固溶处理对TC16钛合金显微组织和拉伸性能的影响
Effect of solution treatment on the microstructures and tensile properties of TC16 titanium alloy
作者：刘全明(西安建筑科技大学冶金工程学院)；张朝晖(西安建筑科技大学冶金工程学院)；刘世锋(西安建筑科技大学冶金工程学院)；杨海瑛(西北有色金属研究院)
Author：LIU Quan-Ming(School of Metallurgical Engineering, Xi'an University of Architecture and Technology Research)；ZHANG Zhao-Hui(School of Metallurgical Engineering, Xi'an University of Architecture and Technology Research)；LIU Shi-Feng(School of Metallurgical Engineering, Xi'an University of Architecture and Technology Research)；YANG Hai-Ying(Northwest Institute for Nonferrous Metal)
收稿日期：2013-11-02 年卷（期）页码：2015,52(2):377-382
期刊名称：四川大学学报: 自然科学版
Journal Name：Journal of Sichuan University (Natural Science Edition)
关键字：TC16钛合金; 固溶处理; 显微组织; 拉伸性能
Key words：TC16 titanium alloy; Solution treatment; Microstructures; Tensile properties
基金项目：国家自然科学基金项目(51304153); 西安市工业应用技术研发项目(CX1254⑤)
中文摘要
通过金相显微镜和室温拉伸性能测试, 研究固溶处理对TC16钛合金棒材显微组织和拉伸性能的影响. 结果表明: TC16钛合金低于800℃进行固溶处理, 初始组织为初生α相和亚稳态β相, 随着固溶温度的升高, 亚稳态β相会发生α"马氏体转变, 温度达到900℃时, α"马氏体析出晶界完整的β相, 出现过烧组织, 抗拉强度和屈服强度先降后升, 温度对塑性影响不大. 该合金固溶处理后, 冷镦性能差, 不同的冷却速度使钛合金有不同的α和β相比率, 冷却速度决定β→α转变反应中间相的形成条件, 水淬、空冷、炉冷后的TC16钛合金显微组织和拉伸性能差异较大.
英文摘要
The effects of solution treatment on the microstructures and tensile properties of TC16 titanium alloy were studied by metallurgical microscope and room temperature tensile test. The results show that the initial structures of TC16 titanium alloy are primary ɑ phase and metastable β phase during solid solution treatment under 800℃. With the increase of solid solution temperature, the metastable β phase begins to appear ɑ" martensitic transformation, while solid solution temperature rises to 900℃, β phase of complete grain boundaries is precipitated from ɑ" martensite phase, the overheated structure appears in alloys, and the material tensile strength and yield strength firstly decrease and then increase. The effects of solution temperature on the plastic are small. Solid solution state of TC16 titanium alloy is not suitable for the cold heading forming. Different cooling rate leads the titanium alloy to have different ratio of ɑ to β phases. The cooling speed decides the β→a shift reaction mesophase formation conditions. The microstructure and tensile properties of TC16 titanium alloy are quite different after water quenching, air cooling or furnace cooling
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