Which is better, sand blasting or shot blasting

Generally, shot blasting or sand blasting is often said to be high-efficiency, but there will be blind areas. Sand blasting is more convenient, but the driving force is expensive. Dalian sand blasting

High pressure wind is used as the driving force for sand blasting, while shot blasting is generally shot out of steel sand by high-speed running water pump flywheel. The process performance of castings obtained by shot blasting is not as good as that of sand blasting, but it is more economical than that of sand blasting. And it can remove some slag inclusions that cannot be removed from castings, which is not good for sand blasting.

1. Shot blasting and sand blasting are all metal surface treatment, but it does not mean that shot blasting is only for castings.

2. The key role of sand blasting is surface antirust treatment and oxide scale removal. For example, for parts after heat treatment process, shot blasting has many effects and functions: not only antirust treatment and oxide scale removal, but also improve the roughness, remove the machined burrs of parts, remove the thermal stress of parts, reduce the deformation of parts after heat treatment process, improve the wear resistance and stress working capacity of parts surface, etc.

3. There are many processing technologies for shot blasting, such as casting, steel casting, surface treatment of parts after machining, surface treatment of parts after heat treatment, etc.

4. Sand blasting is mainly manual operation, while shot blasting automation technology and automatic assembly line are more.

5. The steel balls and iron balls commonly used in shot blasting are not actually shot in the real sense. To be precise, they are small stainless steel wires or small steel rods. They only look like meatballs after being applied for a period of time. To put it bluntly, the sand for sandblasting was originally thought to be worn, that is, river sand. They are no different from those used in engineering. Only the sand used for sandblasting has been screened, the amount of sand is small, and the particle size is small. Naturally, some fields are also different. For example, in the field of ships, shot blasting uses real steel balls, and sand blasting uses metal ore (not river sand quartz sand).

Sand blasting antirust treatment also has this practical effect, but the difference is that the raw materials used for sand blasting are mostly high toughness sand (such as quartz sand) or copper fly ash, and they are also manually made for actual operation, and the speed of shot blasting is slow. Moreover, if sand is used, the collision between sand and prefabricated components will cause some sand powder during the whole process of sand blasting, which will adhere to the surface of prefabricated components, Moreover, the roughness of prefabricated components by sand blasting is less than that by shot blasting