JPS6473018A - Production of stainless steel having excellent ductility and toughness at cryogenic temperature - Google Patents
Production of stainless steel having excellent ductility and toughness at cryogenic temperatureInfo
- Publication number
- JPS6473018A JPS6473018A JP23135387A JP23135387A JPS6473018A JP S6473018 A JPS6473018 A JP S6473018A JP 23135387 A JP23135387 A JP 23135387A JP 23135387 A JP23135387 A JP 23135387A JP S6473018 A JPS6473018 A JP S6473018A
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- heat treatment
- toughness
- excellent ductility
- production
- 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
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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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 Steel (AREA)
Abstract
PURPOSE:To maintain a high yield point even after a stainless steel contg. Nb is subjected to a heat treatment for forming NbSn and to improve characteristics such as ductility and toughness by subjecting said stainless steel to the heat treatment under specific temp. conditions. CONSTITUTION:The stainless steel having the compsn. consisting, by weight, of <=0.02% C, 0.1-1.0% Si, 0.1-2.0% Mn, 7-15% Ni, 12-20% Cr, 0.5-2.5% Mo, 0.01-0.18% Nb, 0.05-0.25 N, and the balance Fe is smelted by an ordinary method. The stainless steel is first worked at 1,025-1,250 deg.C to solutionize the carbide and nitride. The stainless steel is then finished by hot working at >=1,000 deg.C by taking the recrystallization restoration and the influence on the subsequent aging into consideration. The steel is thereafter cooled down to 800 deg.C at <=1 deg.C/sec average cooling rate and is further cooled at an arbitrary cooling rate to relief the strains after the hot working. The austenitic stainless steel having the excellent ductility and toughness is, therefore, produced without executing a soln. heat treatment and stabilization heat treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23135387A JPS6473018A (en) | 1987-09-16 | 1987-09-16 | Production of stainless steel having excellent ductility and toughness at cryogenic temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23135387A JPS6473018A (en) | 1987-09-16 | 1987-09-16 | Production of stainless steel having excellent ductility and toughness at cryogenic temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6473018A true JPS6473018A (en) | 1989-03-17 |
Family
ID=16922291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23135387A Pending JPS6473018A (en) | 1987-09-16 | 1987-09-16 | Production of stainless steel having excellent ductility and toughness at cryogenic temperature |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6473018A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02258921A (en) * | 1989-03-30 | 1990-10-19 | Nippon Stainless Steel Co Ltd | Production of austenitic stainless steel stock |
| JP2014208911A (en) * | 2008-07-28 | 2014-11-06 | エイティーアイ・プロパティーズ・インコーポレーテッド | Thermal mechanical treatment of ferrous alloys, and related alloys and articles |
-
1987
- 1987-09-16 JP JP23135387A patent/JPS6473018A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02258921A (en) * | 1989-03-30 | 1990-10-19 | Nippon Stainless Steel Co Ltd | Production of austenitic stainless steel stock |
| JP2014208911A (en) * | 2008-07-28 | 2014-11-06 | エイティーアイ・プロパティーズ・インコーポレーテッド | Thermal mechanical treatment of ferrous alloys, and related alloys and articles |
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