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弹簧卡是我厂主要产品820PZ话机手柄中的关键零件,结构如图1所示,其主要作用是卡住手柄中的送、受话器,在工作过程中承受较大的弹性变形,因而要求有良好的弹性和较高的疲劳极限。弹簧卡选用0.8mm厚的65Mn弹簧钢板制造,供货状态硬度HB≤302。要求热处理后硬度HRC43～48,无氧化和明显变形。我们原来采用如图2所示的淬火、回火工艺。淬火在RYD-45-9炉中加热,每炉5
Spring Card is the key part of our main products 820PZ phone handle. The structure is shown in Figure 1. The main function of the spring card is to get stuck in the handle and send and receive the phone. It is subject to great elastic deformation during the work, The flexibility and high fatigue limit. Spring card selection 0.8mm thick 65Mn spring steel manufacturing, supply status hardness HB ≤ 302. After the heat treatment required hardness HRC43 ~ 48, no oxidation and significant deformation. We originally used as shown in Figure 2 quenching and tempering process. Quenching RYD-45-9 furnace heating, 5 per furnace