CN106676393A - Technology for producing fastener for aerospace - Google Patents
Technology for producing fastener for aerospace Download PDFInfo
- Publication number
- CN106676393A CN106676393A CN201710086471.2A CN201710086471A CN106676393A CN 106676393 A CN106676393 A CN 106676393A CN 201710086471 A CN201710086471 A CN 201710086471A CN 106676393 A CN106676393 A CN 106676393A
- Authority
- CN
- China
- Prior art keywords
- wire
- rod
- roll
- rod roll
- steel billet
- 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.)
- Pending
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Classifications
-
- 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
- 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
- C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with 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
- C22C38/60—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
- C21D2211/009—Pearlite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Forging (AREA)
Abstract
The invention discloses a technology for producing a fastener for aerospace. A coil rod is prepared through steel blank preparation, steel blank heating, and air inlet pressure and clamping force adjustment of a clamping roller, after cooling, a wire coil rod is obtained, through annealing, acid pickling, wire pulling, forging rolling or tapping, a formed product is formed, and finally through heat treatment and surface coating treatment, packaging is carried out. The fastener obtained through the production technology can be widely applied to special industries of the nuclear power industry, the high-speed rail transport industry, the car transport industry, the aerospace industry, the petrochemical industry and the like, the properties of high hardness, high strength, high corrosion resistance, oxidability resistance and the like are achieved, the production cost is reduced, work efficiency is improved, and batched production can be achieved.
Description
Technical field
The present invention relates to securing member production, more particularly to a kind of technique for producing Aero-Space securing member.
Background technology
Securing member is typically used in every field as a kind of common part, but when fastener application is to special industry
When, such as nuclear power industry, high ferro carrier, automobile high to performance requirements such as its hardness, intensity, corrosion resistance, non-oxidizabilitys
Carrier, Aero-Space industry, petroleum chemical industry etc..In prior art, securing member is usually produced in batches, existing life
The securing member that production. art will produce the high performance requirements of aforementioned special industry is extremely difficult, while production cost is high, work
Inefficiency.
The content of the invention
In view of the shortcomings of the prior art, the purpose of the present invention is that there is provided a kind of production Aero-Space fastening
The technique of part, can be widely applied to nuclear power industry, high ferro carrier, Automobile Transportation industry, Aero-Space industry, oil
The special industries such as industrial and commercial bank's industry, with high rigidity, high intensity, the performance such as corrosion resistance is strong, non-oxidizability is strong, reduce and produce into
This, improves work efficiency, can produce in batches.
To achieve these goals, the technical solution used in the present invention is such：One kind production Aero-Space fastening
The technique of part, it is characterised in that comprise the steps：
（1）It is prepared by steel billet：Prepare raw material smelting molten steel, with the molten steel steel billet is casting continuously to form；Between each component of the steel billet
Mass parts are as follows：0.5 ~ 1 part of C, 0.3 ~ 0.5 part of Si, 0.8 ~ 1 part of Mn, 0 ~ 0.05 part of P, 0 ~ 0.05 part of S, Cr 0.1 ~ 0.5
The Fe and impurity of part, 0.1 ~ 0.2 part of Ni and surplus；
（2）Heating steel billet：By heating steel billet to 900 ~ 1000 DEG C, start rolling temperature is 900 ~ 1000 DEG C on high line roughing mill；
（3）It is prepared by wire rod：Milling train, pre-finishing mill, finishing mill, reducing sizing mill are processed into wire rod and spin in the high lines of steel billet Jing
Volume, laying temperature is controlled at 650 ~ 700 DEG C；
（4）The admission pressure for adjusting pinch roll is 7 ~ 8bar, and chucking power is 5 ~ 7bar；
（5）Wire-rod roll：The roller repairing of wire rod is carried out using Stelmor controlled cooling line so that the wire rod temperature after cooling is less than
Or equal to 250 DEG C, obtain wire-rod roll；
（6）Wire-rod roll is put in heating furnace and is heated slowly to 600 ~ 1000 DEG C, and keep 5 ~ 10h, then wire-rod roll is existed
Slow cooling takes out wire-rod roll and naturally cools to room temperature to after less than 300 DEG C from heating furnace in heating furnace；
（7）By step（6）In wire-rod roll be put into room temperature, concentration be 10 ~ 20% hydrochloric acid solution in 20 ~ 40min, it is clear with clear water
Corrosion product in desalinization of soil by flooding or leaching sour water, in then successively the wire-rod roll for having processed being put into into oxalic acid liquid, phosphoric acid saline solution epithelium is formed
Secondary use clean water afterwards, and the wire-rod roll for having cleaned and metallic soap are reacted to form metallic soap layer；
（8）By step（7）The wire-rod roll that middle process is completed first passes through continuous way wire drawing machine and is slightly taken out and annealed, then by taking out
Line machine is cold drawn to required line footpath；
（9）By the forged shape for reaching semi-finished product of wire-rod roll, length and thickness, then semi-finished product are rolled over system or tapping to reach
To required screw thread, products formed is formed；
（10）By step（9）In products formed be heated to 500 ~ 1000 DEG C after carry out Quenching Treatment, carry out height at 200 ~ 400 DEG C
Temperature tempering is simultaneously rapidly cooled to 30 ~ 40 DEG C；
（11）Surface treatment：A protective layer is covered with the surface of products formed, and carries out packing process.
