Tool along with shock and vibration, temperature fluctuations caused by cutting

Metal cutting process, cutting tool parts at high temperatures under a lot of cutting force and intense friction. In intermittent cutting work, accompanied by shock and vibration,  cubic boron nitride  fluctuations caused by the cutting. Thus, cutting tool material should have a high hardness and high wear resistance, sufficient strength and toughness, high heat resistance. Tool materials at room temperature generally should have a  grinding wheel  of 60HRC or more. The higher the hardness the better wear resistance, but the impact toughness is reduced relatively. Therefore, the required tool material while maintaining sufficient strength and toughness conditions, as a high hardness and wear resistance.