JPS5613432A - Preparation of unrefined low temperature toughness steel plate - Google Patents
Preparation of unrefined low temperature toughness steel plateInfo
- Publication number
- JPS5613432A JPS5613432A JP8956879A JP8956879A JPS5613432A JP S5613432 A JPS5613432 A JP S5613432A JP 8956879 A JP8956879 A JP 8956879A JP 8956879 A JP8956879 A JP 8956879A JP S5613432 A JPS5613432 A JP S5613432A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- low temperature
- steel plate
- slab
- toughness steel
- 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 obtain a superior low temperature toughness steel plate, by heating the slab having a limited component at a specified temperature range and moreover, rolling under a specified rolling condition.
CONSTITUTION: Slab containing ≤0.20% C, ≤0.50% Si, ≤2.0% Mn, ≤0.1% sol. Al or, if necessary, ≤0.50% Nb, ≤0.15% V, ≤0.5% Mo, ≤1.0% Cu, ≤4% Ni, ≤3% Cr, ≤0.1% Ti; ≤0.1% Zr, ≤0.01% Ca, one or two kinds or more of ≤ 0.01% rare earth metal by wt. and the remainder is Fe and innevitable impurities slab is heated at the Ac3 transformation point or more and ≤1,000°C immediately before rolling. The slab having ≥30% whole rolling reduction is rolled at the Ar1 transformation point or more and Ar3 transformation point or less by ≥1,140ton rolling load per 1m rolling width per one pass. Hereby, unrefined low temperature toughness steel plate having ≤-40°C 85% ductile fracture transition temperature and a supperior toughness at a low temperature is obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8956879A JPS5613432A (en) | 1979-07-13 | 1979-07-13 | Preparation of unrefined low temperature toughness steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8956879A JPS5613432A (en) | 1979-07-13 | 1979-07-13 | Preparation of unrefined low temperature toughness steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5613432A true JPS5613432A (en) | 1981-02-09 |
Family
ID=13974408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8956879A Pending JPS5613432A (en) | 1979-07-13 | 1979-07-13 | Preparation of unrefined low temperature toughness steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5613432A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4565272A (en) * | 1983-02-12 | 1986-01-21 | Nippon Seiko Kabushiki Kaisha | Self-aligning type clutch release apparatus |
-
1979
- 1979-07-13 JP JP8956879A patent/JPS5613432A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4565272A (en) * | 1983-02-12 | 1986-01-21 | Nippon Seiko Kabushiki Kaisha | Self-aligning type clutch release apparatus |
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