Stainless steel precision casting or investment casting, silica sol process. It is a casting process with little or no cutting, and it is an excellent process technology in the foundry industry.
Its application is very wide, not only suitable for casting of various types and alloys, but also the dimensional accuracy and surface quality of the produced castings are higher than other casting methods, and even other casting methods are difficult to cast, high temperature resistance, and difficult to cast. The processed castings can be cast by investment casting.
Investment casting is developed on the basis of ancient wax casting. As an ancient civilization, China is one of the earliest countries to use this technology. As far back as hundreds of BC, the ancient working people of our country created this lost wax casting technology, which was used to cast various fine patterns and characters. The bells, tripods and utensils, such as the tomb of Zenghou Yi in the Spring and Autumn Period. The base of the tomb of Zenghou Yi is composed of multiple intertwined dragons, which are connected end to end and staggered up and down to form a hollow multi-layer moire pattern in the middle. These patterns are difficult to produce by ordinary casting techniques, but are cast by the lost wax method. The craftsmanship can take advantage of paraffin wax’s lack of strength and ease of engraving. Ordinary tools can be used to engrave crafts made of paraffin wax that are the same as the tomb of Zenghou Yi’s tomb, and then a pouring system, coating, dewaxing, and pouring can be added. You can get the exquisite tomb plate of Zenghouyi.
The practical application of modern investment casting methods in industrial production was in the 1940s. The development of aviation jet engines at that time required the manufacture of heat-resistant alloy parts such as blades, impellers, nozzles, etc., with complex shapes, accurate dimensions, and smooth surfaces.