Analisa Variasi Kandungan Air Di Elektroda E7018 Pada Hasil Pengelasan SMAW Dengan Arus 220A Terhadap Material ST37 Menggunakan Metode Radiografi Dan Makro Etsa

Dewa, Bintang Putra (2017) Analisa Variasi Kandungan Air Di Elektroda E7018 Pada Hasil Pengelasan SMAW Dengan Arus 220A Terhadap Material ST37 Menggunakan Metode Radiografi Dan Makro Etsa. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Salah satu permasalahan dalam pengelasan suatu material logam yaitu apabila sebuah logam hasil pengelasan SMAW (Shielded Metal Arc Welding) menggunakan elektroda yang memiliki kandungan air akibat dibiarkan di udara bebas ataupun terkena air hujan. Pada penelitian ini akan menganalisa mengenai pengaruh perbedaan waktu perendaman pada filler (tanpa direndam, 30 menit, 45 menit, 60 menit) sebelum dilakukan pengelasan SMAW terhadap material ST37 dengan pengujian radiografi (ASME Sect. V) yang bertujuan untuk mengetahui cacat yang terjadi pada hasil lasan pada material yang telah diberi kampuh 60º, dan uji metalografi (makro etsa) yang bertujuan untuk mengetahui struktur makro pada daerah batasan Base Metal, HAZ (Heat Affected Zone), dan Weld Metal. Dari hasil yang didapat pada pengujian radiografi, didapatkan bahwa spesimen dengan filler yang tidak direndam memiliki cacat yang lebih sedikit (cluster porosity dan porosity) dan hanya terjadi pada dua titik daripada filler yang direndam selama 30 menit (slug inclusion dan porosity), 45 menit (slug inclusion, porosity, dan cluster porosity), dan 60 menit (slug inclusion dan porosity). Sedangkan pada pengujian metalografi (makro etsa), didapatkan bahwa lebar HAZ pada filler yang tanpa direndam memiliki lebar yang lebih besar yaitu (4,4mm) daripada filler yang direndam selama 30 menit (3,93mm), 45 menit (2,98mm), dan 60 menit (1,96mm). ========================================================================== One of the problem in welding a metal material that is in a metal welding using SMAW electrodes result that have moisture content due to be left in free air or exposed to rain. In the current study will analyze about the influence of the different of time soaking in the filler (without being soaked, 30 minutes, 45 minutes, and 60 minutes) prior to welding SMAW againts ST37 with testing materials radiography (ASME Sect. V) which aims to discover defects that occur on the results of welds on material that has been given a seam 60º, and test metalography (macro-etching) that aims to find out the structure of a macro on the area limitation Base Metal, HAZ (Heat Affected Zone), and Weld Metal. From the results obtained in test, radiography is obtained that the specimen with a filler that do not have a disability who soaked a little more (cluster porosity and porosity) and only occurs at two points instead of filler that is marinated for 30 minutes test (slug inclusion and porosity), 45 minutes (slug inclusion, porosity, and cluster porosity), and 60 minutes (slug inclusion and porosity). While in metalography, obtained by testing that the width of the HAZ in the filler without soaked has wider area (4,4mm) than the filler that is marinated for 30 minutes (3,93mm), 45 minutes (2,98mm), and 60 minutes (1,96mm).

Item Type: Thesis (Diploma)
Additional Information: RSMI 671.521 Dew a
Uncontrolled Keywords: SMAW Welding, Radiography, Macro-Etching, Welding Defects, Width of HAZ
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering)
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21401-(D3) Diploma 3
Depositing User: Bintang Putra Dewa
Date Deposited: 08 Feb 2018 07:33
Last Modified: 06 Mar 2019 04:20
URI: http://repository.its.ac.id/id/eprint/47117

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