JPS6455334A - Production of high-tensile steel having low surface hardness - Google Patents
Production of high-tensile steel having low surface hardnessInfo
- Publication number
- JPS6455334A JPS6455334A JP21116087A JP21116087A JPS6455334A JP S6455334 A JPS6455334 A JP S6455334A JP 21116087 A JP21116087 A JP 21116087A JP 21116087 A JP21116087 A JP 21116087A JP S6455334 A JPS6455334 A JP S6455334A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- bainite
- temp
- strains
- tensile
- 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
Abstract
PURPOSE:To easily obtain the title high-tensile steel without stress corrosion cracking and capable of withstanding severe bending by changing only the surface layer of the steel consisting essentially of bainite to ferrite structure. CONSTITUTION:When a low-carbon steel or a low-carbon low alloy steel is hot-rolled and the hot rolling temp. is controlled to a temp. higher than the Ar3 point, the steel is worked in the uncrystallized austenite region and then immediately quenched. As a result, the structure of the steel is changed to a structure consisting essentially of bainite or of bainite plus martensite. The strains more than the transformation strains and thermal strains are left on the steel surface layer in this way, and then the steel is annealed at a temp. lower than the Ac1 point, and/or stress-relieved. By this method, only the structure of the steel surface is changed to ferrite. consequently, a high-tensile steel without stress corrosion cracking, capable of withstanding severe bending, and having >=60kgf/mm<2> tensile strength is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21116087A JPS6455334A (en) | 1987-08-25 | 1987-08-25 | Production of high-tensile steel having low surface hardness |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21116087A JPS6455334A (en) | 1987-08-25 | 1987-08-25 | Production of high-tensile steel having low surface hardness |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6455334A true JPS6455334A (en) | 1989-03-02 |
Family
ID=16601389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21116087A Pending JPS6455334A (en) | 1987-08-25 | 1987-08-25 | Production of high-tensile steel having low surface hardness |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6455334A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996009419A1 (en) * | 1994-09-20 | 1996-03-28 | Kawasaki Steel Corporation | Bainite steel material of little scatter of quality and method of manufacturing the same |
CN113201682A (en) * | 2021-04-15 | 2021-08-03 | 华南理工大学 | Bainite weathering steel and production method thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62211048A (en) * | 1986-03-12 | 1987-09-17 | 株式会社東芝 | Ultrasonic diagnostic apparatus |
JPS6455333A (en) * | 1987-08-25 | 1989-03-02 | Nippon Kokan Kk | Production of high-tensile steel having excellent arresting characteristic |
-
1987
- 1987-08-25 JP JP21116087A patent/JPS6455334A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62211048A (en) * | 1986-03-12 | 1987-09-17 | 株式会社東芝 | Ultrasonic diagnostic apparatus |
JPS6455333A (en) * | 1987-08-25 | 1989-03-02 | Nippon Kokan Kk | Production of high-tensile steel having excellent arresting characteristic |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996009419A1 (en) * | 1994-09-20 | 1996-03-28 | Kawasaki Steel Corporation | Bainite steel material of little scatter of quality and method of manufacturing the same |
CN113201682A (en) * | 2021-04-15 | 2021-08-03 | 华南理工大学 | Bainite weathering steel and production method thereof |
CN113201682B (en) * | 2021-04-15 | 2022-05-24 | 华南理工大学 | Bainite weathering steel and production method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES8703530A1 (en) | Controlled rolling process for dual phase steels and application to rod, wire, sheet and other shapes. | |
RU94006015A (en) | Method to produce high-strength rails of steels with bainite structure and high strength rail with bainite structure | |
MX9708775A (en) | Process for producing high-strength seamless steel pipe having excellent sulfide stress cracking resistance. | |
US4938266A (en) | Method of producing steel having a low yield ratio | |
CA2086283A1 (en) | Low-yield-ratio high-strength hot-rolled steel sheet and method of manufacturing the same | |
Pickering | The Spectrum of Microalloyed High-Strength Low-Alloy Steels | |
DE69606227T2 (en) | Titanium-containing hot-rolled, high-strength steel sheet with good deep-drawing ability, and process for its production | |
JPS6455334A (en) | Production of high-tensile steel having low surface hardness | |
EP0033600A3 (en) | Process for producing a steel with dual-phase structure | |
JPS5573848A (en) | High strength steel for welded structure with superior sulfide stress corrosion cracking resistance | |
US3502514A (en) | Method of processing steel | |
JPS6468422A (en) | Production of high tensile steel plate for building | |
Hayami et al. | Recent Developments in Formable Hot- and Cold-Rolled HSLA Including Dual-Phase Sheet Steels | |
JPS5677329A (en) | Production of composite structure high tensile cold-rolled steel plate of superior workability | |
JPS6455333A (en) | Production of high-tensile steel having excellent arresting characteristic | |
US5180204A (en) | High strength steel pipe for reinforcing door of car | |
JPS57123957A (en) | High-strength cold-rolled steel plate and its manufacture | |
JPS6425946A (en) | Steel plate having excellent workability and toughness as well as having good hardenability and its production | |
JPS6452019A (en) | Production of high tensile steel having low surface hardness | |
JPS5690921A (en) | Production of low temperature steel having superior toughness and hydrogen induced crack resistance characteristic | |
JPS57123956A (en) | High-strength cold-rolled steel plate and its manufacture | |
JPS5531123A (en) | Manufacture of hot rolled steel plate of composite structure having superior corrosion resistance, low yield ratio and high strength | |
JPS5719321A (en) | Improvement for sulfide stress corrosion cracking of low alloy steel | |
JPS5747832A (en) | Production of high strength cold rolled steel plate of superior deep drawability and working embrittleness resistance | |
Stevenson | Crack initiation and propagation in thermal mechanically treated sheet steels |