[modeleng] Re: Fool question
- From: "Dave Beaman" <davebeaman@xxxxxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Tue, 9 Oct 2007 20:42:09 +0100
And cowboys like me keep hammerin to any metal..... One of these days I will
learn, until then, 'll keep on butchering, stil get the results!!
Dave.
----- Original Message -----
From: "Patrick Coppens-Marian Lynch" <develop@xxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Tuesday, October 09, 2007 5:45 PM
Subject: [modeleng] Re: Fool question
"*that lead to this? Ductility*?"
This is one of the consequences of the arrangement of the metal atoms.
The cohesion between the molecules being another. Brass being an alloy, and
still having it constituents intact (ie not forming new different
molecules)only makes matters more complicated.
A cutting action, serves to sever the layers of material. Different stuff,
different knives.
You could cut a hamburger with a blunt knife, but you couldn't cut a piece
of raw ham with the same knife.
The same is true for metals, if you use the wrong 'knife' you just push the
molecules aside, instead of severing them from their next door neighbor
The "digging in" just shows, that the cohesion between the parts is too
big,and they stretch,instead of being severed.
In using a different cutting edge, you prevent that from happening
Patrick
peter.chadwick@xxxxxxxxxxx wrote:
> Jesse,
>
>
>> Positive rake on tools used with brass will cause the tools to "dig or
>>
> hog
> in" and damage the work.<
>
> Yes, but the real question is why? What are the physical properties of
> brass that lead to this? Ductility?
>
> Peter Chadwick
> Swindon
>
>
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