热等静压处理对IN792材料组织和持久性能的影响  

Effect of HIP on Microstructure and Stress-rupture Properties of IN792 Alloy

作　　者：盖其东[1] 李相辉[1] 汤鑫[1] 曹腊梅[1] 陈晶阳[1] 

机构地区：[1]北京航空材料研究院先进高温结构材料国防科技重点实验室,北京100095

出　　处：《硅酸盐通报》2012年第3期693-696,共4页Bulletin of the Chinese Ceramic Society

摘　　要：本文研究了热等静压处理对IN792材料组织和持久性能的影响。结果表明,IN792材料经1180℃/150 MPa热等静压处理后显微疏松完全闭合。与直接热处理样品相比,热等静压处理后样品中的共晶含量减少;枝晶干处γ'相的体积分数和尺寸增大,分别由34%,0.4μm增大至42%,0.56μm。760℃/655 MPa和870℃/365 MPa条件下持久性能测试表明,热等静压处理均显著提高了材料的持久寿命。Effect of hot isostatic process （HIP） on microstructure and stress rupture propetries of IN792 alloy had been investigated. The results revealed that all of microporosity are eliminated under the condition of 1190 ℃/170 MPa. The amount of eutectic decrease due to HIP, moreover, the volume fraction of γ＇ phase decrease from 34% to 42% while the size of γ＇ precipitates increase from 0.4 p.m to 0.56 μm after HIP. The investigation of stress-rupture properties at 760 ℃/655 MPa and 870 ℃/365 MPa indicate that the stress rupture life have been obviously imoroved after HIP.

关 键 词：IN792 热等静压 显微组织 持久性能 

分 类 号：TG132[一般工业技术—材料科学与工程]