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我厂生产一批导套工件,材料为35CrMo,形状尺寸见图。技术要求为HRC36～42,热处理变形<0.30毫米。热处理工艺为预热—860℃加热保温—油淬+回火处理。按此常规工艺,工件淬火后弯曲变形大,一般为0.50～0.60毫米,最大的达到1毫米。由于工件长度短,直径较大,形状较复杂,淬火变形后,较难校直。因此解决淬火后的弯曲变形是关键问题。我们分析和试验了工件的变形规律。由于工件上有一条纵向
I plant a number of sets of guide sleeve workpiece, material 35CrMo, shape and size shown in the figure. Technical requirements for the HRC36 ~ 42, heat treatment deformation <0.30 mm. Heat treatment process for preheating -860 ℃ heat insulation - oil quenching + tempering. According to this conventional technology, the workpiece after bending bending deformation, generally 0.50 ~ 0.60 mm, the largest reached 1 mm. Due to the length of the workpiece is short, larger diameter, complex shape, hardened after deformation, more difficult to straighten. Therefore, to solve the bending deformation after quenching is the key issue. We analyze and test the deformation of the workpiece. Because of the workpiece has a vertical