CN112063958A - Reciprocating pump plunger coated with amorphous alloy coating and processing technology thereof - Google Patents
Reciprocating pump plunger coated with amorphous alloy coating and processing technology thereof Download PDFInfo
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- CN112063958A CN112063958A CN202010735978.8A CN202010735978A CN112063958A CN 112063958 A CN112063958 A CN 112063958A CN 202010735978 A CN202010735978 A CN 202010735978A CN 112063958 A CN112063958 A CN 112063958A
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- 239000011248 coating agent Substances 0.000 title claims abstract description 100
- 238000000576 coating method Methods 0.000 title claims abstract description 100
- 229910000808 amorphous metal alloy Inorganic materials 0.000 title claims abstract description 61
- 238000005516 engineering process Methods 0.000 title claims abstract description 40
- 238000012545 processing Methods 0.000 title claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000010935 stainless steel Substances 0.000 claims abstract description 26
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 24
- 230000037452 priming Effects 0.000 claims abstract description 19
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 229910003310 Ni-Al Inorganic materials 0.000 claims abstract description 16
- 239000007822 coupling agent Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims description 35
- 238000010285 flame spraying Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 16
- 239000002987 primer (paints) Substances 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000005488 sandblasting Methods 0.000 claims description 6
- 238000012805 post-processing Methods 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 12
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000010410 layer Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000007751 thermal spraying Methods 0.000 description 4
- 239000006087 Silane Coupling Agent Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- PXHVJJICTQNCMI-OUBTZVSYSA-N nickel-60 atom Chemical compound [60Ni] PXHVJJICTQNCMI-OUBTZVSYSA-N 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/007—Alloys based on nickel or cobalt with a light metal (alkali metal Li, Na, K, Rb, Cs; earth alkali metal Be, Mg, Ca, Sr, Ba, Al Ga, Ge, Ti) or B, Si, Zr, Hf, Sc, Y, lanthanides, actinides, as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
-
- 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
-
- 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
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- 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
-
- 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
- C23C4/08—Metallic material containing only metal elements
-
- 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
- C23C4/18—After-treatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a reciprocating pump plunger coated with an amorphous alloy coating and a processing technology thereof, wherein the reciprocating pump plunger comprises a stainless steel-based blank plunger, and further comprises a priming coating, an amorphous alloy coating and an aminosilane coupling agent which are sequentially coated on a reciprocating area of the stainless steel-based blank plunger; the priming coating is Ni-Al powder; the amorphous alloy coating is an iron-based amorphous alloy coating and is prepared by base material design, surface texturing treatment, coating, post-treatment and hole sealing. The reciprocating pump plunger and the processing technology thereof improve the performances of the reciprocating pump plunger in the aspects of corrosion resistance, high temperature resistance, wear resistance, friction reduction, cavitation resistance and the like by using the coating with the amorphous structure.
Description
Technical Field
The invention relates to the technical field of mechanical manufacturing, in particular to a reciprocating pump plunger coated with an amorphous alloy coating and a processing technology thereof.
Background
In the manufacture of mechanical parts, it is often encountered that the surface layer of the part is required to have higher mechanical properties than the body of the part, such as hardness, strength, wear resistance, heat resistance, corrosion resistance, and the like. For this purpose, it is often used to coat the surface of the part with a layer of material having the desired properties, and this coating technique is widely used in machine manufacturing. Therefore, there is a need to provide a reciprocating pump plunger coated with an amorphous alloy coating to solve the above problems.
The oil exploitation in China mostly adopts a stratum water injection oil extraction mode, a reciprocating plunger water injection pump is key equipment for water injection oil extraction, the working pressure is about 10-40Mpa, a plunger is a core component of an oil field water injection pump, the injected water is the stratum extracted complex water and contains silt particles and corrosive substances, and due to the existence of abrasion, corrosion and pressure, the situation that a groove, pitting corrosion, a coating falls off and the like occur to the plunger, so that the poor sealing of the plunger causes the failure of the plunger. Because the plunger is invalid, equipment has to be shut down and replaced, production is influenced, and the frequent replacement cost of parts of the plunger is generated, so that the utilization rate of the equipment is reduced.
