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

摘要:

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

Abstract:

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.