Hot Topping of the Large-size Finished Titanium Alloy Ingot by VAR

Li Yingying

doi:10.15980/j.tzzz.2020.03.020

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Hot Topping of the Large-size Finished Titanium Alloy Ingot by VAR
Vol. 40, Issue 3, Pages: 324-326(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.03.020

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[1]李莹莹.大规格钛合金真空自耗铸锭热封顶技术探讨[J].特种铸造及有色合金,2020,40(03):324-326.

Li Yingying. Hot Topping of the Large-size Finished Titanium Alloy Ingot by VAR. [J]. Special Casting & Nonferrous Alloys 40(3):324-326(2020)
[1]李莹莹.大规格钛合金真空自耗铸锭热封顶技术探讨[J].特种铸造及有色合金,2020,40(03):324-326. DOI： 10.15980/j.tzzz.2020.03.020.

Li Yingying. Hot Topping of the Large-size Finished Titanium Alloy Ingot by VAR. [J]. Special Casting & Nonferrous Alloys 40(3):324-326(2020) DOI： 10.15980/j.tzzz.2020.03.020.

摘要

针对真空自耗熔炼大规格（?≥760mm）钛合金铸锭易出现头部缩孔较深、切头量大的问题

分析了缩孔产生的原因

论述了热封顶工艺制定的原则和方法

并据此制定了适合实际生产的热封顶工艺制度。试生产发现

该工艺可显著减小缩孔深度

提高铸锭的成品率。

Abstract

During Vacuum Arc Remelting process

deeper shrinkage cavity usually appears on the top of the largesize finished titanium alloy ingot

which also causes the high discarding amount of the ends.The reasons causing shrinkage cavity were analyzed

and the principle and method to design the parameters of hot topping were described.Thus

the hot topping system suitable for the production was determined which reduced the depth of the shrinkage cavity and increased the yield rate of the finished ingot greatly.

关键词

钛合金真空自耗冶炼热封顶缩孔深度

Keywords

Titanimu AlloyVacuum Arc RemeltingHot ToppingDepth of Shrinkage Cavity

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