As a kind of preferred version, the step（5）In when being cooled down using Stelmor controlled cooling line, control wire rod
Cooling rate before early pearlitic transformation is 10 DEG C/s, and at 650 DEG C, cooling rate is 2 DEG C/s to pearlitic transformation temperature control after phase transformation.
As a kind of preferred version, the step（7）In metallic soap be soda soap.
As a kind of preferred version, the step（9）In be forged to cold forging or heat between forge.
As a kind of preferred version, the step（10）Middle Quenching Treatment is using water, oil or air hardening.
As a kind of preferred version, the step（11）Middle surface treatment is using plating, galvanizing by dipping or mechanical plating.
Compared with prior art, beneficial effects of the present invention：The securing member that the production technology of the present invention is obtained can be extensive
The special industries such as nuclear power industry, high ferro carrier, Automobile Transportation industry, Aero-Space industry, petroleum chemical industry are applied to,
With high rigidity, high intensity, the performance such as corrosion resistance is strong, non-oxidizability is strong, production cost is reduced, improves work efficiency,
Can produce in batches.
Specific embodiment
With reference to specific embodiment, the invention will be further described.Following examples are only used for clearly illustrating
Technical scheme, and can not be limited the scope of the invention with this.
Embodiment 1：
A kind of technique for producing Aero-Space securing member, it is characterised in that comprise the steps：
（1）It is prepared by steel billet：Prepare raw material smelting molten steel, with the molten steel steel billet is casting continuously to form；Between each component of the steel billet
Mass parts are as follows：0.5 part of C, 0.3 part of Si, 0.8 part of Mn, 0 part of P, 0 part of S, 0.1 part of Cr, 0.1 part of Ni and surplus
Fe and impurity；
（2）Heating steel billet：By heating steel billet to 900 DEG C, start rolling temperature is 900 DEG C on high line roughing mill；
（3）It is prepared by wire rod：Milling train, pre-finishing mill, finishing mill, reducing sizing mill are processed into wire rod and spin in the high lines of steel billet Jing
Volume, laying temperature is controlled at 650 DEG C；
（4）The admission pressure for adjusting pinch roll is 7bar, and chucking power is 5bar；
（5）Wire-rod roll：The roller repairing of wire rod is carried out using Stelmor controlled cooling line so that the wire rod temperature after cooling is less than
Or equal to 250 DEG C, obtain wire-rod roll；
（6）Wire-rod roll is put in heating furnace and is heated slowly to 600 DEG C, and keep 5h, then by wire-rod roll in heating furnace
Slow cooling takes out wire-rod roll and naturally cools to room temperature to after less than 300 DEG C from heating furnace；
（7）By step（6）In wire-rod roll be put into 20min in the hydrochloric acid solution that room temperature, concentration are 10%, use clean water hydrochloric acid
Corrosion product in water, forms secondary after epithelium in then successively the wire-rod roll for having processed being put into into oxalic acid liquid, phosphoric acid saline solution
With clean water, and the wire-rod roll for having cleaned and metallic soap are reacted to form metallic soap layer；
（8）By step（7）The wire-rod roll that middle process is completed first passes through continuous way wire drawing machine and is slightly taken out and annealed, then by taking out
Line machine is cold drawn to required line footpath；
（9）By the forged shape for reaching semi-finished product of wire-rod roll, length and thickness, then semi-finished product are rolled over system or tapping to reach
To required screw thread, products formed is formed；
（10）By step（9）In products formed be heated to 500 DEG C after carry out Quenching Treatment, carry out high tempering simultaneously at 200 DEG C
It is rapidly cooled to 30 DEG C；
（11）Surface treatment：A protective layer is covered with the surface of products formed, and carries out packing process.
