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Niharman Niharman
Universitas Prof. Dr. Hazairin, SH
Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Pengujian Kekerasan Plat Bodi Lori Batubara Dengan Suhu 400C di Quenching Dengan Air Garam Niharman Niharman; Antonius F A Silaen
MAJALAH TEKNIK SIMES Vol 13 No 1 (2019): Majalah Teknik Simes
Publisher : UNIVERSITAS PROF. DR. HAZAIRIN, SH BENGKULU

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Abstract

Abstract The heat treatment process in metals is very useful for obtaining quality metals and having physical properties including better electrical conductivity, microstructure, density and mechanical properties, especially in terms of hardness, elasticity and workmanship of the nature of origin. This process is carried out at a temperature of 4000C for 15 minutes then cooled with a water cooling medium mixed with 200 grams of salt, 400 grams, 600 grams, 800 and 1000 grams. Test results with the value of hardness average results without treatment = 65.2, quenching water mixed with salt 200 grams = 57.8, quenching water mixed with salt 400 grams = 57.36, quenching water mixed with salt 600 grams = 76.48, quenching water mixed with salt 800 grams = 77, quenching water mixed with salt 1000 grams = 58, 42. Specimens that were subjected to heat treatment and quenched with water mixed with 600 grams and 800 grams had an increased hardness value compared to the specimen without receiving treatment, while specimens that received heat treatment of 400ºC with quenching water mixed with 200 grams of salt, 400 grams and 1000 grams had decreased hardness compared to specimens without getting different treatment. Based on the above test it can be concluded that the right amount of salt mixed with water can increase the dryness value in the specimen to be tested
Pengaruh Sudut Sudu Terhadap Pengarah Turbin Helikal Pada Pembangkit Tenaga Listrik Di Irigasi Bendungan Seluma Bengkulu Niharman niharman
MAJALAH TEKNIK SIMES Vol 12 No 2 (2018): Majalah Teknik Simes
Publisher : UNIVERSITAS PROF. DR. HAZAIRIN, SH BENGKULU

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The Gorlov certical axid water turbine is suitable ti hardness the water flow in the creation of kinetic energy for the irigation dam, the turbine tasted in this study was ther Gorlov helical turbine blade with steering angles of 0o, 30o, 45o, and 60o turbine diameter (d) 0f 0,30 m. height (h) 0f 0,50 m and the NACA 0020 profile. the testing was conducted on the irigation dam of seluma Bengkulu. The water flow showed in the velocity (Uair) of 0,85 m/s and a round (n) of 110 rpm. The results were archieved by setting the blades in the steering torque coefficient (CT) of 0.309 are turbine efficiency (nt) of 28.5% and a power turbine (PT) of 13.699 watts.
Co-Authors Antonius F A Silaen