CN114480950A - Preparation process of high-temperature-resistant high-strength special fastener - Google Patents
Preparation process of high-temperature-resistant high-strength special fastener Download PDFInfo
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- CN114480950A CN114480950A CN202011258652.7A CN202011258652A CN114480950A CN 114480950 A CN114480950 A CN 114480950A CN 202011258652 A CN202011258652 A CN 202011258652A CN 114480950 A CN114480950 A CN 114480950A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 20
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 11
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 11
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 18
- 238000005242 forging Methods 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 238000005098 hot rolling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 24
- 238000000034 method Methods 0.000 description 15
- 239000000956 alloy Substances 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000013386 optimize process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- 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
- C22C38/04—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
- C22C38/42—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
- C22C38/18—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
-
- 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
-
- 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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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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)
- Forging (AREA)
Abstract
The invention relates to the technical field of fastener production and processing, in particular to a preparation process of a high-temperature-resistant high-strength special fastener. The technical scheme adopted by the invention is as follows: the material comprises the following elements in percentage by weight: less than or equal to 0.04 percent of C, less than or equal to 0.35 percent of Si, less than or equal to 0.35 percent of Mn, less than or equal to 0.002 percent of S, less than or equal to 0.015 percent of P, and the weight ratio of Cr: 14.50-15.50%, Ni: 24.05-24.80%, Ti: 1.90-2.35%, B: 0.005-0.008%, Mo: 1.0-1.5%, V: 0.1-0.5%, Cu is less than or equal to 0.3%, Al is less than or equal to 0.30%, and the balance is iron and inevitable impurities. The invention has the advantages that: the mechanical property after the product is processed in the later stage is ensured to be stronger, the whole product has reliable plasticity and toughness, cold heading forming is facilitated, the whole cost is lower, the production efficiency in the later stage production processing is higher, and the material supply period is greatly reduced.
Description
Technical Field
The invention relates to the technical field of fastener production and processing, in particular to a preparation process of a high-temperature-resistant high-strength special fastener.
Background
ML-286 is a Fe-15Cr-25Ni (similar to national standard GH2132 brand) based wrought high-temperature alloy, is obtained by optimizing and adjusting the components of the alloy on the basis of the alloy, adding Mo, Ti, Al, V and trace B, Re for comprehensive reinforcement, belongs to the iron-nickel based wrought high-temperature alloy, has the advantages of fine and uniform crystal grains, small notch sensitivity, low carbon content fraction and the like, and has good comprehensive performance. The alloy is the most widely applied iron-nickel-based precipitation hardening type high-temperature alloy at present, has high yield strength, endurance strength and creep strength below 650 ℃, and has better processing plasticity and satisfactory welding performance. The high-temperature bearing part is suitable for manufacturing high-temperature bearing parts of an aircraft engine working for a long time at the temperature of below 650 ℃, such as fasteners, turbine discs, compressor discs, rotor blades and the like.
At present, the A286 fastener commonly used in the market adopts a warm upsetting forming process, so that the hardness of the material is relatively low, and the equipment and the operation cost required by the warm upsetting are higher. The company develops and produces the raw material wire rod suitable for the cold heading process, reduces the equipment and production operation cost of the fastener, and is more convenient for large-scale production. The project mainly improves the hardness of the ML-286 alloy cold heading fastener, and the hardness of the ML-286 alloy cold heading fastener after cold machining is improved by adjusting the Ms point of the material. The hardness of the wire rod after solid solution and aging can reach more than 30HRC, and the hardness of a finished cold heading piece made of the material can reach more than 32 HRC.
The high-temperature alloy material is mainly used for automobile engines and high-speed train fastener manufacturers. At present, the domestic demand is very large, and most of the products depend on imports, the supply period is long, and the price is high.
Disclosure of Invention
The invention aims to provide a preparation process of a high-temperature-resistant high-strength special fastener, which improves the product quality in the production and processing process by optimizing the composition of materials, ensures stronger mechanical property after the product is produced and processed in the later period by a brand-new processing and processing process, ensures that the whole has reliable plasticity and toughness, is beneficial to cold heading forming, has lower cost, ensures higher production efficiency in the later production and processing, and greatly reduces the supply period.
