CN112281081A - Stainless steel material, bolt manufacturing method and bolt - Google Patents
Stainless steel material, bolt manufacturing method and bolt Download PDFInfo
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- CN112281081A CN112281081A CN202011207752.7A CN202011207752A CN112281081A CN 112281081 A CN112281081 A CN 112281081A CN 202011207752 A CN202011207752 A CN 202011207752A CN 112281081 A CN112281081 A CN 112281081A
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- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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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
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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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- 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
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Abstract
The embodiment of the application provides a stainless steel material, a bolt manufacturing method and a bolt, wherein the stainless steel comprises the following chemical element components in percentage by mass: less than or equal to 0.012 percent of C, less than or equal to 0.1 percent of Si, less than or equal to 0.15 percent of Mn, less than or equal to 0.005 percent of S, less than or equal to 0.015 percent of P, and the weight ratio of Cr: 10.5% or more and 12.5% or less, Ni: 10.7% or more and 11.5% or less, Mo: 0.75% or more and 1.25% or less, Ti: more than or equal to 1 percent and less than or equal to 1.3 percent, less than or equal to 0.1 percent of Al, less than or equal to 0.00015 percent of H, and the balance of Fe; the bolt is made of the stainless steel. The stainless steel of the embodiment of the application has higher hardness and strength, and can meet the use requirements of aerospace vehicles; the bolt made of the stainless steel can avoid the phenomena of hydrogen embrittlement and seizure.
Description
Technical Field
The application relates to the technical field of aerospace connecting fastener design, in particular to a stainless steel material, a bolt manufacturing method and a bolt.
Background
On the aerospace craft, bolts are generally adopted as fasteners when adjacent cabin sections are butted, and the aerospace craft bears high temperature and large load in the flying process, so that the requirement on the reliability of the bolts is high, and the bolt material is high-temperature-resistant high-strength steel.
In the related art, the bolt material commonly used on aerospace vehicles is 30CrMnSiA and 17-4PH (0Cr17Ni4Cu4 Nb). However, the inventors have found that bolts made from 30CrMnSiA materials often exhibit hydrogen embrittlement during use, whereas bolts made from 17-4PH (0Cr17Ni4Cu4Nb) materials often exhibit bolt seizure during use.
Disclosure of Invention
The embodiment of the application provides a stainless steel material, a bolt manufacturing method and a bolt, which are used for solving the problems of hydrogen embrittlement and seizure of the bolt on an aerospace vehicle in the related art.
According to a first aspect of embodiments of the present application, there is provided a stainless steel material, comprising the following chemical element components by mass percent:
less than or equal to 0.012 percent of C, less than or equal to 0.1 percent of Si, less than or equal to 0.15 percent of Mn, less than or equal to 0.005 percent of S, less than or equal to 0.015 percent of P, and the weight ratio of Cr: 10.5% or more and 12.5% or less, Ni: 10.7% or more and 11.5% or less, Mo: 0.75% or more and 1.25% or less, Ti: more than or equal to 1 percent and less than or equal to 1.3 percent, less than or equal to 0.1 percent of Al, less than or equal to 0.00015 percent of H, and the balance of Fe.
According to a second aspect of the embodiments of the present application, there is provided a bolt manufacturing method including the steps of:
performing solution heat treatment, namely heating the bolt blank to a first preset temperature and keeping the temperature constant for a first preset time, so that the intermediate phase of the bolt blank is fully dissolved in the solid solution and then is rapidly cooled to obtain a saturated solid solution; wherein, the bolt blank is made of the stainless steel material as claimed in claim 1 and comprises a nut and a screw rod;
performing cold treatment, namely continuously cooling the bolt blank subjected to the solution heat treatment to a second preset temperature and keeping the temperature for a second preset time, so that the residual austenite which is not transformed at room temperature in the bolt blank subjected to the solution heat treatment is continuously transformed into martensite;
and (4) aging treatment, namely placing the cold-treated bolt blank at a third preset temperature for a third preset time so as to improve the hardness and strength of the bolt blank.
