Follow up to adding filler metal to a worn tillage tool. Advice needed.

[sixdogs]

A while back I started a thread about adding hard facing to fill in the metal on a worn tillage tool. A grass slit seeder blade and I have 110 of them. Here's that thread http://www.tractorbynet.com/forums/...rding-hardfacing-edge-tillage.html?highlight=

Here are some pictures of one of the parts showing the worn metal with the piece overlaid on a tracing of an original blade. Is there some way I can maybe add a piece of metal to the edge and weld and fill in a bit? It doesn't exactly have to resemble the original drawing. The piece was hardened originally so is there some metal I could use that was tougher than plain steel? That's why I was thinking hard facing but there is too much metal missing.



Here's a close up showing the metal that is missing. I don't have to rebuild it all.





Here's the whole part.


I plan to take these to a local welding shop because I don't have the knowledge or experience to try it. I would be willing, however, if I thought I could do wht is needed. I have a Lincoln 170 MIG and if that's not enough I've been thinking of a bigger welder. Again, I don't need to add all the metal and even 1/4" or so would be helpful.

Anyway, what do you guys think on this? Any advice appreciated.

 

[Jesse masterson]

seems simple to me I'm no pro but I'd just build it up with 7018 lo hyrogen stick weld then grind off what is need to fit the need! 17018 is very hard!

 

[Shield Arc]

On the whole this could be very bad business! How many RPMs does this thing spin? If a knife came apart could anyone get hurt?

 

[Mark @ Everlast]

Brillion loves their money. You've got a tough one there. I don't think you could reasonably build them up. It would not be good a solution. Have you looked on the internet for aftermarket parts suppliers? Try here: Disc & Tillage

 

[CNC Dan]

On the whole this could be very bad business! How many RPMs does this thing spin? If a knife came apart could anyone get hurt?

Does that blade spin? I thought is was just dragged through the dirt. If it spins very fast, you need to think about what's going to happen if it cracks and breaks off. If it spins slow enough, it could be OK. If you can get a piece of copper about 1/4" thick you can clamp it under the blade and run beads allong the edge. The copper will suppport the weld metal on one side, acting as a crude mold. The weld will not stick to the copper, but you will need to cool it now and then.

 

[Shield Arc]

Well Dan you took my next post right out of my mouth!:laughing: Saved me a lot of typing!:thumbsup:

 

[Mark @ Everlast]

It's similar to a rotor tiller blade. I've used roto tillers up to 14 feet wide. They don't spin fast enough to cause a serious issue anyway you look at it. They break all the time...even not welded, and ones I've seen welded can and do survive...though not all. I'm just not sure about building them up that far. There shouldn't be much danger even at PTO speed...as the housing would absorb the blade, but if the break, they usually do it in the ground...and don't go very far if they go anywhere.

 

[Shield Arc]

So it's not like a lawn mower blade!

 

[Shield Arc]

I think I'd give it a shot. I have some copper for backing, but if you can't find any your local welding supply should have some ceramic backing. I'd give it a try with my Mig welder, and some L-56 wire.
ceramic backing material | Lincoln Electric

 

[gwdixon]

Wow. 110 of those things with that much build up (even .25") is going to take some time and material. The OP's machine ought to be able to handle it. He would be pretty good at the process by the time #110 was reached.

Some kind of backing is an excellent idea. I have carbon blocks but they are a bit expensive. Harbor Freight has copper welding spoons for around $10 that should work.

It also appears that those blades are fairly thin so a fair amount of grinding is going to have to be done to keep the knife perspective.

I'd wait for the welding shop estimate before going much more into it. The estimate is going to be shocking IMHO.