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采用定量彩色金相、X射线衍射和拉伸试验等方法,研究了热处理工艺及不同的冷轧压下率对低碳Si-Mn系TRIP钢组织和力学性能的影响。结果表明,对于不同的退火温度,再结晶铁素体和二次铁素体的含量不同。当冷轧压下率为55%时,经820℃×110 s+410℃×440 s热模拟工艺后,实验钢中铁素体量约为60%,贝氏体和马氏体量约为34%,残余奥氏体含量约为6%,残余奥氏体的碳含量为1.3%,可以获得好的相变诱发塑性及好的强韧性配合。
The effects of heat treatment process and different cold rolling reduction on the microstructure and mechanical properties of low carbon Si-Mn TRIP steel were studied by quantitative color metallography, X-ray diffraction and tensile test. The results show that for different annealing temperatures, the contents of recrystallized ferrite and secondary ferrite are different. When the cold rolling reduction was 55%, the ferrite content in the experimental steel was about 60% and the bainite and martensite content was about 34 after thermal simulation at 820 ℃ × 110 s + 410 ℃ × 440 s. %, The retained austenite content is about 6% and the residual austenite has a carbon content of 1.3%, good phase transition induced plasticity and good toughness can be obtained.