STEEL ABRASIVES ( Steel Grit or Steel Shot )
Steel Abrasives are mainly used for two applications. 1. Surface Preparation industry and 2. Stone cutting industry.
Steel shots are spherically shaped product made of carbon steel and manufactured by melting of scrap in induction furnace. To obtain the SAE standards the molten metal is analyzed for chemical composition and strictly controlled by spectrometer. It is then atomized and transformed to round shaped and subsequently quenched and tempered by heat treatment process to provide uniform microstructure, density and required hardness coupled with good toughness for durability. And it is then screened to SAE standard specification.
Steel shot is widely used on wheel blasting equipment. It can also be used in open blasting for descaling of steel component prior to coating, shot peening, deburring etc. Another industry application for steel shot is in foundry to remove sand from castings and clean after the removal of moulds.
If used in proper equipment, steel shot will turn to be the ultimate economical abrasive blasting media for surface preparation due to its durability as it can be recycled number of times. The consumption rate of abrasive for blasting using steel shot will very less comparing any other blasting media. Rate of breakdown is very low and hence the dust generation while blasting will be also significantly less.
Steel Grit is manufactured from high carbon steel shot which are crused to angular shape by special roll mill and subsequently tempered to different hardness grades (GH, GL & GP) for different blasting applications. Finally, each hardness grades are screened to different abrasive mixes.