研究了4种固溶温度:1000、1040和1080和1120℃×4 h,AC(空冷)+双时效(845℃×24 h/AC +760℃×16 h/AC)热处理制度对铸造waspaloy合金组织的影响.结果表明,铸态waspaloy合金组织由γ基体、团状γ’相和MC碳化物组成.固溶处理后,铸态γ'相溶解到基体中,并随固溶温度升高,铸态γ’相含量逐渐减少.当固溶温度大于1080℃时,枝晶形貌消失,铸态γ’相完全溶解;在随后845℃稳定化处理过程中,均匀细小的二次γ’相开始析出,MC碳化物开始分解,并在晶界处析出不连续的粒状M23C6碳化物;经过760℃时效处理后,更多均匀细小的二次γ '相析出并长大.最终确定铸造waspaloy合金的最佳固溶温度应大于1080℃,此时经时效后组织更加均匀一致.
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