Research and Development of 780MPa grade low-density steels

2nd International Conference on Frontiers of Materials Synthesis and Processing

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

Research Institute of Technology, Shougang Group Co. Ltd, Beijing, China^1

Beijing Key Laboratory of Green Recyclable Process for Iron and Steel Production Technology, Beijing, China^2

关键词: Austenite deformations;    Automotive body;    Delta ferrite;    Low density;    Research and development;    Retained austenite;    Strength and ductilities;    Weight reduction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/493/1/012120/pdf
DOI  :  10.1088/1757-899X/493/1/012120

来源: IOP

【 摘 要 】

In order to meet the weight reduction of automotive body, low density steels containing about 4wt.% of Al have been newly developed. The microstructure of low-density steel, comprising a mixture of blocky retained austenite, bainite, δ-ferrite and α-ferrite, was produced using a laboratory annealing simulator. The low-density steel exhibits good combination of strength and ductility, whose properties shows tensile strength of 810MPa with elongation of 27.4%. Its extraordinary properties are obtained from δ-ferrite and austenite deformation induced martensite.