Investment Casting is to use fusible materials to make precise molds. Coating on the molds is used to make a multi-layer shell composed of refractory materials and cement strength adhesives. The shell is fired, the alloy is cast, and the casting is obtained. Because of the widespread use of paraffin-stearic acid mold materials for fusible molds, it is also called Lost Wax Casting. At present, commonly used Investment Castings mainly include stainless steel castings, carbon steel castings, alloy steel castings, aluminum castings, copper castings, and so on.

Investment casting has a long history in China. As early as the Shang Dynasty, our ancestors used similar methods to cast highly artistic bells and vessels, exquisite in shape and exquisite craftsmanship. In recent decades, due to the development of industry and science and technology, and the quality requirements of castings. The continuous improvement of the investment casting method has been widely used.

At present, investment casting is mainly used for the production of steam turbines, gas turbines, pump blades, complex instrument components, cutting tools, various weapons, electric and pneumatic tools and other parts. In recent years, investment casting has developed techniques such as surface refinement, vacuum directional casting and single crystal blade casting, which greatly improve the heat resistance and fatigue strength of high-speed blades, and extend the service life.

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