Application range of shot blasting technology

Metal surface cleaning

Surface cleaning of various castings

Shot blasting equipment is first applied to the removal of sand and oxide scale on the surface of cast steel and iron castings in the foundry industry. Almost all steel castings, gray castings, malleable steel parts, ductile iron parts, etc. must be shot blasted. This is not only to remove the oxide scale and sticky sand on the surface of the casting, but also an indispensable preparation process before the quality inspection of the casting. For example, the casing of a large gas turbine must be subjected to strict shot blasting before the non-destructive inspection to ensure the inspection result. reliability. In the production of general castings, shot blasting is an indispensable process for discovering surface defects such as subcutaneous pores, slag holes, sanding, cold insulation, and peeling. The surface cleaning of non-ferrous metal castings, such as aluminum alloys, copper alloys, etc., in addition to removing oxide scales and discovering surface defects of castings, the main purpose is to remove burrs from die castings and obtain decorative surface quality. , To obtain a comprehensive effect.

Shot blasting of various forgings and heat-treated parts Most metal workpieces will have surface oxidation during forging heat treatment and heating. This layer of oxide scale has a serious destructive effect on the chemical coating of the parts and needs to be shot blasted. For parts that need to be cut, removing oxide scale is a necessary condition to reduce tool wear, increase cutting tool life, maintain machine tool accuracy, and control forging blank size to obtain the best cutting state. This is even more important for automatic processing machine tools. Shot blasting of the final heat-treated workpiece can obtain the comprehensive effect of removing oxide scale and strengthening the workpiece. Almost most of the gears of automobiles, tractors and other vehicles need to be shot blasted after heat treatment.

Metallurgical steel production process application

In the production of metallurgical iron and steel, shot blasting and pickling are a kind of mechanical-chemical combined removal of phosphorous skin process to ensure high productivity in mass production of steel. In the production of silicon steel sheets, stainless steel sheets and other alloy steel sheets and strips, annealing, shot blasting and pickling must be performed during the cold rolling process to ensure the surface roughness and thickness accuracy of the cold rolled steel sheets.