来源：http://www.jnhjgs.cn 发布时间：2020-03-06 14:24:26 点击：
In the production process of aluminum alloy die casting, due to improper operation and material selection, various quality problems, including mesh burr, can be attributed?
The burr of aluminum alloy casting includes net mark, net mark and crack burr. The network burr of aluminum alloy die casting may be caused by the rapid flow of metal and the erosion of front wall. It may be that the surface roughness of the cavity RA is too large; the temperature difference of the mold is too large; it may be that the mold material is improper or the heat treatment process is wrong; it may be that the pouring temperature of the alloy liquid is too high and the mold preheating is not enough. It may be caused by the cracks on the mold cavity surface, the concentration of heat conduction near the inner gate area, the high friction resistance, the strong erosion of the hot melt metal, the drastic changes of heat and cold, the generation of heat, the formation of cracks and other reasons.
The reason of mesh burr in aluminum die casting has been found out, and the next step is to solve it. The staff should design the pouring system correctly, and try to use a smaller injection speed to meet the good molding requirements. Improve the surface quality of the cavity, reduce the Ra value; reduce the pouring temperature of the alloy liquid as much as possible; preheat the die sufficiently before die casting to make it reach the working temperature range. The die material selection is correct and the heat treatment process is reasonable; the inserts are annealed regularly to reduce the stress.
The above is the detailed introduction of Shandong Aluminum alloy die casting to the burr treatment of mesh on the surface of aluminum alloy die casting. For more information, please click http://www.jnhjgs.cn。