At present, the plunger of the domestic oil water injection pump generally adopts corrosion-resistant alloy as a base material, and alloy materials such as nickel 60 and the like are sprayed and welded on the surface of the plunger, so that the service life of the plunger with the working pressure of 30MPa is about 240 hours generally and the service life is short due to different water qualities.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a reciprocating pump plunger coated with an amorphous alloy coating and a processing technology thereof, which aim to solve the problem of short service life in the background technology, and simultaneously improve the performances of the reciprocating pump plunger in the aspects of corrosion resistance, high temperature resistance, wear resistance, friction reduction, cavitation resistance and the like by sequentially coating a priming coating, the amorphous alloy coating and an aminosilane coupling agent on a reciprocating area of a stainless steel-based blank plunger.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
a reciprocating pump plunger coated with an amorphous alloy coating comprises a stainless steel-based blank plunger, and a priming coating, an amorphous alloy coating and an aminosilane coupling agent which are sequentially coated on the reciprocating area of the stainless steel-based blank plunger;
the priming coating is Ni-Al powder;
the amorphous alloy coating is an iron-based amorphous alloy coating.
Preferably, the Ni content of the Ni-Al powder accounts for 80%, and the Al content of the Ni-Al powder accounts for 20%.
By adopting the technical scheme, the priming coating is Ni-Al powder and can form firm combination with the surface of the stainless steel matrix, the components of the priming coating generate exothermic chemical reaction at the high temperature of thermal spraying flame to produce intermetallic compounds, a large amount of heat is released, the thin layer on the surface of the matrix is heated to a molten state, and the sprayed molten particles and the surface of the matrix are promoted to form micro-area metallurgy. And the priming coating can form a compact oxidation-resistant and corrosion-resistant coating to prevent the invasion of oxygen or pores of a corrosion medium at high temperature and protect the base metal from oxidation and corrosion. Furthermore, a rough surface of the bonding primer layer can be formed, and the surface roughness degree of the rough surface of the bonding primer layer even exceeds the surface roughness degree of the sand blasting pretreatment, so that the bonding strength between the amorphous coating and the bonding primer layer can be improved.
Preferably, the iron-based amorphous alloy in the iron-based amorphous alloy coating is Fe79.8Cu0.6Nb2.6Si8B9。
By adopting the technical scheme, the iron-based amorphous alloy coating has the characteristics of low friction coefficient, good thermal conductivity, high binding force and the like, so that the iron-based amorphous alloy coating has unique charm in the application of the iron-based amorphous alloy coating in the field of surface engineering.
Meanwhile, the invention also provides a processing technology of the reciprocating pump plunger coated with the amorphous alloy coating, which comprises the following steps:
s1: designing a base material, wherein the base material is made of stainless steel, preliminary processing is carried out according to the design size of the plunger to obtain a stainless steel base blank plunger, coating allowance of 0.5mm is reserved on a single side of a reciprocating operation area of the plunger, and other areas all meet the design requirement of the plunger;
s2: performing surface texturing treatment, namely performing sand blasting texturing treatment on the surface of the plunger by adopting carborundum or sandstone with the same hardness, wherein the roughness is required to be more than Sa10.5 mu m;
s3: coating, namely spraying a primer coating in a reciprocating operation area of a reciprocating pump plunger by adopting a supersonic flame spraying technology, reducing the surface temperature of the reciprocating pump plunger to 50 ℃, and then spraying an amorphous alloy coating by adopting a second supersonic flame spraying technology, wherein the spraying thickness is 0.4 mm;
s4: and (4) post-processing, namely, grinding the reciprocating pump plunger obtained in the step (S3) by using a grinding machine to obtain a ground reciprocating pump plunger.
