Heat treatment method for gearbox gear on rare earth carburization equipment

A heat treatment method and gearbox technology, applied in heat treatment furnaces, heat treatment equipment, coatings, etc., can solve the problems of long carburizing heat treatment production cycle, high product production cost, thermal distortion of gears, etc., and achieve easy metallographic structure and production The effect of short cycle time and fast carburizing speed

Inactive Publication Date: 2019-08-16
XUZHOU XIANGQIAO MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, transmission gears are generally produced by continuous gas carburizing automatic production lines. However, due to the long production cycle, high temperature and high power of the equipment for carburizing heat treatment, the energy consumption is large, the production cost is high, and the carburizing process of heat treatment still exists Some problems such as carburizing and quenching and gear thermal distortion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, a kind of heat treatment method of transmission gear on rare earth carburizing equipment, comprises the following steps:

[0015] (1) Wash for 5 minutes under the condition of alkaline water temperature of 60°C, then place it on the tray of the pretreatment furnace of the double-row rare earth carburizing equipment, and perform pretreatment under the condition of 450°C, and the pretreatment time is 115min;

[0016] (2) Send the gearbox gear pretreated in step (1) to the heating zone of the carburizing furnace. The temperature in this zone is 880°C for preheating, and the preheating time is 290 minutes. During this period, nitrogen is input into the furnace every 3 cubic meters per hour;

[0017] (3) After the preheated gear in step (2) enters the strong infiltration zone 1, the pre-carburization is carried out under the condition that the temperature in this zone is 925°C, the pre-carburization time is 295 minutes, and the carbon potential Cp is 1.40% duri...

Embodiment 2

[0023] A heat treatment method for transmission gears on rare earth carburizing equipment, comprising the following steps:

[0024] (1) Wash for 5 minutes under the condition of alkaline water temperature of 70°C, then place it on the tray of the pretreatment furnace of the double-row rare earth carburizing equipment, and perform pretreatment under the condition of 500°C, and the pretreatment time is 110min;

[0025] (2) Send the gearbox gear pretreated in step (1) to the heating zone of the carburizing furnace. The temperature in this zone is 900°C for preheating. The preheating time is 260 minutes. During this period, nitrogen gas is input into the furnace every 2 cubic meters per hour;

[0026] (3) After the preheated gear in step (2) enters the intensive infiltration zone 1, the pre-carburization is carried out under the condition that the temperature in this zone is 920°C, the pre-carburization time is 270 minutes, and the carbon potential Cp is 1.25% during this time per...

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PUM

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Abstract

The invention discloses a heat treatment method for a gearbox gear on rare earth carburization equipment. The heat treatment method comprises the following steps that cleaning and pretreating are conducted; preheating is conducted; pre-carburization is conducted; carburization is conducted; diffusion is conducted; and cooling and quenching are conducted, then cleaning is conducted for 5-6 minutesunder the condition that the alkaline water temperature is between 60 DEG C and 70 DEG C, tempering is conducted for 180 minutes under the condition that the temperature is 18 DEG C, shot blasting cleaning is conducted for 30 minutes, and the rare earth carburization heat treatment process of the gearbox gear is completed. According to the treatment method, the carburization speed is high, the production cycle is short, energy consumption is low, gear distortion after heating is small, and the precision is high.

Description

technical field [0001] The invention relates to a rare earth carburizing heat treatment method, in particular to a heat treatment method for transmission gears on rare earth carburizing equipment. Background technique [0002] At present, transmission gears are generally produced by continuous gas carburizing automatic production lines. However, due to the long production cycle, high temperature and high power of the equipment for carburizing heat treatment, the energy consumption is large, the production cost is high, and the carburizing process of heat treatment still exists Some problems such as carburizing and quenching and gear thermal distortion. Contents of the invention [0003] Aiming at the problems existing in the prior art, the present invention provides a heat treatment method for transmission gears on rare earth carburizing equipment. The treatment method has fast carburizing speed, short production cycle, low energy consumption, small distortion of gears aft...

Claims

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Application Information

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IPC IPC(8): C23C12/02C21D1/18C21D9/32
CPCC23C12/02C21D1/18C21D9/32
Inventor 孙文法高峰孙磊
Owner XUZHOU XIANGQIAO MACHINERY CO LTD
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