机械搅拌对Al-4TiB_2中间合金组织的影响  

Effects of Mechanical Stirring on Microstructure of Al-4Ti B2 Master Alloy

作　　者：任佳修 张爱民[1] 郭景超 焦劲松 管振强 刘泽鑫 仲艺维 

机构地区：[1]辽宁工业大学材料科学与工程学院,辽宁锦州121001

出　　处：《热加工工艺》2017年第17期73-76,80,共5页Hot Working Technology

摘　　要：采用氟盐法制备了Al-4Ti B_2中间合金,并利用OM、SEM以及XRD等方法研究了机械搅拌对其显微组织的影响。研究结果表明:随着反应温度的提高和保温时间的延长,Al-4Ti B_2中间合金的反应程度逐渐增加;Ti B_2颗粒尺寸随反应温度的升高而逐渐减小,且分布更均匀。但当反应温度过高时,组织中出现灰色大块状的Al B_(12)相。在较高温度下进行机械搅拌不但可获得更细小的Ti B_2颗粒,还可避免有害相Al B_(12)的生成。The effects of mechanical stirring on the microstructure of A1-4TiB2 master alloy produced by halide-salts method were investigated by OM, SEM and XRD. The results show that with the increase of reaction temperature and holding time, the reaction extent of Al-4TiB2 master alloy increases gradually. The size of TiB2 particles decreases gradually with the increase of reaction temperature, and its distribution is more uniform. However, when the reaction temperature is too high, the grey block phase of AlB12 appears in the microstructure. Mechanical stirring at higher temperature can not only get more fine TiB2 particles, but also avoid the formation of harmful phase A lB12.

关 键 词：Al-4TiB2中间合金 机械搅拌 AlB12 

分 类 号：TG292[金属学及工艺—铸造] TG146.21[一般工业技术—材料科学与工程]