CN106319421A - Preparation method for abrasion and corrosion resistant coating layer for aircraft undercarriage - Google Patents
Preparation method for abrasion and corrosion resistant coating layer for aircraft undercarriage Download PDFInfo
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- CN106319421A CN106319421A CN201510348564.9A CN201510348564A CN106319421A CN 106319421 A CN106319421 A CN 106319421A CN 201510348564 A CN201510348564 A CN 201510348564A CN 106319421 A CN106319421 A CN 106319421A
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Abstract
A preparation method for an abrasion and corrosion resistant coating layer for an aircraft undercarriage comprises the following steps: drying a spraying powder; quenching aircraft undercarriage material 300M steel at the temperature of 860 DEG C+/-20 DEG C, with the heat preservation time of 60 min+/-10 min and via oil cooling, followed by carrying out air cooling at the temperature of 310 DEG C+/-10 DEG C with the heat preservation time of 2 h, and tempering for two times; pre-heating the surface of a substrate after pretreatment and sandblasting treatment by an active combustion hypersonic flame spraying technology, spraying with a WC-10Co4Cr powder, and forming a coating layer having abrasion and corrosion resistant performance; and carrying out heat treatment of the coating layer prepared by the active combustion hypersonic flame spraying technology in a 800-1100 DEG C vacuum sintering furnace and with the heat preservation time of 60-90 min, to further improve the bonding strength of the coating layer and the substrate. The spraying process is simple, can be applied to a large number of spraying powders and corresponding workpieces, and is flexible to operate.
Description
Technical field
The present invention relates to the parts coating technology fields such as undercarriage piston rod, be specifically related to a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating
Spraying method
Background technology
Undercarriage is the critical component of aircraft, plays load-bearing, buffers, sliding runs the effect such as sliding brake function and manipulation in aircraft.Statistics display, 70%
Above space shuttle accident, the when of being all to occur at taking off and land.The complexity of undercarriage high strength steel Service Environment, except
Bear outside the biggest load and strong impact, serious fretting wear and corrosion must also be born, these problems had a strong impact on aircraft reliability,
Safety and life-span, often need its surface is coated to process, to improve the special performance such as wear-resisting, anti-corrosion of part.
Traditional undercarriage surfacecti proteon uses electroplating surface hard chrome to process, but owing to it is a kind of high pollution, non-green technology, and coating makes
Find its wear-resisting, poor corrosion resistance during with, there is hydrogen embrittlement risk, reduce the fatigue behaviour of undercarriage material, it is impossible to meet civil aircraft
To high-performance, environment friendly coated coating technology requirement.
At present, use HVAF technology (HVOF) to prepare tungsten carbide-base coating replacing electroplating hard chrome to undercarriage titanium alloy and to surpass
The surfacecti proteon of high strength steel becomes the focus of research.But in HVAF technology (HVOF) sprayed wc base coating procedure, mistake
High temperature and oxidizing atmosphere can cause the oxidation of WC particle and decarburization to be decomposed, and often occur WO in coatingX, W2C, simple substance W and Co6W6C
Deng decarburization product, seriously reduce the performances such as the hardness of coating, wearability, bond strength.
Therefore, for undercarriage parts, need a kind of novel spraying method to improve spraying particle velocity while reducing spraying flame temperature,
Thus obtain the undercarriage abrasion-proof corrosion-proof erosion resisting coating of high-performance, low cost.
Summary of the invention
It is an object of the invention to overcome existing HVAF technology to prepare the decarburization of undercarriage coating and wear-corrosion resistance is poor
Etc. problem, it is provided that the spraying method of a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating, having production cost low, and coating hardness is high, porosity is low
Etc. feature.
The preparation method of the present invention a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating, uses activated combustion HVAF technology (AC-HVAF)
Pretreated undercarriage 300M steel is sprayed, the WC-10Co4Cr coating of preparation is carried out heat treatment, specifically includes following step:
Step 1: powder pre-treating
The WC-10Co4Cr powder that particle size distribution is 15-30 μm is dried 4-6 hour in the baking oven of 60-80 DEG C.
Step 2: Landing Gear Materials For Aircraft (300M steel) pretreatment
300M steel curved beam is quenched at 865 DEG C ± 10 DEG C；300M steel curved beam after quenching is carried out 2 tempering at 310 DEG C ± 10 DEG C.
Subsequently specimen surface acetone oil removing is cleaned, use No. 24 white fused alumina sand to carry out blasting treatment with the pressure of 0.3 ± 0.02MPa.
