impurity that produces inevitably in the production process of steel, keeps the quantity of its original granularity and every mass unit, and until used as the preformed material that is pipe, they do not extend and change because of distortion.This situation also is applicable to medium size in the same way.Reduce that thick carbide is separated out and traditional so far diffusion annealing of giving up combines.Diffusion annealing is concentration and the assurance even structureization in order to adjust carbon in traditional method.
In order to produce a kind of continuous casting billet material that these features are arranged, as the measure regulation of taking, when the cast continuous casting billet, adopt metallurgy method through changing and special measure by the present invention as the raw material of tubulation apparatus.This is also comprised the poring rate that employing is suitable, for size range 170-240 millimeter, poring rate is preferably in 1.8-1.2 rice/minute scope.This poring rate smelt in conjunction with careful ladle and pans in sealing gland, refractory lining, MOLTEN STEEL FLOW and the special favourable design in aspects such as submersed nozzle, and the composition of the suitable steel relevant especially element al, S and O with pourability and purity 2, guaranteed desirable purity.Above-mentioned poring rate scope makes bubble and impurity be easy to rise to improve purity, does not influence desired fine granularity but should elect as.At cross section rapid solidification hour, just caused having high fine-grained tissue at as-cast condition, and meanwhile blocked separating out of thick carbide.Consider along cross section and see the distribution that to cool off equably and to consider segregation that the shape of circle should be favourable.But but can pour into a mould a kind of quadrangle, octagonal or polygonal of analogy in principle equally.The characteristics of special submersed nozzle are, for the corresponding structure height, and diameter≤25 millimeter.This plays a part favourable for molten iron static pressure and flow behavior when cast.
Material type for the rolling bearing steel is the special circumstances of hypereutectoid steel, and being given for the manufacturing rolling bearing should have a minimum sulfur content, so that can be without any the ring of difficulty ground machining hot-rolled pipe or cut-out.In order to improve purity, then in the steel the least possible sulphur should be arranged, but should have a MIN sulfur content for the machining of steel.The result confirms that with regard to this respect, sulfur content is preferably in the 0.008-0.015 mass percent scope.Different therewith, be chipless basically if continue processing, then sulfur content is up to 0.005 mass percent and thinks favourable.For two kinds of continuation processing types, that is machining or chipless processing, it is advantageous being preferably 1.45 in the scope of ratio between 1.35 to 1.52 of chromium carbon.Exceed this ratio, undesirable carbide streaky structure is certain to influenced.
In addition, for the fine granularity of oxygen content reduction and material, often require to have the aluminum content of least restrictive.Because do not allow to carry out habitual usually calcium processing to form liquid calcium aluminate, so aluminum content must be chosen as the Al that forms in the continuous casting billet of casting in order to improve purity for the rolling bearing steel 2O 3Amount seldom.Come from this reason, adding aluminium by cancellation in the method for the present invention, oxygen content can not reach undesirable value.Al is added in cancellation, and does not mean that the Al that does not have trace in motlten metal, and may be by the Al content of a spot of alloying component, or exists by masonry.
