still has the sharp corners from the cutting operation. As-cut wire shot is an effective cleaning abrasive but it isn't suitable for shot peening applications since the sharp edges are potentially damaging to fatigue life.
has had its sharp edges removed in a process called “conditioning." Conditioned cut wire shot is used in shot blasting and many automotive and military shot peening applications.
has been double conditioned in order to achieve shot that is more spherical in shape.
has been cut and conditioned to produce an exceptionally smooth and round media. This media is used in the most demanding blast cleaning and shot peening processes.
Cut Wire Shot does not have an Iron Oxide coating or leave Iron Oxide residue—parts are cleaner and brighter. All media leave a residue on the surface of the part being blasted or shot peened. Those media that fracture rapidly can leave tiny broken particles imbedded in the part surface. Other media leave a very thin smear on the part surface. Cut Wire Shot media does not breakdown as quickly as other media and does not tend to fracture into the tiny particles that may imbed themselves into the part surface. Therefore Cut Wire Shot media leaves much less (as much as 10 to 20 times less) residue on the part surface.
Due to its wrought internal structure with no internal defects (cracks, porosity and shrinkage), the durability of Cut Wire Shot is much greater than Cast Steel Shot. Microstructure of Cut Wire Shot is pearlite which is best combination of hardness and durability. Microstructure of Cast Wire Shot is bainite (which deforms quickly) or martensite (which led to fracturing of shots). Minimum service life (durability) of Spajic Cut Wire Shots is 4200 cycles, regardless particle size and hardness. In addition to the Durability of media, the mode of breakdown is very important, especially in shot peening applications. Cast Steel shot deteriorates by forming broken (fractured) particles. Cut Wire Shot media's mode of deterioration is wear. Cut Wire Shot particles tend to wear down into smaller diameter pieces rather than fracture into sharp edge broken particles.
Cut Wire Shot media has the highest consistency from particle to particle in size, shape, hardness and density. Cast wire shot does not have Consistent Performance due to fast size deterioration.
Cut wire shot provide reduced time for Shot Blasting/Peening. Cast Steel Shot higher consumption in Shot Blasting/Peening increases Working Cycle time. Consumption of Cut Wire Shot decreases i.e. 33% to 67% less to Cast Shot (case to case basis). Lower Process Time and Media Consumption reduce Operation and Inventory Costs for the same job
Microstructure of Cut Wire Shot is pearlite which is best combination of hardness and durability. Microstructure of Cast Wire Shot is bainite (which deforms quickly) or martensite (which led to fracturing of shots). Cut wire shots have stabilized grain size due to drawing passes. Grain size of Cast Shot is unstabilized.
Cut Wire Shots are being made out of same wire and they are identical, no variation of size anywhere. Cast Steel Shots are being produced of mixed size hence product is a mix of various sizes.
Cut Wire Shot media tends to wear down and become smaller in size rather than fracturing into sharp-edged broken particles, which may cause surface damage to the part.
Cut Wire Shot is more durable and resistant to fracture, resulting in a lower (almost none) dust generation rate. Cast steel shots have high dust generation rate.
Parts exhibit higher and more consistent life than those peened with equivalent size and hardness cast steel shot. Fatigue tests have been performed on actual parts as well as laboratory specimens to determine if one steel media is equal to, or better than, another in terms of part life. Parts and specimens shot peened. With Cut Wire Shot exhibit higher average life and more consistent life than those peened with equivalent Cast Steel Shot.
The longer useful life of SPAJIC Cut Wire Shot results in savings of media consumption, dust removal and equipment maintenance. Rounded edges cause less damage to all impacted areas of the blast machine.