Step 3: activated combustion HVAF technology (AC-HVAF) prepares coating
Use activated combustion HVAF (AC-HVAF) to the Landing Gear Materials For Aircraft (300M after blasting treatment under conditions of not powder feeding
Steel) surface spraying a time preheats, and makes 300M steel curved beam temperature reach 100 ± 10 DEG C.After substrate preheating, open powder feeding, by WC-10Co4Cr
After powder particle surface is melted, spray deposited Landing Gear Materials For Aircraft (300M steel) surface after preheating, often spraying passage is 15-20 μ m-thick,
Form the coating with wear-corrosion resistance.In spraying process, the sample back side uses compressed air to cool down, and controls substrate temperature at 180 DEG C
Below.
Step 4: coating post processing
The coating preparing activated combustion HVAF technology (AC-HVAF) carries out heat treatment in 800-1100 DEG C of vacuum sintering furnace.
The preparation method of the present invention a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating, carries out 860 DEG C ± 20 DEG C to Landing Gear Materials For Aircraft 300M steel,
Temperature retention time 60min ± 10min, the quenching that oil is cold,
The preparation method of the present invention a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating, is carried out the Landing Gear Materials For Aircraft 300M steel curved beam after quenching
310 DEG C ± 10 DEG C, temperature retention time 2h, air cools down, is tempered twice.
The preparation method of the present invention a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating, activated combustion HVAF (AC-HVAF) propane stream
Amount is 65～100L/min, and propane pressure is 0.6-0.8MP；Air mass flow is 300～350L/min, and air pressure is 0.6-0.7MP；Spray distance
For 180-240mm；Powder feeding rate is 40-80g/min；Spray gun translational speed is 0.5-2m/s.
The preparation method of the present invention a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating, activated combustion HVAF technology (AC-HVAF) is made
Standby undercarriage coating layer thickness is 100-150 μm.
The preparation method of the present invention a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating, to activated combustion HVAF technology (AC-HVAF)
The coating heat treatment temperature of preparation is 800-1100 DEG C, temperature retention time 60-90min.
The present invention the most relatively, has the advantage that
1, a kind of novel active burning HVAF technology, it is achieved that spraying flame stream temperature is low and powder particle flight speed fast, during spraying
Particle rapidity more than 700m/s, reduce the powder time of staying and powder in flame and melt grain and ambient atmosphere time, thus suppression is in spraying
During the decomposition of dusty spray, decarburization and oxidation, do not have layer structure to occur.Improve the stress state between coating and workpiece, can significantly carry
High coating and the bond strength of workpiece.
2, in the present invention, powder pre-treating before spraying and the spraying operation such as workpiece early stage heat treatment improve the wettability of coating and workpiece, can be significantly
Improve the binding ability of coating and workpiece.
3, the coating preparing activated combustion HVAF technology (AC-HVAF) carries out heat treatment, can eliminate the amorphous phase in coating,
Reduce the residual stress in coating, improve hardness and the wearability of coating.
4, spraying coating process of the present invention is simple, is applicable to a large amount of dusty spray and associated workpiece, flexible operation.
Accompanying drawing explanation
The coating that accompanying drawing 1 is prepared for the embodiment of the present invention and matrix bonding state picture.
Detailed description of the invention
Below in conjunction with the accompanying drawings and detailed description of the invention, the preparation method of undercarriage abrasion-proof corrosion-proof erosion resisting coating of the present invention is further described.
Undercarriage 300M steel selected by the matrix material selected.First, 300M steel is incubated under the conditions of 865 DEG C 60min in vacuum drying oven
After, by the cold quick cooling of oil；Again the 300M steel through quenching is put into after vacuum drying oven is incubated 120min under the conditions of 310 DEG C, cold with air
But to room temperature, identical tempering process is carried out twice.The acetone oil removing of its surface, after quenching and double tempering, is cleaned, and is adopted by 300 steel curved beam
Blasting treatment is carried out with the pressure of 0.3MPa with No. 24 white fused alumina sand.Using particle size distribution is that the WC-10Co4Cr powder of 15-30 μm is as spray
It is coated with powder, before spraying, powder is dried in the baking oven of 80 DEG C 4, hour, then use activated combustion HVAF technology (AC-HVAF)
WC-10Co4Cr powder is sprayed.After spray gun igniting, to the Landing Gear Materials For Aircraft (300M after blasting treatment under conditions of not powder feeding
Steel) surface spraying a time preheats, and makes 300M steel curved beam temperature reach about 100 DEG C.After substrate preheating, start powder feeding spraying, will
After WC-10Co4Cr powder particle surface is melted, spray deposited Landing Gear Materials For Aircraft (300M steel) surface after preheating, often spray passage
Control at 15-20 μ m-thick, to prevent stress excessive, affect the bond strength of coating.In spraying process, the sample back side uses compressed air to carry out cold
But, control substrate temperature below 180 DEG C, it is to avoid matrix burning, deteriorate its performance.Spraying parameter in spraying process, combustion gas propane
Flow is 80L/min, and pressure is 0.68MP；Air mass flow is 320L/min, and pressure is 0.65MP；Spray distance is 180-240mm, powder feeding
Speed is 55g/min, and the translational speed of spray gun is 1m/s, and the thickness of spray-on coating is 150 μm.The coating sample of spraying preparation, burns in vacuum
Carrying out heat treatment in freezing of a furnace, heat treatment temperature is 900 DEG C, and temperature retention time is 60min.Coating through Overheating Treatment is shown in attached with matrix bonding state
Fig. 1, carries out test to it and obtains, and the hardness of coating is up to 1347HV0.3, and porosity is 0.62%, and bond strength is 68MPa.
