The regional characteristics of China's foundry industry are also very distinct, and the foundry industry clusters in the “Yangtze River Delta” region, the Bohai Rim region and the Pearl River Delta have been formed. Industrial agglomeration in these areas will help create more opportunities for cooperation, and create interactions in training, finance, development, marketing, and export, and promote the development of the foundry industry. The “Yangtze River Delta” foundry industry cluster is currently the largest foundry industry cluster in China. It includes Shanghai, Jiangsu Province and Zhejiang Province. The annual output of castings is nearly 5 million tons, accounting for almost one-third of the country. Then the talent reserves of each region are also distributed according to the enterprise. In the west, including the southwest and northwest regions, due to economic development, the foundry industry has experienced an extremely rapid growth trend. The total output value, output, and technical content have also greatly increased the price of stainless steel precision castings. From the average salary, we can see the gap between the west and the east.

Stainless steel precision casting price

1. The scale of China's precision casting industry Although the mainland China casting industry has been established in the mid-1950s and gradually promoted and applied, the real rapid development is in the more than ten years from the early 1990s to the present, especially It is the last few years. At present, there are two types of horizontal casting processes in China's investment casting. The first type of enterprise adopts the investment casting process of medium temperature molding material and silica sol or ethyl silicate binder, which is the international common investment casting process. . The second type is the process of shelling with low temperature molding material and water glass binder. The dimensional accuracy and surface roughness of castings are worse than the first type, which is not up to the level of international investment casting. According to the situation in the mainland, there is a composite process using a medium-temperature or low-temperature molding, a surface layer using a silica sol, and a reinforcing layer using a water glass shell, which can reduce the low cost while ensuring high dimensional accuracy and surface quality. According to statistics, in 2001, more than 350 manufacturers of the first category were used, with an annual output of 75,000 tons and an annual output value of 3.28 billion yuan. The second type of process manufacturers (including composite processes) exceeded 1,350, with an annual output of nearly 200,000 tons. The output value is 1.5 billion yuan. In 2002, the output reached 321,000 tons and the output value reached 5.49 billion yuan. The output in 2002 was 6.4 times that of 1988. The output value was 16.6 times that of the 330 million in 1988.

2. Process level, casting quality and product category From the perspective of use and quality level, the castings produced by precision casting in China are mainly: castings for aviation and gas turbines produced by the first type of process, the quality has reached international level, and there are 50 manufacturers. The output is 0.5 million tons, and the annual output value is 400 million yuan. The commercial precision castings produced by the first type and composite process have lower quality inspection items and standards than aviation parts, and there are about 300, with an annual output of 70,000 tons and an annual output value of 28.8. 100 million yuan; adopting the second type of process to produce the investment precision castings with low dimensional accuracy and surface roughness requirements, there are about 1,350, the annual output is nearly 200,000 tons, and the annual output value is 1.5 billion yuan. It can be seen from the specific gravity distribution of the castings of the three quality levels that the high level of aviation precision castings has a small output, accounting for only 1.8% of the total output, and the general commercial castings account for 25.6%, and the quality is still below the international standard. Castings accounted for 72.6% of the total output. Compared with the market structure of investment castings in advanced countries and regions such as the United States, Britain, Europe and Japan, there is a clear gap, and the proportion of high-quality precision castings is still very low. Despite this, the various aspects of China's investment casting process have made great progress, and there are many new materials, new processes and new equipment that have a great influence on the development of investment casting.