Metal investment casting parts are widely used for metal parts. The production cost of investment casting parts is relatively low, but the accuracy and strength are generally good. However, since investment casting is a low-pressure casting, it is easy to deform some thin-walled products or unsupported positions, which can easily lead to unsatisfactory product accuracy. In this case, we usually need to add subsequent processes to improve it, such as independently shaping the jigs to restore the deformed parts.

In marine projects or the shipbuilding industry, the environment in which they are used is full of salt, which has a strong corrosive effect on most metals. However, stainless steel, due to the chromium in its composition, can form a very thin and stable chromium oxide protective film on the surface, which can effectively prevent further oxidation and corrosion, making stainless steel perform well in high humidity and salty environments. Therefore, stainless steel metal parts are widely used in marine environments, and investment casting has the characteristics of being able to form products with complex shapes, being suitable for production of large and small batches, and having relatively low costs, so stainless steel investment castings are widely used in marine environments.