Claims (6)
1. the undercarriage preparation method of abrasion-proof corrosion-proof erosion resisting coating, it is characterised in that: comprise the steps:
Step 1: powder pre-treating
The WC-10Co4Cr powder that particle size distribution is 15-30 μm is dried 4-6 hour in the baking oven of 60-80 DEG C；
Step 2: Landing Gear Materials For Aircraft pretreatment
300M steel curved beam is quenched at 865 DEG C ± 10 DEG C；300M steel curved beam after quenching is carried out 2 tempering at 310 DEG C ± 10 DEG C.Subsequently specimen surface acetone oil removing is cleaned, use No. 24 white fused alumina sand to carry out blasting treatment with the pressure of 0.3 ± 0.02MPa；
Step 3: activated combustion HVAF technology prepares coating
Use activated combustion HVAF under conditions of not powder feeding, Landing Gear Materials For Aircraft (300M steel) the surface spraying a time after blasting treatment to be preheated, make 300M steel curved beam temperature reach 100 ± 10 DEG C.After substrate preheating, opening powder feeding, after melted for WC-10Co4Cr powder particle surface, spray deposited Landing Gear Materials For Aircraft (300M steel) surface after preheating, often spraying passage is 15-20 μ m-thick, forms the coating with wear-corrosion resistance；
In spraying process, the sample back side uses compressed air to cool down, and controls substrate temperature below 180 DEG C；
Step 4: coating post processing
The coating of preparation is carried out heat treatment in 800-1100 DEG C of vacuum sintering furnace.
The preparation method of a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating the most according to claim 1, it is characterised in that: Landing Gear Materials For Aircraft 300M steel is carried out 860 DEG C ± 20 DEG C, temperature retention time 60min ± 10min, the quenching that oil is cold.
The preparation method of a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating the most according to claim 1, it is characterised in that: the Landing Gear Materials For Aircraft 300M steel curved beam after quenching is carried out 310 DEG C ± 10 DEG C, and temperature retention time 2h, air cools down, is tempered twice.
The preparation method of a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating the most according to claim 1, it is characterised in that: activated combustion HVAF (AC-HVAF) propane flow is 65～100L/min, and propane pressure is 0.6-0.8MP；Air mass flow is 300～350L/min, and air pressure is 0.6-0.7MP；Spray distance is 180-240mm；Powder feeding rate is 40-80g/min；Spray gun translational speed is 0.5-2m/s.
The preparation method of a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating the most according to claim 1, it is characterised in that: undercarriage coating layer thickness prepared by activated combustion HVAF technology (AC-HVAF) is 100-150 μm.
The preparation method of a kind of undercarriage abrasion-proof corrosion-proof erosion resisting coating the most according to claim 1, it is characterized in that: the coating heat treatment temperature preparing activated combustion HVAF technology (AC-HVAF) is 800-1100 DEG C, temperature retention time 60-90min.
