Cyclic carburizing treatment method for surface carburizing layer of heavy-duty gears

Abstract

The present application relates to a cyclic carburizing treatment method for a carburized layer on the surface of a heavy-duty gear. The surface of the gear to be treated is bombarded with supersonic particles before the gear to be treated is subjected to vacuum carburizing treatment, so that the surface of the gear to be treated is subjected to compound catalytic infiltration. The treatment causes plastic deformation on the surface of the gear to be treated, forming a composite modified layer with fine grains and many grain boundaries, which facilitates the diffusion and penetration of carbon atoms into the surface of the gear to be treated. After completing a cyclic carburizing cycle of composite catalysis-vacuum carburizing, by repeatedly performing multiple cyclic carburizing cycles of composite catalysis-vacuum carburizing, the surface of the gear to be treated generates a higher carbon concentration, a larger thickness, Carburized layer with strong surface hardness. The cyclic carburizing treatment method for the surface carburizing layer of a heavy-duty gear involved in the present application can obtain a higher carbon concentration, greater thickness, and greater surface strength and hardness in a relatively short period of time compared with the traditional atmosphere carburizing method. Carburized layer to meet the service requirements of heavy-duty gears.

Description

technical field [0001] The present application relates to the technical field of surface treatment of mechanical workpieces, in particular to a cyclic carburizing treatment method for the surface carburizing layer of heavy-duty gears. Background technique [0002] Heavy-duty gears are an important part of the mechanical transmission system. They are generally used in working environments with long working hours and high bearing capacity. During the transmission process, both power and torque must be transmitted. Therefore, it is very important to study the surface strengthening technology of heavy-duty gears. Relevant studies have shown that heavy-duty gears require higher surface carbon content to ensure the structural strength and surface hardness of heavy-duty gears. [0003] Carburizing is a method of surface treatment of mechanical workpieces. The specific method is to place the mechanical workpiece in an active carburizing medium, heat it to the temperature of the sin...

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Problems solved by technology

[0005] Based on this, it is necessary to provide a carburized layer on the surface of heavy-duty gears in view of the problems that the carburized treatment time is too long and the thickness of the carburized layer is not large enough when the traditional carburizing treatment method using atmosphere carburizing is applied to heavy-duty gears. Cyclic carburizing treatment method

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