FGH96合金微观组织和力学性能调控

Microstructure and Mechanical Properties of FGH96 Alloy

利用电子探针、场发射扫描电镜等检测手段分析了粉末冶金FGH96合金在不同固溶热处理条件下的组织演变和力学性能。结果表明:粉末冶金FGH96合金涡轮盘边缘部分可观察到亮白色颗粒状的硼化物相,经EDS前测试了元素面扫描图像,可以判定硼化物相主要为富含元素W和Mo;随着固溶温度从1080℃升高至1160℃,抗拉强度和屈服强度都小幅度增加,而随着冷却速率的增加,抗拉强度和屈服强度相应增加;通过不同固溶温度处理后FGH96合金的蠕变性能相当,而随着冷却速率的增加,蠕变抗力大大增加。

The microstructure evolution and mechanical properties of powder metallurgy FGH96 alloy under different solution heat treatment conditions were analyzed by electronic probes, field emission scanning electron microscopy and other advanced detection methods. The results show that bright white granular boride phase is observed in the edge of the powder metallurgy FGH96 alloy turbine disk by electron probe. According to the scanning results of the control element, it can be ascertained that the boride phase is mainly rich in elements W and Mo. As the solution temperature increases from 1080 to 1160 °C, both tensile strength and yield strength increase slightly, and they increase with increasing cooling rate. FGH96 alloy after the treatment with different solution temperatures exhibits comparable creep performance;however, as the cooling rate increases, the creep resistance is greatly increased.