CN106756811A - A kind of preparation method of alloy coating at high temperature - Google Patents
A kind of preparation method of alloy coating at high temperature Download PDFInfo
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- CN106756811A CN106756811A CN201510800578.XA CN201510800578A CN106756811A CN 106756811 A CN106756811 A CN 106756811A CN 201510800578 A CN201510800578 A CN 201510800578A CN 106756811 A CN106756811 A CN 106756811A
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Abstract
A kind of preparation method of alloy coating at high temperature, is characterized in that：Alloy bar is put into the crucible of vacuum chamber including the first step, ion gun target is put into ion gun；Second step moves to directly over alloy bar workpiece, sets the horizontal rotating speed of workpiece and baffle plate is moved between alloy bar and workpiece；3rd step electron gun prevapourising alloy bar, adjusts electronic beam current；4th step is preheated with electron gun to workpiece, adjusts electronic beam current；5th step reaches 700 DEG C when workpiece temperature, starts ion gun, is bombarded after ion gun extraction voltage is loaded；6th step electron gun prevapourising alloy bar, when billet surface is completely melt, in boiling-like, sets bar climbing speed；The reduction of ion gun extraction voltage is removed baffle plate by the 7th step, allows workpiece to be completely exposed among steam；After the evaporation of 8th step, electron gun and ion gun are closed, treat that workpiece is cooled to room temperature taking-up；The resistance to high temperature oxidation life-span of coating is improved using the technical scheme.
Description
Technical field
Metal coating techniques field is used the present invention relates to high-temperature component, specifically a kind of preparation method of alloy coating at high temperature.
Background technology
Prior art utilizes electro beam physics vapour deposition（EB-PVD）Prepare MCrAlY（Wherein M represents Ni, Co or NiCo）The method of alloy coating at high temperature has traditional EB-PVD technologies and gas Assisted by Ion Beam EB-PVD technologies.
EB-PVD is a kind of conventional technology for preparing MCrAlY coatings, the technical characteristic is to substrate preheating to uniform temperature, EB-PVD prepares MCrAlY coatings generally to be needed substrate preheating to 900 DEG C or so, then bar is heated with electron beam, melt bar material, boiling forms steam, steam condenses on matrix and forms coating.The advantage of EB-PVD technologies is deposition velocity fast, can reach 3-4 μm of deposition per minute, coating that can be with deposit thickness more than 100 μm, and coating surface is smooth, it is not necessary to which the treatment such as polishing can directly carry out EB-PVD thermal barrier coating depositions.
The energy of traditional EB-PVD steams is about 0.1-1eV, and energy mobility of atom during depositing coating is low, and the limited in one's ability of coating structure and performance is changed by technological parameter.And ion beam energy can reach several kilo electron volts, the energy greatly improves the mobility of atom, this growth for being enough to influence coating and structure, it is possible to achieve the regulation and control to coating microstrueture, obtains fine and close or loose coating, it is possible to regulate and control the stress of coating.
But in the prior art, the intensity that coating is combined with matrix has to be hoisted, life-span during coating resistance to high temperature oxidation is shorter, coating is in deposition, the depositing temperature of workpiece is higher, it is less desirable to coating structure ability of regulation and control, the composition and performance of alloying element can not be improved, in addition, EB-PVD depositing high temperature alloy coat processes can be polluted to ion gun, because gas ion source is high to the requirement of clean environment degree, cause the gas ion source cannot long-term stable operation in EB-PVD depositing high temperature alloy coats.
The content of the invention
The purpose of the present invention, exactly solves problem present in above technology, and the draft machine and preparation method of a kind of alloy coating at high temperature are provided for this.
