Surface Wear Effects on Shot Peening
Surface Wear Effects on Shot Peening
(OP)
I have an application that has seen significant fatigue life improvement in a lab test by adding shot peening to the process. 30x to 50x life improvement. The problem is, the lab test does not simulate all of the service conditions. The part can undergo significant surface wear, beyond the max compressive layer. What can be done to reduce the wear without adversely affecting the fatigue life?





RE: Surface Wear Effects on Shot Peening
RE: Surface Wear Effects on Shot Peening
The wear occurs at contact from a loose joint (can't change this) and from abrasion along the surface of the part (can't change this either). Lubricant would work at the first wear area for a while, but it would not last long in the second area. It would have to be a permanent coating or surface treatment, low cost too. Sorry I have to be so vague. Any help?
RE: Surface Wear Effects on Shot Peening
RE: Surface Wear Effects on Shot Peening
Aaron Spearin, EIT
ChemE, M.E.
"The only constant in life is change." -Dan Andia; 1999, Chemical Engineering Progress
RE: Surface Wear Effects on Shot Peening
Now, to answer your question, after shot peening, a metalspray application of a wear resistant metal compatable with the base metal would give wear resistance, assuming the flame spraying did not heat the surface to a point that normalized the peening.
rmw
RE: Surface Wear Effects on Shot Peening
by shot peening? I know they are coating
many of our gear cutters and other tools
with some special coatings and have increases
the tool life by 300 percent. Shot peening
does help to improve the surface finish as
well as put compressive stresses into the
parts which improves or relieves tensile
stresses, so your are getting several
advantages by shot peening.
RE: Surface Wear Effects on Shot Peening
I am not familiar with the flame spray prcocess. Is this the same as flame hardening? Would nitriding be a better option? I want to avoid reheating the part if possible.
RE: Surface Wear Effects on Shot Peening
RE: Surface Wear Effects on Shot Peening
The flame is used to convey the metal coating, and does not heat the part appreciably.
rmw
RE: Surface Wear Effects on Shot Peening
How about industrial chrome plate?
RE: Surface Wear Effects on Shot Peening
What is the material and heat
treatment of your material that
you see such high improvement
in life by the shot peening.
Thanks for sharing this information.
You might want to submit an article
to several gear technology magazines
as this is very interesting.
I have read many gear articles on
shot peening and have never seen
such high results. Many manufacturers
would be interested in your results
as well as the designers of gears.
RE: Surface Wear Effects on Shot Peening
The material is AISI 5160, heat treated to 38 HRC.
RE: Surface Wear Effects on Shot Peening
Good Luck