![]() ![]() Second, keep up with correct travel speed and travel angle. Be sure to give adequate space in the weld joint for added passes, particularly, on the joints in need of multiple passes. Whatever causes of this problem, they can be averted with appropriate welding techniques.įirst, prevent wrong placement of weld bead, especially when making many passes on the thick metal sections. Slag inclusions eventuate when the slag produced by the molten flux in the wire core gets trapped inside the weld. In case worm tracking occurs, decrease your voltage by one half volt’s increments until you remove the problem. For the best, follow the recommended parameters by the manufacturer of filler metal for the particular diameter of welding wire. To avert worm tracking (also, marks on the weld bead’s surface as a consequence of gas created by the flux in the wire core), avoid immoderate voltage for the wire feed setting as well as amperage. Generally, the wire shouldn’t extend more than 1 ¼ inch beyond contact tip. After that, maintain a proper electrode stick-out or extension. Still, those products can’t replace appropriate pre-cleaning. You can also use filler metals with added de-oxidizers to prevent contaminated welds. For preventing porosity in welding, get rid of any grease, rust, oil, paint, coatings, dirt and moisture from the base metal before you weld. Porosity occurs when gas is trapped in the weld metal, and can appear along its full length or at any particular point of the weld.
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