Optionally, in the method for manufacturing a bolt, in the step of solution heat treatment, the first preset temperature is greater than or equal to 880 ℃ and less than or equal to 920 ℃, and the first preset time is greater than or equal to 40 minutes and less than or equal to 60 minutes.
The bolt manufacturing method as described above, optionally, the step of rapid cooling in the solution heat treatment specifically includes:
and (3) adopting an oil cooling or water cooling mode to fully dissolve the intermediate phase into the solid solution and then quickly cooling.
Optionally, in the bolt manufacturing method, in the step of cold treatment, the second preset temperature is greater than or equal to-80 ℃ and less than or equal to-60 ℃, and the second preset time is greater than or equal to 8.5 hours and less than or equal to 9.5 hours.
Optionally, in the bolt manufacturing method described above, in the aging treatment step, the third preset temperature is greater than or equal to 480 ℃ and less than or equal to 520 ℃, and the third preset time is greater than or equal to 4 hours and less than or equal to 6 hours.
The bolt manufacturing method as described above, optionally after the step of aging, the method further comprising:
turning, namely turning the nut and the polished rod of the bolt blank in a turning mode on the bolt blank subjected to the aging treatment;
rolling, namely rolling the turned polished rod at a fourth preset temperature to obtain a threaded rod with threads;
and rolling a round angle, wherein the round angle between the screw cap and the screw is processed in a cold rolling way.
Optionally, in the bolt manufacturing method, in the step of thread rolling, the fourth preset temperature is set to be greater than or equal to 320 ℃ and less than or equal to 420 ℃.
The bolt manufacturing method as described above, optionally, after the step of rounding off, the method further comprises:
and (3) performing surface treatment, namely performing anti-corrosion treatment on the surface of the bolt blank subjected to rounding by adopting a high-strength diamond-like film to obtain the bolt.
The bolt manufacturing method as described above, optionally, before the solution heat treatment, the method further comprising:
manufacturing a blank, namely cutting a steel bar made of stainless steel to obtain a blank with a preset size;
hot heading forming, wherein one end of the blank is headed into the shape of a screw cap;
and (4) sand blasting, namely cleaning and coarsening the surface of the blank by utilizing high-speed sand flow, and removing surface oxide skin to obtain the bolt blank.
According to the bolt manufacturing method, optionally, the tensile strength of the steel bar made of the stainless steel is more than or equal to 1550MPa at room temperature, the yield strength is more than or equal to 1450MPa, the elongation is more than or equal to 9%, the reduction of area is more than or equal to 45%, the impact energy is more than or equal to 45J, and the Rockwell hardness is more than or equal to 45;
the tensile strength of the steel bar made of the stainless steel is more than or equal to 1200MPa at 235 ℃, the yield strength is more than or equal to 1100MPa, the elongation is more than or equal to 9 percent, and the reduction of area is more than or equal to 50 percent;
the tensile strength of the steel bar made of the stainless steel is more than or equal to 1050MPa at 425 ℃, the yield strength is more than or equal to 900MPa, the elongation is more than or equal to 9 percent, and the reduction of area is more than or equal to 50 percent.
According to a third aspect of the embodiments of the present application, there is provided a bolt manufactured by the bolt manufacturing method as described in any one of the above.
The embodiment of the application provides a stainless steel material, a bolt manufacturing method and a bolt, wherein the stainless steel contains chemical element components in percentage by mass: less than or equal to 0.012 percent of C, less than or equal to 0.1 percent of Si, less than or equal to 0.15 percent of Mn, less than or equal to 0.005 percent of S, less than or equal to 0.015 percent of P, and the weight ratio of Cr: 10.5% or more and 12.5% or less, Ni: 10.7% or more and 11.5% or less, Mo: 0.75% or more and 1.25% or less, Ti: more than or equal to 1 percent and less than or equal to 1.3 percent, less than or equal to 0.1 percent of Al, less than or equal to 0.00015 percent of H, and the balance of Fe. The bolt is made of the stainless steel. The stainless steel of the embodiment of the application has higher hardness and strength, and can meet the use requirements of aerospace vehicles; the bolt made of the stainless steel can avoid the phenomena of hydrogen embrittlement and seizure.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart illustrating a bolt manufacturing method according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment provides a stainless steel material which comprises the following chemical element components in percentage by mass: less than or equal to 0.012 percent of C, less than or equal to 0.1 percent of Si, less than or equal to 0.15 percent of Mn, less than or equal to 0.005 percent of S, less than or equal to 0.015 percent of P, and the weight ratio of Cr: 10.5% or more and 12.5% or less, Ni: 10.7% or more and 11.5% or less, Mo: 0.75% or more and 1.25% or less, Ti: more than or equal to 1 percent and less than or equal to 1.3 percent, less than or equal to 0.1 percent of Al, less than or equal to 0.00015 percent of H, and the balance of Fe.
