CN114921623A - Stainless steel stress removing and annealing method - Google Patents
Stainless steel stress removing and annealing method Download PDFInfo
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- 239000010935 stainless steel Substances 0.000 title claims abstract description 84
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 84
- 238000000137 annealing Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 238000001816 cooling Methods 0.000 claims abstract description 31
- 238000005266 casting Methods 0.000 claims abstract description 23
- 238000010791 quenching Methods 0.000 claims abstract description 12
- 230000000171 quenching effect Effects 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 11
- 239000010439 graphite Substances 0.000 claims abstract description 11
- 238000005728 strengthening Methods 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 230000005496 eutectics Effects 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000035882 stress Effects 0.000 claims description 42
- 230000032683 aging Effects 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 17
- 239000006104 solid solution Substances 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 10
- 230000007797 corrosion Effects 0.000 claims description 8
- 238000005260 corrosion Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000010285 flame spraying Methods 0.000 claims description 5
- 229910000765 intermetallic Inorganic materials 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 5
- 229910000734 martensite Inorganic materials 0.000 claims description 5
- 238000005204 segregation Methods 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- C21D1/30—Stress-relieving
-
- 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
-
- 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
- C21D6/04—Hardening by cooling below 0 degrees Celsius
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/006—Graphite
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention provides a stainless steel stress removing annealing method, which relates to the technical field of stress removing heat treatment, wherein annealing treatment and internal stress removing annealing are generally to heat a casting to 800 ℃/1000 ℃ at the speed of 60-100C/h, and keep the temperature for a period of time, so that the temperature of each part and the surface and the inside of stainless steel is uniform, and the residual stress is relaxed and stabilized at the temperature; then slowly cooling to about 200 ℃ at the cooling speed of 20 ℃/h-40 ℃ for 1h, discharging and air cooling, and basically eliminating the internal stress of the casting at the moment; annealing at the temperature above eutectoid temperature to decompose the permeant into graphite, heating the stainless steel to the melting point range of eutectic at the temperature of 750-850 ℃, preserving the heat for more than 3 hours to fully decompose the soluble phase in the stainless steel, and then rapidly quenching the stainless steel into water at the temperature of 100-120 ℃ to rapidly cool the stainless steel; the strengthening components are dissolved in the alloy to the maximum extent and are fixed and stored in a greenhouse.
Description
Technical Field
The invention belongs to the technical field of stress relief heat treatment, and particularly relates to a stainless steel stress relief annealing method.
Background
Heating the workpiece to a lower temperature, preserving heat for a certain time, and then cooling to recover the workpiece, so that the process of eliminating residual internal stress is called stress relief annealing; in practice, the application of the stress-relief annealing process is much broader than the above definition. The processes of hot forging, casting, various cold deformation processes, cutting or cutting, welding, heat treatment, even after the machine parts are assembled, heating the steel or the machine parts at a lower temperature under the conditions of not changing the structure state, keeping cold work, hot work or surface hardening so as to remove (all or part of) internal stress and reduce the deformation and cracking tendency are called stress relief annealing. Due to the difference of material components, processing methods, the size and distribution of internal stress and the difference of removal degrees, the stress relief annealing temperature range is wide. Conventionally, the stress relief treatment at higher temperatures is called stress relief annealing, while the treatment at lower temperatures, called stress relief tempering, is essentially the same.
However, the stainless steel after the traditional stress-relief annealing heat treatment has weak tensile resistance, poor plasticity and toughness performance and poor corrosion resistance.
Therefore, it is necessary to develop a stress-relief annealing method for stainless steel.
