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Rudi Siswanto, Rudi
Universitas Lambung Mangkurat
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Pengaruh Bentuk Kampuh Terhadap Panjang, Kedalaman Penetrasi dan Lebar Hasil Pengelasan Menggunakan Las Busur Listrik (SMAW Rudi Siswanto
Jurnal Fisika FLUX Vol 9, No 2 (2012): Jurnal Fisika FLUX Edisi Agustus 2012
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1093.173 KB) | DOI: 10.20527/flux.v9i2.6101

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh bentuk kampuhterhadap panjang, kedalaman penetrasi dan lebar hasil pengelasan. Metode yangdigunakan dalam penelitian ini adalah metode eksperimen uji laboratorium. Bahanplat baja karbon mild steel St. 37 dibuat spesimen yaitu dipotong sesuai ukuran,kemudian dilas dengan variasi bentuk kampuh V, I dan ½ V, menggunakanelektroda RB diameter 2,6 m, dengan kuat arus 70 Ampere. Setelah selesai dilaskemudian didinginkan di udara. Kemudian specimen dipotong dengan arahmemotong arah pengelasan. Selanjutnya permukaan yang dipotong dikikir sampaihalus, kemudian diukur untuk mengetahui panjang, lebar dan kedalaman penetrasihasil pengelasannya. Hasil pengujian menunjukkan bahwa bentuk kampuhberpengaruh terhadap panjang dan kedalaman penetrasi hasil pengelasan, tetapitidak ada pengaruh yang signifikan terhadap lebar hasil pengelasan. Hasilpengelasan paling panjang menggunakan bentuk kampuh ½ V, yaitu 149,11 mm,hasil pengelasan paling pendek menggunakan bentuk kampuh I, yaitu 60,04 mm.Hasil pengelasan paling dalam adalah menggunakan bentuk kampuh ½ V , yaitu4,09 mm, kedalaman penetrasi hasil pengelasan paling dangkal menggunakanbentuk kampuh V, yaitu 2,31 mm. Lebar Hasil pengelasan menggunakan kampuh V,I dan ½ V diperoleh dimensi hampir sama yaitu 10,50 mm.
PENGOLAHAN LIMBAH PLASTIK DI WILAYAH KEL.CEMPAKA MENGGUNAKAN MESIN PELUMER PLASTIK Rudi Siswanto; Abdul Ghofur; Mastiadi Tamjidillah
ELEMEN : JURNAL TEKNIK MESIN Vol 7 No 1 (2020)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v7i1.102

Abstract

Sampah plastik masih menjadi permasalahan besar di Kelurahan Cempaka Kota Banjarbaru. Diperkirakan setiap harinya terdapat 2-3 karung sampah plastik yang menumpuk berasal dari limbah warga. Sebagian besar berupa kantong plastik kemasan, cup dan botol bekas minuman. Salah satu usaha dalam mewujudkan konsep zero waste adalah mendaur ulang (recycle) sampah plastik tersebut, yaitu limbah plastik diolah menjadi produk paving block. Oleh karena itu, diperlukan alat untuk melumerkan plastik tersebut. Metode yang digunakan adalah dengan melakukan studi lapangan dan membuat mesin pelumer plastik dengan dimensi panjang 60,3 cm diameter 60 cm, kapasitas aliran plastik cair adalah 1,25 kg/menit dan putaran pengaduk adalah 40 Rpm, dengan kapasitas produksi 20 buah paving block/jam, suhu untuk melumerkan plastik adalah 250oC-260oC. Adapun waktu yang diperlukan untuk melumerkan plastik HDPE adalah 60 menit dan Plastik PET 30-40 menit. Hasil uji bending paving block rata-rata sebesar 11,58 MPa.
PEMANFAATAN PADUAN AL (SCRAP) SEBAGAI BUCKET TURBIN PELTON MENGGUNAKAN METODE PENGECORAN EVAPORATIVE Ali Ridho; Rudi Siswanto
AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 3, No 1 (2017)
Publisher : Universitas Islam Kalimantan Muhammad Arsyad Al Banjari

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.857 KB) | DOI: 10.31602/ajst.v3i1.987

