采用超声气体雾化法制备洁净的TiAl预合金粉末,再经粉末除气、封装、热等静压致密化等工序获得TiAl基合金热轧板坯,之后包覆热轧制备粉末冶金TiAl基合金板材.轧制过程中材料的应变、应力状态、温度场分布非常复杂,本实验采用Gleeble热模拟试验机和有限元(FEM)模拟相结合,确定热加工工艺窗口,优选出热轧工艺参数,并热轧得到组织均匀、性能良好、尺寸为220 mm×370 mm×2 mm的粉末冶金TiAl基合金板材.板材室温拉伸性能Rp0.2为608 MPa,Rm为668 MPa,A为2 56％；1 000℃拉伸性能Rp0.2为163 MPa,Rm为330 MPa,A为32.0％；焊接成形性良好,焊缝无缺陷及二次裂纹产生,焊缝区域显微组织与基体差别不大.
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