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Thermal treatment deformation control method for duplicate spiral bevel gear

A spiral bevel gear, heat treatment deformation technology, applied in the field of heat treatment, can solve the problems that cannot be realized, cannot meet the deformation requirements, etc., and achieve the effect of reasonable process technology and remarkable control deformation effect

Active Publication Date: 2015-02-25
HARBIN DONGAN ENGINE GRP
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AI Technical Summary

Problems solved by technology

The heat treatment technology currently used cannot meet the requirements of two types of carburized layer depths in the two regions, and at the same time cannot meet the required deformation requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] The deformation control of duplex gears in a helicopter transmission system during heat treatment requires the effective penetration depth of X1 area (1.47~1.68) mm, HRC60 depth ≥ 0.65 mm, and effective penetration depth of X2 area (1.05~1.25) mmHRC60 The depth is ≥0.5mm, and the cone angle deformation on both sides of the part does not exceed ±10'.

[0040] (1) Roughly machine the large tooth root cone before heat treatment, and leave a compensation allowance of 0.2mm after machining;

[0041] (2) Protect all areas of the part except the large tooth area by copper plating, and the thickness of the copper layer is 0.04mm;

[0042] (3) Use a sand blower to clean the carburized surface of the parts, the sand blowing pressure is 0.25Mpa, until the parts are off-white, and then carburize in 45 minutes;

[0043] (4) Place the parts in a double-chamber carburizing furnace, with the large tooth area facing down when the furnace is loaded, and the distance between the large to...

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PUM

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Abstract

The invention relates to a thermal treatment deformation control method for a duplicate spiral bevel gear. By carburizing on a component for twice, a problem that carburizing layers of different parts of the component are different in depth is solved, and the conventional quenching mode is changed; allowance is reserved during machining, and the machining allowance is changed into deformation compensation dosage under the action of quenching pressure of a mould on the top of the bevel gear, so that the carburizing layer precision of the duplicate spiral bevel gear is controlled within 0.1mm, and the + / -10' error control on taper angle at two sides is realized. The thermal treatment deformation control method disclosed by the invention is reasonable in process technology, remarkable in deformation control effect, and capable of providing a novel thought for deformation control of similar products.

Description

technical field [0001] The invention relates to a heat treatment method, in particular to a heat treatment method for deformation control of 9310 steel duplex gear parts. Background technique [0002] 9310 steel is an excellent carburizing steel. The steel has high hardenability. After carburizing-quenching-low temperature tempering, not only the surface can obtain high hardness, but also the strength, toughness and plasticity of the core are also very good. At the same time, the cutting performance of this steel is excellent. It is often used to manufacture various gears, shafts and other parts. It is one of the commonly used carburizing steel materials in many models in our country. [0003] However, the material deforms greatly during the heat treatment process, and the severe deformation of the parts manufactured using it during the heat treatment process has a serious impact on subsequent machining, especially for parts with complex shapes and asymmetric structures, so...

Claims

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Application Information

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IPC IPC(8): C21D9/32C23F17/00
Inventor 周动林辛玉武宋兴武赵兴福曾西军金玉亮
Owner HARBIN DONGAN ENGINE GRP
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