Abstract

Aluminum rongsok (scrap) is widely produced from households, IKM, offices, factories and so on in South Kalimantan. Along this time Al rongsok only collected by the collectors and then sold to the company smelting (in Java). Al rongsok can be recycled and used as a cast product, so potentially produce components, one of which is Pelton turbine bucket. This research aims to; (1) to create a prototype Pelton water-type bucket turbine using styrofoam pattern (2) to know the micro structure, hardness, tensile strength, and impact strength. The furnace for smelting uses a krasibel type furnace with charcoal wood fuel. Material for casting used Al alloy (scrap). The evaporative casting method is to use styrofoam as a molding pattern that is dumped in the printed sand. This method will produce castings that match the pattern / model formed. Melting is done by melting the Al in the kitchen krusibel then poured on the variation of casting temperature 650, 670, 690 and 710 oC. The casting results are then tested for mechanical properties (micro structure, hardness, tensile strength, and impact strength). The test results concluded, Al alloy (scrap) can be utilized and developed as prototype of cross flow water turbine blade / bucket using evaporative casting method. the higher the temperture of the hypereutectic Si structure is present between the dendrite Al of thin short flakes into thick, long bits. At temperatures above 650 oC, the value of hardness decreases with the increase of pouring temperature, while tensile stress decreases with increasing of pouring temperature. Impetus has been declining as the pouring temperature increases.Keywords: Evaporative casting, Al (Scrap), physical-mechanical properties, Pelton turbine bucket 
ANALISIS POROSITAS DAN KERASAN PADUAN Al-12,6%Si DENGAN VARIASI WAKTU TUNGGU DALAM CETAKAN DAN MEDIA PENDINGIN HASIL PENGECORAN EVAPORATIVE Rudi Siswanto; Abdul Ghofur; Komang Aria Kresna Kepakisa
Jukung (Jurnal Teknik Lingkungan) Vol 4, No 1 (2018): MARET 2018
Publisher : Program Studi Teknik Lingkungan Fakultas Teknik Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jukung.v4i1.4663

Abstract

Tujuan penelitian adalah mengetahui pengaruh waktu tunggu dalam cetakan dan media pendingin terhadap porositas dan kekerasan dari produk hasil pengecoran. Metode pengecoran menggunakan pengecoran evaporative. Material yang digunakan paduan Al-12,6%Si (daur ulang) dari piston. Tungku peleburan menggunakan tungku jenis crusibel. Paduan Al dipanaskan di dalam tungku hingga mencair, kemudian dituang ke dalam cetakan pada temperatur 700 0C. Selanjutnya didinginkan dalam cetakan dengan variasi waktu 10 dan 15 menit. Kemudian coran dikeluarkan dari cetakan dan didinginkan dengan variasi media pendingin; udara, air dan air garam selama 30 menit.  Hasil pengecoran dibuat spesimen dan dilakukan pengujian porositas dan kekerasan. Hasil pengujian menunjukkan bahwa : (1) waktu tunggu dalam cetakan dan jenis media pendingin tidak berpengaruh besar terhadap porositas.  (2) waktu tunggu dalam cetakan dan jenis media pendingin sangat berpengaruh terhadap kekerasan coran. Kata kunci : kekerasan, media pendingin, paduan Al-12%Si, pengecoran evaporative, porositas. The purpose of this research is to know the influence of waiting time in mold and cooling media to porosity and hardness of foundry product. The casting method uses an evaporative casting. The material used Al-12,6%Si alloy (recycle) from piston. The melting furnace uses a crucible furnace. The Al alloy is heated in the furnace until it is melted, then poured into the mold at a temperature of 700 0C. Further cooled in a mold with a time variation of 10 and 15 minutes. Then the cast was removed from the mold and cooled with a variation of the cooling medium; air, water and brine for 30 minutes. The casting result is made specimen and the porosity and hardness testing is done. Test results show that : (1) the waiting time in the mold and the type of cooling medium has no significant effect on porosity. (2) the waiting time in the mold and the type of cooling medium strongly affect the hardness of the castings.Keywords : Al-12% Si alloy, coolant medium,  evaporative casting, hardness, porosity. 
PEMANFAATAN FLY ASH BATUBARA DENGAN ADITIF KAOLIN SEBAGAI FILTER GAS BUANG TERHADAP EMISI GAS BUANG SEPEDA MOTOR SATRIA FU 150 Abdul Ghofur; Rudi Siswanto
Jukung (Jurnal Teknik Lingkungan) Vol 4, No 1 (2018): MARET 2018
Publisher : Program Studi Teknik Lingkungan Fakultas Teknik Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jukung.v4i1.4661

