Just so there's no questions, I dug this out of a catalog I use at
work(Hydro Honing Laboratories) , I think it pretty much sums up the Shot
Peening Process.
What is Shot Peening ?
Shot peening is a cold working process used to increase the fatigue life of
metal parts. Parts are bombarded with round steel, glass, or ceramic shot
under controlled conditions to induce a stressed surface layer in
compression. This surface layer inhibits the formation of tiny surface
cracks which give way to fatigue failure.
N.A. Campiglia III
'67 Spitfire MKIII
'74 Spitfire 1500
http://camalott.com/~spitdrvr
----- Original Message -----
From: Ryan Smith <shmitty99@hotmail.com>
To: <spitdrvr@camalott.com>
Cc: <spitfires@autox.team.net>
Sent: Monday, July 19, 1999 2:25 PM
Subject: Re: rebuilding the engine, with more than one question
> Actually shot peening and case hardening have very little in common. Shot
> peening is just a means of removing surface defects from the material. It
> does not make it harder in any way like heat treating or case hardening
> does. The purpose of shot peening is to remove the potential starting
place
> for a fracture. Fractures propigate from the weakest place in the surface
> so if the surface is made uniform the chance of a fatigue fracture is
> lessened.
>
> Ryan Smith
> 72 Emerald Green Spitfire
>
>
> >From: "N.A. Campiglia III" <spitdrvr@camalott.com>
> >Patrick,
> > > 1) what is shot peening?
> >This is a process of relieving stress in metal structures. A regular
> ...cut...
> Think of it this way, shot pening forms a kind of
> >toughened skin on the outside of the part sorta like case hardening...
>
>
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