The technical scheme of the invention is as follows:
the preparation process of the high-temperature-resistant high-strength special fastener is characterized in that the used material consists of the following elements in percentage by weight: less than or equal to 0.04 percent of C, less than or equal to 0.35 percent of Si, less than or equal to 0.35 percent of Mn, less than or equal to 0.002 percent of S, less than or equal to 0.015 percent of P, and the weight ratio of Cr: 14.50-15.50%, Ni: 24.05-24.80%, Ti: 1.90-2.35%, B: 0.005-0.008%, Mo: 1.0-1.5%, V: 0.1-0.5%, Cu is less than or equal to 0.3%, Al is less than or equal to 0.30%, and the balance is iron and inevitable impurities, 1) the step of forging the materials is carried out, the charging temperature is less than or equal to 600 ℃, the temperature rise time is controlled to be more than or equal to 6 hours, the steel is turned frequently to prevent the sunny and shady surfaces, the flame is prohibited to be directly irradiated onto the steel ingot (blank), and the heating temperature is as follows: 1080-1100 ℃, the heat preservation time is more than or equal to 1.5 hours, the thorough burning is ensured, the open forging temperature is more than or equal to 1050 ℃, the finish forging temperature is more than or equal to 950 ℃, and air cooling treatment is carried out; 2) carrying out hot rolling treatment, wherein the charging temperature is less than or equal to 600 ℃, the temperature rise time is more than or equal to 1 hour, and the heating temperature is as follows: 1060-1080 ℃, the heat preservation time is more than or equal to 30 minutes, the initial rolling temperature is more than or equal to 1050 ℃, the final rolling temperature is more than or equal to 900 ℃, and air cooling is carried out; 3) and (3) carrying out solution treatment at the solution temperature of 980-1000 ℃, carrying out air cooling, oil cooling or water cooling in sequence, aging at 700-720 ℃ for 12-16 h, and then carrying out air cooling again.
Further, the temperature rise rate is controlled to be 1-3 ℃/second when the temperature rise is controlled.
Further, C is less than or equal to 0.04%, Si: 0.30%, Mn is less than or equal to 0.25%, S: 0.002%, P: 0.015%, Cr: 15.50%, Ni: 24.35%, Ti: 1.90-2.35%, B: 0.006%, Mo: 1.0-1.5%, V: 0.35 percent, less than or equal to 0.1 percent of Cu and less than or equal to 0.30 percent of Al.
Further, C is less than or equal to 0.04%, Si is less than or equal to 0.15%, Mn: 0.15%, S is less than or equal to 0.002%, P: 0.013%, Cr: 14.50%, Ni: 24.05-24.80%, Ti: 1.90-2.35%, B: 0.00%, Mo: 1.0-1.5%, V: 0.15%, Cu: 0.25%, Al: 0.20 percent.
The invention has the beneficial effects that:
the invention optimizes the composition of the material, improves the product quality in the production and processing process, ensures stronger mechanical property after the product is produced and processed in the later period through a brand new processing technology, ensures that the whole has reliable plasticity and toughness, is beneficial to cold heading forming, has lower cost, ensures higher production efficiency in the later period of production and processing, and greatly reduces the supply period.
Detailed Description
A preparation process of a high-temperature-resistant high-strength special fastener improves the product quality in the production and processing process by optimizing the composition of materials, ensures stronger mechanical property after the product is produced and processed in the later stage through a brand-new processing and processing process, ensures that the whole has reliable plasticity and toughness, is beneficial to cold heading forming, has lower cost, ensures higher production efficiency in the later-stage production and processing, and greatly reduces the material supply period. The material used by the production process consists of the following elements in percentage by weight: less than or equal to 0.04 percent of C, less than or equal to 0.35 percent of Si, less than or equal to 0.35 percent of Mn, less than or equal to 0.002 percent of S, less than or equal to 0.015 percent of P, and the weight ratio of Cr: 14.50-15.50%, Ni: 24.05-24.80%, Ti: 1.90-2.35%, B: 0.005-0.008%, Mo: 1.0-1.5%, V: 0.1-0.5%, Cu is less than or equal to 0.3%, Al is less than or equal to 0.30%, and the balance is iron and inevitable impurities, 1) the step of forging the materials is carried out, the charging temperature is less than or equal to 600 ℃, the temperature rise time is controlled to be more than or equal to 6 hours, the steel is turned frequently to prevent the sunny and shady surfaces, the flame is prohibited to be directly irradiated onto the steel ingot (blank), and the heating temperature is as follows: 1080-1100 ℃, the heat preservation time is more than or equal to 1.5 hours, the thorough burning is ensured, the open forging temperature is more than or equal to 1050 ℃, the finish forging temperature is more than or equal to 950 ℃, and air cooling treatment is carried out; 2) carrying out hot rolling treatment, wherein the charging temperature is less than or equal to 600 ℃, the temperature rise time is more than or equal to 1 hour, and the heating temperature is as follows: 1060-1080 ℃, the heat preservation time is more than or equal to 30 minutes, the initial rolling temperature is more than or equal to 1050 ℃, the final rolling temperature is more than or equal to 900 ℃, and air cooling is carried out; 3) and (3) carrying out solution treatment at the solution temperature of 980-1000 ℃, carrying out air cooling, oil cooling or water cooling in sequence, aging at 700-720 ℃ for 12-16 h, and then carrying out air cooling again. ML-286 has better processing plasticity and thermal stability, can still keep higher strength at a high temperature of more than 704 ℃, and can be widely applied to high-strength bolts for brake discs of high-speed trains, automobile engines and other high-temperature parts.
