机构运动零件动作简单,静载荷,受力稳定。图1是某电器开关中几个机构运动零件,材料A3,服役状态下受拉力或受弯矩作用,稍有冲击。为保证机构运动的动作瞬时准确,要求区域M(图中虚线框定部分)硬度高、抗磨,否则会因为塑性变形产生迟到和卡死而失败。图纸规定的热处理技术要求为局部渗碳淬火,渗层深度0.5～0.8mm,淬火回火硬度HRC 48～36,硬度均匀性±HRC1.5。为达到热处理技术要求,原生产工艺流程是:下料→冷冲成形→钳修形→镀铜 Mechanism movement parts simple, static load, force stability. Figure 1 is a mechanical switch several agencies moving parts, materials A3, the state of service under tension or bending moment, a slight impact. In order to ensure the momentary and accurate movement of the mechanism, it is required that the area M (the part enclosed by the dotted line in the figure) has high hardness and wear resistance, otherwise it will fail to be late and stuck because of plastic deformation. Drawing requirements of the heat treatment for local carburizing and quenching, infiltration depth 0.5 ~ 0.8mm, quenching and tempering hardness HRC 48 ~ 36, hardness uniformity ± HRC1.5. To meet the technical requirements of heat treatment, the original production process is: blanking → cold forming → pincer repair → copper plating