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<![CDATA[NILAI KEKERASAN PASCA QUENCHING MEDIA CLAY PADA LAPISAN LAS DI ATAS MILD STEEL ]]>
<![CDATA[Sopiyan]]>;
<![CDATA[Syamsuir]]>
<![CDATA[ Jurnal Konversi Energi dan Manufaktur Vol. 6 No. 1 (2019) ]]>
Publisher : <![CDATA[Universitas Negeri Jakarta ]]>
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DOI: 10.21009/JKEM.6.1.2
<![CDATA[Proses hardfacing menggunakan jenis SMAW, dengan polaritas DC+, arus yang digunakan 130A, elektroda HV 350. Setelah spesimen di las (satu lapis), kemudian langsung dicelup ke dalam air. Setelah mendingin, spesimen grinding, amplas kemudian dilakukan heat treatment 1000oC holding time 10 menit dan quenching dengan media clay. Spesimen yang telah di quenching sebelumnya dipoles dan etsa dengan nital lalu dilakukan pengujian kekerasan dan mikrostruktrur. Nilai kekerasan yang didapatkan dari sebelum dan sesudah quenching dengan media clay adalah sebesar 250 dan 296,93 HV.]]>
<![CDATA[EFEK PENGADUKAN SAAT PELAPISAN TEMBAGA PADA ALUMUNIUM TERHADAP LAJU KOROSI ]]>
<![CDATA[Syamsuir]]>;
<![CDATA[Hamzah Fajar]]>;
<![CDATA[Kurniawan Widodo]]>;
<![CDATA[Sopiyan]]>
<![CDATA[ Jurnal Konversi Energi dan Manufaktur Vol. 6 No. 1 (2019) ]]>
Publisher : <![CDATA[Universitas Negeri Jakarta ]]>
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DOI: 10.21009/JKEM.6.1.8
<![CDATA[Penggunaan alumunium yang dilapis tembaga akan lebih ekonomis jika dibandingkan dengan pengunaan tembaga pejal. Saat ini penggunaan tembaga dalam dunia medis banyak dibutuhkan,karena dapat berfungsi sebagai anti bakteri (oligodinamik). Dalam penelitian ini akan dilakukan proses elektroplating dengan pelapis tembaga di atas substrat alumunium. Pada proses elektroplating tersebut akan ditambahkan juga proses pengadukan sebesar 300 rpm. Hal ini dilakukan agar distribusi ion merata. Pada proses elektroplating tembaga menggunakan kuat arus 20 mA,voltase 1,2 V selama 30 menit dengan komposisi larutan CuSO4 220gr/L dan H2SO4 20ml/L. Bedasarkan hasil uji korosi yang di dapat dengan diaduk maka laju korosinya meningkat. Laju korosi terendah pada substrat yang telah di lapisi dengan tembaga tanpa pengadukan. Terlihat pergeseran potensial korosi (Ekorosi) sekitar ±0,4V ketika dilapisi dengan tembaga, baik dengan pengadukan maupun tidak. Permukaan lapisan tembaga terlihat lebih seragam ketika dilakukan pengadukan saat proses elektroplating.]]>
<![CDATA[KEKERASAN DAN KETAHANAN KOROSI LAPISAN KERAS DI ATAS PERMUKAAN BAJA KARBON ]]>
<![CDATA[Yunita Sari]]>;
<![CDATA[Akmal Nashrullah]]>;
<![CDATA[Sopiyan]]>
<![CDATA[ Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022) ]]>
Publisher : <![CDATA[Universitas Negeri Jakarta ]]>
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DOI: 10.21009/JKEM.7.1.1
<![CDATA[Low carbon steel is widely applied to make heavy equipment, such as bucket excavators because it has a combination of material properties such as strength, ductility, corrosion resistance, and good formability. The use of this excavator bucket requires high strength and high corrosion resistance. Because the excavator bucket always rubs against the ground, it is necessary to do hard facing to increase the hardness of this excavator bucket. This research examines the effect of coating and heat treatment on low carbon steel to increase hardness and corrosion resistance. The plating process uses manganese alloy steel and chrome alloy steel, then heat-treated to a temperature of 1000°C and holding time for 10 minutes, then cooled using water media. From the test results, it was found that coating using chrome alloy steel has higher hardness and corrosion resistance than coating using manganese alloy steel because chrome is harder and corrosion-resistant than manganese.]]>
<![CDATA[Efek Variasi Campuran Solvent-Varnish dan Suhu Pengeringan terhadap Karakteristik Pelapis ]]>
<![CDATA[Sopiyan]]>;
<![CDATA[Muhammad Iqbal]]>;
<![CDATA[Ferry Budhi Susetyo]]>
<![CDATA[ Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi Volume 4 Nomor 1 Tahun 2022 ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Pancasila ]]>
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DOI: 10.35814/asiimetrik.v4i1.2450
<![CDATA[Painting is a process to make a thin layer of paint over an object. Factors to beautify the results of painting on the vehicle body are given a layer of varnish. To produce a quality varnish coating, it is necessary to pay attention to the ratio between the varnish-solvent used and the drying method used. This study aims to determine the mixture of varnish - solvent (1:0,1 and 1:0,2) with a drying temperature method of 40°C, 60°C, and 80°C on gloss, thickness, and adhesion to the motor vehicle body. The lower the oven temperature, the higher the gloss and the thicker the coating. The best adhesion at the oven temperature of 40ºC and 60ºC on all varnish-solvent compositions. The higher of the solvent mixture would result glossier and less thickness of the layer form.]]>
