Difference between revisions of "welding"
From Noah.org
Jump to navigationJump to searchm |
m |
||
| Line 3: | Line 3: | ||
;Globular: feed wire never touches the motion metal pool. The feed wire melts in the plasma above the molten poll. A single, large droplet of metal collects at the tip which eventually drops into the molten pool. This requires less power than Spray Transfer, but the quality and penetration is not as good. The droplet size is irregular and the position it falls into the molten pool will vary from the center. | ;Globular: feed wire never touches the motion metal pool. The feed wire melts in the plasma above the molten poll. A single, large droplet of metal collects at the tip which eventually drops into the molten pool. This requires less power than Spray Transfer, but the quality and penetration is not as good. The droplet size is irregular and the position it falls into the molten pool will vary from the center. | ||
;Spray Transfer: feed wire never touches the molten metal pool. The feed wire melts in the plasma above the molten pool. The magnetic field pulls the droplets off the feed wire as a fine spray. Requires higher power giving more heat and a larger pool. | ;Spray Transfer: feed wire never touches the molten metal pool. The feed wire melts in the plasma above the molten pool. The magnetic field pulls the droplets off the feed wire as a fine spray. Requires higher power giving more heat and a larger pool. | ||
| + | |||
| + | == welding stainless to mild steel or iron == | ||
| + | |||
| + | This is pretty easy. There is nothing special you need to do. Use regular Argon/CO2 70/30 shielding gas and steel wire. I do this mostly for welding fasteners to steel pipes. I've also filled holes in stainless containers (I didn't have pure Argon or stainless wire). The welds, of course, are not stainless, but welds are good and strong. The heat doesn't seem to depassivate the fasteners. | ||
== websites with welding info == | == websites with welding info == | ||
Revision as of 18:05, 11 December 2012
- SCT
- Short Circuit Transfer - feed wire touches molten metal pool, which kills the plasma arc. The surface tension of the molten pool pulls away from the feed wire, which restates the plasma arc. The cycle then repeats.
- Globular
- feed wire never touches the motion metal pool. The feed wire melts in the plasma above the molten poll. A single, large droplet of metal collects at the tip which eventually drops into the molten pool. This requires less power than Spray Transfer, but the quality and penetration is not as good. The droplet size is irregular and the position it falls into the molten pool will vary from the center.
- Spray Transfer
- feed wire never touches the molten metal pool. The feed wire melts in the plasma above the molten pool. The magnetic field pulls the droplets off the feed wire as a fine spray. Requires higher power giving more heat and a larger pool.
welding stainless to mild steel or iron
This is pretty easy. There is nothing special you need to do. Use regular Argon/CO2 70/30 shielding gas and steel wire. I do this mostly for welding fasteners to steel pipes. I've also filled holes in stainless containers (I didn't have pure Argon or stainless wire). The welds, of course, are not stainless, but welds are good and strong. The heat doesn't seem to depassivate the fasteners.
