Transactions of Materials and Heat Treatment

Title：Hot stamping process of ultra high strength steel patchworks

Authors： Gao Xiancheng He Dongfang Li Wende Liu Peng Xu Xiaolu

Unit： Dongfeng TQM（WUHAN）Metal Forming Co. Ltd.

KeyWords： ultra high strength steel hot stamping patchworks loose welding welding spot crack

ClassificationCode：TG35;TG44

year,vol(issue):pagenumber：2016,41(9):80-83

Abstract：

Hot stamping process of Ultra High Strength Steel Patchworks (UHSSP) is a complex forming and

quenching technology completed in mold, in which two blanks (USIBOR1500P) of different shapes

and thicknesses are connected with spot welding and then heated to 930-950 ℃. For the

technical difficulties such as loose welding, coating extrusion, welding spot crack, it was

studied the product structure design, forming process and product quality testing etc. by

numerical simulation and parts tryout. The result shows that the patch boundary cannot be

located on the corner of the main parts, the patch parts boundary and the main parts boundary

cannot be on the same plane completely. Then, the spot welding parameters such as welding

current, welding time and cooling time are optimized, and the method for quality inspection is

determined. Furthermore, reinforcement central pillar (B pillar) and double arc pavilion plate

are produced successfully with mass industrial manufacture. The quality and consistency of all

products meet the OEM assembly requirements.

Funds：

湖北省武汉市工业投资和技术改造项目（2012011 237250070）

高宪臣（1977-），男，学士，工程师

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