Hardfacing oxy/acetylene

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Does anyone have experience with Co1 or Co6 hardfacing? When torch brazing these alloys, does one use some sort of flux (like with general brazing). Borax perhaps? Very difficult to find people with experience at the local welding shops.
Reply:Let me rephrase that. Experience with Stoody1 and Stoody6 or like product?
Reply:I have used some Stoody products but not those and I wouldn't remember all the details offhand; in any case, I'd suggest going to the manufacturer to get the best information. For example, for Stoodite 1, this is what the sales literature says:http://www.thermadyne.com/IM_Uploads..._33_Coe001.pdf "DESCRIPTIONStoodite® 1 is the highest hardness standard Stoodite® alloy in the group of cobalt alloys used for elevated temperature abrasive wear associated with corrosion. Deposits of this alloy have a large volume of chromium carbides that impart outstanding abrasive wear resistance. The addition of tungsten enhances high temperature hardness and matrix..." This is followed by lots of other data.To get other technical information, pick from this list:http://www.thermadyne.com/stoody/res...y&categoryID=2
Reply:Thanks for the info. I can't seem to get the stuff to lay down. It doesn't seem to flow real well.
Reply:It is my understanding that most hardfacing materials don't lay well, and that is the way that it is meant to be.  You don't want to dilute the filler metal too much or you lose the hardness properties.Maybe pictures of the results would be beneficial.
Reply:I have used quite a bit of the stoodite 12 and stellite 12, which are pretty much the same thing. You don't use any flux with them. These bare rods don't flow freely, and as a result, the beads can be stacked very nicely when building up worn edges. I found that TIG welding offers a lot more control than oxyacetylene. Preheating and slow cooling are important to minimize stress cracking. You can stick weld as well if you want a thinner overlay, but you don't obtain the same degree of hardness with the first pass, and the coated rods are also more expensive. I have used the bare rods as large as 1/4", and with practice, you can apply it very evenly, especially when using TIG.
Reply:Both the cobalt and nickel/chrome hardfacing alloys are sluggish. Most people starting out in this do better with the torch. With tig it's easier to mix alloy with parent metal if your not careful.You can get pretty specific instructions by calling the maker. It's also wise to talk to the maker about what your doing with it, about 20-25 years ago a lot of stuff that was done with Stellite1&6 for years changed to Nickle/Chrome/Boron (similar price but safer/easier and lasted longer on things like extruder screws).Good LuckMatt
Reply:Thank you for all of your suggestions. I will try to get a photo up.
Reply:If you are wanting a thin overlay, thermal spray welding is what I find to work the best. If you have enough work to justify purchasing a spray torch, they can be quite versatile, not just for hardfacing. Like Matt said, stellite gas welding rods aren't used much these days, and depemding on your application, there are harder products out there.
Reply:When I was still riding short track (Motorcycle)  I had a hot shoe that was made by a guy named Ken Maley (dead now )  and Ken was the Hot Shoe man for years....The guy was awesome at applying hard facing with a torch.....He would do it for you at thetrack....I remember watching him apply the hardfacing rod (Bars  like solder)  was an art that not too many people could do.....http://www.flattrack.com/index.php?o...95083&catid=34  Miller Dynasty 350Twenty Six HammersThree Crow BarsBig Rock
Reply:Originally Posted by Pro-FabIf you are wanting a thin overlay, thermal spray welding is what I find to work the best. If you have enough work to justify purchasing a spray torch, they can be quite versatile, not just for hardfacing. Like Matt said, stellite gas welding rods aren't used much these days, and depemding on your application, there are harder products out there.
Reply:Originally Posted by jad285So the stellite rods aren't used much anymore? What has the industry changed to?
Reply:Originally Posted by Matt_MaguireMostly Nickel Chrome Boron with other pixie dusts in it,as long as the application doesn't see very high temperatures.Stellite is still used a lot if the application requires high hardness, resistance to erosion or galling at high temperatures. It is the best solution for steam valve faces (except nuclear applications). It is also cast for use in a lot of things out there.Matt
Reply:Originally Posted by jad285Thanks for all of your replies. Anyone know of a decent hardface shop/individual in N. Cali?
Reply:Originally Posted by jad285Thanks for all of your replies. Anyone know of a decent hardface shop/individual in N. Cali?
Reply:Originally Posted by bravofabit depends where you are but the only pace ive ever seen torched on hardface came from a buddy of mine who runs an auger building company. it was neat stuff with chunks of carbibe in it we use to line core barrels. you may want to give him a call @ DESCO in richmond CA  names Ron