CN100406614C - Spray coating technology of magnesium alloy surface protective layer - Google Patents
Spray coating technology of magnesium alloy surface protective layer Download PDFInfo
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- CN100406614C CN100406614C CNB2005100459846A CN200510045984A CN100406614C CN 100406614 C CN100406614 C CN 100406614C CN B2005100459846 A CNB2005100459846 A CN B2005100459846A CN 200510045984 A CN200510045984 A CN 200510045984A CN 100406614 C CN100406614 C CN 100406614C
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- protective layer
- magnesium alloy
- micro mist
- micropowder
- zinc
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Abstract
The present invention provides a spraying technique for a protective layer on the surface of magnesium alloy, which is characterized in that rapid condensation zinc aluminium alloy micropowder is used as raw materials and shaped by a cold spraying technique. The zinc aluminium alloy micropowder comprises the following ingredients: 5 to 30 wt% of aluminium and 95 to 70 wt% of zinc; the granularity of the micropowder is from 25 to 75 micrometers; the zinc aluminium alloy micropowder is manufactured by a supersonic fog method or a laser evaporation method. The cold spraying technique for a protective layer of the present invention comprises the following steps: (1) base materials are washed and preheated, and shot peening is carried out; (2) the micropowder is prepared, sieved and dried; (3) three processes of spraying are carried out under the pressure of 1.5 to 2.5MPa at the temperature of 150 to 400 DEG C. The coating layer manufactured by the technique of the present invention has the advantages of compact structure, uniform particle, favorable properties, safe operation, no pollution for the environment, and favorable social benefit and economic benefit; the thickness can be regulated in a large range.
Description
Technical field
The invention belongs to the technical field of metallic substance coating processes, a kind of magnesium alloy protective layer novel surface spraying technology promptly is provided.
Background technology
At present, the magnesium alloy surface protective treatment technology is used the plasma micro-arc anonizing more, and this method also can play wear-resisting effect when playing preservative activity.But the surface film oxide that forms with this method is thinner, and its wear-resisting effect is very limited.In addition, the method for the also available plating of magnesium alloy, electrochemistry plating is protected, and Mg (OH) is arranged in the electroplate liquid
2And Cr (OH)
3Cr solution can improve coating quality and neutral corrosion protection is provided, but the mixture that contains Cr has severe toxicity, tends to pollute to environment.The research report is arranged in the recent period, can carry out thermospray at Mg alloy surface, as protective layers such as thermal spraying aluminums.But magnesium itself is a kind of very active metal, and thermospray causes magnesium alloy easily and produces strong reaction, and vigorous oxidation takes place; Even the intensive spark of setting out out, can threaten to operator's safety, moreover, thermospray can also cause that part element in the phase transformation, alloy of magnesium alloy decomposes and the appearance of phenomenons such as volatilization so that oxidation, has problems.
On the other hand, in the technical field of metallic substance coating processes, development in recent years goes out the novel process that a kind of powder that adopts flash set technology to make carries out thermospray and plasma spraying.Micro mist refuse resolidification in the process of thermospray that flash set technology is made, so its formed coating not exclusively possesses the weave construction and the performance characteristic of rapid solidification micro mist, like this, desired fast performance advantage of coagulating alloy still can't play a role in surface protecting layer.
Summary of the invention
The inventor has carried out synthetic study to Mg alloy surface performance and metallic substance coating processes, at the problem that prior art exists, has proposed a kind of fast novel process of coagulating sprayed coating that is applicable to magnesium alloy surface protective.Problems such as the above-mentioned shortcoming of fast coagulation coating technology of preparing and the wearing and tearing of Mg alloy surface burn into have been solved, the problems that exist in the existing magnesium alloy surface protective layer manufacturing process such as also avoided that low-level oxidation method oxide film is thin simultaneously, electrochemical plating environmental pollution and plasma spraying method cause the Mg alloy surface oxidation process synthesis of the present invention.
The spraying coating process of magnesium alloy surface protective layer provided by the present invention is characterized in that preparing that the aluminium zinc micro mist is made raw material and with the cold spray process moulding in the mode of rapid solidification.
Coated material of the present invention is the aluminium zinc micro mist made from the method for rapid condensation, and the composition of alloy is calculated by weight percentage and is aluminium (Al): 5～30; Zinc (Zn) 95～70, powder size are 25～75 microns.
The cold spray process that the present invention adopts is to implement like this:
(A) with the magnesium alloy base material with acetone or alcohol-pickled oil removing, shot-peening, preheating;
(B) with the rapid condensation method prepare aluminium zinc micro mist, screening, dry bottling is standby;
(C) be 150～400 ℃ in temperature, pressure is with the aluminium zinc micro mist magnesium alloy base material to be sprayed under the condition of 1.5～2.5MPa.
Rapid condensation method of the present invention can be the supersonic gas atomization; It also can be the laser evaporation method.
