1 Jul Weld defects, causes, and remedies. 1. Weld Defects, Causes, and Remedies; 2. Objective: At the end of the lesson, you are expected to;. Causes and Cures of Common Welding defects. Welding Type worm hole. Defect : Blow Hole worm hole blow hole. Why. What to Do. SMAW. CO2/MAG. 1. Welding defects can greatly affect weld performance and longevity. of the various defects, their causes and remedies can help to ensure higher-quality and .

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It is occurs when the depth of the welded joint is insufficient. Reduce the gap between the weld joints by using reasonable defrcts joints. Improper welding angle and travel rate of welding rod.

Slag inclusion – Causes and Remedies

November 22, May 20, tvm 0 Comments. Using a proper technique for welding. This site uses Akismet to reduce spam. Porosity reduces the strength of a weld. Incomplete fusion occurs when the welder does not accurately weld the material and the metal pre solidifies which leads to a gap which is not filled with the molten metal.

Increasing the welding current decects decreasing the travel speed helps in removing the chances of incomplete fusion. One typical defect we have seen examples of recently is incomplete fusion. The effect of porosity on performance depends on quality, size and orientation to stresses. Using appropriate materials may decrease the chances of crack.

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Welding Defects : Types, Causes, Testing and Remedies – mech4study

In arc welds, it is caused by dissolved gases that are usually present in a molten weld metal. These defects occur only in the butt welds where the groove of the metal is not filled completely. Today we will learn about all types of welding defects.

Remmedies of improper size of the electrode 3.

It lends its self to mass produced parts, where sacrificing one or two component for testing is acceptable. This is mainly a problem with low quality steel.

In this defect, air bubbles or gases are present in the weld zone. Reducing the deposition rate. Slag is formed on the surface of the weld or between the welding turns. This causes a stress and then crack is formed. Proper selection of the electrode. Defects are common phenomenon in any manufacturing process.

Destructive testing is usually a cheaper method of inspection. This defect can be minimized by the proper selection or electrode, filler material, improve welding Technics, more attention to weld area during welding preparation and slower speed to allow gases time to escape.


Handbook – Weld Defects

Cold cracks can occur in both butt welds and fillet welds; however, this article will focus on those occurring in fillet welds. This is all weldibg welding defects types and testing.

Use a proper technique. Insufficient cleaning between multi-pass welds and incorrect electrode and current can leave slag and unfused section along the weld vauses. It can occur in weld metals and the heat-affected zone.

Rust or oil on the welding surface. Metals such as steel and aluminum at or near their melting temperatures diffuse hydrogen at a very high rate.

Welding Defects : Types, Causes, Testing and Remedies

Remove rust or oil from the surface defcts use a proper technique. When the weld face extends beyond the weld toe, then this defect occurs. It occurs because of the low heat input.