Can Dalian blackening surface treatment improve the hardness of materials?

Dalian blackening surface treatment is a method of changing the surface structure and material properties of an object by enhancing its ability to absorb light, resulting in a blackening effect. There are various methods for treating blackened surfaces, and suitable methods can be selected according to different needs. Blackening surface treatment has important application value in some special industries and fields.

Oxidized blackening refers to the production of black oxides by heating or other means in a specific environment using a dense oxide film already formed on the surface of an object. This method is commonly used for aluminum and its alloy materials. In the process of oxidation blackening, it is necessary to first pre-treat the surface of the object, such as mechanical grinding, mechanical polishing, etc., and then place the object in a specific aqueous solution for heating treatment to cause oxidation reaction on its surface, forming a black oxide film.

Can Dalian blackening surface treatment improve the hardness of materials?

In the process of blackening surface treatment, processes such as pickling and quenching are often used to clean and treat the material surface. Acid cleaning can effectively remove impurities such as oxide layers, rust, and dirt on the surface of materials, ensuring a clean surface. During the quenching process, by heating the material to a certain temperature and rapidly cooling it, the internal lattice structure of the material is changed, thereby improving its hardness. These treatment processes can effectively increase the surface hardness of the material.

Secondly, by blackening the surface treatment, a layer of black oxide film or covering can be formed on the material surface. This layer of oxide film or covering has a certain hardness and wear resistance, which can protect the surface of the material. The oxide film or cover often has a certain hardness, which can effectively resist external physical and chemical erosion, and improve the surface hardness of the material. At the same time, they can also reduce the friction coefficient of the surface and improve the wear resistance of the material. Therefore, by blackening the surface treatment, the hardness of the material can be improved to a certain extent.

However, it should be noted that the improvement of material hardness by blackening surface treatment is limited and cannot completely change the hardness characteristics of the material. The hardness of a material is mainly determined by factors such as its chemical composition, crystal structure, and cold and heat treatment process. Blackening surface treatment only forms a layer of oxide film or covering on the surface of the material, which can improve the surface hardness and wear resistance, but has little effect on the overall hardness of the material. If it is necessary to significantly improve the hardness of the material, it is usually achieved by changing the composition of the material, alloying treatment, heat treatment, and other methods.

Blackening surface treatment has a wide range of applications, mainly used in some special industries and fields. For example, blackening treatment can improve the absorption performance of optical instruments and enhance their ability to absorb light. At the same time, blackening treatment can also improve the wear and corrosion resistance of the surface of the object, extending its service life. In addition, blackening surface treatment can also be used for some decorative purposes, such as making black jewelry and decorations.

Compared with some coating treatment methods, blackened surface treatment is less prone to peeling and wear. Coating treatment methods such as spraying, electroplating, etc. are more susceptible to external force damage due to the outer layer being a thin film, thereby reducing adhesion.