Application of Investment Precision Casting in Auto Parts Industry
Chinese automobile investment precision casting technology has developed rapidly,and can produce endless casting products by adopting the new net fractal technology. The process of investment precision casting mainly are silicate shell making process(also called water glass shell making process), compound shell making process, silicon sol shell making process.Material for auto products are carbon steel, alloy steel, nonferrous alloy and ductile iron.High alloy steels and super alloy material are mainly used abroad. Domestic smelting equipments use ordinary and fast frequency furnace while foreign ones adopt vacuum furnace, converter, high frequency furnace.Surface roughness of parts that are manufactured by silicon sol shell making process can reach Ra1.6 µm and the dimension precision can reach grade CT4 , minimum wall thickness can reach 0.5 ~ 1.5 mm.
Europe, America, Japan and other countries begin to pay close attention to the application and development of casting in the auto industry. The demand market of Chinese automobile casting is in continuing growth and development, The output of casting in 2003 is 0.6 million tons which values $1.1 billion. Henan SEBON auto casting adopts silicon sol and water glass shell making technology with high tech content, makes originally casting, forgings, machining and assembly structure into a complete precision casting system, and significantly reduces the production cost.
The developing trend of investment precision casting forming process is that future casting products getting closer to components, the traditional casting is only a roughcast, and can no longer adapt to the changeable market. The complexity of the product and the quality class are higher and higher,means of research and development is stronger and stronger, professional coordination begins to appear, applications of CAD, CAM, CAE become the main technology in components development. Henan BEBON certainly can develop rapidly due to powerful r&d strength and advanced technology.
