S-phase nitride coating on steel(S-143)
S-phase nitride coating on steel(S-143)
(OP)
Hi All,
I had recently performed S-phase nitride coating on S-143 precipation hardened steel to improve cavitation erosion properties of the material. however the the cavitation erosion property worsened after the s-phase nitride coating was performed, instead of improving it.
I am confused as to why this has taken place since, S-phase nitriding should provide more strength to the surface rather than ordinary S-143 ppt hardened steel. does cavitation erosion has to do with anything with surface finish and not the strength etc.
Can sombody give a an explanation on what could have possibly gone wrong.
is polyurethane coating a good way to prevent cavitation erosion.
I had recently performed S-phase nitride coating on S-143 precipation hardened steel to improve cavitation erosion properties of the material. however the the cavitation erosion property worsened after the s-phase nitride coating was performed, instead of improving it.
I am confused as to why this has taken place since, S-phase nitriding should provide more strength to the surface rather than ordinary S-143 ppt hardened steel. does cavitation erosion has to do with anything with surface finish and not the strength etc.
Can sombody give a an explanation on what could have possibly gone wrong.
is polyurethane coating a good way to prevent cavitation erosion.





RE: S-phase nitride coating on steel(S-143)
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RE: S-phase nitride coating on steel(S-143)
I will have to get back to the nitriding people to understand the extact treatment conditions etc, since the S-phase nitriding was performed by a third party.
however we were promised a hardness 3 times that of ordinary S-143 coupon. Which didnot happen at all.