Dalian investment casting is a near net shape process that can produce precision castings. It has a long history in China and is one of the significant contributions that China has made to the world casting industry. Investment casting is an excellent process technology in the casting industry, which involves less cutting and no cutting. Below, Dalian precision casting manufacturer will explain the characteristics of investment casting.

It can cast complex castings of various alloys, especially high-temperature alloy castings, such as the blades of jet engines. Its streamlined outer profile and cooling inner cavity are almost impossible to form using mechanical processing technology. Production using investment casting technology can not only achieve mass production, ensuring the consistency of castings, but also avoid stress concentration of residual blade lines after mechanical processing.

The dimensional accuracy of investment castings is relatively high, generally up to CT4-6. However, due to the complex process of investment casting, there are many factors that affect the dimensional accuracy of castings, such as shrinkage of the mold material, deformation of the investment mold, linear changes in the mold shell during heating and cooling, shrinkage rate of the alloy, and deformation of the casting during solidification. Therefore, although the dimensional accuracy of ordinary investment castings is relatively high, their consistency still needs to be improved.

When pressing investment molds, a high surface smoothness of the mold cavity is used, so the surface smoothness of the investment mold is also relatively high. In addition, the mold shell is made of a refractory coating made of high-temperature resistant special binders and refractory materials, which is coated and hung on the investment mold. The surface smoothness of the mold cavity directly in contact with the molten metal is high. Therefore, the surface smoothness of investment castings is higher than that of general castings, generally up to Ra.1.3.2 μ M.

The greater advantage of investment casting is that due to its high dimensional accuracy and surface smoothness, it can reduce mechanical processing work. Only a small amount of machining allowance can be left in the parts with higher requirements, and even some castings can be used with only grinding and polishing allowance without mechanical processing. It can be seen that using investment casting method can greatly save machine equipment and processing time, Significantly save metal raw materials. The above is the complete answer about the characteristics of investment casting, hoping to be helpful to everyone!