Boronization is a new surface hardening techniqueThe life of the boronized cone pulley will increase 25～3 times than that of unboronized onesThe parameters for the boronizing technique are:hardening temperature,T=900℃,and holding time,t=6 hoursThe results show:the depth of the boronized layer=014～02mm,surface hardness,HV=1 448～1 892,the hardness of the transition layer,HV=625～1 048

To introduce the design parameters calculation of the gradient and diameter of cone pulley,transmission system,drawing force and drawing power of 21/350 wet drawing machine in the condition of 95.