Dalian castings play an irreplaceable role in modern industrial production, and are widely used in fields such as automobiles, aerospace, ships, and mechanical equipment. With the continuous development of technology, casting technology is also constantly innovating, resulting in continuous improvement of the quality and production efficiency of castings. As an important metal product, castings will continue to contribute to industrial production.

Castings have a wide range of applications in various fields such as mechanical manufacturing, automotive manufacturing, aerospace, construction, and electricity. For example, in agricultural machinery, the proportion of castings is 40% -70%; In machine tool manufacturing, 70% -80% of the weight is castings; In automobile manufacturing, engine cylinder blocks, cylinder heads, gearbox housings, etc. are all cast parts.

What are the common quality problems and solutions for castings in Dalian?

Pores: Pores are one of the common quality issues in castings, which may be caused by factors such as casting temperature, pressure, and fluidity. The solutions include optimizing process parameters, increasing pouring temperature and speed, and improving the pouring system.

Tumor: Tumor is a lump or crystalline protrusion formed by metal during the solidification process, which affects the appearance and performance of the product. The solutions include optimizing the grain structure, adding appropriate deformation agents, and controlling the solidification rate.

Shrinkage: Shrinkage is a hole formed by uneven shrinkage of metal during solidification, which affects the mechanical properties and sealing of the product. The solutions include increasing the pouring temperature and speed, changing the alloy composition, and adopting a suitable pouring system.

Cracks: Cracks are fracture phenomena caused by excessive internal stress, uneven material structure, and other reasons, which can lead to product failure. The solutions include controlling the cooling rate, adopting appropriate preheating processes, and adding compensation structures.

Inclusions: Inclusions refer to foreign objects or inclusions that appear in castings, which may affect the strength and wear resistance of the product. The solutions include strict control of raw material quality, optimization of processing technology, and adoption of appropriate cleaning techniques.

Cast parts are metal formed objects obtained by various casting methods. The liquid metal that is about to be smelted is injected into a pre prepared mold using casting, injection, suction, or other casting methods. After cooling, it is polished and processed to obtain an object with a certain shape, size, and performance.

The production process of castings includes steps such as model design, mold making, melting metal, pouring and forming, cooling and solidification, and subsequent processing. Create a model according to the design requirements of the product. Then, a casting mold is made based on the model, usually using materials such as sand molds and metal molds. After melting the metal, pour the melted metal into the mold and take it out after solidification to obtain the cast part.