Weld Bead Geometry And Shape Factor
Weld penetration is generally considered to increase with the current. Penetration p reinforcement height h weld bead widthw weld penetration shape factor WPSF defined as the ratio of.
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Explore Weld bead geometry and shape factor
Weld bead shape 1.. Weld penetration shape factor WPSF is another term that provides the information about penetration pattern. The quality of the weld joints depends on the bead geometry and shape factors. Weld penetration shape factor WPSF is another term that provides the information about penetration pattern.
In this study effects of heat input and cooling rate on the weld bead shape-related parameters such as weld penetration shape factor WPSF and weld reinforcement form factor WRFF are studied during submerged arc welding SAW of high strength pipeline steel. Control of bead geometry and dilution is of utmost importance during overlay cladding. Figure 1 shows the transverse cross section of a weld bead geometry.
The weld joint is specified by the bead width height of reinforcement depth of penetration weld reinforcement form factor WRFF and weld penetration shape factor WPSF. It is a comparative measure of the transfer of energy per unit weld length. 1defined Weld Penetration Shape Factor as the ratio of the weld width to the penetration and also defined Weld Reinforce-ment Form Factor as the ratio of weld.
The bead geometry and shape to accomplish the desired mechanical properties of the weldment should be developed. Torch angle Ɵ and wire feed rate WFR on the weld bead geometry reinforcement height H depth of penetration P and bead width W. The bead geometry and the shape relationship are depicted in fig 1.
Quality of the weld bead depends mainly on the weld bead geometry and shape relationship Viz penetration weld width reinforcement dilution weld penetration shape factor WPSF and the weld reinforcement form factor WRFF. And on the shape relationships such as WPSF weld penetration shape factor WRFF weld reinforcement form factor and dilution. Bead on plate welds were carried out on mild steel plates to study the influence of welding current and arc voltage on weld bead geometry parameters.
Many high deposition arc welding processes are in use for cladding and surfacing for decades but dilution remains more or less a problem while using these processes. Heat input is very important term in context to the material thickness and is calculated using equation. The stress-number of cycles to failure SN curve and fatigue strength were obtained from the fatigue test for four types of weld bead.
The response factors namely bead penetration weld width reinforcement dilution weld penetration shape factor WPSF weld reinforcement form factor WRFF as affected by wire feed rate open circuit voltage nozzle-to-plate distance welding speed and work material thickness have been investigated and analyzed. Bead geometry is decided by its Width Reinforcement and Penetration depth. The weld bead coss-sections were metallographically investigated.
That the study of weld bead geometry dealt with the estimation of depth of pene-tration area of bead and dilution. They reported that the wire feed rate was the most significant parameter in reverse polarity that affect penetration and percentage dilution due to increased heat input to the base metal. Bead geometry is decided by its Width Reinforcement and Penetration depth.
During welding there are many factors which affect the bead geometry of weld metal out of which current electrode polarity electrode diameter and electrode extension primarily affect the bead width bead reinforcement and weld penetration. The bead geometry and shape relationship BG. Weld penetration shape factor WPSF is ratio of bead width W to penetration P which is calculated by equation.
It is vital to establish a relationship between process parameters and weld bead geometry to assess and control weld bead quality 2. The quality of cladded components depends on the weld bead geometry coefficients of shape of welds and dilution which have to be controlled. Many high deposition arc welding processes are in use for.
Main and interaction effects of the process variables on bead geometry and shape factors are presented in graphical form and using which not only the prediction of important weld bead dimensions. The effects of these welding parameters were evaluated by measuring penetration depth reinforcement height bead width wetting angle electrod deposit area and plate fusion area. As the current increases it results in setting up of the electromagnetic forces which cause the development of a plasma je.
Four types of weld beads with different shapes by factors such as length angle and area the welding process wire feeding speed and joint shape were changed. Optimum range of bead parameters and dilution are required for better economy and to ensure the desired mechanical and corrosion resistant properties of. The selected bead geometry parameters were bead width penetration reinforcement weld penetration shape factor WPSF and reinforcement form factor RFF.
A large number of experiments are to be conducted to predict the weld bead geometry and to develop the mathematical model. Introduction The bead geometry and shape relationships affect the load carrying capacity and number of passes needed to fill the groove of a joint Smati 1986. The mechanical strength of a weld can give good insights about the quality of the weld bead geometry which can be described by the Bead Width Height Reinforcement Weld Reinforcement Form Factor WRFF and Weld Penetration Size Factor WPSF.
Weld Penetration Shape Factor WP. Weld bead shape 1.
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