CN102021557B - Preparation method of Al2O3 and TiB2 compound coating synthesized by aluminium alloy surface stirring rubbing processing and heating reaction - Google Patents

Preparation method of Al2O3 and TiB2 compound coating synthesized by aluminium alloy surface stirring rubbing processing and heating reaction Download PDF

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Publication number
CN102021557B
CN102021557B CN2010105708920A CN201010570892A CN102021557B CN 102021557 B CN102021557 B CN 102021557B CN 2010105708920 A CN2010105708920 A CN 2010105708920A CN 201010570892 A CN201010570892 A CN 201010570892A CN 102021557 B CN102021557 B CN 102021557B
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China
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compound coating
powder
tib
al2o3
agitating friction
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CN2010105708920A
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CN102021557A (en
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周小平
胡心彬
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Hubei University of Technology
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Hubei University of Technology
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Abstract

The invention relates to an Al2O3 and TiB2 compound coating synthesized by aluminium alloy surface stirring rubbing processing and heating reaction and preparation method of Al2O3+TiB2 compound coating. In the preparation method, a plurality of grooves with the depth of 0.5-2mm and the width of 0.5-2mm; ball-milled mixed powder containing 30-70% of TiO2 and 30%-70% of B2O3 is filled in the grooves; the mixed powder containing TiO2 and B2O3 is uniformly distributed in the surface layer of aluminium alloy through stirring rubbing processing; and induction heating is carried out on the surface layer, a chemical reaction, namely 3TiO2+3B2O3+10Al=3TiB2+5Al2O3, is generated; and the Al2O3 and TiB2 compound coating is obtained, and a metallurgy bond interface is formed between the coating and a substrate. By adopting the Al2O3 and TiB2 compound coating obtained by the preparation method, the hardness is larger than 1200HV, and the bond strength is larger than 70 MPa.

