Process for manufacturing cold-rolled steel sheets with high-str

Details Process for manufacturing cold-rolled steel sheets with high-str Process for manufacturing cold-rolled steel sheets with high-str

1993-03-16

1994-07-12

Yee, Deborah

Metal treatment

Stock

Ferrous

148603, 148541, C22C 3812, C21D 800

Patent

active

053285280

ABSTRACT:
The primary object of the present invention is to provide a cold-rolled steel sheet with properties of high-strength, high-ductility, and a process for manufacturing it. The constituents of the cold-rolled steel sheet comprise: 0.08%-0.25% carbon by weight, 0.03%-2.0% silicon by weight, 0.6%-1.8% manganese by weight, 0.01%-0.10% niobium by weight, 0.01%-0.08% aluminium by weight, with the rest being substantially iron and unnoticed impurities. The process for manufacturing cold-rolled steel sheets of the present invention by using the molten steel material as described above includes the following steps:

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