In this study, Submerged Arc Welding (SAW) and Gas Metal (GMAW) processes were used in multi-pass welding of 33 mm thickness super duplex stainless steel plates. Recommended higher than recommended arc energy interpass temperatures used. Both GMAW SAW able to produce large weldments meeting the microstructural, mechanical, corrosion resistance requirements, also when using temperature. It was p...

Bu çalışmada paslanmaz çeliklerin pulse (P-GMAW) ve double (DP-GMAW) kullanılarak gazaltı MIG (Metal Inert Gas) yöntemi ile birleştirilmesi araştırılmıştır. Kaynaklı birleştirilmelerin mekanik özelliklerini belirlemek için sertlik ölçümü, çekme deneyi mikroyapıda oluşan değişiklikleri tespit etmek amacıyla mikroyapı çalışmaları incelenmiştir bu testler sonucunda kaynak yönteminin diğer yöntemle...

This study aims to propose a new diagnosis technique based on the Park’s vector and polar coordinates of electric currents for detection location open-circuit faults (OC) at level two rectifiers connected grid network feed Gas Metal Arc Welding process (GMAW). allows early faulty switches (Thyristors) overcome negative effect welding current, voltage, droplet diameter. For that, reconfigurable ...

A method has been proposed to pulsate current in gas metal arc welding (GMAW) to achieve a specific type of desirable and repeatable metal transfer mode, i.e., one drop per pulse (ODPP) mode. This method uses a peak current lower than the transition current to prevent accidental detachment and takes advantage of the downward momentum of the droplet oscillation to enhance the detachment. A numer...

In the magnetically controlled Plasma-GMAW welding process, composite arc forms a keyhole in workpiece to be welded. order explore effect of process parameters on coupling, weld pool and keyhole, behavior characteristics side information were collected using acquisition system high-speed camera during bead-on-plate welding. The image is processed by pseudo-color enhancement technology, molten a...

This paper investigates the dynamic behavior of Gas Metal Arc Welding (GMAW) process for two types of power supplies –inverter and rectifier- for short circuit transfer mode. The large ripples on the rectifier power source are able to perturb the metal transfer mode. In this experimental work some operating points in the short circuit mode have been selected using an automatic pipeline welding ...