CN110016620A - A kind of header bolt high-low temperature resistant ferrite material and its production technology - Google Patents
A kind of header bolt high-low temperature resistant ferrite material and its production technology Download PDFInfo
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- CN110016620A CN110016620A CN201910454211.5A CN201910454211A CN110016620A CN 110016620 A CN110016620 A CN 110016620A CN 201910454211 A CN201910454211 A CN 201910454211A CN 110016620 A CN110016620 A CN 110016620A
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- low temperature
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/32—Soft annealing, e.g. spheroidising
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- 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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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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)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention provides a kind of header bolt high-low temperature resistant ferrite material and its production technology, the high-low temperature resistant ferrite material is by following weight percent at being grouped as: C:0.17 ~ 0.25wt%, Mn:0.40 ~ 0.80wt%, 0 < Si≤0.4wt%, 0 < P≤0.025wt%, 0 < S≤0.025wt%, Cr:1.20 ~ 1.50wt%, 0 < Ni≤0.60wt%, Mo:0.55 ~ 0.80wt%, 0 < Al≤0.030t%, 0 < V≤0.030wt%, surplus are Fe and inevitable impurity.The ferrite material plasticity index with higher, elongation, the contraction percentage of area, in cold plastic deformation, the resistance of deformation of material is small, and work hardening rate is low, and the yield tensile ratio value of material is small, and hardness is appropriate.
Description
Technical field
The invention belongs to metallurgical material technical fields, and in particular, to a kind of header bolt high-low temperature resistant ferrite material
Material and its production technology.
Background technique
Ferritic stainless steel because have good formability, excellent anticorrosion stress-resistant and high temperature oxidation resistance and it is low at
This advantages that, the deep favor by researcher and industry；And ferritic stainless steel has suitable thermal coefficient and thermal expansion coefficient,
It is suitably applied the occasion of heat exchange and thermal cycle.
High temperature resistant ferrite material needs the product under 700 DEG C of high-temperature area continuous works not deform and can be used for cold
The material of extruding.
Existing domestic similar such material wire surface high intensity, non-metallic inclusion and surface defect and decarburization situation
Difference is only used for machining industry and is processed to remove surface defect and decarburized layer, and metal material streamline meeting after machining
It is cut off, by still having risk of breakage after post-processing, often the demanding connecting component of safety coefficient will not use such processing
Technique.
For high temperature resistant ferrite material, the Chinese patent of Publication No. CN105200330A provides a kind of high temperature resistant iron
The chemical component mass percent of ferritic stainless steel and its manufacturing method, the steel is as follows: C≤0.025%, N≤0.015%, Si:
0.1 ~ 1.2%, Mn:1.0 ~ 2.0%, Cr:18.0 ~ 24.0%, P≤0.03%, S≤0.002%, Ni≤0.3%, Mo:1.5 ~ 2.5%, W:
0.3 ~ 2.0%, 4 (C+N)≤Ti≤0.2%, 10 (C+N)+0.30%≤Nb≤0.80%, and must satisfy: C+N≤0.035%, 2%
≤ Mo+W≤3.5%, Nb+W+Mo≤4.0%, remaining is Fe and inevitable impurity element, impurity element total amount < 0.05%.
The elevated temperature strength and stable high-temperature strength for the high temperature resistant ferritic stainless steel that the present invention obtains are significantly improved, and specifically exist
High-temperature yield strength 0.2 >=20MPa of σ after 0.2 >=24MPa of high-temperature yield strength σ at 1050 DEG C, 1050 DEG C of timeliness 100h is suitble to
It applies and is reaching 1000 DEG C or more of application field, such as automobile exhaust system high temperature end pieces manifold using temperature.However,
High temperature resistant ferritic stainless steel and its manufacturing method provided by the patent still have risk of breakage in subsequent processes.
Summary of the invention
Above-mentioned to solve the problems, such as, the purpose of the present invention is to provide a kind of header bolt high-low temperature resistant ferrites
Material and its production technology, the ferrite material plasticity index with higher, elongation, the contraction percentage of area, in cold plasticity
In deformation, the resistance of deformation of material is small, and work hardening rate is low, and the yield tensile ratio value of material is small, and hardness is appropriate.
In order to achieve the above objectives, the technical scheme is that
A kind of header bolt high-low temperature resistant ferrite material, the high-low temperature resistant ferrite material is by following weight percent
At being grouped as: C:0.17 ~ 0.25wt%, Mn:0.40 ~ 0.80wt%, 0 < Si≤0.4wt%, 0 < P≤0.025wt%, 0 < S≤
0.025wt%, Cr:1.20 ~ 1.50wt%, 0 < Ni≤0.60wt%, Mo:0.55 ~ 0.80wt%, 0 < Al≤0.030t%, 0 < V≤
0.030wt%, surplus are Fe and inevitable impurity.