The embodiment also provides a manufacturing method of the bolt, which comprises the following steps:
step S110: manufacturing a blank, namely cutting a steel bar made of stainless steel to obtain a blank with a preset size;
step S120: hot heading forming, wherein one end of the blank is headed into the shape of a screw cap;
step S130: performing sand blasting, namely cleaning and coarsening the surface of the blank by utilizing high-speed sand flow, and removing surface oxide skin to obtain a bolt blank;
it should be noted that the process from the first step to the third step only exemplifies a manufacturing method of the bolt blank, and the manufacturing method of the bolt blank can be other methods.
Step S140: performing solution heat treatment, namely heating the bolt blank to a first preset temperature and keeping the temperature constant for a first preset time, so that the intermediate phase of the bolt blank is fully dissolved in the solid solution and then is rapidly cooled to obtain a saturated solid solution; the bolt blank is made of the stainless steel material and comprises a nut and a screw;
step S150: performing cold treatment, namely continuously cooling the bolt blank subjected to the solution heat treatment to a second preset temperature and keeping the temperature for a second preset time, so that the residual austenite which is not transformed at room temperature in the bolt blank subjected to the solution heat treatment is continuously transformed into martensite;
step S160: aging, namely placing the cold-treated bolt blank at a third preset temperature for a third preset time to improve the hardness and strength of the bolt blank;
in the fourth step to the sixth step of the invention, in the third step, the condition that hydrogen is not generated in the bolt blank after the aging treatment is realized through setting parameters of each step, namely, hydrogen is not generated or is less generated in the stainless steel bolt blank after the aging treatment, so that the bolt manufactured by the stainless steel bolt blank after the aging treatment is difficult to generate or does not generate hydrogen embrittlement phenomenon.
Step S170: turning, namely turning the nut and the polished rod of the bolt blank in a turning mode on the bolt blank subjected to the aging treatment; the step is to further refine turning the bolt blank after the aging treatment so that the manufactured bolt meets the requirement of size.
Step S180: rolling, namely rolling the turned polished rod at a fourth preset temperature to obtain a threaded rod with threads;
step S190: rolling a round angle, namely processing the round angle between the screw cap and the screw rod by adopting a cold rolling mode;
step S200: and (3) performing surface treatment, namely performing anti-corrosion treatment on the surface of the bolt blank subjected to the rounding angle by adopting a high-strength diamond-like film to obtain the bolt. The anti-corrosion treatment adopts a high-strength diamond-like carbon film (DLC) which has the function of reducing friction, and meanwhile, hydrogen is not contained in the components. The corrosion-resistant alloy has good corrosion-resistant effect after being optimized in process and components, is high in hardness, and can avoid thread seizure.
Wherein, in the solid solution heat treatment, the first preset temperature is 920 ℃, and the first preset time is 60 min. In the solid solution heat treatment, the intermediate phase is fully dissolved in the solid solution by adopting an oil cooling or water cooling mode and then is rapidly cooled. In the cold treatment, the second preset temperature is-60 ℃ and the second preset time is 9.5 hours. In the aging treatment, the third preset temperature is 520 ℃, the third preset time is 6 hours, and the fourth preset temperature is 420 ℃.
Specifically, the step of rapidly cooling in the solution heat treatment specifically includes: and (3) adopting an oil cooling or water cooling mode to fully dissolve the intermediate phase into the solid solution and then quickly cooling.