Further specify by method of the present invention by means of the example that picks out at random, promptly, on tubulation apparatus, use the distortion of best hypereutectoid steel and make the seamless axis of rolling without the continuous casting billet of diffusion annealing and be in the charge of, equipment has punch, in punch,, when perforation, form compressive stress state by selecting condition of molding.If for example should produce the hot-rolled pipe of a kind of rolling bearing steel 100Cr6, be of a size of 60.3,8 millimeters of wall thickness.The pig iron of producing from blast furnace makes sulfur content drop to scope less than 0.01 mass percent in the first road desulfurization process.By LD oxygen-blown converter the pig iron is blown into steel with capacity to 250 ton.No slag when entering in the teeming ladle, only add carbon, silicon, manganese and carry out alloy refining and combination deoxidation.Habitually in the past habitual add the way that aluminium carries out pre-deoxidation, come from the reason of having illustrated the front here and no longer adopt.Steel is subjected to further processing in this teeming ladle, that is refined alloy with satisfy the chemical composition limit predesignate, degasification comprises the carbon deoxidation and additionally carries out purity purge (Reinheitsgradsp ü len) with a kind of inert gas in a vacuum.Different with prior art, do not use ladle furnace in the method.Adjustment for the required temperature balance of the pouring temperature that keeps regulation guarantees by the big charge with corresponding enthalpy.On the arc continuous casting base equipment of multicore, then pour into diameter and be 220 millimeters circle.Poring rate is about 1.4 meters/minute.Pans are provided with dividing plate, are used to improve flow divert, and submersed nozzle preferably has diameter≤25 millimeter and long depositing funnel is arranged, and it remains full state.Whole casting space seals with argon gas, and motlten metal is without the hydrogen purge, so do not need stopper rod during cast.In order to control the flow behavior of hypereutectoid steel, adopt special dummy bar to pour into a mould.The feature that after cutting off the growth rod, has shown them, and inspection looks into defective, is transported to push-bench then and goes.Be cut to predetermined blank section long excellent the branch again on cold saw, and be heated to 1140-1180 ℃ in the swinging heating furnace, and in punch, the continuous casting billet of heating carries out being shaped to the first time hollow ingot, is of a size of 223.0 * 51.0 millimeters.This is equivalent to extend 1.39.Further extending at elongator hollow core base is 192.0 * 40.0 millimeters of sizes.This is equivalent to extend 1.43.Afterwards, this has the hollow ingot through extending at the bottom of to insert in the push-bench.By means of the bar of an insertion, hollow ingot is pushed over a plurality of rolling-mill housing, and elongation is 127.5 * 8.25 millimeters of sizes in this case.At this moment, extension is 6.18.Pull out bar and cut the bottom.To this operation realized that the front introduces once adding the moulding of pining for.In order to implement final moulding in stretch-reducing mill, chilled intervalve must reheat forming temperature.In stretch-reducing mill, do not having under the situation of horizontal core, be worked into that final finished is of a size of 60.3 * 8.0 millimeter wall and extension is 2.35.Carry out on traditional cold bed with the air cooling.Then, the hot-rolled pipe of so making after soft annealing as the charging of follow-up cold forming, the rolling or cold-drawn as the Pilger cold pilger mill.In automatic lathe, this cold working pipe is cut into ring, and is processed as the final overall size of rolling bearing.
Major advantage by the inventive method described above is, by high-carbon especially Hypereutectoid steel as pipe preformed material (semi-finished product) can be cancelled need so far preposition Rolling process or forging process and diffusion annealing, this continuous casting billet by no Al smelting and Adopt the pouring condition that has illustrated to have so a kind of tissue morphology, that is, it can directly use In tubulation apparatus, this tubulation apparatus preferably has one by the punch of its device design thought.

