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利用Gleeble-1500热模拟机对TZM粉末冶金板坯进行轧制热模拟研究。在温度为1150~1300℃,变形量为50%,变形速率分别为1,3,5 s-1的试验方案下,采用10 mm×15 mm×20 mm矩形试样,研究了TZM合金板坯的轧制变形抗力与变形温度、变形程度和变形速率之间的关系。结果表明:TZM合金轧制变形抗力随变形温度升高而降低;随着应变速率、变形程度的增大而增大。变形前后的组织分析表明:随着变形量的增加,金相组织微观空洞消失,致密度增大;随变形速率的增大,组织被拉长,晶粒大小趋于均匀化。
Hot rolling simulation of TZM powder metallurgy slab using Gleeble-1500 thermal simulator. Under the test scheme with temperature of 1150 ~ 1300 ℃, deformation of 50% and deformation rates of 1, 3, 5 s-1 respectively, rectangular specimens of 10 mm × 15 mm × 20 mm were used to study the effects of TZM alloy slabs Of the rolling deformation resistance and deformation temperature, the degree of deformation and the relationship between deformation rate. The results show that the rolling deformation resistance of TZM alloy decreases with the increase of deformation temperature, and increases with the increase of strain rate and deformation. The microstructure analysis before and after deformation shows that with the increase of deformation, the microscopic voids disappear and the density increases. With the increase of deformation rate, the structure is elongated and the grain size tends to be uniform.