CN115505687A - Solid solution heat treatment process for stainless steel standard part - Google Patents
Solid solution heat treatment process for stainless steel standard part Download PDFInfo
- Publication number
- CN115505687A CN115505687A CN202211073557.9A CN202211073557A CN115505687A CN 115505687 A CN115505687 A CN 115505687A CN 202211073557 A CN202211073557 A CN 202211073557A CN 115505687 A CN115505687 A CN 115505687A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- steel standard
- standard part
- heat treatment
- solution
- 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
Links
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 57
- 239000010935 stainless steel Substances 0.000 title claims abstract description 57
- 238000010438 heat treatment Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000006104 solid solution Substances 0.000 title claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 239000000243 solution Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005260 corrosion Methods 0.000 claims abstract description 9
- 230000007797 corrosion Effects 0.000 claims abstract description 9
- 239000011259 mixed solution Substances 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000005530 etching Methods 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 229940044631 ferric chloride hexahydrate Drugs 0.000 claims description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 3
- NQXWGWZJXJUMQB-UHFFFAOYSA-K iron trichloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].Cl[Fe+]Cl NQXWGWZJXJUMQB-UHFFFAOYSA-K 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims 1
- 230000001376 precipitating effect Effects 0.000 claims 1
- 230000001235 sensitizing effect Effects 0.000 claims 1
- 238000002791 soaking Methods 0.000 claims 1
- 206010070834 Sensitisation Diseases 0.000 abstract description 14
- 230000008313 sensitization Effects 0.000 abstract description 14
- 229910000963 austenitic stainless steel Inorganic materials 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C21D2211/001—Austenite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a solid solution heat treatment process for a stainless steel standard part, which relates to the technical field of solid solution heat treatment, and comprises the following steps: heating the stainless steel standard part to over 900 ℃, preserving heat for half an hour, and then taking out the stainless steel standard part and carrying out solution treatment; in the invention, the austenitic stainless steel after solution treatment has better corrosion resistance, the surface hardness obtained by water cooling after solution treatment is higher than that obtained by air cooling, and the surface is residual compressive stress, thus being beneficial to other mechanical properties. The stainless steel standard part after sensitization is easy to corrode after sensitization; further, the higher the sensitization temperature, the longer the sensitization time, and the greater the tendency of intergranular corrosion after sensitization. Therefore, austenitic stainless steel is necessarily prevented from being carried out in a sensitization region; therefore, the sensitization temperature is set between 600 ℃ and 750 ℃, so that the stainless steel with higher strength and better toughness can be obtained, and the stainless steel is not easy to corrode.
Description
Technical Field
The invention particularly relates to the technical field of solution heat treatment, and particularly relates to a solution heat treatment process for a stainless steel standard part.
Background
The alloy is heated to a suitable temperature and held for a sufficient time to dissolve one or more phases (typically intermetallic compounds) into solid solution, and then rapidly cooled to room temperature. Alloys that have undergone solution heat treatment may have a structure that is a supersaturated solid solution or a solid solution phase that is generally present only at high temperatures, and thus is thermodynamically metastable, with desolventization or other transformations occurring under the appropriate temperature or stress conditions.
The existing solution heat treatment mode is to cool a stainless steel standard part by adopting an air cooling mode, but the cooling mode has poor corrosion resistance and low surface hardness of the stainless steel standard part.
Disclosure of Invention
The invention aims to provide a solution heat treatment process for a stainless steel standard part, which aims to solve the problems that the conventional solution heat treatment method proposed in the background art is generally used for cooling the stainless steel standard part by an air cooling method, but the cooling method has poor corrosion resistance and low surface hardness of the stainless steel standard part.
In order to achieve the purpose, the invention provides the following technical scheme:
a stainless steel standard component solution heat treatment process comprises the steps of heating a stainless steel standard component to over 900 ℃, preserving heat for half an hour, taking out the stainless steel standard component, and carrying out solution treatment; the stainless steel standard part solution treatment comprises air cooling and water cooling; the air cooling can be realized by using an air cooler or a fan to blow air for cooling; the water cooling is to cool and process the metallographic phase of the stainless steel standard component by an etching method; the cooled stainless steel standard is then sensitized.
As a further technical scheme of the invention, during air cooling, the stainless steel standard part is hung on a tool rack, and then three air coolers are used for carrying out surrounding type cooling treatment on the stainless steel standard part, wherein the cooling time is 40-60min.
As a further technical scheme of the invention, during water cooling, the stainless steel standard part is put into the mixed solution for etching treatment for 10min.
As a further technical scheme of the invention, the mixed solution is a mixed solution of 5g ferric chloride hexahydrate, 100mL hydrogen chloride aqueous solution and 500mL ethanol.
As a further technical scheme of the invention, the sensitization treatment is carried out, the stainless steel standard part is heated at 600-750 ℃, chromium atoms in the stainless steel standard part are precipitated along grain boundaries in the form of Cr23C6 carbide, and the grain boundary corrosion sensitivity of the stainless steel standard part is enhanced.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, the austenitic stainless steel after solution treatment has better corrosion resistance, the surface hardness obtained by water cooling after solution treatment is higher than that obtained by air cooling, and the surface is residual compressive stress, thus being beneficial to other mechanical properties.
