CN114164385A - Preparation method and application of high-corrosion-resistance and high-strength iron-based amorphous powder and coating - Google Patents
Preparation method and application of high-corrosion-resistance and high-strength iron-based amorphous powder and coating Download PDFInfo
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- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING 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
- C23C—COATING 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/002—Making metallic powder or suspensions thereof amorphous or microcrystalline
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making 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
- B22F9/082—Making 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/02—Amorphous alloys with iron as the major constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING 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
- C23C—COATING 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making 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
- B22F9/082—Making 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
- B22F2009/0844—Making 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 in controlled atmosphere
Abstract
The invention relates to a preparation method and application of an iron-based amorphous alloy coating with wear resistance and corrosion resistance, which comprises the following components in atomic percentage: fe: 54%, Cr: 15%, Mo: 6%, W: 5%, P: 10%, C: 4%, B: 4%, Si: 2 percent. The invention also provides a preparation method of the corrosion-resistant iron-based amorphous alloy coating, which comprises the following steps: proportioning raw materials, and smelting by using a vacuum induction smelting furnace to obtain a master alloy ingot; preparing the mother alloy ingot obtained in the step (1) by using a vacuum multi-stage atomization method to obtain iron-based amorphous alloy powder; cleaning, sandblasting and roughening the surface of a steel substrate, and preheating; the surface of the steel substrate is prepared into the corrosion-resistant iron-based amorphous alloy coating by the supersonic flame spraying technology. The invention also provides application of the corrosion-resistant iron-based amorphous alloy coating.
Description
Technical Field
The invention relates to the field of corrosion protection and frictional wear of amorphous alloy coatings, in particular to a corrosion-resistant and frictional-resistant iron-based amorphous alloy coating, and a preparation method and application thereof.
Background
In the production of petroleum industry, materials are generally facedHigh temperature, high pressure, high sulfur, high CO2Severe corrosive environments such as high chlorine, high mineralization and slurry scouring, and the service problems of the materials brought by high temperature and high pressure are particularly serious. Severe production environments cause severe corrosion and wear to oil and gas drilling tools and conveying pipelines, so that key equipment and parts have to be regularly detected and replaced in the production process, the production efficiency is influenced, and the production cost is increased. Moreover, severe corrosion of equipment and piping often results in significant safety production accidents, resulting in serious casualties and significant economic losses. Taking the Xinjiang electric power industry as an example, nearly 80% of the total generated energy of Xinjiang is used for thermal power generation. The problems of corrosion and abrasion of water wall tubes, superheater tubes, reheater tubes and economizer tubes (boiler four tubes for short) of a boiler in thermal power generation are long-term puzzled economic and technical problems of a power plant. High temperature corrosion and erosion wear make the pipe wall attenuate, and serious person can cause revealing of "four pipes", hidden danger in the greatly increased power plant production process has increased the work load of interim maintenance and overhaul, has improved the manufacturing cost of enterprise. In the chemical industry, a large amount of equipment, valves and pipelines are also subjected to a serious problem caused by corrosion and abrasion. How to improve the service performance of the equipment and prolong the service life of the equipment becomes the first problem to be solved urgently for restricting the economic benefit development of the enterprises in the industry and enhancing the core competitiveness.
Amorphous alloys are the third generation of revolutionary materials behind metals and plastics, which exhibit superior strength and corrosion resistance compared to traditional crystalline alloy materials. Since the glass forming ability of amorphous alloys is small, it is usually necessary to use a large cooling rate (-10)6K/s), which leads to that the amorphous alloy can only be prepared into micron-sized thin strips, wires or powder, and the size is not enough, which causes that the amorphous alloy has great limitation in practical engineering application. The modern advanced spraying technology is adopted to prepare the surface amorphous alloy coating, so that the difficulty of the size limitation of the amorphous alloy is effectively avoided, and a new field of the application of the amorphous alloy is developed. The amorphous alloy coating is an amorphous uniform single phase, has no crystal defects such as grain boundaries, dislocations and the like, and thus exhibitsExtremely high strength, toughness and wear and corrosion resistance properties, which are not comparable to those of the traditional crystalline metal coating.
