Modification of Grass Chopper Blade from Leaf Spring with Coconut Shell Charcoal Addition by Carburizing Treatment
DOI:
https://doi.org/10.32493/pjte.v7i2.34439Keywords:
JIS-SUP 9 steel, carburizing, blade, leaf spring, chopperAbstract
A grass chopper is a machine used to chop grass and soft stems. In the grass chopping process, a sharp blade is required. The current problem is the blade get wear due to repeated sharpening of the blade, resulting in a non-uniform texture of chopped grass and often found some large grass sizes. Therefore, this research focuses on blade material engineering. This research was conducted by carburizing at 700°C for 60 minutes and adding carbon from coconut shell charcoal followed by quenching using water cooling media. The blade was made from a leaf spring made of JIS-SUP 9 steel. The results showed 106% of enhancement in carbon composition after the blade was treated by carburizing. This carbon composition enhancement affects the performance of the blade, namely higher hardness as shown by a 175% increase in hardness value and a 96.4% lower wear rate than the untreated blade.
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