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何永胜,胡锐,罗文忠,孙峰,王凯旋,李金山,刘向宏.磁场强度对Ti-1023合金凝固组织和Fe偏析的影响[J].稀有金属材料与工程(英文),2017,46(10):3063~3067.[He Yongsheng,HuRui,Luo wenzhong,Sun feng,Wang Kaixuan,Li jinshan and Liu xianghong.Effect of Stirring Magnetic Filed on the Macrostructure and Composition of Ti-1023 Alloy Ingot[J].Rare Metal Materials and Engineering,2017,46(10):3063~3067.]
Effect of Stirring Magnetic Filed on the Macrostructure and Composition of Ti-1023 Alloy Ingot
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Received:July 15, 2015  Revised:January 03, 2016
DOI:
Key words: Ti-1023 alloy  Magnetic filed  Solidification microstructure  Fe segregation
Foundation item:中央高校基本科研业务费前沿研究计划(2009QZZD007);湖南省科技重大专项(2010F51004);湖南省研究生科研创新项目(CX2012B044)
Author NameAffiliation
He Yongsheng,HuRui,Luo wenzhong,Sun feng,Wang Kaixuan,Li jinshan and Liu xianghong  
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Abstract:
      Ti-1023 titanium alloy has attracted considerable attentions as aircraft structural material because of its high speci?c strength, good fracture toughness, and excellent stress corrosion resistance and enhanced processing characteristics. However, the shortcoming in Fe element segregation in large specification ingot retarded its practical application. Magnetic filed can be used in overcoming this deficiency at certain degree. In this paper, The influence of magnetic filed on the solidification macrostructure and Fe content of Ti-1023 under vacuum arc remelting was investigated.The results show that when the Magnetic filed T (T=10Gs, T=30Gs) the solidified microstructure is composed of bulky columnar crystal, small bamboo-like columnar crystal and equiaxed grains. When the Magnetic filed T=20Gsthe solidified microstructure is completely composed of bulky columnar crystal and equiaxed grains. The law of Fe segregation abide by normal segregation ,Fe content increases gradually from the bottom to the top of ingots along axial direction and the degree of macro segregation is greater in the radial direction in the middle of the ingot versus the top and bottom., The macrosegregation rate of Fe element increases ?rstly and then decreases with different Magnetic filed.
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