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汽车变速器齿轮是汽车传动中极其重要的零件。不仅要求齿面耐压、耐磨、较高接触疲劳强度和弯曲强度,而且对其形状、尺寸精度要求也很严格。原来用40Cr钢制造齿轮,是采用液体氰化,工效低、毒性大、变形量也大。在学习兄弟厂先进经验基础上,因陋就简,自行改装JT—75型井式气体渗碳炉,进行了中温气体碳氮共渗工艺试验。经过一段时间的
Automotive Transmission Gears are extremely important parts in automotive transmissions. Not only demanded tooth surface pressure, wear, high contact fatigue strength and bending strength, but also its shape, dimensional accuracy requirements are also very strict. The original gear with 40Cr steel, is the use of liquid cyanide, low efficiency, toxicity, deformation is also large. On the basis of learning the advanced experience of Brothers Factory, the JT-75 Pit-type Gas Carburizing Furnace was modified due to its simplicity, and the mid-temperature gas carbonitriding process test was carried out. After some time