GH141合金工艺特性研究

Study on Processing Characteristics of Superalloy GH141

研究了GH141变形高温合金的冷加工硬化特性、静态再结晶及热处理对合金硬度、组织的影响。结果表明,GH141合金固溶温度须在1060℃温度以上,在1060℃保温4min硬度才出现较显著下降;冷却速度对硬度影响显著,水冷软化效果明显好于空冷;1000℃以上退火,冷却速度的影响超过了热处理温度的影响,说明冷却过程中析出硬化掩盖了热处理软化效果;γ′大幅度回溶需1050℃以上;冷变形后的合金在1050℃即能完成再结晶,1120℃以上会发生晶粒长大。

In this paper,the cold work hardening characteristics,static recrystallization characteristics and the effect of heat treatment on the hardness and microstructure of GH141 nickel-based deformation superalloy had been studied.The results show that the solution temperature of GH141 alloy must be above 1060℃.The cooling speed has a significant effect on the hardness,and the effect of water-cooling softening is obviously better than air cooling,which shows that precipitation hardening covers the softening effect of heat treatment during cooling.It needs to be heated above 1050℃forγ′large-scale dissolution.The recrystallization of the cold deformed alloy can be completed at 1050℃,and the grain coarsening will occur above 1120℃.