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Some causes of saw blade wear
Gnarled wear, excessive feeding speed or low precision of the tool, selection of grinding wheel and other factors, impact load of the blade belt is not well polished during the cutting process or poor toughness of the material, and the Angle of each surface of the tool will cause shedding of the blade belt.
Bonding wear, in the cutting plastic material, cutting and cutting front face workpiece and back cutting viscosity, the tool surface or local strength of the lower particles by cutting or workpiece bond belt grinding brush so that the tool wear.
Process and sharpening accuracy affect wear, alloy circular saw blade is a high-precision cutting tool, any main and secondary edge belt, end face cutting straight face, or radial cutting instead of on a cutting line, forming each alloy at the cutting point or depth and many other factors to reduce its use effect.
Tool wear, Angle design and the cutting material is not consistent, different hardness and all kinds of plastic materials are not targeted under the choice of appropriate alloy, also did not according to the hardness of the cutting material in dry cutting surface Angle impact so as to reduce the service life of the tool.
Phase change wear, alloy saw blade in a certain high-speed cutting friction process, the substrate or material when the temperature exceeds the phase change temperature, will make alloy saw blade edge belt accelerated wear, thus losing the cutting ability. Such as high-speed steel in 500-600°, 100° general steel, alloy steel 300-350°, 65 manganese steel 200° temperature will lead to matrix transformation.
Wear caused by mechanical wear or by grooves in the surface of a tool marked by the workpiece or cutting edge band. The lower the hardness ratio between the workpiece or cutting edge band ultra-high tool and the workpiece, the easier the tool is to wear, so the tool must have a higher hardness.
Diffusion wear, diffusion is a kind of chemical wear, diffusion wear is refers to the high temperature cutting tool and the alloy elements between the workpiece mutual diffusion, so that the tool material physical and mechanical properties of the reduction of aggravate tool wear. Adding titanium carbide or tantalum carbide into the cemented carbide can improve the diffusion temperature between the alloy and the substrate, thus improving the wear resistance and heat resistance of the cutting tool.
Oxidation wear, oxidation wear is the alloy saw blade at 800 degrees or higher friction temperature, oxygen in the air and alloy cobalt, tungsten carbide, titanium carbide and other oxidation caused by tool wear.