引言旋耕刀是旋耕机的主要零件,它通过旋转和前进运动,直接担负着对未犁耕或已犁耕过的田地进行耕、耙作业,是重要的易损件。旋耕刀的要求是强度高、韧性好,即不但耐磨损,而且当碰着砖头、石块等时一般不致折断和弯曲。所以,在选定合适材质的同时,必须选择最佳的热处理工艺,从而得到最合理的机械性能及其相应 INTRODUCTION Rotary blade is the main part of rotary tiller, it is through the rotation and forward movement, is directly responsible for not plowing or plowed fields for farming, raking operations, is an important wearing parts. Rotary knife requirements are high strength, good toughness, that is not only resistant to wear and tear, but also when touching bricks, stones, etc. generally not break and bend. Therefore, in the selection of the right material at the same time, we must choose the best heat treatment process, resulting in the most reasonable mechanical properties and their corresponding