We have been hardfacing on 1" thick carbon with 5/32 stellite 6 cobalt alloy.
Have a lot more material to be over-layed, So I have been trying to get the consistency and welding characteristics down.
Does anyone on here have any experience with these rods? They seem like a fast-fill rod...? I find it quite hard to manipulate the weld puddle because of the fluidity. The best I can do is keep a sufficient drag angle, looking in front of the rod rather than the puddle.
Keeping the preheat above 300 F seems to help, but still getting some pinholes ( is it inevitable?) Keeping it hot helps a lot with the restarts, but still randomly pinholes.
Maybe someone can chime in how these rods are professionally laid out? I will try to get a pic
hacadacalopolis
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- weldin mike 27
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I have heard that some hard facing rods need a long arc length. Not sure if this applies to you
hacadacalopolis
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Amperage seems to really have an effect on puddle control. But pin holing (porosity) is hard to get rid of.
hacadacalopolis
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Ok so are these hardfacing alloys ok with a crossways crack?
Came in next morning and as I continued to overlay next set of flats I heard some tings.
The cracks are generally at the restarts and are about 1" length just perpendicular.
Came in next morning and as I continued to overlay next set of flats I heard some tings.
The cracks are generally at the restarts and are about 1" length just perpendicular.
- weldin mike 27
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Hard facing usually cracks, because it's has very little ductility.
noddybrian
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Not familiar with your rod so I don't know the hardness rating - there are many factors involved when hard facing according to the nature of the part - but as a general rule it's not good practice in the type of things I do to use 600 or over hardness without " buttering " the base metal with say 400 first - this is when cracking seems to be a problem - if your stuck " in the field " with only very hard rods use a higher than recommended current on the first pass & try to dilute the rod by melting the base metal rather than just concentrating on build up.
- Otto Nobedder
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"How Stellite Got Her Groove Back"...
In theaters now...
Sorry. A few beers and my mind does more than just wander...
Steve S
In theaters now...
Sorry. A few beers and my mind does more than just wander...
Steve S