Disclosure of Invention
The invention aims to provide an amorphous alloy coating component system with excellent performance, a preparation method and application of an amorphous alloy coating through component design and element substitution, and aims to prepare a corrosion-resistant, wear-resistant and high-strength Fe-based amorphous alloy coating through component design and adjustment processes so as to solve the problems of engineering corrosion and wear in industries such as petroleum, electric power and the like.
In order to achieve the above purpose, the invention adopts the following technical scheme, as shown in the attached figure 1 of the specification.
1. The corrosion-resistant iron-based amorphous alloy coating is characterized by comprising the following components in parts by mass: (50-54): (15-20): (6-10): (4-6): (5-7): (8-12): (2-6): (2-4).
Further, the components contained in the paint comprise the following components in atomic percentage: fe: 54%, Cr: 15%, Mo: 6%, W: 5%, P: 10%, C: 4%, B: 4%, Si: 2 percent. The amorphous rate of the amorphous silicon film reaches more than 97 percent. The invention also comprises a preparation method of the corrosion-resistant iron-based amorphous alloy coating, which is characterized by comprising the following steps:
(1) proportioning raw materials, and smelting by using a vacuum induction smelting furnace to obtain a master alloy ingot;
(2) preparing the mother alloy ingot obtained in the step (1) by using a vacuum gas atomization method to obtain iron-based amorphous alloy powder;
(3) carrying out surface degreasing, cleaning, sand blasting coarsening and preheating treatment on the surface of a steel substrate;
(4) and (4) preparing the corrosion-resistant and friction-resistant iron-based amorphous alloy coating on the surface of the steel substrate treated in the step (3) by using a supersonic flame spraying technology.
Further, in the step (1), a vacuum induction smelting furnace is used for repeatedly smelting for 3-4 times, and the temperature in the furnace is kept for 10 minutes along with the furnace, so that the components of the mother-nucleus alloy cast ingot are uniform. The particle size of the iron-based amorphous powder in the step (2) is 15-53 mu m, and the powder fluidity is 30s/50 g. In the step (3), a supersonic flame spray gun is used for quickly sweeping the surface of the steel substrate in the preheating treatment of the steel substrate, so that the temperature of the steel substrate reaches 80-120 ℃. In the step (4), the kerosene fuel and the high-pressure oxygen are fully combusted in the combustion chamber, and the iron-based amorphous alloy powder is sprayed to the surface of the steel substrate subjected to surface treatment in an accelerating manner to form the iron-based amorphous alloy coating. The technological parameters of the step (4) are as follows: the kerosene flow is 24L/h, the oxygen flow is 32L/h, the pressure in the combustion chamber is 7.5MPa, the spraying distance is 330mm, and the thickness of the coating is 290 mu m.
The application of the corrosion-resistant iron-based amorphous alloy coating comprises the following steps: it is coated on the surface of high-pressure blower impeller, slurry pump impeller, conveying impeller, guide vane ring and cover shell for preventing corrosion and wear of fluid.
Drawings
FIG. 1 is a technical roadmap for the present invention;
FIG. 2 is an XRD curve of the Fe-based amorphous alloy powder and the Fe-based amorphous alloy coating according to the present invention;
FIG. 3 is a DSC curve of the Fe-based amorphous alloy coating of the present invention;
FIG. 4 is an SEM image of a cross section of an Fe-based amorphous alloy coating and a 316 stainless steel substrate in accordance with the present invention;
FIG. 5 is a zeta potential polarization curve of the Fe-based amorphous alloy coating in 3.5% NaCl solution according to the present invention;
FIG. 6 is a Vickers hardness diagram of the cross section of the Fe-based amorphous alloy coating and 316 stainless steel substrate according to the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.
