Study of Retained Austenite in Q&P Steel for Automobile

Abstract:

Retained austenite of Q&P (Quenching and Partitioning) processed 0.2C-1.51Si-1.84Mn steel heated in intercritical region and full austenite region are investigated. The results show that the maximum volume fraction of retained austenite heated in intercritical and full austenite region is 13.39% and 5.23% respectively. Carbon partitioning completed within 10 s for both heating modes. The microstructure after full austenitization consisted of martensite laths and thin, inter-lath retained austenite film. Austenite blocks is observed as well after partial austenitization.The distribution of retained austenite is related to the amount of grain boundaries by EBSD techniques.

• Periodical: Advanced Materials Research (Volumes 482-484)
• Pages: 1436-1441
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.482-484.1436
• Online since: February 2012
• Authors: Bao Tong Zhuang, Hai Tao Jiang, Di Tang, Zhen Li Mi, Zhen Kuai
• Keywords: EBSD, Q&P Steel, Retained Austenite

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