S5: sealing holes, namely sealing holes by adopting an aminosilane coupling agent, soaking for 3-4h at 50 ℃, and then curing to obtain the reciprocating pump plunger;
preferably, in the step S3, the thickness of the sprayed primer coating is 0.1 mm;
preferably, the curing process parameters of the step S5 are baking and curing at 125-140 ℃;
by adopting the technical scheme, the addition of the aminosilane coupling agent can obviously improve the adhesion between the coating and the substrate, and the silicon hydroxyl and the substrate are reacted by chemical bonds. The hole sealing agent has good wettability, strong cohesiveness, good chemical stability, and stronger corrosion resistance and impact resistance;
preferably, in the primary supersonic flame spraying technique in step S3, the process parameters are as follows: the flow rates of oxygen and nitrogen are 1700-1900SCFH and 22-26SCFH respectively, the spraying power is 18-24KW, the spraying distance is 380-400mm, and the powder feeding rate is 75-80 g/min;
preferably, in the second supersonic flame spraying technique in step S3, the process parameters are as follows: the flow rates of oxygen and nitrogen are 1630-;
by adopting the technical scheme, the processing technology adopts the supersonic flame spraying technology for spraying, and has the advantages that: (1) less heat input is used. Compared with thermal spraying technologies such as plasma spraying and electric arc spraying, the flame temperature is lower (600K-2200K is adjustable). The lower flame temperature ensures that the coating is not oxidized in the spraying process and prevents the nano particles from growing up. At the same time, the lower flame temperature prevents deformation of the substrate; (2) higher particle velocity. The sprayed particles are accelerated to the speed of 3-5 Mach cones after passing through a gun barrel, and the particles moving at high speed reach a base material and collide with the base material to deform to form a compact coating. In general, the higher the particle velocity, the better the particle flattening effect and thus the higher the bond strength. The flight velocity of the particles of the supersonic flame spraying technology is obviously superior to that of other thermal spraying technologies. In the supersonic flame spraying technology, particles are accelerated by a supersonic flame flow, and in other thermal spraying technologies, the particles reach the surface of a base material in a compressed gas mode; (3) higher deposition efficiency. Compared with the coating preparation technologies such as brush plating, PVD, CVD, sputtering and the like, the coating with the thickness meeting the use requirement can be prepared by the supersonic flame spraying technology within a short time, and the other spraying technologies can be completed within several hours; (4) the spraying limit is small. The supersonic flame spraying technology can be used for spraying outdoor large-scale workpieces and small workpieces, and the spraying thickness is controllable.
(III) advantageous effects
Compared with the prior art, the invention provides a reciprocating pump plunger coated with an amorphous alloy coating and a processing technology thereof, firstly a priming coating is sprayed on a stainless steel matrix to promote the sprayed molten particles and the surface of the matrix to form micro-area metallurgy, then an iron-based amorphous alloy layer is sprayed on the surface of the matrix, the hardness, the strength, the elasticity and the corrosion resistance of the surface of a metal component can be effectively improved, and finally an aminosilane coupling agent is used as a hole sealing agent to improve the corrosion resistance and the impact resistance of the matrix, so that the prepared reciprocating pump plunger has the bonding strength of 99-106MPa, the hardness of 89-95HRC, the porosity of 0.03-0.04%, and the service life of 2580 and 2675 hours under the working pressure of 15 MPa.
Drawings
FIG. 1 is a schematic view of a reciprocating pump plunger of the present invention after processing;
FIG. 2 is a schematic representation of the reciprocating pump plunger of the present invention prior to processing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1-2, a reciprocating pump plunger coated with an amorphous alloy coating comprises a stainless steel-based blank plunger, and a primer coating, an amorphous alloy coating and an aminosilane coupling agent which are sequentially coated on a reciprocating area of the stainless steel-based blank plunger;
the priming coating is Ni-Al powder;
the amorphous alloy coating is an iron-based amorphous alloy coating.
The Ni content of the Ni-Al powder accounts for 80%, and the Al content of the Ni-Al powder accounts for 20%.