<![CDATA[EFEK PENGGUNAAN DOUBLE DAN SINGLE PISTON CALIPER TERHADAP WAKTU DAN JARAK TEMPUH PADA PENGEREMAN SEPEDA MOTOR 125 CC ]]>
<![CDATA[Sopiyan]]>;
<![CDATA[Darwin Rio Budi Syaka]]>;
<![CDATA[Muhammad Rafif Iqbal]]>
<![CDATA[ Jurnal Konversi Energi dan Manufaktur Vol. 8 No. 1 (2023) ]]>
Publisher : <![CDATA[Universitas Negeri Jakarta ]]>
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DOI: 10.21009/JKEM.8.1.3
<![CDATA[This study aims to determine the distance and braking time on 125cc motorcycle vehicles by using two types of callipers, namely single-piston and double-piston callipers. The research method uses experimental methods. There this method will compare 2 variables to get the results of the study by sulking on SNI Braking. By varying the two callipers of different types and using the brake pressure gauge, stopwatch, and meter to find out the pressure, time, and distance when conducting the test, the results of the test are calculated by the formula of regularly changing straight motion force (GLBB) slowed down, braking force and braking efficiency formula in order to get more valid results. Based on the results of this research report, it was concluded that the 2-piston callipers are superior to the 1-piston callipers in terms of average mileage of 0.51 m (9.81 m – 9.30 m) in front wheel braking and average mileage of 0.42 m (4.63 m – 4.21 m) in rear wheel braking and average stopping time of 0.21 s (2.51 s – 2.30 s) with the average effect of braking efficiency value of 5% (57% - 52 %) on front wheel braking and the average time for 0.21 s (1.58 s – 1.37 s) with the average effect of efficiency value of 5 % (47 % - 42 %) on rear wheel braking. So that makes 2-piston callipers better used in 125 cc vehicles than 1-piston callipers in terms of braking aspects.]]>
<![CDATA[Pengaruh Variasi Temperatur Pengeringan Terhadap Daya Kilap Cat Pada Komponen Kendaraan Bermotor: Effect of Variation in Drying Temperature on Paint Glossy on Motor Vehicle Components ]]>
<![CDATA[Sopiyan]]>;
<![CDATA[Muhammad Iqbal]]>;
<![CDATA[Ferry Budhi Susetyo]]>
<![CDATA[ METALIK : Jurnal Manufaktur, Energi, Material Teknik Vol. 1 No. 1 (2022): Metalik: Jurnal Manufaktur, Energi, Material Teknik ]]>
Publisher : <![CDATA[Universitas Muhammadiyah PROF. DR. HAMKA Fakultas Teknik – Program Studi Teknik Mesin ]]>
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DOI: 10.22236/metalik.v1i1.8462
<![CDATA[Varies drying temperature will be carried out to see the characteristics formed such as gloss, bending ability, and adhesion resistance. The SPCC plate was cut and then carried out an epoxy painting process and dried. Then proceed with painting by giving black color and drying. Then proceed with the provision of varnish with a composition of 1:0.3 varnish and solvent. After completion, it is then baked in an oven with temperature variations of 40, 60, and 80ËšC for 25 minutes. The temperature of 40ËšC produces the highest gloss, which is 98.9 GU, good adhesion because there is no peeling paint and good bending results because there are no cracks.]]>
<![CDATA[Different Quenching Media Effect on Microstructure, Hardness,and Corrosion of Medium Carbon Steel ]]>
<![CDATA[Syaripuddin]]>;
<![CDATA[Sopiyan]]>;
<![CDATA[Syamsuir]]>;
<![CDATA[Tegar Firman Pamungkas]]>;
<![CDATA[Ahmad Lubi]]>;
<![CDATA[Ferry Budhi Susetyo]]>
<![CDATA[ Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 7 Number 2 (2025) ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Pancasila ]]>
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DOI: 10.35814/asiimetrik.v7i2.8793
<![CDATA[Medium carbon steel is widely used due to could conduct heat treatment to modify the microstructure and mechanical properties. Quenching is one method to modify the microstructure and mechanical properties. In the present study conducted heating samples at 850°C using an electric furnace, then held them for 60 minutes and quenched in various media (saline water, oil, and distilled water). Afterward, the quenched sample was investigatedmicrostructure, hardness, and corrosion using an optical microscope, Vickers hardness tester, and weight loss method. 5% NaCl quenching media could result in samples more uniform and martensite due to the high cooling rate.More uniforms and martensite have the beneficial highest hardness and lowest corrosion rate for around 762.4 HV and 76.04 mpy.]]>
