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研究了热处理对连续点式锻压激光快速成形GH4169合金显微组织和拉伸性能的影响。结果表明,980STA热处理未能使连续点式锻压激光快速成形GH4169合金发生再结晶,合金的拉伸性能达不到锻件标准。经1020STA热处理后,合金发生完全再结晶,等轴晶晶粒尺寸分布均匀,平均晶粒尺寸约为12.8μm,Laves相未被完全固溶,合金的强度和塑性超过锻件标准。1050STA热处理合金的再结晶平均晶粒尺寸约为25.3μm,Laves相完全固溶消失,与1020STA热处理合金相比,合金的强度下降而塑性上升,强度和塑性超过锻件标准。经1080STA热处理后,合金再结晶晶粒尺寸分布不均匀程度明显增大,平均晶粒尺寸约为123.6μm,与1020STA和1050STA热处理合金相比,合金的强度和塑性都大幅度下降,仅与锻件标准相当。
The effect of heat treatment on the microstructure and tensile properties of continuous point forging laser rapid forming GH4169 alloy was studied. The results showed that 980STA heat treatment failed to make recrystallization of GH4169 alloy by continuous point forging laser forging, and the tensile properties of the alloy did not reach forging standard. After 1020STA heat treatment, the alloy was completely recrystallized and the grain size of the equiaxed grains was evenly distributed. The average grain size was about 12.8μm. The Laves phase was not completely dissolved and the strength and plasticity of the alloy exceeded the forging standard. The average recrystallization grain size of the 1050STA heat-treated alloy is about 25.3μm, and the Laves phase completely disappears. Compared with the 1020STA heat-treated alloy, the strength of the alloy decreases and plasticity increases, and the strength and the plasticity exceed the forging standards. Compared with 1020STA and 1050STA heat-treated alloys, the strength and ductility of the alloy decreased sharply after 1080STA heat treatment. The average grain size of the alloy was about 123.6μm, The standard is quite