|
|
I am planning to use inverter TIG, with .020 dia. electrode (any smaller diameter available, I don't think so?), for filling in small pits in mild steel parts, pits are numerous, and are only about 1/8" diameter with similar depth, so should fill in easily. I plan to use rod of same steel composition as parts to be welded. Once welding is done, parts will be machined flush with milling machine, hand files, polishing cloth, etc. Naturally, I will have heat as low as possible. any suggestions for success and beautiful beads? If you have experience using the super small WP50 tig torch, how does that compare with a WP125 torch for such use of ultra small dia. electrodes?
Reply:If you're going to be machining/polishing after the fact, there's no need to use a micro torch or a tungsten that small. A standard torch and .040 tungsten are more than adequate to do that job. I've used just that for filling holes that were supposed to be blind holes that were 3/32" diameter or less.I prefer the WP125's over the air cooled alternatives if you had to use one or the other.
Reply:Originally Posted by jackI am planning to use inverter TIG, with .020 dia. electrode (any smaller diameter available, I don't think so?), for filling in small pits in mild steel parts, pits are numerous, and are only about 1/8" diameter with similar depth, so should fill in easily. I plan to use rod of same steel composition as parts to be welded. Once welding is done, parts will be machined flush with milling machine, hand files, polishing cloth, etc. Naturally, I will have heat as low as possible. any suggestions for success and beautiful beads? If you have experience using the super small WP50 tig torch, how does that compare with a WP125 torch for such use of ultra small dia. electrodes?
Reply:how thick is the material that the pits are in? unless it is super thin why not just use whatever tungsten is in your torch? your going to machine it afterwards so as long as their are no inclusions your are golden
Reply:Material being welded is large, say 3 inch x 4 inch, solid mild steel, BUT some areas are engraved, so I need to try to avoid those engraved areas, while filling small number of pits in areas not covered by engraving, thus, I need small torch, small electrode, small filler, for best results, I think?
Reply:How close together are the engraved areas? I still think you can do it with a .040 tungsten and regular torch. Arc length is going to be more important than tungsten size.
Reply:Use 3/32 tungsten and .045 diameter filler wire.Set amperage on machine at about 40 amps if you have a foot pedal, and about 1/3 of that with no foot pedal.I have TIG welded for 15 years and 6 hours per day.AWS certified welding inspectorAWS certified welder
Reply:I'm a Mold Welder, and I use 1/16 tungsten for most of the intricate welding I do. Including just portions of engraving where the letters are only .06. I use a WP-20 Torch and it's worked fine forever. The MT-125 is nice, but it's main use is for limited access areas. It's also expensive! The major PITA is the fact that for the WP-50, and the MT-125, you have to use short tungsten(1/2" or less) and it's a pain to grind. --------------------------John
Reply:Donald Branscome has tig welded for 15 years, 6 hours per day, and he still hasn't gotten it right.About the only thing that surprised me about his comment was that he didn't recommend that the OP use "pure" tungsten to get the job done.Syncro 250 DX Dynasty 200 DXMM 251 w/30A SG XMT 304 w/714 Feeder & Optima PulserHH187Dialarc 250 AC/DCHypertherm PM 1250Smith, Harris, Victor O/ASmith and Thermco Gas MixersAccess to a full fab shop with CNC Plasma, Water Jet, etc.
Reply:Nice to see you added something useful to the post Fire!, Fire! Oh wait, that's my torch...Lincoln PT-225 TIGLincoln 175 MIG |
|
发表于 2021-8-31 23:51:43