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通过热模拟试验测定了X60级管线钢以 0 1～ 2 0s-1的应变速率在 90 0～ 1 0 5 0℃温度区间压缩变形过程中的真应力 -真应变曲线 ,观察了变形后空冷至室温的显微组织 .结果表明 :在此变形条件下 ,材料没有发生动态再结晶 ,但随着变形温度的升高和变形速率的下降 ,将出现动态回复现象 ;低温和大变形速率变形能细化铁素体晶粒组织 .
The true stress-strain curves of X60 grade pipeline steel during the compressive deformation at the temperature range of 90 0 ~ 105 0 ℃ at 0 1 ~ 2 0s-1 strain rate were determined by thermal simulation test. Room temperature.The results show that the dynamic recrystallization does not occur under this deformation condition, but the dynamic recovery will occur with the increase of the deformation temperature and the deformation rate, and the deformation energy of the low temperature and the large deformation rate will be fine Ferritic grain structure.