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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Failure ...
I have decided to give up and admit those wood stove grates have defeated
me . I have done a lot of research in addition to the excellent advice y'all have given me and this just ain't happening . These grates have been repeatedly overheated in a high-carbon environment , and have apparently absorbed so much carbon as to render them unrepairable .. First I tried preheat to 500-600° F and TIG welding the cracks with both cast strips and with the Invar 42 . The problem is that the surface of the CI just ablates , it will not puddle . I did get some very small "beads" molten , but the filler would not fuse and puddle . Next was preheat and brazing rod , it refused to wet the surface and stick .. When I did get it to stick on some places , it cracked as the part cooled .. Today I tried some new brazing rod with preheat , same deal , it refuses to wet the surface . Since nothing else has worked I figured I had nothing to lose so fired up the MIG and tried a short bead with heavy peening as the weld cooled . And it won't stick either . I'm figuring that with nothing else working it's pretty much futile to try with stick . So tomorrow I get to call the guy and tell him the bad news ... but for some reason I don't think he's going to mind too much . The stove (I got to see it the other day when I delivered the other piece I repaired) is much older than mine , and has been cobbled on some before . And he's got another stove installed where he had this one ... I suspect he was kind of expecting these to be unrepairable , I pretty sure I'm not the first guy he's asked to fix them . The others apparently had the good sense to say no . -- Snag |
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