STEEL PLATE USED FOR HOT STAMPING FORMING, FORMING PROCESS OF HOT STAMPING AND HOT-STAMPED COMPONENT

Title:

STEEL PLATE USED FOR HOT STAMPING FORMING, FORMING PROCESS OF HOT STAMPING AND HOT-STAMPED COMPONENT

Document Type and Number:

WIPO Patent Application WO/2016/131218

Kind Code:

A1

Abstract:

A steel plate used for stamping forming, a forming process of hot stamping and a hot-stamped component. The steel plate used for hot stamping forming comprises 0.18-0.42% of C, 4-8.5% of Mn and 0.8-3.0% of Si+Al, with balance of Fe and unavoidable impurities, wherein the alloy component of the steel plate meets the requirement that the actual measuring value of martensitic transformation starting temperature after hot stamping forming is no more than 280 ℃. The manufacturing process for the hot-stamped component comprises: stamping forming after heating the material to 700-850 ℃; then cooling to the temperature which is 150-260 ℃ lower than the martensitic transformation starting temperature; after tempering heat treatment of heating the hot stamped component to 160-450 ℃ and maintaining for 1-100,000 s, cooling the stamped component to room temperature. The formed component has yield strength≥1200 MPa, tensile strength≥1600 MPa and total elongation percentage≥10%.

Inventors:

YI HONGLIANG (CN)
DU PENGJU (CN)

Application Number:

PCT/CN2015/079748

Publication Date:

August 25, 2016

Filing Date:

May 26, 2015

Export Citation:

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Assignee:

EASYFORMING STEEL TECH CO LTD (CN)

International Classes:

C22C38/06; B21D22/02; B21D37/16; C21D8/04; C22C38/38; C22C38/58

Foreign References:

CN102232123A	2011-11-02
JP2006152427A	2006-06-15
CN103243275A	2013-08-14
CN103397275A	2013-11-20

Other References: