Technological Features Hardening Of The Case Of The Roller Track Of The Transport Machine By Ball Knurling Tool And Cartooning With Microballs

Abstract

The influence of the hardening method of processing by surface plastic deformation with a ball knurling tool for the integrated provision of the quality indicators of the surface layer of the part of the roller track holder (ORD) of transporting machines and the complex hardening with steel balls and cartooning with glass balls that improve the operational characteristics of the surface layer and resistance to abrasive wear and the formation of surface corrosion ORD layer of transporting machines operating in an active environment, made of alloyed steel 20KhGSA and its substitute 30KhGSA. Workpieces belong to grade steels and alloys. Various parts of machines operating with alternating loads at temperatures up to 2000C are made from it. Observed by the operated OSD to the application of a treatment method that protected from external impact loads.

The purpose of this work was to evaluate the effectiveness of hardening the ORD transporting machines made of alloyed grade steel grade 20KhGSA with glass beads, and to develop a technology for complex hardening of the ORD with thin edges. To achieve this goal, the tasks of hardening the surface layer of the OSS with steel and glass balls in the optimal mode, assessing the quality parameters of the surface layer and testing them for fatigue and corrosion resistance were solved.

The technology of hardening the surface layer of the ORD of transporting machines was carried out on a lathe in the established mode of processing PPD.

   Thus, caricaturing with glass beads with small efforts of the surface of the part, after rolling with ball deforming tools, ensures the formation of favorable characteristics of the surface layer and without the formation of overhardening, successfully destroys the microdefects of the surface layer formed at the previous stages of the technological pass, and is also accompanied by a noticeable increase in the endurance limit and dominated by the fact of finishing by manual polishing.