Introduction to the application range of the sheet pre-treatment line
Surface cleaning
Shot blasting equipment is first used in the foundry industry cast steel, cast iron parts of the surface sand and oxide skin removal.
Almost all cast steel parts, gray castings, malleable steel parts, ductile iron parts, etc. are subjected to shot blasting treatment. This is not only to remove the casting surface oxidation and sticky sand, but also casting quality inspection before the indispensable preparation process, such as large gas turbine casing in the non-destructive testing must be carried out before the strict shot blasting cleaning to ensure the reliability of the flaw detection results. In the production of general castings, shot blasting cleaning is an essential process means to detect surface defects in castings such as subcutaneous porosity, slag holes and sticky sand, cold compartment, skin, etc.. Non-ferrous metal castings, such as aluminum alloys, copper alloys and other surface cleaning, in addition to the removal of oxide, the discovery of surface defects in the casting, the main purpose is to blast shot blasting to remove the burr of die castings and obtain the surface quality with decorative significance, to obtain a comprehensive effect. Metallurgical steel production, shot blasting or pickling is a process method to ensure that the steel mass production to obtain high productivity and the use of mechanical or chemical joint removal of phosphorus skin. Silicon steel sheet, stainless steel sheet and other alloy steel plate, strip production, in the process of cold rolling process must be annealed and then shot blasting or pickling treatment to ensure the surface roughness and thickness accuracy of cold rolled steel sheet.
Workpiece strengthening
According to modern metal strength theory, increasing the dislocation density inside the metal is the main direction to improve the metal strength. Practice has proven that shot blasting is a proven process method to increase the dislocation structure of metals. This is of great importance for some metals that cannot be hardened by phase transformation (such as martensite quenching, etc.) or on the basis of phase transformation hardening and require further strengthening of the workpiece. Aviation, aerospace industry, automotive, tractors and other parts require light weight, but the reliability requirements are increasingly high, the important process is the use of shot blasting process to improve the strength and fatigue strength of the components.