The Investigation Of MIG Welding Parameter Effects On Welding Of Dissimilar Metal (Stainless Steel To Cast Iron)

Erni Zahani, Buyong (2005) The Investigation Of MIG Welding Parameter Effects On Welding Of Dissimilar Metal (Stainless Steel To Cast Iron). Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Experimental project to combine different metals (martensitic custom 450 SS to white cast iron) welded using metal inert gas welding or MIG. The reason of this experimental project is done is to examine the effect of the MIG weld towards the combination of different metals. The research 's objective is to prove that stainless steel can and will combine with cast iron with welding process based on the condition made from theory. other that look into the congruently, and die strength of the weld and the driving force between these different metals. The goal of this research is if there are perfect fit and congruently in the combination, it will make way to a more effective research and could be application in different industries mostly in vehicle construction sector. This MIG welding will be using robot with the help of two different fiJler wire as a variable that is stainless steel and mild steel. The speed of welding by the robot is constant at 30 cm/m. The voltage of the welding also constant at 19.9 volt. Power that is being used when welding is made into a variable that can be set at 3 stages that are 120 Amp, 150 Amp and 170 Amp. Two types of welding joint that has chosen as variable are butt joint and lab joint The location of the end of the robot's nozzle while welding is set for lab joint at 60° while for butt joint is set at 25° angle. The size of every material have a dimension of length x width x thickness (140 mm x 140 mm x 3mm) and will be held onto the table with G-vice when welded. The sample for lab testing was cutted into small size with dimension of length x width as 20 mm x 70 mm (butt joint) and 20 mm x 90 mm (lap joint) after welding done. Tests that will conducted after the welding are, mechanical test as tensile test, morphological observation to investigated weld fracture zone after performing the tensile test by using SEM and physical test as hardness test. The finding from this research project is achieving the objective that is stainless steel and cast iron can merged together using chosen filler metal and getting value reading of tensile strength for every joint following a determined parameter also the sample hardness on the welding surfaces zone can determine.

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