The head of the bolt is generally formed by upsetting, and cold upsetting, warm upsetting or hot upsetting can be selected according to the performance parameters of the processing material. If the process in the heading and forming process is improperly adopted, cracks or flash and folding phenomena often occur on the head of the bolt, so that the product percent of pass is reduced.
The project mainly develops the fastener which takes the outer hexagon bolt and the inner hexagon bolt as main materials and is made of the Ml-286 deformation high-temperature material by adopting a cold heading (extrusion) process. In order to give full play to the plastic processing performance of the material, maintain the metallographic structure of the metal material and prevent the metal grain streamline from being damaged, thereby ensuring various performance indexes such as the hardness of the finished products of fasteners such as bolts and the like, the forming mode adopts a cold heading forming process.
First, a blank is prepared. The blank is subjected to solution aging treatment and wire drawing except for the requirement of uniform chemical components and structure and no metal inclusion, and aims to eliminate residual stress remained in the metal during metal rolling, make the structure uniform and reasonably reduce the hardness.
Selecting a corresponding cold heading die; then, building solid models of an upper die, a lower die and a blank according to the three-dimensional solid modeling parameters, and assembling and positioning; and finally, determining and setting parameters in the shaping pretreatment module. The smoothness of the die is improved, the lubricating condition of the metal surface is improved, the friction force between the deformation body and the working surface of the die is reduced, and the tensile stress generated by friction in deformation is reduced as much as possible.
A suitable deformation specification is selected. When the metal material is subjected to plastic deformation, the deformation state of the metal material is often very complex, and whether the deformation size is reasonable or not directly influences the product quality and the service life of a die. In order to measure the stress and the strain of a deformation body in a complex deformation state, the simulation analysis of the machining process is facilitated, the concepts of equivalent stress and equivalent strain are introduced, and corresponding parameters needing to be set are measured and calculated.
The reasonable forming oil is selected, the high-temperature alloy is suitable for high-strength operation of a high-speed continuous cold header, and excellent performance is exerted in the bolt and nut forming process.
Determination of cold heading (extrusion) times: determining the upsetting frequency by using the Lo/do value, when the Lo/do is less than or equal to 2.0, only once upsetting is needed to form the head, longitudinal bending cannot occur, and when the Lo/do is less than or equal to 4.0, twice upsetting is needed to complete head forming; and when Lo/do is less than or equal to 7, the head is formed by three times of upsetting. In short, the larger the Lo/do value, the more number of upsetting operations is required.
The process flow of the cold heading (agent) hexagon bolt is as follows:
wire rod drawing → cold heading (extrusion) molding → thread rolling → cleaning → inspection → packaging → warehousing → leaving factory.
In conclusion, the optimized process parameters are adopted to carry out production tests, and the results show that: the bolt head has good forming quality, the appearance and the structural size meet the process requirements, the metallographic structure is uniform, fine and free of defects, and the technical requirements are met.
Preferably, the temperature rise rate is controlled to be 1-3 ℃/second when the temperature rise is controlled, so that the production of materials in the production process is more stable, and the safety in the whole process is higher
Preferably, C.ltoreq.0.04%, Si: 0.30%, Mn is less than or equal to 0.25%, S: 0.002%, P: 0.015%, Cr: 15.50%, Ni: 24.35%, Ti: 1.90-2.35%, B: 0.006%, Mo: 1.0-1.5%, V: 0.35 percent, less than or equal to 0.1 percent of Cu and less than or equal to 0.30 percent of Al, is more convenient in production and processing, and can ensure that the overall processing efficiency in the production process is higher, thereby further reducing the production cost and ensuring that the overall effect in production is better.
