Investigation of Changes in Mechanical Properties and Microstructures of Mild Steel Joint by Oxy-Hydrogen Welding

Issues » Volume 36, Issue 11

H. Ates$^{1}$, M. E. Cakir$^{2}$, A. Kurt$^{1}$, I. Uygur$^{3}$, M. Turker$^{1}$

$^{1}$Gazi University, Faculty of Technology, Department of Materials and Metallurgy, 06500 Ankara, Turkey
$^{2}$Industrial High School of Golbasi, Haymana Caddesi 275, Ankara, Turkey
$^{3}$Düzce University, Department of Mechanical Engineering, Faculty of Engineering, 81620 Düzce, Turkey

Received: 12.03.2014; final version - 01.04.2014. Download: PDF

In this paper, in order to see weldability behaviour of mild steels joint by the oxy-hydrogen welding technique, an investigation of changes in mechanical properties and microstructures of mild steel is carried out. The specimens with 1.5 mm thickness and 125 mm length are welded by using both the oxyhydrogen and oxy-acetylene gases. Microstructural analysis is carried out on the cross sectional area of the welding zone in order to compare the changes in weld metals and the heat affected zones in terms of the welding gases. Experimental results of the tensile strength and microhardness obtained with mechanical tests show that samples welded with oxy-acetylene exhibited 10% higher yield strength than that of the samples welded with oxy-hydrogen. However, the oxy-hydrogen welding technique can be used as an alternative to the oxy-acetylene welding, since it has advantageous of being clean and economic.

Key words: microstructure, tensile strength, microhardness, mild steel, oxy-hydrogen.

URL: http://mfint.imp.kiev.ua/en/abstract/v36/i11/1561.html

DOI: https://doi.org/10.15407/mfint.36.11.1561

PACS: 06.60.Vz, 62.20.fg, 62.20.Qp, 81.20.Vj, 81.40.Jj, 81.40.Np, 81.70.Bt

Citation: H. Ates, M. E. Cakir, A. Kurt, I. Uygur, and M. Turker, Investigation of Changes in Mechanical Properties and Microstructures of Mild Steel Joint by Oxy-Hydrogen Welding, Metallofiz. Noveishie Tekhnol., 36, No. 11: 1561—1569 (2014)

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