[TheForge] Rust inhibitor

Sun Nov 28 19:05:07 EST 2004

Depends how big your quench tank is. An oil fire in a hot oil tank can be
more fun than you would care to have in any one day.
It's best to have a tight fitting lid to extinguish the flash flames.
because the reaction is exothermic and can get out of control rapidly.
Most commercial quenching oils are formulated for specific hardening rates,
and they aren't used at any where near their flash point. They would
deteriorate much too quickly.
Your old spring maker might have been talking about tempering springs rather
than quenching them.
It used to be common practice to dip the quenched spring in a heavy oil and
let the oil burn off several times to draw the spring temper. Now it is done
in tempering ovens.
Chuck
----- Original Message -----
From: "Peter Fels And Phoebe Palmer" <artgawk at thegrid.net>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Saturday, November 27, 2004 10:14 PM
Subject: Re: [TheForge] Rust inhibitor


> I once talked to an  old guy who'd worked in a spring fabricating  place
> . He said that  for tempering , they'd heat the spring till the quench
> oil flashed, several times.  The flash point of whatever oil they were
> using was close enough to be the temper temperature to call it
> right.....Pete F
>
> Chuck Robinson wrote:
>
> >The use of  those organic materials is because they are reduced to pure
> >carbon in an inert environment. The case hardening process took many
hours
> >to get a few thousandths penetration of the iron surface. Nothing that
you
> >would see at a lower temperature and certainly not with a quick pass of
the
> >horn in an oxidizing environment.
> >
> >Olive oil is used for quenching steel. It is a good quenching medium
because
> >the hot oil smells better than petroleum and other types of quenchants
and
> >the fumes are less harmful to breath.
> >I use it at about 180-200 F. It is heated to reduce the oil's viscosity
> >because it cools faster at that viscosity.
> >If you bring it to the boiling point you will probably reach the oil's to
> >its flash point when you stick in the hot billet.
> >Chuck
> >--- Original Message -----
> >From: "Michael H. Murphy" <blacksmith at comcast.net>
> >To: "'Sponsored by ABANA'" <theforge at mailman.qth.net>
> >Sent: Saturday, November 27, 2004 6:37 PM
> >Subject: RE: [TheForge] Rust inhibitor
> >
> >
> >I've run into that process in a number of historical texts.  Also other
> >types of horn, as well as leather, charcoal, and other organic materials.
> >Some were more successful than others.  I also heard something about
using
> >olive oil to draw the temper after quenching.  I'm not sure on this, but
I
> >think it had something to do with the boiling point of olive oil being a
> >good tempering temperature.
> >
> >Murf
> >
> >
> >
> >>-----Original Message-----
> >>From: theforge-bounces at mailman.qth.net [mailto:theforge-
> >>bounces at mailman.qth.net] On Behalf Of Dave Mudge
> >>Sent: Friday, November 26, 2004 5:20 PM
> >>To: 'Sponsored by ABANA'
> >>Subject: RE: [TheForge] Rust inhibitor
> >>
> >>In the book, "On Divers Arts" the 12 century author, scholar and all
> >>around
> >>Renaissance Man, Theophilus describes wrapping up pieces of iron along
> >>with
> >>shavings of cow horn or hooves and cooking it in a forge. I think that
> >>what
> >>happens is the carbon from the cow stuff gets migrated into the iron to
> >>form
> >>some crude steel or at least case hardened iron. I don't have time to
look
> >>it up now.
> >>
> >>Theophilus On Divers Arts
> >>translated from Latin by
> >>John Hawthorne & Cyril Stanley Smith
> >>a Dover Publication
> >>isbn # 0-486-23784-2
> >>
> >>dave mudge
> >>dave at magichammer.net
> >>http://www.magichammer.net
> >>http://www.metalsmithinghowto.com
> >>
> >>-----Original Message-----
> >>From: theforge-bounces at mailman.qth.net
> >>[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Kevin Donaho e
> >>Sent: Friday, November 26, 2004 7:36 AM
> >>To: Sponsored by ABANA
> >>Subject: RE: [TheForge] Rust inhibitor
> >>
> >>
> >>That could go a long way to explain development of cologne and perfume,
> >>BO
> >>is one thing, but smoldering cow horn, WHEW!
> >>
> >>Kevin (smells like money to me, but my wife doesn't appreciate it)
Donahoe
> >>
> >>    ------Original Message-----
> >>    -From: theforge-bounces at mailman.qth.net
> >>    -[mailto:theforge-bounces at mailman.qth.net]On Behalf Of Bill Alleman
> >>    -Sent: Thursday, November 25, 2004 10:42 PM
> >>    -To: TheForge
> >>    -Subject: [TheForge] Rust inhibitor
> >>    -
> >>    -
> >>    -So I'm watching a show on the Science Channel on recreating the oak
> >>    -cranes likely used to lift the stones for Gothic cathedrals, and a
> >>    -French blacksmith and medieval machinery expert claimed that
> >>    -he can seal
> >>    -his forgings from rust by rubbing them with a cow horn. He rubbed
> >>    -relatively lightly on the still-hot iron. The cow was not still
> >>    -attached. Has anybody tried this one?
> >>    ---
> >>    -
> >>    --= Ya can't blame me: I vote for liberty. =-
> >>    -       BikerBill=-                 ©¿©¬
> >>    -        allemanse.com=-
> >>    -         cafepress.com/freemarket
> >>    --= Proud Member - Reality-Based Community =-
> >>    -           FreeStateProject.org
> >>    -
> >>    -
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