Further, in the high-low temperature resistant ferrite material inner clip within high-low temperature resistant ferrite material surface 2mm
Size≤0.15Lm of sundries.
Further, B class sundries≤0.5 grade in the high-low temperature resistant ferrite material, type impurity≤1 grade D, field trash
Summation≤3 grade.
Meanwhile the present invention also provides a kind of header bolt production technology of high-low temperature resistant ferrite material, the productions
Technique includes the following steps:
One, base material is processed
1) furnace melting:
Raw material iron ore is added and refines molten steel, sulphur maximum level is 0.025wt%；
2) external refining:
Excessive carbon and other impurities oxidation are removed with oxidant at high temperature, control field trash, and press in steelmaking process
Chromium, nickel, molybdenum, aluminium, vanadium are added according to proportion, adjusts the ingredient of molten steel；
3) it casts:
Molten steel is poured into conticaster and becomes solid forms；
4) big stick-means of intimidation cogging controls billet size, length in the operation of rolling；
5) wire rod heats, rolls to obtain base material:
Heating furnace remaining oxygen is controlled, guarantees that decarburization is normal, control bus size is in the desired margin of tolerance in the operation of rolling；
Two, wire rod is processed
1. spheroidizing is handled, gained base material is subjected to spheroidizing processing；
2. the base material after nodularization is carried out drawing, obtains screw line, subtract face shrinking percentage≤30% for the first time by first of drawing；
3. spheroidizing is handled, the screw line after first of drawing process is subjected to spheroidizing processing；
4. finish draw (second drawing):
Subtract face shrinking percentage≤1%, 550 ~ 650MPa of tensile strength for the second time；
5. completing, the header bolt high-low temperature resistant ferrite material is obtained.
Further, the base material shape is disk.
Further, 1. 3. the spheroidizing processing is respectively isothermal spheroidizing processing, specific work to step with step
Skill is as follows: isothermal spheroidizing temperature are as follows: and 760 ~ 770 DEG C, 3 ~ 4h is kept the temperature, is furnace-cooled to 660 ~ 680 DEG C, 4 ~ 6h of isothermal to 500 DEG C,
It comes out of the stove.
Further, step is 3. after spheroidizing processing, the tensile strength of screw line: 550 ~ 650MPa, hardness:
160-180HV。
Further, header bolt high-low temperature resistant ferrite material tensile strength: 600 ~ 700MPa, section shrinkage
Rate: 40%, hardness: 75 ~ 95HRB.
The beneficial effects of the present invention are:
The high-low temperature resistant ferrite material, plasticity index with higher, elongation, the contraction percentage of area；In cold plastic deformation
In, the resistance of deformation of material is small, and work hardening rate is low, and the yield tensile ratio of material value is small, and hardness is appropriate, in -50 DEG C of low temperature and
700 DEG C of high temperature still have good cutting processing performance；
The defects of surface is flawless, the smooth rounding in surface, and no concave-convex folds, scabs, point；
Field trash is one of the main reason for causing cold heading cracking, and inclusion particle is bigger, more easy to crack, away from surface 2mm with
Interior inclusion size should be not more than 0.15Lm.It is generally believed that B class (aluminium oxide) and (the spherical oxidation of C class in non-metallic inclusion
Object) field trash harm maximum.For header bolt provided by the present invention in high-low temperature resistant ferrite material, B type impurity is little
In 0.5 grade, D type impurity is not more than 1 grade, other field trashes are not more than 2 grades, and field trash summation is not more than 3 grades.
Header bolt high-low temperature resistant ferrite material tensile strength: 600 ~ 700MPa, the contraction percentage of area: 40%, firmly
Degree: 75 ~ 95HRB.
Specific embodiment
Embodiment 1
A kind of header bolt high-low temperature resistant ferrite material of the present invention, the high-low temperature resistant ferrite material is by as follows
Weight percent at being grouped as: C:0.17 ~ 0.25wt%, Mn:0.40 ~ 0.80wt%, 0 < Si≤0.4wt%, 0 < P≤
0.025wt%, 0 < S≤0.025wt%, Cr:1.20 ~ 1.50wt%, 0 < Ni≤0.60wt%, Mo:0.55 ~ 0.80wt%, 0 < Al≤
0.030t%, 0 < V≤0.030wt%, surplus are Fe and inevitable impurity.
Further, in the high-low temperature resistant ferrite material inner clip within high-low temperature resistant ferrite material surface 2mm
Size≤0.15Lm of sundries.
Further, B class sundries≤0.5 grade in the high-low temperature resistant ferrite material, type impurity≤1 grade D, field trash
Summation≤3 grade.
