基于DD5单晶高温合金制件的时效处理转炉试验

为验证DD5单晶高温合金制件时效处理工艺转入新引进国产真空炉是否满足工艺要求,同时与进口真空炉中完成时效处理后的试样进行对比以确认差异,特开展了时效处理工艺转炉试验。采用DD5单晶高温合金航空发动机涡轮叶片和试棒分别在新引进国产真空炉和进口真空炉中完成时效处理后,分别对叶片的宏观组织、微观组织和表面贫Cr层以及试棒的高温拉伸性能进行了测试与分析。结果表明:在时效处理阶段,国产真空炉与进口真空炉在参数控制能力相当,能够满足DD5单晶合金制件的时效处理要求,可替代进口真空炉完成时效处理。

Converter test of aging treatment based on DD5 single crystal superalloy parts

In order to verify whether the aging treatment process of DD5 single crystal superalloy parts could meet the heat treatment technology requirements after converting to a newly introduced domestic vacuum furnace and at the same time to confirm the difference by comparing with the aging treatment in the imported vacuum furnace, the aging treatment process furnace convertering test was carried out. After the aeroengine turbine blades and tested rods of DD5 single crystal superalloy were aged in the newly introduced domestic vacuum furnace and the imported vacuum furnace respectively, the macrostructure of the blade, the poor chromium layer on the surface, and the tensile properties of the tested bar at high temperature were tested and analyzed. The results show that the parameters control capability of the domestic vacuum furnace is equal to that of the imported vacuum furnace at aging treatment stage, which can meet the requirements of aging treatment for DD5 single crystal alloy parts and replace the imported vacuum furnace to finish the aging treatment.