Development of 780MPa grade gal annealed dual phase steel sheets for automobile

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Jiang, Yinghua^1,2 ; Xie, Chunqian^1,2 ; Kuang, Shuang^1,2

Shougang Research Institute of Technology, Beijing

100043, China^1

Beijing Key Laboratory of Green Recyclable Process for Iron and Steel Production Technology, Beijing

100043, China^2

关键词: Automotive body;    Crash safety;    Dual-phase steel;    Galvannealed;    Hardening capacities;    Retained austenite;    Steel chemistry;    Weight reduction;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/2/022050/pdf
DOI  :  10.1088/1755-1315/108/2/022050

来源: IOP

【 摘 要 】

As the weight reduction of automotive body and crash safety become much more important factors, in an effort to satisfy these requirements, Shougang has developed 780MPa grade galvannealed dual phase steel sheet. Steel chemistry with low C and low Si was designed for good zinc wettability and spot weldability. And some of elements were added to improve the hole expansibility and work hardening capacity of steel as these effectively refine the microstructure and introduce retained austenite. Newly developed 780MPa grade galvannealed dual phase steels have a high yield strength and a good hole expansibility.