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

doi:10.13251/j.issn.0254-6051.2020.05.013

Abstract

Abstract: 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.

Key words: DD5 single crystal superalloy, aging vacuum furnace, microstructure, poor chromium layer, tensile properties

CLC Number:

TG156

Kong Lingli, Zhang Shanqing, Cheng Yifei, Luo Bingwei. Converter test of aging treatment based on DD5 single crystal superalloy parts[J]. Heat Treatment of Metals, 2020, 45(5): 69-73.

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