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一、前言齿轮是现代化机械工业中的重要传动零件,其主要作用是传递扭矩和变换速度。大模数重载齿轮经常处在较高的载荷下工作,因此要求齿轮表面必须具有高的硬度和耐磨性,同时齿轮还应具有高的接触疲劳强度和高的弯曲疲劳强度,心部还要有足够的强度和韧性。为了满足上述要求,对大模数重载齿轮都采用合金钢来制造,并对齿面进行硬化处理。硬齿面能有效地提高齿轮的承载能力和耐磨性,且其接触强度远远高于软齿面。感应加热表面淬火获
I. Introduction Gear is an important transmission part in modern machinery industry. Its main function is to transmit torque and change speed. Large-modulus heavy-duty gear often work at higher loads, so the gear surface must have high hardness and wear resistance, while the gear should also have high contact fatigue strength and high bending fatigue strength, the heart also Have enough strength and toughness. In order to meet the above requirements, large modulus heavy-duty gears are made of alloy steel, and the tooth surface is hardened. Hardened tooth surface can effectively improve the bearing capacity and wear resistance, and its contact strength is much higher than the soft tooth surface. Induction heating surface hardening by