Surface plastic deformation method for increasing the wear resistance of fire grates in fiber separating machines

The article covers materials on the influence of the wear resistance of cast iron grates of fiber separating machines on the technological clearance between them in the mentioned above grate. It has been shown that the main criterion for the performance of grate bars is their wear resistance, and at the same time, the amount of grate wear should be limited by the required technological clearances in the working part of the grate. It has been revealed that the method of surface plastic deformation can be used to create hardening (strain hardening) of the surface layer in order to increase the wear resistance of cast iron grates. For this purpose, a substantiation for strengthening technology for grate bars in the form of shot-impact treatment with microballs with a diameter of 0.3-0.4 mm, directed at the strengthening surface at an angle of 900 at a compressed air pressure of 0.3-0.4 MPa has been made. Based on data from experimental studies of the wear resistance of grates under production conditions, the values of their one-sided wear for hardened gin and linter grates have been obtained, which indicate a significant reserve of performance compared to grates without treatment.

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