高温热处理对Mo-0.9La合金板材组织及力学性能的影响

Effects of High Temperature Heat Treatment on Microstructure and Mechanical Properties of Mo-0.9La Alloy Sheets

摘要: 采用粉末冶金法制备97%以上变形量的Mo-0.9La板材，研究了不同热处理温度对Mo-0.9La合金板材组织和力学性能的影响。结果表明，随着热处理温度的升高，Mo-0.9La合金的微观组织从细密的纤维组织粗化至35 μm左右的板条状搭接组织，Mo-0.9La合金的抗拉强度、屈服强度与硬度降低。在1500℃时，Mo-0.9La合金的伸长率最高，达到22%。

Abstract: Mo-0.9La alloy sheets with large deformation(over 97%)were prepared by powder metallurgy technology.The effects of different heat treatment temperatures on the microstructure and mechanical properties of Mo-0.9La alloy sheets were studied. The results show that, with the increase of heat treatment temperature, the microstructure of Mo-0.9La alloy transforms from fine fibre to lath structure, which is about 35 μm, and the tensile strength, yield strength and hardness of Mo-0.9La alloy decrease.At 1500 ℃, the elongation of Mo-0.9La alloy is highest, reaching 22%.