JPS552732A - Heat treating method for austenitic stainless steel of high resistance against stress corrosion cracking - Google Patents
Heat treating method for austenitic stainless steel of high resistance against stress corrosion crackingInfo
- Publication number
- JPS552732A JPS552732A JP7422378A JP7422378A JPS552732A JP S552732 A JPS552732 A JP S552732A JP 7422378 A JP7422378 A JP 7422378A JP 7422378 A JP7422378 A JP 7422378A JP S552732 A JPS552732 A JP S552732A
- Authority
- JP
- Japan
- Prior art keywords
- stress corrosion
- stainless steel
- austenitic stainless
- corrosion cracking
- stress
- 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.)
- Granted
Links
- 238000005260 corrosion Methods 0.000 title abstract 4
- 230000007797 corrosion Effects 0.000 title abstract 4
- 229910000963 austenitic stainless steel Inorganic materials 0.000 title abstract 3
- 238000005336 cracking Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title 1
- 229910000734 martensite Inorganic materials 0.000 abstract 5
- 230000009466 transformation Effects 0.000 abstract 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 229910003470 tongbaite Inorganic materials 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
PURPOSE:To prevent the generation of stress corrosion cracjing, by cooling the austenitic stainless steel including the sensitized zone due to the heat affection of the welding, etc., to under the Ms point for forming the martensite structure. CONSTITUTION:In the grain boundary of the austenitic stainless steel and the heat affected zone of the welded joint of the same steel, the chronium carbide precipitates forming the so-called sensitized zone, which causes the stress corrosion cracking when it is exposed to the corrosive environment. In this case, the material is cooled using the liquiefied nitrogen, liquiefied oxygen, liquiefied air, etc., down to the martensite transformation beginning point (Ms point ); hereby, the cooled part is transformed into the martensite structure. Hereby, the low chromium part due to the precipitation of the chromium carbide causes the martensite transformation and improves its strength; and besides, depending on the expansion due to the martensite transformation, the residual stress is locally changed from the tensile stress to the compression stress, so that the generation of the stress corrosion cracking is further reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7422378A JPS552732A (en) | 1978-06-21 | 1978-06-21 | Heat treating method for austenitic stainless steel of high resistance against stress corrosion cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7422378A JPS552732A (en) | 1978-06-21 | 1978-06-21 | Heat treating method for austenitic stainless steel of high resistance against stress corrosion cracking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS552732A true JPS552732A (en) | 1980-01-10 |
| JPS623210B2 JPS623210B2 (en) | 1987-01-23 |
Family
ID=13540961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7422378A Granted JPS552732A (en) | 1978-06-21 | 1978-06-21 | Heat treating method for austenitic stainless steel of high resistance against stress corrosion cracking |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS552732A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985335A (en) * | 2015-06-16 | 2015-10-21 | 黄小莲 | Method of reducing thick plate welding residual stress |
| CN113981192A (en) * | 2021-10-27 | 2022-01-28 | 广东海洋大学 | Method for improving yield strength of 304 type metastable austenitic stainless steel |
-
1978
- 1978-06-21 JP JP7422378A patent/JPS552732A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985335A (en) * | 2015-06-16 | 2015-10-21 | 黄小莲 | Method of reducing thick plate welding residual stress |
| CN113981192A (en) * | 2021-10-27 | 2022-01-28 | 广东海洋大学 | Method for improving yield strength of 304 type metastable austenitic stainless steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS623210B2 (en) | 1987-01-23 |
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