From the empirical experimental results obtained from the hammering of metals, from Ur gold to cross swords to hundreds, thousands and today millions of tests, it can be safely stated that the process improves the qualities surface metallurgical when properly applied. A good application understands a precise specification of what should be done and it has been found that the optimum is within a narrow range. More or less, they are undesirable in almost all cases.

It is common in the history of industrial development for important inventions to have been discovered but for many years to have been scarce and irregularly used. Rediscovered by the scientific community, they were quickly elaborated and disseminated, becoming internationally renowned.

The wide use of the shot peening blasting process results from a number of factors that make it rigorously controllable and repeatable.

1 – Of course, an effective hammering effect can only be obtained with angular shapes. Sharp edges would mark or cut metal surfaces, striking them irregularly and destructively. It is intuitive that this effect should be achieved with impacts from rounded or preferably spherical surfaces as they are more regular. Spherical metal shot (ff, steel, steel, stainless steel, aluminum, copper, etc.) and glass balls are available internationally, and nationally produced the highest quality of great quality.

2 – With the use of blasting, isolated hammers are replaced by numerous small impacts that ensure uniform coverage of the entire area hit.

3 – Modern equipment, using suction guns, jet nozzles or turbines, ensures that particle acceleration is tightly controlled and repeatable.

4 – By associating speed with particle size (diameter) and material density, all precisely selectable, we arrive at the concept of penning intensity and the conclusion that with blasting it can be controlled and reproduced.

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