Heat Treatment to Increase Hardness Value on the Blades of Green Bean Skin Peeling and Separating Tools with Different Holding Time Variations
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Abstract
This research aims to improve the hardness value of the blades used in peeling and separating green bean skins through heat treatment using variations in holding time and cooling media. The specimens used are low carbon steel with a thickness of 10 mm, subjected to heat treatment at a temperature of 800°C and followed by holding times of 15, 30, and 45 minutes. The cooling media used are water and oil. Hardness testing was conducted using the Rockwell method. The results show that holding time and the type of cooling media significantly affect the increase in steel hardness. The highest hardness value was obtained at a holding time of 45 minutes using oil as the cooling medium, which is 34.98 HRC. Thus, the heat treatment process is effective in enhancing the mechanical properties, particularly hardness, in low carbon steel for agricultural tool applications.
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