Claims (13)

1．由高碳的尤其过共析的钢生产无缝热轧管的方法，按此方法，经预处理和除气以及脱氧的液态钢，在连续浇注中按要求的化学成分浇注，在切断连铸坯后使分割为坯料段的连铸坯棒经受一次变形，其特征为：连铸坯材料被制造成高纯度、有细的碳化物析出和高的细粒度；坯料段在没有任何预变形亦即在铸造状态和没有进行热处理如扩散退火的情况下加热到成型温度，并输往制管设备，其中，在作为制管设备全部工序一部分的穿孔工序中，在要变形的坯料段中形成一种应力状态，这一应力状态在剪应力减到最低程度的情况下具有一个尽可能高的负的应力平均值sm。1. A method for producing seamless hot-rolled pipes from high-carbon, especially hypereutectoid steels. According to this method, the liquid steel, which has been pretreated, degassed and deoxidized, is poured according to the required chemical composition in continuous casting. After the billet, the continuous casting billet bar divided into billet sections is subjected to a deformation, which is characterized by: the continuous casting billet material is manufactured to high purity, fine carbide precipitation and high fine grain size; the billet section is produced without any pre-deformation That is, in the as-cast state and without heat treatment such as diffusion annealing, it is heated to the forming temperature and sent to the pipe making plant, wherein a hole is formed in the billet section to be deformed in the piercing process as part of the overall process of the pipe making plant. A state of stress which has a negative mean stress s m as high as possible with the shear stress minimized. 2．按照权利要求1所述之方法，其特征为：制管设备有一个穿孔机。2. 2. Method according to claim 1, characterized in that the pipe making plant has a piercer. 3．按照权利要求1所述之方法，其特征为：在穿孔工序中使用一个装入坯料段的模具，它具有封闭的外表面。3. 2. Method according to claim 1, characterized in that in the piercing operation a die is used which accommodates the blank segment and which has a closed outer surface. 4．按照权利要求1或3所述之方法，其特征为：坯料段根据选择有四边形或通常的多边形最好圆形的横截面。4. Method according to claim 1 or 3, characterized in that the blank section has, as selected, a quadrangular or generally polygonal, preferably circular, cross-section. 5．按照权利要求1所述之方法，其特征为：在穿孔工序中使用了具有不封闭工作室的尤其是锥形斜辊穿轧机的机组，在这种情况下坯料段最好有圆形横截面。5. Method according to claim 1, characterized in that in the piercing operation a train with an unclosed working chamber, in particular a conical skewed roll piercing mill, is used, in which case the billet section preferably has a circular cross section . 6．按照权利要求1所述之方法，其特征为：在圆形连续浇注中钢浇注为尺寸在170毫米至450毫米范围内，浇注速度在1.8-0.6米/分范围内，对于尺寸范围为170-240毫米浇注速度最好在1.8-1.2米/分范围内。6. According to the method of claim 1, it is characterized in that: in the circular continuous casting, the steel is poured in the range of 170 mm to 450 mm, and the pouring speed is in the range of 1.8-0.6 m/min. For the size range of 170- The pouring speed of 240 mm is preferably in the range of 1.8-1.2 m/min. 7．按照权利要求1所述之方法，其特征为：对于滚动轴承钢材料类的过共析钢，液态钢首先只通过碳、硅和锰不添加铝进行部分脱氧，接着在真空中通过碳彻底脱氧。7. The method according to claim 1, characterized in that for hypereutectoid steels of the rolling bearing steel type, the liquid steel is first partially deoxidized by carbon, silicon and manganese without adding aluminum, and then completely deoxidized by carbon in vacuum. 8．按照权利要求7所述之方法，其特征为：在热轧管通过切削继续加工的情况下，其含硫量在0.008至0.015质量百分比的范围内，在基本上无切屑继续加工的情况下，含硫量最高为0.005质量百分比。8. The method according to claim 7, characterized in that: when the hot-rolled pipe continues to be processed by cutting, the sulfur content thereof is in the range of 0.008 to 0.015 mass percent, and in the case of substantially no chips for further processing, The maximum sulfur content is 0.005 mass percent. 9．按照权利要求7或8所述之方法，其特征为：铬碳比选择在1.35和1.52之间的范围。9. According to the described method of claim 7 or 8, it is characterized in that: the chromium-carbon ratio is selected in the range between 1.35 and 1.52. 10．按照权利要求9所述之方法，其特征为：Cr/C比为1.45。10. The method according to claim 9, characterized in that the Cr/C ratio is 1.45. 11．按照权利要求5或6所述之方法，其特征为：在浇注时，在连铸坯设备中使用浸入式水口，它在相应的结构高度下直径≤25毫米，以及使用一个带隔板的中间罐。11. According to the method described in claim 5 or 6, it is characterized in that: when pouring, a submerged nozzle is used in the continuous casting slab equipment, and its diameter is ≤ 25 mm at the corresponding structural height, and a middle with a partition is used. Can. 12．按照权利要求1所述之方法，其特征为：制管设备是一种顶管机，它有一个作为穿孔机组的压力机。12. A method according to claim 1, characterized in that the pipe making device is a pipe jacking machine which has a press as a piercing unit. 13．按照权利要求1所述之方法，其特征为：钢的生产过程有下列步骤：13. According to the described method of claim 1, it is characterized in that: the production process of steel has the following steps: -制造生铁- Manufacture pig iron -生铁脱硫- Pig iron desulfurization -吹炼工序：LO吹氧转炉-Blowing process: LO oxygen blowing converter -盛钢桶排出：加合金元素C、Si和Mn组合脱氧，不添加铝-Steel drum discharge: add alloying elements C, Si and Mn for combined deoxidation, without adding aluminum -盛钢桶处理不用电弧加热：在真空下除气和碳脱氧，精炼合金，吹洗- Ladle treatment without arc heating: degassing and carbon deoxidation under vacuum, alloy refining, purging -在弧形连续浇注设备上浇注成圆形，浇注时不用氩吹洗。- Pouring into a round shape on arc-shaped continuous casting equipment, without argon purging during pouring.
CN95193596A 1994-06-16 1995-06-13 Method of producing seamless hot-finished tube Expired - Fee Related CN1062785C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEP4422011.1 1994-06-16
DE4422011 1994-06-16
DE19520833.1 1995-05-31
DE19520833A DE19520833C2 (en) 1994-06-16 1995-05-31 Process for the production of a seamless hot-worked pipe

