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研究了Q1030钢在不同加热温度下的奥氏体晶粒长大现象.在一定温度范围内加热时,Q1030钢的部分奥氏体晶粒异常长大而出现混晶现象.分析了位于不同位置的析出相粒子对阻碍奥氏体晶粒长大的作用,用热力学方法计算不同加热温度下析出相粒子的大小和体积分数,并得出了析出相粒子钉扎阻力随加热温度的变化关系.结果表明,在一定温度范围内钉扎阻力迅速减小,导致部分晶粒异常长大,产生混晶现象.
The austenite grain growth phenomenon of Q1030 steel at different heating temperatures was investigated.When heated in a certain temperature range, part of austenite grains of Q1030 steel grew abnormally and mixed crystal appeared.Analysis of the effect of different grain size Precipitated phase particles impede the growth of austenite grains. The size and volume fraction of precipitated phase particles at different heating temperatures were calculated by thermodynamic method. The relationship between the pinning resistance and the heating temperature of precipitated phase particles was obtained. The results show that the pinning resistance rapidly decreases within a certain temperature range, resulting in the abnormal growth of some of the grains, resulting in mixed crystal phenomenon.