KW-4电铲推压齿轮如图1所示,模数24、齿数14,常使用ZG42MnMoV制造。其生产流程是:铸造——退火——调质——加工——中频骑齿表面淬火——低温回火。这样生产的推压齿轮,齿的淬硬层只有3～5mm,而且分布不均,节圆部分硬度较高,达HRC58左右,而齿根得不到强化,易造成齿牙根部断裂,在现场使用寿命一般只为35天左右。1983年初,经过研究,参考太原重型机 KW-4 shovel push gear shown in Figure 1, modulus 24, the number of teeth 14, often used ZG42MnMoV manufacturing. The production process is: Casting - Annealing - Quenching - Processing - IF Riding Surface Hardening - low temperature tempering. Such production of push gear, tooth hardened layer is only 3 ~ 5mm, and uneven distribution, round section of the higher hardness, up to about HRC58, while the root can not be strengthened, easily lead to tooth root fracture, on the scene The service life is only about 35 days. In early 1983, after research, reference Taiyuan heavy machine