Disclosure of Invention
In order to solve the technical problems, the invention provides a stainless steel stress removal annealing method, which aims to solve the problems of weak tensile resistance, poor plasticity and toughness performance and poor corrosion resistance of the stainless steel after the traditional stress removal annealing heat treatment. A stainless steel stress removing annealing method comprises the following steps:
the method comprises the following steps: annealing treatment, namely heating the stainless steel to 800-;
step two: quenching treatment, namely heating the stainless steel to the range of eutectic melting point, wherein the temperature is between 750 ℃ and 850 ℃, preserving heat for more than 3 hours to fully decompose soluble phases in the stainless steel, and then rapidly quenching the stainless steel into water at the temperature of 100 ℃ and 120 ℃ to rapidly cool the stainless steel; the strengthening components are dissolved in the alloy to the maximum extent and are fixed and stored in a greenhouse;
step three: aging treatment, namely heating the quenched stainless steel to 800 ℃ with 500-;
step four: and (3) circulating treatment, namely cooling the stainless steel to the temperature of between 150 ℃ below zero and 200 ℃ below zero for 3 hours, then heating the stainless steel to the temperature of between 300 ℃ and 500 ℃ to repeatedly shrink and expand the medium solid solution lattice of the stainless steel and to shift the crystal grains of each phase a little so as to enable the atomic segregation areas and the intermetallic compound particles in the solid solution crystal lattice to be in a more stable state, thereby achieving the purposes of improving the size of the product part and stabilizing the volume.
Preferably, the first step: annealing treatment, wherein the annealing for eliminating internal stress usually comprises the steps of heating the casting to 800 ℃/1000 ℃ at the speed of 60-100 ℃ per hour, and preserving the temperature for a period of time, so that the temperature of each part and the surface and the inside of the stainless steel are uniform, and the residual stress is relaxed and stabilized at the temperature; then slowly cooling to about 200 ℃ at the cooling speed of 20 ℃/h-40 ℃ for 1h, discharging and air cooling, and basically eliminating the internal stress of the casting at the moment; annealing is performed above the eutectoid temperature to decompose the infiltrated body into graphite, so it is also called high temperature annealing.
Preferably, the second step: quenching treatment, namely after the stainless steel is quenched, rapidly heating the surface of the stainless steel to 800 ℃, and then carrying out flame spraying and cooling; as a result, a layer of quenched hard material is obtained on the surface layer, the structure of the quenched hard material is martensite and graphite, and the surface hardness of the quenched hard material can reach 50HRC-55 HRC.
Preferably, the step three: aging treatment, during the aging burying process, along with the rise of temperature and the extension of time, recombination of atoms in a supersaturated perisolute dot matrix is performed to generate a solute atom enrichment region (named GPI region) and a GPI region to disappear, second phase atoms are deviated and generate a G-PII region according to a certain rule, then an industry stable second phase (transition phase) is generated, a large number of G-PII regions are combined with a small number of metastable phases, and the metastable phases are converted into stable phases and second phase particles are aggregated; the aging treatment is divided into two categories of natural aging and human-time effect; the natural aging means aging performed at room temperature by aging strengthening. The artificial aging is divided into 3 types of incomplete artificial aging, complete artificial aging and overaging.
Preferably, incomplete artificial aging: heating the casting to 300-470 ℃ and preserving the heat for 3-5 hours to obtain a heat treatment process with better tensile strength, good plasticity and toughness and lower corrosion resistance.
Preferably, the total artificial aging: the casting is heated to 200-270 ℃ and is subjected to heat treatment for 5-24 hours to obtain a heat treatment process with sufficient tensile strength (i.e. the highest hardness) but low elongation.
Preferably, the overaging: the casting is heated to 290 ℃ of 220 ℃ and the temperature is kept for 4-9h, so that the strength is reduced, the plasticity is improved, and the process with better stress resistance and corrosion resistance is obtained.
