JPS5480230A - Manufacture of refined steel with above 60 kg/mm2 strength - Google Patents
Manufacture of refined steel with above 60 kg/mm2 strengthInfo
- Publication number
- JPS5480230A JPS5480230A JP14816677A JP14816677A JPS5480230A JP S5480230 A JPS5480230 A JP S5480230A JP 14816677 A JP14816677 A JP 14816677A JP 14816677 A JP14816677 A JP 14816677A JP S5480230 A JPS5480230 A JP S5480230A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- refined
- contg
- strength
- point
- 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
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
PURPOSE: To obtain a refined steel of a strength above 60kg/mm2 with minimized consumption of energy by suitably controlling rolling, heating and cooling conditions of a refined steel contg. a limited amt. of sol. Al and B, V and Mo.
CONSTITUTION: A steel is refined contg. C; 0.03W0.15%, Si; 0.01W0.6%, Mn; 1.2W2%, Mo; 0.01W0.5%, V; 0.01W0.15%, sol. Al; 0.05W0.12% and ≥10× T.N, and B; 0.0005W0.0025%. The steel is heated to 1000W1150°C, hot rolled, cooled from a temp. above the Ar3 point to a cooling end point of 400W650°C at a rate of 10W30°C/ sec, and tempered at 550°CWthe Ac1 point. Thus, a mixed structure is obtd. contg. ferrite, bainite and a small amt. of martensite, and a tempered steel of a strength above 60kg/mm2 can be manufactured with energy consumption corresponding to about 40% of that of a conventional method.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14816677A JPS58731B2 (en) | 1977-12-12 | 1977-12-12 | Method for manufacturing tempered steel having strength of 60Kg/mm↑2 or more |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14816677A JPS58731B2 (en) | 1977-12-12 | 1977-12-12 | Method for manufacturing tempered steel having strength of 60Kg/mm↑2 or more |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5480230A true JPS5480230A (en) | 1979-06-26 |
| JPS58731B2 JPS58731B2 (en) | 1983-01-07 |
Family
ID=15446715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14816677A Expired JPS58731B2 (en) | 1977-12-12 | 1977-12-12 | Method for manufacturing tempered steel having strength of 60Kg/mm↑2 or more |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58731B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013147733A (en) * | 2011-12-21 | 2013-08-01 | Jfe Steel Corp | High tensile strength steel sheet having excellent strength-elongation balance and method for producing the same |
-
1977
- 1977-12-12 JP JP14816677A patent/JPS58731B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013147733A (en) * | 2011-12-21 | 2013-08-01 | Jfe Steel Corp | High tensile strength steel sheet having excellent strength-elongation balance and method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58731B2 (en) | 1983-01-07 |
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