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Heat treatment method for 2Cr3WMoV material gear forging

A heat treatment method and heat treatment furnace technology, which are applied in metal material coating process, coating, solid diffusion coating and other directions, can solve problems such as unqualified, and achieve high hardness, high wear resistance, and good heat resistance.

Active Publication Date: 2017-05-31
XIAN AERO ENGINE CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem in the existing carburizing process is: if the gear is carburized with 2Cr3WMoV material, the grade of carbide is 7, which is unqualified

Method used

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  • Heat treatment method for 2Cr3WMoV material gear forging
  • Heat treatment method for 2Cr3WMoV material gear forging
  • Heat treatment method for 2Cr3WMoV material gear forging

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Embodiment Construction

[0022] A heat treatment method for a 2Cr3WMoV material gear forging is provided:

[0023] Step 1. Preprocessing

[0024] Process the bar of 2Cr3WMoV material into gear forgings, put the gear forgings into the heat treatment furnace to heat after cooling, and then normalize; after normalizing, quench and temper the gear forgings; and adopt lower temperature and lower carbon potential to enter the furnace , reduce internal stress and prevent cracks.

[0025] Step two, two-stage carburizing

[0026] Put the gear forging into a carburizing furnace, and carry out two-stage carburizing on the gear forging continuously, wherein the carbide grade in the two-stage carburizing is controlled to be ≤6 grade, and the depth of the carburized layer after the two-stage carburizing is 1.25-1.4 mm;

[0027] In the first stage of carburizing, the carbon potential is 1.1-1.3, the heating temperature is 925±5°C, the heat preservation is 3.5-4.5 hours, and the high carbon concentration gradient ...

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Abstract

The present invention belongs to the chemical heat treatment in the heat treatment technology category, and relates to a heat treatment method for a 2Cr3WMoV material gear forging. A purpose of the present invention is to make a 2Cr3WMoV material gear achieve excellent performances of high hardness and high wear resistance by using a scientific and reasonable carburizing and quenching process so as to meet the long-term use requirement. According to the present invention, after a 2Cr3WMoV material is subjected to carburizing, the excellent performances of deep infiltration layer, high hardness, high wear resistance, good heat resistance and the like are provided while the defects that the surface layer carbide is easy to accumulate, the carbide level is high, the crack and the block shedding are easily generated, and the like exist, and after 12CrNi3A and other ordinary low-carbon alloy steel are subjected to carburizing, the defects do not exist while the hardness, the wear resistance, the heat resistance and the like are low so as not to meet the use needs of the advanced combat aircraft; and by using the scientific and reasonable carburizing and quenching process, the 2Cr3WMoV material gear has excellent performances of high hardness, high wear resistance, good heat resistance and the like so as to meet the long-term use requirement.

Description

technical field [0001] The invention belongs to chemical heat treatment in the category of heat treatment technology, and relates to a heat treatment method for gear forgings made of 2Cr3WMoV material. Background technique [0002] The recent state of the art of the same kind is that carburizing generally uses low-carbon alloy steel such as No. 20 steel, 12CrNi3A, 16Cr2MnTiA, 20CrMnTI, 18Cr2Ni4WA, etc., and the depth of the carburized layer is required to be ≤ 1.2mm. 42. The gear properties of the two materials are compared. The 2Cr3WMoV material gear adopts scientific and reasonable carburizing and quenching processes, which can achieve high hardness, high wear resistance, and good heat resistance. Require. [0003] The technical problem in the existing carburizing process is: if the gear is carburized with 2Cr3WMoV material, the grade of carbide is 7, which is unqualified. 2Cr3WMoV is the grade in GJB / 2294-95. Contents of the invention [0004] The problem solved by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/22C23C8/80C23C8/02
CPCC23C8/02C23C8/22C23C8/80
Inventor 王明贵任可真侯晓鹏任长安马小昭
Owner XIAN AERO ENGINE CONTROLS
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