<![CDATA[Efek Variasi Campuran Solvent-Varnish dan Suhu Pengeringan terhadap Karakteristik Pelapis ]]>
<![CDATA[Sopiyan]]>;
<![CDATA[Muhammad Iqbal]]>;
<![CDATA[Ferry Budhi Susetyo]]>
<![CDATA[ Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 4 Nomor 1 Tahun 2022 ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Pancasila ]]>
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DOI: 10.35814/asiimetrik.v4i1.2450
<![CDATA[Painting is a process to make a thin layer of paint over an object. Factors to beautify the results of painting on the vehicle body are given a layer of varnish. To produce a quality varnish coating, it is necessary to pay attention to the ratio between the varnish-solvent used and the drying method used. This study aims to determine the mixture of varnish - solvent (1:0,1 and 1:0,2) with a drying temperature method of 40°C, 60°C, and 80°C on gloss, thickness, and adhesion to the motor vehicle body. The lower the oven temperature, the higher the gloss and the thicker the coating. The best adhesion at the oven temperature of 40ºC and 60ºC on all varnish-solvent compositions. The higher of the solvent mixture would result glossier and less thickness of the layer form.]]>
<![CDATA[Current Variation Effect on Hardness and Corrosion Resistance of Formed Weld Layer ]]>
<![CDATA[Syaripuddin]]>;
<![CDATA[Sopiyan]]>;
<![CDATA[Ahmad Nur Hisyam]]>
<![CDATA[ Jurnal Konversi Energi dan Manufaktur Vol. 11 No. 1 (2026) ]]>
Publisher : <![CDATA[Universitas Negeri Jakarta ]]>
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DOI: 10.21009/JKEM.11.1.4
<![CDATA[Hardfacing over carbon steel was carried out using the SMAW apparatus. The sample was hard-faced with a single layer using HV 800 electrode with a 1G weld position. Different welding currents were used, such as 90, 100, and 110 A. After the weld, the sample was quickly immersed in distilled water. Cooled samples were cleaned with a chipping hammer and a wire brush. Afterwards, the samples were cut for hardness and corrosion testing. The highest hardness in the sample was welded using 110A, while the lowest hardness was welded using 90A. Increasing the current from 90 to 110 A could increase hardness by approximately 2.31%. The lowest current was used during welding, resulting in a lower corrosion rate. This means that the welding layer produced at the lowest current has greater corrosion resistance than that produced at higher currents. Reducing the current from 110 to 90 A could reduce the corrosion rate by approximately 44.33%. Finally, all three specimens meet the "good" criteria of corrosion resistance. ]]>
<![CDATA[Effect of NaCl Concentration in Quenching Medium on Microstructure, Hardness, and Corrosion Behavior of AISI 4140 Steel ]]>
<![CDATA[Syaripuddin]]>;
<![CDATA[Sopiyan]]>;
<![CDATA[Rany Anggraini]]>;
<![CDATA[Adi Tri Tyassmadi]]>;
<![CDATA[Silalahi Jose Jan Filder]]>;
<![CDATA[Muhammad Dhafa Irziansyah]]>;
<![CDATA[Syamsuir]]>;
<![CDATA[Ahmad Lubi]]>;
<![CDATA[Muhammad Fatihuddin]]>;
<![CDATA[Reza Febriano Armas]]>;
<![CDATA[Ferry Budhi Susetyo]]>
<![CDATA[ Jurnal ASIIMETRIK Jurnal Ilmiah Rekayasa & Inovasi Volume 8 Number 2 (2026) ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Pancasila ]]>
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DOI: 10.35814/asiimetrik.v8i2.9970
<![CDATA[AISI 4140 steel is widely used in engineering and marine components due to its high strength and good hardenability. However, improving hardness through heat treatment may influence the corrosion behavior of the material in chloride containing environments. This study investigates the effect of NaCl concentration as a quenching medium on the microstructure, hardness, and corrosion behavior of AISI 4140 steel. The samples were austenitized at 1000 °C for 15 minutes and quenched in NaCl solutions with concentrations of 3.5%, 7%, and 10.5%. Microstructural observations were carried out using optical microscopy after etching with 3% Nital. Hardness testing was performed using the Vickers method with a 10 kg load, while corrosion behavior was evaluated using weight loss measurements and electrochemical tests in 3.5% NaCl solution. The results show that increasing NaCl concentration produces a finer martensitic structure and increases hardness from 673 VHN at 3.5% NaCl to 762 VHN at 10.5% NaCl. However, the corrosion rate also increases from 0.3688 mmpy to 0.3990 mmpy, indicating higher electrochemical activity at the material surface. These results demonstrate a trade-off between improved hardness and reduced corrosion resistance with increasing NaCl concentration.]]>