Meanwhile the present invention also provides a kind of header bolt production technology of high-low temperature resistant ferrite material, the productions
Technique includes the following steps:
One, base material is processed
1) furnace melting:
Raw material iron ore is added and refines molten steel (guaranteeing that residual elements are qualified, tapping confirmation chemical component meets the requirements), sulphur is maximum
Content is 0.025wt%, and cracking skids when can improve subsequent cold-heading thread rolling；
2) external refining:
Excessive carbon and other impurities oxidation are removed with oxidant at high temperature, control field trash, and press in steelmaking process
Chromium, nickel, molybdenum, aluminium, vanadium are added according to proportion, adjusts the ingredient of molten steel；
(key points for operation: requiring adjustment chemical component to target according to material)
Wherein, oxidant is oxygen or iron oxide.
3) it casts:
Molten steel is poured into conticaster and becomes solid forms；
(key points for operation: guaranteeing that internal soundness need to control alien material and fall into)
4) big stick-means of intimidation cogging controls billet size, length in the operation of rolling；
Wherein, the major function of blooming mill is back and forth rolled to the blank after heating stove heating, is rolled into certain size
Intermediate blank is used for Continuous mill train.
5) wire rod heats, rolls to obtain base material, and the base material shape is disk:
Heating furnace remaining oxygen is controlled, guarantees that decarburization is normal, control bus size is in the desired margin of tolerance in the operation of rolling；
Control for heating furnace remaining oxygen installs an oxygen analyzer in heating-furnace tail preheating section (700 DEG C of left-right positions),
Test point is selected in furnace tail close to flue furnace wall side, selects direct insertion oxygen analyser.Its installation point environment temperature is 0 ~ 100 DEG C, inspection
700 ~ 900 DEG C of measuring point environment temperature.
Two, wire rod is processed
1. spheroidizing is handled, gained base material is subjected to spheroidizing processing；
Spheroidizing processing is that isothermal spheroidizing is handled, isothermal spheroidizing temperature are as follows: 760 ~ 770 DEG C, keeps the temperature 3 ~ 4h, furnace is cold
To 660 ~ 680 DEG C, 4 ~ 6h of isothermal to 500 DEG C, come out of the stove.
2. the base material after nodularization is carried out drawing, obtains screw line, subtract face shrinking percentage≤30% for the first time by first of drawing；
3. spheroidizing is handled, the screw line after first of drawing process is subjected to spheroidizing processing, after spheroidizing processing,
The tensile strength of screw line: 550 ~ 650MPa, hardness: 160-180HV；
Spheroidizing processing is that isothermal spheroidizing is handled, isothermal spheroidizing temperature are as follows: 760 ~ 770 DEG C, keeps the temperature 3 ~ 4h, furnace is cold
To 660 ~ 680 DEG C, 4 ~ 6h of isothermal to 500 DEG C, come out of the stove.
Isothermal spheroidizing, plasticity is good, and cold extrusion cold forming effect is obvious.
4. finish draw (second drawing):
Subtract face shrinking percentage≤1%, 550 ~ 650MPa of tensile strength for the second time；
It is uneven in order to solve epithelium after wire surface nodularization, subtract face shrinking percentage for the second time no more than 1%, tensile strength 550 ~
650MPa。
According to iron carbon regime theory, lamellar pearlite is in insulating process, due to its radius of curvature difference, dissolution everywhere
Degree is different, causes Carbon diffusion, has broken the balance of concentration of carbon, as a result leads to the nodularization of cementite, has obtained after finish draw good
The tissue of cold-extruded performance, press pressure are stablized, cold extrusion dimensionally stable.
5. completing, the header bolt high-low temperature resistant ferrite material is obtained.
Header bolt high-low temperature resistant ferrite material tensile strength: 600 ~ 700MPa, the contraction percentage of area: 40%, firmly
Degree: 75 ~ 95HRB.
It should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to the technology of invention
Scheme is modified or replaced equivalently, and without departing from the range of technical solution of the present invention, should all be covered in power of the invention
In sharp claimed range.
Claims (8)
1. a kind of header bolt high-low temperature resistant ferrite material, which is characterized in that the high-low temperature resistant ferrite material is by such as
Lower weight percent at being grouped as: C:0.17 ~ 0.25wt%, Mn:0.40 ~ 0.80wt%, 0 < Si≤0.4wt%, 0 < P≤
0.025wt%, 0 < S≤0.025wt%, Cr:1.20 ~ 1.50wt%, 0 < Ni≤0.60wt%, Mo:0.55 ~ 0.80wt%, 0 < Al≤
0.030t%, 0 < V≤0.030wt%, surplus are Fe and inevitable impurity.
2. header bolt according to claim 1 high-low temperature resistant ferrite material, which is characterized in that apart from resistance to height
Size≤0.15Lm of high-low temperature resistant ferrite material inclusion within warm ferrite material surface 2mm.
