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A rapid carburizing heat treatment process for drive gears used in automobile differentials

A technology of automobile differential and driving gear, which is applied in the field of rapid carburizing heat treatment process, can solve the problems of affecting large production output, taking a long time, and low production efficiency, so as to improve carburizing efficiency, reduce carburizing cost, The effect of improving production efficiency

Active Publication Date: 2018-05-29
JIANGSU BAOJIE FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The heat treatment process disclosed in this patent uses four times of strong infiltration and four times of diffusion in the carburizing process, which takes too long time, at least 760 minutes, and the heating time is also long, the energy consumption is too high, and the production efficiency is too high. Low, which seriously affects the output of industrialized large-scale production

Method used

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Examples

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Embodiment Construction

[0034] The following examples are used to illustrate the present invention, but cannot 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 implementation conditions not described are usually conventional experimental conditions.

[0035] The fast carburizing heat treatment process for driving gears for automobile differentials provided by the present invention includes the following steps:

[0036] 1) heating up

[0037] Take the carburizing furnace, set up several vent holes on the surface of the furnace cover that can control the degree of closure, raise the furnace temperature to 750~800℃, add methanol dropwise into the furnace, the dropping rate is 180~200 drops / min, and continue to heat up to 830 ~840℃, start adding kerosene dropwise, the kerosene dripping acceleration is 240~260 drops / min, when the furnace temperature rises to 920~930℃, put the drivin...

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Abstract

The invention provides a rapid carburizing heat treatment process for a driving gear used in an automobile differential, comprising the following steps: 1) heating up; 2) strong infiltration; 3) diffusion; 4) quenching; 5) cleaning; 6) tempering. The carburizing period of the treatment process is obviously shortened, the production efficiency is improved, the output is increased, the energy saving effect is achieved, the carburizing cost is obviously reduced, and the economic benefit is significantly improved.

Description

Technical field [0001] The invention relates to a fast carburizing heat treatment process for a driving gear for an automobile differential. Background technique [0002] The automobile differential can make the left and right (or front and rear) driving wheels realize a mechanism that rotates at different speeds. It is mainly composed of left and right half shaft gears, two planetary gears and a gear carrier. The function is to make the left and right wheels roll at different speeds when the car is turning or driving on uneven roads, that is, to ensure the pure rolling motion of the driving wheels on both sides. The differential is installed to adjust the difference in the rotational speed of the left and right wheels. In four-wheel drive, in order to drive the four wheels, all the wheels must be connected. If the four wheels are mechanically connected, the car cannot rotate at the same speed when driving in a curve, in order to allow the car to travel in a curve. The rotatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/18C23C8/46
Inventor 吕景林赵剑忠
Owner JIANGSU BAOJIE FORGING
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