CN112144055A - Iron-based alloy powder for repairing surface of plunger of water injection pump in oil field and preparation method thereof - Google Patents
Iron-based alloy powder for repairing surface of plunger of water injection pump in oil field and preparation method thereof Download PDFInfo
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- CN112144055A CN112144055A CN202010888519.3A CN202010888519A CN112144055A CN 112144055 A CN112144055 A CN 112144055A CN 202010888519 A CN202010888519 A CN 202010888519A CN 112144055 A CN112144055 A CN 112144055A
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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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/106—Coating with metal alloys or metal elements only
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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- Powder Metallurgy (AREA)
Abstract
The invention discloses iron-based alloy powder for repairing the surface of a plunger of an oil field water injection pump and a preparation method thereof, wherein the iron-based alloy powder comprises the following elements in percentage by mass: 0.5-0.8% of C; 14.0-15% of Cr; 1.0-2.0% of Si; 0.6-1.0% of P; 0.2-0.3% of S; 4.0-6.0% of Ni; the balance of Fe. The novel iron-based alloy metal powder disclosed by the invention takes the iron element as a main body, the Ni element is added, so that the strength of the powder is greatly increased, and meanwhile, the Cr element and the Si element are added according to the corrosivity of water quality of a Changqing oil field, so that the powder has strong corrosion resistance.
Description
Technical Field
The invention relates to the technical field of surface remanufacturing of oilfield mechanical equipment, in particular to iron-based alloy powder for improving the erosion corrosion resistance of the surface of a plunger of an oilfield water injection pump by using a laser cladding technology.
Background
The plunger in the water injection pump system of the Changqing oilfield is a quick-wear part, the base material of the plunger is 45# steel, the surface material of the plunger is conventional chromium-plated alloy (the components mainly contain chromium), and the plunger has certain hardness and wear resistance, but the contents of bacteria and sulfides in the water injected into the Changqing oilfield are higher, the plunger of the water injection pump reciprocates under the pressure of 15 MPa-20 MPa, the chromium-plated alloy on the surface of the plunger cannot meet the working condition requirements of the oilfield, so that the defects of scratches, grooves and the like appear on the surface of the plunger, and the sealing performance of the water injection pump is further influenced, but at present, no effective repairing means exists temporarily in the oilfield, and the. The iron-based alloy powder capable of repairing the damaged plunger and effectively improving the erosion corrosion resistance of the surface of the plunger is developed according to the actual water quality and working conditions of the Changqing oil field, a coating prepared from the iron-based alloy powder has high hardness and strong corrosion resistance, the surface of the waste plunger is repaired by using the iron-based alloy powder, the service life of the waste plunger can be effectively prolonged, and the purposes of reutilization, cost reduction and efficiency improvement are achieved.
The existing conventional metal powder comprises nickel-based alloy powder and cobalt-based alloy powder, the hardness and corrosion resistance of the cobalt-based alloy powder cannot meet the production requirements of an oil field water injection pump, and the nickel-based alloy powder has high hardness and corrosion resistance but high cost. The iron-based alloy mainly contains iron elements, has high wear resistance, can be added with other wear-resistant and corrosion-resistant elements to improve the overall comprehensive performance, can form good combination degree with 45# steel under the treatment of a laser cladding technology, has reasonable cost and high cost performance, and therefore needs to form the iron-based alloy powder according to the actual working conditions of Changqing oil fields by optimizing the formula, and meets the requirements of high wear resistance and high corrosion resistance.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide alloy powder for repairing the surface of a plunger of a water injection pump, which is suitable for the production of the water injection pump in an oil field, and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions.
The iron-based alloy powder for repairing the surface of the plunger of the oilfield water injection pump comprises the following elements in percentage by mass:
as a further improvement of the invention, the alloy comprises the following elements in percentage by mass:
as a further improvement of the invention, the alloy comprises the following elements in percentage by mass:
as a further improvement of the invention, the alloy comprises the following elements in percentage by mass:
as a further improvement of the invention, the alloy comprises the following elements in percentage by mass:
the preparation method of the iron-based alloy powder for repairing the surface of the plunger of the oilfield water injection pump comprises the following steps of:
adding the seven elements into a metal powder mixer according to the mass percentage, and mixing at the temperature of 45-55 ℃, the mixing rotating speed of 300-400 revolutions per minute and the mixing time of 4-6 minutes to obtain the iron-based alloy powder.
As a further improvement of the invention, the iron-based alloy powder is used as a surface material, and the surface of the plunger is repaired by a laser cladding method, so that the hardness of the obtained surface coating reaches above 60 HRC.
As a further improvement of the invention, the material of the plunger matrix is 45# steel.
