The invention relates to the technical field of withdrawal and straightening roller heat treatment, and discloses a full-hardening withdrawal and straightening roller of a withdrawal and straighteningmachine and a heat treatment process. The full-hardening withdrawal and straightening roller comprises a roller body, the two ends of the roller body are both connecting ends, and the end surfaces ofthe two connecting ends are both provided with positioning counter bores. According to the full-hardening withdrawal and straightening roller of the withdrawal and straightening
machine and the heattreatment process, the purpose of preheating is to reduce the
temperature difference of a workpiece in all stages, the purpose of heat preservation in each temperature stage is to enable the temperature inside and outside the workpiece to reach the set temperature and then move upwards, bending and deformation of the workpiece during rapid heating and
quenching are effectively reduced, the
quenching heat
treatment time of the inner and outer
metal structures of the workpiece at the
quenching temperature is shortened, the heat treatment efficiency is effectively improved, and residual austenitic iron is converted into bast-field loose iron, so that on one hand, the
hardness of the workpiece can be improved, and on the other hand, deformation of the workpiece caused by temperature rise during use can be reduced; and local
tempering connecting ends are adopted, breakage during use is avoided, and the stability of the workpiece during use is guaranteed.