(1) high red hardness and wear resistance, good impact carbide; in no case impact load, should be used YT30, YT15, YG3 other tools materials.
(2) The tool angle, in general, with the improvement of hardened steel hardness should be increased before turning angle values. After the angle of the cutting high hardness of the steel is not greater than 6 °.
(3) finishing hardened steel tip should be smaller turning radius, usually rε≤0.3mm.
(4) the amount of turning hardened steel cutting, cutting to get higher, feed rate and cutting tool back to take smaller amounts.
