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Rapid carburizing heat treatment technology of driving gear for automobile differential mechanism

A technology for automotive differentials and drive gears, applied in metal material coating processes, coatings, solid-state diffusion coatings, etc., can solve problems affecting large production output, low production efficiency, and long time-consuming, and achieve improvement Effects of carburizing efficiency, increased pressure, and reduced carburizing cost

Active Publication Date: 2015-12-16
JIANGSU BAOJIE FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Embodiment Construction

[0034] 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.

[0035] A kind of rapid carburizing heat treatment process of driving gear for automobile differential provided by the present invention comprises the following steps:

[0036] 1) heating up

[0037] Take the carburizing furnace, set a number of exhaust holes on the surface of the furnace cover that can control the closure degree, raise the temperature of the furnace to 750~800°C, add methanol dropwise into the furnace at a dropping rate of 180~200 drops / min, and continue to raise the temperature to 830°C ~840°C, start to drop kerosene, the kerosene dropping rate is 240~260 drops / min, wait for the furnace temperature to ri...

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Abstract

The invention provides a rapid carburizing heat treatment technology of a driving gear for an automobile differential mechanism. The rapid carburizing heat treatment technology comprises the following steps of 1, heating, 2, intensive carburization, 3, diffusion, 4, quenching, 5, cleaning and 6, tempering. According to the treatment technology, the carburizing period is obviously shortened, production efficiency is improved, the yield is increased, the energy-saving effect is achieved, the carburizing cost is obviously reduced, and economical benefits are significantly improved.

Description

technical field [0001] The invention relates to a rapid carburizing heat treatment process for a driving gear used in an automobile differential. Background technique [0002] A vehicle differential is a mechanism that enables the left and right (or front and rear) drive wheels to rotate at different speeds. It is mainly composed of left and right side 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 an uneven road, that is, to ensure the pure rolling motion of the driving wheels on both sides. The differential is installed to adjust the speed difference between 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 together, the car cannot rotate at the same speed when driving in a curve, in order for the car to drive in a curve The rotation speed is...

Claims

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Application Information

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IPC IPC(8): C21D1/18C23C8/46
Inventor 吕景林赵剑忠
Owner JIANGSU BAOJIE FORGING
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