CN107130204A - A kind of wear-resistant coating cylinder jacket and its preparation technology - Google Patents

A kind of wear-resistant coating cylinder jacket and its preparation technology Download PDF

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Publication number
CN107130204A
CN107130204A CN201710373347.4A CN201710373347A CN107130204A CN 107130204 A CN107130204 A CN 107130204A CN 201710373347 A CN201710373347 A CN 201710373347A CN 107130204 A CN107130204 A CN 107130204A
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CN
China
Prior art keywords
cylinder jacket
coating
wear
resistant coating
nickel tungsten
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Pending
Application number
CN201710373347.4A
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Chinese (zh)
Inventor
王中营
王海军
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GKN Zhongyuan Cylinder Liner Co Ltd
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GKN Zhongyuan Cylinder Liner Co Ltd
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Priority to CN201710373347.4A priority Critical patent/CN107130204A/en
Publication of CN107130204A publication Critical patent/CN107130204A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134Plasma spraying
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06Metallic material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/004Cylinder liners

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The present invention relates to cylinder jacket field, more particularly to a kind of wear-resistant coating cylinder jacket and its preparation technology.A kind of wear-resistant coating cylinder jacket that the present invention is provided, including cylinder jacket matrix and the coating for being compounded in cylinder jacket base inner surface, the coating are nickel tungsten carbide coating, and the porosity of nickel tungsten carbide coating is 3 ~ 8%;Wear-resistant coating cylinder jacket prepared by the technique that the present invention is provided, small with coefficient of friction, coating is high with cylinder jacket inner bore surface bond strength, the advantages of corrosion-resistant, while the porosity of coating has good oil storage function again, can further reduce the abrasion of cylinder jacket.

