HRc≥53.Wearandheatresistanceathightemperature,badshockresistance.Hardfacingofthree-conebit.HRc≥53，高温下耐磨、耐热，但抗冲击较差。堆焊牙轮钻头HRc≥53.Wearandheatresistanceathightemperature,badshockresistance.Hardfacingofthree-conebit.HRc≥53，高温下耐磨、耐热，但抗冲击较差。堆焊牙轮钻头HRc≥53.Wearandheatresistanceathightemperature,badshockresistance.Hardfacingofthree-conebit.HRc≥53，高温下耐磨、耐热，但抗冲击较差。堆焊牙轮钻头HRc≥53.Wearandheatresistanceathightemperature,badshockresistance.Hardfacingofthree-conebit.HRc≥53，高温下耐磨、耐热，但抗冲击较差。堆焊牙轮钻头HRc≥53.Wearandheatresistanceathightemperature,badshockresistance.Hardfacingofthree-conebit.HRc≥53，高温下耐磨、耐热，但抗冲击较差。堆焊牙轮钻头)