KAJIAN EKSPERIMENTAL PENGARUH LAMA WAKTU TEMPERING PADA PERLAKUAN PANAS TERHADAP SIFAT KEKERASAN KOMPONEN POROS BELAKANG SEPEDA MOTOR
Keywords:Heat treatment, tempering time, motorcycle rear axle and Rockwell B Hardness.
AbstractThe purpose of this study was to determine the length of tempering time which significantly affected the value of hardness of the rear axle of a motorcycle. So if it is known the level of comparison of the magnitude of the value of violence and its suitability for its usefulness, it can be used as a valid reference for using the right length of time. The methodology used in this study was to carry out Rockwell hardness test experiments on Rear Wheel Axle Motorcycles at a temperature of 850oC heat treatment with a difference in the length of time tempering at 60 minutes, 90 minutes and 120 minutes. The results of the hardness test after heat treatment were compared comparatively to the specimens which were not subjected to heat treatment. The results showed that the rear axle specimens of the motor heat treated had a hardness value of 25.66 HRB (120 minutes tempering time) at the base of the shaft position, a hardness value of 25.80 HRB (tempering time of 90 minutes) at the center shaft position, and value hardness of 25.60 HRB (tempering time of 60 minutes) at the position of the shaft end. Whereas the rear axle specimen of the motorbike which is not heat treated has a hardness value of 21.76 HRB at the shaft base position and 22.06 HRB at the center shaft position and 21.39 HRB at the end of the shaft position.
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