[TheForge] Hardy questions

[Jerry Frost]

Chris:

The line marks the depth of the induction hardening done in manufacture.

Sometimes you can see patterns in the web when saw cutting. I believe these
to be artefacts of minor variations in hardness or grain structure imparted
at the mill.

A tip for better blade life when cutting rail: Turn the rail flange side up
and tip it slightly in the direction of the teeth, this may need a little
shimming. Cutting from the bottom lets the teeth attack the hardened part of
the rail from the soft side. The teeth will last several times as long.

Frosty
------------------------
If it ain't forged
it ain't real.
Wrought iron is.
The FrostWorks

Meadow Lakes, AK.


----- Original Message -----
From: "Chris Kilpatrick" <crimsonkil at lycos.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Wednesday, November 24, 2004 8:36 AM
Subject: Re: [TheForge] Hardy questions


    This rail never saw service, it still has the finishing grinding marks
on the rail top.  When I sliced it through, I could see a line about 5/16
below the surface, that went across the face of the of my cut.  It could
just be an illusion of the saw;  I have symetrical undulations across the
web of this same rail from my saw, so that is a possibility, but the rail
head piece is more abrupt; there is an actual line I can see.  Work
hardening as I understand it is like heat treating in that it decreases over
depth as opposed to a visible, precise, razor fine line.

-Chris K.