The mass parameter of the sample that the present embodiment is obtained is：Grain size 12-13 level, yield strength 420MPa-480MPa resists
Tensile strength 560MPa-650MPa, percentage elongation 25-35%.
Embodiment 2：
A kind of technique for producing Aero-Space securing member, it is characterised in that comprise the steps：
（1）It is prepared by steel billet：Prepare raw material smelting molten steel, with the molten steel steel billet is casting continuously to form；Between each component of the steel billet
Mass parts are as follows：0.75 part of C, 0.4 part of Si, 0.9 part of Mn, 0.025 part of P, 0.025 part of S, 0.3 part of Cr, 0.15 part of Ni
And the Fe and impurity of surplus；
（2）Heating steel billet：By heating steel billet to 950 DEG C, start rolling temperature is 950 DEG C on high line roughing mill；
（3）It is prepared by wire rod：Milling train, pre-finishing mill, finishing mill, reducing sizing mill are processed into wire rod and spin in the high lines of steel billet Jing
Volume, laying temperature is controlled at 675 DEG C；
（4）The admission pressure for adjusting pinch roll is 7.5bar, and chucking power is 6bar；
（5）Wire-rod roll：The roller repairing of wire rod is carried out using Stelmor controlled cooling line so that the wire rod temperature after cooling is less than
Or equal to 250 DEG C, obtain wire-rod roll；
（6）Wire-rod roll is put in heating furnace and is heated slowly to 800 DEG C, and keep 7.5h, then by wire-rod roll in heating furnace
Interior slow cooling takes out wire-rod roll and naturally cools to room temperature to after less than 300 DEG C from heating furnace；
（7）By step（6）In wire-rod roll be put into 30min in the hydrochloric acid solution that room temperature, concentration are 15%, use clean water hydrochloric acid
Corrosion product in water, forms secondary after epithelium in then successively the wire-rod roll for having processed being put into into oxalic acid liquid, phosphoric acid saline solution
With clean water, and the wire-rod roll for having cleaned and metallic soap are reacted to form metallic soap layer；
（8）By step（7）The wire-rod roll that middle process is completed first passes through continuous way wire drawing machine and is slightly taken out and annealed, then by taking out
Line machine is cold drawn to required line footpath；
（9）By the forged shape for reaching semi-finished product of wire-rod roll, length and thickness, then semi-finished product are rolled over system or tapping to reach
To required screw thread, products formed is formed；
（10）By step（9）In products formed be heated to 750 DEG C after carry out Quenching Treatment, carry out high tempering simultaneously at 300 DEG C
It is rapidly cooled to 35 DEG C；
（11）Surface treatment：A protective layer is covered with the surface of products formed, and carries out packing process.
The mass parameter of the sample that the present embodiment is obtained is：Grain size 11-12 level, yield strength 520MPa-580MPa resists
Tensile strength 660MPa-730MPa, percentage elongation 20-30%.
Embodiment 3：
A kind of technique for producing Aero-Space securing member, it is characterised in that comprise the steps：
（1）It is prepared by steel billet：Prepare raw material smelting molten steel, with the molten steel steel billet is casting continuously to form；Between each component of the steel billet
Mass parts are as follows：1 part of C, 0.5 part of Si, 1 part of Mn, 0.05 part of P, 0.05 part of S, 0.5 part of Cr, 0.2 part of Ni and surplus
Fe and impurity；
（2）Heating steel billet：By heating steel billet to 1000 DEG C, start rolling temperature is 1000 DEG C on high line roughing mill；
（3）It is prepared by wire rod：Milling train, pre-finishing mill, finishing mill, reducing sizing mill are processed into wire rod and spin in the high lines of steel billet Jing
Volume, laying temperature is controlled at 700 DEG C；
（4）The admission pressure for adjusting pinch roll is 8bar, and chucking power is 7bar；
（5）Wire-rod roll：The roller repairing of wire rod is carried out using Stelmor controlled cooling line so that the wire rod temperature after cooling is less than
Or equal to 250 DEG C, obtain wire-rod roll；
（6）Wire-rod roll is put in heating furnace and is heated slowly to 1000 DEG C, and keep 10h, then by wire-rod roll in heating furnace
Interior slow cooling takes out wire-rod roll and naturally cools to room temperature to after less than 300 DEG C from heating furnace；
（7）By step（6）In wire-rod roll be put into 40min in the hydrochloric acid solution that room temperature, concentration are 20%, use clean water hydrochloric acid
Corrosion product in water, forms secondary after epithelium in then successively the wire-rod roll for having processed being put into into oxalic acid liquid, phosphoric acid saline solution
With clean water, and the wire-rod roll for having cleaned and metallic soap are reacted to form metallic soap layer；
（8）By step（7）The wire-rod roll that middle process is completed first passes through continuous way wire drawing machine and is slightly taken out and annealed, then by taking out
Line machine is cold drawn to required line footpath；
（9）By the forged shape for reaching semi-finished product of wire-rod roll, length and thickness, then semi-finished product are rolled over system or tapping to reach
To required screw thread, products formed is formed；
（10）By step（9）In products formed be heated to 1000 DEG C after carry out Quenching Treatment, carry out high tempering simultaneously at 400 DEG C
It is rapidly cooled to 40 DEG C；
（11）Surface treatment：A protective layer is covered with the surface of products formed, and carries out packing process.
