Research On Erosion Wear Mechanisms Of Ceramic Sandblasting Nozzles Using FEA Methods

The sandblasting nozzle is one of the key components on mechanical device, widely applied to machinery, petroleum, chemical industry, automobile, ships and metallurgy, simultaneously is the main wear-resisting vulnerable part. At present in sand blasting processing, the ceramic sandblasting nozzle is widespread applied. The process of erosion may result in material loss and damage. Research on erosion wear of ceramic sandblasting nozzle, is vitality significant to controlling and reducing the erosion wear for enhancing its service life.Based on the sand blasting processing craft, the mode of abrasive particles'motion is researched in this paper. According to classification of collision, low speed is under 250m/s. So it is determined that abrasive particles impacting the nozzles can be examined using the laws of low speed particle collision. According to the blast-gun and the sandblasting nozzle concrete structure, the single particle erosion model is developed. The theoretical analysis to the sandblasting nozzle stress is studied. The FEA software ANSYS is used to analyses erosion process and stress field distribution in the nozzle using erosion theory of brittle materials. Various factor's influence on the erosion of the nozzle is researched from the perspective of sand blasting to provide the instructions for prolong the service life.The FEA software is used as the research method. The finite element simulation to the specific structure and the material sandblasting nozzle is carried on. The SiC abrasive and B4C ceramics target as the example is studied .If the erosion process can be modeled analytically, in a very generic way, then they can be used to make a parametric study. The current work is focus on developing a computational model for a erosion system. A 3-D finite element model is developed using a commercial package and a transient dynamic analysis performed in order to predict the effects of erosion. By using the resulting simulation data, the erosion process of the nozzle is described in detail with erosion theory of brittle materials. Using suitable failure criteria, the amount of target lost in the erosin system is predicted for various parameters like velocity, angle of attack, size of erodent, etc. The result of this study shows that volume loss for various angles of attack is that of typical brittle erosion. The volume loss has three different ranges with increase in velocity.There are two innovative points in this paper. The erosion process of the nozzle is studied from the perspective of impact and stress field. The other is, using the the 3-D finite element model ,various factor's influence on the erosion of the nozzle is researched from the perspective of sand blasting to provide the instructions for prolong the service life.