The iron-based amorphous alloy in the iron-based amorphous alloy coating is Fe79.8Cu0.6Nb2.6Si8B9。
1-2, a process for manufacturing a reciprocating pump plunger coated with an amorphous alloy coating, comprising the steps of:
s1: designing a base material, wherein the base material is made of stainless steel, preliminary processing is carried out according to the design size of the plunger to obtain a stainless steel base blank plunger, coating allowance of 0.5mm is reserved on a single side of a reciprocating operation area of the plunger, and other areas all meet the design requirement of the plunger;
s2: performing surface texturing treatment, namely performing sand blasting texturing treatment on the surface of the plunger by adopting carborundum or sandstone with the same hardness, wherein the roughness is required to be Sa10.5-12 mu m;
s3: coating, namely spraying a priming coating with the thickness of 0.1mm in a reciprocating operation area of a reciprocating pump plunger by adopting a supersonic flame spraying technology, reducing the surface temperature of the reciprocating pump plunger to 50 ℃, and then spraying an amorphous alloy coating with the thickness of 0.4mm by adopting a second supersonic flame spraying technology; the primary supersonic flame spraying technology comprises the following process parameters: the flow rates of oxygen and nitrogen are 1700SCFH and 22SCFH respectively, the spraying power is 18KW, the spraying distance is 380mm, and the powder feeding rate is 75 g/min; the second supersonic flame spraying technology has the following technological parameters: the flow rates of oxygen and nitrogen are 1630SCFH and 25SCFH respectively, the spraying power is 16KW, the spraying distance is 340mm, and the powder feeding rate is 60 g/min;
s4: and (4) post-processing, namely, grinding the reciprocating pump plunger obtained in the step (S3) by using a grinding machine to obtain a ground reciprocating pump plunger.
S5: and sealing holes, namely sealing holes by adopting an aminosilane coupling agent, soaking for 3h at 50 ℃, and then baking and curing at 125 ℃ to obtain the reciprocating pump plunger.
Example 2
As shown in fig. 1-2, a reciprocating pump plunger coated with an amorphous alloy coating comprises a stainless steel-based blank plunger, and a primer coating, an amorphous alloy coating and an aminosilane coupling agent which are sequentially coated on a reciprocating area of the stainless steel-based blank plunger;
the priming coating is Ni-Al powder;
the amorphous alloy coating is an iron-based amorphous alloy coating.
The Ni content of the Ni-Al powder accounts for 80%, and the Al content of the Ni-Al powder accounts for 20%.
The iron-based amorphous alloy in the iron-based amorphous alloy coating is Fe79.8Cu0.6Nb2.6Si8B9。
1-2, a process for manufacturing a reciprocating pump plunger coated with an amorphous alloy coating, comprising the steps of:
s1: designing a base material, wherein the base material is made of stainless steel, preliminary processing is carried out according to the design size of the plunger to obtain a stainless steel base blank plunger, coating allowance of 0.5mm is reserved on a single side of a reciprocating operation area of the plunger, and other areas all meet the design requirement of the plunger;
s2: performing surface texturing treatment, namely performing sand blasting texturing treatment on the surface of the plunger by adopting carborundum or sand with the same hardness, wherein the roughness Sa12-14 mu m is required;
s3: coating, namely spraying a priming coating with the thickness of 0.1mm in a reciprocating operation area of a reciprocating pump plunger by adopting a supersonic flame spraying technology, reducing the surface temperature of the reciprocating pump plunger to 50 ℃, and then spraying an amorphous alloy coating with the thickness of 0.4mm by adopting a second supersonic flame spraying technology; the primary supersonic flame spraying technology comprises the following process parameters: the flow rates of oxygen and nitrogen are 1800SCFH and 24SCFH respectively, the spraying power is 19KW, the spraying distance is 420mm, and the powder feeding rate is 78 g/min; the second supersonic flame spraying technology has the following technological parameters: the flow rates of oxygen and nitrogen are 1720SCFH and 27SCFH respectively, the spraying power is 18KW, the spraying distance is 345mm, and the powder feeding rate is 63 g/min;
s4: and (4) post-processing, namely, grinding the reciprocating pump plunger obtained in the step (S3) by using a grinding machine to obtain a ground reciprocating pump plunger.