Preferably, C.ltoreq.0.04%, Si.ltoreq.0.15%, Mn: 0.15%, S is less than or equal to 0.002%, P: 0.013%, Cr: 14.50%, Ni: 24.05-24.80%, Ti: 1.90-2.35%, B: 0.00%, Mo: 1.0-1.5%, V: 0.15%, Cu: 0.25%, Al: 0.20%, the impurity content is less during production, the performance is more reliable during use, the integral product quality can be better ensured, and the product quality is also more guaranteed when the fastener is produced in the later period.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications or substitutions can be made without departing from the principle of the present invention, and these modifications or substitutions should also be considered as the protection scope of the present invention.
Claims (4)
1. The preparation process of the high-temperature-resistant high-strength special fastener is characterized in that the used material consists of the following elements in percentage by weight: less than or equal to 0.04 percent of C, less than or equal to 0.35 percent of Si, less than or equal to 0.35 percent of Mn, less than or equal to 0.002 percent of S, less than or equal to 0.015 percent of P, and the weight ratio of Cr: 14.50-15.50%, Ni: 24.05-24.80%, Ti: 1.90-2.35%, B: 0.005-0.008%, Mo: 1.0-1.5%, V: 0.1-0.5%, less than or equal to 0.3% of Cu, less than or equal to 0.30% of Al, and the balance of iron and inevitable impurities, 1) forging the materials, wherein the charging temperature is less than or equal to 600 ℃, the temperature rise time is controlled to be more than or equal to 6 hours, the steel is turned over on duty to prevent the shade and sun surfaces, flames are prohibited from directly irradiating steel ingots (blanks), and the heating temperature is as follows: 1080-1100 ℃, the heat preservation time is more than or equal to 1.5 hours, the thorough burning is ensured, the open forging temperature is more than or equal to 1050 ℃, the finish forging temperature is more than or equal to 950 ℃, and air cooling treatment is carried out; 2) carrying out hot rolling treatment, wherein the charging temperature is less than or equal to 600 ℃, the temperature rise time is more than or equal to 1 hour, and the heating temperature is as follows: 1060-1080 ℃, the heat preservation time is more than or equal to 30 minutes, the initial rolling temperature is more than or equal to 1050 ℃, the final rolling temperature is more than or equal to 900 ℃, and air cooling is carried out; 3) and (3) carrying out solution treatment at the solution temperature of 980-1000 ℃, carrying out air cooling, oil cooling or water cooling in sequence, aging at 700-720 ℃ for 12-16 h, and then carrying out air cooling again.
2. The preparation process of the high-temperature-resistant high-strength special fastener as claimed in claim 1, wherein the preparation process comprises the following steps: the temperature rise rate is controlled to be 1-3 ℃/second when the temperature rise is carried out.
3. The preparation process of the high-temperature-resistant high-strength special fastener as claimed in claim 1, wherein the preparation process comprises the following steps: c is less than or equal to 0.04 percent, Si: 0.30%, Mn is less than or equal to 0.25%, S: 0.002%, P: 0.015%, Cr: 15.50%, Ni: 24.35%, Ti: 1.90-2.35%, B: 0.006%, Mo: 1.0-1.5%, V: 0.35 percent, less than or equal to 0.1 percent of Cu and less than or equal to 0.30 percent of Al.
4. The preparation process of the high-temperature-resistant high-strength special fastener as claimed in claim 1, wherein the preparation process comprises the following steps: c is less than or equal to 0.04 percent, Si is less than or equal to 0.15 percent, Mn: 0.15%, S is less than or equal to 0.002%, P: 0.013%, Cr: 14.50%, Ni: 24.05-24.80%, Ti: 1.90-2.35%, B: 0.00%, Mo: 1.0-1.5%, V: 0.15%, Cu: 0.25%, Al: 0.20 percent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011258652.7A CN114480950A (en) | 2020-11-11 | 2020-11-11 | Preparation process of high-temperature-resistant high-strength special fastener |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116770038A (en) * | 2023-05-11 | 2023-09-19 | 盐城腾鸿金属制品有限公司 | Preparation method of high-performance fastener and fastener |
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2020
- 2020-11-11 CN CN202011258652.7A patent/CN114480950A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116770038A (en) * | 2023-05-11 | 2023-09-19 | 盐城腾鸿金属制品有限公司 | Preparation method of high-performance fastener and fastener |
| CN116770038B (en) * | 2023-05-11 | 2024-01-26 | 盐城腾鸿金属制品有限公司 | Preparation method of high-performance fastener and fastener |
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Application publication date: 20220513 |