A kind of preparation method of alloy coating at high temperature：
The first step, alloy bar is put into the crucible of vacuum chamber, and ion gun target is put into ion gun；
Second step, workpiece is moved to directly over alloy bar, and the horizontal rotating speed for setting workpiece is 12rpm, and baffle plate is moved between alloy bar and workpiece；
3rd step, with electron gun prevapourising alloy bar, line, when billet surface is completely melt, in boiling-like, is reduced to 0.2-0.4A by regulation electronic beam current to 1.6-1.9A；
4th step, is preheated with electron gun to workpiece, regulation electronic beam current 0.1A；
5th step, when workpiece temperature reaches 700 DEG C, starts ion gun, and ion gun extraction voltage is loaded into 5-7kV, bombards 4-7 minutes；
6th step, with electron gun prevapourising alloy bar, when billet surface is completely melt, in boiling-like, setting bar climbing speed 1mm/min；
7th step, 1-3kV is reduced to by ion gun extraction voltage, removes baffle plate, allows workpiece to be completely exposed among steam；
8th step, after evaporating 15-25 minutes, closes electron gun and ion gun, treats that workpiece is cooled to room temperature taking-up.
Further, the alloy bar is any one in Ni, Co, Cr aluminium yttrium, nichrome-chromium-aluminium-yttrium, cobalt chromium aluminium yttrium.
Further, the material of the ion gun target is any one in titanium, titanium alloy, hafnium, rhenium, Ni, Co, Cr aluminium yttrium, nichrome-chromium-aluminium-yttrium, cobalt chromium aluminium yttrium.
Further, it is evacuated to 1 × 10 in the vacuum chamber-2Below Pa.
Advantages of the present invention：
1.
The intensity that coating is combined with matrix is improved；
2.
Improve the resistance to high temperature oxidation life-span of coating；
3.
Metal ion beam has activation ionization to vaporous cloud, thus coating can reduce the depositing temperature of workpiece in deposition.
4. lifting improves the composition and performance of alloying element to coating structure ability of regulation and control, being capable of long-term stable operation in EB-PVD depositing high temperature alloy coats.
Brief description of the drawings
Fig. 1 is the structure schematic diagram of facilities and equipments of the present invention.
Specific embodiment
In order that the present invention is easier to be understood, technical scheme is described in detail below in conjunction with accompanying drawing and embodiment.
Embodiment 1
As shown in figure 1, a kind of preparation method of alloy coating at high temperature：The first step, alloy bar is put into the crucible 5 of vacuum chamber 7, and ion gun target is put into ion gun 6, and the material of ion gun target is any one in titanium, titanium alloy；Second step, workpiece 2 is moved to directly over alloy bar, and the rotating speed of trunnion axis 3 for setting workpiece 2 is 12rpm, and baffle plate 4 is moved between alloy bar and workpiece 2, and alloy bar is Ni, Co, Cr aluminium yittrium alloy bar；3rd step, with the prevapourising alloy bar of electron gun 8, line, when billet surface is completely melt, in boiling-like, is reduced to 0.2A by regulation electronic beam current to 1.6A；4th step, is preheated with electron gun 8 to workpiece 2, regulation electronic beam current 0.1A；5th step, when the temperature of workpiece 2 reaches 700 DEG C, starts ion gun 6, and the extraction voltage of ion gun 6 is loaded into 5kV, bombards 4 minutes；6th step, with the prevapourising alloy bar of electron gun 8, when billet surface is completely melt, in boiling-like, setting bar climbing speed 1mm/min；7th step, 1kV is reduced to by the extraction voltage of ion gun 6, removes baffle plate 4, allows workpiece 2 to be completely exposed among steam；8th step, after evaporating 15 minutes, closes electron gun 8 and ion gun 6, treats that workpiece 2 is cooled to room temperature taking-up.
