采用金相显微镜(OM)、扫描电子显微镜(SEM)、拉伸试验机等研究了热处理对GH690-Re合金组织与性能的影响.结果表明:与热轧态组织相比,经热处理后GH690-Re合金组织有所粗化.合金的最佳热处理工艺是在1050 ℃固溶45 min+ 720℃时效9h,组织为单相奥氏体基体+γ'析出相,晶粒大小比较均匀.室温条件下材料的抗拉强度为655 MPa,屈服强度为300MPa,合金的高强度主要来源于时效过程中从过饱和固溶体中析出的γ'相引起的析出强化.
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