S5: and sealing holes, namely sealing holes by adopting an aminosilane coupling agent, soaking for 3.5h at 50 ℃, and then baking and curing at 130 ℃ to obtain the reciprocating pump plunger.
Example 3
As shown in fig. 1-2, a reciprocating pump plunger coated with an amorphous alloy coating comprises a stainless steel-based blank plunger, and a primer coating, an amorphous alloy coating and an aminosilane coupling agent which are sequentially coated on a reciprocating area of the stainless steel-based blank plunger;
the priming coating is Ni-Al powder;
the amorphous alloy coating is an iron-based amorphous alloy coating.
The Ni content of the Ni-Al powder accounts for 80%, and the Al content of the Ni-Al powder accounts for 20%.
The iron-based amorphous alloy in the iron-based amorphous alloy coatingGold being Fe79.8Cu0.6Nb2.6Si8B9。
1-2, a process for manufacturing a reciprocating pump plunger coated with an amorphous alloy coating, comprising the steps of:
s1: designing a base material, wherein the base material is made of stainless steel, preliminary processing is carried out according to the design size of the plunger to obtain a stainless steel base blank plunger, coating allowance of 0.5mm is reserved on a single side of a reciprocating operation area of the plunger, and other areas all meet the design requirement of the plunger;
s2: performing surface texturing treatment, namely performing sand blasting texturing treatment on the surface of the plunger by adopting carborundum or sandstone with the same hardness, wherein the roughness is required to be more than Sa13.5 mu m;
s3: coating, namely spraying a priming coating with the thickness of 0.1mm in a reciprocating operation area of a reciprocating pump plunger by adopting a supersonic flame spraying technology, reducing the surface temperature of the reciprocating pump plunger to 50 ℃, and then spraying an amorphous alloy coating with the thickness of 0.4mm by adopting a second supersonic flame spraying technology; the primary supersonic flame spraying technology comprises the following process parameters: the flow rates of oxygen and nitrogen are 1900SCFH and 26SCFH respectively, the spraying power is 24KW, the spraying distance is 400mm, and the powder feeding rate is 80 g/min; the second supersonic flame spraying technology has the following technological parameters: the flow rates of oxygen and nitrogen are 1810SCFH and 29SCFH respectively, the spraying power is 22KW, the spraying distance is 350mm, and the powder feeding rate is 65 g/min;
s4: and (4) post-processing, namely, grinding the reciprocating pump plunger obtained in the step (S3) by using a grinding machine to obtain a ground reciprocating pump plunger.
S5: and sealing holes, namely sealing holes by adopting an aminosilane coupling agent, soaking for 4h at 50 ℃, and then baking and curing at 140 ℃ to obtain the reciprocating pump plunger.
Comparative example 1
The plunger of the reciprocating pump has no priming coating, and no priming coating is added in the processing technology;
comparative example 2
The plunger of the reciprocating pump is formed without an amorphous alloy coating, and the amorphous alloy coating is not added in the processing technology;
comparative example 3
The plunger of the reciprocating pump is formed without amino silane coupling agent, and no amino silane coupling agent is added in the processing technology; conventional pore sealing agents are used.
