0Cr13Ni8Mo2Al钢在900～1050℃时的变形组织演变规律研究

Investigation on Deformation Microstructure Evolution of 0Cr13Ni8Mo2Al Steel at 900～1050 ℃

采用Gleeble热模拟试验机,在变形温度900～1050℃和应变量0～0.69条件下对原始等轴组织的0Cr13Ni8Mo2Al钢进行等温恒应变速率(10 s-1)压缩试验,研究了0Cr13Ni8Mo2Al钢变形组织的演化规律。结果表明,在本实验变形条件下,0Cr13Ni8Mo2Al钢在变形过程中没有发生完全再结晶,只发生部分再结晶。当应变量小于0.29时,再结晶非常少;当应变量达到0.29后,再结晶明显增多。当变形温度为900～1000℃时,平均晶粒尺寸随温度的变化较小;在1000～1050℃时,平均晶粒尺寸随温度的变化较大。当应变小于0.29时,平均晶粒尺寸明显地随应变增大而减小;当应变达到0.29时,平均晶粒尺寸缓慢地随应变增大而减小。

Isothermal compression test with constant strain rate（10 s-1） was employed to investigate the microstructure evolution of 0Cr13Ni8Mo2Al steel at the temperatures of 900 ℃～1050 ℃ and the strain range of 0～0.69 by Gleeble simulator.The results show that,under experimental conditions,full recrystallization of 0Cr13Ni8Mo2Al steel does not occur,only partial recrystallization occurs.The amount of recrystallized grains is a little when the strain is below 0.29,but the amount increases obviously after the strain 0.29.The average grain size changes lightly with the temperature at 900 ℃～1000 ℃,while the effect of temperature on grain size is obvious at 1000 ℃～1050 ℃.When the strain is below 0.29,the average grain size decreases obviously with the increase of strain.Nevertheless,after the strain reaches 0.29,the average grain size decreases slowly with the increase of strain.