HTM ›› 2020, Vol. 45 ›› Issue (3): 178-185.DOI: 10.13251/j.issn.0254-6051.2020.03.035

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Heat treatment technologies and its application of heavy duty gears

Fu Haifeng1, Li Qiao1, Xu Yueming1,2   

  1. 1. Beijing Research Institute of Mechanical and Electrical Technology Ltd., Beijing 100083, China;
    2. China Machinery Huanyu Certification and Inspection Ltd., Beijing 102609, China
  • Received:2019-09-17 Online:2020-03-25 Published:2020-04-03

Abstract:

Heavy duty gear refers to the gear with large transmission power, large load, low speed and large impact load. Therefore, it is required to have excellent wear resistance, high contact fatigue strength and bending fatigue strength, so it is necessary to modify its surface in order to improve its surface hardness and service life. The common surface modification methods of the heavy duty gears are carburizing heat treatment, nitriding heat treatment and induction quenching and tempering treatment. In this paper, the research status and progress of the above three kinds of heat treatment of the heavy duty gears are reviewed, and the application prospect of vacuum low pressure carburizing for heavy duty gears is also proposed.

Key words: heavy duty gear, carburizing quenching, nitriding, induction quenching, vacuum low pressure carburizing