It should be noted that the parameters in the solution heat treatment, the cold treatment and the aging treatment can achieve that no hydrogen is generated in the bolt blank after the aging treatment within the preset range of the parameters, and the preset range of the parameters is as follows:
in the step of solution heat treatment, the value range of the first preset temperature is greater than or equal to 880 ℃ and less than or equal to 920 ℃, and the value range of the first preset time is greater than or equal to 40 minutes and less than or equal to 60 minutes;
and (3) adopting an oil cooling or water cooling mode to fully dissolve the intermediate phase into the solid solution and then quickly cooling.
In the step of cold treatment, the second preset temperature is greater than or equal to-80 ℃ and less than or equal to-60 ℃, and the second preset time is greater than or equal to 8.5 hours and less than or equal to 9.5 hours.
In the aging treatment step, the third preset temperature is greater than or equal to 480 ℃ and less than or equal to 520 ℃, and the third preset time is greater than or equal to 4 hours and less than or equal to 6 hours.
The embodiment also provides a bolt manufactured by the method.
The tensile strength Rm at room temperature of the bolt after heat treatment is more than or equal to 1550MPa, and compared with the tensile strength Rm at room temperature of a 30CrMnSiA bolt commonly used in the related technology, which is more than or equal to 1080MPa and the tensile strength Rm at room temperature of a 0Cr17Ni4Cu4Nb bolt, which is more than or equal to 1310MPa, the tensile strength of the bolt is greatly improved, and the bolt has very important significance for improving the strength grade of the bolt under the use conditions of butt joint of aerospace vehicles, equipment connection and the like.
The hydrogen content of the bolt provided by the embodiment is not more than 1.5ppm, and is reduced compared with the hydrogen content of high-strength steel bolts such as 30CrMnSiA, 0Cr17Ni4Cu4Nb and the like commonly used in aerospace systems. The surface treatment of the bolt adopts DLC film coating protection, and the bolt can simultaneously avoid the problems of hydrogen embrittlement and seizure under the use conditions of butt joint of aerospace vehicles, equipment connection and the like.
The mechanical properties of the steel bar made of the stainless steel material of the above embodiment need to meet the performance requirements as shown in the following table:
as can be seen from the table above, the tensile strength of the steel bar at room temperature is more than or equal to 1550MPa, the yield strength is more than or equal to 1450MPa, the elongation is more than or equal to 9%, the reduction of area is more than or equal to 45%, the impact energy is more than or equal to 45J, and the Rockwell hardness is more than or equal to 45; the tensile strength is more than or equal to 1200MPa, the yield strength is more than or equal to 1100MPa, the elongation is more than or equal to 9 percent, and the reduction of area is more than or equal to 50 percent at 235 ℃; at 425 ℃, the tensile strength is more than or equal to 1050MPa, the yield strength is more than or equal to 900MPa, the elongation is more than or equal to 9 percent, and the reduction of area is more than or equal to 50 percent.
The stainless steel material of the above embodiment can be made to include bolts with diameters of 6mm, 8mm, 10mm or 12mm, and the parameters of the specific bolts of each size can meet the performance requirements as shown in the following table:
the mechanical properties required for bolts of different sizes are shown in the following tables, wherein the room temperature minimum tensile load is shown in the following table:
| thread specification | Area of stress of thread/mm2 | Minimum tensile load/kN at room temperature |
| M6 | 20.10 | 31.16 |
| M8 | 36.60 | 56.73 |
| M10 | 58.00 | 89.90 |
| M12×1.5 | 88.10 | 136.56 |
The minimum double shear load at room temperature is shown in the following table:
| thread specification | Area of single-sided shear stress/mm2 | Minimum double shear load/kN at room temperature |
| M6 | 28.27 | 52.52 |
| M8 | 50.27 | 93.4 |
| M10 | 78.54 | 145.92 |
| M12×1.5 | 113.10 | 210.14 |
Wedge load test the minimum tensile load is shown in the following table:
| thread specification | Wedge load test minimum tensile load/kN |
| M6 | 26.13 |
| M8 | 47.58 |
| M10 | 75.40 |
| M12×1.5 | 114.53 |
The stress endurance load is shown in the following table:
| thread specification | Stress endurance load/kN |
| M6 | 24.11 |
| M8 | 43.90 |
| M10 | 69.57 |
| M12×1.5 | 105.68 |
The bolt made of the stainless steel material of the embodiment has high strength and hardness, and simultaneously has a good anti-corrosion effect, so that the phenomena of hydrogen embrittlement and seizure of the bolt are avoided.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (12)
1. The stainless steel material is characterized by comprising the following chemical element components in percentage by mass:
less than or equal to 0.012 percent of C, less than or equal to 0.1 percent of Si, less than or equal to 0.15 percent of Mn, less than or equal to 0.005 percent of S, less than or equal to 0.015 percent of P, and the weight ratio of Cr: 10.5% or more and 12.5% or less, Ni: 10.7% or more and 11.5% or less, Mo: 0.75% or more and 1.25% or less, Ti: more than or equal to 1 percent and less than or equal to 1.3 percent, less than or equal to 0.1 percent of Al, less than or equal to 0.00015 percent of H, and the balance of Fe.
