Method for manufacturing motorcycle gears from 20CrMo carburizing steel

The invention discloses a method for manufacturing motorcycle gears from 20CrMo carburizing steel, comprising the following processes of: forging stock, machining, thermal refining, shot blasting, machining, carburizing and quenching, tempering and shot blasting, wherein the thermal refining process...

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Bibliographische Detailangaben
Hauptverfasser:	YU XUEHUA, WANG GUANGAN, LI QUAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMISTRY GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention discloses a method for manufacturing motorcycle gears from 20CrMo carburizing steel, comprising the following processes of: forging stock, machining, thermal refining, shot blasting, machining, carburizing and quenching, tempering and shot blasting, wherein the thermal refining process comprises the following steps of: (1) quenching: heating a workpiece to 920+/-5 DEG C, insulating for 90 minutes and quenching; and (2) tempering: heating the workpiece after quenching to 690+/-10 DEG C, insulating for 150 minutes and cooling by water. By substituting thermal refining of the 20CrMo carburizing steel for the existing normalizing process, not only the cutting machining property of the 20CrMo carburizing steel is improved, but also deformation of the workpiece in the subsequent carburizing quenching process is better controlled, thus ensuring the machining accuracy of the workpiece.