How to let KOYO bearing steel surface strengthening

Many bearing enterprise to use bearing steel all is not good enough, and even some inferior bearing steel, thus result in low bearing product, such as KOYO bearing manufacturing enterprise is different, use bearing steel all is the best quality. But we are here to tell you about how to make KOYO bearing steel surface strengthening. Imported bearing parts work surface and center in the state, there is a large difference in structure and performance requirements, and could not have heat treatment tends to make the whole, also not give full play to the material. Applied materials surface strengthening technology can not only solve the surface and center differences in structure and requirements, but also can make further surface to obtain specific performance, in order to meet the work under certain conditions of SKF bearing on the working surface performance requirements. This makes sense in the modern science and technology development. On the traditional method of surface strengthening technology belongs to the category of the heat treatment. And developed the modern laser and electron beam and ion beam surface strengthening method, not only will some high and new technology applied in the material surface strengthening, and in the process is beyond the traditional heat treatment category, form the new technology. So the surface strengthening technology can be classified from different Angle to form a variety of methods, according to the chemical and physical process of surface strengthening technology classification, can be roughly divided into five categories: surface deformation strengthening heat treatment, surface strengthening, the chemical heat treatment, surface metallurgy strengthening, film surface strengthening. 1. Chemical heat treatment to strengthen an element of solid state diffusion infiltration, to change the chemical composition of the metal surface layer, in order to realize the surface strengthening method called chemical heat treatment to strengthen, also known as diffusion heat treatment. Includes boronizing, metallic cementation, carburizing and carbonitriding, nitriding carbon and nitrogen altogether permeability, ooze sulfur and sulfur nitrogen carbon altogether permeability, chromizing, aluminized and chrome aluminum silicon, graphitization permeability layer and so on, variety and characteristics of each different. Infiltration of elements into matrix metal forming solid solution, or with other metal elements combine to form compounds. Anyhow into elements that can change the surface chemical composition, and can get different phase structure. Carburizing KOYO bearing steel parts processing technology and needle KOYO bearing sleeve of nitriding surface strengthening treatment of this kind of reinforcement method. 2. Surface deformation strengthening by mechanical method of plastic deformation in the metal surface, so as to form a hardening layer with high hardness and high strength, this kind of surface strengthening method called surface deformation strengthening, also known as work hardening. Including shot peening, sandblasting, cold extrusion, rolling, cold grinding and impact and explosion shock processing, etc. The characteristics of these methods are: strengthening layer increased dislocation density, the crystal structure refinement, so that the hardness and strength increased, the surface roughness value decreases, and can significantly increase the surface fatigue strength of parts and reduce fatigue notch sensitivity. This process is simple, effective reinforcement method, there is no obvious boundaries between hardening layer and matrix, the coherent structure and not easy to fall off in use. Its most method has been applied in the KOYO bearing industry: roller surface strengthening is the application of this kind of method, precision rolling has become a new ring processing and strengthening method. 3. Surface strengthening heat treatment using solid-state phase transformation, surface layer of parts by using the method of rapid heating treatment called surface quenching heat treatment, commonly known as surface hardening. Including flame heating quenching, high ( C) Frequency induction heating quenching, laser heating or electron beam heating quenching, etc. The characteristics of these methods are: local heating surface quenching, workpiece deformation; Heating speed, high production efficiency; Short heating time, the surface oxidation decarburization is very slight. Especially to improve the method under a certain impact load of large and super large KOYO bearing parts abrasion resistance and fatigue strength effect is remarkable. 4. Surface metallurgy reinforcement of workpiece surface layer metal melting and solidification, in order to get the desired composition or organization's surface strengthening treatment technology, called surface metallurgy strengthening. Including surface autolyzed alloy or composite powder coating, surface melting crystalline or amorphous processing, such as the surface alloying method. Is characterized by rapid heating using high energy density, the metal surface layer or coating on metal surface alloying material melt, then on their own solidification cooling to get special structure strengthening layer or specific performance. This special structure may be refine crystal organization, also perhaps is supersaturated and metastable phase, even amorphous organization, depending on the process parameters and methods of surface metallurgy. Scroll KOYO bearing industry worked in miniature KOYO bearing working surface laser heating processing research, the result is good. 5. Surface film to strengthen