A method of making a self-sharpening metallic cutting blade or a cultivator swep and a cutting blade or a cultivator sweep

摘要

A method of making a self-sharpening cutting blade (1) from a blank comprises the steps of: identifying a leading edge (12), designating a targeted portion (34) of the rear surface (14), and quickly heating the targeted portion including the leading edge (12). In addition, a cutting blade (1) has selectively hardened surfaces, allowing the blade to maintain its sharpness by promoting deterioration of underlying material (36) rather than of the leading edge (12). <IMAGE>