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Composite abrasion-resisting corrosion-resisting self-lubricating film and preparation method thereof

A self-lubricating, film-layer technology, applied in the direction of coating, solid-state diffusion coating, metal material coating process, etc., can solve the problems of poor corrosion resistance, low hardness of sulfurized layer, unsatisfactory lubrication performance, etc., to improve the resistance Grinding, improving wear-resistant lubrication performance, good anti-friction lubrication performance

Active Publication Date: 2013-11-20
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the hardness of the sulfurized layer is low and the corrosion resistance is poor
With the development of science and technology, the existing solid lubricant FeS or WS alone 2 The lubricating performance of the solid lubricating coating made by such materials can no longer meet the requirements of some special working conditions.

Method used

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  • Composite abrasion-resisting corrosion-resisting self-lubricating film and preparation method thereof
  • Composite abrasion-resisting corrosion-resisting self-lubricating film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] First, the 35CrMoA steel plate is subjected to quenching and tempering treatment. The specific process parameters of quenching and tempering treatment are: 850°C×20min oil quenching, 550°C×20min high temperature tempering, water cooling to obtain tempered sorbite structure, surface hardness is HRC30; surface finish Grinding and polishing, the roughness is 0.8μm.

[0047] Then clean the surface with acetone, and spray the self-made light-absorbing paint on the surface of the workpiece with a Japanese Iwata W-77 spray gun. The thickness of the light-absorbing paint sprayed layer is about 0.05mm. The workpiece is subjected to laser phase transformation hardening treatment. The specific steps and process parameters are: using 5kW cross-flow CO 2 Laser processing system, rectangular spot 10mm×1mm, power 2kW, scanning on the workpiece surface at a speed of 2000mm / min. During the scanning process, the high-energy laser beam irradiates the surface of the workpiece, and the li...

Embodiment 2

[0055] First, the trusses on the inner wall of the quenched and tempered 45# steel oil pump barrel were rubbed to a roughness of 0.8 μm. Clean the surface with acetone, and spray the self-made light-absorbing paint evenly on the inner wall of the pump barrel with a self-made slender tube inner wall light-absorbing paint spraying device. The thickness of the light-absorbing paint sprayed layer is about 0.05mm.

[0056]Laser phase transformation hardening treatment is carried out on the inner wall of the pump barrel (oil pipe) of the oil well pump by using the laser inner hole wall processing device. The specific steps and process parameters are: use a high-power laser processing system inner hole wall processing device, circular spot φ3mm, power 1000W, scan the inner wall of the pump cylinder with a spiral trajectory at a speed of 3500mm / min. During the scanning process, the high-energy laser beam irradiates the inner wall of the pump cylinder, and the light energy absorbed by ...

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Abstract

The invention relates to a composite abrasion-resisting corrosion-resisting self-lubricating film and a preparation method thereof. Laser transformation hardening is conducted on a steel material surface, and low temperature ion nitriding and ion sulphuration processing is conducted on a transformation hardening layer to obtain the composite abrasion-resisting corrosion-resisting self-lubricating film. The laser transformation hardening low temperature ion nitriding and sulphuration composite abrasion-resisting corrosion-resisting self-lubricating film can further improve abrasion-resisting lubricating performance of the steel material surface, and a structural diagram is shown as graph 1. The composite abrasion-resisting corrosion-resisting self-lubricating film is novel in structure, has no obvious boundary between the laser transformation hardening layer and the nitriding / sulphuration layer, and is good in combination with the base body. Due to the fact that the laser transformation hardening processing can reach conditions of self-quenching, grains are refined, more interfaces are formed, diffusion channels of [N] and [S] are increased, and formation of the nitriding / sulphuration layer is promoted. The thickness of the laser transformation hardening layer ranges from 0.3 to 0.7 mm, the thickness of the nitriding layer ranges from 0.1 to 0.4 mm, and the thickness of the sulphuration layer ranges from 0.001 to 0.01 mm. Through friction abrasion tests, friction coefficient, polishing scratch depth and the like of a composite modified layer are small, and good abrasion-resisting, anti-friction and lubrication effects are achieved.

Description

technical field [0001] The invention belongs to the surface modification layer of friction pairs of petroleum machinery, transportation machinery and various engineering operation machinery. The invention relates to a composite wear-resistant and corrosion-resistant self-lubricating film layer and a preparation method thereof, in particular to a laser phase transformation hardening-low temperature ion nitriding and sulfurizing composite self-lubricating film layer and a preparation method thereof. The invention obtains a laser phase transformation hardening-low temperature ion nitriding and sulfurizing composite self-lubricating film layer, which can further improve the wear-resistant and lubricating performance of the surface of the steel material, can greatly reduce the friction coefficient of the friction pair, and increase its service life. Background technique [0002] In modern production and life, many mechanical parts rely on friction pairs to achieve energy transmis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F17/00C21D1/09C23C8/36
Inventor 韩彬王勇赵卫民韩涛孙建波王楠楠
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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