β相区固溶处理对新型TB17钛合金晶粒尺寸及均匀性的影响  

Effect of solution treatment inβ-phase region on grain size and uniformity of a new TB17 titanium alloy

作　　者：丁伟杰 崔霞[1] 姜建飞 贾洪涛 范浩 欧阳德来[1] 李鑫[4] 张可竹 曾祥 DING Wei-jie;CUI Xia;JIANG Jian-fei;JIA Hong-tao;FAN Hao;OUYANG De-lai;LI Xin;ZHANG Ke-zhu;ZENG Xiang(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China;State Grid International Development Limited,Beijing 100010,China;State Grid Jiangxi Electric Power Research Institute,Nanchang 330096,China;School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063 [2]国网国际发展有限公司,北京100010 [3]国网江西省电力有限公司电力科学研究院,江西南昌330096 [4]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《材料热处理学报》2024年第10期50-57,共8页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51261020);江西省自然科学基金(20242BAB25216)。

摘　　要：首先对新型TB17钛合金进行了β相区(900~1050℃)保温不同时间(30~120 min)的固溶处理,并对固溶处理后合金晶粒尺寸进行了统计分析,研究了合金在β相区的晶粒生长行为及均匀性,计算了合金β相生长指数n和生长激活能Q,并建立了β相变点以上的β晶粒生长模型。结果表明,随保温时间的延长,合金β相的晶粒尺寸的变化趋势为先快速增加,后增加速率趋于缓慢。在较低加热温度(900~950℃)下,β晶粒缓慢增长,超过1000℃后,β晶粒快速增长。合金β相区晶粒平均生长指数为0.248,β相区晶粒生长激活能为51.9 kJ/mol;在晶粒尺寸均匀性方面,随保温时间的增加,β晶粒尺寸均匀性增加。保温时间低于60 min时,β晶粒尺寸均匀性差。β晶粒尺寸与保温时间存在幂函数关系。建立了β相变点以上的β晶粒生长模型Dn-D0=13494×t 0.248 exp(-71903/RT),模型计算值与实验数据的平均误差为5.5%。Firstly,the new TB17 titanium alloy was subjected to solution treatment in theβ-phase zone(900-1050℃)for different time(30-120 min),and the grain size of the alloy after solution treatment was statistically analyzed.The grain growth behavior and uniformity of the alloy in theβ-phase region were studied,and theβ-phase growth index n and growth activation energy Q of the alloy were calculated.βgrain growth model above theβ-phase transition point was established.The results show that with the increase of holding time,the change trend ofβgrain size of the alloy is first increase rapidly,and then the increase rate tends to slow down.At lower heating temperatures(900-950℃),theβgrain grows slowly,and above 1000℃,theβgrain grows rapidly.The average grain growth index in theβ-phase region of the alloy is 0.248,and the activation energy of grain growth in theβ-phase region is 51.9 kJ/mol.In terms of grain size uniformity,with the increase of holding time,the uniformity ofβgrain size increases.When the holding time is less than 60 min,the uniformity ofβgrain size is poor.There is a power function relationship between theβgrain size and the holding time.Aβgrain growth model for above theβphase transition point is established:Dn-D0=13494×t 0.248 exp(-71903/RT),and the average error between the calculated values of the model and the experimental data is 5.5%.

关 键 词：新型TB17钛合金 β晶粒生长 均匀性 模型 

分 类 号：TG146.2[一般工业技术—材料科学与工程]