In the process of die-casting mold manufacturing, surface treatment is a crucial link, which can directly affect the quality and performance of the final product. There are many ways to treat the surface of die-casting molds, each of which has its own characteristics and applicable scenarios.

Polishing is a common surface treatment method that can make the mold surface smooth and bright, and improve the wear resistance and corrosion resistance of the mold. Polishing is usually divided into two methods: mechanical polishing and chemical polishing. Mechanical polishing removes defects and roughness on the mold surface and improves the surface finish through mechanical processing methods such as grinding and polishing. Chemical polishing corrodes and treats the mold surface through chemical solutions, so that the surface obtains a smooth oxide film, improving the surface quality and glossiness.

Chrome plating is a commonly used surface treatment method that can increase the hardness, wear resistance and corrosion resistance of the mold surface. Chrome plating is usually carried out by electroplating or chemical chromium plating. By forming a uniform chromium layer on the mold surface, the surface hardness and gloss of the mold are improved, and the service life of the mold is extended.

Coating treatment is a common surface treatment method that can improve the wear resistance, corrosion resistance and anti-adhesion of the mold. Common coatings include oiling, spraying, sandblasting, ceramic spraying, etc. These coatings can effectively reduce friction and wear on the mold surface and extend the service life of the mold.

Nitriding treatment is a way to improve the hardness and wear resistance of the mold surface. By forming a nitride layer on the mold surface, the hardness and wear resistance of the mold can be effectively improved and the service life of the mold can be extended. Nitriding treatment usually includes nitrogen gas nitriding, salt bath nitriding and ion nitriding.

Sandblasting is a commonly used surface treatment method that can improve the roughness and finish of the mold surface and improve the surface quality and appearance of the mold. Sandblasting usually sprays sand particles onto the mold surface through high-pressure airflow to remove the surface oxide layer and defects, making the mold surface smoother and more uniform.