大规格TC4铸锭真空自耗电弧熔炼控制方式对比
Comparison of VAR Controlling Styles During Remelting Large-sized TC4 Ingots
谢英杰， 席锦会， 曲恒磊， 邓 超
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作者单位：西部钛业有限责任公司， 陕西 西安 710201
中文关键字：TC4铸锭； 熔炼控制方式； 表面质量； 成材率
英文关键字：TC4 alloy ingot; vacuum arc remelting (VAR) controlling styles; surface quality； pass percent
中文摘要：为了选择合适的真空自耗电弧熔炼控制方式，在生产规格为?准820 mm的TC4钛合金铸锭时，采用了电流控制和熔速控制两种不同的熔炼控制方式。对比分析了两种控制方式对熔炼参数的变化、铸锭化学成分、表面质量以及成材率的影响。结果表明：两种控制方式下铸锭化学成分分布均匀性相当，但熔速控制方式下正常熔炼阶段实际熔速的波动小，且铸锭的表面质量良好和成材率高。在实际生产中熔速可选用电流控制下电流B(21～28 kA)所对应的熔速。
英文摘要：In order to select appropriate VAR controlling styles, the two controlling styles, current controlling and melting rate controlling, were adopted to produce TC4 alloy ingots with ?准820 mm. The change of melting parameters, chemical composition, surface quality and pass percent of TC4 ingots in different VAR controlling styles were compared. The results show that the uniformity of composition distribution is almost the same in different controlling styles, but the surface quality under the control of melting rate is better, the actual melting rate is more stable and the pass percent of TC4 ingots is higher than that under the control of current. The melting rate under current B(≥23 kA) is recommended in actual production.