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Anonymous Poster

Cr2O3 Coating on a Thin Sleeve?

09/20/2007 3:02 AM

I don't know how to do that coating Cr2O3 on the sleeve. Because the sleeve is very thin it is easy to distorted after machinging. The sleeve ID.410mm,OD.430mm,and the material is SS316. Please help me. Many thanks!
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: how to coat on the thin sleeve?

09/20/2007 4:58 AM

Is there any way of doing it using the precipitation of particles using flame-spraying, in the same way as worn bearing journals can be built up?

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TVP45
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Join Date: Jul 2007
Posts: 4448
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#2
In reply to #1

Re: how to coat on the thin sleeve?

09/20/2007 11:50 AM

Ditto on the flamespraying. That's sort of a standard way, though I don't know about thermal stresses if the section is really thin. Be careful; Cr2O3 is nasty stuff.

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BillM
Active Contributor

Join Date: Apr 2007
Posts: 14
#3

Re: Cr2O3 Coating on a Thin Sleeve?

09/21/2007 8:02 AM

If the material is 316 you may want to try Kolsterising www.kolsterising.info

Surface hardness of 68-70 HRc at depths of 20-50 microns without loss of corroison resistance and without dimensional change.
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Anonymous Poster
#4

Re: Cr2O3 Coating on a Thin Sleeve?

11/10/2007 3:32 AM

I'think do the coatiing it's no problem by Plasma spraying.

you do the base material ID is much to spraying. But you must do the coating

with the air cooling. That's good maybe.
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