Description

A kind of wear-resistant coating cylinder jacket and its preparation technology
Technical field
The present invention relates to cylinder jacket field, more particularly to a kind of wear-resistant coating cylinder jacket and its preparation technology.
Background technology
The life-span of cylinder jacket is the important indicator in measured engine life-span, and its inner surface is directly made by high-temperature high-pressure fuel gas With, and occurring high-speed slide friction with piston ring and piston skirt all the time, working environment is very severe;And bear HTHP and The reciprocating friction of piston ring, cylinder jacket is also easy to produce abrasive wear, melts abrasion and corrosive wear.To meet work requirements, Cylinder jacket should have enough intensity, rigidity and heat resistance, while should also have preferable anti-wear performance.
Present engine generally uses EGR exhaust recycling technology to improve discharge performance, but is applying The oxynitrides that engine is produced in journey is combined with water can generate acidic materials, and these acidic materials enter meeting inside cylinder jacket Corrode cylinder liner internal wall, serious corrosive wear can be caused, the performance in life-span and engine to cylinder jacket, which is produced, to be had a strong impact on. Surface coating processing, especially thermal spraying are to improve cylinder jacket wearability, corrosion proof important means.
Thermal spraying refers to using special equipment solid materials melted, its atomized spray is being sprayed rapidly by high velocity air On workpiece surface, a kind of metal surface processing method of sprayed coating is formed;One kind that plasma spraying belongs in plasma spray technology, It is to send into dusty material in plasma or in plasma jet, powder particle accelerated wherein, melted or part is molten After change, in the presence of impulsive force, sprawled in substrate and solidify to form synusia, and then pass through the one of synusia lamination formation coating Class processing technology.It has production efficiency high, and the coating quality of preparation is good, and the material ranges of spraying are wide, low cost and other advantages. It is that the direction that we study, especially nickel tungsten carbide are applied that cylinder-barrel surface application plasma spraying technology, which sprays one layer of anti-corrosion layer, Layer, its hardness is small with coefficient of friction up to 800~1400HV0.1, and the advantages of corrosion-resistant, and the porosity of coating has Good oil storage function, can further reduce the abrasion of cylinder sleeve again.
The content of the invention
The purpose of the present invention is that there is provided a kind of wear-resistant coating cylinder jacket and its preparation the problem of being directed to current cylinder liner abrasion Technique, improves the wearability and lubricant effect of cylinder jacket inner bore surface, and then reduces the abrasion of cylinder jacket.
To solve above technical problem, the technical solution adopted by the present invention is:
A kind of wear-resistant coating cylinder jacket, including cylinder jacket matrix and the coating for being compounded in cylinder jacket base inner surface, it is described Coating is nickel tungsten carbide coating, and the porosity of nickel tungsten carbide coating is 3~8%.
The nickel tungsten carbide coating thickness is 0.2~0.4mm.
Nickel tungsten-carbide powder for preparing nickel tungsten carbide coating, the mass percent of nickel is 75~95%, tungsten carbide Mass percent is 5~25%.
The granularity of the nickel tungsten-carbide powder is 40 μm~90 μm.
The bond strength of the coating and cylinder jacket base inner surface is more than 50Mpa.
The roughness Rz of the cylinder jacket base inner surface is 12~25 μm, and the roughness Rz of the coating is 60~100 μ m。
A kind of preparation technology of wear-resistant coating cylinder jacket, comprises the following steps:
1) cylinder jacket is put into alcohol, is cleaned by ultrasonic 5-10min, subsequent oven for drying;
2) the cylinder jacket outer surface after drying is applied into heat resistant adhesive tape, bead is then carried out to it, processing time is 3 ~10min;
3) the pre-heat treatment is carried out before spraying to bore area, preheating temperature is 60~100 DEG C, right after the pre-heat treatment terminates Cylinder jacket base inner surface is sprayed, cylinder jacket rotary speed be 30~70r/min, spray gun translational speed be 200~ 300mm/min, powder sending quantity is 30~50g/min, reciprocal 2~10 times of spray gun;
4) after spraying terminates, half microhoning is carried out to interior surface of cylinder liner and microhoning is processed, finished product is obtained.
The method of the spraying is plasma spraying.
Half microhoning is to hole size 0.03~0.07mm smaller than finished product hole size.
The beneficial effects of the invention are as follows:The wear-resistant coating cylinder jacket prepared by above-mentioned technique, its coating is nickel tungsten carbide, It is small with coefficient of friction, the advantages of corrosion-resistant;The porosity of coating has good oil storage function again simultaneously, can further reduce The abrasion of cylinder jacket.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Embodiment
The embodiment of the present invention is elaborated below in conjunction with accompanying drawing.
The invention provides a kind of wear-resistant coating cylinder jacket, as shown in figure 1, the wear-resistant coating cylinder jacket includes cylinder jacket base Body 1 and the coating 2 for being compounded in cylinder jacket base inner surface, after interior surface of cylinder liner spraying, can form relatively low surface roughness, Hydrodynamiclubrication is advantageously formed, the abrasion of cylinder jacket is reduced;In order to ensure that there is preferable interface to tie for coating and cylinder jacket matrix Conjunction property, the coating material of spraying need to be close from thermal coefficient of expansion with sprayed base material.