Compared with the prior art, the invention has the following beneficial effects:
annealing treatment, wherein the annealing for eliminating internal stress usually comprises the steps of heating the casting to 800 ℃/1000 ℃ at the speed of 60-100 ℃ per hour, and preserving the temperature for a period of time, so that the temperature of each part and the surface and the inside of the stainless steel are uniform, and the residual stress is relaxed and stabilized at the temperature; then slowly cooling to about 200 ℃ at the cooling speed of 20 ℃/h-40 ℃ for 1h, discharging and air cooling, and basically eliminating the internal stress of the casting at the moment; annealing at a temperature above eutectoid temperature to decompose the permeant into graphite, heating the stainless steel to a temperature within the range of eutectic melting point and between 750 and 850 ℃, preserving the heat for more than 3 hours to fully decompose soluble phases in the stainless steel, and then rapidly quenching the stainless steel into water at 100 and 120 ℃ to rapidly cool the stainless steel; the strengthening components are dissolved in the alloy to the maximum extent and are fixedly stored in a greenhouse; after the stainless steel is quenched, rapidly heating the surface of the stainless steel to 800 ℃, and then carrying out flame spraying and cooling; as a result, a layer of quenched hard material is obtained on the surface layer, the structure of the quenched hard material is martensite and graphite, and the surface hardness of the quenched hard material can reach 50HRC-55 HRC; cooling the stainless steel to the temperature of between 150 ℃ below zero and 200 ℃ below zero, storing the stainless steel for 3 hours, then heating the stainless steel to the temperature of between 300 ℃ and 500 ℃ to repeatedly shrink and expand the medium solid solution lattice of the stainless steel and to shift the crystal grains of each phase a little so as to enable the atomic segregation areas and the intermetallic compound particles in the solid solution crystal lattice to be in a more stable state, thereby achieving the purpose of improving the size and the volume of the product parts more stably.
Detailed Description
The invention is further described below:
the embodiment is as follows:
the invention provides a stainless steel stress removing and annealing method, which comprises the following steps:
the method comprises the following steps: annealing treatment, namely heating the stainless steel to 800-1000 ℃, preserving heat for 5 hours, cooling the stainless steel to room temperature along with a heating furnace, slowly decomposing the solid solution, and gathering the precipitated second mass points, thereby eliminating the internal stress of the casting and achieving the purposes of stabilizing the size, improving the plasticity and reducing the deformation and the warpage;
step two: quenching treatment, namely heating the stainless steel to the range of eutectic melting point, wherein the temperature is between 750 ℃ and 850 ℃, preserving heat for more than 3 hours to fully decompose soluble phases in the stainless steel, and then rapidly quenching the stainless steel into water at the temperature of 100 ℃ and 120 ℃ to rapidly cool the stainless steel; the strengthening components are dissolved in the alloy to the maximum extent and are fixedly stored in a greenhouse;
step three: aging treatment, namely heating the quenched stainless steel to 800 ℃ with 500 plus materials, preserving the heat for 2 hours, then discharging the stainless steel from the furnace and cooling the stainless steel to room temperature to decompose the saturated solid solution and stabilize the structure of the stainless steel matrix;
step four: and (3) circulating treatment, namely cooling the stainless steel to the temperature of between 150 ℃ below zero and 200 ℃ below zero for 3 hours, then heating the stainless steel to the temperature of between 300 ℃ and 500 ℃ to repeatedly shrink and expand the medium solid solution lattice of the stainless steel and to shift the crystal grains of each phase a little so as to enable the atomic segregation areas and the intermetallic compound particles in the solid solution crystal lattice to be in a more stable state, thereby achieving the purposes of improving the size of the product part and stabilizing the volume.
Preferably, the first step: annealing treatment, wherein the annealing for eliminating internal stress is generally to heat the casting to 800 ℃/1000 ℃ at the speed of 60-100 ℃ per hour, and keep the temperature for a period of time, so that the temperature of each part and the surface and the inside of the stainless steel are uniform, and the residual stress is relaxed and stabilized at the temperature; then slowly cooling to about 200 ℃ at the cooling speed of 20 ℃/h-40 ℃ for 1h, discharging and air cooling, and basically eliminating the internal stress of the casting at the moment; annealing is performed above the eutectoid temperature to decompose the infiltrated body into graphite, so it is also called high temperature annealing.
Preferably, the second step: quenching treatment, namely after the stainless steel is quenched, rapidly heating the surface of the stainless steel to 800 ℃, and then carrying out flame spraying and cooling; as a result, a layer of quenched hard material is obtained on the surface layer, the structure of the quenched hard material is martensite and graphite, and the surface hardness of the quenched hard material can reach 50HRC-55 HRC.
