热处理对Ti-Nb-Cr-Al系钛合金力学性能的影响
杜素梅, 潘存海
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作者单位：天津科技大学 机械工程学院, 天津 300222
中文关键字：钛合金； 固溶处理； 时效处理； 微观组织； 力学性能
英文关键字：titanium alloy; solution treatment; aging treatment; microstructure; mechanical property
中文摘要：研究了固溶处理和时效处理对新型Ti-Nb-Cr-Al系钛合金力学性能的影响，并用环境扫描电镜(ESEM)进一步分析了钛合金组织、断口形貌与力学性能之间的关系。结果表明：时效处理没有改变热轧态的纤维组织形态，但由于有大量弥散相析出，其强度和弹性模量显著提高，塑性明显降低。通过优化固溶处理与时效处理可以获得良好的综合力学性能，其弹性模量对显微组织形态比较敏感。
英文摘要：The influence of solution and aging treatment on the mechanical properties of a new type of Ti-Nb-Cr-Al system titanium alloy was studied. The relationships between microstructure, fracture images and mechanical properties were analyzed by environment scanning electron microscope (ESEM). The results show that the microstructure of hot rolling state is not changed by aging treatment, but there are lots of micro-size dispersion phase precipitate along the rolling fiber direction so that the strength and Young's modulus of the alloy significantly increase, and its plastic property obviously decreases. Ti-Nb-Cr-Al system titanium alloy can acquire good integrated mechanical property by optimum solution and aging treatment processing. The Young's modulus is very sensitive to the microstructure.