2. A bolt manufacturing method is characterized by comprising the following steps:
performing solution heat treatment, namely heating the bolt blank to a first preset temperature and keeping the temperature constant for a first preset time, so that the intermediate phase of the bolt blank is fully dissolved in the solid solution and then is rapidly cooled to obtain a saturated solid solution; wherein, the bolt blank is made of the stainless steel material as claimed in claim 1 and comprises a nut and a screw rod;
performing cold treatment, namely continuously cooling the bolt blank subjected to the solution heat treatment to a second preset temperature and keeping the temperature for a second preset time, so that the residual austenite which is not transformed at room temperature in the bolt blank subjected to the solution heat treatment is continuously transformed into martensite;
and (4) aging treatment, namely placing the cold-treated bolt blank at a third preset temperature for a third preset time so as to improve the hardness and strength of the bolt blank.
3. The method of manufacturing a bolt according to claim 2, wherein in the step of solution heat treatment, the first predetermined temperature is in a range of 880 ℃ or more and 920 ℃ or less, and the first predetermined time is in a range of 40 minutes or more and 60 minutes or less.
4. The method for manufacturing a bolt according to claim 3, wherein the step of rapid cooling in the solution heat treatment is specifically:
and (3) adopting an oil cooling or water cooling mode to fully dissolve the intermediate phase into the solid solution and then quickly cooling.
5. The method for manufacturing a bolt according to claim 2, wherein in the step of cold treatment, the second predetermined temperature is in a range of not less than-80 ℃ and not more than-60 ℃, and the second predetermined time is in a range of not less than 8.5 hours and not more than 9.5 hours.
6. The bolt manufacturing method according to claim 2, wherein in the aging treatment step, the third preset temperature is in a range of 480 ℃ or more and 520 ℃ or less, and the third preset time is in a range of 4 hours or more and 6 hours or less.
7. The method of manufacturing a bolt according to claim 2, wherein after the step of aging, the method further comprises:
turning, namely turning the nut and the polished rod of the bolt blank in a turning mode on the bolt blank subjected to the aging treatment;
rolling, namely rolling the turned polished rod at a fourth preset temperature to obtain a threaded rod with threads;
and rolling a round angle, wherein the round angle between the screw cap and the screw is processed in a cold rolling way.
8. The bolt manufacturing method according to claim 7, wherein in the step of rolling, the fourth preset temperature is set to a value in a range of 320 ℃ or more and 420 ℃ or less.
9. The method of manufacturing a bolt according to claim 7, wherein after the step of rounding off the corners, the method further comprises:
and (3) performing surface treatment, namely performing anti-corrosion treatment on the surface of the bolt blank subjected to rounding by adopting a high-strength diamond-like film to obtain the bolt.
10. The bolt manufacturing method according to claim 2, characterized in that, prior to the solution heat treatment, the method further comprises:
manufacturing a blank, namely cutting a steel bar made of stainless steel to obtain a blank with a preset size;
hot heading forming, wherein one end of the blank is headed into the shape of a screw cap;
and (4) sand blasting, namely cleaning and coarsening the surface of the blank by utilizing high-speed sand flow, and removing surface oxide skin to obtain the bolt blank.
