JPS5633426A - Manufacture of tempered high tensile steel sheet having excellent low temperature toughness - Google Patents
Manufacture of tempered high tensile steel sheet having excellent low temperature toughnessInfo
- Publication number
- JPS5633426A JPS5633426A JP10778079A JP10778079A JPS5633426A JP S5633426 A JPS5633426 A JP S5633426A JP 10778079 A JP10778079 A JP 10778079A JP 10778079 A JP10778079 A JP 10778079A JP S5633426 A JPS5633426 A JP S5633426A
- Authority
- JP
- Japan
- Prior art keywords
- high tensile
- steel sheet
- temp
- tensile steel
- manufacture
- 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 manufactured tempered high tensile steel sheet excellent in low temp. toughness, by subjecting the steel contg. a small quantity of Nb to the combination of controlled rolling and temper treatment under specific conditions.
CONSTITUTION: A steel contg. <0.20% C, <1.0% Si, <2.0% Mn, 0.015W0.10% Nb, 0.015W0.10% soluble Al, or in addition at least one member among the group <1.0% Cu, <10% Ni, <2% Cr, <1.0% Mo, <0.10% V, <0.10% Ti, <0.01% B is heated to ≥1,150°C where carbide and carbonitride of Nb form solid soln. sufficiently and is primarily rolled at the temp. Then the steel is rolled at ≥65% reduction ratio at ≤900°C, at that time ≥50% the reduction is performed at ≤800°C, the rolling being completed at 750W680°C. In addition it is once cooled to near the room temp., then heated just above the Ac3 transformation temp. and is hardened and tempered.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10778079A JPS5952687B2 (en) | 1979-08-24 | 1979-08-24 | Manufacturing method of tempered high-strength steel plate with excellent low-temperature toughness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10778079A JPS5952687B2 (en) | 1979-08-24 | 1979-08-24 | Manufacturing method of tempered high-strength steel plate with excellent low-temperature toughness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5633426A true JPS5633426A (en) | 1981-04-03 |
| JPS5952687B2 JPS5952687B2 (en) | 1984-12-21 |
Family
ID=14467825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10778079A Expired JPS5952687B2 (en) | 1979-08-24 | 1979-08-24 | Manufacturing method of tempered high-strength steel plate with excellent low-temperature toughness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5952687B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56156716A (en) * | 1980-05-07 | 1981-12-03 | Nippon Kokan Kk <Nkk> | Manufacture of ni-containing steel for low temperature excellent in crack tip opening displacement |
| JPS59129724A (en) * | 1983-01-14 | 1984-07-26 | Nippon Steel Corp | Production of thick walled ultra high tension steel |
| JPS59140355A (en) * | 1983-01-31 | 1984-08-11 | Sumitomo Metal Ind Ltd | Extremely thick steel plate with high toughness and tension |
| US4946515A (en) * | 1987-01-29 | 1990-08-07 | Iscor Limited | High strength, high toughness steel and method of manufacturing thereof |
| JPH04297522A (en) * | 1990-10-01 | 1992-10-21 | Sumitomo Metal Ind Ltd | Production of ultrahigh tensile strength steel for construction use |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60196994A (en) * | 1984-03-19 | 1985-10-05 | 日本電気株式会社 | Connecting system for circuit |
| JPH0510388Y2 (en) * | 1984-11-21 | 1993-03-15 | ||
| JPH049750Y2 (en) * | 1985-05-31 | 1992-03-11 |
-
1979
- 1979-08-24 JP JP10778079A patent/JPS5952687B2/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56156716A (en) * | 1980-05-07 | 1981-12-03 | Nippon Kokan Kk <Nkk> | Manufacture of ni-containing steel for low temperature excellent in crack tip opening displacement |
| JPS59129724A (en) * | 1983-01-14 | 1984-07-26 | Nippon Steel Corp | Production of thick walled ultra high tension steel |
| JPS59140355A (en) * | 1983-01-31 | 1984-08-11 | Sumitomo Metal Ind Ltd | Extremely thick steel plate with high toughness and tension |
| JPH0210219B2 (en) * | 1983-01-31 | 1990-03-07 | Sumitomo Metal Ind | |
| US4946515A (en) * | 1987-01-29 | 1990-08-07 | Iscor Limited | High strength, high toughness steel and method of manufacturing thereof |
| JPH04297522A (en) * | 1990-10-01 | 1992-10-21 | Sumitomo Metal Ind Ltd | Production of ultrahigh tensile strength steel for construction use |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5952687B2 (en) | 1984-12-21 |
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