The metal is as follows Fe54Cr15Mo6W5P10C4B4Si2The atomic fraction of the iron-based amorphous alloy coating is proportioned, and the Fe is obtained by smelting in a vacuum induction smelting furnace54Cr15Mo6W5P10C4B4Si2Iron-based master alloyAnd (5) ingot casting. The purity of the metal raw material is more than 99.99 percent, and the P element of the metal raw material contains Fe3Adding the P compound in a form, repeatedly melting for 3-4 times in the melting process by using a vacuum induction melting furnace, and keeping the temperature along with the furnace for 10 minutes to ensure that the components of the cast ingot of the iron-based alloy are uniform.
1. And (2) preparing the iron-based master alloy ingot casting in the step (1) by using a vacuum multi-stage atomization method to obtain iron-based amorphous alloy powder, and screening the particle size to obtain the iron-based amorphous alloy powder with the particle size of 15-53 mu m. When the iron-based amorphous alloy powder is prepared by the vacuum gas atomization method, argon is used as a protective atmosphere to prepare the obtained iron-based amorphous alloy powder, most of the prepared iron-based amorphous alloy powder is spherical or approximately spherical, the powder has high sphericity and a smooth surface, and the fluidity of the powder obtained by testing is 30s/50 g.
2. The surface of a 316L stainless steel matrix with the thickness of 10 multiplied by 5mm is degreased, cleaned, roughened by sand blasting and preheated. Sequentially polishing with 150, 400 and 800-mesh sand paper, and cleaning with acetone to remove stains; using Al2O3Carrying out sand blasting coarsening treatment on the particles, wherein the sand blasting coarsening treatment is carried out within two hours before spraying; and (3) carrying out quick-sweeping preheating treatment on the surface of the substrate by using an HVOF supersonic flame spray gun to ensure that the temperature of the substrate reaches the range of 80-120 ℃.
3. The corrosion-resistant and friction-resistant iron-based amorphous alloy coating is prepared on the surface of a 316L stainless steel substrate by using an HVOF supersonic speed flame spraying technology. And (3) fully combusting kerosene fuel and high-pressure oxygen in a combustion chamber, and accelerating to spray the iron-based amorphous alloy powder onto the surface of the 316L stainless steel matrix treated in the step (3) to form the iron-based amorphous alloy coating. The specific parameters are as follows: the kerosene flow is 24L/h, the oxygen flow is 32L/h, the pressure in the combustion chamber is 7.5MPa, the spraying distance is 330mm, and the thickness of the coating is 290 mu m.
4. XRD data of the iron-based amorphous alloy powder and the iron-based amorphous coating are shown in figure 1, wherein the iron-based amorphous alloy powder is completely amorphous, the iron-based amorphous alloy coating has a sharp crystallization peak at 45 degrees, the iron-based amorphous alloy coating is an oxide of Cr, the amorphous content of the coating is 97.7%, and the iron-based amorphous coating has a very high amorphous proportion. The DSC curve of the iron-based amorphous coating obtained by spraying is shown in figure 2, the glass transition temperature Tg is 590.5 ℃, the crystallization starting temperature Tx is 620.3 ℃, the width of the supercooling liquid phase region Δ Tx =29.8 ℃, and the DSC curve has good thermodynamic stability and amorphous forming capability and long-term service stability. The section of the iron-based amorphous alloy coating and the 316L stainless steel substrate obtained by spraying is shown in fig. 3, so that the iron-based amorphous alloy coating and the 316L stainless steel substrate are well combined, the coating thickness is about 290 mu m, no large pores exist in the iron-based amorphous alloy coating, the density is high, and the porosity of the coating is calculated to be 0.07% by an image analysis method. The hardness of the iron-based amorphous alloy coating prepared by the method is tested by a microhardness tester, the load is 300g, the acting time is 15 seconds, and the average hardness of 10 randomly selected areas for measurement is 971 HV, as shown in figure 4.
