JPS57164928A - Production of steel strip - Google Patents
Production of steel stripInfo
- Publication number
- JPS57164928A JPS57164928A JP4726581A JP4726581A JPS57164928A JP S57164928 A JPS57164928 A JP S57164928A JP 4726581 A JP4726581 A JP 4726581A JP 4726581 A JP4726581 A JP 4726581A JP S57164928 A JPS57164928 A JP S57164928A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- steel strip
- steel
- low
- cold
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
Abstract
PURPOSE:To produce a steel strip of high fatigue strength, and small permanent set after repetitive uses by treating the steel strip of carbon steel or low alloy steel at the constant transformation temp., cold rolling draft and low-temp. annealing temp. within the specific ranges. CONSTITUTION:A hot- or cold-rolled steel strip of carbon steel of 0.5-0.9 C and low alloy steel is solution-heat-treated, immediately after which it is subjected to constant temp. transformation preferably within about 10sec within a molten lead bath kept at relatively low temps. of 450-500 deg.C to have uniform and fine lamella pearlite structure. Thence, the steel strip is cold-rolled at 50-80% drafts to be provided with moderate strength and necessary shape characteristics. Thence, it is subjected to low temp. annealing at 200-350 deg.C before it is formed to the prescribed shape or during the course of the forming, whereby the rate of permanent set is reduced, and the steel strip of high strength against the permissible stress and fatigue during use and particularly the breakdown life under high stress amplitude suited for production of springs is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4726581A JPS57164928A (en) | 1981-04-01 | 1981-04-01 | Production of steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4726581A JPS57164928A (en) | 1981-04-01 | 1981-04-01 | Production of steel strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57164928A true JPS57164928A (en) | 1982-10-09 |
Family
ID=12770458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4726581A Pending JPS57164928A (en) | 1981-04-01 | 1981-04-01 | Production of steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57164928A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01184223A (en) * | 1988-01-18 | 1989-07-21 | Nippon Steel Corp | Production of suspension spring for automobile having superior setting resistance at high temperature |
-
1981
- 1981-04-01 JP JP4726581A patent/JPS57164928A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01184223A (en) * | 1988-01-18 | 1989-07-21 | Nippon Steel Corp | Production of suspension spring for automobile having superior setting resistance at high temperature |
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