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Nanulaita, Nevada. J.M
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Pengaruh Temperature Tempering Terhadap Kekerasan Pada Baja Karbon Sedang Hasil Pengelasan FCAW (Flux-Cored Arc Welding) Sekeroney, Clara; Nanulaita, Nevada. J.M; Dematacco, Frederick; Fikri, Mohammad Anas; Febriana, Ike Dayi
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2098

Abstract

Carbon steel is a type of alloy steel consisting of various elements, especially iron (Fe) and carbon (C). In general, the properties of steel are affected by the percentage of carbon and the microstructure of steel which is affected by steel composition and heat treatment. The welding process can change the structure and composition of steel. The safety of weld results can be carried out after welding using a heat treatment process. This tempering aims to obtain better and desired mechanical properties. Tempering is carried out using temperatures of 200⁰C, 250⁰C and 300⁰C with cooling using air media and mechanical testing will be carried out.The results of this research showed that tempering temperature had an effect on the hardness value of medium carbon steel resulting from FCAW welding. The hardness value at a temperature of 200℃ was 54.75, a temperature of 250℃ was 53.00 and a temperature of 300℃ was 52.04. The higher the temperature, the lower the hardness value and conversely, the lower the tempering temperature, the higher the hardness value.Keywords: Welding, Tempering, Hardness
Analisa Pengaruh Waktu Penahanan (Holding Time) Pada Proses Tempering Terhadap Sifat Mekanis Baja Karbon Menengah Hasil Pengelasan Fcaw (Flux Core Arc Welding) Padang, Rey Joy Toding; Nanulaita, Nevada. J.M; Talkua , Cley; Lopuhaa, Agustinus O.; Rohmah, Faizatur
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2099

Abstract

FCAW (Flux Core Arc Welding) welding is a type of welding process or joining metal materials that uses a heat source from electrical energy which is converted or converted into heat energy. a roll and uses gas as a protector for the weld metal which melts during the welding process. The content of medium carbon steel is 0.3%C - 0.6%C. This carbon steel has advantages compared to low carbon steel, medium carbon steel has stronger mechanical properties with a higher level of hardness than low carbon steel. . Before and after welding carbon steel materials, material testing will be carried out. With this test, it is hoped that the hardness and bending strength of the material will be known. The method used is a quantitative method including experimental research. With a plate thickness of 5mm, a variation of the V seam angle with an angle of 45° with a depth of 2.5mm. Using a stickout height of 5mm by varying the holding time, namely 30 minutes, 60 minutes, 90 minutes for FCAW welding  Keywords: Carbon steel, FCAW (Flux Core Arc Welding), Holding Time, Hardness Test, Bending Test
PENGARUH VARIASI SUDUT PENGELASAN KAMPUH V DAN KETINGGIAN ELEKTRIKAL STICK OUT PENGELASAN GMAW TERHADAP SIFAT MEKANIS BAJA ST-42 Demataco, Fredrik; Nanulaita, Nevada. J.M; Hadiwijaya, Lukman; Dewi, Ratna Ayu Pawestri Kusuma
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2120

Abstract

GMAW (Gas Metal Arc Welding), which is a solid or tubular welding electrode that is fed continuously mechanically from a roll of electrode wire inside the welding machine. The electrode is fed via a gun or torch by maintaining the height of the arc formed between the tip of the electrode wire and the material being welded or the base metal. GMAW (Gas Metal Arc Welding) is MAG (Metal Active Gas) and MIG (Metal Inert Gas) welding which is very efficient and fast in the process.Low carbon steel contains less than 0.3% carbon in the carbon steel mixture. Low carbon steel cannot be hardened because the carbon content is not enough to form a martensite structure. Welded joints are material or plate joints that are used for the welding process with the aim of getting maximum penetration from the joint.In this research, we are looking at the effect of the GMAW (Gas Metal Arc Welding) welding process with MIG (Metal Inert Gas) type on ST-42 steel by varying the V seam angle with a stick out height of 5 mm on the mechanical properties in the HAZ area.The hardness value before the welding process at an angle of 15ï‚° is in the HAZ area of 30.03 HRD for corners 30ï‚° and 45ï‚° is 32.51 HRD and 33.98 HRD, while for the impact strength at an angle of 15ï‚° is 0.2725 J/mm2, an angle of 30 ï‚° and 45ï‚° namely 0.2439 J/mm2 and 0.2320 J/mm2 Keywords: Welding, HAZ (Heat Affected Zone), Impact Strength, Hardness
Pengaruh Variasi Persentase Hardener pada Campuran Clear Coat Terhadap Kekerasan Cat Pada Pengecatan Body Kendaraan Latumaerissa, Hermon; Nanulaita, Nevada. J.M; Lekatompessy, Roy R; Ulfiyah, Laily
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2121

Abstract

Painting is a process of applying paint in liquid form to an object, to create a thin layer which then creates a hard layer or layer of paint. The function of painting itself is to give a layer to an object so that the object's lifespan can be longer. Attachment of paint to the surface can be done in many ways, wiping, smearing, brushing, spraying, dipping or in other ways. Attachment of paint by spraying is the paint attachment that is most often found in automotive painting workshops. Apart from that, attaching paint by spraying is easier in adjusting the area where painting will be carried out, the results are also good if done correctly. The quality of good painting results is influenced by many factors such as skills, materials used, etc., while determining good painting results is based on several factors, such as surface roughness, gloss power, etc. The hardness of the painting results is also greatly influenced by the percentage of hardener mixture in the paint mixture. The paint in question here is color paint (top coat). This research is to determine the best percentage of clearcoat in the painting process by testing the hardness of the painting results. The results obtained by varying the percentage of the mixture in the best clearcoat are in the percentage variations of 100 (Base): 55 (Hardener) + Thiner or Solvent (10% of Base) is 83.49 H, 100 (Base): 55 (Hardener) + Thiner or Solven (10% of Base) is 82.99 H, 100 (Base) : 45 (Hardener) + Thiner or Solven (10% from Base) is 82.51 H and the lowest is the variation 100 (Base): 60 (Hardener) + Thiner or Solvent (10% of Base) namely 79.57 H. Keywords: Painting, Clearcoat, Hardener and Paint hardness
Co-Authors Dematacco, Frederick Demataco, Fredrik Dewi, Ratna Ayu Pawestri Kusuma Febriana, Ike Dayi Fikri, Mohammad Anas Hadiwijaya, Lukman Latumaerissa, Hermon Lekatompessy, Roy R Lopuhaa, Agustinus O. Padang, Rey Joy Toding ROHMAH, FAIZATUR Sekeroney, Clara Talkua , Cley Ulfiyah, Laily