CN102154640B - Method for enhancing bonding strength of aluminum coating - Google Patents

Method for enhancing bonding strength of aluminum coating Download PDF

Info

Publication number
CN102154640B
CN102154640B CN2011100637158A CN201110063715A CN102154640B CN 102154640 B CN102154640 B CN 102154640B CN 2011100637158 A CN2011100637158 A CN 2011100637158A CN 201110063715 A CN201110063715 A CN 201110063715A CN 102154640 B CN102154640 B CN 102154640B
Authority
CN
China
Prior art keywords
powder
bonding strength
coating
aluminum coating
matrix
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011100637158A
Other languages
Chinese (zh)
Other versions
CN102154640A (en
Inventor
卜恒勇
卢晨
陈彬
李晓玲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Jiaotong University
Original Assignee
Shanghai Jiaotong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Jiaotong University filed Critical Shanghai Jiaotong University
Priority to CN2011100637158A priority Critical patent/CN102154640B/en
Publication of CN102154640A publication Critical patent/CN102154640A/en
Application granted granted Critical
Publication of CN102154640B publication Critical patent/CN102154640B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Other Surface Treatments For Metallic Materials (AREA)
  • Powder Metallurgy (AREA)

Abstract

The invention provides a method for enhancing bonding strength of an aluminum coating, which belongs to the technical field of metal surface treatment; the method comprises the following steps of: aluminium powder and Mg17Al12 spherical powder are mechanically mixed, and the mixed powder is sprayed on the surface of a substrate. In the method, a cold-spraying method is used for depositing the mixed powder of intermetallic compound powder and aluminium powder, and does not worsen other mechanical performances and chemical performances of the aluminum layer while increasing the bonding strength of the aluminium layer.

