Machining technology capable of increasing compressive stress depth of surface of rolling wheel

• Main Authors: LIU MANFEI, ZHANG TIANYI
• Format: Patent
• Language: Chinese; English
• Published: 14.07.2020
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention relates to a processing technology capable of increasing compressive stress depth of the surface of a rolling wheel. The machining technology comprises the following steps of rough turning, heat treatment, excircle rough grinding, shot blasting, and two-end-face grinding, wherein fine grinding on an excircle and a middle hole is conducted by using a double-disc grinder to machine theexcircle and the middle hole into the size of a finished product in the two-end-face grinding step. Compared with a conventional machining technology of the rolling wheel, a shot-throwing process isadded after rough grinding on the excircle is conducted, steel shots with a diameter of 0.5mm are used to continuously impacts the surface of the rolling wheel in a shot blasting machine to greatly enhance the surface compressive stress of the rolling wheel, a compressive stress hardened layer with sufficient depth is obtained, meanwhile, too many hardened layers cannot be consumed in subsequent machining, and the abrasion