Problem solved Ra After Blasting
08-21-2019, 10:55 AM,
#1
Ra After Blasting
Ra after blasting for HVOF coating

Hello everyone
Please Help me

I am inquiring everyone’s knowledge on the world of grit blasting , i want make test coupon for my customer , but my customer have spesifcatian that a surface roughness after blasting 51 - 127 microns, with grit 20-24 aluminum oxide, after I test it with 6 bar air and 6 inch stand af distance result Ra 5,3 - 6.9 microns , my question is, how do I get Ra 51 - 127 microns, while grit 20-24 results are 5.3 - 6.9 microns with the parameters I used earlier

Best Regards

gito
Reply
08-21-2019, 11:58 AM, (This post was last modified: 08-21-2019, 12:01 PM by qlethu.)
#2
RE: Ra After Blasting
(08-21-2019, 10:55 AM)gito Wrote: Ra after blasting for HVOF coating

Hello everyone
Please Help me

I am inquiring everyone’s knowledge on the world of grit blasting , i want make test coupon for my customer , but my customer have spesifcatian that a surface roughness after blasting 51 - 127 microns, with grit 20-24 aluminum oxide, after I test it with 6 bar air and 6 inch stand af distance result Ra 5,3 - 6.9 microns , my question is, how do I get Ra 51 - 127 microns, while grit 20-24 results are 5.3 - 6.9 microns with the parameters I used earlier

Best Regards

gito


51-127 micron of roughness is in Rz scale. It is different from Ra.
In my experience, it is not easy to attain Rz > 100 micron.



(08-21-2019, 11:58 AM)qlethu Wrote:
(08-21-2019, 10:55 AM)gito Wrote: Ra after blasting for HVOF coating

Hello everyone
Please Help me

I am inquiring everyone’s knowledge on the world of grit blasting , i want make test coupon for my customer , but my customer have spesifcatian that a surface roughness after blasting 51 - 127 microns, with grit 20-24 aluminum oxide, after I test it with 6 bar air and 6 inch stand af distance result Ra 5,3 - 6.9 microns , my question is, how do I get Ra 51 - 127 microns, while grit 20-24 results are 5.3 - 6.9 microns with the parameters I used earlier

Best Regards

gito

Reply




Users browsing this thread: 1 Guest(s)





Surface Engineering Forum Sponsor - Alphatek Hyperformance Coatings Ltd