精炼工艺对IN792合金冶金缺陷和拉伸性能的影响

Effects of Refining Processes on Metallurgical Defects and Room Temperature Tensile Properties of Superalloy IN792

调整精炼温度和时间,对不同精炼工艺下高温合金IN792中冶金缺陷及O,N和S等元素含量的变化进行研究;用CS分析仪测定S含量,用TC-436氧氮测定仪测定O和N含量;通过金相显微镜和扫描电镜,对疏松和夹杂物进行观察和测定;并测定拉伸性能。随着O和N含量增加,疏松易于形成;随着O,N和S含量升高,夹杂物含量增加;提高精炼温度和延长精炼时间,O,N和S的含量降低;合金的室温抗拉强度和屈服强度提高。

Metallurgical defects and the changes of O,N and S contents in superalloy IN792 were studied in the different refining processes.S content was measured using CS analysis apparatus,O and N contents were measured by TC-436 measurement apparatus,the mechanical properties of alloy were measured,also.The results show that shrinkage is easier to produce with increasing of O and N contents,and the contents of impurities are increased with increment of the contents of O,N and S.When the refining temperature is higher and refining time is longer,the contents of O,N and S are decreased,the UTS and YS are improved at room temperature.