The crack generally is directed down into the base metal, right at the weld toe. If you don’t create a smooth transition of weld metal to base metal, you can disrupt the flow of forces through the weld. Such a high volume of weld metal creates significant shrinkage forces. When these forces exceed the strength of the weld, cracking ensues. Grind the outside of the crack down to sound metal (about 1/2 the thickness of the base metal). Extend the excavation at least 1/2 inch beyond the visible crack tip. Weld the excavation from the outside. You should now have a complete joint penetration weld that is as strong as the original member (assuming it is low/medium carbon steel).
Welding Cracks In Steel
- ↑http://www.usaweld.com/Learn-How-to-MIG-Weld-s/416.htm
- ↑http://www.globalspec.com/learnmore/manufacturing_process_equipment/safety_personal_protective_equipment/welding_gloves
- ↑http://www.realworldsurvivor.com/2015/01/16/welding-workshop-stick-welding-beginners/#tim-reed-04
- ↑https://www.ccohs.ca/oshanswers/safety_haz/welding/ventilation.html
- ↑https://garage.eastwood.com/eastwood-chatter/how-to-prep-metal-for-welding-quick-tip/
- ↑https://garage.eastwood.com/eastwood-chatter/how-to-prep-metal-for-welding-quick-tip/
- ↑http://www.weldingtipsandtricks.com/how-to-mig-weld.html
- ↑http://www.lincolnelectric.com/en-us/support/process-and-theory/pages/grounding-safety-detail.aspx
- ↑http://www.mig-welding.co.uk/learning-mig.htm
- ↑http://www.mig-welding.co.uk/learning-mig.htm
- ↑https://www.youtube.com/watch?v=jtlOOOTpZYM&feature=youtu.be&t=1m34s
- ↑http://weldingproductivity.com/article/ac-vs-dc/
- ↑http://www.realworldsurvivor.com/2015/01/16/welding-workshop-stick-welding-beginners/#tim-reed-04
- ↑https://www.youtube.com/watch?v=NjYPJ-CxxW4&feature=youtu.be&t=3m42s
- ↑https://www.youtube.com/watch?v=NjYPJ-CxxW4&feature=youtu.be&t=5m20s
- ↑http://www.realworldsurvivor.com/2015/01/16/welding-workshop-stick-welding-beginners/#tim-reed-04
- ↑https://www.youtube.com/watch?v=NjYPJ-CxxW4&feature=youtu.be&t=6m27s
- ↑https://www.youtube.com/watch?v=NjYPJ-CxxW4&feature=youtu.be&t=7m9s
- ↑https://www.youtube.com/watch?v=NjYPJ-CxxW4&feature=youtu.be&t=7m42s