Abstract

Meningkatnya jumlah kendaraan bermotor setiap tahun berdampak terhadap peningkatan gas buang, salah satu teknologi yang dapat digunakan untuk mereduksi emisi gas buang kendaraan yaitu dengan penambahan filter gas buang pada saluran gas buang kendaraan. Filter gas buang merupakan sebuah filter (penyaring) yang menggunakan keramik berpori, dimana media tersebut diharapkan dapat membantu atau mempercepat terjadinya proses penyaringan sehingga gas seperti CO dan HC dapat tersaring.Penelitian ini menggunakan tiga komposisi dari campuran fly ash dan kaolin. Dari hasil penelitian diketahui bahwa filter gas buang berbahan fly ash batubara dan kaolin memiliki kemampuan dalam mengurangi emisi gas buang HC dan CO serta dalam mengurangi tingkat kebisingan. Dibandingkan dengan knalpot tanpa filter gas buang, persentase tertinggi filter gas buang komposisi A dalam mengurangi emisi HC sebesar 87,89 % pada rpm idle, sedangkan untuk CO sebesar 78,21 % pada rpm idle. Persentase tertinggi filter gas buang komposisi B dalam mengurangi emisi HC sebesar 85,29 % pada rpm idle , sedangkan untuk CO sebesar 72,13 % pada rpm idle. Persentase tertinggi filter gas buang komposisi C dalam mengurangi emisi HC sebesar 76,11 % pada rpm idle , sedangkan untuk CO sebesar 66,57 % pada rpm idle.Kata Kunci: emisi gas buang, filter gas buang, fly ash, kaolin.With the increased motor cycle, every year have been affecting the populated from combustion gas, one of the technology that can reduce the amount of combustion gas is to install filters on the exhaust nozzle. Exhaust filters is a porous permeable ceramics filterer, where it should aid or hasten the filtering process like carbon monoxide (CO) and hydro carbon (HC). In this experiment using three types of combined fly ash and kaolin. From the result known that combined fly ash and kaolin can reduce emission gas of CO and HC as well as the noise level. In result known that exhaust filters is superior in overall performance and reducing HC emission than any standard exhaust nozzle. Comparing between nozzle without filterer, with type A composition the highest percentage of HC decreased emission by 87.89% in idle rpm, while the highest percentage of CO decreased emission by 78.21% in idle rpm. On type B composition, the highest percentage of HC decreased emission by 85.29% in idle rpm, while the highest percentage of CO decreased emission by 72.13% in idle rpm. Last with type C composition the highest percentage of HC decreased emission by 76.11% in idle rpm, while the highest percentage of CO decreased emission by 66.57% in idle rpm. Key word : cly, exhaust filters, exhaust gas emission, fly ash.
PENGARUH WAKTU KONTAK AIR LINDI DAN UDARA TERHADAP LAJU KOROSI BAJA ST-41 DAN ST-60 Muhammad Irfan Riyadi; Rudi Siswanto
JTAM ROTARY Vol 3, No 2 (2021): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v3i2.4368

Abstract

The use of metals in the environment is especially important in environments such rubbish in heavy equipment or trucks, especially those of the tailgate is a tool to bring a variety of organic waste and inorganic bring the matter dissolved through a liquid called leachate and make contact or direct contact with the steel so that corrosion occurs due to leachate or wastewater flow contains many corrosive compounds that make part tailgate become quickly corroded. This study aims to determine the bias steel resist corrosion rate. The steel used is steel steel ST-41 and ST-60 is a low carbon steel and medium carbon steel. The methods used in research in the methods of losing weight and observe the types of corrosion that occurs by means of immersion with ASTM G31-72 which vary contact time for 3 weeks. Based on research conducted showed the corrosion rate of the fastest occur in steel ST-60 with a contact time of 1 week soaked the leachate and 2 weeks in contact with the air due to differences in the composition of the steel ST-60 and steel ST-41 which has a chromium content so high that steel ST-41 is superior in resisting corrosion rate while the type of corrosion that occurs is evenly corrosion and atmospheric corrosion.
PENGARUH VARIASI HOLDING TIME DAN MEDIA PENDINGIN TERHADAP KEKERASAN DAN STRUKTUR MIKRO BAJA SUS 630 METODE HARDENING Dwi Herizen; Rudi Siswanto
JTAM ROTARY Vol 2, No 2 (2020): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v2i2.2411

