CN212293720U - Melt and scribble-cryogenic treatment integration and strengthen slurry pump cylinder sleeve - Google Patents
Melt and scribble-cryogenic treatment integration and strengthen slurry pump cylinder sleeve Download PDFInfo
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- CN212293720U CN212293720U CN202020913523.6U CN202020913523U CN212293720U CN 212293720 U CN212293720 U CN 212293720U CN 202020913523 U CN202020913523 U CN 202020913523U CN 212293720 U CN212293720 U CN 212293720U
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Abstract
The invention provides a melt-coating and cryogenic treatment integrated reinforced slurry pump cylinder sleeve, which comprises a cylinder sleeve base body, a lining melt-coating layer and a metallurgical bonding interface layer formed between the cylinder sleeve base body and the lining melt-coating layer through melt-coating reinforcement. The thickness of the lining molten coating is 0.5-2 mm, the thickness of the metal bottom layer is 0.05-0.2 mm, the thickness of the metal ceramic working layer is within 2mm, and the process comprises the steps of cylinder sleeve base body pre-processing → lining coating pre-preparation → remelting → cryogenic treatment → stress relief tempering → cylinder sleeve post-finishing processing. The mud pump cylinder sleeve with high wear resistance, corrosion resistance and interface binding force is prepared by combining melt coating strengthening and deep cooling treatment through the cylinder sleeve structure design that the hard wear resistance and corrosion resistance of the special melt coating are unified with the strength and toughness of the matrix, so that the problems of the existing mud pump cylinder sleeve are solved, the long service life of the mud pump cylinder sleeve is ensured, the drilling and production efficiency is ensured, the operation cost is reduced, and the mud pump cylinder sleeve has good application value and wide market prospect.
Description
Technical Field
The invention relates to the technical field of drilling and production, in particular to a melt coating-cryogenic treatment integrated reinforced slurry pump cylinder sleeve.
Background
In the oil drilling and production industry, a drilling and production mud pump is one of eight large parts of a drilling machine and plays an indispensable role in the drilling and production process. The main function of the mud pump is to circulate the drilling and production flushing fluid inside and outside the shaft, flush the bottom of the well, cool the drill bit, fix the well wall and carry the rock debris to the ground. With the development and improvement of petroleum and chemical processes, the requirements on the power and pressure of the slurry pump are further increased, so that the working conditions of the hydraulic end of the slurry pump become worse, the requirements on wearing parts of the slurry pump become more severe, and the requirements on the cylinder sleeve of the slurry pump are the first time.
The problems of abrasion and corrosion of the cylinder sleeve of the slurry pump are solved by a plurality of researchers for many years, and the typical cylinder sleeve process approaches at present mainly comprise: firstly, a high-chromium cast iron inner sleeve is integrally cast in carbon steel, or the inner sleeve and the outer sleeve are matched with each other in a taper manner to form the bimetallic cylinder sleeve, so that the wear resistance and the corrosion resistance are poor under severe working conditions, and the service life is very short. Secondly, adopt inside lining engineering ceramic cylinder liner, although wearability and corrosion resistance have obvious promotion, whole price is higher, and hole processing difficulty, and production efficiency is low, in assembly and use, appear easily that the cooperation is too tight, inside lining pottery is broken or the scheduling problem that drops.
Disclosure of Invention
The invention provides a melt-coating and cryogenic treatment integrated reinforced slurry pump cylinder sleeve aiming at the defects in the prior art, and the slurry pump cylinder sleeve with high wear resistance, corrosion resistance and interface bonding force is prepared by combining melt-coating reinforcement and cryogenic treatment through the cylinder sleeve structure design that the high hardness, wear resistance and corrosion resistance of a special melt-coating layer based on the working condition of the slurry pump cylinder sleeve are unified with the toughness of a matrix, so that the problems of the conventional slurry pump cylinder sleeve are solved, the long service life of the slurry pump cylinder sleeve is ensured, a matched piston pair is powerfully protected, and the integral service life of a slurry pump is effectively prolonged.