Description

Processing of aluminum alloy surface agitating friction and reacting by heating synthetic A1 2O 3+ TiB 2The preparation method of compound coating
Technical field
The present invention relates to a kind of aluminum alloy surface agitating friction processing and reacting by heating synthetic A1 2O 3+ TiB 2The preparation method of compound coating belongs to field of material engineering technology.
Background technology
Duraluminum is the maximum nonferrous materials of consumption in the world, and it is widely used in Aeronautics and Astronautics and the power machine.But the hardness of duraluminum is very low, and wear resisting property is very poor, and range of application receives very big restriction.For example, change mover into duraluminum by original cast iron materials after because duraluminum wears no resistance,, significantly reduce the work-ing life of mover with the part generation heavy wear that the engine cylinder inwall is contacted with piston.In addition, synchro converter ring, piston-ring etc. requires attrition resistant component, the requirement of adopting the duraluminum manufacturing also not reach wear resistance.
The agitating friction processing technology is a kind of technology of novel preparation metal-base composites, and it is to utilize stirring-head to cause violent viscous deformation, mixing, the fragmentation of process zone material, realizes the refinement of material microtexture, homogenizing and densification.The agitating friction course of processing is fixed on matrix on the rigidity backing plate exactly, and the mode through to cutting groove on sheet is preset in strongthener in the body material.The stirring-head high speed rotating, under downward pressure effect, the stirring-head probe pierces workpiece surface, and the tight contact workpiece of shaft shoulder surface is until being pressed into the following certain depth of material surface.The stirring-head of high speed rotating produces great amount of heat through Coulomb's friction and shearing friction, and near its metal temperature is raise rapidly, form molten state, and the generation material moves rapidly on a large scale.In the time of the stirring-head high speed rotating; Move along machine direction; The body material that the strongthener of inserting is melted covers, parcel, and is cut into the unit of a lot of small volumes, and these unit constantly move with the agitating friction course of processing; Finally rest in the finished zone of stirring-head, accomplish the preparation of matrix material under the solid phase course of processing.
Utilize the agitating friction processing technology to prepare metal-base composites; Compare with other preparing methods and to have special advantages: (1) its solid phase course of processing can obviously reduce the generation of metal (especially duraluminum) hole, and weave construction is fine and close, crystal grain can than limits by refinement; (2) aspect residual set and unrelieved stress, lower Heating temperature can make residual set and unrelieved stress all fall at the end in the Solid-phase welding process; (3) aspect defective, can avoid solidification cracking and pore.
Summary of the invention
The object of the present invention is to provide a kind of aluminum alloy surface agitating friction processing and reacting by heating synthetic A1 2O 3+ TiB 2The preparation method of compound coating.
In order to realize the object of the invention, the contriver has finally obtained following scheme through a large amount of experimental studies:
Processing of aluminum alloy surface agitating friction and reacting by heating synthetic A1 2O 3+ TiB 2The preparation method of compound coating may further comprise the steps:
(a) aluminum alloy surface oil removing and sandblasting;
(b) powder carries out ball milling, and the per-cent of each powder is during ball milling: 30%~70% TiO 2Powder, 30%~70% B 2O 3Powder, each component sum is 100%;
(c) leave groove at aluminium alloy matrix surface;
(d) mixed powder with step (b) is filled in the groove of leaving;
(e) carry out agitating friction processing;
(f) induction heating is carried out on the surface after the agitating friction processing.
Above-mentioned A1 2O 3+ TiB 2The preparation method of compound coating, the said ball milling time is 1~50 hour, ball-to-powder weight ratio is 10~20:1.
Above-mentioned A1 2O 3+ TiB 2The preparation method of compound coating, the diameter of the stirring-head of said agitating friction processing is ф 10 ㎜~ф 30 ㎜, and rotating speed is 200rpm~800rpm, and translational speed is 10 ㎜/min~100 ㎜/min.
Above-mentioned A1 2O 3+ TiB 2The preparation method of compound coating, said agitating friction adds the groove of on matrix, leaving man-hour, is 0.5mm~2mm deeply, and wide is 0.5mm~2mm, and the gap between groove is 0.5mm~1mm.
Above-mentioned A1 2O 3+ TiB 2The preparation method of compound coating, the processing parameter of said induction heating is: Heating temperature is 650 ℃~700 ℃, rate of heating is 10 ℃/S~20 ℃/S.
Aluminum alloy surface agitating friction processing of the present invention and reacting by heating synthetic A1 2O 3+ TiB 2Compound coating and preparation method thereof has following beneficial technical effects:
The present invention makes TiO through agitating friction processing 2And B 2O 3Powder is evenly distributed in the aluminum alloy surface layer.Through induction heating, produce chemical reaction 3TiO 2+ 3B 2O 3+ 10Al=3TiB 2+ 5Al 2O 3, obtain A1 2O 3+ TiB 2Compound coating forms metallurgical bonding interface between coating and matrix.The A1 that the present invention obtains 2O 3+ TiB 2Compound coating hardness>1200HV, bonding strength>70MPa.
Embodiment
Below be specific embodiment of the present invention, technical scheme of the present invention is done further the description, but protection scope of the present invention is not limited to these embodiment.Every do not deviate from the change of the present invention design or be equal to substitute include within protection scope of the present invention.
Below be specific embodiment of the present invention, technical scheme of the present invention is done further the description, but protection scope of the present invention is not limited to these embodiment.Every do not deviate from the change of the present invention design or be equal to substitute include within protection scope of the present invention.
Embodiment 1 A1 2O 3+ TiB 2The preparation of compound coating
Body material: duraluminum.
The mass percent of powder constituent is: 30% TiO 2Powder, 70% B 2O 3Powder.Powder size 10 μ m.
The width that matrix surface is attend institute's open channels is 1mm, and the degree of depth is 1mm, and the gap between groove is 0.5mm.
The agitating friction working process parameter: the stirring-head diameter is ф 10 ㎜, and rotating speed is 300rpm, and translational speed is 20 ㎜/min.
Induction heating temperature is 650 ℃, and rate of heating is 10 ℃/s.
Embodiment 2 A1 2O 3+ TiB 2The preparation of compound coating
Body material: duraluminum.
The mass percent of powder constituent is: 40% TiO 2Powder, 60% B 2O 3Powder.Powder size 15 μ m.
The width of groove is 1.5mm on the matrix, and the degree of depth is 1.5mm, and the gap between groove is 0.7mm.
The agitating friction working process parameter: the stirring-head diameter is ф 15 ㎜, and rotating speed is 500rpm, and translational speed is 40 ㎜/min.
Induction heating temperature is 670 ℃, and rate of heating is 15 ℃/s.
Embodiment 3 A1 2O 3+ TiB 2The preparation of compound coating
Body material: duraluminum.
The mass percent of powder constituent is: 50% TiO 2Powder, 50% B 2O 3Powder.Powder size 20 μ m.
The width of groove is 2mm on the matrix, and the degree of depth is 2mm, and the gap between groove is 1mm.
The agitating friction working process parameter: the stirring-head diameter is ф 20 ㎜, and rotating speed is 600rpm, and translational speed is 30 ㎜/min.
Induction heating temperature is 700 ℃, and rate of heating is 20 ℃/s.
Through detecting the A1 of the foregoing description 1-3 preparation 2O 3+ TiB 2Compound coating, its hardness>1200HV, bonding strength>70Mpa.

