Magnesium industry in China started late, but it developed very fast. Since 1990s, China's magnesium industry has entered a period of rapid development. Our country is a big country of magnesium resources, is the global production of magnesium and the export country, but it is far from the magnesium industry. In magnesium smelting and processing industry, to build and improve the economic and environmental protection type magnesium processing chain, should pay attention to the promotion of energy-saving environmental protection of new technologies, energy-saving design process combination, looking for alternative materials for energy saving and environmental protection type; development and the economic advantage of the new smelting and processing technology; promote industry, academia, research, and the interconnection of the dominant group, promote the combination of enterprises, enhance overall efficiency of energy use, get rid of mass production, mass consumption and a large number of abandoned economic activity. Enhance the quality, technology, cost of magnesium industry in China's competitiveness, create economic and environment-friendly magnesium processing chain.
As people become increasingly concerned about energy and the environment, the application of magnesium and magnesium alloys are hitherto unknown attention. Magnesium is rare in China metal resources, one of few advantages, in the past 15 years, China's magnesium industry gradually strong. Now it has become the world production of primary magnesium absolute power, magnesium production in 2003 is accounted for more than 60% of the total world output. From the beginning of 2000, under the direct promotion Shi Changxu academician, the research and application of magnesium alloys in China have also made remarkable achievements, gradually moving from the country to the development and production of magnesium magnesium application power. In the past 5 years, the research on high performance magnesium materials in China, great progress was made in the development and application of magnesium and magnesium alloy processing equipment the development of deep processing of products in terms of. From the perspective of the magnesium industry, has formed a complete industrial chain of raw materials to processing has been applied to, from the perspective of the research and development of magnesium, has initially formed from basic research to applied research to product development of the complete system of scientific research and development.
Magnesium industry in China started late, but it developed very fast. Since 1990s, China's magnesium industry has entered a period of rapid development. Our country is a big country of magnesium resources, is the global production of magnesium and the export country, but it is far from the magnesium industry. In magnesium smelting and processing industry, to build and improve the economic and environmental protection type magnesium processing chain, should pay attention to the promotion of energy-saving environmental protection of new technologies, energy-saving design process combination, looking for alternative materials for energy saving and environmental protection type; development and the economic advantage of the new smelting and processing technology; promote industry, academia, research, and the interconnection of the dominant group, promote the combination of enterprises, enhance overall efficiency of energy use, get rid of mass production, mass consumption and a large number of abandoned economic activity. Enhance the quality, technology, cost of magnesium industry in China's competitiveness, create economic and environment-friendly magnesium processing chain.
As people become increasingly concerned about energy and the environment, the application of magnesium and magnesium alloys are hitherto unknown attention. Magnesium is rare in China metal resources, one of few advantages, in the past 15 years, China's magnesium industry gradually strong. Now it has become the world production of primary magnesium absolute power, magnesium production in 2003 is accounted for more than 60% of the total world output. From the beginning of 2000, under the direct promotion Shi Changxu academician, the research and application of magnesium alloys in China have also made remarkable achievements, gradually moving from the country to the development and production of magnesium magnesium application power. In the past 5 years, the research on high performance magnesium materials in China, great progress was made in the development and application of magnesium and magnesium alloy processing equipment the development of deep processing of products in terms of. From the perspective of the magnesium industry, has formed a complete industrial chain of raw materials to processing has been applied to, from the perspective of the research and development of magnesium, has initially formed from basic research to applied research to product development of the complete system of scientific research and development.
2. Research status of magnesium alloys in China
Including countries related research and application program, organized by the Ministry of science and technology in the implementation of the "Tenth Five-Year Plan major special magnesium alloy application development and industrialization", "15" Plan 863 project, key plans for international cooperation, science and technology innovation fund for small and medium enterprises, the National Natural Science Fund Committee project of National Natural Science Foundation of, the Commission of science, technology and industry for national defense military support project, technical improvement project of the economic and Trade Commission, national development and Reform Commission high technology demonstration project.
