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How can you tell the difference between good and bad welding?

FAQs william October 27, 2022

Indications of a good oxyfuel weld are a consistent seam with no holes or globules of molten metal. A poor quality oxy-weld will have holes and will not be uniform. You will also notice insufficient penetration of the workpieces. Also, there may be large chunks of molten metal on and around the weld.

How can you tell if a weld is bad?

Indications of a poor weld include: Burning out, no filler metal used, wide flat bead with no clear bead pattern, irregular bead, tungsten inclusion, porosity and/or undercut.

What are the qualities of a good weld?

The basic weld quality conditions to achieve such high quality products include the following: No cracks or holes found in the bead. The bead has uniform waves, width and height. The finished product meets the design dimensions and shows almost no deformation.

Can you weld over a bad weld?

Yes, you can weld over an existing weld… but many factors go into if you want it to be successful.

How much does a welder make?

According to PayScale, welders make an average salary of about $48,000 per year or $22.17 per hour, while welders working on construction sites make about $54,000 per year or $24.97 per hour earn.

What do bad MIG welds look like?

Poor MIG welding:

Contains visible defects such as cracks or holes. Lack of evenness and straightness. The weld bead/size is excessively small and thin or large and thick. Visible spatter that is difficult to remove.

What causes bad welding?

Welding defects are often caused by improper technique or parameters, e.g. B. poor inert gas coverage or incorrect driving speeds.

How can I make my welds look good?

Welding defects are often caused by improper technique or parameters, e.g. B. poor inert gas coverage or incorrect driving speeds.

What not to do after welding?

Do you push or pull when welding?

Push or pull: The rule here is simple. “If it produces slag, you drag,” says Leisner. In other words, you pull the rod or wire when welding with a stick or cored wire welder. Otherwise, slide the wire with Metal Inert Gas Welding (MIG).

Why am I getting holes in my welds?

Porosity is caused by the absorption of hydrogen, oxygen, nitrogen or impurities trapped in the weld pool. One reason for this could be a lack of gas shielding, since the contaminants from the atmosphere can penetrate the weld pool and create pinholes in the solidified weld.

How do you analyze a weld?

To estimate weld strength: Multiply the size of the weld and the weld strength. Divide the maximum allowable tensile stress by the product above. Multiply the result with 0.707 to get the length of the weld.

What type of welding is strongest?

TIG welding is often considered the strongest weld because it generates extreme heat and the slow cooling rate results in high tensile strength and ductility. MIG is also an excellent candidate for the strongest type of weld as it can create a strong bond.

What is the most important being a good welder?

Good communication and teamwork skills

It is important to be a reliable worker, to communicate when you have questions, to help others on your team to manage your time wisely and to work well with others. Building these skills is sure to make you a valuable asset to any welding team.

How many times can a weld be re welded?

For the Cr-Mo steels, up to two post-welds can be performed, but the post-weld heat treatment operations and the possible consequent deterioration of the welded joint must be taken into account.

How long should you wait after welding?

A waiting time of 24h to 48h to detect delayed cracking before final testing should be required.

Can you weld too hot?

You will undercut at the toes of the weld and the weld puddle will be too hot to control and will usually be crowned in the middle. Another clue is if you burn a rod down about 3 inches and your rod welder glows red, you’re too hot.

What is the hardest metal to weld?

What type of metal is the most difficult to weld? Titan is probably the hardest. It must be surrounded by an inert gas such as argon.

References:

  1. https://waterwelders.com/good-weld-vs-bad-weld/
  2. https://fsw-denver.com/how-to-spot-a-good-weld-vs-a-bad-weld/
  3. http://www.valleybox.com/material-handling-equipment-blog/how-to-spot-a-good-weld-vs-bad-weld-custom-metal-fabricated-products
  4. https://www.keyence.com/ss/products/measure/welding/trouble/quality.jsp
  5. https://app.aws.org/forum/topic_show.pl?tid=23111
  6. https://waterwelders.com/how-much-do-welders-make/
  7. https://finemetalworking.com/good-weld-vs-bad-weld
  8. https://www.millerwelds.com/resources/article-library/troubleshooting-weld-defects
  9. https://www.youtube.com/watch?v=CeQaHrvVJzc
  10. https://www.safetycompany.com/safetyblog/5-things-not-to-do-when-welding/
  11. https://www.agriculture.com/machinery/tools/welding/key-rules-on-welding-gle-direction_245-ar49501
  12. https://unimig.com.au/how-to-fix-pin-holes-in-your-welds/
  13. https://www.omnicalculator.com/construction/welding
  14. https://kanyanaengineering.com.au/different-types-of-welding/
  15. https://vernlewis.com/skills-needed-to-be-a-good-welder/
  16. https://www.twi-global.com/technical-knowledge/faqs/faq-how-many-times-can-a-weld-be-re-welded
  17. https://www.ndt.net/forum/thread.php?msgID=66058
  18. https://www.weldingtipsandtricks.com/stick-welding-question.html
  19. https://www.quora.com/Which-metal-titanium-beryllium-etc-or-alloy-is-the-most-difficult-to-weld

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