Iron-chromium-boron-silicon/FeS composite solid lubrication thin film and method for making same

A solid lubrication, borosilicate technology, applied in engine lubrication, mechanical equipment, coatings, etc., can solve problems such as poor performance, unsatisfactory metal matrix binding ability, and difficult to master.

Active Publication Date: 2009-04-01
ACADEMY OF ARMORED FORCES ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the surface energy of FeS particles is low, and the wettability with the substrate is poor, so the bonding strength between the coating and the substrate is low.
When the FeS content is too low or too high, the performance is poor, and the appropriate FeS content is difficult to grasp
[0005] Also have prior art to prepare FeS film is to directly carry out low-temperature sulfurizing treatment on the surface such as 45# steel, the nano-mechanical property of made FeS film comprises nano-hardness and modulus of elasticity all low, causes the wear resistance ...

Method used

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  • Iron-chromium-boron-silicon/FeS composite solid lubrication thin film and method for making same
  • Iron-chromium-boron-silicon/FeS composite solid lubrication thin film and method for making same
  • Iron-chromium-boron-silicon/FeS composite solid lubrication thin film and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Firstly, the 45# steel is quenched, the hardness is HRC55, and the surface roughness is 0.8μm; Sand distance 130mm. Then clean the sandblasting surface with an appropriate amount of acetone with a purity of 99.5%; then supersonic plasma spray the iron-chromium-borosilicate coating on the surface of the substrate, and the thickness of the sprayed iron-chromium-borosilicate coating is about 300-400 μm. The specific process parameters are shown in Table 1;

[0055] Table 1

[0056] Spraying voltage / V Spraying current / A Spraying power / kW Spray distance / mm Spraying time / S 130 350 40 90 60S

[0057] The 45# steel coated with iron chromium borosilicate coating is subjected to low temperature ion sulfurization treatment, the specific steps and process parameters are: the reaction gas of ion sulfurization is solid sulfur vapor, and the 45# steel coated with iron chromium borosilicate coating Connect the cathode, and connect the anode to the furna...

Embodiment 2

[0073] Firstly, the 45# steel is quenched, the hardness is HRC55, and the surface roughness is 0.8μm; Sand distance 150mm.

[0074] Then wash with acetone; then supersonic plasma spraying iron chromium borosilicate coating on the surface of the substrate; the thickness of the sprayed iron chromium borosilicate coating is about 300-400 μm. Process parameters are shown in Table 2;

[0075] Table 2

[0076] Spraying voltage / V Spraying current / A Spraying power / kW Spray distance / mm Spraying time / S 140 360 40 100 60S

[0077] The 45# steel coated with iron chromium borosilicate coating is subjected to low temperature ion sulfurization treatment, the specific steps and process parameters are: the reaction gas of ion sulfurization is solid sulfur vapor, and the 45# steel coated with iron chromium borosilicate coating Connect the cathode, and connect the anode to the furnace wall. When the vacuum reaches 10Pa, feed ammonia gas into the furnace, fill it...

Embodiment 3

[0093] Firstly, the 45# steel is quenched, the hardness is HRC55, and the surface roughness is 0.8μm; Sand distance 160mm. Then wash with acetone; then supersonic plasma spraying iron chromium borosilicate coating on the surface of the substrate; the thickness of the sprayed iron chromium borosilicate coating is about 300-400 μm. Process parameters are shown in Table 3;

[0094] table 3

[0095] Spraying voltage / V Spraying current / A Spraying power / kW Spray distance / mm Spraying time / S 150 370 40 110 60S

[0096] The 45# steel coated with iron chromium borosilicate coating is subjected to low temperature ion sulfurization treatment, the specific steps and process parameters are: the reaction gas of ion sulfurization is solid sulfur vapor, and the 45# steel coated with iron chromium borosilicate coating Connect the cathode, and connect the anode to the furnace wall. When the vacuum reaches 10Pa, feed ammonia gas into the furnace, fill it up to 60...

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Abstract

The invention discloses an Fe-Cr-B-Si/FeS composite solid lubricating film and a preparation method thereof, which firstly uses ultrasonic plasma for spray painting an Fe-Cr-B-Si coating on a substrate and then low temperature ion sulfurizing treatment is carried out to the Fe-Cr-B-Si coating and the Fe-Cr-B-Si/FeS composite solid lubricating film is prepared. The Fe-Cr-B-Si/FeS composite solid lubricating film is characterized in that: the Fe-Cr-B-Si coating is firstly painted and then the sulfurizing treatment is carried out to the coating so that the surface layer of the coating reacts with sulfurous steam to form an FeS layer, and finally, the upper part of the Fe-Cr-B-Si coating turns out to be an FeS solid lubricating layer. The invention has a novel structure and no obvious boundary exists on the FeS layer of the Fe-Cr-B-Si coating and the FeS layer has good binding capacity with the substrate. Compared with the prior art, the invention has good nano mechanical properties with an anti-friction capacity better than the prior art by more than 20 times. As the invention is the FeS layer obtained from sulfurizing on the surface of the Fe-Cr-B-Si coating, thus having a compact structure; besides, the friction property of the Fe-Cr-B-Si/FeS composite solid lubricating film is stable and the anti-friction property thereof is much better under the conditions of either dry friction or oiling.

Description

technical field [0001] The invention relates to a solid lubricating film, in particular to an iron chromium borosilicate / FeS composite solid lubricating film and a preparation method thereof. Background technique [0002] At present, in order to reduce the friction coefficient of the surface of the workpiece, enhance the anti-friction and anti-seizure ability, and make it have excellent anti-friction and anti-friction performance, those skilled in the art generally carry out vulcanization treatment on the metal surface, that is, vulcanization, to form a vulcanization on the surface. sulfur layer. However, sulfurizing directly on the metal surface will reduce the hardness and elastic modulus of the metal, and the anti-friction effect is not good. In order to increase the wear resistance of the material and prolong the service life of the friction pair, it is very necessary to increase the hardness and strength of the material, but this is not always effective in many occasio...

Claims

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Application Information

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IPC IPC(8): F16N15/00C23C4/04C23C4/134C23C4/18
Inventor 王海斗徐滨士康嘉杰朱丽娜李国禄刘家浚
Owner ACADEMY OF ARMORED FORCES ENG PLA
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