CN110643928A - Iron-based alloy wear-resistant antifriction coating and preparation method thereof - Google Patents

Iron-based alloy wear-resistant antifriction coating and preparation method thereof Download PDF

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CN110643928A
CN110643928A CN201911059046.XA CN201911059046A CN110643928A CN 110643928 A CN110643928 A CN 110643928A CN 201911059046 A CN201911059046 A CN 201911059046A CN 110643928 A CN110643928 A CN 110643928A
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iron
coating
based alloy
wear
resistant
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CN110643928B (en
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高培虎
陈白阳
曾圣聪
杨忠
郭永春
李建平
梁民宪
郭巧琴
白亚平
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Xian Technological University
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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134Plasma spraying
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C37/00Cast-iron alloys
    • C22C37/10Cast-iron alloys containing aluminium or silicon
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06Metallic material
    • C23C4/067Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18After-treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0824Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid

Abstract

The invention discloses an iron-based alloy wear-resistant antifriction coating and a preparation method thereof, wherein the preparation method comprises the following steps: pretreating the iron-based alloy; using Fe, Al, Si and C as raw materials, and performing gas atomization method powder making under the protection of methane; spraying FeAlSiC alloy powder on the surface of the iron-based alloy by adopting a plasma spraying method to form a coating; carrying out heat treatment on the coating under the protection of methane atmosphere; in the steps of powder making and heat treatment, methane is used as protective gas, so that alloy powder can be prevented from decarbonizing, and the gas can be recycled; the FeAlSiC coating is sprayed on the iron-based workpiece by using the iron-based alloy powder with the designed components through a plasma spraying technology on the basis of preparing the alloy powder by methane protection centrifugal gas atomization, the friction coefficient of the coating and the GCr15 pin to the pin after heat treatment is less than 0.3, the microhardness of the coating can reach 530HV, the wear loss of the coating is less than 2mg, the wear-resistant and antifriction effect of the coating with separated graphite is good, and the cost is low.

