Hot-rolled stainless steel strip and method for producing the sa

Details Hot-rolled stainless steel strip and method for producing the sa Hot-rolled stainless steel strip and method for producing the sa

1997-09-29

1999-09-07

Yee, Deborah

Metal treatment

Stock

Ferrous

148608, C22C 3818, C21D 713

Patent

active

059481811

ABSTRACT:
A hot-rolled stainless steel strip contains at least 10 wt % Cr and 1.0 wt % or less of Si, and has a controlled scale thickness of not more than 2.5 .mu.m in the surface layer. The average thickness of the Si-containing oxide layer formed in the scale/alloy substitute interface is 0.1 .mu.m or less. The hot-rolled stainless steel strip is produced by hot rolling at an elongation rate of at least 150 or hot rough rolling to form a sheet bar, descaling by spraying superhigh pressure water to the surface of the sheet bar at an impact pressure (p) of 25 kgf/cm.sup.2 or more and a flow rate density of 0.002 l/cm.sup.2 or more, and then finish rolling so that the maximum reduction ratio per pass satisfies certain disclosed criteria.

REFERENCES:
patent: 5427634 (1995-06-01), Fujita et al.

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