Shot Blasting - Blackish SUrface finish
Shot Blasting - Blackish SUrface finish
(OP)
Guys,
Anyone face this issue before? the parts do tend to be on the blackish side after shot blasting - shots used s110, material shot blasted = hot rolled/ cold rolled steel cages....this especially is an issue when new shots are added...
need to run "dummy lots" with scrap parts to lighten the shade...after a couple of hrs run the shots do indeed give lighter shade shot blasted parts...
very weird? anyone think media work-balance issue? anyway to resolve this...we do regular sieve analysis and they do pass...
any help appreciated
Anyone face this issue before? the parts do tend to be on the blackish side after shot blasting - shots used s110, material shot blasted = hot rolled/ cold rolled steel cages....this especially is an issue when new shots are added...
need to run "dummy lots" with scrap parts to lighten the shade...after a couple of hrs run the shots do indeed give lighter shade shot blasted parts...
very weird? anyone think media work-balance issue? anyway to resolve this...we do regular sieve analysis and they do pass...
any help appreciated





RE: Shot Blasting - Blackish SUrface finish
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"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: Shot Blasting - Blackish SUrface finish
RE: Shot Blasting - Blackish SUrface finish
RE: Shot Blasting - Blackish SUrface finish
We proved similar pb with SS.
The root cause was the oxide layer left after Heat treatment.
Solution was:
1-Perform heat treat under vacuu, to avoid decraburization.
2-Descale parts after heat treat and before blasting.
for our grade we found the supllier suggestion
to descale the material after Heat treat.
It looks complicated as treatment but most of surface treatment shops are very familiar with.
Regards,
Zinov
RE: Shot Blasting - Blackish SUrface finish
U mean descale my parts? i would have to go all the way to my material supplier to get it done isnt it? we get material in the form of hot rolled and cold rolled steels...arggg..guess would have to look into that option
RE: Shot Blasting - Blackish SUrface finish
RE: Shot Blasting - Blackish SUrface finish
RE: Shot Blasting - Blackish SUrface finish
RE: Shot Blasting - Blackish SUrface finish
_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year