当高速钢拉刀的刃口磨损而不能继续使用时,可用冷挤压的方法修复使用。冷挤压修复拉刀,就是用硬质合金车刀挤压拉刀的前刃面,使拉刀在径向产生0.005～0.05毫米的微量塑性变形,来补偿其磨损量。同时,由于挤压的冷作硬化作用,可使拉刀前刃面的光洁度、硬度和耐磨性都有显著提高。 When the high-speed steel broach edge wear and can not continue to use, cold extrusion method can be used to repair. Cold extrusion repair broaches, is to use the carbide knife squeegee front razor blade, so that the broach in the radial 0.005 ~ 0.05 mm trace plastic deformation to compensate for the amount of wear. At the same time, due to the role of cold extrusion hardening, can make broach front blade surface finish, hardness and wear resistance are significantly improved.