The mass parameter of the sample that the present embodiment is obtained is：Grain size 11-12 level, yield strength 480MPa-540MPa resists
Tensile strength 620MPa-700MPa, percentage elongation 22-32%.
The preferably step of the invention（5）In when being cooled down using Stelmor controlled cooling line, control wire rod morning pearly-lustre
Into 10 DEG C/s, at 650 DEG C, cooling rate is 2 DEG C/s to pearlitic transformation temperature control to cooling rate before body phase change after phase transformation.
The preferably step of the invention（7）In metallic soap be soda soap, increased lubricity.
The preferably step of the invention（9）In be forged to cold forging or heat between forge.
The preferably step of the invention（10）Middle Quenching Treatment is using water, oil or air hardening.
The preferably step of the invention（11）Middle surface treatment plays anti-corrosion using plating, galvanizing by dipping or mechanical plating
Erosion is acted on, attractive in appearance.
In sum, the good mechanical performance of securing member sample one to sample three of the invention, can be widely applied to core
The special industries such as electric industry, high ferro carrier, Automobile Transportation industry, Aero-Space industry, petroleum chemical industry, with high hard
The performance such as degree, high intensity, corrosion resistance are strong, non-oxidizability is strong, reduces production cost, improves work efficiency, being capable of batch
Production.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, on the premise of without departing from the technology of the present invention principle, some improvement and deformation can also be made, these improve and deform
Also should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of technique for producing Aero-Space securing member, it is characterised in that comprise the steps：
（1）It is prepared by steel billet：Prepare raw material smelting molten steel, with the molten steel steel billet is casting continuously to form；Between each component of the steel billet
Mass parts are as follows：0.5 ~ 1 part of C, 0.3 ~ 0.5 part of Si, 0.8 ~ 1 part of Mn, 0 ~ 0.05 part of P, 0 ~ 0.05 part of S, Cr 0.1 ~ 0.5
The Fe and impurity of part, 0.1 ~ 0.2 part of Ni and surplus；
（2）Heating steel billet：By heating steel billet to 900 ~ 1000 DEG C, start rolling temperature is 900 ~ 1000 DEG C on high line roughing mill；
（3）It is prepared by wire rod：Milling train, pre-finishing mill, finishing mill, reducing sizing mill are processed into wire rod and spin in the high lines of steel billet Jing
Volume, laying temperature is controlled at 650 ~ 700 DEG C；
（4）The admission pressure for adjusting pinch roll is 7 ~ 8bar, and chucking power is 5 ~ 7bar；
（5）Wire-rod roll：The roller repairing of wire rod is carried out using Stelmor controlled cooling line so that the wire rod temperature after cooling is less than
Or equal to 250 DEG C, obtain wire-rod roll；
（6）Wire-rod roll is put in heating furnace and is heated slowly to 600 ~ 1000 DEG C, and keep 5 ~ 10h, then wire-rod roll is existed
Slow cooling takes out wire-rod roll and naturally cools to room temperature to after less than 300 DEG C from heating furnace in heating furnace；
（7）By step（6）In wire-rod roll be put into room temperature, concentration be 10 ~ 20% hydrochloric acid solution in 20 ~ 40min, it is clear with clear water
Corrosion product in desalinization of soil by flooding or leaching sour water, in then successively the wire-rod roll for having processed being put into into oxalic acid liquid, phosphoric acid saline solution epithelium is formed
Secondary use clean water afterwards, and the wire-rod roll for having cleaned and metallic soap are reacted to form metallic soap layer；
（8）By step（7）The wire-rod roll that middle process is completed first passes through continuous way wire drawing machine and is slightly taken out and annealed, then by taking out
Line machine is cold drawn to required line footpath；
（9）By the forged shape for reaching semi-finished product of wire-rod roll, length and thickness, then semi-finished product are rolled over system or tapping to reach
To required screw thread, products formed is formed；
（10）By step（9）In products formed be heated to 500 ~ 1000 DEG C after carry out Quenching Treatment, carry out height at 200 ~ 400 DEG C
Temperature tempering is simultaneously rapidly cooled to 30 ~ 40 DEG C；
（11）Surface treatment：A protective layer is covered with the surface of products formed, and carries out packing process.