11. The method for manufacturing a bolt according to claim 10, wherein the steel bar made of stainless steel has a tensile strength of 1550MPa or more, a yield strength of 1450MPa or more, an elongation of 9% or more, a reduction of area of 45% or more, an impact energy of 45J or more, and a rockwell hardness of 45 or more at room temperature;
the tensile strength of the steel bar made of the stainless steel is more than or equal to 1200MPa at 235 ℃, the yield strength is more than or equal to 1100MPa, the elongation is more than or equal to 9 percent, and the reduction of area is more than or equal to 50 percent;
the tensile strength of the steel bar made of the stainless steel is more than or equal to 1050MPa at 425 ℃, the yield strength is more than or equal to 900MPa, the elongation is more than or equal to 9 percent, and the reduction of area is more than or equal to 50 percent.
12. A bolt produced by the method for producing a bolt according to any one of claims 2 to 11.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116622964A (en) * | 2023-04-21 | 2023-08-22 | 江苏沙钢集团淮钢特钢股份有限公司 | Dynamic strain aging strengthening process in non-quenched and tempered weather-proof bolt manufacturing process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6415348A (en) * | 1987-07-08 | 1989-01-19 | Aichi Steel Works Ltd | Martensitic stainless steel |
| JP2005171335A (en) * | 2003-12-12 | 2005-06-30 | Sanyo Special Steel Co Ltd | Precipitation hardening stainless steel for cold working having excellent machinability |
| CN106086701A (en) * | 2016-08-30 | 2016-11-09 | 四川六合锻造股份有限公司 | A kind of high strength martensitic PH stainless steel material and preparation method thereof |
| CN207331066U (en) * | 2017-08-24 | 2018-05-08 | 中国农业机械化科学研究院 | A kind of folding device under marine atmosphere |
| CN109023152A (en) * | 2018-08-31 | 2018-12-18 | 贵州航铄工业股份有限公司 | A kind of manufacturing method of high-strength anti-fatigue bolt alloy material and bolt |
| CN110106397A (en) * | 2019-05-11 | 2019-08-09 | 温州市洲泰五金制造有限公司 | A kind of manufacturing method of high temperature resistant bolt alloy material and bolt |
| CN111218618A (en) * | 2020-02-27 | 2020-06-02 | 钢铁研究总院 | Hydrogen embrittlement resistant, high strength and toughness stainless steel bar for fastener and method of making same |
-
2020
- 2020-11-03 CN CN202011207752.7A patent/CN112281081A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6415348A (en) * | 1987-07-08 | 1989-01-19 | Aichi Steel Works Ltd | Martensitic stainless steel |
| JP2005171335A (en) * | 2003-12-12 | 2005-06-30 | Sanyo Special Steel Co Ltd | Precipitation hardening stainless steel for cold working having excellent machinability |
| CN106086701A (en) * | 2016-08-30 | 2016-11-09 | 四川六合锻造股份有限公司 | A kind of high strength martensitic PH stainless steel material and preparation method thereof |
| CN207331066U (en) * | 2017-08-24 | 2018-05-08 | 中国农业机械化科学研究院 | A kind of folding device under marine atmosphere |
| CN109023152A (en) * | 2018-08-31 | 2018-12-18 | 贵州航铄工业股份有限公司 | A kind of manufacturing method of high-strength anti-fatigue bolt alloy material and bolt |
| CN110106397A (en) * | 2019-05-11 | 2019-08-09 | 温州市洲泰五金制造有限公司 | A kind of manufacturing method of high temperature resistant bolt alloy material and bolt |
| CN111218618A (en) * | 2020-02-27 | 2020-06-02 | 钢铁研究总院 | Hydrogen embrittlement resistant, high strength and toughness stainless steel bar for fastener and method of making same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116622964A (en) * | 2023-04-21 | 2023-08-22 | 江苏沙钢集团淮钢特钢股份有限公司 | Dynamic strain aging strengthening process in non-quenched and tempered weather-proof bolt manufacturing process |
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