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All Journal Journal of Welding Technology Jurnal Teknologi Maritim
Kamilah, Nadhifatul
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Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Comparative analysis of electrode, preheat, and interpass combination in dissimilar GMAW welding of bisalloy 400 steel and SM490YA material on hardness and micro structure Munir, Moh. Miftachul; Kusminah, Imah Luluk; Kamilah, Nadhifatul
Journal of Welding Technology Vol 6, No 2 (2024): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v6i2.5942

Abstract

A construction company produced a side-dump type trailer used to transport coal, but it suffered damage in the form of cracks in the welding joints on the floor. The weld joint uses two different materials, Bissalloy 400 and SM490YA steel. This study aims to analyze the damage and repair it using appropriate electrodes, preheating, and interpass temperature, which affect the hardness and microstructure of both materials. The hardness test results showed that the highest value reached 385 HVN. Increasing the preheat and interpass temperatures was found to decrease the material's hardness. Microstructure analysis revealed phase changes in the weld metal, including mixing of martensite phase, ferrite phase, and pearlite phase. The use of a buffer layer between dissimilar materials proved effective in reducing the risk of cracking and deformation. This research confirms the importance of selecting appropriate welding parameters to improve joint quality in materials with significant carbon equivalent differences.
Analisis Perbandingan Kombinasi Elektroda, Preheat, dan Interpass Pada Pengelasan GMAW Dissimilar Baja Bisalloy 400 Dengan Material SM 490 YA Terhadap Tekuk dan Makro Kamilah, Nadhifatul; Munir, Miftachul; Kusminah, Imah Luluk
Jurnal Teknologi Maritim Vol. 7 No. 2 (2024): Jurnal Teknologi Maritim
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35991/jtm.v7i2.38

Abstract

Sebuah perusahaan konstruksi memproduksi side dump trailer yang digunakan untuk mengangkut batu bara. Trailer ini mengalami kegagalan berupa retakan pada sambungan las di bagian lantainya. Sambungan las tersebut menggunakan material berbeda, yaitu baja Bisalloy 400 dan SM490YA. Penelitian ini bertujuan untuk menganalisis kegagalan tersebut dan memperbaikinya dengan mengkombinasikan elektroda, preheat, dan interpass guna meningkatkan sifat mekanis dan metalografi pada material baja Bisalloy 400 dan SM490YA. Pengujian tekuk dan makro dilakukan untuk mengetahui sifat mekanis dan metalografinya. Hasil pengujian tekuk menunjukkan bahwa hanya dua dari enam spesimen yang memenuhi kriteria keberterimaan, sementara empat lainnya memiliki diskontinuitas terbuka yang melebihi batas 3 mm. Analisis Makro menunjukkan kualitas hasil las pada setiap spesimen yang diuji. Penampang logam las pada variasi arus 80A menunjukkan adanya slag, namun semua hasil pengelasan tidak menunjukkan incomplete fusion. Katakunci: Bisalloy 400, Buffer Layer, GMAW, Interpass, Preheat
Co-Authors Kusminah, Imah Luluk Miftachul Munir Munir, Moh. Miftachul