The goal of "Tenth Five Year" tackling key problems in science and technology major special magnesium alloy application development and industrialization ", build magnesium alloy technology innovation system; to speed up the application and development of magnesium resources in China; cultivate related high-tech industrial cluster; magnesium resource advantage of our country change into economic advantage. Technology goal is to promote the application and industrialization of magnesium material; development of bischofite dehydration technology, magnesium salt lake resources development; improve the level of Pidgeon's magnesium reduction, reduce pollution; magnesium production of key technology and equipment production capacity; promoting the application of magnesium in the automotive, motorcycle, and 3C industry; research the long-term development strategy of China's magnesium. Speech on the 2004 National Conference on science and Technology Ministry of science and Technology Minister Xu Guanhua pointed out that "by magnesium alloy key technology research and industrialization of key, the initial formation of the manufactured from high-quality magnesium material production to magnesium alloy products complete industrial chain, the magnesium resource country to a magnesium resources power across laid the foundation for the our country to achieve. "The high technology development plan (863 plan): high performance magnesium alloy materials and application of technology development, the goal is development in the next 5 to 10 years obtained by application of key technologies in units, including universities, research the and enterprise, project 7, including heat-resistant die-casting magnesium alloy and its application technology, high strength high toughness magnesium alloy and its application technology development, high performance deformation magnesium alloy and its application technology, magnesium alloy advanced welding technology, magnesium alloy punch forging molding technology, magnesium alloy forged wheels technology and so on. These researchers have made a great breakthrough, including developed three in 175 DEG C has good resistance to creep properties of magnesium alloy, low cost of the rare earth magnesium intermediate alloy of preparation technology, heat resistant magnesium alloy die casting technology; develop automobile hub for high strength and high toughness casting magnesium alloy, magnesium alloy alloy wheel low pressure casting production technology; develop new magnesium alloy deformation performance is better than the existing mg Al Zn alloy, plates, and a hollow thin-wall profile processing technology, magnesium alloy corrosion protection technology; development of the magnesium alloy welding process, welding equipment and welding materials.
3, magnesium research and application development trend
Magnesium alloy used for power system components: conditions of use 1:100 to 200 DEG C, automatic transmission box, oil bottom shell, die-casting molding; use condition 2: 200 to 300 DEG C, cylinder block and cylinder head, sand casting and die-casting molding. R & D institutions: General Motors, Volkswagen, Mazda, Nissan, Mitsubishi, no - Randa magnesium industry; the American big three auto companies combined to the development of new heat resistant magnesium alloy for economic and technical assessment. The experimental production and application of the newly developed heat resistant magnesium alloy in the industrial production and application of the Volkswagen Automobile company. The development of new heat resistant magnesium alloys with low cost magnesium and rare earth intermediate alloy was developed.
Wrought magnesium alloy and its processing technology is becoming a hot spot in the research and application of magnesium alloys. Hot spot research includes magnesium alloy equal channel angular extrusion technology. Superplasticity of magnesium alloys, is an important research direction, high strain rate superplastic study should be at the strain rates of 10 - 2S - 1 above the high strain rate superplastic forming (HSR (SPF), to save energy, improve productivity, expand the application have very important significance; large grain industrial state of superplastic magnesium alloys, grain larger industrial state magnesium alloy under certain conditions of superplastic, because it doesn't require the pre processing can save energy, so there will be greater application prospects; low temperature superplasticity of magnesium alloy and study of magnesium alloy under lower temperature (0.5Tm or below the lower) for superplastic deformation. Magnesium alloy precision die forging, 1999, Japan's Sony, Hitachi Metals and Tokyo in precision forging process of the three companies joint development success of magnesium alloy precision forging forming technology (press - the). The precision forging technology is a new technology which combines the forming and forging process. Compared with die casting and semi solid forming process, the precision forging process has the advantages of high production efficiency and high yield. Magnesium alloy forging molding commonly used AZ31B wrought magnesium alloy, its production equipment using the common mechanical forging machine can. Magnesium sheet cast rolling technology (short flow). Magnesium sheet stamping process. Damping magnesium alloy: the damping performance of magnesium is better than all the metal structure materials, has broad application prospects in the aerospace and military fields, such as missiles, satellites and weapons, electronic instruments, such as stents, etc.. Foam magnesium alloy: Nagoya Industrial Research Institute of Japan in May 1999 developed a successful foam magnesium alloy, with excellent shock absorption and high temperature performance, can be used for automotive anti collision rod and muffler.
The research and the application prospect of magnesium alloy materials is very broad, relative to other metal materials (such as aluminum, steel, etc.) the level of research and development, smaller gap between China and developed countries in the world, can say almost in the same starting line, if the concentration of the strengths, researches on key scientific issues, may achieve a major breakthrough, to achieve even surpass the world's advanced level. Our country in magnesium alloy technology development and application in made great progress, as the world first "magnesium" country to build magnesium, make good use of magnesium, benefit for China and the rest of the world, and in the research field of magnesium become the world leader, promoting the magnesium alloy walk the road of sustainable development, while also carrying out significant fundamental research of magnesium alloy.