Description

The raising method of aluminum coating bonding strength
Technical field
What the present invention relates to is a kind of method of field of metal surface treatment technology, specifically is a kind of raising method of aluminum coating bonding strength.
Background technology
Aluminium and aluminum alloy materials have excellent mechanical property and corrosion resistance nature, therefore are widely used for communications and transportation, aerospace, 3 ℃ and military field etc.Except as the structured material, an important application of aluminium and aluminum alloy materials be as coating with the protection body material, expand the Application Areas and the service life that improves body material of body material.At present, the main preparation methods of aluminum coating has thermospray (plasma spraying and flame plating etc.), laser melting coating, vapour deposition and plating etc.Yet aluminium is one of more active metal of chemical property, and traditional deposition method makes aluminum coating in the preparation process, grain growth take place, defectives such as phase transformation inevitably; Perhaps sedimentation velocity is too slow, and deposition process power consumption is too high with contaminate environment etc.
Cold spraying is to be based upon a kind of new coating technology of preparing of rationally utilizing on the aerodynamic principle basis; It is mainly through high pressure gas powder quick particle; Particle high speed clashes into matrix and is deposited as coating through producing violent viscous deformation at matrix surface, and wherein the preheating temperature of working gas is generally less than 600 ℃, and pressure is 1-3.5MPa; The typical sizes of spraying particle is 5-50 μ m, and velocity of particle is 300-1200m/s.Adopt cold spray-coating method can prepare fine aluminium, duraluminum, aluminum composite and aluminium nano-material coating.Yet though the fine aluminium coating has corrosion resistance nature preferably, its bonding strength, surface hardness are all lower, have limited its further application; And in the starting material aluminium powder, add hard phase particles, like aluminum oxide, though ceramic particles such as silit can improve coating hardness and bonding strength, its corrosion resistance nature is along with the increase of ceramic particle content in the coating reduces gradually.Simultaneously, the ceramic phase particles of too high levels also can be destroyed coating and basal body interface in the coating, reduces coating and matrix at the interface bonding strength.
Retrieval through to prior art is found; Chinese patent document number CN101058881A has put down in writing a kind of " preparation method of intermetallic compound coating "; This invention adopts the mechanical alloying method to prepare raw material powder; The method of using cold spraying subsequently coating such as depositing Al/Ni and Al/Ti and 300-1200 ℃ of following thermal treatment on matrix, the alloying element in the coating at high temperature spreads, and forms intermetallic compound coating.It should be noted that needs in this prior art to use high-temperature heat treatment, though can improve Bond Strength of Coating to a certain extent, High temperature diffusion is handled can produce heat affecting to matrix metal inevitably.In addition, magnalium intermediate compound coating can not adopt and should technology prepare, because the character of magnesium powder is very active, is not suitable for as the cold spraying starting material.
Summary of the invention
The present invention is directed to the above-mentioned deficiency that prior art exists; A kind of raising method of aluminum coating bonding strength is provided; The mixed powder of compound powder and aluminium powder form between use cold spray-coating method metal refining; When improving the aluminum coating bonding strength, can not worsen other mechanical property and the chemical property of aluminum coating.
The present invention realizes that through following technical scheme the present invention passes through aluminium powder and Mg 17Al 12The spherical powder mechanically mixing, and with mixed powder cold spraying in matrix surface.
Described aluminium powder is massfraction greater than 99% and gets the aluminium powder particle of particle dia less than 45 μ m through screening;
Described Mg 17Al 12The average particle diameter of spherical powder is 58 μ m.
The ratio of described mechanically mixing is that atomic ratio is 25: 75～75: 25.
Described matrix surface is through acetone and dry.
Described matrix is the Al6061 duraluminum of T6 attitude or the AZ91D magnesiumalloy of as cast condition.
Described cold spraying is meant: adopt helium as working gas and particle carrier gas, the pressure and temperature of working gas in the spray gun ingress is respectively 0.98MPa and 300 ℃, and the pressure of carrier gas is 1.04MPa, and temperature is a room temperature; Powder feeding rate is controlled at about 15g/min, and the distance that exports to matrix surface of spray gun is 10-15mm and matrix with respect to the translational speed of spray gun is 1-3mm/s.
The present invention relates to the coating that aforesaid method obtains, its thickness of single pass deposition can reach 2369 ± 46 μ m, and porosity is lower than 0.2%, Mg 17Al 12Content in coating is 4.6 ± 2.8%, and coating hardness is 56.8 ± 4.2 (Hv100g), and the bonding strength of coating is 27.9 ± 3.6MPa (according to the EN15340 standard).
Compare with existing technology, advantage of the present invention is:
(1) staple of intermetallic compound is aluminium and magnesium, and magnesium is a kind of important alloying element in the duraluminum; The fusing point of this compound is lower than 660 ℃ simultaneously, so this intermetallic compound joins in the starting material aluminium powder form as a kind of hard phase particles, can not influence the easy recyclability of aluminium.
