Content tagged with "preheating"
Results: 4
Article
March 1, 2010
Beyond low-carbon steel
Figure 1 Certain alloys, such as the high-carbon steel used in this caster roll, require sufficient preheat, which slows cooling after welding and helps prevent cracking. The economy has pushed fabricators to adapt, market themselves to bring in new work, and even pursue untapped... Read more...
Article
December 1, 2009
Induction system speeds pipe welding projects
When it comes to pre- and postweld heat treatment, many fabricators see it as a choice between resistance heating with ceramic heating elements or flame heating with weed burners. However, they have another option: noncontact heating with an induction heating system. One such fabricator... Read more...
Article
May 8, 2007
Arc Welding 101
I am building a 400-gallon paint tank and I'm having trouble with leaks when using gas metal arc welding (GMAW). I'm using a welding machine running on 440. My best results come when running hot 19.5 on the heat and about 21/2 on wire speed. I am using a trimix gas and 0.035-inch 308 wire.... Read more...
Article
February 13, 2007
Arc Welding 101 - Preheating a shaft-sprocket assembly
We are welding 1018 cold-rolled, 2.5-inch-diameter shaft to a sprocket made from 1045 steel. We preheat the shafts to about 200 to 250 degrees. We are having some failure of the shaft, and I'm wondering what the proper procedure is for welding the assembly together. The sprockets are welded... Read more...
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