Embodiment 2
As shown in figure 1, a kind of preparation method of alloy coating at high temperature：The first step, alloy bar is put into the crucible 5 of vacuum chamber 7, and ion gun target is put into ion gun 6, and the material of ion gun target is any one in hafnium, rhenium, and 1 × 10 is evacuated in the vacuum chamber-2Below Pa；Second step, workpiece 2 is moved to directly over alloy bar, and the rotating speed of trunnion axis 3 for setting workpiece 2 is 12rpm, and baffle plate 4 is moved between alloy bar and workpiece 2, and alloy bar is nichrome-chromium-aluminium-yttrium alloy bar；3rd step, with the prevapourising alloy bar of electron gun 8, line, when billet surface is completely melt, in boiling-like, is reduced to 0.3A by regulation electronic beam current to 1.8A；4th step, is preheated with electron gun 8 to workpiece 2, regulation electronic beam current 0.1A；5th step, when the temperature of workpiece 2 reaches 700 DEG C, starts ion gun 6, and the extraction voltage of ion gun 6 is loaded into 6kV, bombards 5 minutes；6th step, with the prevapourising alloy bar of electron gun 8, when billet surface is completely melt, in boiling-like, setting bar climbing speed 1mm/min；7th step, 2kV is reduced to by the extraction voltage of ion gun 6, removes baffle plate 4, allows workpiece 2 to be completely exposed among steam；8th step, after evaporating 20 minutes, closes electron gun 8 and ion gun 6, treats that workpiece 2 is cooled to room temperature taking-up.
Embodiment 3
As shown in figure 1, a kind of preparation method of alloy coating at high temperature：The first step, alloy bar is put into the crucible 5 of vacuum chamber 7, alloy bar is cobalt chromium aluminium yittrium alloy bar, and ion gun target is put into ion gun 6, the material of ion gun target is any one in Ni, Co, Cr aluminium yttrium, nichrome-chromium-aluminium-yttrium, cobalt chromium aluminium yttrium, and 1 × 10 is evacuated in the vacuum chamber-2Below Pa；Second step, workpiece 2 is moved to directly over alloy bar, and the rotating speed of trunnion axis 3 for setting workpiece 2 is 12rpm, and baffle plate 4 is moved between alloy bar and workpiece 2；3rd step, with the prevapourising alloy bar of electron gun 8, line, when billet surface is completely melt, in boiling-like, is reduced to 0.4A by regulation electronic beam current to 1.9A；4th step, is preheated with electron gun 8 to workpiece 2, regulation electronic beam current 0.1A；5th step, when the temperature of workpiece 2 reaches 700 DEG C, starts ion gun 6, and the extraction voltage of ion gun 6 is loaded into 7kV, bombards 7 minutes；6th step, with the prevapourising alloy bar of electron gun 8, when billet surface is completely melt, in boiling-like, setting bar climbing speed 1mm/min；7th step, 3kV is reduced to by the extraction voltage of ion gun 6, removes baffle plate 4, allows workpiece 2 to be completely exposed among steam；8th step, after evaporating 25 minutes, closes electron gun 8 and ion gun 6, treats that workpiece 2 is cooled to room temperature taking-up.
Claims (4)
1. a kind of preparation method of alloy coating at high temperature, it is characterised in that：
The first step, alloy bar is put into the crucible of vacuum chamber, and ion gun target is put into ion gun；
Second step, workpiece is moved to directly over alloy bar, and the horizontal rotating speed for setting workpiece is 12rpm, and baffle plate is moved between alloy bar and workpiece；
3rd step, with electron gun prevapourising alloy bar, line, when billet surface is completely melt, in boiling-like, is reduced to 0.2-0.4A by regulation electronic beam current to 1.6-1.9A；
4th step, is preheated with electron gun to workpiece, regulation electronic beam current 0.1A；
5th step, when workpiece temperature reaches 700 DEG C, starts ion gun, and ion gun extraction voltage is loaded into 5-7kV, bombards 4-7 minutes；
6th step, with electron gun prevapourising alloy bar, when billet surface is completely melt, in boiling-like, setting bar climbing speed 1mm/min；
7th step, 1-3kV is reduced to by ion gun extraction voltage, removes baffle plate, allows workpiece to be completely exposed among steam；
8th step, after evaporating 15-25 minutes, closes electron gun and ion gun, treats that workpiece is cooled to room temperature taking-up.
2. the preparation method of a kind of alloy coating at high temperature according to claim 1, it is characterised in that：The alloy bar is any one in Ni, Co, Cr aluminium yttrium, nichrome-chromium-aluminium-yttrium, cobalt chromium aluminium yttrium.
