Self-lubricating gear based on additive manufacturing and preparation method thereof

An additive manufacturing and self-lubricating technology, used in belts/chains/gears, mechanical equipment, components with teeth, etc., can solve the problems of gear life needs to be further improved, low preparation efficiency, etc., to achieve good self-lubricating effect, The effect of high preparation efficiency and strong bonding strength

Active Publication Date: 2021-03-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, surface treatment can improve the hardness and wear resistance of the gear surface, thereby improving the life of the gear; however, the preparation efficiency of the traditional method is low, and the life of the gear needs to be further improved

Method used

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  • Self-lubricating gear based on additive manufacturing and preparation method thereof

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preparation example Construction

[0025] The embodiment of the present invention also provides a method for preparing a self-lubricating gear based on additive manufacturing, including the following steps:

[0026] Pre-treatment: place the gear base 1 in alcohol and acetone solutions for ultrasonic cleaning for 10-20 minutes each, and perform degreasing treatment;

[0027] Step 12. Configure CBN-based mixed powder: CBN-based mixed powder according to mass percentage, including: Ni60A 20-30%, CBN30-40%, TiC 5-8%, graphene 3-6%, ZnO 3-6%, W2N 3-6%, VN 3-6%, Ag 3-6%, BNNTs 2-5%, and CNFs 2-5%;

[0028] Step 13, cladding CBN-based self-lubricating coating: put the prepared CBN-based mixed powder into the powder feeder, adjust the powder feeding rate of the powder feeder to 5-50g / s; use additive manufacturing technology to add CBN-based The mixed powder is clad on the surface of the gear substrate 1 to form a CBN-based self-lubricating coating with a thickness of 2-10mm;

[0029] Step 14, post-processing: Grindin...

Embodiment 1

[0033] The gear base made of 20Cr was placed in alcohol and acetone solutions for 10 minutes and ultrasonically cleaned for degreasing treatment. CBN-based mixed powder is configured, and the weight percentage of each component in the CBN-based mixed powder is: 20% Ni60A, 40% CBN, 10% TiC, 8% graphene, 4% ZnO, 4% W 2N, 4% VN, 4% Ag, 3% BNNTs and 3% CNFs. Put the prepared CBN-based mixed powder into the powder feeder, adjust the powder feeding rate of the powder feeder to 5g / s; use laser additive manufacturing technology to clad the mixed powder on the surface of the gear base to obtain a CBN-based self-lubricating coating The layer thickness was 2 mm. The surface of the CBN-based self-lubricating coating was ground-finished so that the total thickness of the coating was 1 mm. A self-lubricating gear based on additive manufacturing is obtained.

Embodiment 2

[0035] Put the gear substrate made of 20CrMnNi in the alcohol and acetone solutions for 20 minutes and ultrasonically clean it for degreasing treatment; configure the CBN-based mixed powder, and the weight percentage of each component in the CBN-based mixed powder is: 30% Ni60A, 30% CBN, 12% TiC, 6% graphene, 3% ZnO, 3% W 2 N, 3% VN, 3% Ag, 5% BNNTs and 5% CNFs. Put the prepared CBN-based mixed powder into the powder feeder, and adjust the powder feeding rate of the powder feeder to 50g / s; use the electron beam additive manufacturing technology to clad the mixed powder on the surface of the gear base to obtain a CBN-based self-lubricating The coating thickness is 10mm. The surface of the CBN-based self-lubricating coating was ground and finished so that the total thickness of the coating was 9 mm. A self-lubricating gear based on additive manufacturing is obtained.

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Abstract

The invention provides a self-lubricating gear based on additive manufacturing and a preparation method thereof. The self-lubricating gear has good toughness, the working surface has high hardness andwear resistance, and a good self-lubricating effect is achieved within the wide-temperature-range working range. The self-lubricating gear based on additive manufacturing comprises a gear substrate and a CBN-based self-lubricating coating, wherein the CBN-based self-lubricating coating is arranged on the surface of the gear substrate; the CBN-based self-lubricating coating is formed by CBN-basedmixed powder through an additive manufacturing technology; and the CBN-based mixed powder comprises graphene, ZnO, W2N, VN, Ag, BNNTs and CNFs. When the working temperature is relatively low, the graphene can play a lubricating role, and when the temperature is high, the W2N, the ZnO, the VN and the Ag can be subjected to in-situ reaction to generate ZnWO4, Ag2WO4 and V2O5 compounds with a lubricating effect, so that the gear has the good self-lubricating effect at the high temperature, the frictional wear is reduced, and the service life of the gear is prolonged.

Description

technical field [0001] The invention relates to the technical field of gear manufacturing, in particular to a self-lubricating gear based on additive manufacturing and a preparation method thereof. Background technique [0002] Gear transmission is an extremely common transmission mechanism used in the industry. However, during the gear transmission process, there is a large friction and wear between the tooth surfaces, which directly leads to a reduction in the life of the gear. Therefore, improving the lubricating performance of gears to reduce the friction and wear between tooth surfaces has become an effective way to prolong the life of gears. Friction and lubrication in the process of gear transmission has become an urgent problem to be solved in the gear industry. For this reason, a series of self-lubricating gears have been developed in recent years. At the same time, surface treatment can improve the hardness and wear resistance of the gear surface, thereby improvi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/17F16H55/06
CPCF16H55/17F16H55/06
Inventor 邢佑强骆诚刘磊吴泽
Owner SOUTHEAST UNIV
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