我们用回火后局部冷却的方式校直弯曲的轴类零件，取得了令人满意的效果。现介绍如下 (参见附图 )： 　　先在距弯曲的轴类零件两端各四分之一处用铁丝拧做吊挂用的吊扣。使吊挂时，弯曲的轴类零件凸面朝下。待将其回火加热后，挂吊扣将轴类零件浸入水中至轴心线处，凹面的一半 We use the local cooling after tempering the bending of the shaft parts, and achieved satisfactory results. Now introduced as follows (see attached): first at the ends of the shaft from the bending of each quarter of the wire with a screw hanging hanging buckle. To hang, the curved shaft parts face down. After it is tempered and heated, the hanging buckle will submerge the shaft parts into the water to the center line, and the concave half