搅拌磁场强度对Ti-1023合金凝固组织和Fe偏析的影响

发布时间：2018-03-25 08:20

  本文选题：Ti-合金　切入点：搅拌磁场　出处：《稀有金属材料与工程》2017年10期

【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。
[Abstract]:The longitudinal solidification structure and the distribution of Fe elements in the superlarge size Ti-1023 alloy ingot were studied at different agitation magnetic field intensities. The results showed that when the magnetic field strength was 0.001 and 0.003 T, the ingot structure was mainly composed of coarse columnar crystals. When the agitation magnetic field intensity is 0.002 T, the solidification structure is changed from coarse columnar crystal and fine equiaxed crystal composition. The Fe element in the alloy ingot obeys the normal segregation law under different magnetic field intensity. The content of Fe gradually increases from bottom to top along the length of ingot, and from edge to center along radial direction. With the increase of magnetic field strength from 0.001 T to 0.003 T, the macro segregation rate of Fe decreases first and then increases.
【作者单位】： 西北工业大学凝固技术国家重点实验室;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;
【分类号】：TG146.23;TG292
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本文编号：1662289