Transactions of Materials and Heat Treatment

Title：Hot metal gas forming characteristics of ultra-high strength steel tube and development of A-pillar specimens

Authors： Cheng Chao1 2 Han Fei1 2 Shi Lei1 2

Unit： 1.Research Institute (R&D Center) Baoshan Iron & Steel Co. Ltd. 2.State Key Laboratory of Development and Application Technology of Automotive Steels（Baosteel）

KeyWords： B1500HS ultra-high strength steel hot metal gas forming lightweight A-pillar specimens maximum bulging rate

ClassificationCode：TG394

year,vol(issue):pagenumber：2023,48(5):95-102

Abstract：

1.5 GPa ultra-high strength steel combined with a new forming process can obtain lightweight and high-performance parts. Therefore, for B1500HS ultra-high strength steel, the characteristics of hot metal gas forming were studied, and the hot tensile properties and maximum bulging rate of this ultra-high strength steel were obtained by experimental means, providing guidance and basis for the application in design and development of part. Furthermore, for a typical A-pillar, the part design for the stamping part optimized as a tube was completed, and based on the forming characteristics of B1500HS ultra-high strength steel, the hot metal gas forming process design, simulation analysis and optimization were completed. Finally, the qualified A-pillar samples that met the strength requirements and had a lightweight effect of more than 10% were processed. Thus, the research results provide a feasible demonstration for the automotive industry to adopt hot metal gas formed parts for 1.5 GPa ultra-high strength steel.

Funds：

作者简介：程超（1989-），男，硕士，工程师,E-mail：chengchao198@baosteel.com

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