3. the preparation method of a kind of alloy coating at high temperature according to claim 1, it is characterised in that：The material of the ion gun target is any one in titanium, titanium alloy, hafnium, rhenium, Ni, Co, Cr aluminium yttrium, nichrome-chromium-aluminium-yttrium, cobalt chromium aluminium yttrium.
4. the preparation method of a kind of alloy coating at high temperature according to claim 1, it is characterised in that：1 × 10 is evacuated in the vacuum chamber-2Below Pa.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628893A (en) * | 2018-12-27 | 2019-04-16 | 广州海鸥住宅工业股份有限公司 | A kind of method of electron beam evaporation nickel plating |
| CN114717519A (en) * | 2022-02-21 | 2022-07-08 | 北京金轮坤天特种机械有限公司 | Preparation method of super-thick electron beam physical vapor deposition thermal barrier coating |
| CN115094388A (en) * | 2022-07-08 | 2022-09-23 | 广东信大科技有限公司 | Heating pipe coating method and rose gold pipe and gold pipe prepared by same |
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| CN102212786A (en) * | 2011-05-27 | 2011-10-12 | 中国航空工业集团公司北京航空制造工程研究所 | Method for preparing thermal barrier coating |
| CN102703863A (en) * | 2012-04-11 | 2012-10-03 | 华北电力大学 | Preparation method of high-temperature oxidation-resistant ReAl coating |
| CN103710669A (en) * | 2013-12-23 | 2014-04-09 | 大连理工大学 | Preparation method of alloy 740 surface antioxidation coating |
| WO2014126633A2 (en) * | 2012-12-26 | 2014-08-21 | United Technologies Corporation | Spallation-resistant thermal barrier coating |
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| CN1844445A (en) * | 2006-05-11 | 2006-10-11 | 北京航空航天大学 | Method for depositing thermal barrier coating of porous dentrite ceramic layer by electron beam physical vapor deposition process |
| CN101787516A (en) * | 2010-01-22 | 2010-07-28 | 北京航空航天大学 | MCrAlY coating with excellent oxidation resistance and preparation method thereof |
| CN102212786A (en) * | 2011-05-27 | 2011-10-12 | 中国航空工业集团公司北京航空制造工程研究所 | Method for preparing thermal barrier coating |
| CN102703863A (en) * | 2012-04-11 | 2012-10-03 | 华北电力大学 | Preparation method of high-temperature oxidation-resistant ReAl coating |
| WO2014126633A2 (en) * | 2012-12-26 | 2014-08-21 | United Technologies Corporation | Spallation-resistant thermal barrier coating |
| CN103710669A (en) * | 2013-12-23 | 2014-04-09 | 大连理工大学 | Preparation method of alloy 740 surface antioxidation coating |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628893A (en) * | 2018-12-27 | 2019-04-16 | 广州海鸥住宅工业股份有限公司 | A kind of method of electron beam evaporation nickel plating |
| CN114717519A (en) * | 2022-02-21 | 2022-07-08 | 北京金轮坤天特种机械有限公司 | Preparation method of super-thick electron beam physical vapor deposition thermal barrier coating |
| CN114717519B (en) * | 2022-02-21 | 2023-01-31 | 北京金轮坤天特种机械有限公司 | Preparation method of super-thick electron beam physical vapor deposition thermal barrier coating |
| CN115094388A (en) * | 2022-07-08 | 2022-09-23 | 广东信大科技有限公司 | Heating pipe coating method and rose gold pipe and gold pipe prepared by same |
| CN115094388B (en) * | 2022-07-08 | 2024-02-09 | 广东信大科技有限公司 | Heating pipe coating method and rose gold pipe prepared by heating pipe coating method |
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Address after: 100024 Beijing city Chaoyang District eight Bridge North East Junzhuang No. 1 Applicant after: China Institute of Aeronautical Manufacturing Technology Address before: 100024 Beijing city Chaoyang District eight Bridge North East Junzhuang No. 1 Applicant before: Beijing Aviation Manufacturing Engineering Institute of China Aviation Industry Group Company |
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Application publication date: 20170531 |