Patent ID: 9498810
Filing Date: 2016-11-22
CPC Classification: B21D,B32B,C21D,C22C,C23C,C25D,G01N

Claim Text:
1. A method for manufacturing warm press-formed members, comprising heating a steel sheet to a temperature in the range from 200 to 800° C. and warm press-forming the steel sheet at a temperature in the above range of temperatures, the steel sheet having a lower coating layer and a Zn—Ni alloy coating layer in this order on the surface of the steel sheet, the lower coating layer including not less than 60 mass % Ni and the balance being Zn and inevitable impurities and having a coating weight of 0.01 to 5 g/m 2 , the Zn—Ni alloy coating layer including 10 to 25 mass % Ni and the balance being Zn and inevitable impurities and having a coating weight of 10 to 90 g/m 2 .