[TheForge] Re: Powder Damascus

[Chuck Robinson]

Hey Andy,
Your absolutely right, it's really easy.
 I'll bet you could turn out a blade like steve's in a day or two.
http://www.steveschwarzer.com/damascus1.htm
The process your describing is closer to making CPM steel.
Chuck
----- Original Message -----
From: "Andrew Vida" <osan at netlabs.net>
To: <mspencer at tallships.ca>; "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Saturday, January 15, 2005 11:21 AM
Subject: Re: [TheForge] Re: Powder Damascus


>
>
> Mike Spencer wrote:
>
> > I dunno.  The sintered widgets I've seen appear to be to some degree
> > porous.  The sintered particles aren't totally fused, just, well,
> > stuck very firmly together.  In this powder Damascus technique, the
> > sintered billet gets rolled and forged to completely fuse the granular
> > sarting material.
>
> Nah... the gears in your car's differential are almost certainly
> sintered, and those don't look very porous, do they?  The main
> difference between commerical sintering and so-called "powder damascus"
> is order of operations.  In commercial sintering, super high pressures
> are applied to powdered metal in a mold.  The pressures are so high that
> the pressed forms can be finish-machined.  From there they go into the
> sintering furnace and presto!
>
> Powder damascus is sorta opposite... powder into a mold (retort),
> brought to heat, and then pressure is applied to stick the weld.
>
> As for porous, that is for bronze bearings and the sort.  I believe that
> that is controlled by the amount of pressure applied and the precise
> configuration of the metal particles used. Voila!  Oilite!
>
> -Andy
>
> PS: never ream the bore of an oilite bearing.  It closes the pores and
> the bearing loses all its attractive self lubricating properties.
> _______________________________________________
> 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
> ___________
>
>
>