Preferably, the third step: aging treatment, in the aging treatment process, along with the rise of temperature and the extension of time, the atoms in the supersaturated perisolute lattice are recombined to generate a solute atom enrichment area (named GPI area) and a GPI area which disappear, second phase atoms are segregated according to a certain rule to generate a G-PII area, then a stable second phase (transition phase) is generated, and a large number of G-PII areas are combined with a small number of metastable phases and the metastable phases are converted into stable phases and second phase particles are aggregated; the aging treatment is divided into two categories of natural aging and human body aging; the natural aging means aging performed at room temperature by aging strengthening. The artificial aging is divided into 3 types of incomplete artificial aging, complete artificial aging and overaging.
Preferably, incomplete artificial aging: heating the casting to 300-470 ℃ and preserving the heat for 3-5 hours to obtain a heat treatment process with better tensile strength, good plasticity and toughness and lower corrosion resistance.
Preferably, the total artificial aging: the casting is heated to 200-270 ℃ and is subjected to heat treatment for 5-24 hours to obtain a heat treatment process with sufficient tensile strength (i.e. the highest hardness) but low elongation.
Preferably, the overaging: the casting is heated to 290 ℃ of 220 ℃ and the temperature is kept for 4-9h, so that the strength is reduced, the plasticity is improved, and the process with better stress resistance and corrosion resistance is obtained.
Principle of operation
In the invention, annealing treatment, namely annealing for eliminating internal stress usually comprises the steps of heating the casting to 800 ℃/1000 ℃ at the speed of 60-100C/h, and preserving heat for a period of time to ensure that the temperature of each part and the surface and the inside of the stainless steel are uniform, and the residual stress is relaxed and stabilized at the temperature; then slowly cooling to about 200 ℃ at the cooling speed of 20 ℃/h-40 ℃ for 1h, discharging and air cooling, and basically eliminating the internal stress of the casting at the moment; annealing at the temperature above eutectoid temperature to decompose the permeant into graphite, heating the stainless steel to the melting point range of eutectic at the temperature of 750-850 ℃, preserving the heat for more than 3 hours to fully decompose the soluble phase in the stainless steel, and then rapidly quenching the stainless steel into water at the temperature of 100-120 ℃ to rapidly cool the stainless steel; the strengthening components are dissolved in the alloy to the maximum extent and are fixedly stored in a greenhouse; after the stainless steel is quenched, rapidly heating the surface of the stainless steel to 800 ℃, and then carrying out flame spraying and cooling; as a result, a layer of quenched hard material is obtained on the surface layer, the structure of the quenched hard material is martensite and graphite, and the surface hardness of the quenched hard material can reach 50HRC-55 HRC; cooling the stainless steel to the temperature of between 150 ℃ below zero and 200 ℃ below zero, storing the stainless steel for 3 hours, then heating the stainless steel to the temperature of between 300 ℃ and 500 ℃ to repeatedly shrink and expand the medium solid solution lattice of the stainless steel and to shift the crystal grains of each phase a little so as to enable the atomic segregation areas and the intermetallic compound particles in the solid solution crystal lattice to be in a more stable state, thereby achieving the purpose of improving the size and the volume of the product parts more stably.
The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention.
Claims (7)
1. A stainless steel stress removing and annealing method is characterized in that: the method comprises the following steps:
the method comprises the following steps: annealing treatment, namely heating the stainless steel to 800-;
step two: quenching treatment, namely heating the stainless steel to the eutectic melting point range at the temperature of between 750 and 850 ℃, preserving the heat for more than 3 hours to fully decompose a soluble phase in the stainless steel, and then rapidly quenching the stainless steel into water at the temperature of 100 and 120 ℃ to rapidly cool the stainless steel; the strengthening components are dissolved in the alloy to the maximum extent and are fixedly stored in a greenhouse;
step three: aging treatment, namely heating the quenched stainless steel to 800 ℃ with 500-;
step four: and (3) circulating treatment, namely cooling the stainless steel to the temperature of between 150 ℃ below zero and 200 ℃ below zero for 3 hours, then heating the stainless steel to the temperature of between 300 ℃ and 500 ℃ to repeatedly shrink and expand the medium solid solution lattice of the stainless steel and to shift the crystal grains of each phase a little so as to enable the atomic segregation areas and the intermetallic compound particles in the solid solution crystal lattice to be in a more stable state, thereby achieving the purposes of improving the size of the product part and stabilizing the volume.
