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.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第12期1249-1252,共4页
Acta Metallurgica Sinica
关键词
铸造高温合金
铸造尺寸效应
加工尺寸效应
cast superalloy K417G, cast size effect, machined size effect, stress-rupture property