Compared with the prior art, the invention has the following beneficial effects:
the novel iron-based alloy metal powder disclosed by the invention takes the iron element as a main body, the Ni element is added, so that the strength of the powder is greatly increased, and meanwhile, the Cr element and the Si element are added according to the corrosivity of water quality of a Changqing oil field, so that the powder has strong corrosion resistance. The nickel-based alloy powder has the advantages that Fe is used as a main element, the basic hardness value is guaranteed, elements such as Ni, Cr and Si are added, the wear resistance and corrosion resistance of the powder are improved, the production requirements of the oilfield water injection pump can be met, and meanwhile, the relative performance is better. On the premise of ensuring the repairing quality of the plunger, the erosion resistance of the surface of the plunger can be effectively improved, and the service life of the plunger can be effectively prolonged. The invention has the following advantages:
1. the preparation process is simple, and the process operation is relatively simple;
2. the cost is relatively low, and the comprehensive cost performance is high;
3. the alloy coating prepared from the powder has high wear resistance, corrosion resistance and scouring resistance, and can meet the repair requirement and production requirement of the failed plunger in an oil field water injection system;
4. the powder can form a high-performance coating on the surface of the plunger through a laser cladding technology, has extremely high bonding strength (can achieve metallurgical bonding) with a plunger substrate (45# steel), avoids the coating from falling off, and enhances the comprehensive performance of the surface of the plunger.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The iron-based alloy powder for repairing the surface of the plunger disclosed by the invention comprises the following components in percentage by weight:
the powder consists of seven elements of C, Cr, Si, P, S, Fe and Ni, wherein the iron element is a main element;
the component proportion (mass percentage) of each element is as follows:
0.5-0.8% of C; 14.0-15% of Cr; 1.0-2.0% of Si; 0.7-1.0% of P; 0.2-0.3% of S; 4.0-6.0% of Ni; the balance being Fe.
The preparation method of the iron-based alloy powder comprises the following steps:
the mixing device is made by a metal powder mixer, the working temperature is 50 ℃, the mixing rotating speed is 300-400 r/min, and the mixing time is 5 min.
The iron-based alloy powder of the invention has the following functions of each element:
1) fe element accounts for about 75-80% of the total composition and is the main element of high hardness of the powder;
2) the corrosion resistance of the powder is enhanced by adding Ni;
3) the Cr element can improve the hardness and the wear resistance of the powder, and has good high-temperature oxidation resistance and oxidation medium corrosion resistance when the content exceeds 12 percent;
4) si and P elements can improve the hardness of the powder and obviously reduce the brittleness of steel;
5) the powder is combined with a laser cladding surface treatment technology, so that the surface hardness of the plunger can reach more than 60HRC, and the corrosion resistance does not corrode for 96 hours under the indoor salt spray corrosion test environment condition.
The principle of the invention is as follows: the iron-based alloy powder developed by the invention is more advantageous in repairing the failed plunger on the surface of an oil field and improving the surface wear resistance and corrosion resistance, because the iron-based alloy powder is prepared by optimizing the formula of the alloy powder according to the water quality of the oil field on the basis of 45# steel serving as a base material of the plunger of the water injection pump in the oil field, taking Fe as a main element to ensure the basic hardness value, and then adding elements such as Ni, Cr, Si and the like to improve the wear resistance and corrosion resistance of the powder, so that the production requirement of the water injection pump in the oil field can be met, and meanwhile, the nickel-based alloy powder with better relative performance has the advantage of low price, can effectively improve the erosion resistance and service life of the surface of the plunger on the premise of ensuring the repair quality of the plunger, reduce the use cost of.
The present invention will be described in detail with reference to specific examples.
Example 1:
0.4g of C, 7g of Cr, 0.75g of Si, 0.45g of P, 0.15g of S, 2.5g of Ni and 38.75g of Fe were added to a metal powder mixer, the temperature was set at 50 ℃, the mixing speed was 305 rpm, and the mixing time was 5 minutes to obtain 50g of gray iron-based alloy powder.
The powder is used as a surface material to repair the surface of the plunger, and the hardness of the obtained surface coating reaches 65HRC and exceeds the hardness (52HRC) of the original plunger coating; the time for the original surface coating of the plunger and the new surface coating to generate corrosion phenomena under the indoor salt spray corrosion test environment condition is 84 hours and 108 hours respectively, the corrosion resistance is greatly improved, and the design requirement is met.
Example 2:
0.38g of C, 7.5g of Cr, 0.9g of Si, 0.3g of P, 0.15g of S, 2.0g of Ni and 38.77g of Fe were added to a metal powder mixer, the temperature was set at 50 ℃, the mixing speed was 350 revolutions/min, and the mixing time was 5 minutes to obtain 50g of gray iron-based alloy powder.
