Causes of blade wear of shot blasting machine accessories

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Causes of blade wear of shot blasting machine accessories

August 9, 2019 14:22:31, click:

Under the repeated impact of the projectile, the basic structure of the shot blasting machine blade deforms firstly, and the matrix structure on the surface layer produces extrusion flow, which causes hardening and even fracture under continuous impact. At this time, the carbide in the surface layer is exposed to the matrix due to the loss of matrix protection. Under the impact of the projectile, the carbide produces micro cracks, and the broken carbides lose the role of supporting the matrix. Moreover, it is easy to be impacted and lost by the projectile. The matrix is pulled out, leaving holes, which makes the matrix further flow deformation, and forms the wear of the material.


The blade of shot blasting machine is rotating at high speed, and the blade of shot blasting machine will be subjected to the pressure of projectile, which is also periodic pressure. Because the force acting on the blade of shot blasting machine is a periodic force, the blade of shot blasting machine also bears the periodic stress varying with time. Due to the static analysis, most of the blades of shot blasting machine are in low stress state, but there are stress concentration points.


The failure of shot blasting machine blade is the result of wear and fatigue. In the working process of the shot blasting machine blade, the basic structure deformation of the shot blasting machine blade occurs firstly, and the surface matrix structure produces extrusion flow, which starts from the stress concentration point of the shot blasting machine blade. Due to the repeated wear of the shot blasting machine blade, the deformation and material loss of the shot blasting machine blade are accelerated. Due to the repeated effect of periodic stress and the wear of projectile, the matrix damage accumulates, and finally leads to the fracture of shot blasting machine blade.


It can be said that the root of failure of shot blasting machine blade is stress concentration. If the stress concentration can be reduced, the service life of shot blasting machine blade will be improved.


Shandong Qingdao oulide shot blasting machinery Co., Ltd. service hotline: 0532-82120613 13573855822 Lu ICP Bei No. 17030284