Roger B
Lawn Addict
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- Oct 19, 2016
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Re: Anvil
Replies follow Bert's comments after three of these - - -
Roger
Replies follow Bert's comments after three of these - - -
Drop tests are not really good. - - - But they do indicate a degree of hardness, or even more importantly, a lack thereof!
Two distinct types of anvils.
Blacksmiths Anvils - - - This was a blacksmith's anvil
Tool makers Anvils
A smiths anvil does not need to be particularly hard as you work red hot metal on it and any hardness or tempering gets locally destroyed.
What is important is it is the same hardness from one end to the other and flat.
Smiths anvils are generally wide and very heavy.
Typically they are made from malleable iron ( SG iron to some ) - - - Agreed, for the most part. Although I'm not sure that beating red hot metal on the face of an anvil would have much effect on it's 'temper' or hardness. Maybe over a long period of time.
If it had been outside in a forest fire it may just have gotten hot enough to change the microstructure but you need a lot of heat to get it up to 900 C then hold it there for long enough for the heat to soak through .
Remember it was in a barn where animals piss & poo and pissing on an iron or steel item will cause rust to accelerate. - - - The smithing shop was usually a separate part of the barn if not a separate building, for safety if nothing else. The barns I'm talking about were very large and constructed of huge timbers and when one burns, and the floor collapses into the cellar the resulting coals will burn for days if not completely extinguished. It would definitely create enough heat, long enough to change the micro structure of the iron.
If you want hard face, take it to a welding shop and get some hardfacing laid on the top then get it ground flat. - - - I have seen anvils with a hard face welded to the top, I'm not sure how that welding is accomplished without effecting the hardness of the applied piece, but I have seen it done. I would need to have the existing face milled flat first.
When finished, dip it in a tub of molassas for a week to passivate the surface - - - I have never heard of that process before! As usual I always learn something when you post something. I will research that.
Get a grade 5 bolt and flatten the head..If it leaves an impression then the face is too soft.. If you just ruined the bolt the face is quit hard enough. - - - Makes sense
Remember the anvil needs to be softer than the hammers you use on it but harder than what is between them. - - - Makes even more sense
Roger