CN110184438A - A kind of manufacturing method of finishing application annealing drawing rod iron - Google Patents

A kind of manufacturing method of finishing application annealing drawing rod iron Download PDF

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Publication number
CN110184438A
CN110184438A CN201810369656.9A CN201810369656A CN110184438A CN 110184438 A CN110184438 A CN 110184438A CN 201810369656 A CN201810369656 A CN 201810369656A CN 110184438 A CN110184438 A CN 110184438A
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hardness
rod iron
annealing
steel
rolling
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CN110184438B (en
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冀鸰
胡绍鑫
许晓红
白云
黄镇
邵淑艳
李芸
孔祥伟
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Jiangyin Xingcheng Special Steel Works Co Ltd
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Jiangyin Xingcheng Special Steel Works Co Ltd
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    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
    • 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
    • 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
    • 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
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/004—Dispersions; Precipitations
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The present invention relates to finishing application annealing drawing rod irons, rod iron raw material selects hypo eutectoid low-alloy steel, the tissue of rod iron is uniform (granular) bainite, a small amount of ferrite may be contained, carbide particle is uniformly distributed in matrix, strip sulphide inculsion is distributed in tissue, the hardness of steel is 160-250HB.The bar of bainite tissue after blank rolling, softened annealing obtains the controllable annealed bars of hardness, then redrawing at aimed hardness product, the product shows good Precision Machining performance, when using the shape more demanding to chip removal such as precision cutting tool processing Small-deep Hole, annular blind hole, it is suitable when suitable cutter life is with processing isothermal annealing bar when cutter life and processing are with hardness level isothermal annealing bar, reach twice of conventional annealing technique.

