Some knowledge points of magnesium alloy, magnesium alloy profile manufacturers tell you

Magnesium alloy profile manufacturers believe that in recent years, the demand for lightweight materials is increasing. As a structural material, magnesium alloy is widely used due to its small specific gravity, high specific strength and specific stiffness, good thermal and electrical conductivity, good machinability, excellent damping and electromagnetic shielding performance, easy processing and recycling. In the automotive, electronics, communications, and other industries. Therefore, it is called "green engineering material in the 21st century".

Magnesium alloy profile manufacturers believe that according to different forming processes, magnesium alloy materials are mainly divided into cast magnesium alloys and wrought magnesium alloys. The former mainly obtain magnesium alloy products through casting. Including sand casting, investment casting, lost foam casting, die casting, etc. Among them, die-casting technology is mature and widely used. The latter is the production of plates, rods, tubes, profiles and forgings of various sizes by deformation. Moreover, through the control of material structure and the application of heat treatment process, higher strength, better ductility and better mechanical properties can be obtained, so as to meet the needs of more structural components. In addition, magnesium alloy semi-solid forming, as a new casting technology, has been extensively researched and applied.

Magnesium alloy profile manufacturers believe that magnesium alloy has excellent die-casting process performance: magnesium alloy liquid has low viscosity, good fluidity, and is easy to fill complex cavities. Magnesium alloys can easily produce die castings with a wall thickness of 1.0 mm to 2.0 mm, and now the wall thickness can reach 0.6 mm. The casting inclination angle of magnesium die castings is 1.5 degrees, while that of aluminum alloys is 2 to 3 degrees. The dimensional accuracy of magnesium die castings is 50% higher than that of aluminum die castings. The melting point and latent heat of crystallization of magnesium alloy are lower than that of aluminum alloy. The mold erosion during die casting is smaller than that of aluminum alloy, and it is not easy to stick to the mold. The life of the mold is 2-4 times that of aluminum alloy. The die-casting cycle of magnesium alloy parts is shorter than that of aluminum parts, so the production efficiency can be increased by 25% compared with aluminum alloy parts. The machinability of magnesium alloy castings is better than that of aluminum alloy castings. The cutting speed of magnesium alloy castings is 50% higher than that of aluminum alloy castings, and the processing energy consumption is 50% lower than that of aluminum alloy castings. Production experience shows that due to high production efficiency, the total cost of magnesium alloy parts in hot chamber die casting is lower than that of aluminum alloy parts in cold chamber die casting.

Magnesium alloy profile manufacturers believe that cold chamber and hot chamber die casting methods are widely used in magnesium alloy die casting. Generally, hot chamber die-casting machines are used for thin-walled castings, and cold-chamber die-casting machines are used for thick-walled castings. Magnesium alloy hot chamber die-casting machine is a special equipment for magnesium alloy die-casting widely used abroad. It has the characteristics of high production efficiency, low pouring temperature, long casting life and easy realization of melt protection. The main disadvantage is high equipment cost and maintenance cost. During magnesium alloy die-casting, the high-speed turbulent movement of the alloy liquid during the stamping process prevents the gas in the cavity from being discharged, which will lead to loose tissue and even bulging or deformation of the casting surface. Die casting process parameters, such as pressure, speed, melt temperature, mold temperature, etc. Has a significant effect on casting properties.