Selection criteria for projectile materials:
(1) Appropriate hardness (2) adequate density (3) appropriate metallographic structure
The projectile material shall have the following conditions:
(1) fast cleaning speed (2) stable quality (3) less consumption
Relationship between density and life:
(1) The hardness is proportional to the cleaning speed, but inversely proportional to the life. Therefore, the hardness is high, the cleaning speed is fast, but the life is short and the consumption is large, so the hardness should be moderate (about HRC40-50 is appropriate) to produce the most economic effect.
(2) Moderate hardness, with excellent resilience, can be fully cleaned in every corner of the spray, reduce the processing time.
(3) The internal defects such as pore cracking and internal shrinkage can affect the life of the ejection material and increase the consumption.
(4) When the density is greater than 7.4g/cc, the internal defect tends to be the smallest.
Steel shot is widely used for descaling and rust removal treatment
How are steel shot and grit used to treat steel surfaces?
Steel shot is widely used for descaling and rust removal treatment
What are the unique characteristics of steel shot?
