The cleaning effect of the shot blasting machine on the workpiece is not only good, but also saves a lot of manpower and material resources. However, everything in the world has both advantages and disadvantages, that is, there are vulnerable parts in the shot blasting machine, and they should be replaced in time during use to prevent damage to the shot blasting machine. Vulnerable parts of shot blasting machine include: polishing head Directional sleeve 、 Shot distributing wheel , blade, side plate, top plate, end guard plate, chamber guard plate, etc. The materials used to produce these vulnerable parts are high chromium cast iron. With the increase of chromium content, the wear resistance of the materials has significantly improved. However, with the rapid development of the machinery industry, the requirements for the hardness and wear resistance of the materials have become increasingly high, so trace elements must be added. Cr: mainly to improve wear resistance; Mn: manganese can enter carbide and dissolve in matrix, stabilizing austenite; Si: Silicon is an element that reduces the hardenability, which should be controlled between 0.3% and 0.7% generally. The wear resistance of the material is poor, which may be due to the excessive silicon content and the insufficient hardenability.

Blade: made of high chromium special wear-resistant cast iron, with surface hardness of HRC60-65 after heat treatment, high wear resistance and service life, and weight difference of each group of blades ≤ 2g.

Directional sleeve: totally enclosed dial type, which can easily adjust the projection angle and direction. It is made of high chromium special wear-resistant cast iron, and its surface hardness is HRC60-65 after heat treatment

The shot separating wheel and various guard plates are made of high chromium special wear-resistant cast iron, and the surface hardness is HRC60-65 after heat treatment.

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