The solution of some problems in zinc alloy die casting-Shuangcheng Hardware |Die Cast Product|Die Casting Mould

The solution of some problems in zinc alloy die casting

Date：

2021-06-23

Zinc alloy die casting is widely used in various decorations. Some common defects of zinc alloy die casting are surface bubbling. Defect characteristics: there are prominent small bubbles on the surface of the die casting. These bubbles are found after die casting, after polishing or finishing or after spraying or electroplating.

The solution of some problems in zinc alloy die casting

Zinc alloy die-castingpieces are currently widely used in various decorations. Some common defects of zinc alloy die-casting are surface blistering. Defect characteristics: there are prominent small bubbles on the surface of the die-casting piece. These bubbles are found after die casting, after polishing or processing, or after spraying or electroplating

Cause:

1. Zinc alloy die casting is caused by intergranular corrosion:

Harmful impurities in zinc alloy composition: lead, cadmium and tin will accumulate at the grain boundary, It causes intergranular corrosion, and the metal matrix is cracked due to intergranular corrosion. Electroplating accelerates this disaster. Parts affected by intergranular corrosion will expand and improve the coating, and bubbles will be generated on the surface of the casting. Especially in a humid environment, intergranular corrosion will cause deformation, cracking and even damage to the casting

2. The zinc alloy die-casting hole causes:

is mainly caused by the pore and shrinkage mechanism. The pore is usually round, and most of the shrinkage is irregular. (1) Causes of pores: a In the process of filling and solidification of liquid metal, due to the invasion of gas, air holes will be formed on the surface or inside of the casting, and the gas evaporated from the coating will invade. The gas content in c alloy liquid is too high, which will precipitate during solidification

With the rapid development of the die casting industry, the die casting process has become a widely used and rapidly developing metal thermoforming process, especially the zinc alloy die casting and aluminum alloy die casting, especially the popular zinc alloy die casting, which is very important for people. What are the benefits of the zinc alloy die casting process? Here is a brief introduction

Zinc alloy die-casting is a method that requires the use of high pressure to push molten metal into the mold cavity. Zinc and other non-ferrous metals, including copper, lead, magnesium, tin and other materials, are usually used to manufacture and die-casting zinc alloy die-casting parts. This process is suitable for the production requirements of small and medium-sized parts produced in large quantities. This process is very convenient, so it has become a widely used casting method in the zinc metal processing industry

In the production process of zinc alloy die-casting parts, different shapes from simple to complex need to be designed. Compared with other processes, casting is more suitable. In order to produce mixed parts that can measure the width of zinc, this technology can provide a smooth surface for die-casting parts, and has good dimensional accuracy and recognition ability. The wall thickness of die-casting is thinner than that of sand casting and metal casting