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Method for adding wear-resistant coating on M50NiL material bearing guidance surface

A guide surface and bearing technology, which is applied in the field of bearing structure design, can solve the problems of wear life and short service life of the guide surface, and achieve the effect of avoiding wear and improving the service life and reliability.

Inactive Publication Date: 2016-03-23
AVIC HARBIN BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of the guide surface wear and the short service life of the existing M50NiL material bearing at the initial stage of use, and provide a method for adding an anti-friction coating on the guide surface of the M50NiL material bearing

Method used

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  • Method for adding wear-resistant coating on M50NiL material bearing guidance surface
  • Method for adding wear-resistant coating on M50NiL material bearing guidance surface

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Effect test

specific Embodiment approach 1

[0012] Embodiment 1: A method of adding an anti-friction coating on the guide surface of the M50NiL material bearing in this embodiment is carried out according to the following steps:

[0013] 1. Before the final grinding raceway operation, use multi-arc ion plating equipment to prepare a TiN coating on the bearing guide surface by deposition. The method for preparing the TiN coating is: seal in the multi-arc ion plating equipment The furnace body is filled with N 2 and Ar gas, set the pressure in the furnace to 0.4Pa-0.6Pa, the furnace temperature to 280-300°C, use the Ti target as the anode, and the M50NiL material bearing to be processed as the cathode, electrify, and the electrified current is 60A-80A to obtain a TiN coating M50NiL material bearings with a thickness of 3 μm to 5 μm;

[0014] 2. Test the M50NiL material bearing with a TiN coating thickness of 3 μm to 5 μm obtained in step 1. When the Knoop hardness of the TiN coating on the guide surface of the M50NiL mat...

specific Embodiment approach 2

[0016] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the pressure in the furnace body in Step 1 is 0.5 Pa. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0017] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the furnace temperature in step 1 is 285-295°C. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention particularly relates to a method for adding wear-resistance coating on an M50NiL material bearing guidance surface, which belongs to the field of bearing structure design and aims at solving problems that the existing M50NiL material bearing generates guidance surface wearing and is short in service life at the use initial stage. The method comprises the following steps: (1), before a final roller grinding operation, utilizing a multi-arc ion plating apparatus, preparing a TiN coating on the bearing guidance surface in a deposition manner, filling N2 and Ar gas in a sealed furnace body, setting the internal gas pressure of the furnace body to be 0.4-0.6 Pa and the temperature of the furnace to be 280-300 DEG C, and electrifying the apparatus with the current of 60-80 A by taking a Ti target as an anode and a to-be-processed M50NiL material bearing as a cathode, thereby obtaining the M50NiL material bearing with the TiN coating with the thickness of 3-5 microns.

Description

technical field [0001] The invention belongs to the field of bearing structure design, and in particular relates to a method for adding an anti-friction coating on the guide surface of an M50NiL material bearing. Background technique [0002] At present, the service life of aero-engine main shaft bearings is getting higher and higher, and the materials such as GCr15 and 8Cr4Mo4V, which are maturely used in China, can no longer meet their service life requirements. Therefore, M50NiL (domestic brand G13Cr4Mo4Ni4V) with higher fatigue life is widely used. [0003] The current process of processing M50NiL material as the bearing guide surface is as follows: rough grinding plane - demagnetization - rough grinding guide surface - rough grinding inner diameter - rough grinding rib - rough grinding raceway - groove - Turning steps—turning inclined surfaces—drilling flange holes—removing acute angles on both sides of the holes—milling flanges—removing flange chamfers—drilling oblique...

Claims

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Application Information

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IPC IPC(8): F16C33/62F16C33/64F16C33/56
CPCF16C33/62F16C33/565F16C33/64
Inventor 刘森马芳冯小川闫国斌寇思源马新欣李振东杜翔刘明阳
Owner AVIC HARBIN BEARING
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