[TheForge] going for gas

Sun Feb 9 21:24:02 2003

        Chuck,  I didn't want blowers on my forges as folks were going to
use them to teach and wanted them rather quiet.  I'm happy with what I have
now, but thanks for the idea to eliminate excess scale even further.

Ralph


----- Original Message -----
From: "Chuck Robinson" <[email protected]>
To: <[email protected]>
Sent: Sunday, February 09, 2003 7:56 PM
Subject: Re: [TheForge] going for gas


> Hey Ralph,
> I make and use blown gas forges for most of my work. The difference in
heat
> out put for a blown forge with a good high pressure fan over atmospheric
> burner forges is quite significant.
> The only downside is increased scale formation at max heat output.
> When I'm heat treating my bladesmithing anvils, the faster that the anvil
> head can be brought above critical temperature the better, in order to
> confine the heat to the top 5 inches of the billet's surface.
> My heat treating furnace does this in 15 minutes from a cold start.
> To minimize the scale formation, it helps a lot to toss a few fist sized
> chunks of metrological grade coke into the forge.
> The coke scavenges up any excess oxygen, produces extra heat and leaves
> almost no residue behind.
> Chuck
>
>
> ----- Original Message -----
> From: "Ralph Sproul" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, February 09, 2003 7:19 AM
> Subject: Re: [TheForge] going for gas
>
>
> >         Andy,  No, I don't get much more scale with gas than
> coal.......when
> > I had that problem, I redrilled the gas jet to elliminate the problem.
A
> > slightly carberizing flame will yield less scale.......as in a coal
fire.
> > To much air is what yields scale.
> >
> > Ralph
> >
> >
> > ----- Original Message -----
> > From: "Gladish Family" <[email protected]>
> > To: <[email protected]>
> > Sent: Saturday, February 08, 2003 11:58 PM
> > Subject: RE: [TheForge] going for gas
> >
> >
> > > >         The only time I light my coal forge is when I have some
forge
> > > > welding that needs done.  Other than that - I use propane all the
> > > > time.   I
> > > > love the ability to work 6-8 pieces at the same time.  Never
> > > > could get away
> > > > with that in a coal fire........or at least I couldn't.
> > > >
> > >
> > > Don't you get a lot more scale than you would with coal?
> > > When you use coal it's sometimes a choice between burning your other
> > pieces
> > > or going slow- but I really like the surface that I get with coal. For
a
> > > piece that I want to be really nice, or if it's practical to heat
> shorter
> > > areas, there's very little cleanup when the forging's done if I pay
> > > attention and finish hammer down into black heat.
> > > I only seem to use gas when I need a long heat.
> > > Andy G.
> > >
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