A preparation process of anti-friction and wear-resistant gear parts

A technology for preparation process and parts, which is applied in the field of preparation process of anti-friction and wear-resistant gear parts, can solve the problems of mechanically matching PVD coating with high hardness and low hardness, unsatisfactory performance of coating, and inability to obtain PVD coating, etc., to achieve improvement Effects of surface treatment efficiency, good support matrix, and mitigation of differences in physical properties

Active Publication Date: 2022-05-24
JINING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the PVD carbide coating is directly prepared on the surface of the gear parts, due to the large difference between the substrate hardness, elastic modulus, thermal expansion coefficient and the coating material, it is impossible to obtain a PVD coating with high bonding force, making the PVD coating Premature shedding and failure
Chinese patent CN101058870A adopts a single PVD coating on the surface of the mold. The poor bonding force between the coating and the substrate and the poor mechanical matching between the PVD coating and the substrate are important factors that limit the advantages of PVD coatings such as high hardness and low friction coefficient.
Chinese patent CN103727180A directly prepares wear-resistant ceramic coatings and diamond coatings on the surface of carbon steel. Due to the soft hardness of the substrate, which cannot support the coating and the obvious performance difference between the substrate and the coating, the performance of the prepared coating cannot meet the requirements. Many practical requirements, especially under the conditions of high speed, heavy load and alternating load, the coating will fall off and wear quickly

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  • A preparation process of anti-friction and wear-resistant gear parts

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Embodiment 1

[0029] In the preparation method of wear-resistant gear parts of the present invention, the base material of the gear parts is 22CrNi2MoNbH; The VCrWSiC / Cr multi-layer composite coating on the surface was deposited by the controlled sputtering composite method. During the deposition, 2 C ion plating targets, 1 V magnetron sputtering target, 1 Cr magnetron sputtering target, and 1 W magnetron sputtering target were used. Sputtering target and 1 Si magnetron sputtering target;

[0030] Specifically include the following steps:

[0031](1) Parts processing: parts base blank → quenching (835 ~ 885 ° C, water cooling) → high temperature tempering (525 ~ 565 ° C, water cooling) → roughing → semi-finishing → stress relief tempering (505 ~ 565 ° C, air cooling) )→finishing (surface roughness Ra1.6μm, processing size: lower tolerance limit);

[0032] (2) Parts surface pretreatment: use metal cleaning agent to remove oil stains on the surface of the workpiece, rinse and dry;

[0033]...

Embodiment 2

[0044] In the preparation method of wear-resistant gear parts according to the present invention, the base material of the gear parts is 20MnB, the base of the gear parts is subjected to quenching, high temperature tempering, rough finishing and then carburizing by ion plating, and then ion plating and magnetic The VCrWSiC / Cr multi-layer composite coating on the surface was deposited by the controlled sputtering composite method. During the deposition, 2 C ion plating targets, 1 V magnetron sputtering target, 1 Cr magnetron sputtering target, and 1 W magnetron sputtering target were used. Sputtering target and 1 Si magnetron sputtering target;

[0045] Specifically include the following steps:

[0046] (1) Parts processing: parts base blank → quenching (900 ~ 945 ° C, oil quenching) → high temperature tempering (525 ~ 600 ° C, air cooling) → rough machining → semi-finishing → stress relief tempering (555 ~ 595 ° C, Oil cooling)→finishing (surface roughness Ra1.6μm, processing...

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Abstract

The invention belongs to the technical field of gear manufacturing, and in particular relates to a preparation process of anti-friction and wear-resistant gear parts, a method for preparing a high-pressure anti-friction and wear-resistant hydraulic pump by performing surface carburization and coating treatment through physical vapor deposition technology, and the carbide Combining the coating, PVD method and carburizing technology, a carburizing diffusion layer is prepared between the carbide coating and the workpiece substrate by ion sputtering, that is, the surface of the workpiece is first carburized by ion sputtering. , and then use ion plating and magnetron sputtering composite method to deposit VCrWSiC / Cr carbide coating with gradient composition to slow down the difference in physical properties between the coating and the substrate material, improve the hardness of the substrate material, and enhance the coating and substrate. Adhesion performance, thereby improving the comprehensive performance of gear parts such as anti-friction and wear resistance, effectively improving the surface treatment efficiency and the service life of the workpiece.

Description

technical field [0001] The invention belongs to the technical field of gear manufacturing, and in particular relates to a preparation process of a friction-reducing and wear-resistant gear part. Background technique [0002] Gear transmission is the most important form of mechanical transmission. It has the advantages of high transmission efficiency, stable transmission ratio, high reliability and long life. It is widely used and is an important basic part of the machinery industry. With the continuous improvement of the modern industrial level, the requirements for gear transmission are becoming more and more demanding. For example, in the fields of aviation, aerospace and submersible, the gears are required to have the characteristics of large transmission ratio, high efficiency, light weight and long maintenance period. . In order to improve the bearing capacity of the gear, the method of reducing the stress per unit area of ​​the gear and increasing the strength per uni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/35C23C8/38C23C14/16C23C14/06C21D9/32
CPCC21D1/18C21D9/32C23C8/38C23C14/352C23C14/165C23C14/0635C23C28/322C23C28/341C21D2261/00
Inventor 宋文龙张清阁张荣华李小冬
Owner JINING UNIV
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