Description

Iron-based alloy wear-resistant antifriction coating and preparation method thereof
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of metal surface modification, and particularly relates to an iron-based alloy wear-resistant antifriction coating and a preparation method thereof.
[ background of the invention ]
The abrasion is one of three main reasons (abrasion, corrosion and fatigue) of metal part failure, and because the abrasion resistance of the material is poor and the material is in abrasion working condition operation, the service life of a large number of basic parts in China is generally lower than the international product level, so the economic loss caused by the abrasion is also very striking. The cheap and efficient wear-resistant antifriction coating prepared by the surface modification technology can prolong the service life of the workpiece and further improve the economic benefit.
At present, the metal ceramic composite coating is prepared by uniformly distributing granular ceramic phases on a metal substrate with good plasticity to obtain the coating with metal toughness and ceramic high temperature resistance and wear resistance. For example, the WC-Co thermal spray coating shows excellent wear resistance, but the hardness of WC particles is high, the wear-resistant layer can generate plastic deformation and spalling failure under the condition of no-lubrication service, and the abrasion of a workpiece can be aggravated by the falling of the WC particles with high hardness. In the high-temperature spraying process, the phenomenon that WC is decarburized and dissolved into Co base metal can occur, so that the wear resistance of the coating is reduced sharply, and the coating material is expensive, so that the wide-range application of the coating is limited.
[ summary of the invention ]
The invention aims to provide an iron-based alloy wear-resistant antifriction coating and a preparation method thereof, and aims to solve the problems that a large number of industrial basic parts, particularly iron-based parts, are easy to peel and deform, are quickly worn, are high in cost and are poor in wear resistance.
The invention adopts the following technical scheme: a preparation method of an iron-based alloy wear-resistant antifriction coating comprises the following steps:
pretreating the iron-based alloy;
using Fe, Al, Si and C as raw materials, and performing gas atomization method powder making under the protection of methane;
spraying FeAlSiC alloy powder on the surface of the iron-based alloy by adopting a plasma spraying method to form a coating;
and carrying out heat treatment on the coating under the protection of a methane atmosphere.
Further, the FeAlSiC alloy powder comprises the following components in percentage by weight: 3.7 to 4.0 percent of Al, 3.5 to 3.7 percent of Si, 5.5 to 6 percent of C and the balance of Fe.
Further, the pretreatment method in the step one comprises the following steps: degreasing and derusting, cleaning with acetone, drying, and cleaning with SiO2And carrying out sand blasting treatment.
Further, in the plasma spraying in the third step, the main gas is argon, the auxiliary gas is hydrogen, the parameters of the plasma spraying method are 54.5V of voltage, 550A of current, 80mm of spraying distance, 0.9MPa of argon pressure, 47L/min of flow, 0.36MPa of hydrogen pressure, 1.5L/min of flow and 400 mu m of coating thickness of 300-.
Further, in the fourth step, a tubular atmosphere protection furnace protected by methane atmosphere is adopted for heat treatment, the heat treatment temperature is 700-760 ℃, and the heat preservation time is 30-60 min.
An iron-based alloy with wear-resistant and friction-reducing coating, comprising:
an iron-based alloy, which is composed of,
a FeAlSiC coating which is coated on the surface of the iron-based alloy and is used for increasing the wear resistance and the friction reduction of the iron-based alloy,
wherein the FeAlSiC alloy powder comprises the following components in percentage by weight: 3.7 to 4.0 percent of Al, 3.5 to 3.7 percent of Si, 5.5 to 6 percent of C and the balance of Fe.
An iron-based part having an iron-based alloy wear-resistant and friction-reducing coating, comprising:
an iron-based part having a base material,
and the FeAlSiC coating is coated on the surface of the iron-based alloy and is used for increasing the wear resistance and the friction reduction of the iron-based part.
The application of the iron-based part with the FeAlSiC coating is to manufacture a high-temperature moving part of a high-horsepower engine.
The invention has the beneficial effects that: in the steps of powder making and heat treatment, methane is used as protective gas, so that alloy powder can be prevented from decarbonizing, and the gas can be recycled; the FeAlSiC coating is sprayed on the iron-based workpiece by using the iron-based alloy powder with designed components through a plasma spraying technology on the basis of preparing the alloy powder by methane protection centrifugal gas atomization, the friction coefficient of the coating and the GCr15 pin to the wear after heat treatment is less than 0.3, the microhardness of the coating can reach 530HV, the wear loss of the coating is less than 2mg, the coating with separated graphite has good wear-resistant and antifriction effects, the cost is low, and the coating is suitable for repairing and surface protection of industrial iron-based parts.
[ description of the drawings ]
FIG. 1 is an SEM image of an untreated section of a spray coating of example 1 of the present invention;
FIG. 2 is an SEM image of a cross-section of a coating layer after heat treatment in example 1 of the present invention.
[ detailed description ] embodiments
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a preparation method of an iron-based alloy wear-resistant antifriction coating, which comprises the following steps:
