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
李振亮 1王鑫 1凌思涵 1张志豪 2赵帆2
作者信息
- 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
- 折叠
摘要
以梯形连铸坯A1-5Ti-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)B2、Al7Cu2Fe、TiB2和TiAl3.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,TiAl3平均粒子尺寸逐渐减小而TiB2粒子更趋于弥散分布.第二相粒子TiAl3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TiB2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TiAl3和TiB2的尺寸与分布.
Abstract
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)B2,Al7Cu2Fe,TiB2,and TiAl3,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 TiAl3 particles decreases with increasing the deformation rate(0.01,0.1,1 s-1),while TiB2 particles tend to be more diffusely distributed.The second phase particles TiAl3 are more uniform after transverse compression deformation and finer after longitudinal compression deformation,and the size and distribution of TiB2 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 TiAl3 and TiB2.
关键词
Al-5Ti-1B-0.2Cu/第二相粒子/固溶处理Key words
Al-5Ti-1B-0.2Cu/second phase particles/solid solution treatment引用本文复制引用
基金项目
北京科技大学教育部重点实验室开放项目(2019109)
出版年
2024
NETL
NSTL
万方数据