铸造2025，Vol.74Issue(12)：1543-1548,6.
热过程对透平叶片定向凝固合金DZ409组织和性能的影响
Effect of Thermal Process on Microstructure and Properties of Directionally Solidified Alloy DZ409 for Turbine Blades
摘要
Abstract
The microstructures and tensile properties of DZ409 alloys after different heat treatment processes H1,H2,and H3,including solid solution,brazing,diffusion layer,coating,primary aging,and secondary aging(H1:Standard heat treatment;H2:Solution treatment+Brazing+Aging treatment;H3:Brazing+Solution treatment+Diffusion layer+Coating+Aging treatment)had been investugated.The results indicated that after the H2 heat treatment,carbides and γ/γ' eutectic exhibit reduced dimensions,with further refinement observed in H3 samples.The average size of γ' phase were 300 nm,520 nm,400 nm and the volume fraction were 50％,55％,and 42％ after the heat treatment H1,H2 and H3,respectively.The compositions of carbides and the dendritic γ' precipitates were nearly similar.The tensile elongations at room temperature after heat treatments H1,H2,and H3 were nearly identical.Compared with those of the H1 heat treatment,the tensile strength of the samples after H2 heat treatment approximately decreased by 1.8％,and the yield strengths approximately decreased by 6.7％.For the H3 heat treatment,the tensile strength changes little,with an increase 10％ in yield strength,while the section shrinkage ratio approximately decreased by 30％.The variations in strengths were primarily attributed to the differences in the size and volume fraction of γ' phase.The results provided valuable references for optimizing heat treatment processes in blade production.关键词
DZ409合金/γ'相/热处理/显微组织/力学性能Key words
DZ409 alloy/γ' phase/heat treatment/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
邢静,丛健,侯介山,周兰章..热过程对透平叶片定向凝固合金DZ409组织和性能的影响[J].铸造,2025,74(12):1543-1548,6.基金项目
国家科技重大专项(HT-J2019-VI-0020-0136). （HT-J2019-VI-0020-0136）
