Effective Measures for Preventing Grinding Cracks of 20CrMnMo Carburized Gear Shaft
In recent years, our company has produced a large number of hard-toothed composite reducers for metallurgical systems. The material of high-speed gear shafts is made of carburized steel 20CrMnMo. The tooth surface machining accuracy of a gear in the base (m=16 axis, number of teeth is Z=20) is required to be 7 or more, so grinding is required. The tooth surface often produces grinding teeth cracks during the grinding process. Since the existence of grinding cracks reduces the mechanical properties of the product, it is easy to produce pitting or even peeling off in the later working engagement. Therefore, the gear shaft can only be scrapped when the grinding crack is more, and the lighter one is barely used. , but the service life is shortened.