Compare with prior art, advantage of the present invention is:
(1) because coating adopts and to coagulate the aluminium zinc micro mist soon, and spraying temperature is far below the fusing point and the transformation temperature of micro mist, and coated material weave construction and performance are not given change, so its anticorrosion antiwear performance excellence very all;
(2) because spraying temperature is low, the magnesium alloy base material also can not undergo phase transition and oxidation, and the original performance of base material also can be remained unchanged;
(3) coating particles is even, and no component segregation phenomenon, and compact structure do not crack, and regulates so its thickness is allowed in a big way, has overcome the shortcoming of the existing coating technology cover light of magnesium alloy;
(4) coating process does not produce kickback and causes spark, and operational safety does not discharge toxic substance (as Cr ion, environmentally safe simultaneously yet.
Description of drawings
Fig. 1 is a process flow sheet of the present invention;
Fig. 2 is the metallograph of embodiment 1, can visible aluminium zinc coating (Zn-Al alloy Coat) from figure and the interface topography of magnesium alloy (Mg alloy) combining site.
Embodiment
Below in conjunction with embodiment content of the present invention is done further to replenish and explanation.In the narration process of embodiment,, something in common has been made necessary omission for to avoid too much repetition.
Embodiment 1:
Coating process of the present invention divides following three steps:
(1) preparation of powder.Adopting the supersonic atomization device that the spray of 5wt%Al-95wt%Zn alloy is become granularity is 25～75 microns micro mist, collects also screening back bottling;
(2) spraying pre-treatment.
A, to get granularity be 25～75 microns aluminium zinc powder, places oven dry in the vacuum drying oven, removes moisture;
B, the magnesium alloy base material is soaked oil removing, shot blasting on surface roughening treatment through acetone, again with the base material preheating;
(3) spraying protective layer.Aluminium zinc powder that drying is good is put in the powder feeder, and substrate component is fixed on (common 5～40mm) locate, and open gas heater earlier, and high pressure gas are ejected into substrate surface after heating, pre-hot substrate apart from the nozzle certain distance.About 150 ℃ of temperature; Open the powder feeder then, carrying gas entrainment aluminium zinc powder and heated air are converged by superonic flow nozzzle and are arrived substrate surface with the air spraying of 1.5MPa, this moment, temperature rose to 400 ℃ gradually by 150 ℃, form the aluminium zinc protective coating at Mg alloy surface, and then shut-down operation when making temperature be adjusted downward to 150 ℃ by 400 ℃, slow cooling to room temperature is taken out component again.
Embodiment 2:
(1) preparation of powder.Adopting the laser evaporation method that the 30wt%Al-70wt%Zn alloy is made granularity is 25～75 microns micro mist, collects also screening back bottling;
(2) spraying pre-treatment.
A, to get granularity be 25～75 microns aluminium zinc powder, places oven dry in the vacuum drying oven, removes moisture;
B, the magnesium alloy component are deoiled through alcohol-pickled, the surface sand-blasting roughening treatment is again with the base material preheating;
(3), spraying protective layer.The aluminium zinc powder that drying is good is packed in the powder feeder, and component are fixed on apart from nozzle 10mm place, open gas heater preheating component earlier, and then open the powder feeder, this moment, supersonic nozzle just can form aluminium zinc protective coating in Mg alloy surface to the substrate surface of component with powder high-velocity spray under the pressure of 2.5MPa by jet effect under 150～400 ℃ temperature.
Embodiment 3:
(1) preparation of powder.Adopting the supersonic atomization device that the 15wt%Al-85wt%Zn alloy is made granularity is 25～75 microns micro mist, collects also screening back bottling;
(2) spraying pre-treatment.
A, to get granularity be 25～75 microns aluminium zinc powder, places oven dry in the vacuum drying oven, removes moisture;
B, with the magnesium alloy component with acetone or alcohol-pickled deoiling, surface shot blasting strengthening and roughening treatment.
(3) spraying protective layer.The aluminium zinc micropowder that drying is good is packed in the powder feeder, and the base material component are fixed on apart from nozzle 30mm place, open gas heater preheating component to 150 ℃ earlier, and then open powder feeder and nozzle switch, this moment is under the pressure of 2.0MPa, superonic flow nozzzle just can spray to micro mist on the surface of component by means of jet effect, this moment, injection temperature was 150-400-150 ℃, on the magnesium alloy component surface, just can form be evenly distributed, the aluminium zinc protective layer of compact structure and excellent performance.
Adopt the not only made magnesium alloy surface protective layer excellent performance of technology of the present invention, but also it is thin to have solved the protective film that occurs in the known technology, problems such as Mg alloy surface oxidation and contaminate environment, its technique effect are to be worth sure, can produce good social benefit and economic benefit.
Claims (2)
1. the spraying coating process of a magnesium alloy surface protective layer is characterized in that the aluminium zinc micro mist makes raw material with the cold spray process moulding, wherein the composition of aluminium zinc micro mist by weight percentage ratio calculate: aluminium 5～30; Zinc 95～70, the micro mist granularity is 25～75 microns, cold spray process comprises:
(1) with base material with acetone or alcohol-pickled oil removing, shot-peening, preheating;
(2) with the rapid condensation method prepare aluminium zinc micro mist, screening, dry bottling is standby;
(3) be 150～400 ℃ in temperature, pressure is to spray under the condition of 1.5～2.5MPa.