Publications (2)

Publication Number Publication Date
CN1150767A CN1150767A (en) 1997-05-28
CN1062785C true CN1062785C (en) 2001-03-07

Family

ID=25937667

Family Applications (1)

Application Number Title Priority Date Filing Date
CN95193596A Expired - Fee Related CN1062785C (en) 1994-06-16 1995-06-13 Method of producing seamless hot-finished tube

Country Status (11)

Country Link
EP (1) EP0764063B1 (en)
JP (1) JPH10505789A (en)
CN (1) CN1062785C (en)
AT (1) ATE176411T1 (en)
BR (1) BR9508017A (en)
CA (1) CA2192970A1 (en)
CZ (1) CZ364496A3 (en)
ES (1) ES2128736T3 (en)
PL (1) PL178838B1 (en)
SK (1) SK282573B6 (en)
WO (1) WO1995034387A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100518989C (en) * 2004-10-25 2009-07-29 V&M德国有限公司 Method for production of a seamless hot-finished steel tube and device for carrying out the method
WO2013086881A1 (en) * 2011-12-12 2013-06-20 Xie Zhaozong Machining equipment and method for continuous metal casting

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734563C1 (en) * 1997-08-04 1998-12-03 Mannesmann Ag Steel bearing race production
CZ299495B6 (en) * 2005-12-06 2008-08-13 Comtes Fht, S. R. O. A method of producing high strength low alloy steel pipes
CN102179681B (en) * 2011-03-30 2012-10-17 盛泽能源技术有限公司 Pipe mold manufacturing process adopting continuous-casting blank to forge and roll rough blank periodically
CN102366767B (en) * 2011-10-10 2017-01-11 南通超力卷板机制造有限公司 Production method of steel pipe
CN110328253A (en) * 2019-08-14 2019-10-15 江阴华润制钢有限公司 A kind of method for tandem rolling of composite bimetal pipe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR366480A (en) * 1905-06-29 1906-10-05 Perrins Ltd Method and apparatus for the manufacture of tubes
FR2511038A1 (en) * 1981-08-06 1983-02-11 Vallourec PROCESS FOR PRODUCING SEMI-FINISHED STEEL PRODUCTS IN HARD STEELS USING A CONTINUOUS CASTING OPERATION

