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Welded Hard Points

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Mike D

04-09-2002 01:21:19




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I just got a Gannon scraper box set up for enscarfment tines,but the diggers are gone. I need 8 and my dealer wants almost three hundred for the set. Probably a fair price, but I have enough three quarter stock around to make them. But what do I do about the points? I could weld on some car leaf spring, or was thinking I could build up the teeth with my AC stick welder. What rod can be used to make hard points on mild steel? THANKS, Mike D

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Trucker

04-12-2002 23:39:03




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 Re: Welded Hard Points in reply to Mike D, 04-09-2002 01:21:19  
Its called hard surface rod,dont remember the number.You can ask a welding supply store for hard surface rod and Im sure they will know what you need.



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Nathan(GA)

04-10-2002 19:31:27




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 Re: Welded Hard Points in reply to Mike D, 04-09-2002 01:21:19  
Mark and Steve know more about this stuff than I do. But for what it's worth, I welded some hard plate pieces on my backhoe bucket teeth. The plate was believed to be T1 or something like that. I don't use it everyday, but so far they are holding up well. I even hit some rock with 'em. I welded the pieces with 7018.



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Steve U.S. Alloys

04-10-2002 14:42:44




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 Re: Welded Hard Points in reply to Mike D, 04-09-2002 01:21:19  
Mark gave you some good advice, as usual, Mike. There is another method as well. The carbon steel should provide a good cushion in itself because it is relatively soft. You could consider a WC overlay. That would be a one pass maximum application and yield a hardness of around 9 on the MOH scale. A less costly material would be a CrC but as with most of the common hard face materials, a 3 pass layer is required to achieve maximum hardness. You need to way the cost of single pass vs. 3 passes in time and material. The WC is also superior in regard to abrasive wear. The hardness of the WC approaches that of industrial diamonds.

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Mark Kw

04-09-2002 03:56:49




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 Re: Welded Hard Points in reply to Mike D, 04-09-2002 01:21:19  
I've had good results using Stoody nicro-mang rods over mild steel. Keep the amps down to just enough so that the rod does not stick, only slight penetration. Cover the entire wear area with this keeping the beads uniform and in the shape you want. Will be best if you run a short bead and beat with a large hammer while hot to help maintain shape, this step also helps put some work hardening into the manganese at the same time. Once you have the manganese base, you can run about any hardface rod over it for added wear protection. The manganese gives you a good impact resistance while the hardface will help keep the mang from wearing off from abrasion.

Don't know how well these rods will work on an AC machine, that's something you'll have to play with and see what happens.

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