Quantitative wear indicators in carbide tools with variation in hardness

The paper considers the method of calculating the rate of deterioration, wear and durability in the carbide tools on the example of prefabricated cutters with the replaceable polyhedral inserts, including those with the wear-resistant coatings. Equations are proposed that relate wear rate of the tool back surface with the cutting speed and the tool material hardness, as the cutting temperature function. It is shown that practical implementation of the calculation method is appropriate for stable conditions with coefficients in variation of the processed and tool material hardness within the 0.1 limit.