Transactions of Materials and Heat Treatment

Title：Application of the second generation AHSS of TWIP steel for typical automobile parts

Authors： Li Jiumao Chen Xinping Niu Chao

Unit： Research Institute of Baoshan Iron and Steel Co. Ltd. State Key Laboratory of Development and Application Technology of Automotive Steels（BaoSteel）

KeyWords： steel TWIP shock absorber support FEM simulation analysis formability lightweight

ClassificationCode：TG386; TB115

year,vol(issue):pagenumber：2017,42(9):46-50

Abstract：

Developing the high strength steel sheet with high strength and good elongation is of great significance for lightweight and safety improvement of auto. The microstructure, mechanical properties and forming characteristics of HC450/950TW were experimentally studied, and the formability of shock absorber support of HC450/950TW was studied by FEM simulation analysis and stamping test. The results show that the forming performance of TWIP steel is much better than that of QP steel and DP steel at the same strength level. Namely, the elongation of HC450/950TW is more than 50%, and the value of n is more than 0.48. After the shock absorber support being formed by HC450/950TW, the drawing depth of the part achieves 150 mm without cracking and wrinkling, and has a significant lightweight of 2.4 kg. Thus, TWIP steel with high requirements for drawing and expanding is suitable for applying to automobile structure parts.

Funds：

李久茂（1990-），男，硕士研究生，助理工程师 E-mail：lijiumao@baosteel.com

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