Abstract

SUS 630 memiliki kekerasan 30,9 HRC dan kandungan Chromium 12% berdasarkan pemakaiannya di PT. Pupuk Kalimantan Timur merekomendasikan kekerasan sebesar 55 HRC, untuk meningkatkan kekerasan material dapat dilakukan dengan teknik material engineering yaitu Hardening. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh variasi waktu tahan dan media pendingin terhadap kekerasan dan mikrostruktur baja sus 630. Proses pengerasan dilakukan hingga mencapai suhu 1020 0C kemudian waktu tahan dengan variasi 10, 20, 30, 40, dan 50 menit kemudian dicelupkan ke dalam air, air garam, dan minyak sampai suhu kamar. Struktur mikro diuji menggunakan mikroskop optik dengan perbesaran 400x dan kekerasan menggunakan kekerasan Rockwell C dengan beban 150 kg. Pengamatan struktur mikro setelah pengerasan struktur yang terbentuk adalah bilah martenstie, sisa austenit, dan karbida logam. Hasil uji kekerasan tertinggi pada media pendingin air (34,2 HRC), air asin (34,2 HRC), dan minyak (34,1 HRC) dan bahan baku (30,9 HRC). Dari penelitian ini dapat disimpulkan bahwa proses pengerasan dapat meningkatkan nilai kekerasan. SUS 630 Steel hardness is 30.9 HRC and Chromium content is 12%, based on its use at PT. Pupuk Kalimantan Timur recommended a hardness of 55 HRC, to increase material hardness can be done by means of material engineering, namely Hardening. The aim of the study was to determine the effect of variations in holding time and cooling media on the hardness and microstructure of steel sus 630. The hardening process was carried out to reach 1020 0C then holding time with variations of 10, 20, 30, 40, and 50 minutes then dipped into water , salt water, and oil to room temperature. Microstructure was tested using an optical microscope with 400x magnification and hardness using Rockwell C hardness with a load of 150 kg. The observation of the microstructure after hardening of the structure formed is the martenstie lath, residual austenite, and metal carbide. The hardness test results were highest in water cooling media (34.2 HRC), salt water (34.2 HRC), and oil (34.1 HRC) and raw material (30.9 HRC). From this study it can be concluded that the hardening process can increase the value of violence.
PROSES MANUFAKTUR MESIN POLES DAN AMPELAS UNTUK PROSES METALOGRAFI M. Ikhsan Almadani; Rudi Siswanto
JTAM ROTARY Vol 2, No 1 (2020): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v2i1.2001

Abstract

Mesin poles dan amplas adalah salah satu alat yang bekerja menggunakan energi listrik. Sifat mekanik suatu logam atau paduan dapat diamati, salah satunya adalah dengan menganalisis struktur mikro material. Pengujian metalografi dilakukan untuk mengamati struktur mikro. Dalam proses pengerjaan sampel pengujian metalografi selalu melibatkan mesin poles dan amplas. Perumusan masalah dalam pembuatan mesin poles dan amplas ini adalah “Bagaimana proses pembuatan mesin poles dan amplas dan berapa biaya pembuatan mesin poles dan mesin abrasif”. Komponen pada mesin adalah rangka, motor, bantalan, katrol, cakram yang dipoles, reservoir, pompa air, dan keran air, sedangkan alat dan mesin yang digunakan dalam proses pembuatan adalah alat las listrik, penggiling listrik, penggiling duduk, mesin bor tangan, mesin bor duduk, tuas potong, tang sungai, pengelasan asetilena dan mesin bubut. The polishing and sandpaper machine is one of the tools that works using electrical energy. The mechanical properties of a metal or alloy can be observed, one of which is by analyzing the microstructure of the material. Metallographic testing is carried out aimed at observing the microstructure. in the process of working on metallographic testing samples involving a polishing machine and sandpaper. The formulation of the problem in making this polishing machines and sandpaper is “What is the process of manufacturing polishing machines and sandpaper and how much is the cost of manufacturing polishing and abrasive machines”. Components on the engine are frame, motor, bearing, pulleys, polished discs, reservoirs, water pumps, and water taps, while the tools and machines used in the manufacturing process are electric welding tools, electric grinders, sitting grinders, hand drill machines, sitting drill machines, cut levers, riverter pliers, acetylene welding and lathes.
PENGARUH TEMPERATUR TUANG DAN JENIS MATERIAL AL RONGSOK (PISTON SEPEDA MOTOR DAN KALENG MINUMAN) TERHADAP POROSITAS, KEKERASAN, DAN STRUKTUR MIKRO HASIL PENGECORAN EVAPORATIVE Muhammad Jurni; Rudi Siswanto
JTAM ROTARY Vol 1, No 2 (2019): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v1i2.1740

