Abstract: The activity of titanium increases rapidly by the elevation of temperature, and it tends to react with various material intensively at high temperature. Currently, the predominate melting technique of high quality titanium alloys is the 3 times vacuum consumable melting protected by vacuum or inert gas. The temperature of titanium alloy liquid is above 1750 ℃, thus the use of cooling water is necessary to protect the important devices such as copper crucible, electrode rod and furnace body. Under improper handling or equipment fault conditions, the cooling water may flow into the crucible and react with the hot titanium alloy liquid. In practical mass production, severe explosion may occur, which will lead to casualty and property losses. The current work is based on mass production and equipment management experience. Potential risks of the design of vacuum consumable melting device is identified, and precautions are systematically analyzed in this paper.

Key words: titanium alloy, VAR, classification of casualty accidents of enterprise employees, preventive measures