What should be paid attention to in the casting process of injection pump castings

When manufacturing jet pump castings, the casting process is a crucial link, which directly affects the quality, performance and reliability of the castings.

In terms of material selection, jet pump castings usually use high-strength, corrosion-resistant alloy steel or aluminum alloy and other materials. When selecting materials, it is necessary to fully consider the use environment, working temperature and stress conditions of the castings to ensure that the castings have sufficient strength and durability.

Mold design is an indispensable part of the casting process. It is necessary to comprehensively consider the shape, size and structure of the castings to ensure that the castings can accurately replicate the shape and size of the mold. At the same time, the cooling and shrinkage of the castings must also be considered to avoid defects and deformation.

A good gating system design is the key to ensuring the quality of castings. It can ensure that the molten metal fills the mold cavity evenly and avoids defects such as pores, inclusions and shrinkage. Reasonable gating system design can also reduce metal oxidation and slag inclusions and improve the quality of castings.

Controlling the pouring temperature is one of the important factors affecting the quality of castings. Too high a pouring temperature will cause metal oxidation and ablation, while too low a pouring temperature will affect the fluidity and filling of the metal. Therefore, the pouring temperature needs to be strictly controlled to ensure that the metal can flow fully and fill the mold cavity.

The cooling rate has an important influence on the structure and performance of the casting. Too fast cooling rate will lead to too dense and brittle structure, while too slow cooling rate will lead to loose structure and pores. Therefore, it is necessary to reasonably design the cooling system and control the cooling rate to obtain the ideal structure and performance.

During the casting process, the composition ratio of the metal alloy needs to be strictly controlled to ensure that the chemical composition of the casting meets the requirements. Too high or too low alloy composition will affect the performance and quality of the casting, so precise alloy ratio and control are required.

When smelting metal alloys, it is necessary to pay attention to controlling the smelting temperature and time to avoid metal oxidation and slag inclusion. In addition, degassing and desulfurization treatment are required to improve the purity and uniformity of the metal. Only through the fine control of the above process steps can the jet pump castings have excellent quality and performance.