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Metalurgi

metalurgi
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Published by BRIN Publishing

ISSN : 01263188 EISSN : 24433926 DOI : 10.55981/metalurgi

Core Subject : Science, Engineering,

Industrial & Manufacturing Engineering Materials Science & Nanotechnology

The objective of this journal is the online media for disseminating results in Research and Development and also as a media for a scientist and researcher in the field of Metallurgy and Materials. The scope if this journal related on: Advanced materials and Nanotechnology Materials and Mineral characterization and Analysis Metallurgy process: extractive Ceramic and composite Corrosion and its technological protection Mineral resources manifestation Modelling and simulation in materials and metallurgy Engineering Metallurgy instrument

Arjuna Subject : Ilmu Material (semua kategori) - Ilmu Material (Lain-Lain)

Articles 287 Documents

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PROSES PELARUTAN ASAM SULFAT DAN ASAM KLORIDA TERHADAP HASIL REDUKSI TERAK TIMAH [Dissolution Process Of Sulphate Acid And Hidrochloride Acid In Reduction Tin Slag] Eko Sulistiyono; F firdiyono; Ariyo Suharyanto
Metalurgi Vol 29, No 3 (2014): Metalurgi Vol.29 NO.3 Desember 2014
Publisher : National Research and Innovation Agency (BRIN)

cover, daftar isi, abstrak vol 36 April 2021 Lia Andriyah
Metalurgi Vol 36, No 1 (2021): Metalurgi Vol. 36 No. 1 April 2021
Publisher : National Research and Innovation Agency (BRIN)

INTERDIFUSI EFEKTIF-FUNGSI KONSENTRASI DI DALAM PADUAN TERNER Ni-Re-X (X=Ru, Co)[Concentration-Dependent Effective Interdiffusion in Ni-Re-X (X=Ru, Co) Ternarry Alloys] Efendi Mabruri
Metalurgi Vol 28, No 2 (2013): Metalurgi Vol.28 No.2 Agustus 2013
Publisher : National Research and Innovation Agency (BRIN)

Leakage Investigation on a Fired Heater Tube of a Petroleum Refinery due to Carburization D.N. Adnyana
Metalurgi Vol 34, No 2 (2019): Metalurgi Vol. 34 No. 2 Agustus 2019
Publisher : National Research and Innovation Agency (BRIN)

The fired heater of a petroleum processing refinery leaks in one of the convection tubes. The tube is made of ASTM A-106 Gr.B. Process fluid in the tube is xylene with a design pressure of 15.8 kg/cm²g and design temperature of 299 °C (at the inlet) and 405 °C (at the outlet). This study aims to determine the type and causes and the mechanism of leakage in the tube. A number of tests have been carried out including visual inspection and macroscopic analysis, chemical analysis, metallographic and hardness testing, and SEM (scanning electron microscopy) analysis which is equipped with EDS (energy dispersive spectroscopy). The results obtained showed that the leak that occurred in the convection tube was caused by carburization and metal dusting. Carburization occurs in the inner walls of the tube that experience some localized overheating due to the formation of coke deposits. AbstrakDapur pemanas pada sebuah kilang pengolahan minyak bumi mengalami kebocoran pada salah satu pipa konveksi. Pipa tersebut terbuat dari baja karbon rendah jenis ASTM A-106 Gr.B. Cairan proses di dalam pipa adalah xylene dengan tekanan desain 15,8 kg/cm²g dan suhu desain yaitu 299 °C (pada saluran masuk) dan 405 °C (pada saluran keluar). Penelitian ini bertujuan untuk menentukan jenis dan faktor penyebab serta mekanisme terjadi kebocoran pada pipa tersebut. Sejumlah pengujian telah dilakukan meliputi pemeriksaan visual dan makroskopik, analisa kimia, pengujian metalografi dan kekerasan, serta analisa SEM (scanning electron microscopy) yang dilengkapi dengan EDS (energy dispersive spectroscopy). Hasil penelitian yang diperoleh menunjukkan bahwa kebocoran yang terjadi pada pipa konveksi disebabkan oleh karburisasi dan pembentukan debu/serbuk logam. Karburisasi terjadi pada dinding bagian dalam pipa yang mengalami panas berlebih secara lokal akibat terbentuknya endapan kokas.

