Craft · 6 pages · 12 min
How welding melts a joint
Welding melts the edges so they freeze as one piece of metal instead of a glued seam.
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From the opening
Welding joins metal by melting the edges of the pieces, usually along with a filler rod or wire, so the liquids mix in one pool. When that pool freezes, the joint is continuous metal rather than an adhesive line, which is why a sound weld belongs to both pieces at once. The opening covers the base metal itself melts, filler joins one shared pool, and gas or flux shuts air out.
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Inside
- The base metal itself melts
- Filler joins one shared pool
- Gas or flux shuts air out
- A cold bead never fused
- Where the idea stops applying
- A distinction worth keeping
Sources
- Fusion welding and the weld pool
- Shielding gas and flux in arc welding