Shot blasting, and shot peening, are different processes.
Shot peening is scientific, expensive, and no-one anywhere near me provides that service. It's an aerospace-level process. Tightly controlled.
Shot blasting on the other hand, is done by pretty-much every automotive machine shop in America. It's a cheap and "environmentally-friendly" way to clean parts. There's little science, and virtually no "control". A big motorized wheel scoops up a bazillion little iron/steel balls and flings them semi-randomly at parts loaded into the machine. If there's any [structural] benefit aside from removal of rust/carbon/varnish, it's purely by accident.
|