Patent ID: 11939651
Assignee: POSCO CO., LTD
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 8:
9. A method of manufacturing a hot press formed part, the method comprising:
welding an Al—Fe alloy plated steel sheet of claim 1 to a steel sheet having a thickness or a strength different from a thickness or a strength of the Al—Fe alloy plated steel sheet to form a tailer welded blank;
heating the tailer welded blank to a temperate within a range of (Ae3+30° C.) to (Ae3+150° C.) at a heating rate of 1 to 1000° C./sec and then maintained for 1 to 1000 seconds to form a heated tailer welded blank; and
hot press forming the heated tailer welded blank while simultaneously cooling at a cooling rate of 1 to 1000° C./sec.