Selection criteria for projectile materials:
(1) Appropriate hardness (2) adequate density (3) appropriate metallographic structure
The conditions of the projectile material should be:
(1) Fast cleaning speed (2) stable quality (3) less consumption
The 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, in the spray throw in every corner can be fully cleaned, reduce the processing time.
(3) The internal defects of the projectile material, such as stomatal cracking, internal shrinkage holes, etc., can affect its life and increase consumption.
(4) When the density is greater than 7.4g/cc, the internal defects tend to be minimal.
How to judge the quality of steel shot
Summary of hardness of several common steel shot and steel grit
The formation process of steel shot
Steel shot centrifugal pill forming technology is the preferred choice for producing national standard steel shots