ANALISA KERUSAKAN PADA ATAP ZINCOATING DI LINGKUNGAN ATMOSFER INDUSTRI[Damage Analysis of Zincoted Roof in the Industrial Atmospheric] Moch Syaiful Anwar; Cahya Sutowo; Andika Widya Pramono; Budi Priyono; Ronald Nasoetion
Metalurgi Vol 27, No 3 (2012): Metalurgi Vol.27 No.3 Desember 2012
Publisher : National Research and Innovation Agency (BRIN)

Karakteristik Sifat Mekanik dan Struktur Mikro Baja Laterit Paduan Ni-Cr-Mn Hasil Tempa Panas Dengan Variasi Beban Tempa [Mechanical Properties and Microstructure Characterization of Ni-Cr-Mn Alloys Lateritic Steel as a Result of Hot Forging with Variated Satrio Herbirowo; Bintang Adjiantoro; Fatayalkadri Citrawati
Metalurgi Vol 33, No 1 (2018): Metalurgi Vol. 33 No. 1 April 2018
Publisher : National Research and Innovation Agency (BRIN)

NiCrMn alloy lateritic steel has a potential as an alternative for steel raw material that has high toughness and substitute the commercial AISI 4340 steel. This research is conducted to know the characteristics of lateritic steels according to AISI 4340 standard from chemical composition, mechanical properties, and microstructure after hot forging process with variety of loads and oil as cooling media. The hot forging process was carried out at temperature of 1200 °C using 3 variety of forging loads: 50, 75, and 100 tons. The forged NiCrMn alloy lateritic steel was characterized by chemical composition analysis with OES (optical emission spectrometer), metallographic observation using OM (optical microscopy), Charpy impact test, and hardness Rockwell C. The result of chemical composition analysis showed that NiCrMn alloy lateritic steel had chemical composition in accordance to AISI 4340 with modification of Ni, Cr, and Mn elements equal to (wt.%) 1.8; 1.71; 1.87. The characteristics of NiCrMn alloy lateritic steel showed that the hardness and toughness increased when the % reduction improved. In reduction percentage of 31.02% it was obtained hardness value and energy absorb equal to 61.21 HRC and 0.166 J/mm2, with structure formed was martensit phase. However, at a higher reduction percentage of 31.72%, the hardness and impact strength values decreased to 58.56 HRC and 0.19 J/mm2. This occured because of the structure formed in the NiCrMn alloy lateritic steel was a martensite phase with retained austenite. AbstrakBaja laterit merupakan baja berbahan dasar bijih nikel laterit. Bijih nikel laterit biasa diabaikan penambang karena faktor ekonomis dan lebih mencari nikel yang berada dibawah lapisan limonit. Tujuan penelitian ini adalah mengetahui karakteristik baja laterit yaitu sifat kekerasan, ketangguhan, struktur mikro, dan struktur patahan baja laterit dengan variasi beban pada proses penempaan panas (hot forging). Penempaan panas menggunakan 3 variasi beban tempa yaitu 50, 75, dan 100 ton serta bahan awal (As Cast) dengan 1 kali penempaan pada temperatur pemanasan 1200°C. Penempaan panas menghasilkan reduksi As Cast (0%), 50 ton (18.06%), 75 ton (31.02%), dan 100 ton (31.72%). Hasil pengujian karakterisasi material menunjukkan bahwa nilai kekerasan tertinggi dan nilai impak tertinggi pada reduksi 31.02% sebesar 61.21 HRC dan 0.21 Joule/mm2. Struktur mikro yang terbentuk pada As Cast adalah ferit dan perlit sedangkan pada hasil penempaan panas adalah bainit. Hasil struktur patahan menggunakan Scanning Electron Microscope menunjukkan bahwa ukuran butir semakin halus dan pipih seiring bertambahnya beban tempa panas.

PENGARUH PROSES IN-SERVICE WELDING PADA NILAI KEKERASAN SAMBUNGAN [Influence Of In – Service Welding Process On Joining Metal Hardness Value ] Erie Martides
Metalurgi Vol 30, No 1 (2015): Metalurgi Vol.30 No.1 APRIL 2015
Publisher : National Research and Innovation Agency (BRIN)

