Bauman Moscow State Technical University (Moscow, Russia):

V. M. Yaroslavtsev, Dr. Eng., Professor of the Chair of Material Processing Technologies Department, e-mail: mt13@bmstu.ru
N. A. Yaroslavtseva, Cand. Eng., Associate Professor of the Chair of Material Processing Technologies Department

It is shown that it is possible to improve the machinability by cutting bar workpieces from the heat-resistant casting alloy ZHS6KP obtained by multi-stage rolling, by purposeful control of deformation processes directly in the processing zone using the cutting method with advanced plastic deformation. The method uses a consistent energy effect on the material of the cut layer of two working tools: a strengthen and a cutting tool. The results of studies showing a significant reduction in the specific work of Ar cutting and as a consequence of this reduction in the cutting force and temperature in the cutting zone, which take place when turning the alloy ZHS6KP with pre-deformed layer of material. The extreme character of experimentally obtained graphic dependences of change of specific work of cutting and its components on specific load q created by the additional strengthening device is presented. The area of the most favorable working conditions of the cutting tool for the given values of the cutting mode parameters when using treatment with hardening of the surface layer of the processed material is specified. Experimental data of comparative resistance tests conducted at optimal load q, found an increase in the period of resistance of the cutting tool when turning with advanced plastic deformation of the alloy ZHS6KP depending on the selected cutting conditions S_o = 0,15...0.36 mm/Rev; v = 0.13...0.3 m/s; t = 1...4 mm 1.7 to 4 times. This increase in the period of resistance can significantly intensify the machining of the alloy, increasing productivity by increasing the cutting speed or feed, or while maintaining the existing modes by reducing the auxiliary time spent on the maintenance of the cutting tool.

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