密臀av,大胆亚洲成人社区,美国成人超碰在线播放,日韩操熟妇

In recent years, China's metal processing technology for the continuous respected, led the high-temperature high-performance high-niobium titanium alloy technology and industrialization process, powder metallurgy technology can minimize the alloy composition segregation, eliminate coarse, uneven Casting organization. In the development of technology in China to develop an independent intellectual property owned in the engine material high temperature and high performance high niobium titanium aluminum alloy material, is about to enter the industrialization stage, in the development of titanium alloy has a milestone, marking China's titanium aluminum Compound research in the field of international leadership.

China has the titanium aluminum alloy research included in the national 863 high-tech new material development plan. After many years of efforts, in the alloy of microstructure, deformation characteristics, the impact of adding elements and alloy preparation technology and other aspects of the fruitful work, has a number of titanium aluminum alloy research papers published in domestic and foreign journals and academic conference The

From the electronics industry to the motor manufacturing; from the civilian industry to the military industry; from the general technology to cutting-edge high-tech, can see the powder metallurgy process. Powder metallurgy method can be prepared uniform tissue, small parts, and can achieve the workpiece near net shape, which can effectively solve the Ti-Al intermetallic compound alloy difficult to process forming problems. At present, there are two main milling methods: elemental powder method and titanium aluminum pre-alloy powder method. At present, domestic scholars use elemental powder method to prepare titanium aluminum alloy.