Views: 0 Author: J-VALVES Publish Time: 2024-07-05 Origin: Site
In the field of ball valve manufacturing, the precision casting process is a crucial link to ensure product quality and performance. With the continuous upgrading of industrial demands, the requirements for the accuracy, surface quality, and internal structural integrity of ball valves are becoming increasingly stringent. Optimizing the precision casting process has become an inevitable choice to enhance the competitiveness of ball valves.
To optimize the precision casting process, it is necessary to start from multiple dimensions. In the shell-making process, traditional sodium silicate shells are prone to problems such as insufficient strength and poor permeability. Silica sol shells can be used instead, which have better high-temperature resistance and surface finish, and can reduce surface defects of castings. At the same time, reasonably controlling the number of shell layers and drying time, and optimizing the permeability and strength of the shell are helpful for the better filling of molten metal and avoiding defects such as pores and misruns.
The smelting process has a profound impact on the quality of ball valve castings. Accurately controlling the alloy composition and adopting advanced smelting equipment and refining technologies, such as vacuum induction melting, can effectively remove impurities and gases and improve the purity of molten metal. At the same time, strictly control the pouring temperature and speed. According to the structural characteristics of the ball valve and the alloy properties, formulate reasonable pouring parameters to avoid coarse grains caused by too high temperature, or cold shuts and misruns caused by too low temperature and too slow speed.