Abstract

Aluminum used many generated from household, workshop, office, factory and so on. All this time, the Al scrap is only collected by the owner and sold to the foundry foundry industry. It can be recycled into various products for various alternative products and has the potential to become a source of business. The evaporative casting method is to use Styrofoam as a pattern dumped in the printed sand. This method will produce castings that match the pattern of Styrofoam made. Melting is done by liquefying Al in a crucible furnace and then poured with a variation of casting temperatur of 650°C, 700°C, 750°C, 800°C. The objective of this research is to know the temperatur of pouring temperatur and material type to micro structure, porosity, and hardness of evaporative casting. The smelting furnace uses a crucible furnace with charcoal wood fuel. Materials used for casting Al scrap piston motorcycles and beverage cans. From the observation of the microstructure shows that the higher temperatur of the dendrite chamber size will change from short thin flakes to flakes. The thicker the thicker the lighter the export the higher and the higher the hardness. Keywords: Evaporative Casting, Effect Of Casting Temperatur
PENGARUH MEDIA PENDINGIN DAN WAKTU TUNGGU TERHADAP POROSITAS, KEKERASAN DAN STRUKTUR MIKRO MATERIAL AL PADUAN (RONGSOKAN) MENGGUNAKAN METODE PENGECORAN EVAPORATIVE Komang Aria Kresna Kepakisan; Rudi Siswanto
JTAM ROTARY Vol 1, No 1 (2019): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v1i1.1397

Abstract

The purpose of this research is to know the effect of cooling media and holding time to porosity, hardness and micro structure of Al alloy material (scrap) using evaporative casting method. The method used in this research is the experimental method of smelting Al Alloy piston scrap and poured at 700°C in Styrofoam pattern mold with 10 and 15 minutes holding time, then cooled with medium air, brine, and water of PDAM for 30 minutes. The material used is excavator aluminum alloy (scrap) izumi piston with silicon aluminum alloy (Al-12% Si). The highest hardness value obtained from the results of cooling casting with the brine cooling medium for 10 minutes that is equal to 217,996 kg / mm2 average HV. At porosity, the highest value was obtained at holding time of 15 minutes with PDAM water cooling medium 5.088% against raw material. While the result of visual observation with 50x magnification of microstructure of specimen to raw material, Si material in raw material has significant length increase. The conclusion of the research results is that re-casting with variations of cooling medium and waiting time will increase hardness and increase porosity, except on brine cooling medium. Keywords: MTTR, MTTF, RCM (Reliability Centered Maintanance)
Co-Authors Abdul Ghofur Abdul Ghofur Aji, Anas Satria Ali Ridho Anwar Anwar Aqli Mursadin Asep Dhonie Adetya Rachman Diaurahman Diaurahman Dwi Herizen Galih Aprianto H. Midi H. Midi Harunsyah, H Hendra Hadi Saputra Jumalik, Jumalik Komang Aria Kresna Kepakisa Komang Aria Kresna Kepakisan M. Ikhsan Almadani Ma'ruf Ma'ruf Ma'ruf, Ma'ruf Mahmud Mahmud Mastiadi Tamjidillah Mastiadi Tamjidillah Mastiadi Tamjidillah, Mastiadi Ma’ruf Muhammad Irfan Riyadi Muhammad Jurni Muhammad Ramadhan Anshori Putra, Fajar Perdana Rachmat Subagyo Rachmat Subagyo Ramagisandy, Holy Rian Effendi Riyadi, M. Irfan Salmyah, S Sari Hartini Setiawan, Sigit Aji Suryadi Suryadi Syaiful Rahman Yuono, Nanang