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Multi-segment deep carburization method of large heavy-duty gear

A multi-stage, carburizing technology, applied in the field of heat treatment, can solve the problems of high energy consumption, the carburized layer on the surface of the gear is prone to produce large blocks, network carbides, and long time, so as to improve production efficiency and achieve remarkable technical effects , Improve the effect of metallographic structure

Active Publication Date: 2015-05-20
CRRC QISHUYAN INSTITUTE CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an optimized method for the existing deep carburizing method for large heavy-duty gears, which takes a long time, consumes a lot of energy, and the carburized layer on the surface of the gear is prone to produce large block and reticular carbides. Deep carburizing heat treatment method for large and heavy-duty gears

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  • Multi-segment deep carburization method of large heavy-duty gear
  • Multi-segment deep carburization method of large heavy-duty gear

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Embodiment Construction

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0031] The invention discloses a multi-stage deep carburizing method for large heavy-duty gears, such as figure 1 shown, including the following steps:

[0032] 1) Put large and heavy-duty gear parts in a carburizing furnace and heat to 910±10℃;

[0033] 2) Carry out the first intensive carburizing of gear parts in the carburizing furnace, the furnace temperature is maintained at 910±10℃, the holding time is 5-6 hours, and the carbon potential C...

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Abstract

The invention provides a multi-segment deep carburization method of a large heavy-duty gear. The method comprises the following steps of primary intensive carburization, primary diffusion, secondary intensive carburization, secondary diffusion, cooling, quenching, washing, tempering, discharging from a furnace and air cooling. The deep carburization thermal treatment method for a gear type component, disclosed by the invention, adopts a multi-segment temperature-rising variable carbon potential method and can be used for effectively solving the problem that a large bulk of network carbide is easy to generate on a carburization layer on the surface of the gear, obtaining fine particle-like carbides distributed in a diffused manner, improving gold phase tissues on the surface of the gear, improving the hardness and wear resistance of the surface of the gear, also obtaining a high carburization speed, shortening the thermal treatment time, reducing the energy consumption and improving the production efficiency.

Description

technical field [0001] The invention relates to a deep carburizing heat treatment method and technology for iron and steel workpieces, in particular to a deep carburizing method for large heavy-duty gears, and belongs to the technical field of heat treatment. Background technique [0002] In order to obtain certain strength, toughness and wear resistance, gear parts need to be subjected to a series of heat treatments such as quenching and tempering, carburizing and quenching, and tempering. Large-scale heavy-duty gears have large size, heavy load bearing, strong impact force, and high safety performance requirements. They require excellent surface hardness, wear resistance and overload resistance during use. Therefore, the hardened layer of the gear tooth surface is required to be deep, and The metallographic structure of the gear surface is required to be good. [0003] At present, the deep carburizing method of large and heavy-duty gears basically adopts two-stage carburi...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23C8/22
Inventor 刘聪敏陈强王晓华李玉
Owner CRRC QISHUYAN INSTITUTE CO LTD
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