Keywords cryogenic treatment, high speed steel, friction and wear,,,,, martensite, twin, axial ratio, retained austenite, carbon content, antiwear ability;

• 深冷处理;高速钢;摩擦磨损;马氏体;孪晶;轴比;残余奥氏体;碳化;物;含碳量;耐磨性;