In order to achieve the purpose, the invention adopts the following technical scheme:
the melt-coating-cryogenic treatment integrated reinforced slurry pump cylinder sleeve comprises a cylinder sleeve base body, a melt-coating-cryogenic treatment integrated reinforced lining melt-coating layer and a metallurgical bonding interface layer formed between the cylinder sleeve base body and the lining melt-coating layer through melt-coating reinforcement, wherein the melt-coating-cryogenic treatment integrated reinforced lining melt-coating layer consists of a melt-coated metal bottom layer and a melt-coated metal ceramic working layer.
Further, the cylinder sleeve substrate is made of medium carbon steel, the thickness of the lining fusion coating layer is 0.5-2 mm, the thickness of the metal bottom layer is 0.05-0.2 mm, and the thickness of the metal ceramic working layer meets the requirement of the total thickness of the lining fusion coating layer; the thickness of the interface layer is between 5 and 20 microns, the interface layer is a transition layer which is formed by a metal bottom layer and a cylinder sleeve substrate through a melt coating process and mainly combined through metallurgy, and the binding force of the transition layer is 300 to 500 MPa.
Further, the metal bottom layer is made of nickel-based self-fluxing alloy powder, the metal ceramic working layer is made of metal ceramic composite powder consisting of the nickel-based self-fluxing alloy powder, tungsten carbide and nitride, the mass content of the tungsten carbide is 20-50%, the nitride consists of one or more of transition metal nitrides, the total mass content of the nitride is 0.5-10%, and the balance is the nickel-based self-fluxing alloy powder.
The manufacturing method of the melt coating-cryogenic treatment integrated reinforced slurry pump cylinder sleeve mainly comprises the following steps: machining a cylinder sleeve base body before → preparing an inner lining coating layer in advance → remelting treatment → cryogenic treatment → destressing tempering → finishing the cylinder sleeve after.
Compared with the prior art, the invention has the following beneficial effects: the mud pump cylinder sleeve with high wear resistance, corrosion resistance and interface bonding force is prepared by combining melt coating strengthening and cryogenic treatment through the cylinder sleeve structure design that the hard wear resistance, corrosion resistance and matrix toughness of the special melt coating based on the working condition of the mud pump cylinder sleeve are unified, the problems of the existing mud pump cylinder sleeve are solved, the long service life of the mud pump cylinder sleeve is ensured, a matched piston pair is powerfully protected, and the whole service life of a mud pump is effectively prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a mud pump cylinder sleeve according to the present invention;
FIG. 2 is a schematic view of the process flow of the present invention.
Detailed Description
In order to make the technical means, innovative features, objectives and effects of the present invention easily understood, the present invention will be further described with reference to the following detailed drawings.
Example 1: the cylinder sleeve comprises a cylinder sleeve base body 1, a melt-coating and cryogenic treatment integrated reinforced liner melt-coating layer 2 and a metallurgical bonding interface layer 3 formed between the cylinder sleeve base body and the liner melt-coating layer through melt-coating reinforcement, wherein the cylinder sleeve base body 1 is medium carbon steel, and the melt-coating and cryogenic treatment integrated reinforced liner melt-coating layer 2 consists of a melt-coating metal bottom layer 4 and a melt-coating metal ceramic working layer 5.
Further, the thickness of the lining fused coating 2 is 1mm, wherein the thickness of the metal bottom layer 4 is 0.10mm, and the thickness of the metal ceramic working layer 5 is 0.90 mm; the thickness of the interface layer 3 is between 5um and 20um, a transition layer which is formed by the lining metal bottom layer 4 and the cylinder sleeve base body 1 through a melt coating process and mainly combined through metallurgy is formed, and the binding force reaches 300-500 MPa.
