JPS55110724A - Manufacture of low-carbon hot rolled steel - Google Patents
Manufacture of low-carbon hot rolled steelInfo
- Publication number
- JPS55110724A JPS55110724A JP1606279A JP1606279A JPS55110724A JP S55110724 A JPS55110724 A JP S55110724A JP 1606279 A JP1606279 A JP 1606279A JP 1606279 A JP1606279 A JP 1606279A JP S55110724 A JPS55110724 A JP S55110724A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- hot
- manufacture
- low
- hot rolling
- 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
- Metal Rolling (AREA)
- Continuous Casting (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
PURPOSE: To manufacture hot-rolled steel materials at low cost without causing hot embrittlement with excellent heat efficiency by the procedure in which a specific composition of a low-carbon continuous-cast steel piece is gradually cooled and then directly rolled while it is still hot.
CONSTITUTION: A molten steel, consisting of 0.02W0.12% C, <0.20% Si, 0.10W 0.50% Mn, <0.025% S, <0.025% P, and <120ppm of O2(the oxygen content of a sample taken after rolling), with an Mn/S ratio =6 or more, is subjected to a continuous casting to manufacture a steel piece, e.g., steel slab, etc. Then, the steel piece is gradually cooled to 1000W1180°C at an average cooling rate of 0.80W 0.50°C/sec and then, when reaching the temperature, subjected to a hot rolling without reheating to manufacture a steel material. Thus, the occurrence of flaws in the surface of steel due to hot embrittlement caused by low-melting nonmetal impurities such as FeS-MnS-SiO2, etc. and solid-solution type sulfides during the hot rolling process can be prevented, and also no reheating is applied during the hot rolling process, so that excellent heat efficiency can be attained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54016062A JPS5830366B2 (en) | 1979-02-16 | 1979-02-16 | Manufacturing method for low carbon hot rolled steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54016062A JPS5830366B2 (en) | 1979-02-16 | 1979-02-16 | Manufacturing method for low carbon hot rolled steel |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55110724A true JPS55110724A (en) | 1980-08-26 |
JPS5830366B2 JPS5830366B2 (en) | 1983-06-29 |
Family
ID=11906081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54016062A Expired JPS5830366B2 (en) | 1979-02-16 | 1979-02-16 | Manufacturing method for low carbon hot rolled steel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5830366B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5954453A (en) * | 1982-09-21 | 1984-03-29 | Nippon Steel Corp | Continuous casting method of steel |
EP0153062A2 (en) * | 1984-02-10 | 1985-08-28 | Nippon Steel Corporation | Method for mitigating solidification segregation of steel |
JPS60166150A (en) * | 1984-02-10 | 1985-08-29 | Nippon Steel Corp | Continuous casting method of steel |
US4809765A (en) * | 1984-12-28 | 1989-03-07 | Nippon Steel Corporation | Method for controlling solidification segregation of steel |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52105520A (en) * | 1976-03-02 | 1977-09-05 | Nippon Steel Corp | Continuous casting and continuous hot rolling of aluminium-killed stee l |
-
1979
- 1979-02-16 JP JP54016062A patent/JPS5830366B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52105520A (en) * | 1976-03-02 | 1977-09-05 | Nippon Steel Corp | Continuous casting and continuous hot rolling of aluminium-killed stee l |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5954453A (en) * | 1982-09-21 | 1984-03-29 | Nippon Steel Corp | Continuous casting method of steel |
EP0153062A2 (en) * | 1984-02-10 | 1985-08-28 | Nippon Steel Corporation | Method for mitigating solidification segregation of steel |
JPS60166150A (en) * | 1984-02-10 | 1985-08-29 | Nippon Steel Corp | Continuous casting method of steel |
JPH0245536B2 (en) * | 1984-02-10 | 1990-10-09 | Nippon Steel Corp | |
US4809765A (en) * | 1984-12-28 | 1989-03-07 | Nippon Steel Corporation | Method for controlling solidification segregation of steel |
Also Published As
Publication number | Publication date |
---|---|
JPS5830366B2 (en) | 1983-06-29 |
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