Claims (5)

1. the aluminum alloy surface agitating friction is processed and reacting by heating synthetic A1 2O 3+ TiB 2The preparation method of compound coating may further comprise the steps:
(a) aluminum alloy surface oil removing and sandblasting;
(b) powder carries out ball milling, and the per-cent of each powder is during ball milling: 30%~70% TiO 2Powder, 30%~70% B 2O 3Powder, each component sum is 100%;
(c) leave groove at aluminium alloy matrix surface;
(d) mixed powder with step (b) is filled in the groove of leaving;
(e) carry out agitating friction processing;
(f) induction heating is carried out on the surface after the agitating friction processing.
2. A1 according to claim 1 2O 3+ TiB 2The preparation method of compound coating is characterized in that: the said ball milling time is 1~50 hour, and ball-to-powder weight ratio is 10~20:1.
3. A1 according to claim 1 2O 3+ TiB 2The preparation method of compound coating, the diameter of the stirring-head of said agitating friction processing is ф 10 ㎜~ф 30 ㎜, and rotating speed is 200rpm~800rpm, and translational speed is 10 ㎜/min~100 ㎜/min.
4. A1 according to claim 1 2O 3+ TiB 2The preparation method of compound coating, said agitating friction adds the groove of on matrix, leaving man-hour, is 0.5mm~2mm deeply, and wide is 0.5mm~2mm, and the gap between groove is 0.5mm~1mm.
5. A1 according to claim 1 2O 3+ TiB 2The preparation method of compound coating, the processing parameter of said induction heating is: Heating temperature is 650 ℃~700 ℃, rate of heating is 10 ℃/s~20 ℃/s.
CN2010105708920A 2010-12-03 2010-12-03 Preparation method of Al2O3 and TiB2 compound coating synthesized by aluminium alloy surface stirring rubbing processing and heating reaction Expired - Fee Related CN102021557B (en)

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CN102864450B (en) * 2012-08-08 2014-06-25 江苏大学 Method for preparing Al3Zr granule-enhanced high silicon and aluminum-based composite material
CN103276389B (en) * 2013-06-20 2016-08-17 山东大学 Aluminium oxide strengthens aluminum-based in-situ composite materials and preparation method thereof with zirconium diboride
CN103305825B (en) * 2013-06-21 2015-07-29 山东大学 A kind of aluminum oxide and three calorize zirconiums strengthen base surface in-situ composite material and preparation method thereof
CN103981517B (en) * 2014-05-07 2016-01-20 重庆理工大学 The aluminum alloy surface abrasion-proof structure of a kind of aluminum alloy surface modified technique and preparation thereof
CN106853560A (en) * 2016-12-01 2017-06-16 上海工程技术大学 The method that cold implantation based on laser texturing prepares metal-based self-lubricating coating
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Publication number Priority date Publication date Assignee Title
EP2850223B1 (en) * 2012-05-16 2020-03-18 Prayon S.A. Process for manufacturing a composite material

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Application publication date: 20110420

Assignee: Woodbridge GSK High Polymer Technology Co., Ltd.

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Denomination of invention: Method for preparing A12O3+TiB2 composite coating by stirring friction processing and heating reaction on aluminium alloy surface

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