Further, the metal bottom layer 4: the powder is nickel-based self-fluxing alloy powder, the metal ceramic working layer 5 is metal ceramic composite powder mainly composed of nickel-based self-fluxing alloy powder, tungsten carbide, nitride and other hard phases, wherein the mass content of tungsten carbide is 20-50%, the nitride is composed of one or more transition metal nitrides, the total mass content of the nitride is 0.5-10%, and the balance is nickel-based self-fluxing alloy powder.
The melt coating-deep cooling integrated strengthening process step mainly comprises the steps of cylinder liner base body pre-processing (a) → lining coating pre-preparation (b) → remelting treatment (c) → deep cooling treatment (d) → stress removal tempering (e) → post-cylinder liner finishing (f):
(a) pre-processing a cylinder sleeve substrate: the inner hole of the cylinder sleeve base body is machined to reach the size required by the thickness of a liner molten coating to be reinforced, and machining allowance is reserved at other machining parts to ensure the size and the precision of the cylinder sleeve guaranteed by subsequent finish machining;
(b) pre-preparing a lining coating: through a flame spraying process, obtaining the spraying process parameters of the lining melt coating with specified components, specified structure and specified thickness according to the sequence of the metal bottom layer and the metal ceramic working layer: the pressure of oxygen and acetylene is 0.45-0.5 MPa and 0.08-0.1 MPa respectively, the flow rate is 960-1020L/min and 900-960L/min respectively, and the powder feeding flow rate is as follows: 81 g/min, spray distance: 190 mm.
(c) Remelting treatment: remelting the cylinder sleeve by inner hole induction heating to obtain an interface layer which is compact and realizes interface metallurgical bonding, wherein the inner hole induction heating remelting power is as follows: 360KVA, walking speed: 70 mm/min.
(d) Cryogenic treatment: placing the cylinder sleeve subjected to remelting treatment in liquid nitrogen for subzero treatment, so that the crystal structure and the mechanical property of an interface layer and a cylinder sleeve substrate are further improved, the hardness, the wear resistance and the corrosion resistance of the lining molten coating are improved, and the subzero treatment temperature is as follows: 196 ℃ below zero, time: for 20 hours.
(e) Stress relief tempering: the internal stress of the reinforced cylinder sleeve is further eliminated through destressing tempering, the mechanical property is further improved, and the destressing tempering temperature is as follows: 180 ℃, heat preservation time: for 5 hours.
(f) Post finish machining of the cylinder sleeve: the technical requirements on size and precision and assembly conditions specified in cylinder sleeve drawings are met through turning, grinding and polishing processes.
Example 2: the cylinder sleeve comprises a cylinder sleeve base body 1, a melt-coating and cryogenic treatment integrated reinforced liner melt-coating layer 2 and a metallurgical bonding interface layer 3 formed between the cylinder sleeve base body 1 and the liner melt-coating layer 2 through melt-coating reinforcement, wherein the cylinder sleeve base body 1 is medium carbon steel, and the melt-coating and cryogenic treatment integrated reinforced liner melt-coating layer 2 consists of a melt-coating metal bottom layer 4 and a melt-coating metal ceramic working layer 5, as shown in the attached drawing 1.
Further, the thickness of the inner lining fusion coating layer 2 is 1.5mm, the thickness of the metal bottom layer 4 is 0.2mm, and the thickness of the metal ceramic working layer 5 is 1.3 mm.
Further, the thickness of the interface layer 3 is between 5um and 20um, a transition layer which is formed by the lining metal bottom layer 4 and the cylinder sleeve base body 1 through a melting coating process and mainly combined through metallurgy is formed, and the binding force reaches 300 to 500 MPa.
Further, the metal bottom layer 4: the powder is made of nickel-based self-fluxing alloy powder, the metal ceramic working layer 5 is made of metal ceramic composite powder consisting of the nickel-based self-fluxing alloy powder, tungsten carbide and nitride, the mass content of the tungsten carbide is 20-50%, the nitride consists of one or more transition metal nitrides, the total mass content of the nitride is 0.5-10%, and the balance is the nickel-based self-fluxing alloy powder.
