搅拌磁场强度对Ti-1023合金凝固组织和Fe偏析的影响  

Effect of Stirring Magnetic Field on the Macrostructure and Macrosegregation of Fe Element of Ti-1023 Alloy Ingot

作　　者：何永胜[1,2] 胡锐[1] 罗文忠[2] 孙峰[2] 王凯旋[2] 付宝全[2] 李金山[1] 刘向宏[2] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072 [2]西部超导材料科技股份有限公司陕西省航空材料工程实验室,陕西西安710018

出　　处：《稀有金属材料与工程》2017年第10期3063-3067,共5页Rare Metal Materials and Engineering

摘　　要：研究了工业化制备的超大规格Ti-1023合金铸锭在不同搅拌磁场强度下的纵向凝固组织和Fe元素分布。结果表明:当磁场强度为0.001和0.003 T时,铸锭组织主要由粗大柱状晶,竹节状的小柱状晶和等轴晶组成;当搅拌磁场强度为0.002 T时,凝固组织转变为由粗大柱状晶和细小等轴晶组成。Ti-1023合金铸锭中Fe元素在不同磁场强度下遵循正偏析规律,沿铸锭长度方向Fe元素含量从底部到顶部逐渐增加,沿径向从边缘到中心逐渐增加。随着磁场强度从0.001 T增加到0.003 T,合金元素Fe的宏观偏析率呈现先减小后增大的趋势。The influence of magnetic field on the solidification macrostructure and macrosegregation of Fe element of Ti-1023 alloy ingot was investigated. The results show that when the magnetic field is 0.001 T or 0.003 T, the solidified macrostructure is composed of bulky columnar crystal, small bamboo-like columnar crystal and equiaxed grains. When the magnetic field is 0.002 T, the solidified macrostructure is composed of bulky columnar crystal and fine equiaxed grains. The law of Fe segregation abides positive segregation, Fe content increases gradually from the bottom to the top of ingots along axial direction and from the edge to the center of ingots along radial direction. The macrosegregation rate of Fe element decreases firstly and then increases with the increase of magnetic field from 0.001 T to 0.003 T.

关 键 词：TI-1023合金 搅拌磁场 凝固组织 Fe偏析 

分 类 号：TG146.23[一般工业技术—材料科学与工程]