1. SKF bearing chemical heat treatment to strengthen the use of solid diffusion infiltration of an element to change the chemical composition of the metal surface layer to achieve surface hardening method called chemical heat treatment, also known as diffusion heat treatment. (Note: Boronizing, infiltration, carburizing and carbonitriding, nitriding and nitrocarburizing, sulfurizing and sulfur-nitrogen-carbonitriding, chromizing, aluminizing, and chromium-aluminosilicate, graphitized layer And so on, with many different types and characteristics.) Infiltrate elements or dissolve into matrix metals to form solid solutions, or combine with other metal elements to form compounds. In short, infiltrating elements can change the chemical composition of the surface layer, and can also obtain different phase structures. The treatment process of carburized bearing steel parts and the surface nitriding strengthening treatment of needle roller bearing sleeves belong to this type of strengthening method.
2.skf bearing surface metallurgical strengthening using the re-melting and solidification of the surface layer metal of the workpiece to obtain the desired composition or structure of the surface strengthening treatment technology called surface metallurgy. (Note: surface auto-dissolving alloy or composite powder coating, surface melting and crystallization or amorphous processing, surface alloying and other methods.) The characteristics of the use of rapid heating with high energy density, the metal surface layer or coated on the metal surface The alloying material melts and then freezes on its own to obtain a special structure or a specific performance reinforcing layer. This particular structure may be a refined crystalline structure, or it may be a supersaturated, metastable, or even non-crystalline structure, depending on the surface metallurgical process parameters and methods. The rolling bearing industry has conducted laser heating enhancement studies on the micro-bearing working surfaces with good results.
3. SKF bearing surface heat treatment strengthen the use of solid-state phase-change bearings, through the rapid heating method of the surface layer of the parts quenched and called surface heat treatment, commonly known as surface quenching. (Note: flame heating quenching, high; medium and frequency induction heating quenching, laser heating or electron beam heating quenching, etc. These methods are characterized by: local surface heating quenching, small deformation of the workpiece; heating speed, high production efficiency; heating time Short, surface oxidative decarburization is very slight.) This method is especially effective for improving the wear resistance and fatigue strength of large and super large-sized bearing parts subjected to a certain impact load.
4. SKF bearing surface deformation strengthening SKF bearings through the mechanical method of metal surface layer plastic deformation, resulting in the formation of high hardness and high strength of the hardened layer, this surface hardening method is called surface deformation strengthening, also known as work hardening. (Note: shot peening, sand blasting, cold extruding, rolling, cold milling and impact, blast impact strengthening, etc.) The characteristics of these methods are: increased density of dislocations in the strengthening layer, refinement of subgrain structure, and thus hardness The increase in strength and the reduction in the surface roughness value can significantly increase the surface fatigue strength of the part and reduce the sensitivity of the fatigue notch. This kind of strengthening method has a simple process and significant effect, there is no obvious boundary between the hardened layer and the substrate, and the structure is consistent, and it is not easy to fall off during use. Most of these methods have been applied in the bearing industry: the application of this type of method to the surface impact strengthening of rolling elements has become a new method of processing and strengthening ferrules.
5.SKF bearing surface film strengthening SKF bearing application of physical or chemical methods, in the metal surface coated with a matrix material with different properties of the strengthening layer, called surface film strengthening. It includes electroplating, electroless plating (chrome plating, nickel plating, copper plating, silver plating, etc.) and composite plating, brush plating, or conversion processing, as well as high technology that has developed rapidly in recent years: CVD, PVD, P-CVD, etc. Vapor deposition thin film enhancement methods and ion implantation surface enhancement techniques (also known as atomic metallurgy techniques) and the like. Their common feature is the ability to form specific properties of the film on the work surface to enhance the wear resistance, fatigue resistance, corrosion resistance and self-lubricating properties of the surface. For example, the ion implantation technique strengthens the bearing working surface, which can significantly improve the wear resistance, corrosion resistance, and contact fatigue resistance of the bearing working surface, thereby doubling the service life of the bearing.
2.skf bearing surface metallurgical strengthening using the re-melting and solidification of the surface layer metal of the workpiece to obtain the desired composition or structure of the surface strengthening treatment technology called surface metallurgy. (Note: surface auto-dissolving alloy or composite powder coating, surface melting and crystallization or amorphous processing, surface alloying and other methods.) The characteristics of the use of rapid heating with high energy density, the metal surface layer or coated on the metal surface The alloying material melts and then freezes on its own to obtain a special structure or a specific performance reinforcing layer. This particular structure may be a refined crystalline structure, or it may be a supersaturated, metastable, or even non-crystalline structure, depending on the surface metallurgical process parameters and methods. The rolling bearing industry has conducted laser heating enhancement studies on the micro-bearing working surfaces with good results.
3. SKF bearing surface heat treatment strengthen the use of solid-state phase-change bearings, through the rapid heating method of the surface layer of the parts quenched and called surface heat treatment, commonly known as surface quenching. (Note: flame heating quenching, high; medium and frequency induction heating quenching, laser heating or electron beam heating quenching, etc. These methods are characterized by: local surface heating quenching, small deformation of the workpiece; heating speed, high production efficiency; heating time Short, surface oxidative decarburization is very slight.) This method is especially effective for improving the wear resistance and fatigue strength of large and super large-sized bearing parts subjected to a certain impact load.
4. SKF bearing surface deformation strengthening SKF bearings through the mechanical method of metal surface layer plastic deformation, resulting in the formation of high hardness and high strength of the hardened layer, this surface hardening method is called surface deformation strengthening, also known as work hardening. (Note: shot peening, sand blasting, cold extruding, rolling, cold milling and impact, blast impact strengthening, etc.) The characteristics of these methods are: increased density of dislocations in the strengthening layer, refinement of subgrain structure, and thus hardness The increase in strength and the reduction in the surface roughness value can significantly increase the surface fatigue strength of the part and reduce the sensitivity of the fatigue notch. This kind of strengthening method has a simple process and significant effect, there is no obvious boundary between the hardened layer and the substrate, and the structure is consistent, and it is not easy to fall off during use. Most of these methods have been applied in the bearing industry: the application of this type of method to the surface impact strengthening of rolling elements has become a new method of processing and strengthening ferrules.
5.SKF bearing surface film strengthening SKF bearing application of physical or chemical methods, in the metal surface coated with a matrix material with different properties of the strengthening layer, called surface film strengthening. It includes electroplating, electroless plating (chrome plating, nickel plating, copper plating, silver plating, etc.) and composite plating, brush plating, or conversion processing, as well as high technology that has developed rapidly in recent years: CVD, PVD, P-CVD, etc. Vapor deposition thin film enhancement methods and ion implantation surface enhancement techniques (also known as atomic metallurgy techniques) and the like. Their common feature is the ability to form specific properties of the film on the work surface to enhance the wear resistance, fatigue resistance, corrosion resistance and self-lubricating properties of the surface. For example, the ion implantation technique strengthens the bearing working surface, which can significantly improve the wear resistance, corrosion resistance, and contact fatigue resistance of the bearing working surface, thereby doubling the service life of the bearing.
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