How to reduce the manufacturing cost of industrial purity and titanium alloy

Due to the advantages of low density, high specific strength, high flexion ratio, good plastic toughness and corrosion resistance, titanium and titanium alloy have a broad application prospect in military and civil fields, and their performance and manufacturing technology level directly affect the development and improvement of these fields. The bottleneck of expanding the titanium alloy market is the difficult extraction, smelting and machining of titanium, which leads to the high production cost. The production cost of titanium ingot is about 30 times of that of steel ingot of the same weight and 6 times of that of aluminum ingot, among which the cost of producing titanium sponge from ore to magnesium reduction is about 20 times of that of producing iron ingot of the same weight. Currently, the cost per ton of industrial pure titanium is about $7.5 ~ $10 / kg, while the production cost of aerospace titanium alloys is as high as $40 / kg_.

So the cost reduction is mainly to reduce the production cost of industrial pure titanium and the manufacturing and processing cost of titanium and titanium alloy. In order to reduce the cost of titanium alloy, the near-net process of titanium alloy with no cutting and less cutting has been developed vigorously abroad. There are three main methods to make titanium alloy parts at present: (1) traditional forging material processing;(2) casting; Powder metallurgy. Forging for material processing, the material performance is good, but waste, processing, high cost, and difficult to obtain complex shape of the product; The casting can obtain the net shape or near net shape product with complex shape, low cost, but the defects such as component segregation, porosity and shrinkage L in the casting process are hard to avoid, and the material performance is low. The powder metallurgy of titanium alloy overcomes the disadvantages of these two methods and has their advantages. Therefore, researchers at home and abroad have done a lot of work on the preparation of titanium alloy by powder metallurgy technology.