Equipment and method for induction hardening in inner-bore carburization treatment

Abstract

The invention discloses equipment and a method for induction hardening in inner-bore carburization treatment. The equipment mainly comprises an inner gear part, a locating tray, a heating sensor and a cooling device, wherein the heating sensor comprises an induction coil and a magnetizer; the inner gear part is arranged at the upper end of the locating tray; the locating tray is arranged at the upper end of the heating sensor; the heating sensor is arranged at the upper end of the cooling device; the cooling device is arranged at the bottom end of the equipment for the induction hardening in the inner-bore carburization treatment; the induction coil is arranged between the left and right sides of the heating sensor; the magnetizer is arranged outside the inner side of the induction coil. The method comprises the steps of carburization, cooling of a protective atmosphere, vacuum tempering, high-frequency induction hardening of inner bores, cold quenching and low-temperature tempering. The equipment disclosed by the invention can be used for realizing the performances of low hardness of the overall parts and high hardness of the inner bores, guaranteeing that the hardness of a non-carburized part is 22HRC to 26HRC and realizing the technical application requirements on low hardness of the non-carburized part and high hardness of carburizing surfaces of the inner bores of a 18Cr2Ni4WA material.

Description

technical field [0001] The invention belongs to the technical field of heat treatment carburizing and quenching, and in particular relates to an induction quenching device and method for inner hole carburizing treatment. . Background technique [0002] The internal gear ZG-0101 is an important part of a transmission system, and its constituent material is 18Cr2Ni4WA, which is a typical carburizing steel. The φ60.5 inner hole is matched with the bearing, which requires wear resistance, and the rest requires good toughness. According to the requirements of use, the hardness of the parts is designed as follows: φ60.5 inner hole is carburized and quenched, the hardness is 58-62HRC, the depth of the carburized layer is 2.2-2.6mm, and the hardness of the rest is 22-26HRC. After using the traditional HB / Z159 carburizing and quenching process, the hardness of the non-carburized part of the part is 35-45HRC, which cannot meet the performance requirements. It is required to design a...

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Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide a kind of inner hole carburizing treatment induction hardening equipment and method, aiming to solve the problem that the traditional heat treatment carburizing and quenching technology has complicated processing process and cannot meet the performance requirements

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