Analysis of domestic bearing die casting industry development, Huizhou Hardware Die Casting Factory


Date:

2019-07-22

Due to the impact of the euro crisis, the progress of domestic bearing export was blocked in the second half of 2011, but with the gradual removal of the cloud of European debt, coupled with the transformation and upgrading of large backbone enterprises in recent years, the initial effect of structural adjustment has begun to show.

Analysis of domestic bearing die casting industry development, Huizhou Hardware Die Casting Factory

Aluminum alloy die-casting zinc alloy die-casting aluminum alloy die-casting factory zinc alloy die-casting factory Dongguan aluminum alloy die-casting Dongguan zinc alloy die-casting hardware die-casting die casting die casting die casting die

Due to the impact of the euro crisis, the pace of domestic bearing export was blocked in the second half of 2011. However, with the gradual disappearance of the cloud of European debt, coupled with the transformation and upgrading of large backbone enterprises in recent years, the initial effect of structural adjustment has begun to appear

So this year, China's bearing exports have also gradually improved. Similarly, the increase in demand will also drive the development of die casting industry

According to the analysis of relevant experts in the industry, the output of China's bearing industry may reach 21 billion sets in 2012, and the main business income is expected to reach about 158 billion yuan at that time, with a growth rate of about 16% compared with 2011. The broad advance of the bearing industry will drive the development of the upstream die casting industry, so in 2012, the domestic bearing die casting industry will also follow the pace of development and make some achievements

Aluminum alloy die-casting zinc alloy die-casting aluminum alloy die-casting factory zinc alloy die-casting factory Dongguan aluminum alloy die-casting Dongguan zinc alloy die-casting hardware die-casting die casting die casting die casting die

Due to the impact of the euro crisis, the pace of domestic bearing exports was hindered in the second half of 2011. However, with the gradual disappearance of the cloud of European debt, and the transformation and upgrading of large backbone enterprises in recent years, the initial effect of structural adjustment has begun to appear

So this year, China's bearing exports have also gradually improved. Similarly, the increase in demand will also drive the development of die casting industry

According to the analysis of relevant experts in the industry, the output of China's bearing industry may reach 21 billion sets in 2012, and the main business income is expected to reach about 158 billion yuan at that time, with a growth rate of about 16% compared with 2011. The broad advance of the bearing industry will drive the development of the upstream die casting industry, so in 2012, the domestic bearing die casting industry will also follow the pace of development and make some achievements

Because aluminum alloy has severe oxidation and gas absorption tendency, and directly contacts with furnace gas or external atmosphere during smelting, if the control is slightly improper during smelting, aluminum alloy will easily absorb gas and form pores, most commonly pinholes. Pinholes usually refer to precipitation pores less than 1mm in the casting, which are mostly circular and unevenly distributed on the whole section of the casting, especially in the thick section of the casting and the part with low cooling rate. According to the distribution and shape characteristics of precipitation pores in aluminum alloys, pinholes can be divided into three categories

1. Reticular pinholes: In the macrostructure, pinholes are closely connected to form a network, with a few large holes. It is not convenient to check the number of pinholes per unit area, nor to measure the diameter of pinholes

2. Dot shaped pinholes: the pinholes in the macrostructure are in the form of round dots. The pinholes have clear outlines and are discontinuous with each other. The number of pinholes per square centimeter can be counted and their diameters can be measured. This kind of pinhole is easily distinguished from shrinkage cavity, shrinkage porosity, etc

3. Comprehensive stomata: It is the middle type of punctate pinholes and reticular pinholes. From the perspective of macrostructure, there are many large pinholes, but they are not dots but polygonal

The production practice of aluminum alloy metal die casting has proved that the main gas component of aluminum alloy forming pores due to air suction is hydrogen, and there is no certain rule to follow for its rising, often all or most aluminum alloy die castings in a furnace have pinholes; Materials are no exception. All kinds of aluminum alloys easily produce pinholes

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