退火处理对Ti6321合金显微组织与力学性能的影响  

Effect of annealing treatment on microstructure and mechanical properties of Ti6321 alloy

作　　者：康聪 焦振 穆博涛 任驰强 高文超 李维 贠鹏飞 欧阳文博 Kang Cong;Jiao Zhen;Mu Botao;Ren Chiqiang;Gao Wenchao;Li Wei;Yun Pengfei;Ouyang Wenbo(Western Titanium Technologies Co.,Ltd.,Xi'an Shaanxi 710201,China;National and Local Joint Engineering Research Center for Titanium Alloy Processing Technology,Xi'an Shaanxi 710201,China)

机构地区：[1]西部钛业有限责任公司,陕西西安710201 [2]钛合金加工技术国家地方联合工程研究中心,陕西西安710201

出　　处：《金属热处理》2023年第8期149-153,共5页Heat Treatment of Metals

摘　　要：系统分析了Ti6321合金棒材在不同退火制度下的显微组织及室温拉伸、冲击性能。结果表明,当采用单重退火制度时,随着退火温度的升高,初生α相含量呈现先减少后增多再减少的趋势,原始次生α相逐渐减少,强度呈先降低后升高再降低的趋势,冲击吸收能量先降低再升高;采用多重退火制度时,随着第一阶段退火温度的升高,初生α相含量减少,强度降低,冲击吸收能量升高;随着第二阶段退火温度的升高,次生α相片层宽度增加,强度降低,冲击吸收能量升高;采取960℃×80 min/WQ+920℃×80 min/AC+550℃×240 min/AC三重退火制度时,合金具有最佳的强韧性匹配。Microstructure and room temperature tensile and impact properties of Ti6321 alloy bars under different annealing processes were systematically analyzed.The results show that when the single annealing process is adopted,with the increase of annealing temperature,the content of primaryαphase shows a trend of first decreasing and then increasing and finally decreasing,the content of original secondaryαphase gradually decreases,and the strength shows the trend of first decreasing and then rising,and the impact absorbed energy first decreases and then increases.When the multiple annealing process is adopted,with the increase of annealing temperature in the first stage,the content of the primaryαphase decreases,the strength decreases,but the impact absorbed energy increases.With the increase of annealing temperature in the second stage,the width of the secondaryαphase layer increases,the strength decreases,while the impact absorbed energy increases.When the triple annealing system of 960℃×80 min/WQ+920℃×80 min/AC+550℃×240 min/AC is adopted,the alloy has the best strength and toughness matching.

关 键 词：Ti6321合金 退火制度 显微组织 室温拉伸性能 冲击性能 

分 类 号：TG156.1[金属学及工艺—热处理]