CRAWLER TRACK LINK AND METHOD FOR MANUFACTURING THE SAME

摘要

Desired hardness distribution is attained for each portion of a crawler track link through a small number of steps. The method for manufacturing the crawler track link comprises a step for forming a crawler track link (3) having a tread portion (13), a crawler tracked fixing face portion (14) at a position opposing the tread portion (13), and a window (18) in the side face by hot forging, and a step for cooling the tread portion (13) at a first cooling rate, cooling the crawler track fixing face portion (14) and the corner portion of the window (18) on the crawler track fixing face portion side at a second cooling rate lower than the first cooling rate, and a step for cooling the remaining portions of the crawler track link (3) excluding the tread portion, the crawler track fixing face portion and the corner portion at a third cooling rate lower than the second cooling rate, wherein the first cooling rate is the cooling rate at which the tread portion (13) is quenched.