Description

A kind of manufacturing method of finishing application annealing drawing rod iron
Technical field
The present invention relates to a kind of rod iron suitable for finishing and its annealing drawing process.
Background technique
As machine cut processing constantly develops to the direction of automation, high speed, precise treatment, complication, part manufacturing Quotient require the machinability of material higher and higher.And the cutting ability of material is affected by many factors, by taking steel material as an example,Plasticity strip field trash, lamellar pearlite tissue in steelBe conducive to promote to form small and short curl shape chip breaking when machining, To be easy to exclude, tool wear is reduced, reduces machined surface roughness, improves cutter life；And it selects suitablyHardnessModel Enclose also extremely important, excessive high hardness, be easy chip breaking but aggravation tool wear, hardness is too low, be easy to cut but will cause viscous knife with Not chip breaking.Therefore in the steel components that production and processing amount is big, machining shape is complicated, required precision is high, it is necessary to which it is suitable to find Hardness range and metallographic structure, to obtain optimal machining property.Such as using hypo eutectoids such as 35CrMo, 42CrMo Steel alloy production is some need to draw deep hole, boring annular blind hole, bore the complicated shapes such as Small-deep Hole, final quenching or quenched and tempered state use Precision component when because rolling, quenched or as-quenched hardness are higher, precision cutting tool can be seriously worn, therefore generally can be first Select isothermal annealing.The matching of optimal hardness and metallographic structure is obtained, raw material deep hole machining comprehensive performance is improved.
Isothermal annealed processes are by hypo eutectoid rod ironIt is heated to complete austenitizing heat preservation, then is cooled to the pearly-lustre bodily form as early as possible At temperature range, to reduce the precipitation of pro-eutectoid ferrite, and obtain the pseudopearlite tissue of the remote overbalance state of pearlite ratio (as shown in Figure 1) and suitable hardness range.But this technique requires the outfit of heat treatment producer to involve great expense, have fast quickly cooling But it is inclined to will lead to hardness such as because netted or blocky pro-eutectoid ferrite is precipitated in cooling capacity deficiency for the isothermal annealing furnace of ability Low, plasticity improves, and chip breaking and chip removal are bad when causing blind hole, deep hole machining, not only reduces production efficiency, or even will cause frequent Breaking greatly improves manufacturing cost.
Herein if there is a problem of that metallographic structure is uncontrollable, processing performance is bad using conventional soft annealing.It is sub- Eutectoid alloy rod iron material roll after because the difference of cooling velocity will form ferrite (F)+pearlite (P), bainite (B) or The compound metallographic structure of F+P+B, metallographic structure also will not change substantially after the softened annealing of bar, and F+P, F+P+B's is uneven Line and staff control can show poor machining property.Ferrite therein is easy to cause viscous because hardness is too low, good toughness Knife, not chip breaking, and it is higher to be entrained in bainite structure hardness therein, and tool wear can be made to aggravate.
Summary of the invention
It is stably and controllable, hard the technical problem to be solved by the present invention is to provide a kind of metallographic structure for the above-mentioned prior art The adjustable rod iron for being suitable for finishing is spent, not only reduces production difficulty, and stablize.
In addition, the annealing drawing process of the application design realizes by adjusting the mutual of annealing temperature and drawing sizing reduction Matching, adjust product final hardness can in a wider range.
The present invention solves the above problems used technical solution are as follows: a kind of finishing application is annealed drawing rod iron, rod iron Raw material selects hypo eutectoid low-alloy steel, and the tissue of rod iron is uniform (granular) bainite, may contain a small amount of ferrite, It is uniformly distributed carbide particle in matrix, strip sulphide inculsion is distributed in tissue, the hardness of steel is 160-250HB.This The final hardness of application rod iron product can be adjusted in aforementioned hardness range according to subsequent mechanical processing request by drawing Whole: drawing refers to that the drawing to annealing stick, the variation of hardness can be controlled by draft.Certainly, steady in order to meet production Qualitative and certain realization is controllable, and the hardness for further limiting annealing stick is 160-250HB, draft 5-20%.
The hypo eutectoid low-alloy steel of the application, chemical component are C:0.30~0.50%, Si by mass percentage: 0.10~0.50%, Mn:0.50~2.00%, S:0.020-0.15%, Cr :≤1.30%, Mo :≤0.50%, Ni :≤ 2.00%, Cu :≤0.25%, surplus is Fe and inevitable impurity element, and when production selects suitable C and other various conjunctions The proportion of gold element, it is ensured that form uniform bainite structure in subsequent rolling cooling procedure；The purpose for adding S is rear Strip sulphide inculsion is formed in the continuous operation of rolling, improves chip-breaking performance when machining.
In addition the application provides manufacture above-mentioned finishing application annealing drawing rod iron method, key step is as follows:
1) it makes steel: the above hypo eutectoid low-alloy steel ingredient being selected to design, it is cooling according to subsequent rolling bar specification, steel rolling line Ability selects suitable ingredient, it is ensured that forms uniform bainite structure in subsequent rolling cooling procedure；Add in molten steel Add S, sulfur content in finished steel is made to reach 0.020~0.15%；Molten steel is cast into steel billet by way of continuous casting or molding etc..
2) it rolls: being rolled into rod iron after heating steel billet, pass through finishing temperature, offline rhythm, blowing, water spray after rolling The cooperation of the one or multi-channel process such as mist makes bainite range of the bar cooling curve by the CCT curve of product, and under ensuring Line temperature is lower than 550 DEG C, so that it is obtained uniform bainite structure, avoids the formation of the line and staff controls such as ferrite+pearlite； Rolling after cure object is mingled with distribution in long strip in the base.
3) soft annealing: soft annealing is carried out within the temperature range of bar is 5-50 DEG C below Ac1 line, elementary organization is not Become, and there is oversaturated carbon to be precipitated in bainite matrix, carbide particle agglomeration, bar integral hardness reduce.
4) drawing: according to annealing bar initial hardness and aimed hardness, select a drawing draft of 5%-20% into Row cold drawing；Metallographic structure is basically unchanged after drawing, but because processing hardening acts on, hardness rises, plasticity decline.
Preferably, for the hardness of rod iron in the smaller range of 150-220HB, which is base after step (3) annealing It is realized in specific tissue；
It is preferably based on the hardness and draft of annealing rod iron, the hardness of rod iron is can be controlled in after step (4) drawing 160-250HB。
Compared with the prior art, the advantages of the present invention are as follows:
