Cu对Al-Ti-B梯形连铸坯微观组织的影响  

Effect of Cu on Microstructure of Al-Ti-B Trapezoidal Continuous Casting Billets

作　　者：李振亮[1] 王鑫[1] 凌思涵 张志豪 赵帆 Li Zhenliang;Wang Xin;Ling Sihan;Zhang Zhihao;Zhao Fan(Inner Mongolia University of Science and Technology,Baotou 014010,China;Key Laboratory for Advanced Materials Processing,Ministry of Education,Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]内蒙古科技大学,内蒙古包头014010 [2]北京科技大学新材料技术研究院材料先进制备技术教育部重点实验室,北京100083

出　　处：《稀有金属材料与工程》2024年第6期1749-1760,共12页Rare Metal Materials and Engineering

基　　金：北京科技大学教育部重点实验室开放项目(2019109)。

摘　　要：以梯形连铸坯Al-5Ti-1B-0.2Cu中间合金为研究对象,进行不同温度的固溶处理,然后在不同变形温度、应变速率和变形方向进行热压缩变形。研究Cu元素加入、固溶处理、热压缩对第二相粒子微观组织及尺寸不均匀变形的影响。结果表明:Al-5Ti-1B-0.2Cu中间合金经固溶处理600℃/4 h后第二相粒子共有4类:(Ti,Al)B_(2)、Al_(7)Cu_(2)Fe、TiB_(2)和TiAl_(3)。当Cu存在时,Al-Cu-Fe相生成有利于增多第二相粒子数目。在相同变形程度和变形温度下随变形速率(0.01、0.1、1 s^(-1))增大,TiAl_(3)平均粒子尺寸逐渐减小而TiB_(2)粒子更趋于弥散分布。第二相粒子TiAl_(3)在横向压缩变形后更加均匀,纵向压缩变形后更加细小,横向压缩与纵向压缩后TiB_(2)粒子尺寸、分布情况则基本相同,梯形连铸坯的尺寸不均匀塑性变形更有利于第二相粒子TiAl_(3)和Ti B_(2)的尺寸与分布。The trapezoidal continuous casting billet Al-5Ti-1B-0.2Cu intermediate alloy was used as the research object,and the solution treatment was carried out at different temperatures,and then the thermal compression deformation was carried out at different deformation temperatures and strain rates in various deformation directions.The effects of Cu element addition,solid solution treatment,and hot compression on the microstructure and dimensional inhomogeneous deformation of second phase particles was studied.The results show that there are four types of second phase particles,including(Ti,Al)B_(2),Al_(7)Cu_(2)Fe,TiB_(2),and TiAl_(3),in the Al-5Ti-1B-0.2Cu intermediate alloy after solid solution treatment at 600℃for 4 h.When Cu is present,the Al-Cu-Fe phase is generated to increase the number of the second phase particles.At the same deformation degree and deformation temperature,the average grain size of TiAl_(3) particles decreases with increasing the deformation rate(0.01,0.1,1 s^(-1)),while TiB_(2) particles tend to be more diffusely distributed.The second phase particles TiAl_(3) are more uniform after transverse compression deformation and finer after longitudinal compression deformation,and the size and distribution of TiB_(2) particles after transverse compression and longitudinal compression are basically the same.The dimensional inhomogeneous plastic deformation of the trapezoidal continuous casting billet is more favorable to the size and distribution of the second phase particles TiAl_(3) and TiB_(2).

关 键 词：Al-5Ti-1B-0.2Cu 第二相粒子 固溶处理 

分 类 号：TG146.21[一般工业技术—材料科学与工程]