Title:
HIGH CARBON SLAB FOR SEAMLESS STEEL PIPE AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3487234
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the generation of internal defects without causing the reduction of the productivity even in the case a seamless steel pipe is produced with a high carbon slab as the stock.
SOLUTION: This high carbon slab for a seamless steel pipe contains, by weight, 0.65 to 1.50% C and ≤0.050% P and satisfies the conditions represented by the following inequality: [C]+([P]×100)-FT/10≤1.6, where [C]: the C content (%), [P]: the P content (%), and FT: the time (Hr) for soaking the slab at ≥1100°C before the production of the seamless steel pipe. As to the method for producing a high carbon slab for a seamless steel pipe, at the time of rolling a slab of high carbon contg. 0.65 to 1.50% C and ≤0.050% P and obtd. by a continuous casting method or an ingot making method and producing a slab for a seamless steel pipe, the conditions shown in the above formula are satisfied.
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Inventors:
Koichi Ikeda
Application Number:
JP23549499A
Publication Date:
January 13, 2004
Filing Date:
August 23, 1999
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B21B3/00; C21D8/10; C21D9/00; C22C38/00; C22C38/28; (IPC1-7): C21D8/10; C21D9/00; C22C38/00; C22C38/28
Domestic Patent References:
| JP1180918A | ||||
| JP9249940A |
Attorney, Agent or Firm:
Mikiji Sugioka (2 outside)
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