Increasing the resistance of the cutting tool during heat treatment and coating

Metal cutting despite the development of methods for forming parts, metal cutting remains the leading process in the production of machines and mechanisms. The emergence of new construction materials, such as high-temperature, ultra-strong, difficult-to-melt steels and alloys, the ever-growing demand for precision and quality of machining sets new challenges for professionals. One of these methods is the use of various methods of chemical-thermal treatment and coating in the manufacture of cutting tools from high-speed steel. These methods can significantly improve a number of quality indicators, such as hardness, abrasion resistance, abrasion and corrosion resistance of the cutting tool. In this work, the first ion nitriding followed by the application of a wear-resistant coating was called combined ion-plasma treatment on an APP-2 type installation produced by MSTU “STANKIN” using a two-stage vacuum-arc gas discharge. Then, the high rate of heating and cooling allows structural-phase transformations in the surface layer, which cannot be realized in a stationary mode. The processing was carried out in the RITM-SP-M installation, which is a combination of a source of low-energy high-current electron beams “RITM” and two magnetron sputtering systems on one vacuum chamber. The last treatment used a disk cutter ((TiCr)N-(TiAl)N-(CrAlSi)N+ion nitriding, (TiAl)N+ion nitriding+ion doping(NbHf), (TiAl)N+ion nitriding, uncoated) coating installation π311 at Platit Switzerland. The results of the study are presented, a comparative analysis of the operation of disk cutters obtained by the method of forming without processing and multilayer, multicomponent coatings, when milling the SCh30 alloy. The performance of disc cutters removed before breakage was compared. Wear resistance tests were carried out at the Bukhara Mechanical Repair Plant when turning the SCh30 heat-resistant alloy.

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