(2) this intermetallic compound is spherical, and hardness is higher, and is not yielding, and most of spheroidal particle rebounds from coatingsurface in deposition process, so its content in aluminum coating is very low, can not influence coating and matrix in combining at the interface.When this method improves the aluminum coating bonding strength, to the chemical property of aluminum coating, especially almost not influence of corrosion resistance nature.
(3) aluminum coating that obtains is fine and close more, because the compacting effect of hard phase particles does not almost have hole between the aluminum particulate, the coating that obtains not only density is high, and the sedimentation effect of aluminum particulate also makes moderate progress, and the coat-thickness that single pass obtains also increases.
(4) if the content of intermetallic compound powder in raw material powder is higher than a particular value, matrix surface just need not pass through sandblasting before spraying.
(5) intermetallic compound powder and aluminium powder form only need simple and mechanical mixing before the spraying, need under shielding gas, not carry out special processings such as ball milling, have simplified operation sequence, have practiced thrift the cost of preparation coating.
Description of drawings
Fig. 1 raw material powder particle morphology;
Wherein: (a) be aluminum particulate powder morphology figure, (b) Mg 17Al 12The particle powder shape appearance figure.
Fig. 2 cold spraying 50%Al+50%Mg 17Al 12Mixed powder coat cross section shape appearance figure.
Fig. 3 cold spraying 25%Al+75%Mg 17Al 12Mixed powder coat cross section shape appearance figure.
Embodiment
Elaborate in the face of embodiments of the invention down, present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Embodiment 1
The aluminium powder form of selecting is the rafifinal powder, and purity (massfraction) is greater than 99%, and irregular profile is got the particle of particle dia less than 45 μ m through screening; The magnalium intermetallic compound powder of selecting is Mg 17Al 12Spherical powder, average particle diameter are 58 μ m.The original pattern of two kinds of powder is as shown in Figure 1.The matrix that adopts is a T6 attitude Al6061 duraluminum.With rafifinal powder and Mg 17Al 12Spherical powder mechanically mixing 10-30 minute then, obtains mixed powder after being mixing in 75: 25 according to atomic ratio.Acetone is used on the aluminum substrate surface, and dry, adopt above-mentioned mixed powder to carry out cold spraying afterwards.Working gas and particle carrier gas are helium in the cold spraying, and the pressure and temperature of working gas in the spray gun ingress is respectively 0.98MPa and 300 ℃, and the pressure of carrier gas is 1.04MPa, and temperature is a room temperature.Powder feeding rate is controlled at about 15g/min, and the distance that spray gun exports to matrix surface is 15mm, and matrix is 3mm/s with respect to the translational speed of spray gun, the single pass deposition.The coat-thickness that obtains is 612 ± 37 μ m, and porosity is lower than 0.3%, Mg 17Al 12Content in coating is 3.2 ± 1.1%, and coating hardness is 53.4 ± 3.6 (Hv100g), and the bonding strength of coating is 18.1 ± 2.7MPa (according to the EN15340 standard).
Embodiment 2
Select the aluminium powder form identical, magnalium intermetallic compound powder and matrix with embodiment 1.With rafifinal powder and Mg 17Al 12Spherical powder mechanically mixing 10-30 minute then, obtains mixed powder after being mixing in 50: 50 according to atomic ratio.The aluminum substrate surface is also dry with acetone.Adopt above-mentioned mixed powder to carry out cold spraying afterwards.Working gas and particle carrier gas are helium in the cold spraying, and the pressure and temperature of working gas in the spray gun ingress is respectively 0.98MPa and 300 ℃, and the pressure of carrier gas is 1.04MPa, and temperature is a room temperature.Powder feeding rate is controlled at about 15g/min, and the distance that spray gun exports to matrix surface is 10mm, and matrix is 1mm/s with respect to the translational speed of spray gun, the single pass deposition.The coating that obtains is as shown in Figure 2, and its thickness is 2369 ± 46 μ m, and porosity is lower than 0.2%, Mg 17Al 12Content in coating is 4.6 ± 2.8%, and coating hardness is 56.8 ± 4.2 (Hv100g), and the bonding strength of coating is 27.9 ± 3.6MPa.
Embodiment 3
Select aluminium powder form and the magnalium intermetallic compound powder identical with embodiment 1.The matrix that adopts is the AZ91D magnesiumalloy of as cast condition.With rafifinal powder and Mg 17Al 12Spherical powder mechanically mixing 10-30 minute then, obtains mixed powder after being mixing in 25: 75 according to atomic ratio.The magnesium matrix surface is also dry with acetone.Adopt above-mentioned mixed powder to carry out cold spraying afterwards.Working gas and particle carrier gas are helium in the cold spraying, and the pressure and temperature of working gas is 0.98MPa and 300 ℃, and the pressure of carrier gas is 1.04MPa, and temperature is a room temperature.Powder feeding rate is about 15g/min, and the distance that spray gun exports to matrix surface is 10mm, and matrix is 2mm/s with respect to the translational speed of spray gun, two pass time deposition.The coating that obtains is as shown in Figure 3.Its thickness is 1873 ± 42 μ m, and porosity is lower than 0.35%, Mg 17Al 12Content in coating is 7.8 ± 2.3%, and coating hardness is 58.8 ± 2.9, and the bonding strength of coating is 19.7 ± 1.6MPa.
The hardness of cold spraying fine aluminium coating is 46.2 ± 1.9, and bonding strength is 8.7 ± 0.5MPa.Can find Mg 17Al 12Though the content of particle in coating is very low, still improved the hardness of coating, significantly improved the bonding strength of coating simultaneously.Should be pointed out that and in cold spray process, to adopt higher air pressure and temperature if further improve the hardness of coating, perhaps use the Mg of irregular pattern 17Al 12Particle replaces the Mg of spherical morphology 17Al 12Particle is used for improving the content of hard phase particles in coating.Yet after the content of hard phase particles surpassed a specific threshold value, coating and matrix may descend in bonding strength at the interface.

