OBRABOTKAMETALLOV Vol. 24 No. 1 2022 technology Ta b l e 2 Temperature measurement results and corresponding theoretical calculations for milling Experiment No. 1 2 3 4 5 6 7 Texp, °С 327 280 294 374 206 273 237 Tcalc, °С 342 276 316 349 216 264 231 V, m/min 15.7 15.7 15.7 22 7.9 22 15.7 Sz, mm/tooth 0.0175 0.0095 0.0135 0.0095 0.0055 0.0055 0.0015 Fig. 5. Dependence of the cutting temperature on the cutting speed and feed during milling of nickel based alloy 56% Ni-Cr-W-Mo-Co-Al Conclusion As a result of the research, it was found that the maximum temperature value during milling of 56% Ni-Cr-W-Mo-Co-Al alloy with cutting speed V = 15.7 m/min, milling depth = 0.1 mm and feed Sz = 0.0175 mm/tooth was achieved on the face surface and amounted to 730 oС, while on the flank surface of the tool the temperature reached 450 oС. The cutting temperature was 327 °C. Comparison of experimental studies of milling heat-resistant alloy 56% Ni-Cr-W-Mo-Co-Al, with a change in cutting conditions (changed feed per tooth and cutting speed) with theoretical data, gave a satisfactory result with a confidential interval of 5%. On the basis of experimental data, it can be concluded that this method makes it possible to calculate (predict) theoretically the temperatures on the face and flank surfaces of the cutting blade, as well as the cutting temperature, without labor-consuming and costly experimental studies. The same method can be extended to other grades of heat-resistant alloys (77% Ni-Cr-Ti-Al-B, 66% Ni-CrMo-W-Ti-Al, 73% Ni-Cr-Mo-Nb-Ti-Al), since there is only one defining equation for it. When calculating, it is only necessary to change the values of its physical and mechanical characteristics. In the future, this method of theoretical calculation of temperature can be used to determine the minimum (reasonable) wear rate of the cutting tool.
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