step 1: the iron-based alloy is pretreated, and the pretreatment method comprises the following steps: degreasing and derusting, cleaning with acetone, drying, and cleaning with SiO2And carrying out sand blasting treatment.
Step 2: using Fe, Al, Si and C as raw materials, and performing gas atomization method powder making under the protection of methane; the FeAlSiC alloy powder comprises the following components in percentage by weight: 3.7 to 4.0 percent of Al, 3.5 to 3.7 percent of Si, 5.5 to 6 percent of C and the balance of Fe; methane is used as protective gas, so that alloy powder can be prevented from being decarburized, and the gas can be recycled; the FeAlSiC coating is sprayed on the iron-based workpiece by a plasma spraying technology on the basis of preparing the alloy powder by methane protection centrifugal gas atomization by utilizing the iron-based alloy powder with the designed components.
And step 3: spraying FeAlSiC alloy powder on the surface of the iron-based alloy by adopting a plasma spraying method to form a coating; the parameters of the plasma spraying method are voltage 54.5V, current 550A, spraying distance 80mm, argon pressure 0.9MPa, flow 47L/min, hydrogen pressure 0.36MPa, flow 1.5L/min, and coating thickness of 400 μm, which are equivalent to that of the conventional coating. In plasma spraying, argon is used as main gas and hydrogen is used as auxiliary gas.
And 4, step 4: and carrying out heat treatment on the coating, wherein the heat treatment adopts a tubular atmosphere protection furnace protected by methane atmosphere, the heat treatment temperature is 700-760 ℃, the heating rate is 5 ℃/min, and the heat preservation time is 30-60 min. After heat treatment, graphite is separated out from the coating, and the coating has the characteristics of wear resistance and antifriction under the high hardness of the coating and the solid lubrication action of the separated graphite. When selecting protective gas in the powder making process among the prior art, generally select argon gas or vacuum protection, but if select argon gas or vacuum protection when, just need rapid heating up, after rapid heating up, just can't separate out graphite carbon, can produce free carbon, and then can not reach the effect of antifriction.
The FeAlSiC coating prepared by the plasma spraying method has the main advantages of high wear resistance and friction reduction, and the carbon atoms in the alloy coating cannot be separated out in time due to the high carbon content in the alloy powder and the extremely high supercooling degree in the plasma spraying cooling process to form a supersaturated solid solution of carbon. After heat treatment, the spherule graphite is separated out, and graphite is separated out in the particles and at the interface to form a solid lubricating phase. Spherical graphite is formed in the coating particles and at the interface, and the graphite serving as a solid lubricant plays a good antifriction role in the service process of parts.
The coating material mainly contains Fe, Al, Si and C, is low in price, is a wear-resistant antifriction material with development potential and low cost, and has important significance in prolonging the service life of parts of industrial equipment. The FeAlSiC coating has good wear-resistant and antifriction effects and cheap and wide raw materials, and has important significance for prolonging the service life and improving the working efficiency of a large number of workpieces, especially iron-based parts in industrial equipment. The invention solves the problems of easy spalling, easy deformation, quick abrasion, high cost and poor abrasion resistance of a large number of industrial basic iron-based parts.
The invention also discloses an iron-based alloy with a wear-resistant antifriction coating, which comprises the following components: the FeAlSiC coating is coated on the surface of the iron-based alloy and is used for increasing the wear resistance and the friction reduction of the iron-based alloy, wherein the FeAlSiC alloy powder comprises the following components in percentage by weight: 3.7 to 4.0 percent of Al, 3.5 to 3.7 percent of Si, 5.5 to 6 percent of C and the balance of Fe.
The invention also discloses an iron-based part with the iron-based alloy wear-resistant antifriction coating, which comprises the following components: the FeAlSiC coating is coated on the surface of the iron-based part and used for increasing the wear resistance and the friction reduction of the iron-based part, wherein the FeAlSiC alloy powder comprises the following components in percentage by weight: 3.7 to 4.0 percent of Al, 3.5 to 3.7 percent of Si, 5.5 to 6 percent of C and the balance of Fe.
The invention also discloses application of the iron-based part with the iron-based alloy wear-resistant and antifriction coating, and the iron-based part with the FeAlSiC coating is used for manufacturing high-temperature moving parts of a high-horsepower engine, such as parts of a cylinder body, a cylinder cover, a crankshaft, a connecting rod, a camshaft and the like.
Example 1:
the content of FeAlSiC alloy elements is respectively Al: 3.7% Si: 3.5%, C: 5.5%, Fe: 87.3 percent, and the particle size of the alloy powder is 40-50 mu m.
Step 1: pretreating a G20 steel substrate; will be provided withThe iron-based sample is degreased and derusted, then is cleaned and dried by acetone after being dried, and is cleaned and dried by SiO2And carrying out sand blasting treatment to remove an oxide layer and impurities on the surface.
Step 2: vacuum melting, and performing powder preparation by centrifugal gas atomization method, wherein the rotating speed of a centrifuge is 12000rad/min, methane gas is used for gas atomization, and methane is used as protective gas.
