NEWS

In the process of surface treatment of special wear-resistant alloy steel, the physical and chemical characteristics of the surface material of the product are greatly changed by the interaction of external input energy, alloy elements or materials with the surface of the product. The microscopic nature of surface treatment is the controllable physical and chemical changes on the surface of the material, which has excellent properties different from gases.

Different energy input methods will produce physical and chemical effects on the surface of the material, forming different surface structures. According to the effect of special wear-resistant alloy steel surface treatment, surface treatment can be divided into the following three categories:

Mechanical action: Special alloy steel surface due to simple mechanical action, strengthen the spraying, rolling, hole extrusion and other surface deformation. The treated surface has anti-fatigue properties.

Physical effect: Due to the effect of energy on the surface of special alloy steel, physical changes or new coatings are formed on the surface. There are many processes of surface treatment through physical effects. For example, surface phase transformation strengthening, thermal spraying, surface ion implantation, chemical physical deposition, laser melting and other surface treatments are more. Improve surface fatigue resistance, wear resistance, corrosion resistance.

Physical and chemical effects: the surface of special alloy steel diffuses and reacts with elements under the action of energy, inducing surface treatment processes such as carburizing, nitriding, carbon-nitrogen infiltration and other metal elements infiltration.

Surface Chemical Heat Treatment Technology of Wear-resistant Alloy Steel

The method of changing the chemical composition of the surface layer of a special alloy by using the solid diffusion penetration of an element to achieve surface strengthening is also called surface chemical heat treatment strengthening and diffusion heat treatment. Including carburizing and carbon-nitrogen infiltration, nitriding and nitrogen-carbon infiltration, sulfur and sulfur-nitrogen-carbon infiltration, chromium-chromium, aluminum and chromium-aluminum-silicon infiltration, graphitized infiltration layer boronizing, infiltration metal, etc., with a variety of characteristics. Penetration elements or dissolved in the gas metal to form a solid solution or combined with metal elements to form compounds. Penetrating elements can not only change the chemical composition of the surface layer, but also obtain different phase structures. Among them, carburizing and nitriding plasma chemical heat treatment methods can be widely used by changing the surface state of special alloy steel parts or components to improve wear resistance, corrosion resistance and heat resistance.

Carburizing process of special wear-resistant alloy steel

The carburizing process of special wear-resistant alloy steel has very important practical value. Bearings, gears, molds, tools and other special alloy steel products surface to withstand wear, fatigue, mechanical load and chemical corrosion and other loads, through carbon penetration to achieve high surface hardness, high wear resistance, fatigue strength and corrosion resistance. There is no need to treat special wear-resistant alloy steel by alloying or other complicated process means. It not only reduces the cost, but also maintains the toughness after deep quenching, so that the product can withstand the impact load. Conform to the direction of energy saving, reducing consumption and sustainable development. Carburizing generally selects high-quality low-carbon or carbon alloy steel, which has the advantages of cold working performance, impact, wear resistance after carburizing, and contact fatigue life.