see now that actually makes sense, especially if you're starting with a fairly cold anvil, or Small stuff (which I'm simply not talented enough to hammer weld small stuff lol)
No worries, one of the projects I've been meaning to get around too... is welding chainsaw chain into a billet, but somebody went and started a logging company while working full time as a machinist, so I haven't had a whole lot of time for playing in a couple few years... at one point I was part time blade smithing/armor making etc but knocking down trees paid better, so I've gone that direction, for now anyway.
as for location, as a rule I leave that out of forums, other then W Warshington/PNW where its getting harder to find good coal, and I might have to find a propane forge soon.
Another vid I recently watch spouted off the idear of "cleaning" the hammer between strikes, hence all the whacking of the poor anvil... it sounds all neato and makes a skookum show for the punters, but its simply wasted movement and hard on the anvil. But some grey beard extolled the importance of it... so now those that know better are going to spend a lifetime trying to correct the wrongs of a 5 min video... (fer the mods... Skookum= big, best, toughest, or rumors, news etc PNW Chinook Jargon)
Now if you tap the anvil to reseat ye ole whackin stick in yer lunch hooks to maybe switch from mashing the steel to say creating a taper, etc thats different.
Anyway, I get distracted (and i get hit in the head... like a lot...) as for forging drive chains, or roller chains, they are made up of 2 or more types of steel, the pins and rollers are generally high carbon, the side plate medium carbon, and some are sometimes chrome plated, getting and keeping the heat right for welding is I hear the hardest part. so a canister type weld might be a pretty good idear