Hexavalent chromium [Cr(VI)] and ozone are produced in many arc-welding processes. Cr(VI) is formed when welding with chromium-containing alloys and is a suspected carcinogen. Ozone is formed by the action of ultraviolet light from the arc on oxygen and can cause severe irritation to the eyes and mucous membranes. Previous work has demonstrated that reduction of sodium and potassium in manual m...

The various welding parameters such as welding speed, voltage and gas flow rate were varied on HSLA steel and the effects of these parameters on weld bead geometry such as penetration, width & height have been studied. Mathematical equations have been developed using factorial technique. And the result of various effects are shown in tables. (Numerical Values). INTRODUCTION Wide variety of stee...

Weld area and weld depth/width ratio can be considered to be of the most important geometrical factors in pulsed laser welding. The effects of carbon dioxide and oxygen additions to the argon shielding gas on the weld properties in pulsed laser welding of low carbon steel is investigated. Presence of carbon dioxide and oxygen up to 10 and 15 percent respectively decreases the weld geometrical f...

Abstract. It is possible to assess the thermal efficiency of welding shielding gases by means of the arc temperature field analysis. Since this approach opens a remarkable study field to assess different shielding gases, giving support for dealing with advantages and disadvantages of commercial gas mixtures, there is a research line under development, which goal is to find techniques to measure...

This study investigated the joint properties of Fe-Pt alloy laser-welded to Co-Cr alloy. Cast plates (0.5 x 3.0 x 10 mm) were prepared with Fe-Pt and Co-Cr alloys. Fe-Pt plates were butted against Co-Cr plates and laser-welded using Nd:YAG laser. Control and homogeneously welded specimens were also prepared. Laser welding was performed with and without argon shielding. Tensile testing was condu...

A more contemporary variation of the friction welding procedure, stud welding, is promising for military, space, automotive and naval applications. The joining steel/aluminium matrix composite joints has been crucial in many these In all applications, strength dissimilar joint a critical consideration. Heat-affected zones arise because heterogeneous temperature distribution change thermal chara...

In the work influence of thermal limiters on formation a dendritic structure stainless steel AISI 304L layer deposited by electric arc welding in argon medium was investigated. The billets investigated mode differential interference contrast. analysis obtained structures showed that use form graphite skids allows to obtain uniform without sharp transitions between layers.

In mechanized or automatic GMAW welding, when necessary, weaving is usually performed by mechanical devices. On the other hand, magnetic fields are commonly used for same purpose in GTA welding. Experiments were carried out using with short-circuit, and pulsed metal transfer which controlled oscillation was applied. A clear influence of imposed field on process stability observed, its effect as...