Equipment iteration drives material upgrading, and the industry is in a period of rapid development(2)

Titanium and titanium alloy with its excellent characteristics, is considered to be a very ideal Marine materials, Russia in the practical application of Marine titanium alloy is the most advanced, the amount of titanium used in ships has been close to 18%, China's ship titanium consumption with 1%, the future development space is huge. Titanium alloy material has low density, high strength, corrosion resistance, high temperature resistance, sound permeability, no magnetic, no cold brittleness, can fully meet the requirements of Marine materials, mainly used in pressure shells, hull structures, pipes, valves and accessories. Russia's research and development and application level is the first, and Marine titanium alloys of different strength levels have been formed. Its "Alpha" class, "Mike" class, "Sierra" class nuclear submarine shell are made of titanium alloy, "Alpha" class nuclear submarine titanium alloy consumption reached 3000 tons; The United States applies titanium alloy to various power submarines, seawater piping systems and pressure shells of deep-sea submersives, such as Aivin, Sea-Cliff, and so on. China began to research and develop titanium alloys for ships as early as 1962, and the complete system formed can meet the basic needs of titanium alloys for ships in China, but there is a certain gap between China's research and application and Russia and the United States, and the application parts and dosages are less. According to the "Titanium and titanium alloys in Ships" and other documents, The amount of titanium used in foreign ships is about 13%, Russia is close to 18%, and China's proportion is less than 1%. The main reasons may be 1) the cost of titanium is higher than that of structural steel; 2) China's titanium industry used to serve the aviation industry, and the application research and related supporting capabilities of titanium for ships are insufficient. The excellent characteristics of titanium alloy itself determine its application trend in the field of ships and ocean engineering. In the future, with the improvement of the development and research level of Marine titanium materials and the gradual maturity of supporting equipment, the amount of titanium used in ships has a broad space for improvement.