Shot - peening and sand - blasting technology, simply put, is to use a high - speed rotating impeller or compressed air to project or spray shot or sand onto the surface of a workpiece. Through the impact and friction of the shot or sand, the purposes of surface cleaning, strengthening, or processing are achieved. According to different application methods, it can be divided into two main forms: shot - peening and sand - blasting. Shot - peening mainly uses a high - speed rotating impeller to throw shot, with a speed generally ranging from 50 to 100 m/s. Sand - blasting, on the other hand, uses compressed air to spray shot or sand onto the workpiece surface, with a slightly lower speed, generally from 30 to 50 m/s.

Applications

1. Cleaning of Metal Surfaces

(1) Cleaning of Casting Surfaces

(2) Cleaning of Forgings and Heat - treated Parts

(3) Metallurgical Iron and Steel Production

(4) Cleaning of Steel Plates, Steel Sections, and Steel Structural Parts

2. Strengthening of Metal Workpieces

3. Surface Processing

(1) Strengthening of Cutting Tools and Blades

(2) Improvement of Metal Surface Roughness