Carburizing and quenching heat treatment process of driven reverse gear used for transmissions

An automobile gearbox, carburizing and quenching technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of reducing fatigue resistance, reducing wear resistance, and high carburizing temperature, so as to improve the surface hardness of gears and prevent black Effects of tissue generation, carbon potential and furnace temperature reduction

Inactive Publication Date: 2015-12-23
JIANGSU BAOJIE FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing carburizing process has the following disadvantages: 1. The carburizing temperature is high, the time is long, and the energy consumption is large; 2. The deformation is large; 3. There are black structures, resulting in low hardness, reducing fatigue resistance, and reducing wear resistance resistance, shorten the service life
However, this patent only uses the carburizing method to heat-treat the gear surface, and the carburizing method is single. Due to the high carburizing carburizing potential, the a

Method used

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Embodiment Construction

[0033] The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention. The implementation conditions used in the examples can be further adjusted according to the manufacturer's conditions, and the unspecified implementation conditions are usually conventional experimental conditions.

[0034] A carburizing and quenching heat treatment process for reverse gear slave teeth of an automobile transmission provided by the present invention comprises the following steps:

[0035] 1) Carburizing

[0036] Put the reverse gear from the gear into the carburizing furnace. There are a number of exhaust holes on the carburizing furnace cover. The furnace temperature is 940~950°C. The carburizing agent is passed into the carburizing furnace to form a carburizing atmosphere. The carburizing process In the stage of high carbon potential strong infiltration, the carbon potential CP is 1.5±0.03C%, and in the stage of low ...

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Abstract

The invention provides a carburizing and quenching heat treatment process of a driven reverse gear used for transmissions. The process comprises the following steps: 1) carburizing; 2) carbonitriding; 3) quenching; 4) cleaning; and 5) tempering. The heat treatment process has the beneficial effects that the surface of the driven reverse gear is treated by carbonitriding; and carburizing and nitriding are combined, thus improving the quality of the surface of the driven reverse gear, improving the production efficiency, reducing the energy consumption and saving the production cost.

Description

technical field [0001] The invention relates to a carburizing and quenching heat treatment process for reverse gear slave teeth used in automobile gearboxes. Background technique [0002] Automobile transmission (transmission) has the following functions: 1) Change the transmission ratio, expand the variation range of driving wheel torque and speed, so as to adapt to the frequently changing driving conditions, and at the same time make the engine operate at a favorable power (higher power and lower fuel consumption) Work under working conditions; 2) When the engine rotation direction remains unchanged, the car can run backwards; 3) Use the neutral gear to interrupt the power transmission, so that the engine can start and change gears, and it is convenient for the transmission to shift gears or perform power output; 4) Speed ​​changer is made up of speed change transmission mechanism and operating mechanism, and power take-off can also be installed when necessary. There are ...

Claims

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Application Information

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IPC IPC(8): C23C8/22C21D1/18C21D9/32C23F17/00
Inventor 吕景林赵剑忠
Owner JIANGSU BAOJIE FORGING
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