JPS57161026A - Preventing method for low temperature cracking of martensitic stainless steel - Google Patents
Preventing method for low temperature cracking of martensitic stainless steelInfo
- Publication number
- JPS57161026A JPS57161026A JP4559681A JP4559681A JPS57161026A JP S57161026 A JPS57161026 A JP S57161026A JP 4559681 A JP4559681 A JP 4559681A JP 4559681 A JP4559681 A JP 4559681A JP S57161026 A JPS57161026 A JP S57161026A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- stainless steel
- martensitic stainless
- point
- cooling
- 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
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
- C21D6/02—Hardening by precipitation
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 Treatment Of Articles (AREA)
Abstract
PURPOSE:To prevent the low temp. cracking after hot working quickly and surely through simple operation by cooling a martensitic stainless steel under specific conditions from high temp. and reheating the same then cooling it down to ordinary temp. thereby softening the steel. CONSTITUTION:A martensitic stainless steel is cooled from the high temp. state after hot working down to the temp. region wherein the upper limit is Ms point + 100 deg.C and the lower limit is the higher of Mf point or 100 deg.C, at the cooling rates at which it is not cooled down to the nose of the pearlite transformation. Thence, it is reheated to the temp. below the Ac1 point and is held at this temp. for >=1min to temper the transformed martensite or the residual austenite is converted to pearlite, whereby the residual austenite is converted to low carbon. Next, the steel is cooled down to ordinary temp. so that the transformed martensite of high Ms point is softened by self-tempering. By this method, low temp. cracking is suppressed and the products of the martensitic stainless steel are mass-produced in good yields.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4559681A JPS57161026A (en) | 1981-03-30 | 1981-03-30 | Preventing method for low temperature cracking of martensitic stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4559681A JPS57161026A (en) | 1981-03-30 | 1981-03-30 | Preventing method for low temperature cracking of martensitic stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57161026A true JPS57161026A (en) | 1982-10-04 |
| JPH0143815B2 JPH0143815B2 (en) | 1989-09-22 |
Family
ID=12723725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4559681A Granted JPS57161026A (en) | 1981-03-30 | 1981-03-30 | Preventing method for low temperature cracking of martensitic stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57161026A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5825419A (en) * | 1981-08-07 | 1983-02-15 | Sumitomo Metal Ind Ltd | Preventing method for low-temperature cracking of martensitic stainless steel |
| JPH01127620A (en) * | 1987-11-12 | 1989-05-19 | Kawasaki Steel Corp | Manufacture of martensitic stainless steel |
| KR20020048110A (en) * | 2000-12-16 | 2002-06-22 | 이구택 | Heat treatment method of stainless steel plate |
| JP2009280869A (en) * | 2008-05-23 | 2009-12-03 | Sanyo Special Steel Co Ltd | Method for producing steel product |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5551497A (en) * | 1978-10-09 | 1980-04-15 | Hitachi Zosen Corp | Continuous dredge treatment equipment |
-
1981
- 1981-03-30 JP JP4559681A patent/JPS57161026A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5551497A (en) * | 1978-10-09 | 1980-04-15 | Hitachi Zosen Corp | Continuous dredge treatment equipment |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5825419A (en) * | 1981-08-07 | 1983-02-15 | Sumitomo Metal Ind Ltd | Preventing method for low-temperature cracking of martensitic stainless steel |
| JPH0144768B2 (en) * | 1981-08-07 | 1989-09-29 | Sumitomo Metal Ind | |
| JPH01127620A (en) * | 1987-11-12 | 1989-05-19 | Kawasaki Steel Corp | Manufacture of martensitic stainless steel |
| JPH0579730B2 (en) * | 1987-11-12 | 1993-11-04 | Kawasaki Steel Co | |
| KR20020048110A (en) * | 2000-12-16 | 2002-06-22 | 이구택 | Heat treatment method of stainless steel plate |
| JP2009280869A (en) * | 2008-05-23 | 2009-12-03 | Sanyo Special Steel Co Ltd | Method for producing steel product |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0143815B2 (en) | 1989-09-22 |
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