The powder is used as a surface material to repair the surface of the plunger, and the hardness of the obtained surface coating reaches 65HRC and exceeds the hardness (52HRC) of the original plunger coating; the time for the original surface coating of the plunger and the new surface coating to generate corrosion phenomena under the indoor salt spray corrosion test environment condition is 84 hours and 106 hours respectively, the corrosion resistance is greatly improved, and the design requirement is met.
Example 3:
0.35g of C, 7.5g of Cr, 0.95g of Si, 0.35g of P, 0.1g of S, 2.8g of Ni and 37.95g of Fe were added to a metal powder mixer, the temperature was set at 50 ℃, the mixing speed was 360 rpm, and the mixing time was 5 minutes to obtain 50g of gray iron-based alloy powder.
The powder is taken as a surface material to repair the surface of the plunger, and the hardness of the obtained surface coating reaches 63HRC and exceeds the hardness (52HRC) of the original plunger coating; the time for the original surface coating of the plunger and the new surface coating to generate corrosion phenomena under the indoor salt spray corrosion test environment condition is 84 hours and 110 hours respectively, the corrosion resistance is greatly improved, and the design requirement is met.
Example 4:
adding 0.25g of C into a metal powder mixer; 7.0g of Cr; 0.5g of Si; p0.35 g; s0.1; 2.0g of Ni; fe 39.8. The temperature was set at 50 ℃ and the mixing speed was 305 rpm for 5min to obtain 50g of gray iron-based alloy powder.
The powder is used as a surface material to repair the surface of the plunger, and the hardness of the obtained surface coating reaches 64HRC and exceeds the hardness (52HRC) of the original plunger coating; the time for the original surface coating of the plunger and the new surface coating to generate corrosion phenomena under the indoor salt spray corrosion test environment condition is 84 hours and 110 hours respectively, the corrosion resistance is greatly improved, and the design requirement is met.
Example 5:
adding 0.4g of C into a metal powder mixer; 7.5g of Cr; si 1.0 g; p is 0.5 g; 0.15g of S; 3.0g of Ni; fe37.45g, temperature set at 50 ℃, mixing speed 305 rpm, mixing time 5min to obtain 50g of gray iron-based alloy powder.
The powder is taken as a surface material to repair the surface of the plunger, and the hardness of the obtained surface coating reaches 62HRC and exceeds the hardness (52HRC) of the original plunger coating; the time for the original surface coating of the plunger and the new surface coating to generate corrosion phenomena under the indoor salt spray corrosion test environment condition is 84 hours and 100 hours respectively, the corrosion resistance is greatly improved, and the design requirement is met.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicant consider that such subject matter is not considered part of the disclosed subject matter.
Claims (8)
1. The iron-based alloy powder for repairing the surface of the plunger of the water injection pump in the oil field is characterized by comprising the following elements in percentage by mass:
2. the iron-based alloy powder for repairing the plunger surface of the water injection pump in the oil field according to claim 1, which is characterized by comprising the following elements in percentage by mass:
3. the iron-based alloy powder for repairing the plunger surface of the water injection pump in the oil field according to claim 1, which is characterized by comprising the following elements in percentage by mass:
4. the iron-based alloy powder for repairing the plunger surface of the water injection pump in the oil field according to claim 1, which is characterized by comprising the following elements in percentage by mass:
5. the iron-based alloy powder for repairing the plunger surface of the water injection pump in the oil field according to claim 1, which is characterized by comprising the following elements in percentage by mass:
6. the preparation method of the iron-based alloy powder for repairing the plunger surface of the oilfield water injection pump, which is characterized by comprising the following steps of:
adding the seven elements into a metal powder mixer according to the mass percentage, and mixing at the temperature of 45-55 ℃, the mixing rotating speed of 300-400 revolutions per minute and the mixing time of 4-6 minutes to obtain the iron-based alloy powder.
7. The preparation method of claim 6, wherein the iron-based alloy powder is used as a surface material, and the plunger is subjected to surface repair by a laser cladding method to obtain a surface coating with hardness of more than 60 HRC.
8. The method as claimed in claim 7, wherein the plunger substrate is 45# steel.
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| CN202010888519.3A CN112144055A (en) | 2020-08-28 | 2020-08-28 | Iron-based alloy powder for repairing surface of plunger of water injection pump in oil field and preparation method thereof |
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| CN202010888519.3A CN112144055A (en) | 2020-08-28 | 2020-08-28 | Iron-based alloy powder for repairing surface of plunger of water injection pump in oil field and preparation method thereof |
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| CN112144055A true CN112144055A (en) | 2020-12-29 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994896A (en) * | 2011-09-07 | 2013-03-27 | 日立粉末冶金株式会社 | Sintered alloy and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994896A (en) * | 2011-09-07 | 2013-03-27 | 日立粉末冶金株式会社 | Sintered alloy and manufacturing method thereof |
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Application publication date: 20201229 |