High Mo content Ti Mo alloy vacuum consumable electrode preparation method, the method includes: a, low Mo content Ti Mo intermediate alloy debris, sponge titanium particles and Mo particles respectively drying; Two, the low Mo content Ti Mo intermediate alloy debris and 1/4 mass of titanium sponge particles mixed to form a mixture; 3. Cloth the mixture with the remaining sponge titanium particles and Mo particles to obtain a self-consumption cloth block; Four, pressing the consumable electrode block; Five, welding high Mo content Ti Mo alloy vacuum consumable electrode rod. The invention adopts low Mo content Ti Mo intermediate alloy debris and Mo particles as molybdenum raw materials, combined with the control distribution mode, the low Mo content Ti Mo intermediate alloy debris is wrapped by sponge titanium particles, avoiding the phenomenon of slag dropping and edge arc in smelting, and the alloy composition of high Mo content Ti Mo alloy cast ingot is uniform. There is no Mo segregation and high density inclusion.
Titanium alloy has a series of advantages such as high specific strength, good corrosion resistance and good biological compatibility, and is widely used in aviation, aerospace, weapons and medical fields. At present, vacuum consumable melting is one of the most important melting methods of titanium alloy. Mo element is an important isomorphic β stable element of titanium alloy. In general, the addition of Mo element in titanium alloy is added by Al-Mo and other intermediate alloys. Al-Mo intermediate alloys can greatly reduce the melting point of Mo alloy and reduce the risk of Mo element segregation and high density inclusion. For Ti-Mo binary alloy with high Mo content, there is no other alloying element, and Mo element is mainly added to the alloy in the form of pure Mo. At present, the vacuum consumable electrode of titanium alloy is mainly pressed in the form of alloy pack or mixed fabric, and Ti-Mo binary alloy can only be pressed in the form of mixed fabric, and pure Mo is a refractory metal, and the melting point of titanium sponge is relatively different, there will be slag and edge arc phenomenon in the melting process, and even explosion. Therefore, the addition form of Mo element in the vacuum consumable electrode of titanium alloy and the mixing pattern have an important effect on the melting and uniformity of ingot, so it is necessary to improve it.
A high Mo content Ti-Mo alloy vacuum consumable electrode pressing method. In this method, Ti-Mo intermediate alloy debris with low Mo content and Mo particles are used as the source of Mo element. Combined with the control distribution method, the debris of Ti-Mo intermediate alloy with low Mo content is completely evenly coated by titanium sponge particles. The phenomenon of slagging and edge arc in the subsequent melting process is avoided due to the large difference in the melting point of the intermediate alloy debris and sponge titanium between Mo and Ti-Mo. The resulting Ti-Mo alloy cast ingot with high Mo content has uniform composition, small fluctuation, and no Mo element segregation and high density inclusion.
