Application and research progress of ultra-high strength steel in automotive lightweight

doi:10.13251/j.issn.0254-6051.2023.10.038

Abstract

Abstract: The new generation of automobiles puts forward higher requirements for the use of ultra-high strength steels, which need to have lightweight and better safety performance. The matching of strength and toughness of the ultra-high strength steels is an important way to achieve this goal. The higher the strength of steel, the more prone to brittle fracture. Through matching of the composition design optimization and reasonable heat treatment process, the strength and toughness of the ultra-high strength steel can be effectively improved and the occurrence of accidents can be reduced. Development of hot stamping steel, quenching & partitioning steel, and cold forming martensitic steel was reviewed,the research status of ultra high strength steels in recent years was summarized, reference for the research and development of advanced steels with high strength and high plasticity was provided, and the optimal control ideas for ultra high strength steels was introduced. Finally, the development trend of ultra-high strength steels is forecasted from the aspects of production application and development status of ultra-high strength steels.

Key words: automotive lightweight, ultra-high strength steel, alloying, heat treatment, microstructure, mechanical properties

CLC Number:

TG113.1

Tang Yuanshou, Si Yu, Xu Zhengmeng, Yu Shuoshuo, Cao Pengjun, Li Kejian, Feng Yi, Gao Xiang. Application and research progress of ultra-high strength steel in automotive lightweight[J]. Heat Treatment of Metals, 2023, 48(10): 247-254.

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