In the present invention, coating 2 is from being nickel tungsten carbide coating, and the nickel tungsten carbide coating thickness is 0.2~0.4mm; In nickel tungsten-carbide powder for preparing nickel tungsten carbide coating, the mass percent of nickel is 75~95%, the quality hundred of tungsten carbide Divide than being 5~25%, add has micro aluminium in one embodiment of the invention, in nickel tungsten-carbide powder;The nickel carbonization The granularity of tungsten powder is 40 μm~90 μm;The bond strength of the coating and cylinder jacket base inner surface is more than 50Mpa;It is described to apply The porosity of layer is 3~8%;The roughness Rz of the cylinder jacket base inner surface is 12~25 μm, the roughness of the coating Rz is 60~100 μm.
Cylinder jacket spraying before processing technology for semi-finished product process and fine turning outer circle, spraying plating pottery before, cylinder jacket it is cylindrical Size is final finished size, therefore, cylinder jacket need to be protected cylindrical during spray process, is sticky deposited in frequently with heat resistant adhesive tape cylindrical On, it is protected.
In the present invention, the method to the spraying of cylinder jacket base inner surface uses plasma spraying.After cylinder jacket spraying, Low surface roughness is easily formed, hydrodynamiclubrication is advantageously formed, wearability is improved;And in order that coating is obtained with cylinder liner internal wall Higher bond strength, sprayed on material often from thermal coefficient of expansion and sprays the material that the thermal coefficient of expansion of base material is close, In the present invention, from nickel tungsten carbide as coating material, its hardness is small with coefficient of friction up to 800~1400HV0.1, resistance to The advantages of corrosion, and the porosity of coating has good oil storage function, can further reduce the abrasion of cylinder jacket.
Embodiment 1
As shown in figure 1, a kind of wear-resistant coating cylinder jacket, including cylinder jacket matrix 1 and it is compounded in cylinder jacket base inner surface Coating 2, the coating 2 be nickel tungsten carbide coating;In the present embodiment, ten points are taken to the different parts of nickel tungsten carbide coating Measurement, and its average value is calculated, measurement result is as shown in table 1.
In the embodiment, in the nickel tungsten-carbide powder for preparing nickel tungsten carbide coating, the mass percent of nickel is 75%, carbonization The mass percent of tungsten is 25%, and the granularity of the nickel tungsten-carbide powder is 40 μm;The porosity of the coating is 3~8%; Before being sprayed to cylinder jacket, the roughness Rz of cylinder jacket base inner surface is 12 μm, after spray treatment, to coating access point testing And its average value is taken, roughness Rz is measured for 81.1 μm, while to the bond strength of the coating and cylinder jacket base inner surface Value is measured, and measures its collected values of bond strength for 93Mpa.
The coat thickness detection (μm) of table 1
The preparation technology of above-mentioned wear-resistant coating cylinder jacket, comprises the following steps:
1) cylinder jacket is put into alcohol, is cleaned by ultrasonic 10min, remove greasy dirt and the attachment of cylinder jacket base inner surface Thing, subsequent oven for drying;
2) the cylinder jacket outer surface after drying is applied into heat resistant adhesive tape, bead then is carried out to it, processing time is 5min;
3) the pre-heat treatment is carried out to bore area before spraying, preheating temperature is 60 DEG C, after the pre-heat treatment terminates, to cylinder jacket Base inner surface is sprayed, and cylinder jacket rotary speed is 50r/min, and spray gun translational speed is 220mm/min, and powder sending quantity is 30g/min, reciprocal 4 times of spray gun;
4) after spraying terminates, half microhoning is carried out to interior surface of cylinder liner and microhoning is processed, finished product is obtained.
The method of the spraying is plasma spraying.
Half microhoning is to hole size 0.03~0.07mm smaller than finished product hole size.
In the preparation technology, before spraying, cylinder cover inner hole 0.15~0.5mm bigger than finished product endoporus;After spraying terminates, to gas Inner surface of cylinder liner carries out half microhoning, and half microhoning is machined to hole size 0.04mm smaller than finished product hole size, then carries out Microhoning is machined to finished size.
Embodiment 2
As shown in figure 1, a kind of wear-resistant coating cylinder jacket, including cylinder jacket matrix 1 and it is compounded in cylinder jacket base inner surface Coating 2, the coating 2 be nickel tungsten carbide coating;In the present embodiment, after plasma spraying, in cylinder jacket base inner surface Nickel tungsten carbide coating is formed, coating layer thickness average value is 305 μm, and is used for the nickel tungsten-carbide powder for preparing nickel tungsten carbide coating In, the mass percent of nickel is 80%~95%, and the mass percent of tungsten carbide is 5%~20%;In the present embodiment, nickel carbonization Micro aluminium is additionally added in tungsten powder, the outer surface of nickel is coated on, the granularity of the nickel tungsten-carbide powder is 65 μm;It is described to apply The porosity of layer is 5%;Before the cylinder jacket is sprayed, the roughness Rz of cylinder jacket base inner surface is 12 μm, after spraying, The roughness of the coating is that Rz is 79.2 μm, and the collected values of bond strength of the coating and cylinder jacket base inner surface is 88.8Mpa.
The preparation technology of above-mentioned wear-resistant coating cylinder jacket, comprises the following steps:
