Re: [ihc] Front Spindles Heat treated?

["Ryan Moore" <baradium@xxxxxxxxxxx>]

----- Original Message ----- 
From: "Jim or Ginger Aos" <jaos@domain.elided>
To: <ihc@domain.elided>
Sent: Sunday, March 14, 2004 20:08
Subject: Re: [ihc] Front Spindles Heat treated?


> ----- Original Message ----- 
> From: "John Hofstetter" <hofs@domain.elided>
> To: "Jim or Ginger Aos" <jaos@domain.elided>; "James Lidberg"
> <jameslidberg@domain.elided>; <ihc@domain.elided>
> Sent: Sunday, March 14, 2004 1:10 PM
> Subject: Re: [ihc] Front Spindles Heat treated?
>
>
> > on 3/13/04 3:34 PM, Jim or Ginger Aos at jaos@domain.elided wrote:
> >
> > > The difference is in the heat treating
> > >
> > > Lt. straw             400 degrees F
> > > Dr.    straw         450 degrees F
> > > Lavendar            500 degrees F
> > > Dr. blue              600 degrees F
> > > Lt. blue               650 degrees F
> > > Dull red on a dark day 1,000 degrees F
> > >
> > > These are approximate and are dependant on a failing memory, and this
is
> > > more than you asked for Jim A.
> >
> > So, Jim, these are the temps for annealing steal.
> Not really;  True annealing is done by heating to the austenitic
condition,
> 1350 F to 1700 F, at that temp. the carbon goes into solution with the
iron
> and the steel is unaffected by a magnet.  Then you slow cool it to about
200
> degrees F taking about 1 to 6 hours depending on the alloy content.  The
> higher the carbon equivalency the longer it takes.  Cooling to quickly is
> quenching which causes brittlness or what is called, "file hard" or ,"dead
> hard".  Normalizing heating to the same austenitic temp, but letting it
cool
> natural.
>

IIRC from my materials classes, there are more processes too, one of which
is to actually slow the cooling process down... then there's forging vs
casting and all that great stuff.

-Ryan


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