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Among the seven different high-temperature alloys, Alloy GH3044 is a high-temperature alloy recently developed by Beijing Iron and Steel Research Institute. Due to the huge casting weight of GH3044 and the net weight of 2 tons, GH3044 is difficult to manufacture with modern precision technology. The technicians of Zhejiang High and Medium Pressure Valve Co., Ltd. read a lot of materials and used many years of experience to simulate casting, cutting and heat treatment of castings. The test finally solved the sand casting of GH3044. At present, the sand casting method of GH3044 superalloy also applies for a national invention patent.
Some experts commented that the successful trial production of GH3044 alloy castings not only improved the traditional process of smelting, but also promoted the development of nuclear industry, shipbuilding industry and China's valve industry, and the castings can be used in electric power, metallurgy, boilers, medicine, etc. The national key construction project industry will bring new opportunities for the development of Lin'an industry.
Zhejiang High and Medium Pressure Valve Co., Ltd. successfully developed the imported fast closing valve device of the first large-scale wind tunnel inflow test device in China. The device, which weighs 5.5 tons, is adapted to a medium temperature of 750 degrees Celsius, and only the internals of the valve unit consist of seven different superalloys.