Preparing method of engineering machine final drive gear

A technology for transmission gears and construction machinery, applied in metal material coating process, ion implantation plating, coating and other directions, can solve the problem of mechanical matching PVD coating with high hardness, low coating performance, unsatisfactory coating performance, coating and substrate. Problems such as poor bonding force, to achieve the effect of improving physical and mechanical properties, reducing friction coefficient, and enhancing adhesion performance

Active Publication Date: 2020-09-22
JINING UNIV
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  • 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

Method used

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  • Preparing method of engineering machine final drive gear

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Experimental program
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Effect test

Embodiment 1

[0028] In the preparation method of engineering machinery final drive gear parts according to the present invention, the base material of the gear parts is 22CrNi2MoNb, and the base body of the gear parts is subjected to quenching, high temperature tempering, rough and fine machining, and then carburized by ion plating, and then ion plating The NbHfMoC gradient coating on the surface is deposited by a combined method with magnetron sputtering. Two C ion plating targets, one Nb magnetron sputtering target, one Hf magnetron sputtering target and one Mo magnetron sputtering target are used for deposition. target;

[0029] Specifically include the following steps:

[0030] (1) Parts processing: parts blank→quenching (830~880℃, water cooling)→high temperature tempering (520~550℃, water cooling)→rough machining→semi-finishing→stress relief tempering (500~550℃, air cooling) → Finishing (surface roughness Ra 1.6μm, processing size: lower limit of tolerance);

[0031] (2) Part surfac...

Embodiment 2

[0041] In the preparation method of engineering machinery final drive gear parts described in the present invention, the base material of the final drive gear parts is 20CrMnTi, and the gear part base is subjected to carburizing treatment by ion plating after quenching, high temperature tempering, and rough and fine machining, and then through The NbHfMoC gradient coating on the surface is deposited by the combined method of ion plating and magnetron sputtering. Two C ion plating targets, one Nb magnetron sputtering target, one Hf magnetron sputtering target and one Mo magnetron are used for deposition. sputtering target;

[0042] Specifically include the following steps:

[0043] (1) Parts processing: parts blank→quenching (910~950℃, oil quenching)→high temperature tempering (535~600℃, air cooling)→rough machining→semi-finishing→stress relief tempering (565~590℃, oil quenching) Cold)→finishing (surface roughness Ra 0.8μm, processing size: lower limit of tolerance);

[0044]...

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Abstract

The invention belongs to the technical field of engineering machine final drive gear manufacturing, and particularly relates to a preparing method of an engineering machine final drive gear. Through aphysical vapor deposition technology, surface carburizing and coating treatment are carried out, a carbide coating, a PVD method and a carburizing technology are combined, a carburizing diffusion layer is prepared between the carbide coating and a workpiece substrate through an ion sputtering method, that is, a workpiece surface is subjected to surface carburizing treatment through the ion sputtering method, an ion plating and magnetron sputtering composite method is adopted for depositing a NbHfMoC carbide coating with components changed in a gradient manner, the substrate material hardnesscan be improved, the attaching property of a substrate deposition coating and the substrate can be reinforced, the physical property difference between the deposition coating and the substrate material can be reduced, the anti-wear property of the engineering machine final drive gear part can be improved, the gear surface treatment efficiency is effectively improved, and the service life of the engineering machine final drive gear can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of manufacturing engineering machinery final drive gears, and in particular relates to a preparation method of engineering machinery final drive gears. Background technique [0002] As the main equipment of large-scale construction sites, construction machinery has extremely harsh operating conditions and drastic changes in the working load, which greatly reduces the service life of the traditional system of construction machinery. Therefore, the design and use requirements for the transmission system are very high. The final drive is the last stage of the construction machinery power transmission system. Its function is to decelerate the power transmitted by the engine, torque converter, and gearbox and then transmit it to the walking system to drive the construction machinery. Due to the reduction in speed, the reduction gear of the final drive system is subjected to a huge load and repeated cycle vibratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C23C14/02C23C14/32C23C14/35C23C14/06
CPCC21D1/18C23C14/022C23C14/32C23C14/352C23C14/0605C23C14/0635
Inventor 王首军宋文龙夏自祥张清阁
Owner JINING UNIV
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