本文从实际观察和分析得出,接触疲劳磨损是刃口的主要磨损形式,在有较多硬杂质。情况下,还有冲击造成的崩刃和卷刃,在切割副之间还可能有粘着磨损,只有当刃口切入作物后,刃面才受磨粒磨损,造成划伤。提高刃口的疲劳强度和韧性,使前沿不被突破,是比单纯提高硬度以减轻刃面划伤更为积极的措施。 文章介绍了获得树根状碳化物和消除刃口碳化物疵病以提高刀刃寿命的两种热处理工艺。 This article from the actual observation and analysis that the contact fatigue wear is the main form of wear on the edge, with more hard impurities. In the case, there are also chipping and curling caused by the impact. There may be adhesive wear between the cutting pairs. Only when the cutting edge is cut into the crop, the blade face will be worn by the abrasive particles and cause scratches. Increasing the fatigue strength and toughness of the cutting edge, so that the front will not be a breakthrough, is more than simply increase the hardness to reduce the blade face more positive measures. This article describes two heat treatment processes for obtaining rooted carbide and for eliminating edge galling to improve blade life.