1) cylinder jacket is put into alcohol, is cleaned by ultrasonic 20min, remove greasy dirt and the attachment of cylinder jacket base inner surface Thing, subsequent oven for drying;If the removal effect of greasy dirt and attachment is not good, ultrasound can be carried out using alcohol and propyl alcohol successively Ripple cleans 10~20min, it should be noted that propyl alcohol steam can produce minimal irritation, harmful to human to eyes, nose and throat Health, should be noted that protection during operation.
2) the cylinder jacket outer surface after drying is applied into heat resistant adhesive tape, bead then is carried out to it, processing time is 8min;
3) the pre-heat treatment is carried out to bore area before spraying, preheating temperature is 80 DEG C, after the pre-heat treatment terminates, to cylinder jacket Base inner surface is sprayed, and cylinder jacket rotary speed is 60r/min, and spray gun translational speed is 260mm/min, and powder sending quantity is 40g/min, reciprocal 4 times of spray gun;
4) after spraying terminates, half microhoning is carried out to interior surface of cylinder liner and microhoning is processed, finished product is obtained.
In the present embodiment, the method to the spraying of cylinder jacket base inner surface uses plasma spraying.
In the preparation technology, before spraying, cylinder cover inner hole 0.3mm bigger than finished product endoporus;After spraying terminates, in cylinder jacket Surface carries out half microhoning, and half microhoning is machined to hole size 0.04mm smaller than finished product hole size, then carries out microhoning It is machined to finished size.
Embodiment 3
As shown in figure 1, a kind of wear-resistant coating cylinder jacket, including cylinder jacket matrix 1 and it is compounded in cylinder jacket base inner surface Coating 2, the coating 2 be nickel tungsten carbide coating;In the present embodiment, after plasma spraying, in cylinder jacket base inner surface Nickel tungsten carbide coating is formed, coating layer thickness is 0.45mm, and be used to preparing in the nickel tungsten-carbide powder of nickel tungsten carbide coating, nickel Mass percent is 85%~92%, during the mass percent of tungsten carbide is 8%~15%, the present embodiment, nickel tungsten-carbide powder In be additionally added micro aluminium, be coated on the outer surface of nickel;The granularity of the nickel tungsten-carbide powder is 70~85 μm;The coating Porosity be 6%~8%;Before the cylinder jacket is sprayed, the roughness Rz of cylinder jacket base inner surface is 20 μm, spraying Afterwards, the roughness of the coating is that Rz is 84.3 μm, and the collected values of bond strength of the coating and cylinder jacket base inner surface is 81.6Mpa;
The preparation technology of above-mentioned wear-resistant coating cylinder jacket, comprises the following steps:
1) cylinder jacket is put into alcohol, is cleaned by ultrasonic 25min, remove greasy dirt and the attachment of cylinder jacket base inner surface Thing, subsequent oven for drying;If the removal effect of greasy dirt and attachment is not good, ultrasound can be carried out using alcohol and propyl alcohol successively Ripple cleans 5~30min, it should be noted that propyl alcohol steam can produce minimal irritation to eyes, nose and throat, and harmful to human is good for Health, should be noted that protection during operation.
2) the cylinder jacket outer surface after drying is applied into heat resistant adhesive tape, bead is then carried out to it, processing time is 8 ~10min;
3) the pre-heat treatment is carried out to bore area before spraying, preheating temperature is 85-95 DEG C, after the pre-heat treatment terminates, to gas Cylinder sleeve base inner surface is sprayed, and cylinder jacket rotary speed is 65~70r/min, and spray gun translational speed is 260~300mm/ Min, powder sending quantity is 40~50g/min, reciprocal 8~10 times of spray gun;
4) after spraying terminates, half microhoning is carried out to interior surface of cylinder liner and microhoning is processed, finished product is obtained.
In the present embodiment, the method to the spraying of cylinder jacket base inner surface uses plasma spraying.
In the preparation technology, before spraying, cylinder cover inner hole 0.2~0.4mm bigger than finished product endoporus;After spraying terminates, to gas Inner surface of cylinder liner carries out half microhoning, and half microhoning is machined to hole size 0.04~0.07mm smaller than finished product hole size, with Microhoning processing is carried out afterwards until finished size.
There is internally coated cylinder jacket, on the one hand the coating set up may be used made from the preparation technology provided using the present invention To improve the wearability of interior surface of cylinder liner, the service life of effective lifting cylinder set, on the other hand, cylinder jacket coating 3%~ 8% hole can store fuel oil well, advantageously form hydrodynamiclubrication, reduce the abrasion of cylinder jacket.
Above example is only used to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair It is bright to be described in detail, it will be understood by those within the art that:Still the present invention can be modified or be waited With replacement, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention Among sharp claimed range.
In the description of the invention, it is to be understood that the orientation or position relationship of the instruction such as term "front", "rear" are base Only it is to be described for ease of the description present invention with simplified, rather than indicate or infer institute in orientation shown in the drawings or position relationship The device or element of finger must have specific orientation, be specific azimuth configuration and operation, thus it is not intended that to this hair The limitation of bright protection content.

