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采用有限元方法对热压缩物理模拟过程进行了模拟,分析了接触静摩擦系数、形变量、应变速率对热压缩方向应变及应变速率均匀性的影响,对不同取样位置及分析方向的形变均匀性进行了分析,并观察相对应的原奥氏体晶粒,进行验证。结果表明,试样热压缩方向的应变及应变速率由心部向端部逐步减小,距试样中心1/4位置处最接近设定的应变及应变速率;接触静摩擦系数对试样热压缩方向形变不均匀性影响显著,形变量、应变速率对形变不均匀性的影响较小;推荐自热压方向1/4位置处取样,该处应变及应变速率基本符合设定条件,且形变均匀性最好。
The finite element method was used to simulate the physical process of thermal compression. The effects of static friction coefficient, deformation and strain rate on the uniformity of strain rate and strain rate in hot compression were analyzed. The deformation homogeneity at different sampling locations and analysis directions The analysis and observation of the corresponding original austenite grains were verified. The results show that the strain and strain rate in the direction of hot compression decrease gradually from the center to the end, and are closest to the set strain and strain rate at 1/4 of the center of the specimen. The contact static friction coefficient The effect of deformation and strain rate on deformation inhomogeneity is small. It is recommended to take samples from 1/4 of the hot pressing direction, where the strain and strain rate basically meet the set conditions and the deformation is uniform The best sex.