And step 3: the FeAlSiC alloy coating is prepared on the G20 steel base material by a plasma spraying method, and the parameters of the plasma spraying process method are as follows: voltage 54.5V, current 550A, spraying distance 80mm, argon pressure 0.9MPa, flow 47L/min, hydrogen pressure 0.36MPa, flow 1.5L/min, and coating thickness 400 μm.
And 4, step 4: carrying out heat treatment on the alloy coating under the protection of methane atmosphere; the heat treatment temperature is 700 ℃, the heating rate is 5 ℃/min, the heat preservation time is 30min, and the furnace cooling is carried out.
As shown in FIGS. 1 and 2, the microhardness test of the heat-treated sample showed that the average coating hardness was 530HV, the graphite volume fraction was 8.9% on average, the friction-wear test showed that the coating had a coefficient of friction of 0.28 and a wear loss of 1.9 mg.
Example 2:
the content of FeAlSiC alloy elements is respectively Al: 3.8% Si: 3.6%, C: 5.6%, Fe: 87.0 percent; the particle size of the alloy powder is 40-50 μm.
Step 1: pretreating a 1Cr8Ni9Ti stainless steel substrate; will be provided with
Figure BDA0002257360320000061
The iron-based sample is degreased and derusted, then is cleaned and dried by acetone after being dried, and is cleaned and dried by SiO2And carrying out sand blasting treatment to remove an oxide layer and impurities on the surface.
Step 2: vacuum melting, and performing powder preparation by centrifugal gas atomization method, wherein the rotating speed of a centrifuge is 12000rad/min, methane gas is used for gas atomization, and methane is used as protective gas.
And step 3: the FeAlSiC alloy coating is prepared on a 1Cr8Ni9Ti stainless steel substrate by a plasma spraying method, and the parameters of the plasma spraying process method are as follows: voltage 54.5V, current 600A, spraying distance 80mm, argon pressure 0.9MPa, flow 47L/min, hydrogen pressure 0.36MPa, flow 1.5L/min, and coating thickness 350 μm.
And 4, step 4: carrying out heat treatment on the alloy coating under the protection of methane atmosphere; the heat treatment temperature is 730 ℃, the heating rate is 5 ℃/min, the heat preservation time is 30min, and the furnace cooling is carried out.
And in microhardness test of the sample after heat treatment, the average hardness of the coating is 480HV, the average volume fraction of graphite is 10.1%, the friction coefficient of the coating in a friction and wear test is 0.21, and the wear loss is 1.5 mg.
Example 3:
the content of FeAlSiC alloy elements is respectively Al: 3.9% Si: 3.7%, C: 5.7%, Fe: 86.7 percent; the particle size of the alloy powder is 40-50 μm.
Step 1: pretreating a vermicular cast iron RuT350 matrix; will be provided with
Figure BDA0002257360320000062
The iron-based sample is degreased and derusted, then is cleaned and dried by acetone after being dried, and is cleaned and dried by SiO2And carrying out sand blasting treatment to remove an oxide layer and impurities on the surface.
Step 2: vacuum melting, and performing powder preparation by centrifugal gas atomization method, wherein the rotating speed of a centrifuge is 12000rad/min, methane gas is used for gas atomization, and methane is used as protective gas.
And step 3: the FeAlSiC alloy coating is prepared on the vermicular cast iron RuT350 substrate by a plasma spraying method, and the parameters of the plasma spraying process method are as follows: the voltage is 60.5V, the current is 600A, the spraying distance is 80mm, the argon gas pressure is 0.9MPa, the flow is 47L/min, the hydrogen gas pressure is 0.36MPa, the flow is 2.1L/min, and the thickness of the coating is 350 mu m.
And 4, step 4: carrying out heat treatment on the alloy coating under the protection of methane atmosphere; the heat treatment temperature is 760 ℃, the heating rate is 5 ℃/min, the heat preservation time is 30min, and the furnace cooling is carried out.
And in microhardness test of the sample after heat treatment, the average hardness of the coating is 450HV, the average volume fraction of graphite is 13.1%, the friction coefficient of the coating in a friction and wear test is 0.19, and the wear loss is 1.2 mg.
Example 4:
the content of FeAlSiC alloy elements is respectively Al: 4.0% Si: 3.6%, C: 6.0%, Fe: 86.7 percent; the particle size of the alloy powder is 40-50 μm.
Step 1: pretreating a gray iron HT250 matrix; will be provided with
Figure BDA0002257360320000071
The iron-based sample is degreased and derusted, then is cleaned and dried by acetone after being dried, and is cleaned and dried by SiO2And carrying out sand blasting treatment to remove an oxide layer and impurities on the surface.
Step 2: vacuum melting, and performing powder preparation by centrifugal gas atomization method, wherein the rotating speed of a centrifuge is 12000rad/min, methane gas is used for gas atomization, and methane is used as protective gas.
And step 3: the FeAlC alloy coating is prepared on the gray iron HT250 substrate by a plasma spraying method, and the parameters of the plasma spraying process method are as follows: voltage 58.5V, current 600A, spraying distance 80mm, argon pressure 0.9MPa, flow 47L/min, hydrogen pressure 0.36MPa, flow 1.9L/min, and coating thickness 380 μm.
And 4, step 4: carrying out heat treatment on the alloy coating under the protection of methane atmosphere; the heat treatment temperature is 760 ℃, the heating rate is 5 ℃/min, and the heat preservation time is 60 min.
Spherical graphite is precipitated in the particles after heat treatment, small-particle graphite is also precipitated at the interface, and the average hardness of the coating is 430HV, the average volume fraction of graphite is 9.5 percent, the friction coefficient in the friction and wear test is 0.22, and the wear loss is 1.5mg in the microhardness test of the sample after heat treatment.

