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Guangxi Science and Technology Department organized relevant experts to appraise the scientific and technological achievements of the “Research on the Utilization of Residual Heat and Heat Treatment Processes of Engine Blocks and Cylinder Heads†completed by Guangxi Yuchai Machinery Co., Ltd. (hereinafter referred to as Yuchai). The experts have identified that the project has independent intellectual property rights and innovation, and it has reached the leading domestic and international advanced level. The project is in line with the national energy-saving and emission-reduction policy, has significant economic and social benefits, and has broad application prospects.
Excessive residual stress in castings can easily lead to deformation and cracking of castings, affecting the quality of castings and further processing. For the first time, this project proposes the aging heat treatment process using residual heat of castings and electric auxiliary heating, and applies it to the aging heat treatment process of engine blocks, cylinder heads and other castings, and innovative electric auxiliary heating device and its heat treatment process. At present, the use of this technology has achieved significant results. First, the effect of reducing residual stress in castings is significant. The average residual stress of the casting after the treatment is less than 20MPa, which is lower than that of the domestic traditional heat treatment. The second is the significant reduction of energy consumption. After three years of practical application, the total energy saving of the project is 112.6. Wanjoer, equivalent to 4124.7 tons of standard coal, has achieved remarkable economic benefits. Third, it reduces the space occupied by the traditional aging heat treatment process, improves the utilization rate and production efficiency of the workplace, and greatly reduces the heat emission. Workers' operating environment and logistics are smooth.
According to Yuchai related personnel, the technical achievements of the project will be further promoted and applied in the casting center under construction in Yuchai.
View related topics: Yuchai won the "China Brand Annual Award NO.1" (internal combustion engine) title in 2007