Claims (5)

1. the raising method of an aluminum coating bonding strength is characterized in that, through with compound Mg between aluminium powder and spherical metal 17Al 12The powder mechanically mixing, and with mixed powder under specific processing condition, cold spraying is in matrix surface; Described specific processing condition are: adopt helium as working gas and particle carrier gas; The pressure and temperature of working gas in the spray gun ingress is respectively 0.98MPa and 300 ℃, and the pressure of carrier gas is 1.04MPa, and temperature is a room temperature; Powder feeding rate is 15g/min, and the distance that exports to matrix surface of spray gun is 10-15mm and matrix with respect to the translational speed of spray gun is 1-3mm/s.
2. the raising method of aluminum coating bonding strength according to claim 1 is characterized in that, described aluminium powder is a rafifinal, and massfraction is greater than 99% and get the aluminum particulate of particle dia less than 45 μ m through screening.
3. the raising method of aluminum coating bonding strength according to claim 1 is characterized in that, described Mg 17Al 12The average particle diameter of spherical powder is 58 μ m.
4. the raising method of aluminum coating bonding strength according to claim 1 is characterized in that, described matrix surface is through acetone and dry.
5. according to the raising method of claim 1 or 4 described aluminum coating bonding strengths, it is characterized in that described matrix is the Al6061 duraluminum of T6 attitude or the AZ91D magnesiumalloy of as cast condition.
CN2011100637158A 2011-03-16 2011-03-16 Method for enhancing bonding strength of aluminum coating Expired - Fee Related CN102154640B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100637158A CN102154640B (en) 2011-03-16 2011-03-16 Method for enhancing bonding strength of aluminum coating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100637158A CN102154640B (en) 2011-03-16 2011-03-16 Method for enhancing bonding strength of aluminum coating

Publications (2)

Publication Number Publication Date
CN102154640A CN102154640A (en) 2011-08-17
CN102154640B true CN102154640B (en) 2012-10-31

Family

ID=44436303

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011100637158A Expired - Fee Related CN102154640B (en) 2011-03-16 2011-03-16 Method for enhancing bonding strength of aluminum coating

Country Status (1)

Country Link
CN (1) CN102154640B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105525287A (en) * 2016-01-06 2016-04-27 中国石油大学(华东) Cold spraying aluminum-based self-lubrication abrasion-resistant coating and preparation method thereof
CN105525286A (en) * 2016-01-06 2016-04-27 中国石油大学(华东) Cold spraying aluminum-based self-lubrication abrasion-resistant coating and preparation method thereof
CN105543835A (en) * 2016-01-06 2016-05-04 中国石油大学(华东) Cold-spraying aluminum-base corrosion-resistant coating and preparation method thereof

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102400001B (en) * 2011-12-02 2015-02-11 九江学院 Method for preparing granule reinforced aluminum-based composite material of in-situ intermetallic compound
CN106864179A (en) * 2017-03-14 2017-06-20 上海源紊新能源科技有限公司 A kind of automobile active safety device with electromagnetic shielding effect
CN106835113A (en) * 2017-03-14 2017-06-13 深圳智达机械技术有限公司 A kind of magnesium alloy for having electromagnetic shielding and antiseptic effect concurrently
CN107338433A (en) * 2017-07-11 2017-11-10 西安建筑科技大学 A kind of preparation method of Mg alloy surface amorphous alloy coating
CN111519180A (en) * 2020-04-21 2020-08-11 中国科学院宁波材料技术与工程研究所 Metal ceramic composite coating for airplane wing and preparation method thereof
CN113265652A (en) * 2020-12-02 2021-08-17 兆山科技（北京）有限公司 Method for preparing high-entropy borosilicate ceramic surface material by utilizing cold spraying

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1651605A (en) * 2005-03-09 2005-08-10 沈阳工业大学 Spray coating technology of magnesium alloy surface protective layer
CN101831652A (en) * 2009-03-11 2010-09-15 中国科学院金属研究所 Method for preparing Al-Al2O3 composite coating on surface of magnesium alloy

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100802328B1 (en) * 2005-04-07 2008-02-13 주식회사 솔믹스 Method of preparing wear-resistant coating layer comprising metal matrix composite and coating layer prepared by using the same
US20100015467A1 (en) * 2006-11-07 2010-01-21 H.C. Starck Gmbh & Co., Kg Method for coating a substrate and coated product

