Hardness & Particle size of the Steel shot which suitable for “Reinforced shot blasting machine”
“Reinforced shot blasting machine” is a kind of equipment used for metal surface treatment. By spraying steel shot on the surface of the workpiece at high speed, it removes impurities such as oxide skin and rust on the surface, and at the same time creates compressive stress on the surface, which improves the fatigue strength and wear resistance of the workpiece. When choosing the steel shot suitable for the “Reinforced shot blasting machine”, it is necessary to consider the “Hardness” and Particle size of the steel shot. The following are some common combinations:
• High hardness steel shot (HRC50-60) and medium particle size (0.8-1.2mm): This combination is suitable for the situations that require “Strong cleaning effect” and “Good surface roughness.” High-hardness steel shot can remove impurities and oxide skin on the surface more effectively, while medium-grained steel shots can reduce damage to the surface of the workpiece while ensuring the cleaning effect.
• Medium hardness steel shot (HRC40-50) and fine grain size (0.4-0.8mm): This combination is suitable for the situations where surface roughness is required. Medium hardness steel shot can remove surface impurities while reducing damage to the surface of the workpiece, while fine-grained steel shot can make the surface smoother.
• Low hardness steel balls (HRC30-40) and coarse granularity (1.2-1.6mm): This combination is suitable for the removal of thicker oxide skin and rust. Low-hardness steel shot can reduce damage to the surface of the workpiece, while coarse-grained steel balls can remove thicker oxide skins and rust more effectively.
It should be noted that the hardness and particle size of the steel shot are not the higher the better, but need to be comprehensively considered according to the specific workpiece material, shape, surface requirements and the model of the reinforced shot blasting machine. At the same time, when using a reinforced shot blasting machine, you also need to pay attention to controlling the injection speed, injection angle and injection time of the steel ball to ensure the best treatment effect.
Steven Wang
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Post time: Jun-17-2024