What is the induction melting technology of titanium alloy forgings and titanium alloy flanges

Vacuum consumable electrode arc melting is widely used in Chinese industry. Although it can effectively ensure that the alloy liquid has a certain superheat and relatively accurate alloy melt composition, this method requires very high quality of the raw electrode, and the molten pool has a large surface area and a small depth, resulting in large volatilization loss of high vapor pressure elements (such as A1 element), which is not conducive to the control of alloy composition.

The water-cooled copper crucible induction melting method is to melt the copper crucible with split valves and water cooling under the induction electromagnetic field, which can maximize the advantages of the induction melting method. There is a solid shell between the water-cooled copper crucible and the metal melt, which is generated by the solidification of the titanium melt. At this time, the lining of the crucible is equivalent to the molten metal, that is, the composition of the inner surface of the crucible is the same as that of the metal melt, to avoid the pollution of the crucible to the metal melt. With the increase of the number of cold crucible blocks and the input power of the power supply, the strong magnetic field can promote the rapid melting of the furnace charge and produce a strong stirring effect, so that the temperature and composition of the metal melt is uniform, and the uniform superheat can be obtained. Due to the complex composition of the new titanium alloy and TiAl compound alloy, the allowable deviation of alloying element content is small, so it is difficult to meet the requirement of alloy composition by arc melting. The water-cooled crucible is especially suitable for this work. The alloy composition is uniform, the interstitial element content of the alloy liquid is suitable for superheat, which can meet the requirements of static and centrifugal pouring.