Surface Cleaning

The shot blasting equipment was initially applied in the foundry industry for the removal of sand adhering to and the oxidation scale from cast steel and cast iron products.

Almost all castings, such as gray castings, malleable iron castings, manganese steel castings, and nodular iron castings, undergo shot blasting. This process is not only essential for removing surface oxidation scales and adhered sand from the castings but also a crucial preparatory step before quality inspections. For instance, large gas turbine casings must undergo rigorous shot blasting before non-destructive testing to ensure the reliability of the inspection results. In general casting production, shot blasting is a vital technique for detecting surface defects like皮下气孔皮下气孔、slag holes, and issues like adhered sand, cold shuts, and scaling. For non-ferrous metal castings, such as aluminum alloys and copper alloys, surface cleaning, in addition to removing oxidation scales and detecting surface defects, primarily aims to clear burrs from die castings and achieve a decorative surface quality, delivering a comprehensive effect. In metallurgical steel production, shot blasting or acid pickling is a process method used to ensure high production rates in mass steel production by mechanically or chemically removing scale using a combination of mechanical and chemical methods. In the production of other alloy steel sheets and strips, such as silicon steel sheets and stainless steel thin plates, annealing must be carried out after cold rolling before shot blasting or acid pickling to ensure the surface roughness and thickness accuracy of the cold-rolled steel sheets.

Part strengthening

Based on modern metal strength theories, increasing the dislocation density within the metal is a key direction for enhancing metal strength. Practice has proven that shot peening is an effective process method for increasing the dislocation structure of metals. This holds significant importance for metals that cannot be further strengthened through phase transformation hardening (such as martensitic quenching, etc.) or on the basis of achieving phase transformation hardening. Industries like aviation, aerospace, automotive, and tractor parts require lightweight components but with increasingly high reliability demands. A crucial technological measure is to adopt the shot peening process to improve the strength and fatigue strength of the components.