固溶温度和冷却方式对转子用改型IN617合金晶粒尺寸及碳化物的影响

Effect of Solid Solution Temperature and Cooling Manner on Grain Size and Carbide of Modified IN617 Alloy Used for Rotor

研究了不同固溶处理温度和冷却方式对转子用改型IN617合金晶粒尺寸及碳化物的影响。结果表明,随着固溶处理温度的升高,M_(23)C_6和M_6C先后回溶到基体中,且固溶温度高于1180℃时,细小的MC也可回溶。当晶界M_6C完全回溶到基体中后,失去钉扎作用的晶粒在高于1140℃的温度保温时会快速长大。固溶处理后较慢的冷速会使得晶界析出连续的碳化物,从而影响材料的力学性能。

Effects of different solid solution treatment temperatures and cooling manners on grain size and carbides of modified IN617 alloy used for rotor have been researched. The results showed that as the solid solution temperature increasing, M23 C6 and M6C redissolved into the matrix in turn, furthermore when the solid solution temperature exceeded 1180℃ , smaller MC could redissolve, while grain boundary M6 C redissolved totally into the matrix, the grain with- out pinning could grow up rapidly above 1140℃. Successive carbides separated out from the boundalT in the condition of slower cooling rate after solid solution treatment, which influenced mechanical property of the material.