Claims (8)

1. The preparation method of the iron-based alloy wear-resistant antifriction coating is characterized by comprising the following steps:
pretreating the iron-based alloy;
using Fe, Al, Si and C as raw materials, and performing gas atomization method powder making under the protection of methane;
spraying FeAlSiC alloy powder on the surface of the iron-based alloy by adopting a plasma spraying method to form a coating;
and carrying out heat treatment on the coating under the protection of a methane atmosphere.
2. The preparation method of the iron-based alloy wear-resistant and antifriction coating according to claim 1, characterized in that the FeAlSiC alloy powder contains the following components: 3.7 to 4.0 percent of Al, 3.5 to 3.7 percent of Si, 5.5 to 6 percent of C and the balance of Fe.
3. The preparation method of the iron-based alloy wear-resistant and antifriction coating according to claim 2, characterized in that the pretreatment method in the first step is as follows: degreasing and derusting, cleaning with acetone, drying, and cleaning with SiO2And carrying out sand blasting treatment.
4. The method for preparing the iron-based alloy wear-resistant and anti-friction coating according to claim 3, wherein the main gas in the plasma spraying in the third step is argon, the auxiliary gas is hydrogen, the parameters of the plasma spraying method are 54.5V of voltage, 550A of current, 80mm of spraying distance, 0.9MPa of argon pressure, 47L/min of flow rate, 0.36MPa of hydrogen pressure, 1.5L/min of flow rate, and the thickness of the coating is 400 μm.
5. The preparation method of the iron-based alloy wear-resistant and antifriction coating according to any one of claims 1 to 4, characterized in that in the fourth step, a tubular atmosphere protection furnace protected by methane atmosphere is adopted for heat treatment, the heat treatment temperature is 700 ℃ to 760 ℃, and the heat preservation time is 30min to 60 min.
6. An iron-based alloy having a wear-resistant and friction-reducing coating, comprising:
an iron-based alloy, which is composed of,
a FeAlSiC coating which is coated on the surface of the iron-based alloy and is used for increasing the wear resistance and the friction reduction of the iron-based alloy,
wherein the FeAlSiC alloy powder comprises the following components in percentage by weight: 3.7 to 4.0 percent of Al, 3.5 to 3.7 percent of Si, 5.5 to 6 percent of C and the balance of Fe.
7. An iron-based part having an iron-based alloy wear-resistant and friction-reducing coating, comprising:
an iron-based part having a base material,
and the FeAlSiC coating is coated on the surface of the iron-based alloy and is used for increasing the wear resistance and the friction reduction of the iron-based part.
8. The application of the iron-based part with the iron-based alloy wear-resistant and antifriction coating is characterized in that the iron-based part with the FeAlSiC coating is used for manufacturing high-temperature moving parts of a high-horsepower engine.
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CN111363965A (en) * 2020-04-03 2020-07-03 中国南方电网有限责任公司超高压输电公司柳州局 Iron-based composite coating for reinforcing steel transmission tower, preparation method and material
CN113833745A (en) * 2021-09-23 2021-12-24 珠海格力节能环保制冷技术研究中心有限公司 Friction pair assembly, air bearing assembly and air compressor

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CN113833745A (en) * 2021-09-23 2021-12-24 珠海格力节能环保制冷技术研究中心有限公司 Friction pair assembly, air bearing assembly and air compressor

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