3. header bolt according to claim 1 high-low temperature resistant ferrite material, which is characterized in that the high-low temperature resistant
B class sundries≤0.5 grade in ferrite material, type impurity≤1 grade D, field trash summation≤3 grade.
4. a kind of production technology of header bolt as claimed in any one of claims 1 to 3 high-low temperature resistant ferrite material,
It is characterized in that, the production technology includes the following steps:
One, base material is processed
1) furnace melting:
Raw material iron ore is added and refines molten steel, sulphur maximum level is 0.025wt%；
2) external refining:
Excessive carbon and other impurities oxidation are removed with oxidant at high temperature, control field trash, and press in steelmaking process
Chromium, nickel, molybdenum, aluminium, vanadium are added according to proportion, adjusts the ingredient of molten steel；
3) it casts:
Molten steel is poured into conticaster and becomes solid forms；
4) big stick-means of intimidation cogging controls billet size, length in the operation of rolling；
5) wire rod heats, rolls to obtain base material:
Heating furnace remaining oxygen is controlled, guarantees that decarburization is normal, control bus size is in the desired margin of tolerance in the operation of rolling；
Two, wire rod is processed
1. spheroidizing is handled, gained base material is subjected to spheroidizing processing；
2. the base material after nodularization is carried out drawing, obtains screw line, subtract face shrinking percentage≤30% for the first time by first of drawing；
3. spheroidizing is handled, the screw line after first of drawing process is subjected to spheroidizing processing；
4. finish draw (second drawing):
Subtract face shrinking percentage≤1%, 550 ~ 650MPa of tensile strength for the second time；
5. completing, the header bolt high-low temperature resistant ferrite material is obtained.
5. the header bolt according to claim 4 production technology of high-low temperature resistant ferrite material, which is characterized in that institute
Stating base material shape is disk.
6. the header bolt according to claim 4 production technology of high-low temperature resistant ferrite material, which is characterized in that step
Suddenly 1. 3. the spheroidizing processing is respectively isothermal spheroidizing processing with step, the specific process is as follows: isothermal spheroidizing
Temperature are as follows: 760 ~ 770 DEG C, keep the temperature 3 ~ 4h, be furnace-cooled to 660 ~ 680 DEG C, 4 ~ 6h of isothermal to 500 DEG C, come out of the stove.
7. the header bolt according to claim 4 production technology of high-low temperature resistant ferrite material, which is characterized in that step
Suddenly 3. after the spheroidizing processing, the tensile strength of screw line: 550 ~ 650MPa, hardness: 160-180HV.
8. the header bolt according to claim 4 production technology of high-low temperature resistant ferrite material, which is characterized in that institute
Header bolt high-low temperature resistant ferrite material tensile strength: 600 ~ 700MPa is stated, the contraction percentage of area: 40%, hardness: 75 ~
95HRB。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910454211.5A CN110016620A (en) | 2019-05-29 | 2019-05-29 | A kind of header bolt high-low temperature resistant ferrite material and its production technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910454211.5A CN110016620A (en) | 2019-05-29 | 2019-05-29 | A kind of header bolt high-low temperature resistant ferrite material and its production technology |
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| CN110016620A true CN110016620A (en) | 2019-07-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048604A (en) * | 2020-07-30 | 2020-12-08 | 四川六合特种金属材料股份有限公司 | Preparation process of low-alloy high-temperature bolt |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101098979A (en) * | 2005-02-16 | 2008-01-02 | 新日本制铁株式会社 | Hot rolled wire material excellent in cold forging property after spheroidizing treatment, spheroidizing-annealed steel wire having excellent cold forging property, and method for production thereof |
| CN103003461A (en) * | 2010-08-30 | 2013-03-27 | 株式会社神户制钢所 | Steel wire material for high-strength spring which has excellent wire-drawing properties and process for production thereof, and high-strength spring |
| CN103447348A (en) * | 2013-07-25 | 2013-12-18 | 张家港市胜达钢绳有限公司 | Manufacturing method of stainless steel wire |
-
2019
- 2019-05-29 CN CN201910454211.5A patent/CN110016620A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101098979A (en) * | 2005-02-16 | 2008-01-02 | 新日本制铁株式会社 | Hot rolled wire material excellent in cold forging property after spheroidizing treatment, spheroidizing-annealed steel wire having excellent cold forging property, and method for production thereof |
| CN103003461A (en) * | 2010-08-30 | 2013-03-27 | 株式会社神户制钢所 | Steel wire material for high-strength spring which has excellent wire-drawing properties and process for production thereof, and high-strength spring |
| CN103447348A (en) * | 2013-07-25 | 2013-12-18 | 张家港市胜达钢绳有限公司 | Manufacturing method of stainless steel wire |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048604A (en) * | 2020-07-30 | 2020-12-08 | 四川六合特种金属材料股份有限公司 | Preparation process of low-alloy high-temperature bolt |
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