The amino silane coupling agent is N-beta- (aminoethyl) -gamma-aminopropyl trimethoxy silane
The plungers of the reciprocating pumps prepared in the above examples 1 to 3 and comparative examples 1 to 3 were examined for the bonding between the coating and the stainless steel substrate, and the following data were obtained:
as can be seen from the above table, the plunger of the reciprocating pump prepared in the embodiments 1-3 has the bonding strength of 99-106MPa, the hardness of 89-95HRC, the porosity of 0.03-0.04%, and the service life of 2580-2675h under the working pressure of 15MPa, so that the coating and the processing technology adopted by the invention can ensure that the bonding effect between the base body and the coating of the plunger of the reciprocating pump is good, and the service life of the plunger of the reciprocating pump is prolonged;
comparative example 1, the prepared plunger of the reciprocating pump lacks the primer coating, the bonding strength is 70MPa, the hardness is 65HRC, the porosity is 0.26 percent, and the service life is 2105h under the working pressure of 15MPa, so that the bonding strength between the plunger of the reciprocating pump and the coating is reduced, the hardness is reduced, and the service life is also reduced in the absence of the primer coating;
comparative example 2, the amorphous alloy coating is lacked, the prepared reciprocating pump plunger has 55MPa of bonding strength, 48HRC of hardness, 0.35% of porosity and 1546h of service life under 15MPa of working pressure, and it can be seen that the bonding strength between the reciprocating pump plunger and the coating is obviously reduced, the hardness is obviously reduced and the service life is also obviously reduced in the absence of the amorphous alloy coating;
in comparative example 3, the plunger of the reciprocating pump prepared without the aminosilane coupling agent has 89MPa of bonding strength, 86HRC of hardness, 1.5% of porosity and 2209h of service life under 15MPa of working pressure, and the aminosilane coupling agent is seen to reduce the bonding strength between the plunger of the reciprocating pump and the coating, slightly reduce the hardness, obviously increase the porosity and reduce the service life.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The reciprocating pump plunger coated with the amorphous alloy coating comprises a stainless steel-based blank plunger and is characterized by further comprising a priming coating, an amorphous alloy coating and an aminosilane coupling agent which are sequentially coated on the reciprocating area of the stainless steel-based blank plunger;
the priming coating is Ni-Al powder;
the amorphous alloy coating is an iron-based amorphous alloy coating.
2. The amorphous alloy coated reciprocating pump plunger of claim 1, wherein the Ni-Al powder has a Ni content of 80% and an Al content of 20%.
3. The reciprocating pump plunger coated with the amorphous alloy coating of claim 1, wherein the Fe-based amorphous alloy in the Fe-based amorphous alloy coating is Fe79.8Cu0.6Nb2.6Si8B9。
4. A process for manufacturing a plunger for a reciprocating pump coated with an amorphous alloy coating according to any one of claims 1 to 3, comprising the steps of:
s1: designing a base material, wherein the base material is made of stainless steel, preliminary processing is carried out according to the design size of the plunger to obtain a stainless steel base blank plunger, coating allowance of 0.5mm is reserved on a single side of a reciprocating operation area of the plunger, and other areas all meet the design requirement of the plunger;
s2: performing surface texturing treatment, namely performing sand blasting texturing treatment on the surface of the plunger by adopting carborundum or sandstone with the same hardness, wherein the roughness is required to be more than Sa10.5 mu m;
s3: coating, namely spraying a primer coating in a reciprocating operation area of a reciprocating pump plunger by adopting a supersonic flame spraying technology, reducing the surface temperature of the reciprocating pump plunger to 50 ℃, and then spraying an amorphous alloy coating by adopting a second supersonic flame spraying technology, wherein the spraying thickness is 0.4 mm;
s4: post-processing, namely grinding the reciprocating pump plunger obtained in the step S3 by using a grinding machine to obtain a ground reciprocating pump plunger;
s5: and sealing holes, namely sealing holes by adopting an aminosilane coupling agent, soaking for 3-4h at 50 ℃, and then curing to obtain the reciprocating pump plunger.
5. The process of claim 4, wherein in step S3, the thickness of the sprayed primer coating is 0.1 mm.
6. The process as claimed in claim 4, wherein the curing process parameter of step S5 is baking at 125-140 ℃.
7. The process of claim 4, wherein the primary supersonic flame spraying technique in step S3 comprises the following steps: the flow rates of oxygen and nitrogen are 1700-1900SCFH and 22-26SCFH respectively, the spraying power is 18-24KW, the spraying distance is 380-400mm, and the powder feeding rate is 75-80 g/min.
8. The process of claim 4, wherein the second supersonic flame spraying technique in step S3 comprises the following steps: the flow rates of oxygen and nitrogen are 1630-.
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