The laser cladding materials using the laser cladding process mainly include: nickel-based alloys, cobalt-based alloys, iron-based alloys, and tungsten carbide composite materials, among which nickel-based materials are most used, and the cutting force is high due to high hardness after laser cladding. And the cutting temperature is high, which affects the tool life. This requires the heat resistance and wear resistance of the tool after laser cladding, and it needs to have certain impact toughness, especially when the surface of the cladding layer is uneven. Based on this, Hualing Superhard developed the BN-S20 grade tool, which is harder than cemented carbide tools and ceramic tools, when the surface of the cladding is relatively high or the surface of the laser is relatively high. Moreover, it is superior in toughness to ceramic tools, and it can cut long-time large-sized roller-type parts after laser cladding, and can withstand the impact of hard spots or bumps on the surface of the cladding.
The BN-S20 grade tool performs turning machining on the shaft and disc parts after laser cladding instead of grinding (by car grinding), which not only improves the processing efficiency, but also achieves a surface roughness of Ra0.4-Ra0. 6, the finish is basically up to the level of ordinary grinding machines. Widely used in metallurgical rolls, air compressor rotors, large crankshafts, pump shafts, compressor rotors, hydraulic support column pillars and other shaft-type laser cladding repair processing (in the car grinding). BN-S20 grades can be finished in one step when machining laser cladding workpieces, reducing the number of transfers and reducing the probability of quality problems such as bumps caused by transfer. . The roughness of the whole workpiece processed by the car is more uniform than that of the ordinary grinding machine, and the large amount of grinding burn is avoided, and the cost is saved by about 40% compared with the grinding.
With the development of modern manufacturing technology, more and more new tool materials are continuously applied to CNC machine tools. Therefore, reliable tool materials will further help the application field and development of laser cladding technology.
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