2. a kind of technique for producing Aero-Space securing member according to claim 1, it is characterised in that：The step
（5）In when being cooled down using Stelmor controlled cooling line, control wire rod morning pearlitic transformation before cooling rate be 10 DEG C/s, pearly-lustre
At 650 DEG C, cooling rate is 2 DEG C/s to body phase variable temperature control after phase transformation.
3. a kind of technique for producing Aero-Space securing member according to claim 1, it is characterised in that：The step
（7）In metallic soap be soda soap.
4. a kind of technique for producing Aero-Space securing member according to claim 1, it is characterised in that：The step
（9）In be forged to cold forging or heat between forge.
5. a kind of technique for producing Aero-Space securing member according to claim 1, it is characterised in that：The step
（10）Middle Quenching Treatment is using water, oil or air hardening.
6. a kind of technique for producing Aero-Space securing member according to claim 1, it is characterised in that：The step
（11）Middle surface treatment is using plating, galvanizing by dipping or mechanical plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710086471.2A CN106676393A (en) | 2017-02-17 | 2017-02-17 | Technology for producing fastener for aerospace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710086471.2A CN106676393A (en) | 2017-02-17 | 2017-02-17 | Technology for producing fastener for aerospace |
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| Publication Number | Publication Date |
|---|---|
| CN106676393A true CN106676393A (en) | 2017-05-17 |
Family
ID=58862681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710086471.2A Pending CN106676393A (en) | 2017-02-17 | 2017-02-17 | Technology for producing fastener for aerospace |
Country Status (1)
| Country | Link |
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| CN (1) | CN106676393A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430786A (en) * | 2020-11-23 | 2021-03-02 | 山西太钢不锈钢股份有限公司 | Stainless steel wire for welding in hydropower industry and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101116935A (en) * | 2007-09-07 | 2008-02-06 | 徐纳 | Valve collet producing technology |
| CN104213033A (en) * | 2014-09-03 | 2014-12-17 | 马钢(集团)控股有限公司 | 60-steel hot rolling coil rod with high strength and high plasticity and production method thereof |
| CN104400344A (en) * | 2014-10-30 | 2015-03-11 | 无锡市威海达机械制造有限公司 | Bolt manufacturing technology |
| CN104454881A (en) * | 2014-09-26 | 2015-03-25 | 无锡市天力五金弹簧厂 | Raw materials and process for manufacturing hexagon bolts |
| CN104439984A (en) * | 2014-12-17 | 2015-03-25 | 常熟市华星精密铸件有限公司 | Machining process of aviation screw |
| CN105543715A (en) * | 2015-12-25 | 2016-05-04 | 江苏烁石焊接科技有限公司 | High-intensity and corrosion-resistant high-nitrogen steel fastener and manufacturing process thereof |
-
2017
- 2017-02-17 CN CN201710086471.2A patent/CN106676393A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101116935A (en) * | 2007-09-07 | 2008-02-06 | 徐纳 | Valve collet producing technology |
| CN104213033A (en) * | 2014-09-03 | 2014-12-17 | 马钢(集团)控股有限公司 | 60-steel hot rolling coil rod with high strength and high plasticity and production method thereof |
| CN104454881A (en) * | 2014-09-26 | 2015-03-25 | 无锡市天力五金弹簧厂 | Raw materials and process for manufacturing hexagon bolts |
| CN104400344A (en) * | 2014-10-30 | 2015-03-11 | 无锡市威海达机械制造有限公司 | Bolt manufacturing technology |
| CN104439984A (en) * | 2014-12-17 | 2015-03-25 | 常熟市华星精密铸件有限公司 | Machining process of aviation screw |
| CN105543715A (en) * | 2015-12-25 | 2016-05-04 | 江苏烁石焊接科技有限公司 | High-intensity and corrosion-resistant high-nitrogen steel fastener and manufacturing process thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430786A (en) * | 2020-11-23 | 2021-03-02 | 山西太钢不锈钢股份有限公司 | Stainless steel wire for welding in hydropower industry and preparation method thereof |
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Application publication date: 20170517 |