Further, the melt coating-deep cooling integrated strengthening process step mainly comprises the processes of cylinder liner base body pre-processing (a) → lining coating pre-preparation (b) → remelting treatment (c) → deep cooling treatment (d) → stress removal tempering (e) → post-cylinder liner finishing (f) and the like, as shown in fig. 2:
(a) pre-processing a cylinder sleeve substrate: the inner hole of the cylinder sleeve base body is machined to reach the size required by the thickness of a liner molten coating to be reinforced, and machining allowances are reserved at other machining parts so as to ensure the size and the precision of the cylinder sleeve guaranteed by subsequent finish machining.
(b) Pre-preparing a lining coating: the method comprises the following steps of obtaining a lining fused coating with specified components, a specified structure and a specified thickness according to the sequence of a metal bottom layer and a metal ceramic working layer by thermal spraying processes such as flame spraying, supersonic flame spraying, plasma spraying and the like; the pressure of oxygen and acetylene is 0.45-0.5 MPa and 0.08-0.1 MPa respectively, the flow rate is 960-1020L/min and 900-960L/min respectively, and the powder feeding flow rate is as follows: 81 g/min, spray distance: 190 mm.
(c) Remelting treatment: remelting the cylinder sleeve in a vacuum heating and sintering mode to obtain a compact interface layer for realizing interface metallurgical bonding, wherein the vacuum induction heating remelting temperature is as follows: 1035. + -. 5 ℃.
(d) Cryogenic treatment: placing the cylinder sleeve subjected to remelting treatment in liquid nitrogen for cryogenic treatment, so that the crystal structures and mechanical properties of the interface layer and the cylinder sleeve substrate are further improved, and the hardness, wear resistance and corrosion resistance of the lining molten coating are improved; the subzero treatment temperature is as follows: 196 ℃ below zero, time: for 20 hours.
(e) Stress relief tempering: the internal stress of the reinforced cylinder sleeve is further eliminated through stress relief tempering, and the mechanical property of the cylinder sleeve is further improved; stress relief tempering temperature: 180 ℃, heat preservation time: for 5 hours.
(f) Post finish machining of the cylinder sleeve: the technical requirements on size and precision and assembly conditions specified in cylinder sleeve drawings are met through turning, grinding and polishing processes.
The above disclosure is only for two specific embodiments of the present invention, however, the present invention is not limited thereto, and any variations that can be considered by those skilled in the art are intended to fall within the scope of the present invention.
Claims (2)
1. The cylinder sleeve is characterized by comprising a cylinder sleeve base body, a melt-coating and cryogenic treatment integrated reinforced lining melt coating layer and a metallurgical bonding interface layer formed between the cylinder sleeve base body and the lining melt coating layer through melt-coating reinforcement, wherein the melt-coating and cryogenic treatment integrated reinforced lining melt coating layer consists of a melt-coated metal bottom layer and a melt-coated metal ceramic working layer.
2. The cylinder sleeve of the melt-coating and cryogenic treatment integrated reinforced slurry pump of claim 1, wherein a cylinder sleeve base body is made of medium carbon steel, the thickness of the lining melt-coating layer is 0.5-2 mm, the thickness of a metal bottom layer is 0.05-0.2 mm, and the thickness of a metal ceramic working layer meets the requirement of the total thickness of the lining melt-coating layer; the thickness of the interface layer is between 5 and 20 microns, the interface layer is a transition layer which is formed by a metal bottom layer and a cylinder sleeve substrate through a melt coating process and mainly combined through metallurgy, and the binding force of the transition layer is 300 to 500 Mpa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020913523.6U CN212293720U (en) | 2020-05-27 | 2020-05-27 | Melt and scribble-cryogenic treatment integration and strengthen slurry pump cylinder sleeve |
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| CN202020913523.6U CN212293720U (en) | 2020-05-27 | 2020-05-27 | Melt and scribble-cryogenic treatment integration and strengthen slurry pump cylinder sleeve |
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