The sensitized stainless steel standard part is easy to corrode after being sensitized; further, the higher the sensitization temperature, the longer the sensitization time, and the greater the intergranular corrosion tendency after sensitization. Therefore, austenitic stainless steel is necessarily prevented from being carried out in a sensitization region; therefore, the sensitization temperature is set between 600 ℃ and 750 ℃, so that the stainless steel with higher strength and better toughness can be obtained, and the stainless steel is not easy to corrode.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment of the invention, the solid solution heat treatment process of the stainless steel standard part comprises the steps of heating the stainless steel standard part to over 900 ℃, preserving heat for half an hour, taking out the stainless steel standard part, and carrying out solid solution treatment; the stainless steel standard part solution treatment comprises air cooling and water cooling; the air cooling can be realized by using an air cooler or a fan to blow air for cooling; the water cooling is to cool and treat the stainless steel standard part with a metallographic phase by an etching method; the cooled stainless steel standard is then sensitized.
In the embodiment of the invention, during air cooling, the stainless steel standard part is hung on the tool rack, and then three air coolers are used for carrying out surrounding type cooling treatment on the stainless steel standard part, wherein the cooling time is 40-60min.
In the embodiment of the invention, during water cooling, the stainless steel standard part is put into the mixed solution for etching treatment for 10min.
In the embodiment of the invention, the mixed liquid is a mixed liquid of 5g ferric chloride hexahydrate, 100mL hydrogen chloride aqueous solution and 500mL ethanol.
In the embodiment of the invention, the stainless steel standard part is heated at 600-750 ℃ for sensitization treatment, and chromium atoms in the stainless steel standard part are precipitated along grain boundaries in the form of Cr23C6 carbide, so that the grain boundary corrosion sensitivity of the stainless steel standard part is enhanced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A solid solution heat treatment process for a stainless steel standard part is characterized by comprising the following steps: heating the stainless steel standard part to over 900 ℃, preserving heat for half an hour, and then taking out the stainless steel standard part and carrying out solution treatment; the stainless steel standard part solution treatment comprises air cooling and water cooling; the air cooling can be realized by using an air cooler or a fan to cool by blowing; the water cooling is to cool and treat the stainless steel standard part with a metallographic phase by an etching method; the cooled stainless steel standard is then sensitized.
2. The solution heat treatment process of the stainless steel standard component according to claim 1, characterized in that: during air cooling, the stainless steel standard part is hung on the tool rack, then three air coolers are taken to carry out surrounding type cooling treatment on the stainless steel standard part, and the cooling time is 40-60min.
3. A solution heat treatment process for stainless steel standard parts according to claim 2, characterized in that: and when water cooling is carried out, the stainless steel standard part is placed into the mixed solution for soaking for 10min.
4. A solution heat treatment process for stainless steel standard components according to claim 3, characterized in that: the mixed solution is a mixed solution of 5g ferric chloride hexahydrate, 100mL hydrogen chloride aqueous solution and 500mL ethanol.
5. A solution heat treatment process for stainless steel standard parts according to claim 4, characterized in that: and (3) sensitizing treatment, namely heating the stainless steel standard part at 600-750 ℃, and precipitating chromium atoms in the stainless steel standard part along the grain boundary in the form of Cr23C6 carbide, so that the grain boundary corrosion sensitivity of the stainless steel standard part is enhanced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211073557.9A CN115505687A (en) | 2022-09-02 | 2022-09-02 | Solid solution heat treatment process for stainless steel standard part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211073557.9A CN115505687A (en) | 2022-09-02 | 2022-09-02 | Solid solution heat treatment process for stainless steel standard part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115505687A true CN115505687A (en) | 2022-12-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211073557.9A Pending CN115505687A (en) | 2022-09-02 | 2022-09-02 | Solid solution heat treatment process for stainless steel standard part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115505687A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106854687A (en) * | 2015-12-09 | 2017-06-16 | 上海大学 | Reduce the Technology for Heating Processing of austenitic stainless steel sensitization degree |
| CN110195152A (en) * | 2019-06-11 | 2019-09-03 | 河南神州精工制造股份有限公司 | A method of improving austenitic stainless steel anti intercrystalline corrosion ability |
| CN111811912A (en) * | 2020-07-17 | 2020-10-23 | 什邡新工金属材料有限公司 | Metallographic corrosion method for high-carbon martensitic stainless steel grain boundary |
| CN112111637A (en) * | 2020-09-27 | 2020-12-22 | 江油市长祥特殊钢制造有限公司 | Heat treatment method of stainless steel |
| CN114196801A (en) * | 2021-11-29 | 2022-03-18 | 中国科学院金属研究所 | Heat treatment method for improving intergranular corrosion resistance and mechanical property of carbon-controlled austenitic stainless steel |
-
2022
- 2022-09-02 CN CN202211073557.9A patent/CN115505687A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106854687A (en) * | 2015-12-09 | 2017-06-16 | 上海大学 | Reduce the Technology for Heating Processing of austenitic stainless steel sensitization degree |
| CN110195152A (en) * | 2019-06-11 | 2019-09-03 | 河南神州精工制造股份有限公司 | A method of improving austenitic stainless steel anti intercrystalline corrosion ability |
| CN111811912A (en) * | 2020-07-17 | 2020-10-23 | 什邡新工金属材料有限公司 | Metallographic corrosion method for high-carbon martensitic stainless steel grain boundary |
| CN112111637A (en) * | 2020-09-27 | 2020-12-22 | 江油市长祥特殊钢制造有限公司 | Heat treatment method of stainless steel |
| CN114196801A (en) * | 2021-11-29 | 2022-03-18 | 中国科学院金属研究所 | Heat treatment method for improving intergranular corrosion resistance and mechanical property of carbon-controlled austenitic stainless steel |
Non-Patent Citations (1)
| Title |
|---|
| 史勤益;颜余仁;赵先锐;李勤涛;程虎;: "304奥氏体不锈钢的热处理工艺研究", 科学技术与工程, no. 24, pages 176 - 179 * |
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