2. by the spraying coating process of the described magnesium alloy surface protective layer of claim 1, it is characterized in that said rapid condensation method prepares micro mist supersonic gas atomization manufacturing; Or use the laser evaporation manufactured.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100459846A CN100406614C (en) | 2005-03-09 | 2005-03-09 | Spray coating technology of magnesium alloy surface protective layer |
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| CNB2005100459846A CN100406614C (en) | 2005-03-09 | 2005-03-09 | Spray coating technology of magnesium alloy surface protective layer |
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| CN1651605A CN1651605A (en) | 2005-08-10 |
| CN100406614C true CN100406614C (en) | 2008-07-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602082A (en) * | 2012-03-22 | 2012-07-25 | 山东电力工程咨询院有限公司 | Anti-corrosion biomass energy generating flue, flue gas waste heat recovery device and preparation method of the anti-corrosion biomass energy |
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| DE102006037532A1 (en) * | 2006-08-10 | 2008-02-14 | Siemens Ag | Method for producing an electrical functional layer on a surface of a substrate |
| CN102154639B (en) * | 2011-03-10 | 2012-11-28 | 上海交通大学 | Aluminum-particle-based method for preparing coating by cold spray deposition |
| CN102154640B (en) * | 2011-03-16 | 2012-10-31 | 上海交通大学 | Method for enhancing bonding strength of aluminum coating |
| US8703234B2 (en) * | 2011-07-27 | 2014-04-22 | GM Global Technology Operations LLC | Cold sprayed and heat treated coating for magnesium |
| CN104946930B (en) * | 2014-03-28 | 2017-10-31 | 宝山钢铁股份有限公司 | A kind of uniform composite structure zinc-aluminium protective coating and its manufacture method |
| CN104988492A (en) * | 2015-07-22 | 2015-10-21 | 中国兵器科学研究院宁波分院 | Preparation method of corrosion resistant coating layer on surface of magnesium alloy component |
| CN108085673B (en) * | 2016-11-22 | 2020-01-03 | 佛山市顺德区美的电热电器制造有限公司 | Preparation method of cookware with cold spraying magnetic conductive coating |
| EP3587621B1 (en) | 2017-02-24 | 2021-12-15 | National Institute for Materials Science | Method for manufacturing aluminum circuit board |
| 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 |
| CN107675163A (en) * | 2017-11-14 | 2018-02-09 | 北京科技大学 | The method that the pure zinc of Mg alloy surface/Zinc alloy coated is prepared based on cold spray technique |
| CN107974681A (en) * | 2017-11-29 | 2018-05-01 | 北京石油化工学院 | A kind of method for improving cold spray layer corrosion resistance |
| CN114250459A (en) * | 2021-12-23 | 2022-03-29 | 浙江工业大学 | Method for supersonic laser deposition micro shot blasting and spraying device |
| CN115747573B (en) * | 2022-12-08 | 2024-02-13 | 季华实验室 | Cold spraying zinc alloy powder, coating and preparation method thereof |
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| JPH0790462A (en) * | 1993-09-27 | 1995-04-04 | Takeshi Masumoto | High strength magnesium alloy and its production |
| JPH11302867A (en) * | 1998-04-23 | 1999-11-02 | Saito Kogyo:Kk | Surface treatment of magnesium based material |
| CN1396298A (en) * | 2002-07-01 | 2003-02-12 | 西安建筑科技大学 | Surface alloying process of Mg or Mg-alloy product by heating and solid diffusion in furnace |
| CN1397664A (en) * | 2002-06-24 | 2003-02-19 | 西安交通大学 | Induction heating method for alloying surface of Mg alloy |
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2005
- 2005-03-09 CN CNB2005100459846A patent/CN100406614C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0790462A (en) * | 1993-09-27 | 1995-04-04 | Takeshi Masumoto | High strength magnesium alloy and its production |
| JPH11302867A (en) * | 1998-04-23 | 1999-11-02 | Saito Kogyo:Kk | Surface treatment of magnesium based material |
| CN1397664A (en) * | 2002-06-24 | 2003-02-19 | 西安交通大学 | Induction heating method for alloying surface of Mg alloy |
| CN1396298A (en) * | 2002-07-01 | 2003-02-12 | 西安建筑科技大学 | Surface alloying process of Mg or Mg-alloy product by heating and solid diffusion in furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602082A (en) * | 2012-03-22 | 2012-07-25 | 山东电力工程咨询院有限公司 | Anti-corrosion biomass energy generating flue, flue gas waste heat recovery device and preparation method of the anti-corrosion biomass energy |
| CN102602082B (en) * | 2012-03-22 | 2014-09-03 | 山东电力工程咨询院有限公司 | Anti-corrosion biomass energy generating flue, flue gas waste heat recovery device and preparation method of the anti-corrosion biomass energy |
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| CN1651605A (en) | 2005-08-10 |
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