The retained austenite transformation prior to the necking of the example enhanced the uniform elongation rate.
分析认为：残余奥氏体在颈缩发生前的较完全转变有利于提高均匀延伸率；
2
The content and stability of retained austenite is higher after more Mn is added, and also the strength is higher with preferable elongation when the appropriate quenching temperature is chose.