National key research and development project "low cost, high corrosion resistant titanium and titanium alloy pipe and high quality titanium strip manufacturing technology development and application" has achieved the stage results
In July 27th, the national key research project led by Yunnan titanium industry Limited by Share Ltd with low cost and high corrosion resistance of titanium and titanium alloy tubes with high quality titanium belt manufacturing development and application technology of the annual work will be held in Panzhihua city in Sichuan province. This is the key project of national science and technology research and development system reform for the first time to organize the implementation of the high technology center of Ministry of science and technology attaches great importance to the implementation of the project, organize experts to conduct periodic summary and review of the project, to prepare for the end of the project summary. To this end, the Yunnan titanium industry and 9 units participating in the project R & D were reported on the progress of the project.
The project is a national key research project of the first batch of one of the 36, at the same time, China is the "13th Five-Year" first entered the key research project.
Main points of project implementation
With the implementation of the major offshore oil drilling platforms, desalination, nuclear power, ships and other major projects, the demand for various types of corrosion-resistant metal pipes and their connections has shown a substantial growth trend. In marine engineering, titanium and its alloys are the ideal choice for marine engineering materials because of their high strength, low density and excellent corrosion resistance. But because our country is in high quality wide large titanium with high corrosion resistance, high strength titanium alloy seamless pipe, large diameter and high performance roll welded titanium pipe and matched with manufacturing technology and there is a big gap between the bottleneck, in urgent need of its manufacturing technology especially low cost manufacturing has made a major breakthrough, break the blockade of foreign, to promote the rapid application. Meet the needs of the national strategy.
Based on the above background, the project takes the national major projects and strategic emerging industries as the traction, and organize the implementation of the basic forefront, major common key technologies, to the application demonstration, to carry out the whole chain of innovative design.
Through the above research, solve pipe processing and complex marine environment in the application process of microstructure and performance of residual stress - corrosion resistance of cooperative control of key scientific problems, constructing complex marine environment evaluation system of the corrosion resistance of titanium and titanium alloy tubes under the condition of high quality service: break long (3.5m~8m) titanium alloy ingot cold cathode EB/EB+VAR furnace duplex melting and casting, large titanium alloy seamless tube rolling and high precision special thread connection manufacturing, high-quality long (greater than or equal to 8m) titanium ingot casting and direct rolling of EB furnace with large, wide strip hot / cold rolled titanium plate shape control, and the whole process of hot rolled titanium strip coil continuous annealing pickling, titanium with argon strong convection bell annealing performance and surface enhancement, high performance welding of titanium tube laser with double electrode double torch welding and the residual titanium material recycling key EB furnace Technique.
The project in the aspects of technical route design, with low cost of manufacturing tube / strip as a breakthrough, through a substantial increase in yield, saving titanium metal resources, reduce energy consumption and reduce the pollution of the environment, the formation of high corrosion resistance of titanium and titanium alloy tubes with high quality titanium with low cost manufacturing technology.
Through the implementation of this project will be developed into offshore oil drilling with high corrosion resistance of titanium alloy seamless pipe, marine engineering and desalination equipment with high performance welding of titanium tube and supporting large titanium with low cost manufacturing technology industrialization and industrialization application. A series of high corrosion resistance of large titanium alloy seamless pipe, welded pipe, to obtain high performance wide large titanium products, the formation of titanium alloy seamless pipe welded titanium pipe 2000 tons / year, industrial production capacity of 4000 tons / year and 8000 tons of large titanium strip, meet the National Offshore Oil drilling platform, seawater desalination, nuclear power and other major the demand of project.
To this end, the project is divided into five topics: one is to study the optimization design of high corrosion resistance of titanium alloy with high strength and low cost and comprehensive evaluation, two is a high quality super corrosion resistance of titanium and titanium alloy ingot preparation key technology research and application, three offshore oil drilling with high corrosion resistance of titanium alloy specifications seamless pipe manufacturing technology industrialization development and industrialization, is the four large - low cost with high quality titanium industrial manufacturing technology research and industrialization, five marine engineering and desalination equipment with high performance welding of titanium tube technology development and industrialization of industrial manufacturing.