Stepping type heating furnace for heat treatment

The present invention discloses a walking-beam furnace for the heat treatment, and to provide a scrolling distance so that the longest edge of the sleeve is less than the length of the working, resulting in the sleeve can not stay in the bottom of the tooth, more uniform heating, the heating can be reduced temperature control accuracy, energy saving walking-beam furnace for the heat treatment. Top straight teeth and tooth bottom through each working tooth addendum vertical, through the same working teeth and the bottom horizontal lines connecting the working tooth composed of a right triangle, the angle of the right triangle where the tooth tip is 78 °, tooth bottom where the angle of 12 °, the working teeth and the tooth bottom connecting the top edge of work, with a toothed working edge exponential curve, exponential curve tooth profile design and the sleeve is fixed in that the walking beam beam tooth when working up scrolling distance less than the length of the working side of the rolling side, the sleeve can not be caused to stay in the bottom of the tooth, more uniform heating and to avoid the outer diameter deformation differences in the organization, improved product quality.