Detailed introduction of the difference between shot blasting and sand blasting (I)

Shot blasting and sand blasting (shot) are two surface treatment methods of polishing. The following is a detailed introduction of the difference between these two treatment methods by the new materials of dahong.

Shot blasting is to use high-speed rotating impeller to hurl small steel or iron pellets into the surface of parts at high speed, so the oxide layer on parts can be removed. At the same time, steel pellets or iron pellets strike the surface of parts at high speed, causing lattice distortion and deformation on the surface of parts and increasing surface hardness, which is a method to clean the surface of parts. Shot blasting is often used to clean the surface of castings or to strengthen the surface of parts.

MIM technologists have found that shot blasting is generally used for regular shape and so on.

Repair, shipbuilding, blasting, sandblasting is commonly used. But both blasting and sandblasting are in the form of compressed air. Of course, it is not necessary to use high - speed rotating impeller. In the repair, shipbuilding industry in general, blasting (small steel shot) in the pretreatment of steel plate (painting before derusting); Sandblast (mineral sand for repair and shipbuilding) is often used on shaped ships or sections to remove old paint and rust from steel plates and repaint them. In repair, shipbuilding, blasting, sandblasting the main role is to increase the adhesion of steel paint.

As a matter of fact, dahong new material does not only use shot blasting to clean casting pieces, but also does sand cleaning for large pieces first. It means to remove the risers of casting pieces and put them inside the drum to roll.

The size of the pellet is 1.5mm.

Big macro new materials according to the study, in terms of damage, metal material surface tensile stress is easier than compressive stress, when the surface is compressive stress, the fatigue life of material is greatly increased, therefore, metal powder injection molding (MIM) manufacturer to remind everybody for axial parts such as easy to fatigue fracture usually adopts shot peening forming surface compressive stress, increase product life, in addition, the metal material is sensitive to stretch, this is the tensile strength of the material is lower than the compression strength of many reasons, this also is metal material tensile strength (yield, tensile) is commonly used in the cause of the said material performance. For example, the working surface of the steel plate of the car we ride in daily is reinforced with shot peening, which can significantly improve the fatigue strength of the material.

The big big new material about the difference between shot blasting and sandblasting is introduced here for the time being.