[TheForge] Heat treating

[Paul N]

Good point. It's not the first time that I've had someone in the crowd 
like that. I often end up learning something as I later do research so I 
can add to my base of knowledge, and hence the question...

Like I said, I could have handled it a little better, but it's hard to 
be passive when someone simply states "No it doesn't, He's wrong." Then 
it was "shields up" and I got caught up in the debate, and _my_ wife 
wasn't there to remind me to behave :-)

**paul

On 12/6/11 8:20 AM, Bob Ehrenberger wrote:
> Paul,
>
> Most people tend to use the term "tempering" to represent the whole heat
> treating process, and don't understand that tempering is just one part of
> the process.
>
> I had someone try to tell me that if I used a spring to make tools that it
> would return to it's curved shape at a later time. I tried to tell him that
> when I heated it up, it reset it's shape never to return. In the end we had
> to agree to disagree. You have to decide what you want to fight about, once
> there is an impass figure out a way to change the subject. It doesn't do
> your demonstration any good to argue with the customers.
>
> Robert Ehrenberger
> Shelbyville, Mo.
> eforge at centurytel.net
>
> On Mon, Dec 5, 2011 at 9:59 PM, Paul Novorolsky<crosspein at sbcglobal.net>
> wrote:
>> During a public demonstration last weekend, I was explaining to someone
>> about hardening and tempering in pretty general terms. When I said that
>> tempering sacrifices some hardness for toughness, a spectator told me I
>> was wrong. He pretty much said "No it doesn't, tempering makes it harder".
>>
>> I disagreed assuming he had hardness and toughness confused, stating
>> that the heat treating charts for common steels show a reduction in
>> hardness at various tempering levels. He continued to tell me I was
>> wrong, because he had bought 100's of tons of "full hard stainless
>> steel" and asked how I explain that material. I told him I had no
>> knowledge of it, but tool steels will lose some hardness during
>> tempering. He repeated that I was wrong. At that point I was agitated,
>> and told him to do some research and he'll see that tempering does
>> result in loss of hardness, at which time his wife seemed annoyed with
>> him and dragged him out of our shop. (amusing in itself, as he was a big
>> man)
>
> ______________________________________________________________
> TheForge mailing list
> Home: http://mailman.qth.net/mailman/listinfo/theforge
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:TheForge at mailman.qth.net
>
> TheForge mail list group photo site is
> http://www.photoworks.com
> Login: blacksmithblacksmith at hotmail.com
> Password: anvil
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>