Unlock instant, AI-driven research and patent intelligence for your innovation.

A Method of Improving the Wear Resistance of High Pressure Hydraulic Pump Parts

A technology of hydraulic pump and wear resistance, which is applied in the field of hydraulic pump manufacturing, can solve the problems of high mechanical matching PVD coating, low hardness, unsatisfactory coating performance, and inability to obtain PVD coating, etc., to improve surface treatment efficiency, The effect of slowing down the difference in physical properties and hindering the propagation of cracks and defects

Active Publication Date: 2022-06-21
JINING UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the PVD carbide coating is prepared directly on the surface of the hydraulic pump 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 PVD coating Premature shedding and failure of layers
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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Method of Improving the Wear Resistance of High Pressure Hydraulic Pump Parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In the method for improving the wear resistance of high-pressure hydraulic pump parts according to the present invention, the base material of the hydraulic pump parts is 32Cr2MoV; The HfMoZrTiC / Mo multilayer composite coating on the surface was deposited by the composite method of ion plating and magnetron sputtering. During the deposition, 2 C ion plating targets, 1 Hf magnetron sputtering target, and 1 Mo magnetron sputtering target were used. 1 Zr magnetron sputtering target and 1 Ti magnetron sputtering target;

[0030] Specifically include the following steps:

[0031] (1) Parts processing: parts base blank → quenching (845~890℃, water cooling)→high temperature tempering (520~580℃, water cooling)→roughing→semi-finishing→stress relief tempering (520~560℃, 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 workpiec...

Embodiment 2

[0044] In the method for improving the wear resistance of high-pressure hydraulic pump parts according to the present invention, the base material of the hydraulic pump parts is 20CrMnTi. The HfMoZrTiC / Mo multilayer composite coating on the surface was deposited by the composite method of ion plating and magnetron sputtering. During the deposition, 2 C ion plating targets, 1 Hf magnetron sputtering target, and 1 Mo magnetron sputtering target were used. 1 Zr magnetron sputtering target and 1 Ti magnetron sputtering target;

[0045] Specifically include the following steps:

[0046] (1) Parts processing: Part 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 size: lower tolerance limit);

[0047] (2) Parts surface pretreatment: use metal cleaning agent to remove oil stains on th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
surface roughnessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of hydraulic pump manufacturing, and in particular relates to a method for improving the wear resistance of parts of a high-pressure hydraulic pump. Surface carburizing and coating treatment by physical vapor deposition technology to prepare wear-resistant high-pressure hydraulic pumps, combining the advantages of carbide coating, PVD method, carburizing technology and multi-layer composite structure, in the carbide coating A carburized diffusion layer is prepared by ion sputtering between the workpiece and the substrate, that is, the surface of the part is first carburized by ion sputtering, and then HfMoZrTiC / Mo is deposited by ion plating and magnetron sputtering. Multi-layer composite coating to slow down the difference in physical properties between the coating and the base material, increase the hardness of the base material, and enhance the adhesion between the coating and the base, thereby improving the comprehensive performance of the hydraulic pump parts such as wear resistance, and effectively improving the surface treatment. efficiency and service life of the workpiece.

Description

technical field [0001] The invention belongs to the technical field of hydraulic pump manufacturing, and particularly relates to a method for improving the wear resistance of parts of a high-pressure hydraulic pump. Background technique [0002] The hydraulic pump is the power component of the hydraulic transmission system, its function is to convert the mechanical energy of the power machine (such as the motor and the internal combustion engine, etc.) into the hydraulic energy of the oil, and provide power for the entire hydraulic system. With the rapid development of industrial technology, hydraulic pumps are gradually developing in the direction of high pressure, high speed and large flow. Because the hydraulic pump is subjected to high and concentrated alternating loads at the same time of high-speed operation, the wear of parts in the pump is the main damage form of domestic hydraulic pumps, especially high-pressure hydraulic pumps. Therefore, improving the performance ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/32C23C14/06C23C14/02C23C14/18C23C14/35
CPCC23C14/32C23C14/0605C23C14/022C23C14/185C23C14/35C23C14/352C23C14/0635C23C14/0036
Inventor 夏自祥宋文龙张璇王首军
Owner JINING UNIV