How do you get rid of welding defects?
Remedies:
- Increase current density.
- Reduce rapid cooling.
- Adjust the electrode angle.
- Remove any slag from the previous bead.
- Adjust the welding speed.
Can you weld front forks?
Yes, cracked fork can be welded, but yes, that is also asking for trouble. The crack is already a symptom that something is wrong.
What kind of defects should not be there in good welding?
Surface defects that impair welding quality
- Pits.
- Undercut.
- Overlap.
- Insufficient reinforcement.
- Surface cracking.
- Arc strike.
- Bead meandering (bent/misaligned bead)
- Remaining groove.
Why do my MIG welds look so bad?
Wire feed speed/amperage too low – An arrow, oftentimes convex bead with poor tie-in at the toes of the weld marks insufficient amperage. Travel speed too fast – A narrow convex bead with inadequate tie-in at the toes of the weld, insufficient penetration and an inconsistent weld bead are caused by traveling too fast.
How do I know if my weld is strong enough?
Welding Tests To really test a weld you need to do a x-ray test, magnaflux test, dye penetrant test or ultrasonic test which looks for voids, lack of fusion, etc.
Do you push or pull with a stick welder?
Push or pull: Here the rule is simple. “If it produces slag, you drag,” says Leisner. In other words, you drag the rod or wire when welding with a stick or flux-core wire welder. Otherwise, you push the wire with metal inert gas (MIG) welding.
Which welding defect is easiest to fix?
Underfill is probably the best welding discontinuity you could have. And that is simply because it is a quick and easy fix to make. All you have to do is finish filling the weld joint until it is flush or below the maximum allotted weld reinforcement depending on material and thickness.
Why did they not allow welding to the forks?
When it came to the forks we only allowed welding to attachment points using an approved procedure. We never changed the attachment design as this would require factory approval and testing. One reason for doing this was the forks were made from different materials, from 4140 on down. The forks were essentially considered an expendable item.
Can a forklift Fork be weld on the face?
NEVER weld on the face, or under any circumstance the INSIDE RADIUS of the HEEL. 5. Normally, never weld within half the diameter of the face. IE, 2″ thick forks can only have a 1″ weld on the sides. 6. Anything else causes soft spots and weakens the forks from their load rating.
What causes an undercut on a welding joint?
Wrong filler metal, excessive heat, fast weld speed, as well as poor welding technique, may all leads to undercut welding defect on a welding joint. Also, very high weld current, incorrect use of shielding gas and using the wrong electrode could cause undercuts.
What’s the best way to fix a welding problem?
Try to Develop a weld sequence to prevent localized overheating. On larger projects using heavy steel, preheating can also help in reducing weld distortion. Choose welding electrodes that offer a high weld speed and moderate penetration, this will assist in giving less shrinkage to the weld area.
When it came to the forks we only allowed welding to attachment points using an approved procedure. We never changed the attachment design as this would require factory approval and testing. One reason for doing this was the forks were made from different materials, from 4140 on down. The forks were essentially considered an expendable item.
Wrong filler metal, excessive heat, fast weld speed, as well as poor welding technique, may all leads to undercut welding defect on a welding joint. Also, very high weld current, incorrect use of shielding gas and using the wrong electrode could cause undercuts.
What should I do after welding a forklift?
After welding, what should be done to temper the welds? 1. Preheat to 600*F with a soft flame. 2. Postheat to 800-850*F with a soft flame. 3. Cool slowly. 4. NEVER weld on the face, or under any circumstance the INSIDE RADIUS of the HEEL. 5. Normally, never weld within half the diameter of the face.
Which is the most serious defect in welding?
Weld Cracks are the most serious type of welding defects. Weld Cracks are not acceptable in the welding industry. However, a crack may occur just about everywhere in a weld; in the weld metal, on the plate next to the weld metal, or anyplace affected by intense heat.