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Struktur Mikro Las Baja C-Mn Hasil Pengelasan Busur Terendam Dengan Variasi Masukan Panas

Abstract

This research aims to study the effect of heat input of submerged arc welding on the microstructure of weld metal made from C-Mn steel. The study focused on the formation of acicular ferrite which could improve weld mechanical properties. The welding process was carried out using various heat inputs, i.e. 3.99 kJ/mm, 3.19 kJ/mm, 2.12 kJ/mm, and 1.77 kJ/mm. Microstructural examinations were performed using optical microscope and scanning electron microscope (SEM). Results show that the weld metal welded with heat input 2.12 kJ/mm produces more acicular ferrite than grain boundary and Widmanstatten ferrite. It is evident that this acicular ferrite nucleates on inclusions in the forms of SiO2, TiO, and Al2O3

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    Last time updated on 18/10/2017