(中国船舶重工集团公司，洛阳 471039)
摘 要: 分析了Ti-1023钛锭中铁元素偏析的原因以及改善措施，通过合理控制原材料规格、混料方式、熔炼次数及熔炼参数，采用真空自耗电弧炉熔炼出直径为400 mm的Ti-1023铸锭。成分分析显示，钛锭上端面Fe元素含量为1.67%~1.76%，最大偏差不超过0.1%；钛锭底面Fe元素含量为1.70%~1.81%，最大偏差为0.11%；钛锭侧表面上、中、下位置Fe元素含量为1.61%~1.80%；整根钛锭Fe元素含量偏差范围在0.2%以内，铸锭成分均匀性良好。
关键字: Ti-1023合金；TB6；铁偏析；大直径铸锭
（Luoyang Ship Materials Research Institute, Luoyang 471039, China）
Abstract:The reasons and improvements of Fe segregation in Ti-1023 titanium ingots were analyzed and summarized, then a d 400 mm Ti-1023 ingot was manufactured with VAR through controlling the specification of raw material, mixing way, melting time and melting parameter. Component analysis shows that, the content of element Fe in the upper end is 1.67%−1.76%, the deviation does not exceed 0.1%; that in the lower end is 1.70%−1.81%, the maximum deviation is 0.11%; that on the lateral surface is 1.61%−1.80%; the content deviation of the element Fe of the whole ingot is less than 0.2%, so the component homogenization is fine.
Key words: Ti-1023 alloy; TB6; iron segregation; big diameter titanium ingot