1) it is easy to precision machinery processing: good Precision Machining performance is shown using rod iron produced by the invention, is used When precision cutting tool processes the shape more demanding to chip removal such as Small-deep Hole, annular blind hole, cutter life and the same hardness of processing It is suitable when rank isothermal annealing bar, reach same hardness level conventional annealing technique acquisition rod iron and is finished using same tool Twice of Shi Shouming.
2) simple process, low in cost: woth no need to be equipped with expensive isothermal annealing furnace, it is only necessary to be carried out rolling the offline stage Control requirement that is cold, can then meeting raising Precision Machining performance in annealing furnace soft annealing, drawbench cold drawing, and comprehensive life It is lower to produce cost, popularization and mass production easy to accomplish.
3) metallographic structure is controllable, hardness is adjustable: when using isothermal annealed processes production, after bar hardness depends on heat treatment Pearlitic structrure ratio and pearlite lamellar spacing, and pearlitic structrure it is not only related with the primitive component of material, with heat The rapid cooling ability and heating curves for the treatment of furnace also have a much relations, when heat-treatment furnace cooling capacity deficiency, can not only be precipitated Pro-eutectoid ferrite can also be such that pearlite piece interlamellar spacing increases, to make the reduction of bar hardness, cutting ability is deteriorated, so waiting Warm annealing process is big to the metallographic structure of product, hardness control difficulty, and high production cost.
And when using present invention process production, because the temperature range of the control bainite tissue in rolling is larger, institute Obtained metallographic structure is stable and uniform；By adjusting the matching of subsequent anneal temperatures and drawing sizing reduction, stick of annealing can be made And product final hardness arbitrarily adjusts in a wider range.Such as fixed annealing temperature can be used, what is obtained stable moves back Fiery hardness obtains different hardness ranges subsequently through adjustment drawing deformation amount；Fixed drawing deformation amount can also be selected, is led to Passage annealing temperature obtains different hardness ranges before crossing adjustment, considerably increases the flexibility of technique in this way.
4) surface quality is good: compared with isothermal annealing, the invention heating temperature is low, surface-carburized layer is shallow, and through drawing Dimensional accuracy and finish are higher afterwards.
5) energy conservation and environmental protection: compared with isothermal annealed processes, the invention annealing heating temperature is lower, has energy-saving and environment-friendly life Production advantage.
Detailed description of the invention
Fig. 1 is high power schematic diagram (100 μ of the 42CrMo class steel disc shape pearlitic structrure produced using isothermal annealed processes m)。
Fig. 2 is low power schematic diagram (20 μ of the 42CrMo class steel disc shape pearlitic structrure produced using isothermal annealed processes m)；
Fig. 3 is the high power schematic diagram (100 μm) using annealing of the present invention+drawing process production 42CrMo class structure of steel；
Fig. 4 is the low power schematic diagram (20 μm) using annealing of the present invention+drawing process production 42CrMo class structure of steel.
Specific embodiment
Embodiment is enumerated below in conjunction with attached drawing further to retouch annealing cold drawing stick production method of the present invention work in detail It states.
Embodiment 1
The chemical component of material selection 42CrMo steel, steel meets professional standard with regard to the smelting specification of the steel grade, belongs to Asia Eutectoid low-alloy steel, chemical component are not the design points of the application, are possible to take out of because limiting chemical component to reduce Misunderstand, the present embodiment is underground to the chemical component, and those skilled in the art can refer to industry standard standard with regard to the steel grade:
1) it makes steel: being made steel using electric furnace+LF furnace+VD vacuum outgas+continuous casting mode, the S in molten steel is contained in steelmaking process Amount is adjusted, and for final stable content 0.030%, higher S can make rod iron form strip sulphur in the subsequent operation of rolling Compound is mingled with, and reduces toughness, improves chip-breaking performance when machining.
2) roll: continuous casting material is rolled into 35mm specification bar, offline to obtain faster cooling velocity through too long cold bed (1 DEG C/s), it is cooling, the metallographic structure based on bainite is formed it into, netted or granular ferrite and pearlite is avoided to be precipitated, Offline hardness reaches 320HB or so；
3) it anneals: bar is annealed under 700 DEG C of heating temperatures, hardness is 180-190HB after annealing；
4) bar drawing: is drawn to by 35mm by 33mm specification, draft 5.7%, bar using conventional drawing process Final hardness reaches 220-230HB；
5) Precision Machining: steel carry out Precision Machining under as-drawn of annealing, and chip breaking can expire in small and short curly Sufficient deep hole, boring annular blind hole bore the Precision Machinings such as Small-deep Hole, the service life and the same tool sharpening of use of process tool It is suitable with the cutter life of hardness level isothermal annealing bar.
Embodiment 2
Material selection 40Cr steel, the chemical component of steel meet specification of the standard to the grade of steel of GB, belong to the low conjunction of hypo eutectoid Jin Gang, specific production stage are as follows:
1) it makes steel: being made steel using electric furnace/converter+LF furnace+continuous casting mode, in molten steel plus sulphur is to 0.035%, makes rod iron rear Strip sulphide inculsion is formed in the continuous operation of rolling, reduces toughness, improves chip-breaking performance when machining.
2) it rolls: continuous casting material is rolled into 24mma specification bar, it is air-cooled to obtain faster cooling velocity (3 when offline DEG C/s), cooling velocity passes through the bainite range of CCT curve, and ensures offline temperature lower than 550 DEG C, and acquisition is with bainite Main metallographic structure, while there is also a small amount of ferrite in tissue, ferritic volume parts are 4% or so, hard after offline Degree reaches 270-285HB；
3) it anneals: bar being annealed at a temperature of 690 DEG C, hardness reaches 175-185HB or so after annealing；
4) drawing: bar is drawn to by 22mm specification using conventional drawing process, draft 8.3%, bar is finally hard Degree reaches 205-215HB；
5) Precision Machining: steel carry out Precision Machining in annealing as-drawn, and chip breaking can meet in small and short curly The Precision Machinings such as deep hole, blind hole, the service life and the same tool sharpening of use of process tool are the same as hardness level conventional annealing work Skill obtains twice of the service life of rod iron.
In addition to the implementation, all to use equivalent transformation or equivalent replacement the invention also includes there is an other embodiments The technical solution that mode is formed should all be fallen within the scope of the hereto appended claims.

