JPS56123324A - Production of high-strength steel of superior workability - Google Patents
Production of high-strength steel of superior workabilityInfo
- Publication number
- JPS56123324A JPS56123324A JP347881A JP347881A JPS56123324A JP S56123324 A JPS56123324 A JP S56123324A JP 347881 A JP347881 A JP 347881A JP 347881 A JP347881 A JP 347881A JP S56123324 A JPS56123324 A JP S56123324A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- steel
- temp
- cooling
- ferrite
- 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 produce a high-strength steel of improved weldability by working a low C-content steel at ≥30% reduction of area in a temp. range of Ar3 below prescribed temp., and quickly cooling the same in a phase deposition region on the way of cooling thereby providing the two-phase-layerlike structure of ferrite + martensite.
CONSTITUTION: A steel contg. 0.005W0.2% C, 0.3W2.5% Mn and ≤1.0% Si, respectively, is worked at Ar3 point below 930°C within a temp. range at which austenite grains are fined and the recrystallization progression of austenite stagnates considerably and at ≥30% reduction of area. Next, in the ferrite phase deposition temp. region on the way of cooling of the steel after said cooling, C is thickened in the untransformed austenite phase along with the deposition of ferrite phase. After 5W60% deposition as ferrite phase, the untransformed austenite of a high C concn. is quickly cooled, whereby the two-phase-layerlike structure of fine ferrite particles and martensite of a high apparent C concn. is obtained. As a result, the high-toughness, high-tensile steel of superior cold workability having ≥50kg/mm2 tensile strength is obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP347881A JPS56123324A (en) | 1981-01-12 | 1981-01-12 | Production of high-strength steel of superior workability |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP347881A JPS56123324A (en) | 1981-01-12 | 1981-01-12 | Production of high-strength steel of superior workability |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53113804A Division JPS5810442B2 (en) | 1978-09-16 | 1978-09-16 | Manufacturing method for high-toughness, high-strength steel with excellent workability |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56123324A true JPS56123324A (en) | 1981-09-28 |
JPS6339644B2 JPS6339644B2 (en) | 1988-08-05 |
Family
ID=11558438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP347881A Granted JPS56123324A (en) | 1981-01-12 | 1981-01-12 | Production of high-strength steel of superior workability |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56123324A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59170242A (en) * | 1983-03-16 | 1984-09-26 | Nippon Steel Corp | Hot worked steel material containing ultrafine ferrite particles and its production |
JPS59200722A (en) * | 1983-04-26 | 1984-11-14 | Nippon Steel Corp | Production of high tension thick steel plate having excellent toughness |
JPS63189294A (en) * | 1987-02-02 | 1988-08-04 | Sanyo Kokusaku Pulp Co Ltd | Duplication method |
US5213634A (en) * | 1991-04-08 | 1993-05-25 | Deardo Anthony J | Multiphase microalloyed steel and method thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS516811A (en) * | 1974-07-09 | 1976-01-20 | Nippon Steel Corp | Ihoseinonai koenseikokyodokoto sonoseizohoho |
JPS5112317A (en) * | 1974-07-20 | 1976-01-30 | Nippon Steel Corp | Kyodo enseino baransuno suguretakakoyokokyodosukohanno seizohoho |
-
1981
- 1981-01-12 JP JP347881A patent/JPS56123324A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS516811A (en) * | 1974-07-09 | 1976-01-20 | Nippon Steel Corp | Ihoseinonai koenseikokyodokoto sonoseizohoho |
JPS5112317A (en) * | 1974-07-20 | 1976-01-30 | Nippon Steel Corp | Kyodo enseino baransuno suguretakakoyokokyodosukohanno seizohoho |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59170242A (en) * | 1983-03-16 | 1984-09-26 | Nippon Steel Corp | Hot worked steel material containing ultrafine ferrite particles and its production |
JPS6242021B2 (en) * | 1983-03-16 | 1987-09-05 | Nippon Steel Corp | |
JPS59200722A (en) * | 1983-04-26 | 1984-11-14 | Nippon Steel Corp | Production of high tension thick steel plate having excellent toughness |
JPH0573804B2 (en) * | 1983-04-26 | 1993-10-15 | Nippon Steel Corp | |
JPS63189294A (en) * | 1987-02-02 | 1988-08-04 | Sanyo Kokusaku Pulp Co Ltd | Duplication method |
US5213634A (en) * | 1991-04-08 | 1993-05-25 | Deardo Anthony J | Multiphase microalloyed steel and method thereof |
Also Published As
Publication number | Publication date |
---|---|
JPS6339644B2 (en) | 1988-08-05 |
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