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Alright i know this is kind of similar to a lot of other threads already on here but I searched for an hour or so and couldn't find an answer. I've been welding pipe for a few years now and regularly work with 316, 309, and 308 pipe, all sizes and wall thicknesses. Unfortunatly, I haven't brazed a damn thing since I was in school years ago, and only did it for a few weeks when I was there. The scope of my knowledge only includes stainless, carbon, inconel, and chromalloy, but I have an idea for an art project at home and I'm kind of stuck.When we were in school we O/A brazed little pieces of 16 G carbon steel sheet with a wire that was gold in color, and had a manually-applied powder flux; it looked smooth and the color of shiny, bright brass arfter being melted. The project I want to tackle involves notching and twisting 1" 309 plate around a steel table leg (among other things) and I think it would look really nice if I could get the same wire to fuse the stainless to the leg.I'm kind of lost as to how to proceed with the welding, however, as I'm pretty sure O/A isn't going to be real pretty on stainless, and I'd like to leave a natural meal finish rather than painting it. I don't care whether it's welded or brazed, but I'm just wondering if there might be another alternative to get the same effect, or if I could get them to fuse together without getting an alloy that'll crack in a week.I know my description might be a little confusing, so if you fellas can get through it, any tips would be greatly appreciated.
Reply:All I got from that is you know how to weld, and you have a piece of 1" stainless (Im assuming 1" wide thin sheet, not 1" thick plate) You want a "real" metal finish, and dont think O/A welding will give you that.Your right, that was incredibly confusing. What exactly are you trying to do, and what are the results you need? Is there any reason you cant/dont want to weld this? Is it SS to MS or SS to SS or SS to...?What is a natural metal finish in your minds eye? Nice color bands on stainless? Rusted/weathered?Have we all gone mad?
Reply:You used plain brazing rod and probably brazo flux in school. if you want a similar effect you can get plain rod, or precoated rod at the dealer. the colors you get around the leg will depend on if you use a brush on anti oxidation coating, and your heat source. I have seen brazing done with carbon arc, oxygas, and tig. I would recomend oxypropane the standard acetylene regulator will fit a 20 lb propane tank and the flame is a little cooler and softer. Use standard welding tips. Heat control is the key, it only gets a hot as you let it. The standard flux was borax based, some folks would make up a borax and chalk or lime (masons lime) slurry with alcohol and brush it on and let it dry to prevent oxidation to the sides of the joint. (gunsmiths and tinworkers trick) Since this is ornamental , not structural, you have your choice of standard brazing rod, silver solders or special solders for stainless. Try a few test pieces first to get the hang of it. You could even just tig it with SS wire. or mig it with standard E70 You aren't worried about strength or corrosion so to carbon to SS will be fine. High tech would be to use a glovebox or bag, argon flood and tig with brass or SS.past work toys; lathes,mills, drills, saws, robots, lasers ironworker, shears, brake, press, grinders, tensile tester, torches, tigs, migs, sticks, platten table, positioner, plasmas , gleeble and spot. Retired June 30, 2009.
Reply:many bumps to wes for being able to get through my rambling question and for a thorough answer. bonus question: with the borax, alcohol and lime (or or chalk) mixture, are you saying to brush that on after the weld or to use that as the flux?
Reply:Originally Posted by turnNburnmany bumps to wes for being able to get through my rambling question and for a thorough answer. bonus question: with the borax, alcohol and lime (or or chalk) mixture, are you saying to brush that on after the weld or to use that as the flux? |
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发表于 2021-9-1 00:41:23