GRADER BLADE WITH TRI-GRADE INSERT ASSEMBLY ON THE LEADING EDGE

摘要

A grader blade (10) includes a grader blade body (11) that has a recess (26) in a bottom edge, and a tri-grade insert assembly (50) is received within the recess (26). The tri-grade insert assembly (50) includes a leading insert (52) , a mediate insert (54) and a trailing insert (56). The leading insert (52) has an impact wear resistance and fracture wear resistance greater than the mediate insert (54) and the trailing insert (56). The trailing insert (56) has an abrasion wear resistance and down-pressure wear resistance greater than the leading insert (52) and the mediate insert (54). The mediate insert (54) has an impact wear resistance and fracture wear resistance greater than the trailing insert (56) and an abrasion wear resistance and down-pressure wear resistance greater than the leading insert (52).