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB130059A (en) * 1918-01-10 1919-07-31 John Ernest Raworth Improvements in Method of Forming Tubular Articles by Extrusion.
FR1075098A (en) * 1953-02-28 1954-10-12 Louvroil Montbard Aulnoye Hot production process for seamless tubes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR366480A (en) * 1905-06-29 1906-10-05 Perrins Ltd Method and apparatus for the manufacture of tubes
FR2511038A1 (en) * 1981-08-06 1983-02-11 Vallourec PROCESS FOR PRODUCING SEMI-FINISHED STEEL PRODUCTS IN HARD STEELS USING A CONTINUOUS CASTING OPERATION

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100518989C (en) * 2004-10-25 2009-07-29 V&M德国有限公司 Method for production of a seamless hot-finished steel tube and device for carrying out the method
WO2013086881A1 (en) * 2011-12-12 2013-06-20 Xie Zhaozong Machining equipment and method for continuous metal casting

Also Published As

Publication number Publication date
BR9508017A (en) 1997-09-02
CN1150767A (en) 1997-05-28
JPH10505789A (en) 1998-06-09
PL178838B1 (en) 2000-06-30
ATE176411T1 (en) 1999-02-15
ES2128736T3 (en) 1999-05-16
PL317837A1 (en) 1997-04-28
CA2192970A1 (en) 1995-12-21
EP0764063A1 (en) 1997-03-26
EP0764063B1 (en) 1999-02-03
SK282573B6 (en) 2002-10-08
SK159796A3 (en) 1997-06-04
MX9606085A (en) 1998-05-31
WO1995034387A1 (en) 1995-12-21
CZ364496A3 (en) 1998-03-18

Similar Documents

Publication Publication Date Title
JP2023505172A (en) Hot-rolled H-shaped steel based on beam blank rolling forming and its preparation method
CN107164698B (en) The new method for producing of corrosion-resistant built-in groove
CN104190740B (en) The production method of hot rolled seamless steel tube pipe
CN113718162A (en) Hot work die steel H13 and manufacturing process of continuous casting and rolling circle thereof
CN1062785C (en) Method of producing seamless hot-finished tube
RU2005141563A (en) METHOD AND INSTALLATION FOR PRODUCING STEEL PRODUCTS WITH HIGH SURFACE QUALITY
CN113843283A (en) A kind of preparation method of large-scale cold work die billet
CN114657313A (en) Production method of high-chromium high-strength mining steel strand wire rod
CN108823508A (en) A kind of half flow harden steel band of 590MPa and its bell furnace production technology
CN112662832A (en) Production method of special-section square billet of high-carbon chromium bearing steel
CN107460409B (en) high-Al electrical steel square billet for pole claw of automobile generator and production method thereof
CN114855072A (en) Manufacturing method of hot-rolled seamless steel tube for rare earth microalloying machining
CN104789871A (en) 27SiMn seamless steel tube for thick-wall cold-drawn hydraulic cylinder barrel and preparation method
CN113996772A (en) Preparation method of 95Cr18
CN119242880A (en) A method for preparing HPB300 continuous casting billet
DE19520833C2 (en) Process for the production of a seamless hot-worked pipe
CN107267728B (en) Hot-rolled steel strip for cold drawing and production method thereof
CN116851435A (en) Method for producing H-shaped steel for bridge structure by rolling special-shaped blank
CN114032460B (en) Low-yield-ratio bridge steel and production method thereof
CN113695386B (en) HRB400E high-speed wire rod threaded steel with same-circle strength fluctuation not greater than 20Mpa and production method thereof
CN109913755B (en) Peritectic steel and preparation method thereof
CN115323109B (en) Control method for continuous casting center cracks of steel billets for large-specification and high-niobium-content steel bars
MXPA96006085A (en) Procedure for the manufacture of a finished sincostura pipe in calie
CN118880191A (en) A high-strength long roll BD roll and its preparation method
CN119753510A (en) A super-large hot-rolled H-shaped steel for bridges and a production method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee