Logam merupakan material yang sangat berguna dalam berbagai industri, namun dalam penggunaanya sering terjadi penurunan mutu logam yang salah satu penyebabnya adalah korosi. Peristiwa korosi sangat mudah terjadi pada jenis logam yang reaktif terhadap lingkungan. Proses korosi terjadi secara alamiah dan laju korosinya tergantung dari kondisi lingkungannya. Penelitian ini bertujuan untuk mengetah…
Beton bertulang merupakan campuran antara beton polos dan tulangan baja yang direncanakan dengan asumsi dapat menahan gaya aksial dan momen yang terjadi. Beton bertulang dipergunakan dalam suatu konstruksi bangunan berupa kolom, balok, plat lantai, dan sebagainya. Beton bertulang dapat dipergunakan untuk konstruksi seperti gedung, jembatan layang, bendungan dan sebagainya. Kolom direncanakan da…
The development of technology in the field of construction cannot be separated from the metal joining process, or what is often called welding. This has an important role in engineering and repair or metal repair. When the process of joining the welded metal with steel metal becomes one unit, which means, the strength of the welded metal must be the same as the steel metal used. (Pujo M. & JS, …
Cold-formed steel is a material that is starting to be widely used as structural elements such as beams and columns. The use of cold-formed steel as a structural element requires a connecting medium, one of which is a gusset plate. Meanwhile, the types of gusset plates that can be used as connections are haunched and rectangular gusset plates. In this research, tests were carried out to compare…
Seiring dengan kemajuan teknologi dan ilmu pengetahuan yang mempunyai peranan penting dalam mengisi berbagai sektor yang ada dan selalu berkembang serta berubah secara cepat terutama dibidang konstruksi yang selalu mengandalkan teknologi yang baru. Dalam rangka menyambut Asian Games 2018 di Palembang pemerintah membangun infrastruktur transportasi yang alternatif dan dapat mengantisipasi jumlah…
In the current era, steel material is the basic material in a construction that combines or connects using welding methods. The disimilarity of the welding current used is an aspect of the influence of the creation of corrosion rates. The carbon content of steel causes it to oxidize easily so that rust appears. This study aims to find answers about how strong welding currents affect the corrosi…
Pack Carburizing is a treatment process where when testing the hardness of the steel surface using carbon content as a hardness enhancer element. In this study, researchers used ST 37 steel which has a carbon content of 0.5% so that it has soft properties and weak strength compared to medium carbon steel and high carbon steel in general. Pack carburizing is a heat treatment process which is use…
To get a good quality weld connection, please note the design of weld, the way of welding, construction as well as the usefulness of the material to be welded. Medium carbon steel is use in wrench tools, ships, bridges and trains. In this research, joint method use is welding smaw use elektrode E7018 but variations of current electrical welding different, namely 90A, 120A and 150A. And performe…
The selection process of switching to the materials used greatly affect the yield and quality of the joint area. To avoid errors in the selection process of joint the material used is understanding the basics of grafting. In this study the method joint used is brazed and solder e d on Steel and brass. And testing is performed hardness test, macro structure, NDT, microstructure test and bending …
Dalam perencanaan konstruksi bangunan baja, profil baja yang digunakan untuk merancang balok dan kolom merupakan hal yang mutlak untuk diperhatikan. Karena kekuatan baja sangat menentukan layak atau tidaknya suatu struktur bangunan untuk menahan beban yang bekerja pada tiap bagian struktur bangunan. Kemudian sebagai penentu dari tingkat keamanan struktur ditentukan oleh desain rasio yang merupa…
Acne is caused by the bacterium Propionibacterium acnes. The ethanol extract of yellow bajakah root (Coscinium fenestratum) contains active antibacterial compounds. In cream form, this extract can be applied directly to infected skin, providing optimal therapeutic effects. This study aims to develop an anti-acne cream formulation with varying concentrations of yellow bajakah root extract (2%, 4…
This research has compared the mechanical properties of medium carbon Steel that is not heat treated and heat normalizing, heat treated, quenching with water and silicone oil medium at a temperature of 85(f C in of 2.5 hours. From the results of hardness testing of medium carbon Steel, which heat treated the average hardness values (VHN) is increased, amounling 9.067% after normalizing, quenchi…
This research aims to determine the effect of Ambon banana peel extract inhibitors on the corrosion rate of ST 42 steel in a NaCl environment. The corrosion rate calculation uses the weight loss formula. The method used in this research is the experimental method. The initial step taken was to cut the specimens, namely specimens 1, 2, 3 and 4. The specimens were given heat treatment at a temper…
This research aims to determine the effect of radiator water cooling media in the quenching process on the hardness of ST-41 steel. This research is a pure experiment. This research stage includes, among other things, preparation of tools and materials. Then Quenching at temperatures of 750º, 800º, 850º, 900º and those that are not treated. After heat treatment, the specimens were tested fo…
