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All Journal JURNAL SIMETRIK Turbo : Jurnal Program Studi Teknik Mesin INOVTEK POLBENG Abdimas Dewantara Journal of Applied Engineering and Technological Science (JAETS) JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) INJECTION: Indonesian Journal of Vocational Mechanical Engineering Politeknosain
Asep Ruchiyat
Perawatan Dan Perbaikan Mesin, Politeknik Negeri Ketapang
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences

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Journal : INOVTEK POLBENG

 1 
KAJIAN PEMANFAATAN TANDAN KOSONG KELAPA SAWIT (TANKOS) SEBAGAI KATALIS BASA PADA REAKSI TRANSESTERIFIKASI METIL ESTER Asep Ruchiyat
INOVTEK POLBENG Vol 8, No 1 (2018): INOVTEK VOL.8 NO 1 - 2018
Publisher : POLITEKNIK NEGERI BENGKALIS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (167.305 KB) | DOI: 10.35314/ip.v8i1.269

Abstract

The energy and fuel crisis has occurred since the late1970s. Therefore, in the early 1980, it was assumed that the fuel reserves of the non-renewable sources (petroleum-based fuels) could possibly run out and new alternative sources should be found out. Biodiesel is one alternative renewable and biodegradable energy source that is more eco-friendly compared to petroleum diesel. Statistically, based on the Anava test, the result is 5%. It is proved that the addition of concentrated ash from palm oil waste and the temperature of transesterification reaction significantly effects kinematic viscosity at 25 °C (cp), acid number (mg/gr), and sedimentary water content (%). Meanwhile, mass parameter (gr/cm3) statistically has no significant effect. The quality of methyl esters that is produces especially the parameter of acid has fulfilled the standard quality requirement of biodiesel according to SNI-04-7182-2006 althoughwater content parameter, viscosity or mass has not fulfilled SNI quality standard.
PENGARUH PENDINGINAN MEDIA AIR DAN OLI PADA HEATTREATMENT SAMBUNGAN LAS METODE SMAW TERHADAP KEKUATAN LOGAM YANG DIHASILKAN Asep AR Ruchiyat
INOVTEK POLBENG Vol 8, No 2 (2018): INOVTEK VOL.8 NO 2 - 2018
Publisher : POLITEKNIK NEGERI BENGKALIS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (191.823 KB) | DOI: 10.35314/ip.v8i2.732

Abstract

Abstract Welding is a method of metal extension that utilize the Penetration of heat produced. Heat and the freeze of a metal extension is a natural phenomenon, where that process works based on the difference of temperature. The cooling temperature that work so fast creating diverse structure as the result that the mechanical ability of a metal changes.                This research purpose is to find out to what extent heat treatment with water and oil cooling media gives effect to the result of SMAW weld, considering processes changes in metal are very sensitive towards mechanical ability.                 Hardness testing in raw material that has been done gives result of 46.9 with an average hardness in the normal welding process of 48 HRB or increased by 2.34%. This value indicates that the welding process will have an impact on the increase in hardness of the weld metal. Then the weld metal heat treatment process at 850oCwith normal cooling of free air decreases the weld metal hardness by 43.5 HRB or 7.24% under raw material. While the quenching process carried out with water and oil cooler has an impact on increasing the hardness above heat treatment, normal cooling is 4.36% and 3.19% lower to the raw material. From this description it can be concluded that quench accelerates the rate of cooling and increase hardness by 4.36%. Key words: welding SMAW, heattreatment, cooling water and oil, hardness metal   
Co-Authors Helanianto Irwan Susilo Muh Anhar Polonia, Betti Ses Eka Yusuf Yusuf Yusuf