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Umen Rumendi
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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PACK CARBURIZING PADA SPROCKET SEPEDA MOTOR DENGAN MATERIAL BAJA KARBON RENDAH Budi Hartono Setiamarga; Novi Kurniawati; Umen Rumendi
Mesin Vol. 21 No. 1 (2006)
Publisher : Mesin

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Abstract

High quality motorcycle sprocket with cheaper price has been achieved by giving additional processing to non original locally made sprocket such that it has an almost the same quality as the original Japanese made sprocket . The additional processing was pack carburizing which was done to the non-original sprocket, followed by quench hardening and tempering so that the quality of the non-original sprocket will be almost the same as the original sprocket. Pack carburizing was applied with active carbon as the carbon source and 10% BaCO3 as the energizer. This process was done at 950°C and one hour holding time. For heat treatment, the heating was done at 850°C for 15 minutes, followed by water quenching and tempering at 150°C for 30 minutes. The carburizing result indicated that there was a carbon penetration depth of about 1.05 mm. After tempering, an effective case depth of about 0.2 mm was achieved. The process variables for obtaining an effective case depth of original sprocket (0.2 mm) are selected by applying pack carburizing using active carbon granule with 10%wt BaCO3 as the carburizing medium, processed at 950°C for an hour, followed by water quenching from 850°C and tempering at 150°C for 30 minutes.
Analisa Pengaruh Jumlah Urea Dan Holding Time Proses Powder Nitriding Terhadap Ketahanan Aus Material FC 25 Umen Rumendi; Achmad Muhammad; Mohamad Gheo Wiriaputra
Jurnal Teknologi dan Rekayasa Manufaktur Vol 1 No 1 (2019): Vol 1 No 1 (2019): Volume: 1 | Nomor: 1 | April 2019
Publisher : Pusat Pengembangan, Penelitian dan Pengabdian kepada Masyarat (P4M) Politeknik Manufaktur Bandung (Polman Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1128.005 KB) | DOI: 10.48182/jtrm.v1i1.5

Abstract

The advantages of FC 25 cast iron over steel: low-cost material, good castability, better vibration resistance and machinability. Reduction in the function of an engine component is 70% due to wear and tear (55%) and corrosion (15%). The powder nitriding process can increase the wear resistance of FC 25 material by increasing surface hardness by diffusing nitrogen atoms to the surface of the specimen at a temperature of 500-590°C. The powder nitriding produces a white layer consisting of the compound γ (Fe4N) and ε - (Fe2-3N) and has a high hardness. The influential variables are degree of availability (d.o.a) urea, holding time and temperature. Six variable variations were carried out, namely d.o.a 0,1 & d.o.a 0,2, at each holding time of 1.5, 2.5 and 3.5 hours, at a constant temperature of 550°C. The higher d.o.a urea and the longer holding time of the powder nitriding process, the white layer will be thicker and the specimens are more resistant to wear, so that this nitriding powder successfully increases the wear resistance of FC 25 material.
Co-Authors Achmad Muhammad Budi Hartono Setiamarga Mohamad Gheo Wiriaputra Novi Kurniawati