K417G铸造高温合金的尺寸效应对组织和性能的影响  

THE EFFECT OF SPECIMEN SIZE ON MICROSTRUCTURESAND PROPERTIES OF CAST SUPERALLOY K417G

作　　者：徐岩[1] 郭守仁[1] 卢德忠[1] 王玉兰[1] 郑启[1] 胡壮麒[1] 

机构地区：[1]中国科学院金属研究所,沈阳110015

出　　处：《金属学报》1999年第12期1249-1252,共4页Acta Metallurgica Sinica

摘　　要：研究了铸造尺寸效应和加工尺寸效应对铸造高温合金Ｋ４１７Ｇ高温性能的影响，结果表明、未经机械加工的Ｋ４１７Ｇ合金薄壁试样的高温持久性能与标准试样相当，无薄壁效应；而经大余量机械加工得到的薄壁试样，其高温持久性能下降。The effects of specimen size in original as-cast form and machined form on hightemperature properties of cast superalloy K417G have been studied. The results show that hightemperature stress-rupture life of original as-cast thin-wall specimens is nearly equal to that of the standardones, i.e. there is not thin-wall effect. However, the high-temperature stresss-rupture life of thin-wall specimens machined from thick-wall ones decrease, i.e. the thin-wall effect. More microporosities and less thenumber of grains in the cross section of machined thin-wall mainly cause the decrease of properties.

关 键 词：铸造高温合金 铸造尺寸效应 加工尺寸效应 

分 类 号：TG132.32[一般工业技术—材料科学与工程] TG146.15[金属学及工艺—合金]