[TheForge] Fw: -Hay rake tines

[Paul N]

Thanks for the followup.
I just posted that because I'm constantly on the lookout for concise 
charts, etc like that to keep in the shop.

I have very limited experience with hardening/tempering, and I've been 
reading tons of stuff, including the phase diagrams, CCT/TTT diagrams 
etc. Makes it worse as I rarely know precisely what kind of steel I'm 
working with.

While I don't have any hardness/stress-strain testers, or a microscope 
to examine grain sizes, I am starting to experiment a little. In my 
recent research, I found the "knee" in the TTT and CCT diagrams very 
interesting. Particularly how you end up with different microstructures 
if it takes you 2 seconds to go from critical temp to quench versus 
taking 10 seconds to make that trip (for things like 1095 anyway)

You (Dave) seem to have some real experience with this stuff.

**pn

David E. Smucker wrote:
> Paul,  These are a good set of charts on various steels.
> 
> For what it is worth, I always treat 1095 and W 1, as the same steel. 
> Mostly we see W 1 in the form of drill rod.  1095 really is very similar, if 
> not the same steel and they heat treat the same for all practical purposes. 
> Remember that our heat treat process is "crude" but still results in very 
> useful tools.
> 
> Dave
> 
> --------------------------------------------------
> From: "Paul N" <crosspein at sbcglobal.net>
> Sent: Thursday, March 26, 2009 9:16 AM
> To: <munlaw2 at hcsmail.com>; "Blacksmithing List Sponsored by ABANA" 
> <theforge at mailman.qth.net>
> Subject: Re: [TheForge] -Hay rake tines
> 
>> I'll tell you stuff on this list gets me thinkin' and looking up stuff
>> which is really broadening both my knowledge.
>>
>> Found this while looking for a comparison of 1095 and W1: (sorry bout
>> the long URL) It's a PDF chart of composition of common steels with some
>>  hardening and tempering temps and corresponding hardness results....
>> I'll be putting a copy in the shop today)
>> http://www.google.com/url?sa=U&start=7&q=http://bdml.stanford.edu/twiki/pub/Main/SteelSelectionandTreatment/McMasterHeatTreat.pdf&ei=dn3LSa-mENfqnQer5aHYCQ&usg=AFQjCNGd8EkrgP8E1baye8qd2hfvz_1y_A
>>
>> **pn
>>
>> Ron Childers wrote:
>>> Dave, I think the old round tines on the horse drawn hay rakes are 1095 
>>> and
>>> the newer flat ones as used on a 3 point hitch are w1. You are correct 
>>> about
>>> not over heating 1095. I have good results using oil as a quench.... Ron 
>>> C
>>>
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