对成分为0.11C-0.62 Si-1.65 Mn的低硅TRIP钢不同试验温度下的动态拉伸性能和残余奥氏体的转变行为进行了研究.试验结果表明,两相区热处理温度接近Ac1可以获得较多的铁素体和残余奥氏体,此类试样拉伸试验结果有较高的强塑性配合.110 ℃下的抗拉强度较20 ℃下的降低约300 MPa;均匀伸长率在应变速率1000 s-1左右达到峰值,总伸长率随应变速率提高而单调增加.试验温度为50 ℃和75 ℃下的能量吸收值可达到26000 MPa·%.试验温度越高,残余奥氏体稳定性越好,动态拉伸的绝热效应也抑制了残余奥氏体的形变诱发相变.
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