2. The stainless steel stress relief annealing process of claim 1, wherein: the first step is as follows: annealing treatment, wherein the annealing for eliminating internal stress usually comprises the steps of heating the casting to 800 ℃/1000 ℃ at the speed of 60-100 ℃ per hour, and preserving the temperature for a period of time, so that the temperature of each part and the surface and the inside of the stainless steel are uniform, and the residual stress is relaxed and stabilized at the temperature; then slowly cooling to about 200 ℃ at the cooling speed of 20 ℃/h-40 ℃ for 1h, discharging and air cooling, and basically eliminating the internal stress of the casting at the moment; annealing is performed above the eutectoid temperature to decompose the infiltrated body into graphite, so it is also called high temperature annealing.
3. The stainless steel stress relief annealing process of claim 2, wherein: the second step is that: quenching treatment, namely after the stainless steel is quenched, rapidly heating the surface of the stainless steel to 800 ℃, and then carrying out flame spraying and cooling; as a result, a layer of quenched hard material is obtained on the surface layer, the structure of the quenched hard material is martensite and graphite, and the surface hardness of the quenched hard material can reach 50HRC-55 HRC.
4. The stainless steel stress relief annealing process of claim 1, wherein: the third step is that: aging treatment, in the aging treatment process, along with the rise of temperature and the extension of time, the atoms in the supersaturated perisolute lattice are recombined to generate a solute atom enrichment area (named GPI area) and a GPI area which disappear, second phase atoms are segregated according to a certain rule to generate a G-PII area, then a stable second phase (transition phase) is generated, and a large number of G-PII areas are combined with a small number of metastable phases and the metastable phases are converted into stable phases and second phase particles are aggregated; the aging treatment is divided into two categories of natural aging and human-time effect; the natural aging means aging performed at room temperature by aging strengthening. The artificial aging is divided into 3 types of incomplete artificial aging, complete artificial aging and overaging.
5. The stainless steel stress relief annealing process of claim 4, wherein: incomplete artificial aging: heating the casting to 300-470 ℃ and preserving the heat for 3-5 hours to obtain a heat treatment process with better tensile strength, good plasticity and toughness and lower corrosion resistance.
6. The stainless steel stress relief annealing process of claim 4, wherein: and (3) complete artificial aging: the casting is heated to 200-270 ℃ and is subjected to heat treatment for 5-24 hours to obtain a heat treatment process with sufficient tensile strength (i.e. the highest hardness) but low elongation.
7. The stainless steel stress relief annealing process of claim 4, wherein: and (3) overaging: the casting is heated to 290 ℃ of 220 ℃ and the temperature is kept for 4-9h, so that the strength is reduced, the plasticity is improved, and the process with better stress resistance and corrosion resistance is obtained.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005024071A1 (en) * | 2003-09-03 | 2005-03-17 | Fluor Technologies Corporation | Post weld heat treatment for chemically stabilized austenitic stainless steel |
| CN105714217A (en) * | 2014-12-03 | 2016-06-29 | 重庆业高家具有限公司 | Heat treatment technology of aluminum alloy |
| CN111139345A (en) * | 2019-12-23 | 2020-05-12 | 东台市宏凯不锈钢有限公司 | Heat treatment method of steel |
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- 2022-03-15 CN CN202210252161.4A patent/CN114921623A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005024071A1 (en) * | 2003-09-03 | 2005-03-17 | Fluor Technologies Corporation | Post weld heat treatment for chemically stabilized austenitic stainless steel |
| CN105714217A (en) * | 2014-12-03 | 2016-06-29 | 重庆业高家具有限公司 | Heat treatment technology of aluminum alloy |
| CN111139345A (en) * | 2019-12-23 | 2020-05-12 | 东台市宏凯不锈钢有限公司 | Heat treatment method of steel |
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