Design indicators of wear and resistance of grooving cutters with the wear-resistant coatings

The article considers method of calculating the rate of wear, ageing and resistance of the hard alloyed grooving cutters with the wear-resistant coatings on the example of machining workpieces made of corrosion-resistant steel. Polynomial equations were used characterizing the drop in hardness of the wear-resistant coatings as a function of temperature. Limiting value of the linear wear along the back surface of the coated hard alloyed cutters was obtained. Wear and resistance dependences on cutting speed, thickness and width of the cut layer were calculated. It was shown that cutting speed for the hard alloyed cutters with the wear-resistant coatings could be increased by 2–3 times compared to the tool speed without coatings. Limiting values of speed and cutting temperature were determined providing resistance of at least 10 minutes.

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