The corrosion performance of the iron-based amorphous alloy coating prepared by the method is evaluated by an electrochemical workstation, as shown in fig. 5, the coating shows self-passivation characteristic by the potentiodynamic polarization curve of the coating in 3.5% NaCl solution, the passivation interval is more than 530 mV, and the passivation current density is 6.3x10-5A/m2The coating has a stable passive film and excellent corrosion resistance.
Claims (10)
1. The corrosion-resistant iron-based amorphous alloy coating is characterized by comprising the following components in parts by mass: (50-54): (15-20): (6-10): (4-6): (5-7): (8-12): (2-6): (2-4).
2. The corrosion-resistant fe-based amorphous alloy coating according to claim 1, comprising the following components in atomic percent: fe: 54%, Cr: 15%, Mo: 6%, W: 5%, P: 10%, C: 4%, B: 4%, Si: 2 percent.
3. The corrosion-resistant fe-based amorphous alloy coating of claim 1, wherein the coating amorphous fraction is above 97% and the porosity is less than 1%.
4. The preparation method of the corrosion-resistant iron-based amorphous alloy coating according to claims 1-3, comprising the following steps: (1) firstly, proportioning raw materials, and smelting by using a vacuum induction smelting furnace to obtain a master alloy ingot; (2) preparing the mother alloy ingot obtained in the step (1) by using a vacuum multi-stage atomization method to obtain iron-based amorphous alloy powder; (3) carrying out surface degreasing, cleaning, sand blasting coarsening and preheating treatment on the surface of a steel substrate; (4) and (4) preparing the corrosion-resistant iron-based amorphous alloy coating on the surface of the steel substrate treated in the step (3) by using a supersonic flame spraying technology.
5. The preparation method of the corrosion-resistant iron-based amorphous alloy coating according to the claims 1 to 4, wherein the vacuum induction melting furnace is used in the step (1) for more than 3 times, and the temperature is kept for 10 minutes along with the furnace, so as to ensure that the cast ingot of the iron master alloy has uniform components.
6. The method for preparing the corrosion-resistant Fe-based amorphous alloy coating according to claim 4, wherein the grain size of the Fe-based amorphous powder in the step (2) is 15-53 μm, and the powder flowability is 30s/50 g.
7. The method for preparing the corrosion-resistant Fe-based amorphous alloy coating according to claim 4, wherein in the step (3), the steel substrate is subjected to a preheating treatment on the steel substrate by using a supersonic flame spray gun to rapidly sweep the surface of the substrate, so that the temperature of the steel substrate reaches 80-120 ℃.
8. The method for preparing the corrosion-resistant iron-based amorphous alloy coating as claimed in claim 4, wherein in the step (4), kerosene fuel and high-pressure oxygen are used for sufficient combustion in a combustion chamber, and iron-based amorphous alloy powder is accelerated and sprayed onto the surface of the steel substrate which is subjected to surface degreasing, cleaning, sand blasting coarsening and preheating treatment to form the iron-based amorphous alloy coating.
9. The method for preparing the corrosion-resistant iron-based amorphous alloy coating according to claim 8, wherein the process parameters in the step (4) are as follows: the kerosene flow is 24L/h, the oxygen flow is 32L/h, the powder feeding rate is 100g/min, the pressure in the combustion chamber is 7.5MPa, the spraying distance is 330mm, and the thickness of the coating is 290 mu m.
10. The use of the corrosion-resistant Fe-based amorphous alloy coating according to claims 1-3, wherein the coating is applied to the surfaces of high pressure blower impeller, slurry pump impeller, delivery impeller, guide vane ring and housing to prevent corrosion and abrasion of fluid.
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| CN106756642A (en) * | 2016-12-21 | 2017-05-31 | 中国科学院金属研究所 | A kind of strong glass forming ability Fe-based amorphous alloy and the high-compactness amorphous alloy coating of resistance to long-term corrosion |
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