液压油缸等离子弧表面淬火工艺

Plasma arc surface quenching process for hydraulic cylinders

液压油缸作为液压机的液压执行元件,通过往复运动,输出压力和速度。因此其柱塞杆、活塞杆既要具备表面高硬度、耐磨性和疲劳极限,还要求心部具备高强度、韧性和塑性。为了满足柱塞杆、活塞杆技术性能要求,需对其外圆表面进行淬火处理。为此,改变常规采用的感应加热表面淬火工艺,率先采用等离子弧表面淬火工艺,在卧式车床上对大直径油缸柱塞杆、活塞杆进行表面淬火,取得了满意的效果。

As the hydraulic actuator of the hydraulic press,the hydraulic cylinder outputs pressure and speed through reciprocating motion.Therefore,the plunger rod and piston rod should not only have high surface hardness,wear resistance and fatigue limit,but also require the core to have high strength,toughness and plasticity.In order to meet the technical performance requirements of plunger rod and piston rod,the outer surface of the plunger rod needs to be quenched.To this end,the conventional induction heating surface quenching process was changed,and the plasma arc surface quenching process was first adopted,and the large-diameter cylinder plunger rod and piston rod were surface quenched on the horizontal lathe,and satisfactory results were obtained.