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Patent Searching and Data


Title:
MANUFACTURE OF HOT ROLLED STEEL SHEET EXCELLENT IN SURFACE QUALITY
Document Type and Number:
Japanese Patent JPH11156407
Kind Code:
A
Abstract:

To provide a method for manufacturing a hot rolled steel sheet of high Si excellent in surface quality with less red scale flaw.

In advance of hot rolling of a stock slab of a steel sheet containing ≥0.1% Si, a surface temperature T (°C) at the time the rolled stock is taken out of a heating furnace and a time t (s) up to the first descaling by high pressure water after the taking-out are to satisfy a relation: 1170 ≤T-3.01 t, and the energy force of the high pressure water on the sheet surface is to be ≥120 kJ/m2.


Inventors:
OKADA HIKARI
WAKUTA KENICHIRO
Application Number:
JP32802897A
Publication Date:
June 15, 1999
Filing Date:
November 28, 1997
Export Citation:
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Assignee:
SUMITOMO METAL IND
International Classes:
B21B1/26; B21B3/00; B21B45/00; B21B45/08; C21D1/82; (IPC1-7): B21B1/26; B21B3/00; B21B45/00; B21B45/08; C21D1/82
Attorney, Agent or Firm:
Hirose Shoichi