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Patent Searching and Data


Title:
PRODUCTION OF AUSTENITIC STAINLESS STEEL PIPE
Document Type and Number:
Japanese Patent JPS63238218
Kind Code:
A
Abstract:

PURPOSE: To obtain the titled stainless steel pipe having excellent corrosion resistance and mechanical properties by subjecting the titled steel pipe contg. Ti and/or Nb to hot rolling at a prescribed temp. or below and quick cooling right after hot rolling, then subjecting the steel pipe to final hot rolling and further to quick cooling at a specified cooling rate or above.

CONSTITUTION: The austenitic stainless steel contg. 0.1W0.6wt.% Ti and/or 0.2W1.5wt.% Nb is produced by hot working. The hot working right after the final hot working is executed by hot rolling and at ≤700°C and in this case, the heating temp. thereof is preferably set at (the heating temp. of the final hot rolling + 30°C) W 1,280°C and in succession, the quick cooling is executed. The final hot working of the above-mentioned steel pipe after the quick cooling is executed by hot rolling and the end temp. of said hot rolling is set at ≥950°C to allow carbide to solutionize and work strain to remain. The steel pipe after the end of such hot rolling is in succession cooled at ≥500°C/hr cooling rate, by which the desired austenitic stainless steel pipe having the fine-grained structure is obtd.


Inventors:
YOSHIKAWA KUNIHIKO
SAWARAGI YOSHIATSU
ISEDA ATSURO
SAMEJIMA TOMIO
HIRANO SUSUMU
Application Number:
JP7225787A
Publication Date:
October 04, 1988
Filing Date:
March 26, 1987
Export Citation:
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Assignee:
SUMITOMO METAL IND
International Classes:
C21D8/00; C21D8/10; C22C38/00; C22C38/50; (IPC1-7): C21D8/00; C21D8/10; C22C38/00; C22C38/50