Pengelasan merupakan metode penyambungan dua buah material atau lebih yang handal yang sering digunakan untuk proses instalasi, perawatan dan perbaikan. In-service welding yaitu penyambungan material pipa dalam kondisi operasi berjalan yang dialiri fluida. Penyambungan dilakukan antara 2 buah pipa API 5L X60, dengan jenis sambungan fillet, proses SMAW dan posisi 5F. Hasil sambungan dilakukan pengujian dan pemeriksaan secara merusak di laboratorium, yang meliputi pengujian bengkok, kekerasan dan pemeriksaan struktur makro. Peranan pemanasan awal sangat penting untuk menghindari perbedaan signifikan antara temperatur di logam dasar, logam cair dan fluida kerja serta untuk menghindari retakan. Terjadi fenomena pendinginan cepat pada in-service welding yaitu pada daerah pengelasan yang mendekati pipa berfluida, sehingga menghasilkan nilai kekerasan pada daerah terpengaruh panas (HAZ) lebih tinggi dari logam dasar maupun logam cair. AbstractWelding is a reliabel method to joints two material or more, and its use in instalation process, maintenance and repairingprocess. In-services welding is joining the pipe material, where the pipe in working condition which still flowed by fluids.Joining process conduct between 2 API 5L X60 pipes using fillet joints type, SMAW process and 5F position. Specimenof welded materials tested and inspected in laboratory, the tests encompass bending, hardness, and macro structure. Theroles of preheating is very important to avoid significant differentiation between temperature at the base metal, weld metal,and working fluids, also its to avoid craks. Rapid cooling phenomena occurs in in-services welding at welded area whichnear to the fluided pipe, as a result the area of heat affected zone (HAZ) has a higher hardness value than the base metal andweld metal.

Pengaruh Suhu dan Waktu Tempering Terhadap Kekerasan, Struktur Mikro, dan Laju Korosi Baja Tahan Karat Martensitik 13Cr3Mo3Ni [The Influence of Time and Temperature Tempering on Hardness, Microstructure and Corrosion Rate of 13Cr3Mo3Ni Stainless Steel] Hadi Perdana; Moch Syaiful Anwar; Andinnie Juniarsih; Efendi Mabruri
Metalurgi Vol 32, No 1 (2017): Metalurgi Vol. 32 No. 1 April 2017
Publisher : National Research and Innovation Agency (BRIN)

The 13Cr3Mo3Ni martensitic stainless steel is the modified 410 type steel for steam turbine blade application. This paper reports the effect of tempering temperature and time on hardness, microstructure and corrosion rate of the modified steel. Microstructure observation was performed using optical microscopy and SEM-EDS, hardness testing using Rockwell C hardness tester and the corrosion test in 3.5% NaCl solution using Gamry G750 instrument. In general, the hardness of the steel decreased with increasing of tempering temperature. However, the hardness increased at the tempering temperature 500-650 °C showing secondary hardening, and the metal carbides with sub-micron in sizes were observed in the microstructure. Longer tempering time of 6 h resulted in decreased hardness without secondary hardening It can be reported also that the tempering temperature changed the potential, current and rate of corrosion of the13Cr3Mo3Ni steel. AbstrakBaja tahan karat 13Cr3Mo3Ni merupakan modifikasi dari baja tahan karat martensitik 410 untuk digunakan sebagai material sudu pada turbin uap. Tulisan ini memaparkan pengaruh suhu dan waktu tempering terhadap kekerasan, struktur mikro dan laju korosi baja tahan karat martensitik 13Cr3Mo3Ni. Pengujian yang dilakukan adalah pengamatan struktur mikro menggunakan mikroskop optik dan SEM-EDS, uji kekerasan dengan Rockwell C dan uji korosi di dalam larutan 3,5% NaCl dengan alat Gamry G750. Secara umum kekerasan baja menurun dengan naiknya suhu tempering, kecuali pada suhu 500-650 °C terjadi peningkatan kekerasan akibat adanya secondary hardening dan karbida logam berukuran sub-mikron teramati sebagai penyebabnya. Peningkatan waktu tempering menjadi 6 jam mengakibatkan penurunan kekerasan dan penghilangan efek secondary hardening. Perbedaan suhu tempering juga menghasilkan perbedaan potensial, arus serta laju korosi baja 13Cr3Mo3Ni.

cover, daftar isi, abstrak vol 35 Agustus 2020 Lia Andriyah
Metalurgi Vol 35, No 2 (2020): Metalurgi Vol. 35 No. 2 Agustus 2020
Publisher : National Research and Innovation Agency (BRIN)

PENGARUH UNSUR KE-EMPAT TERHADAP TRANSFORMASI FASA DAN EFEK INGAT BENTUK (SHAPE MEMORY EFECT) PADUAN Ti- Ni-Cu[The Influence of Fourth Element on Phase Transformation and Shape Memory Effect (SME) of Ti-Ni-Cu Alloys] Efendi Mabruri; Bambang Sriyono; Bintang Adjiantoro; D N Adnyana
Metalurgi Vol 28, No 1 (2013): Metalurgi Vol.28 No.1 April 2013
Publisher : National Research and Innovation Agency (BRIN)

Page 13 of 29 | Total Record : 287

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Contact Name
Ika Kartika

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Kota tangerang selatan,

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