Low-pressure vacuum carburizing method for 10CrNi2Mo3Cu2V material

A vacuum carburizing and low-pressure technology, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of poor repeatability and achieve the effect of improving repeatability and ensuring consistency

Pending Publication Date: 2020-09-11
HARBIN DONGAN ENGINE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is: to provide a kind of 10CrNi2Mo3Cu2V material low-pressure vacuum carburizing method, provide a kind of 10CrNi2Mo3Cu2V material low-pressure vacuum carburizing method, be used to guide the selection and formulation of 10CrNi2Mo3Cu2V material low-pressure vacuum carburizing process parameters, can effectively solve the carburizing layer depth The problem of relatively poor repeatability of the controllable atmosphere carburizing process on the surface of 0.3-2.0mm parts made of 10CrNi2Mo3Cu2V

Method used

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  • Low-pressure vacuum carburizing method for 10CrNi2Mo3Cu2V material

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Embodiment 1

[0022] Aviation gears for helicopter reducers are made of second-generation carburized gear steel 10CrNi2Mo3Cu2V, and the effective carburized layer depth after carburizing is 0.70-0.90mm. It is necessary to ensure the consistency of the carburizing layer depth of multiple carburizing batches. The specific implementation method is as follows:

[0023] Place the parts in a low-pressure vacuum carburizing furnace for carburizing, adopt the pulse carburizing method, and set the pulse intensive carburizing stage time t c For a fixed value, after carburizing, push it to the front room and air cool it.

[0024] The time t of the set pulse hyperosmotic phase c The value range is 0.7min, the pulse carburizing is adopted, and the number of pulses is 16. Each pulse first performs pulse infiltration, and then performs pulse diffusion. The diffusion time of the latter pulse is longer than that of the previous pulse. , the pulse diffusion time is greater than the pulse infiltration time,...

Embodiment 2

[0030] The aviation gear used for a helicopter reducer is made of second-generation carburized gear steel 10CrNi2Mo3Cu2V, and the effective carburized layer depth after carburizing is 0.90-1.10mm. It is necessary to ensure the consistency of the carburizing layer depth of multiple carburizing batches. The specific implementation method is as follows:

[0031] Place the parts in a low-pressure vacuum carburizing furnace for carburizing, adopt the pulse carburizing method, and set the pulse intensive carburizing stage time t c For a fixed value, after carburizing, push it to the front room and air cool it.

[0032] The time t of the set pulse hyperosmotic phase c The value range is 0.7min.

[0033] The pulse carburizing is adopted, the number of pulses is 16, and the effective depth of the carburizing layer is 0.90-1.10mm.

[0034] In the pulse carburizing described above, each pulse first performs pulse intensive infiltration, and then performs pulse diffusion.

[0035] The...

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Abstract

The invention relates to a low-pressure vacuum carburizing method for a 10CrNi2Mo3Cu2V material. A part is put in a low-pressure vacuum carburizing furnace; multiple pulses are adopted for carburizing; the pulse carburizing time tc of each pulse is set to be a definite value; and after carburizing is ended, the part is pushed to a front chamber for air cooling. According to the low-pressure vacuumcarburizing method for the 10CrNi2Mo3Cu2V material, the carburized layer depth ranges from 0.3 mm to 2.0 mm; the carburized part is in the carburizing atmosphere in the completely-saturated state allthe time; and thus, the depth consistency, achieved for carburized layer depths in different batches, of the same type of parts, is guaranteed. Repeatability of the 10CrNi2Mo3Cu2V material carburizing process is improved; the problem that the traditional controlled atmosphere carburizing process is affected by equipment stability and the environment, so that after a same part is carburized in different batches, the carburized layer depths are inconsistent is solved; and repeatability of the 10CrNi2Mo3Cu2V material carburizing process is improved.

Description

technical field [0001] The invention belongs to the technical field of metal heat treatment, and relates to a low-pressure vacuum carburizing method for 10CrNi2Mo3Cu2V material. Background technique [0002] 10CrNi2Mo3Cu2V second-generation carburized gear steel for aviation, with good temperature resistance and strong bearing capacity, is used to make aviation medium and heavy helicopter gears. In the depth simulation software database of the existing low-pressure vacuum carburizing equipment, there are no low-pressure vacuum carburizing process parameters for 10CrNi2Mo3Cu2V materials for reference. In the field of aviation transmission, the depth of carburizing is mostly 0.3-2.0mm. The process of controlled atmosphere carburizing furnace usually leads to relatively poor repeatability of the surface layer of the part. The same part, due to the influence of the environment and equipment stability, parts of different carburizing furnaces, the depth of the carburizing layer ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/22
CPCC23C8/22
Inventor 孙振淋郑医吕文生钱钰辛玉武
Owner HARBIN DONGAN ENGINE GRP
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