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How much thickness does shot blasting remove?



(-----) February 6, 2008

Dear Friends,
Can you please throw some idea about the thickness reduction after shot blasting process? Is there any IS / International standards to refer?

Raja Anantharengan
Quality Assurance Executive - Hosur, India
^


February 9, 2008

Material removal is the right term. It depends on amount of energy transferred, which in turn depends on particle type and speed, and substrate. Softer media (natural organic powders, plastic or dry ice) remove only loose oxides, paint, dirt, etc. These particles are relatively soft and their density very low, so the energy accumulated for impact and transferred to the substrate is low. Glass beads are very hard and more dense but the energy is spread upon impact due to their round shape. Angular, hard and dense particles (SiC, AlO2 or steel shot) remove the most. Among substrates, hard and brittle materials are more affected, whereas, tough ones like soft nickel, SS, copper or aluminum resist more. Resilient materials like rubber are the least affected.
G. Marrufo-Mexico

Guillermo Marrufo
Monterrey, NL, Mexico
^

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