[TheForge] Heat Treating 5160 was Welding 5160

Wed Aug 27 00:34:00 2003

Using a magnet to indicate critical temp   things just don't harden for me,
I always have to go a scunch past non magnetic.  After reading all these
posts I'm thinking it might be extra time not extra temp that 's making the
difference.
I'm talking about all small stuff, punches, chisles, etc.
Randy Mundt
----- Original Message -----
From: "Dave Brown" <[email protected]>
To: <[email protected]>
Sent: Tuesday, August 26, 2003 3:48 PM
Subject: Re: [TheForge] Heat Treating 5160 was Welding 5160


> At 00:28 08/26/03 -0700, you wrote:
> >Interested parties:  Transformation time from pearlite and ferrite to
> >austenite is a function of the mass of the piece, rather than its
alloying,
> >assuming critical temp is reached.   <snip>
> >I have not been able to get even very thin w-1 knife blades to fully
harden
> >in five minutes at critical, as measured by pyrometer, using oil quench.
>
> Just out of curiosity ... Why would you quench W-1, a steel designed for
> water hardening, in oil?  I would think that would contribute
significantly
> to your not reaching full hardness when you quench it.  Why not just
quench
> in water?
>
> <snipped a ton of other stuff not needed for this question>
>
> Dave Brown
>
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