基于三态组织的近α钛合金近β锻+固溶时效工艺参数匹配  

Parameter Matching of Near-β Forging+Solution and Aging Treatment for Near-α Titanium Alloy with Tri-modal Microstructure

作　　者：印志坤 王昌 孙志超[1] 黄龙[1] 王钰 尹丽娇 Yin Zhikun;Wang Chang;Sun Zhichao;Huang Long;Wang Yu;Yin Lijiao(School of Materials Science and Engineering,Northwestern Polytechnical University,Xian 710072,China;Shaanxi Key Laboratory of Biomedical Metal Materials,Northwest Institute for Nonferrous Metal Research,Xian 710016,China)

机构地区：[1]西北工业大学材料学院,陕西西安710072 [2]西北有色金属研究院陕西省医用金属材料重点实验室,陕西西安710016

出　　处：《稀有金属材料与工程》2022年第7期2409-2419,共11页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China (52075447)。

摘　　要：基于正交试验结果,对近β锻+固溶时效工艺参数进行了显著性分析,并详细讨论了工艺参数对TA15钛合金显微组织的影响及合理的工艺参数,以获得性能优异的三态组织。结果表明:变形温度、固溶温度和固溶时间是3个最为重要的工艺参数,分别对等轴α相的体积分数和直径、片层α相的体积分数及片层α相的厚度影响最大。较合理的TA15钛合金处理工艺参数为970℃/0.1 s^(-1)/60%变形程度/水淬+930℃/1.5 h/空冷+550℃/5 h/空冷。Based on the orthogonal experiment results, the significance of process parameters of near-β forging+solution and aging was analyzed. The effect of process parameters on the microstructure of TA15 alloy was discussed, and the proper process parameters were obtained to achieve the tri-modal microstructure with excellent properties. Results show that the deformation temperature,solution temperature, and solution duration are the most important process parameters, which affects mostly the volume fraction and diameter of the equiaxed αphase, the volume fraction of the lamellar αphase, and the thickness of the lamellar αphase,respectively. The optimal processing parameters are 970 ℃/0.1 s^(-1)/deformation degree of 60%/water quenching+930 ℃/1.5 h/air cooling+550 ℃/5 h/air cooling.

关 键 词：近Α钛合金 正交实验 近Β锻造 固溶时效处理 三态组织 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TG156.94[金属学及工艺—金属材料]