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1651605A (en) * 2005-03-09 2005-08-10 沈阳工业大学 Spray coating technology of magnesium alloy surface protective layer
CN101831652A (en) * 2009-03-11 2010-09-15 中国科学院金属研究所 Method for preparing Al-Al2O3 composite coating on surface of magnesium alloy

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP特表2010-509502A 2010.03.25
郭辉华等.冷喷涂涂层的结合机理.《材料导报》.2008,第22卷(第12期),第56-59页. *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105525287A (en) * 2016-01-06 2016-04-27 中国石油大学(华东) Cold spraying aluminum-based self-lubrication abrasion-resistant coating and preparation method thereof
CN105525286A (en) * 2016-01-06 2016-04-27 中国石油大学(华东) Cold spraying aluminum-based self-lubrication abrasion-resistant coating and preparation method thereof
CN105543835A (en) * 2016-01-06 2016-05-04 中国石油大学(华东) Cold-spraying aluminum-base corrosion-resistant coating and preparation method thereof
CN105543835B (en) * 2016-01-06 2018-05-11 中国石油大学(华东) A kind of cold spraying aluminium base anti-corrosion coating and preparation method thereof
CN105525286B (en) * 2016-01-06 2018-06-12 中国石油大学(华东) A kind of cold spraying aluminium base self-lubricating abrasion-resistant erosion resisting coating and preparation method thereof
CN105525287B (en) * 2016-01-06 2018-06-12 中国石油大学(华东) A kind of cold spraying aluminium base self-lubricating wear-resistant coating and preparation method thereof

Also Published As

Publication number Publication date
CN102154640A (en) 2011-08-17

Similar Documents

Publication Publication Date Title
CN102154640B (en) Method for enhancing bonding strength of aluminum coating
CN102154639B (en) Aluminum-particle-based method for preparing coating by cold spray deposition
CN101285187B (en) Method for preparing particulate reinforced metal-based composite material
CN103484814B (en) The preparation method of titanium boride base inorganic composite materials coating
CN104894554A (en) Preparation method of high density cold spraying metal/metal-based sedimentary body and application thereof
CN102400001B (en) Method for preparing granule reinforced aluminum-based composite material of in-situ intermetallic compound
CN102560178B (en) Method for preparing porous material
CN106381459A (en) Preparation method for zirconium boride-based coating
CN105603352B (en) Al2O3/ YAG amorphous/eutectic composite ceramic coat and preparation method thereof
CN113445041B (en) Preparation method of low-cost light high-entropy alloy/aluminum oxide composite coating on surface of magnesium alloy
CN107338433A (en) A kind of preparation method of Mg alloy surface amorphous alloy coating
CN109365803A (en) A kind of aluminum alloy complex component increasing material manufacturing method that powder surface rare earth is modified
RU2439198C2 (en) Production method of wear resistant composite nano-structured coating
CN110129708B (en) Preparation method of FeCoNiCrAlMnM multi-principal-element alloy coating
WO2020173151A1 (en) Method for preparing amorphous oxide ceramic composite coating simultaneously having toughness, thermal conductivity and high-temperature structural stability
CN100510155C (en) Ti-Fe-Ni-C series reaction thermal spraying composite powder and preparation technique thereof
CN103469200B (en) A kind of method preparing nanocoating
CN110014146A (en) A kind of nickel-molybdenum iron chromium-diamond alloy composite powder and its preparation method and application
CN101545087B (en) Micro-composite Fe-Al/Al2O3 ceramic coating and preparation method thereof
CN102443796A (en) Porous Fe-Al intermetallic compound coating and its preparation method
CN104372284A (en) Preparation method of plasma sprayed TiN coating layer having relatively good hardness and toughness
CN103691938A (en) Surface alloying method for metal coated powder
CN102424967A (en) Method for preparing intermetallic-compound-based composite material reinforced by in-situ nano ceramic particles
CN110616397A (en) Preparation of Al/(Y) by atmospheric plasma spraying2O3-ZrO2) Method for composite coating
CN110184558B (en) Method for preparing nanocrystalline TiVN coating by reactive plasma spraying

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121031

Termination date: 20150316

EXPY Termination of patent right or utility model