Pengaruh Jarak Burner Terhadap Kekerasan Dan Struktur Mikro Dengan Proses Flame Hardening Pada Komponen Sprocket Sepeda Motor

Mulyandono, Hari (2006) Pengaruh Jarak Burner Terhadap Kekerasan Dan Struktur Mikro Dengan Proses Flame Hardening Pada Komponen Sprocket Sepeda Motor. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sprocket imitasi sepeda motor identik dengan harga murah, kualitas rendah sebab kekerasan material sproket rendah. Padahal ada banyak cara untuk meningkatkan kekerasan, salah satunya proses Flame Hardening. Oleh sebab ito perlu dilakukan proses Flame Hardening kususnya di permukaan sproket. Proses flame hardening dilakukan pada spesimen sprocket sepeda motor yang mempunyai kandungan karbon 0,4%. Proses Flame Hardening dilakukan tiga taraf jarak yang berbeda diukur dari ujung nyala api netral flame hingga benda kerja yaitu 9mm, 5mm, 2mm. Proses Flame Hardening menggunakan las oxy-acetylene dengan media pendingin oil, setelah proses flame selesai, dilakukan uji kekerasan dan uji metallography. Uji kekerasan dengan menggunakan jenis mesin rockwell HR 150 A. Hasil uji tersebut diana1isa untuk dibandingkan dengan sprocket yang original. Hasil penelitian menunjukan bahwa dengan variabel pengaruh jarak dapat diketahui dengan kekerasan sebelum flame 72,6 HRB dan sesudah flame dengan jarak 9mm = 81,875 HRB, 5mm = 83,525 HRB dan 2mm = 83,775 HRB. serta dapat diambil data hasil uji sprocket yang original dengan kekerasan rata-rata 40,125 HRC.Kekerasan maksimal pada proses Flame Hardening terjadi pada jarak 2mm sebesar 83,775 HRB, jika di bandingkan kekerasanya dengan sprocket original yang besarnya 40, 125 HRC, maka sprocket yang original masih lebih keras dari pada yang imitasi
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Imitation motorcycle sprockets are synonymous with low prices and low quality due to the low hardness of the sprocket material. However, there are many ways to increase hardness, one of which is the Flame Hardening process. Therefore, it is necessary to carry out the Flame Hardening process specifically on the surface of the sprocket. The flame hardening process is carried out on motorcycle sprocket specimens that have a carbon content of 0.4%. The Flame Hardening process is carried out at three different distance levels measured from the tip of the neutral flame to the workpiece, namely 9mm, 5mm, and 2mm. The Flame Hardening process uses oxy-acetylene welding with oil as the cooling medium. After the flame process is complete, hardness and metallography tests are carried out. The hardness test uses a Rockwell HR 150 A machine. The test results are analyzed to compare with the original sprocket. The results of the study show that the influence of the distance variable can be known with the hardness before the flame 72.6 HRB and after the flame with a distance of 9mm = 81.875 HRB, 5mm = 83.525 HRB and 2mm = 83.775 HRB. and can be taken data from the original sprocket test results with an average hardness of 40.125 HRC. The maximum hardness in the Flame Hardening process occurs at a distance of 2mm of 83.775 HRB, if compared to the hardness with the original sprocket which is 40.125 HRC, then the original sprocket is still harder than the imitation one

Item Type:	Thesis (Diploma)
Additional Information:	RSM 671.36 Mul p-1 2006 (weeding)
Uncontrolled Keywords:	Sprocket, burner, hardening, flame
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN690 Metallography. Physical metallurgy T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21401-(D3) Diploma 3
Depositing User:	EKO BUDI RAHARJO
Date Deposited:	03 Nov 2025 08:39
Last Modified:	03 Nov 2025 08:39
URI:	http://repository.its.ac.id/id/eprint/128721

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