This paper studies the influence of casting ingot which is added the riser and bottom of the ingot(in weight percentage over 20% ) on composition of casting ingot during the vacuum consumable arc melt process ,uses chemical analysis method to determine the compositions of 3 different positions and a riser section of residual material recycling ingot ,and compares the recycling material composition ,electrode block composition ,ingredients and measured casting ingot component .The results show that three surface tests prove the main elements and impurity elements distribution are uniform ,can meet the requirements of the American AST-MB348 and AMS 4928R standards .Because Al residual element of titanium compound is difficult to compute and a large amount of Al volatile in smelting process ,to make the accurate control of Al elements difficult ,but V ,O and Fe element can be precisely con-trolled in the ingot .%研究了真空自耗熔炼过程中加入锭底、冒口等钛残料 (加入质量分数大于20% ) 后对铸锭成分的影响 ,用化学分析的方法测定了残料回收铸锭表面上、中、下3点以及冒口截面5点成分 ,并对回收料成分、电极块配料成分、目标配料成分和铸锭实测成分进行了对比.结果表明 :对钛残料回收铸锭进行表面上、中、下3点成分检测 ,其主元素及杂质元素成分分布较均匀 ,满足ASTMB348和AMS 4928R标准要求 ;对钛残料回收铸锭进行冒口截面5点成分检测 ,其心部Al含量略高于其余部位 ,这是由于铸锭心部处于熔池底部 ,在真空条件下 ,长时间熔炼造成大量的Al从熔池底部挥发所致;由于钛残料中Al元素计算困难 ,且熔炼过程中Al挥发量较大 ,造成对回收铸锭Al元素不能精确控制 ,但是铸锭中V、O、Fe元素可以精确控制.
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