Research of Removing Inclusions in Titanium Ingot Melted by Plasma Arc Cold Hearth
Author of the article:LI Yingying
Author's Workplace：Vacuum Arc Remelting Factory,Baowu Special Metallurgical Co.,Ltd.,Shanghai 200940,China
Key Words：PACHM titanium alloy high density inclusion low density inclusion
Abstract：The effect of removing high and low density inclusions by plasma arc cold hearth was studied by adding inclusions of different density into the raw materials before melting. The results show that the removal effect of high density inclusions is closely related to the distance, time and eddy current of melt flow. In terms of the removal effect of low-density inclusions such as Ti N, longer exposure time and longer flow distance of molten pool are very favorable for the removal of low-density inclusions. The process of melting, refining and casting can be controlled by plasma arc cold hearth.It is excellent at removing inclusions.