Claims (9)

1. a kind of wear-resistant coating cylinder jacket, including cylinder jacket matrix and the coating for being compounded in cylinder jacket base inner surface, its feature It is:The coating is nickel tungsten carbide coating, and the porosity of nickel tungsten carbide coating is 3 ~ 8%.
2. a kind of wear-resistant coating cylinder jacket according to claim 1, it is characterised in that:The nickel tungsten carbide coating thickness is 0.2~0.4mm。
3. a kind of wear-resistant coating cylinder jacket according to claim 1, it is characterised in that:For preparing nickel tungsten carbide coating Nickel tungsten-carbide powder, the mass percent of nickel is 75 ~ 95%, and the mass percent of tungsten carbide is 5 ~ 25%.
4. a kind of wear-resistant coating cylinder jacket according to claim 3, it is characterised in that:The granularity of the nickel tungsten-carbide powder For 40 μm ~ 90 μm.
5. according to a kind of any described wear-resistant coating cylinder jacket of Claims 1-4, it is characterised in that:The coating and cylinder The bond strength for covering base inner surface is more than 50Mpa.
6. according to a kind of any described wear-resistant coating cylinder jacket of claim 1 to 5, it is characterised in that:The cylinder jacket matrix The roughness Rz of inner surface is 12 ~ 25 μm, and the roughness Rz of the coating is 60 ~ 100 μm.
7. a kind of preparation technology of wear-resistant coating cylinder jacket, comprises the following steps:
1)Cylinder jacket is put into alcohol, is cleaned by ultrasonic 5 ~ 30min, subsequent oven for drying;
2)Cylinder jacket outer surface after drying is applied into heat resistant adhesive tape, bead is then carried out to it, processing time is 3 ~ 10min;
3)The pre-heat treatment is carried out to bore area before spraying, preheating temperature is 60 ~ 100 DEG C, after the pre-heat treatment terminates, to cylinder jacket Base inner surface carry out nickel tungsten carbide coating spraying, cylinder jacket rotary speed be 30 ~ 70r/min, spray gun translational speed be 200 ~ 300mm/min, powder sending quantity is 30 ~ 50g/min, reciprocal 2 ~ 10 times of spray gun;
4)After spraying terminates, half microhoning is carried out to interior surface of cylinder liner and microhoning is processed, finished product is obtained.
8. a kind of preparation technology of wear-resistant coating cylinder jacket according to claim 7, it is characterised in that:The side of the spraying Method is plasma spraying.
9. a kind of preparation technology of wear-resistant coating cylinder jacket according to claim 7 or 8, it is characterised in that:Half essence Honing is to hole size 0.03 ~ 0.07mm smaller than finished product hole size.
CN201710373347.4A 2017-05-22 2017-05-22 A kind of wear-resistant coating cylinder jacket and its preparation technology Pending CN107130204A (en)

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CN108486524A (en) * 2018-06-13 2018-09-04 中原内配集团安徽有限责任公司 A kind of preparation process of wear-resistant coating cylinder jacket
CN108796249A (en) * 2018-06-13 2018-11-13 中原内配集团安徽有限责任公司 A kind of local granule Enhancement Method of aluminum alloy cylinder sleeve
CN112502845A (en) * 2020-11-30 2021-03-16 安庆帝伯格茨缸套有限公司 Inner circle three-section type high-wear-resistance air-tightness cylinder sleeve
CN113431695A (en) * 2021-07-30 2021-09-24 中原内配集团股份有限公司 Cylinder sleeve, engine and cylinder sleeve processing method

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Publication number Priority date Publication date Assignee Title
CN108486524A (en) * 2018-06-13 2018-09-04 中原内配集团安徽有限责任公司 A kind of preparation process of wear-resistant coating cylinder jacket
CN108796249A (en) * 2018-06-13 2018-11-13 中原内配集团安徽有限责任公司 A kind of local granule Enhancement Method of aluminum alloy cylinder sleeve
CN112502845A (en) * 2020-11-30 2021-03-16 安庆帝伯格茨缸套有限公司 Inner circle three-section type high-wear-resistance air-tightness cylinder sleeve
CN113431695A (en) * 2021-07-30 2021-09-24 中原内配集团股份有限公司 Cylinder sleeve, engine and cylinder sleeve processing method

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