Blasting Knowledge

Choosing the appropriate steel shot is crucial for the performance of the shot blasting machine and the treatment effect of the metal surface.The following key factors should be considered when choosing steel shot:

Material selection: The material of the steel shot has a significant impact on its hardness and wear resistance. Steel shot or grit made of high carbon steel or alloy steel has high hardness and wear resistance, and is suitable for processing high-strength alloy steel and stainless steel materials. Steel balls or steel grit made of low-carbon steel or ordinary cast iron have lower hardness and poorer wear resistance. Carbonized and quenched steel balls or steel grit can improve their hardness and wear resistance, making them suitable for processing materials with higher hardness or wear resistance requirements.

Size of steel shot: The particle size of steel shot or steel sand directly affects its impact force and cutting ability. Smaller particle size can increase the impact force and cutting ability per unit area, forming a deeper hardening layer on the metal surface, but it also increases production costs. Therefore, the selection of granularity should be comprehensively considered based on the processing effect and production cost. For softer materials, larger grain sizes of steel shot or steel sand can be chosen; For materials with higher hardness or wear resistance requirements, smaller particle sizes of steel shot or grit should be selected.

Hardness: The hardness of steel shot or grit has a significant impact on its impact force and cutting ability. Steel shot or grit with higher hardness can provide greater impact force and cutting ability, but at the same time, they are more prone to fragmentation or wear, thereby shortening their service life. Therefore, when choosing hardness, factors such as treatment effect and service life should be comprehensively considered

Surface treatment effect and usage conditions: When selecting steel shot, factors such as the model, power, and usage conditions of the shot blasting machine should also be considered. Different models of shot blasting machines have different impeller speeds and processing capabilities, so suitable steel shot should be selected to meet their processing requirements. At the same time, steel balls should be regularly inspected and replaced during the production process to ensure that their hardness and wear resistance meet the requirements.

In summary, selecting the appropriate steel shot is one of the key factors in improving the surface hardness and wear resistance of metals. It is necessary to comprehensively consider factors such as material, particle size, hardness, and the specific operating conditions of the shot blasting machine.