[TheForge] quench questions

[Dan Tull]

I don't think I would try either of those w/ super quench.
dan tull
georgia
abba, afc, S.C. psba, obg,sofa
----- Original Message ----- 
From: "gblacksmith" <gblacksmith at alamedanet.net>
To: <artgawk at thegrid.net>; "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Tuesday, December 28, 2004 9:12 PM
Subject: Re: [TheForge] quench questions


>I think the hammer dies would harden fully if made from a deep-hardening 
>alloy; ie, those with chromium added.  The 10 series would not be as deep 
>hardening as the 4140 or 5160 previously mentioned.  The plain-carbon 
>steels have a tough time hardening sections thicker than one inch, in my 
>experience, regardless of quenchant used.  Grant
> ----- Original Message ----- 
> From: "Peter Fels And Phoebe Palmer" <artgawk at thegrid.net>
> To: "Sponsored by ABANA" <theforge at mailman.qth.net>
> Sent: Tuesday, December 28, 2004 5:58 PM
> Subject: Re: [TheForge] quench questions
>
>
>> My fuzzy memory is that Rob G said he had used it for  A36 hammer dies 
>> and it yielded " Enormous toughness".......PF
>>
>> Andrew Vida wrote:
>>
>>>
>>>
>>> David E. Smucker wrote:
>>>
>>>> It is always a good discussion on "super" quench, (I wish it was called 
>>>> "rapid" quench, keeping in mind that there is no magic at work here.) 
>>>> Best data I have seen to date is that with small section (1/2 x 1/2 
>>>> square A36) you can get to a Rc of 50 or so.  An that is without any 
>>>> drawing or tempering.
>>>
>>>
>>>     That would seem about right.  I've made quite a few tools from 
>>> A36... punches and chisels... and for the most part they have worked 
>>> well. Most I made as throw away tools, only to find that they were too 
>>> good to toss adter use, so they went into the handy bits bucket.  For 
>>> quick and dirty tooling, I don't think you can beat it.
>>>
>>>>
>>>> In large sections such as a hammer die or even a hammer die insert 
>>>> would someone please explain the physics on how you will quench this 
>>>> rapidly enough to get a hard surface let alone any depth of hardness.
>>>
>>>
>>>     You may not be able to.  dies for a typical 25# hammer may work out 
>>> OK, but I'm not at all sure that anything bigger would.  The only thing 
>>> I can think of is if you had perhaps a couple hundred gallons of the 
>>> stuff, had an enclosed area with hose and pump, donned a space suit and 
>>> exposed the work to a violent jet of the medium, which I would expect 
>>> would harden to a case at best... maybe 1/2 to 3/4 of an inch? But that 
>>> might be just good enough. That's just a guess based on what I know 
>>> about the materials.  For all I know, it might fail completely... or 
>>> maybe do even better, though I doubt it.
>>>
>>> I agree with you that just using a good plain tool steel is probably a 
>>> much better bet.  4140 isn't that expensive, comparatively speaking, and 
>>> the headaches saved, I think, are well worth the few extra dollars. Some 
>>> things just are not worth rigging if you don't have to.
>>>
>>> _______________________________________________
>>> Manage membership or unsubscribe at:
>>> http://mailman.qth.net/mailman/listinfo/theforge
>>> theforge mail list group photo site is
>>> http://www.photoaccess.com
>>> Login:  blacksmithblacksmith at hotmail.com
>>> password:  anvil
>>> ___________
>>>
>>>
>>>
>>
>>
>> _______________________________________________
>> Manage membership or unsubscribe at:
>> http://mailman.qth.net/mailman/listinfo/theforge
>> theforge mail list group photo site is
>> http://www.photoaccess.com
>> Login:  blacksmithblacksmith at hotmail.com
>> password:  anvil
>> ___________
>>
>>
>>
>
>
> _______________________________________________
> Manage membership or unsubscribe at:
> http://mailman.qth.net/mailman/listinfo/theforge
> theforge mail list group photo site is
> http://www.photoaccess.com
> Login:  blacksmithblacksmith at hotmail.com
> password:  anvil
> ___________
>
>
>