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China liquid metal status quo in 2018 and trend analysis report
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Name: 2018 China's liquid metal research and development trend trend analysis report
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Liquid metal or amorphous material, refers to the structure of the material, which is different from the concept of nanocrystalline, crystalline, quasicrystal, the general materials are in the form of crystals, under certain conditions with high strength, high hardness, plasticity , Heat conduction and wear resistance and so on. Liquid metal, also known as metallic glass, has been attracting the attention of scientists from all over the world due to its special atomic arrangement different from that of the crystal, showing the specific properties of ultra-high specific strength, large elastic deformation capacity and low thermal expansion coefficient, becoming the most active material research One of the fields, pregnant with the third industrial revolution after steel and plastic.
China Industry Research Network released in 2018 China's liquid metal research and trend of development trend analysis report that the liquid metal is a high-tech materials, with excellent physical, chemical and mechanical properties, is the power, electronics, computers, telecommunications and other high-tech The key materials in the field of technology, market demand, industrialization prospects are very broad, and its development and application can lead to a number of related areas of technological progress and synergic development. In electronic technology, liquid metal with its high efficiency, low loss, high permeability and other excellent physical properties effectively promote the electronic components to high-frequency, high efficiency, energy saving, miniaturization direction, and can partially replace the traditional silicon steel, Permalloy and ferrite and other materials. It can be predicted that in the future of electronic technology liquid metal will occupy a very important position. Thus, liquid metal is also known as the cross-century new functional materials.
The global shipments of PC, tablet and handset devices totaled 2.22 billion units and it is estimated that there will be 2.5 billion units in ** year. Liquid metal market is expected to reach more than 1 billion US dollars. Assuming that 20% of liquid metal is used in PCs, tablets and mobile devices, the average cost is $ 2, or $ 1 billion in annual sales. According to the continuous development of liquid metal, once the liquid metal is used in the shell or part of the apple, the industry will have a market of tens of billions of dollars like aluminum alloy forging and CNC.
Internationally, the United States, Germany, Japan and other countries have invested heavily in the development of the liquid metal industry. My country has also invested a large amount of funds in four consecutive annual plans to organize key scientific and technological problems. As the main undertaking unit, through its efforts in recent years, the Iron and Steel Research Institute has made more than 200 scientific research achievements of international advanced level in basic research, material research, process equipment, application development and industrialization. Coupled with the successful holding of Aetna Technology Co., Ltd., which was held by Iron and Steel Research Institute last year, it has created a good environment for the industrialization of liquid metal materials.
2018 China's liquid metal status quo and trend analysis of the development trend report China's liquid metal industry status quo, development and changes in the pattern of competition conducted in-depth investigation and analysis of the liquid metal market in the future made a detailed description of the development trend, but also based on the liquid metal The trajectory of the industry made a cautious judgment on the future development prospects of the liquid metal industry, looking for new investment highlights for liquid metal industry investors.
2018 China liquid metal status quo and trend of development trend analysis report Finally, the investment liquid metal industry space, specify the direction of investment, put forward the researchers' strategic proposals for reference for investment decision-makers.
China Industry Research Network released "2018 China's liquid metal status quo and trend analysis of development trend analysis report" is related to liquid metal companies, research institutes, government accurate, comprehensive and rapid understanding of liquid metal industry trends, the development of strategy is indispensable Professional report.
The first part of the development of the industry
Chapter One Overview of Liquid Metal Materials
Section liquid metal overview
First, the definition and characteristics of liquid metal
The liquid metal exhibits the following hydraulics when flowing in the sand:
1. Viscous fluid flow: liquid metal is a viscous fluid. The viscosity of the liquid metal is related to its composition and increases with the temperature of the liquid metal in the flowing process. When crystals appear in the liquid metal, the viscosity of the liquid increases sharply, and the flow rate and flow regime also change rapidly.
2. Unstable flow: During the filling process, the temperature of the liquid metal continuously decreases while the temperature of the mold rises continuously, and the heat exchange between the two is unstable. As the temperature of the liquid drops, the viscosity increases and the flow resistance increases. In addition, the pressure head of the liquid flow increases or decreases during the filling process, and the flow rate and flow regime of the liquid metal also change continuously, resulting in the liquid metal filling the mold Unstable flow in the process.
3. Porous tube flow: Since the sand has a certain porosity, the gating system and cavity in the sand can be considered as porous tubes and containers. When the liquid metal flows in the "porous tube", the liquid metal often does not adhere well to the tube wall. In this case, the external gas may be entrained in the liquid stream to form pores or cause oxidation of the molten metal to form oxidized slag.
4. Turbulent flow: Production practice tests and calculations show that the liquid metal in the pouring system, the Reynolds number Re greater than the critical Reynolds number Re Pro, belong to the turbulent flow. For example, ZL104 alloy pouring at 670 ?, the flow of 20mm diameter sprue when the flow rate of 50cm / s, the Reynolds number of 25000, much greater than the critical 2300 Reynolds number. For some horizontal casting thin-walled castings or thick castings filling, the liquid flow increases slowly, it is also possible to get laminar flow. The research on the casting system of high-quality light alloy castings shows that when Re <20000, the oxide film on the flow surface will not be broken. If the Reynolds number is controlled from 4000 to 10000, it can meet the requirements of producing high quality castings of aluminum alloy and magnesium alloy. Some people through the hydraulic simulation and cast aluminum casting test shows that: the maximum allowable Reynolds number should not exceed 10,000 in the sprue, runner does not exceed 7000, less than 1100 within the runner, the cavity does not exceed 280. In summary, the main factors that affect the smoothness of the liquid metal flow are the flow velocity of molten metal and the shape and cross section of the casting system