29
2022
-
07
Anti-shrinkage process measures of hardware precision casting manufacturers
Author:
During the production process of precision casting, shrinkage cavity and shrinkage porosity reduce the effective area of the casting, and it is easy to generate stress concentration in the hole, which reduces the mechanical properties of the casting.
During the production process of precision casting, shrinkage cavity and shrinkage porosity reduce the effective area of the casting, and it is easy to generate stress concentration in the hole, which reduces the mechanical properties of the casting. Shrinkage cavities and shrinkage porosity also reduce the air tightness, physical properties and chemical properties of castings. When the shrinkage cavity and shrinkage porosity are serious, the casting has to be scrapped. Today, Yufeng Metal, a precision casting manufacturer, talks about the shrinkage-proof process measures of hardware precision casting manufacturers.
During the condensation process of the liquid alloy, if the volume reduced by the liquid shrinkage and solidification shrinkage cannot be replenished, some holes will be formed in the final solidified part of the casting. The large and concentrated ones are called keyholes, and the small and scattered ones are called shrinkage porosity. The fundamental measure to prevent shrinkage cavities in castings is to use directional solidification. The process of gradually solidifying a casting from one part to another in a specified direction. According to the order of directional solidification, the shrinkage of the first solidified part is supplemented by the molten metal in the latter solidified part; the shrinkage of the latter solidified part is supplemented by the molten metal of the riser or gating system, so that the shrinkage of each part of the casting can be supplemented , and transfer the shrinkage cavity to the riser or gating system of the excess part of the casting.
properties ,generate
Previous page
undefined