This research aims to determine ehether there is an impact caused by tea leaf extract as a cooling mediun in the quenching process on the corrosion rate. This type of research is experimental research, where ST41 steel is treated to see what impacts occur. In this study, st41 steel was given heat treatment ( quenching ) using tea leaf ectract cooling media, 5 specimens were used a different con…
Corrosion is one of the causes of damage to metal materials, including during the welding process, where thinning or reduction of material occurs due to the environment. This research is an experimental study which aims to determine the effect of using brake fluid in the HAZ area of welding results on the corrosion rate of SS400 steel. This research uses a welding process as heat treatment, the…
Effec of Composition of Pack Carburizing with Durian Peel Charcoal on the Hardness Value of St 41 Steel By: Affini Monica Zairoh NIM: 06121182025007 Mechanical Engineering Education Study Program ABSTRACT Pack carburizing is a heat treatment process with the aim of determining the effect of the caralyst composition and durian skin carbon on the hardness value. The catalyst used in this reseacrh…
Pack carburizing is a heat treatment process which is used to harden the surface of steel using carbon as a hardness-increasing element.. This research aims to see changes in hardness in ST 37 steel which was packed carburized at a temperature of 900℃ with a posttest variation of coconut shell charcoal with a calcium carbonate (CaCO3) catalyst totaling 5 specimens. From the results of Vickers…
Pack carburizing is a heat treatment process which is used to harden the steel surface by using carbon content as a hardness enhancer. In this study using ST 40 steel as a test specimen, this steel is included in the low carbon steel. This study aims to see the effect of variations in gelam wood charcoal and coconut shell as carbon used in the pack carburizing process and to see the effect of v…
Medium carbon steel has a carbon content of about 0.42% to 0.60%. In use, carbon steel is being used as a component of automobile axles, crankshafts, boiler rails. The purpose of this study was to determine the effect of temperature variations on the hardness of medium carbon steel. The method used in this research is the experimental method. Specimens are heated using a heating furnace with a …
Penelitian ini adalah proses perlakuan panas (heat treatment) dengan menggunakan dua perlakuan, pack carburizing lalu dilanjutkan proses quenching. Pack carburizing merupakan salah satu jenis perlakuan panas dengan cara menambahkan karbon pada permukaan baja dan dipanaskan sampai mencapai batas austenit. Serbuk Karbon yang digunakan dalam penelitian ini berasal dari arang kayu jati. lalu peneli…
BAJA ST 41 ADALAH BAJA KARBON RENDAH YANG DISEBUT JUGA BAJA LUNAK, BAJA INI MEMILIKI KANDUNGAN KARBON SEBESAR 0,08% - 0,20%. MATERIAL INI BANYAK SEKALI DIGUNAKAN UNTUK PEMBUATAN BAJA BATANGAN, TANGKI, PERKAPALAN, JEMBATAN, MENARA, PESAWAT ANGKAT DAN DALAM PERMESINAN. TUJUAN PENELITIAN INI UNTUK MENGETAHUI PENGARUH SUHU DALAM PROSES HARDENING PADA STRUKTUR MIKRO PERMUKAAN BAJA KARBON RENDAH DAN …
Baja ST 30 memiliki kandungan karbon kurang dari 0,30 % sehingga memiliki sifat yang lunak dan kekuatan yang lemah dibandingkan baja karbon menengah dan baja karbon tinggi. Quenching merupakan suatu proses pengerasaan pada baja yang dilakukan dengan cara di panaskan mencapai batas austenite. Tujuan penelitian untuk mengetahui pengaruh media pendingin magnesium sulfat pada proses quencing terhad…
Inhibitor yaitu suatu zat yang jika ditambahkan dalam jumlah sedikit dapat menghambat laju korosi. Penelitian ini menggunakan inhibitor daun rambutan yang diberikan pada spesimen baja AISI 1045 dengan cara diberi perlakuan quenching dengan suhu 850 oC agar inhibitorn ya bisa terserap kedalam spesimen dengan baik. Tujuan dari penelitian ini yaitu untuk mengetahui pengaruh inhibitor daun rambutan…
Penelitian ini bertujuan untuk mengetahui perbandingan kekuatan tarik, dan struktur mikro pada material baja karbon sedang AISI 1050 setelah dilakukan pengelasan GMAW dengan kampuh X dan arus listrik yang digunakan 95 A dan 105 A. Metode penelitian yang digunakan adalah penelitian eksperimen, berdasarkan perlakuan yang diberikan oleh peneliti yaitu berupa pengelasan dengan menggunakan las GMAW …
This research is motivated by corrosion that can occur at any time and cannot be avoided, especially in steel, but the corrosion rate can be controlled so that the workpiece can be used longer. This research was conducted to determine the effect of the quenching process with aluminum solution cooling medium on the corrosion rate of ST 37 steel. The method used is the experimental method, this m…
This study used an experimental research type, in which experimental research was carried out by looking at the effect that occurred on the specimen. This research was conducted to determine the effect of using industrial salt additives in cooling media on the hardness of AISI 4340 steel. Specimens were hardened at 925°C, which were then quenching using industrial salt solutions with different…
Penelitian ini menggunakan metode eksperimen yang meliputi proses pengelasan, pendinginan secara cepat, kemudian pengujian tarik. Media pendingin merupakan media yang dipakai dalam menurunkan temperatur logam setelah dilakukan proses perlakuan panas. Pendinginan yang dilakukan setelah proses pengelasan dapat mengubah struktur mikro dari logam yang dilas. Proses pendinginan dilakukan terhadap ha…
Korosi adalah kerusakan yang disebabkan oleh reaksi kimia antara bahan logam dan unsur-unsur lain yang ditemukan di alam. Penelitian ini adalah penelitian eksperimen dengan tujuan mengetahui pengaruh perlakuan panas quenching pada zat pelambat karat dengan larutan minyak rem terhadap laju korosi pada material Baja AISI 1045. Pada penelitian ini peneliti melakukan perlakuan panas quenching pada …