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Composite pre-treatment technology for improving wind power gear gas carburizing efficiency

A gas carburizing and pretreatment technology, used in heat treatment furnaces, heat treatment equipment, metal material coating processes, etc., can solve problems such as technical research, achieve good hardness gradient, shorten carburizing time, and increase carburized layer thickness. Effect

Inactive Publication Date: 2018-08-03
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether the combination of the two can significantly improve the efficiency of gas carburizing has certain exploration value, and there is no technical research on this aspect at present

Method used

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  • Composite pre-treatment technology for improving wind power gear gas carburizing efficiency
  • Composite pre-treatment technology for improving wind power gear gas carburizing efficiency
  • Composite pre-treatment technology for improving wind power gear gas carburizing efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Process 20CrMnMo steel into M8 tooth-shaped samples;

[0026] (2) The sample is subjected to quenching and tempering treatment. First, the temperature is raised to 860°C for 15 minutes, then the sample is immediately put into oil to cool, and then the temperature is raised to 670°C for 30 minutes. Cool to room temperature after taking out;

[0027] (3) Place the sample on the YS05-C20A laser shock strengthening test platform, set the laser wavelength to 1064nm, and the spot diameter to φ3mm. The surface of the sample uses 100μm black tape as the energy absorption layer, and the spot overlap rate is 50%. The pulse width is 10ns, and the laser energy is 3J to perform laser shock on the sample;

[0028] (4) Put the sample after laser shock into the multi-purpose furnace, raise the temperature of the furnace to 300°C, let in air, and pre-oxidize for 30 minutes.

[0029] (5) Heat the multi-purpose furnace to 800°C, keep it warm for 2 hours, maintain 0.4% carbon potenti...

Embodiment 2

[0033] (1) Process 20CrMnMo steel into M8 tooth-shaped samples;

[0034] (2) The sample is subjected to quenching and tempering treatment. First, the temperature is raised to 860°C for 15 minutes, then the sample is immediately put into oil to cool, and then the temperature is raised to 670°C for 30 minutes. Cool to room temperature after taking out;

[0035] (3) Place the sample on the YS05-C20A laser shock strengthening test platform, set the laser wavelength to 1064nm, and the spot diameter to φ3mm. The surface of the sample uses 100μm black tape as the energy absorption layer, and the spot overlap rate is 50%. The pulse width is 10ns, and the laser energy is 10J to perform laser shock on the sample;

[0036] (4) Put the sample after laser shock into the multipurpose furnace, raise the temperature of the furnace to 300°C, let in air, and pre-oxidize for 30 minutes.

[0037] (5) Heat the multi-purpose furnace to 800°C, keep it warm for 2 hours, maintain 0.4% carbon potenti...

Embodiment 3

[0041] (1) Process 20CrMnMo steel into M8 tooth-shaped samples;

[0042] (2) The sample is subjected to quenching and tempering treatment. First, the temperature is raised to 860°C for 15 minutes, then the sample is immediately put into oil to cool, and then the temperature is raised to 670°C for 30 minutes. Cool to room temperature after taking out;

[0043] (3) Place the sample on the YS05-C20A laser shock strengthening test platform, set the laser wavelength to 1064nm, and the spot diameter to φ3mm. The surface of the sample uses 100μm black tape as the energy absorption layer, and the spot overlap rate is 50%. The pulse width is 30ns, and the laser energy is 10J to perform laser shock on the sample;

[0044] (4) Put the sample after laser shock into the multipurpose furnace, raise the temperature of the furnace to 300°C, let in air, and pre-oxidize for 30 minutes.

[0045] (5) Heat the multi-purpose furnace to 800°C, keep it warm for 2 hours, maintain 0.4% carbon potenti...

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Abstract

The invention relates to a composite pre-treatment technology for improving wind power gear gas carburizing efficiency. The composite pre-treatment technology comprises the following steps that carburizing steel is machined and cut into a sample; the sample is subject to thermal refining; the sample is placed into a laser shock peening testing platform for laser shock; and the sample obtained after laser shock is placed into a multi-purpose furnace for pre-oxidation treatment, and then carburization, quenching and tempering are carried out. The composite pre-treatment technology has the beneficial effects that laser shock and pre-oxidation treatment are carried out before gas carburizing is carried out, an oxidation film is generated on the surface of the sample, the oxidation film can berestored gradually in the carburization process to form loose and porous diffusion channels, in addition, as strain strengthening is generated under the laser shock effect, dislocation density in microstructures is increased, grain refinement is achieved, defects like high density dislocation provides more absorbing centers and diffusion channels for carbon atoms in the carburization process, thegas carburization efficiency is obviously improved, the carburization time can be greatly shortened under the condition that the same carburization layer depth is obtained, energy sources are saved, and the production cost is reduced.

Description

technical field [0001] The invention relates to a compound pretreatment process for improving the gas carburizing efficiency of wind power gears. Background technique [0002] Wind power gears are the key components of wind power generators. Because wind power generators are generally placed in wilderness, field, mountain pass, seaside and other places with high wind energy and no shelter around, the natural environment is harsh, transportation is inconvenient, and repair is very difficult. Wind power gears Once a failure occurs, it will seriously affect the economic benefits of the wind farm, so high requirements are placed on the reliability and working life of the gear. [0003] At present, in the surface hardening technology of gears at home and abroad, carburizing treatment has always been the preferred process for strengthening wind power gears due to the maturity of the technology and the development of supporting technologies such as temperature control and carbon po...

Claims

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Application Information

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IPC IPC(8): C23C8/02C23C8/34C21D10/00C21D9/32
CPCC23C8/02C21D9/32C21D10/005C23C8/34
Inventor 胡静宋璐贾蔚菊顾晓明
Owner CHANGZHOU UNIV
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