| 摘要 |
PURPOSE: A piston for a hydraulic breaker is provided to reduce heat treatment time by treating a specific part of the piston where shock is applied using heat. CONSTITUTION: A piston (110) for a hydraulic breaker comprises oil pockets (112) and heat treatment sections (210). The oil pockets are formed on the outer surface of the piston. The heat treatment sections are formed on the top and bottom of the piston. A first heat treatment section (L1) of the heat treatment section is formed in a front end hitting part, and a second heat treatment section (L2) is formed in the opposite portion of the front end hitting part. The first heat treatment section is 130-200mm.
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