K77 合金的组织和性能研究

The Investigation of Microstructrue and Properties of K77 Alloy

研究了Ｋ７７合金不同热处理状态对其组织和性能的影响，发现适当提高固溶温度可以提高合金的持久寿命。本试验中合金的性能均较美国Ｒｅｎｅ７７合金公布的力学性能高。还发现Ｋ７７合金具有较好的组织稳定性，主要表现在高温时效时γ′间距λ及尺寸ａ变化不大，另外碳化物反应ＭＣ＋γ→Ｍ２３Ｃ６＋γ′对合金有一定的增强作用，抑制了性能的下降。

The effect of different heat treatment on microstructure and properties of K77 alloy was investigatedThe results show that proper increasing of solution temperature can improve the stressrupture life of the alloyThe properties of the alloy in the experiment are better that of Rene77in USAIt is also discover that the microstructure stability is good,the change of distance (λ) between γ′ and size (a)of γ′ is not apparent and the carbide reaction MC+γ→M23C6+γ′ restraints the lower of the properties