Claims (6)

  1. The drawing rod iron 1. a kind of finishing application is annealed, it is characterised in that: rod iron raw material selects hypo eutectoid low-alloy steel, rod iron Tissue is uniform (granular) bainite, may contain a small amount of ferrite, be uniformly distributed carbide particle in matrix, organize Middle distribution strip sulphide inculsion, the hardness of steel are 160-250HB.
  2. The drawing rod iron 2. finishing application according to claim 1 is annealed, it is characterised in that: the hardness of the steel product It is to be obtained by control draft, the hardness for stick of annealing is 160-250HB, and draft is by carrying out drawing to annealing stick 5-20%.
  3. 3. rod iron according to claim 1, it is characterised in that: the hypo eutectoid low-alloy steel, chemical component C: 0.30~0.50%, Si:0.10~0.50%, Mn:0.50~2.00%, S:0.020~0.15%, Cr :≤1.30%, Mo: ≤ 0.50%, Ni :≤2.00%, Cu :≤0.25%, surplus is Fe and inevitable impurity element.According to rolling when production Cooling capacity after specification size and rolling, selects suitable alloying element to match, it is ensured that be formed in subsequent rolling cooling procedure Uniform bainite structure；The purpose for adding S is the formation strip sulphide inculsion in the subsequent operation of rolling, is improved mechanical Chip-breaking performance when processing.
  4. The drawing rod iron method 4. finishing application described in a kind of manufacturing claims 1 is annealed, it is characterised in that: key step is such as Under:
    1) it makes steel: selecting the design of hypo eutectoid low-alloy steel ingredient, when steel-making adds S in molten steel, makes sulfur content in finished steel Reach 0.020~0.15%, the purpose is to form strip sulphide inculsion in the subsequent operation of rolling, when improving machining Chip-breaking performance；
    2) it rolls: being matched after rod iron rolling by finishing temperature, offline rhythm, blowing, one or multi-channel process in atomized water spray Conjunction makes bainite range of the bar cooling curve by CCT curve, and ensures that offline temperature lower than 550 DEG C, forms it into uniformly The ferrite of consistent bainite structure or bainite structure+a small amount of, avoids the formation of ferrite+pearlite line and staff control, simultaneously Strip sulphide inculsion is distributed after rolling in tissue；
    3) soft annealing: carrying out soft annealing within the temperature range of bar is 5-50 DEG C below Ac1 line, elementary organization is constant, but Oversaturated carbon is precipitated in bainite matrix, carbide particle agglomeration, bar integral hardness reduce；
    4) drawing: according to annealing bar initial hardness and aimed hardness, aimed hardness is controlled according to drawing draft, selectes 5%- A 20% drawing draft carries out cold drawing；Metallographic structure is basically unchanged after drawing, but because processing hardening acts on, in hardness It rises, plasticity decline.
  5. The drawing rod iron method 5. finishing application according to claim 4 is annealed, it is characterised in that: after step (3) annealing The hardness of rod iron can reach in the smaller range of 150-220HB.
  6. The drawing rod iron method 6. finishing application according to claim 4 is annealed, it is characterised in that: after step (4) drawing The hardness of rod iron can be controlled according to the size of draft in 160-250HB.
CN201810369656.9A 2018-04-24 2018-04-24 Manufacturing method of annealing drawing steel bar for finish machining Active CN110184438B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110951957A (en) * 2019-11-13 2020-04-03 江阴康瑞成型技术科技有限公司 Non-magnetic stainless steel bar for low-permeability microelectronic product and production process thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1532296A (en) * 2003-03-19 2004-09-29 潘龙修 Process for producing supper fine refined steel
CN106544494A (en) * 2017-01-18 2017-03-29 中钢集团郑州金属制品研究院有限公司 A kind of online soft annealing method suitable for 1Cr17Ni2 rustless steel cold pull wires

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1532296A (en) * 2003-03-19 2004-09-29 潘龙修 Process for producing supper fine refined steel
CN106544494A (en) * 2017-01-18 2017-03-29 中钢集团郑州金属制品研究院有限公司 A kind of online soft annealing method suitable for 1Cr17Ni2 rustless steel cold pull wires

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110951957A (en) * 2019-11-13 2020-04-03 江阴康瑞成型技术科技有限公司 Non-magnetic stainless steel bar for low-permeability microelectronic product and production process thereof

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