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| CN201510348564.9A CN106319421A (en) | 2015-06-23 | 2015-06-23 | Preparation method for abrasion and corrosion resistant coating layer for aircraft undercarriage |
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| CN201510348564.9A CN106319421A (en) | 2015-06-23 | 2015-06-23 | Preparation method for abrasion and corrosion resistant coating layer for aircraft undercarriage |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106702304A (en) * | 2017-01-22 | 2017-05-24 | 石家庄市藁城区北创刀具有限公司 | Preparation method of wear-resisting layers of tool special for green fodder |
| CN107460429A (en) * | 2017-06-14 | 2017-12-12 | 芜湖通潮精密机械股份有限公司 | A kind of plasma spray process |
| CN109055884A (en) * | 2018-08-17 | 2018-12-21 | 国营芜湖机械厂 | A kind of aircraft oil-receiving device reproducing method |
| CN109112465A (en) * | 2018-08-17 | 2019-01-01 | 国营芜湖机械厂 | A kind of novel undercarriage Shaft of Titanium Alloy remanufactures repair method |
| CN109371350A (en) * | 2018-10-19 | 2019-02-22 | 扬州大学 | A kind of micro- molten and compound method for preparing WC-12Co coating of supersonic flame spraying of laser |
| CN110331360A (en) * | 2019-08-22 | 2019-10-15 | 广东省新材料研究所 | Paper for daily use dandy roll and the preparation method and application thereof |
| CN110923608A (en) * | 2019-12-16 | 2020-03-27 | 安徽马钢表面技术股份有限公司 | Wear-resistant coating of sink roller shaft sleeve, preparation method and application |
| CN110983235A (en) * | 2019-12-31 | 2020-04-10 | 广东省新材料研究所 | Anilox roll and preparation method thereof |
| CN111979535A (en) * | 2020-07-22 | 2020-11-24 | 国营芜湖机械厂 | Cold spraying remanufacturing process for outer cylinder surface of undercarriage |
| CN114030264A (en) * | 2021-10-29 | 2022-02-11 | 丹阳丹金航空材料科技有限公司 | Preparation method of high-strength laminated composite board for airplane deicing |
| CN115161585A (en) * | 2022-07-29 | 2022-10-11 | 上海交通大学内蒙古研究院 | Preparation method of wear-resistant corrosion-resistant WC-10Co4Cr tungsten flash coating |
| CN115261763A (en) * | 2022-07-29 | 2022-11-01 | 上海交通大学内蒙古研究院 | Preparation method of flash tungsten coating on surface of roller |
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| CN106702304A (en) * | 2017-01-22 | 2017-05-24 | 石家庄市藁城区北创刀具有限公司 | Preparation method of wear-resisting layers of tool special for green fodder |
| CN107460429A (en) * | 2017-06-14 | 2017-12-12 | 芜湖通潮精密机械股份有限公司 | A kind of plasma spray process |
| CN107460429B (en) * | 2017-06-14 | 2019-05-03 | 芜湖通潮精密机械股份有限公司 | A kind of plasma spray process |
| CN109055884A (en) * | 2018-08-17 | 2018-12-21 | 国营芜湖机械厂 | A kind of aircraft oil-receiving device reproducing method |
| CN109112465A (en) * | 2018-08-17 | 2019-01-01 | 国营芜湖机械厂 | A kind of novel undercarriage Shaft of Titanium Alloy remanufactures repair method |
| CN109371350A (en) * | 2018-10-19 | 2019-02-22 | 扬州大学 | A kind of micro- molten and compound method for preparing WC-12Co coating of supersonic flame spraying of laser |
| CN110331360A (en) * | 2019-08-22 | 2019-10-15 | 广东省新材料研究所 | Paper for daily use dandy roll and the preparation method and application thereof |
| CN110923608B (en) * | 2019-12-16 | 2021-12-10 | 安徽马钢表面技术股份有限公司 | Wear-resistant coating of sink roller shaft sleeve, preparation method and application |
| CN110923608A (en) * | 2019-12-16 | 2020-03-27 | 安徽马钢表面技术股份有限公司 | Wear-resistant coating of sink roller shaft sleeve, preparation method and application |
| CN110983235A (en) * | 2019-12-31 | 2020-04-10 | 广东省新材料研究所 | Anilox roll and preparation method thereof |
| CN111979535A (en) * | 2020-07-22 | 2020-11-24 | 国营芜湖机械厂 | Cold spraying remanufacturing process for outer cylinder surface of undercarriage |
| CN114030264A (en) * | 2021-10-29 | 2022-02-11 | 丹阳丹金航空材料科技有限公司 | Preparation method of high-strength laminated composite board for airplane deicing |
| CN115161585A (en) * | 2022-07-29 | 2022-10-11 | 上海交通大学内蒙古研究院 | Preparation method of wear-resistant corrosion-resistant WC-10Co4Cr tungsten flash coating |
| CN115261763A (en) * | 2022-07-29 | 2022-11-01 | 上海交通大学内蒙古研究院 | Preparation method of flash tungsten coating on surface of roller |
| CN115161585B (en) * | 2022-07-29 | 2023-11-14 | 上海交通大学内蒙古研究院 | Preparation method of wear-resistant corrosion-resistant WC-10Co4Cr tungsten flash coating |
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