Tips and features of steel shot for shot blasting machine

　　1. Steel shot is an important material for shot blasting machine in metal surface treatment. Among many metal surface treatment abrasives, steel shot is the most used and most cost-effective one. Since steel shot is consumed in the shot blasting process and is a consumable, it is very necessary to fully consider how to reasonably evaluate the quality of steel shot and use it correctly.

　　2. Common standards for shot material quality inspection: SAEJ441 wire cut shot standard, SAEJ444 cast steel shot standard, SAEAMS2431/1-8 eight shot material inspection standards.

　　3. Shot material inspection items: hardness, size, shape

　　4. Shot material inspection instruments and methods:

　　4.1 Hardness

　　Inspection process: inlay (high temperature inlay or resin solidification) - grinding - hardness

　　4.2 Size

　　Inspection process: select the screen according to the standard - select the shot - pour into the multi-layer screen and shake the screen - weigh each layer of the screen - judge against the standard

　　4.3 Shape

　　Inspection process: select the specified field of view - stick the test shot - observe with a magnifying glass - count the critical number and the number of unqualified.

　　5. In terms of properties, the hardness of the steel shot determines the service life of the steel shot. The hardness of the steel shot is proportional to the cleaning speed. The higher the hardness, the faster the cleaning speed, the greater the consumption of the steel shot, and the shorter the life; the size and shape distribution of the steel shot determine the roughness of the surface after cleaning. The larger the diameter, the higher the surface roughness after cleaning, but the work efficiency is also high, and the wear is also greater relative to the steel shot. Evaluating the hardness, size, and shape of the shot and adopting the correct shot blasting process will greatly reduce the cost of using the shot blasting machine and improve the efficiency of shot blasting.

　　6. In general, steel shots used in industry should be selected well. The selection criteria are: moderate hardness and uniform size. Only such specifications can extend the service life. The scope of use of steel shots is very wide. The automotive industry; sandblasting/painting companies; consumer goods manufacturing; container manufacturing/repair; casting; granite/stone cutting; shipbuilding and ship repair; oil and gas pipelines; factory maintenance and metal processing all use steel shots for surface treatment and grinding to varying degrees. Therefore, it is necessary to provide the best solution according to various special applications.