CN103014708A - Single crystal blade surface grain etching method - Google Patents
Single crystal blade surface grain etching method Download PDFInfo
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- CN103014708A CN103014708A CN2011102807524A CN201110280752A CN103014708A CN 103014708 A CN103014708 A CN 103014708A CN 2011102807524 A CN2011102807524 A CN 2011102807524A CN 201110280752 A CN201110280752 A CN 201110280752A CN 103014708 A CN103014708 A CN 103014708A
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Abstract
The present invention provides a single crystal blade surface grain etching method, which is characterized in that a mixing liquid of hydrogen peroxide and hydrochloric acid is adopted as an etching solution to etch a single crystal blade in a short time. The single crystal blade surface grain etching method has advantages of convenience, safety, reliability, environmental protection and the like. According to the present invention, with the reasonable ratio of the prepared etching solution, etching can be quickly and efficiently performed on the single crystal blade surface, such that labor intensity is reduced, production efficiency is increased, exhaust pollution on the environment is effectively reduced, and substantial social benefits and significant economic benefits are expected to be generated.
Description
Technical field
The present invention relates to the aero engine turbine blades manufacturing technology, specifically relate to a kind of method of single crystal blade surface microstructure corrosion.
Background technology
Aero engine turbine blades mostly is equiax crystal, directional columnargrain blade at present, generally adopt copper sulfate etch, iron trichloride etch corrosion blade surface crystal grain, because equiax crystal, directional columnargrain blade exist crystal boundary, adopt copper sulfate, iron trichloride etching process method, the surface microstructure corrosive effect is fine, and can demonstrate clearly the surface structure of blade.
Along with the update of advanced aero engine, the application of single crystal blade in turibine rotor is more and more extensive.Because single crystal blade does not have crystal boundary, adopt common etching process method, as: copper sulfate, iron trichloride etching process method, can't corrode fast and effectively the single crystal blade surface.The crystal grain defective on single crystal blade surface, as: subgrain boundary, recrystallize, equiax crystal, freckle, stray crystal etc., if can not check out by the method for surface microstructure corrosion, use in case drop into installation, its hazardness is very large, serious meeting causes the engine accident.Therefore, the method that need to develop a kind of convenient, safe, reliable, environmentally friendly and suitable single crystal blade surface microstructure corrosion is imperative.
Summary of the invention
The object of the invention provides a kind of method of single crystal blade surface microstructure corrosion.Specifically adopt the mixed solution of hydrogen peroxide and hydrochloric acid at short notice single crystal blade to be corroded.
The invention provides a kind of single crystal blade surface microstructure caustic solution, it is characterized in that: the mixed solution with hydrogen peroxide and hydrochloric acid corrodes single crystal blade at short notice as corrosive fluid.
The invention provides a kind of single crystal blade surface microstructure caustic solution, it is characterized in that: the volume ratio of described hydrogen peroxide and hydrochloric acid soln is (2.5 ~ 3.0): 10.
The invention provides a kind of single crystal blade surface microstructure caustic solution, it is characterized in that: described etching time is 40s ~ 60s.
The invention provides a kind of single crystal blade surface microstructure caustic solution, it is characterized in that: described method can be applicable to the corrosion of all single crystal superalloy blades surface microstructures
The invention provides a kind of employing hydrogen peroxide and hydrochloric acid mixed solution corrodes the single crystal blade surface microstructure, if when the proportioning of hydrogen peroxide is lower than 2.5, then the single crystal blade surface corrosion is very difficult, usually need to corrode repeatedly surface microstructure could see clearly reluctantly, this has not only strengthened labour intensity, also causes the waste of resource and the pollution of environment; If when the proportioning of hydrogen peroxide is 2.5, then can corrode single crystal blade at short notice, can access clearly surface microstructure tissue of blade, and can not cause excessive erosion, the damaged blade surface; If having served as the proportioning of hydrogen peroxide is 3.0 o'clock, also can corrode single crystal blade at short notice, and can access clearly surface microstructure tissue of blade, can not cause excessive erosion, the damaged blade surface; If when the proportioning of hydrogen peroxide greater than 3.0 and less than 3.5 the time, then can corrode single crystal blade at short notice, also can access clearly surface microstructure tissue of blade, but can cause the excessive erosion injury to blade surface, cause simultaneously the wasting of resources and environmental pollution; If when the proportioning of hydrogen peroxide greater than 3.5 the time, also can corrode single crystal blade at short notice, but the excessive erosion meeting causes serious injury blade.In follow-up check, can produce fluorescence display such as the surface when the fluorescent inspection, when blade surface has fluorescence display, need to throw and repair, polish, need excessive throwing to repair, polish when fluorescence display is serious, will cause the blade local size overproof, even scrap, cause simultaneously the larger wasting of resources and environmental pollution.
The method of a kind of single crystal blade surface microstructure corrosion provided by the invention, the development initial stage, through certain machine monocrystalline low-pressure turbine working-blade development test examination, corrosion single crystal blade more than 800 sheets, with 1000 yuan of calculating of the every creation of value, create 800,000 yuan of economic worths, this technology can satisfy the development and production needs of this blade.After the single crystal blade small serial production, can be at least the new output value that company increases 5,000,000 yuan of wounds every year.
Obnoxious flavour, waste liquid that the present invention produces in the process of corrosion, whole corrosion process has been taked to carry out in closed environment, and waste gas, waste liquid is passed in the alkali lye of sodium hydroxide and potassium hydroxide, has reached the purpose of environmental protection.
The present invention has the advantages such as convenient, safe, reliable, environmentally friendly, proportioning by the reasonable preparation corrosive fluid, can fast and effeciently corrode the single crystal blade surface microstructure, when reducing labour intensity and enhancing productivity, more effectively reduce the pollution of waste gas to environment, be expected to produce huge social benefit and significant economic benefit.
Description of drawings
Fig. 1 is single crystal blade surface microstructure etching process.
Embodiment
Give further instruction below by embodiment to the present invention, certainly, the present invention is not limited only to following embodiment.
Embodiment 1 DD5 single crystal superalloy blades surface microstructure caustic solution.
24 DD5 single crystal superalloy blades that will corrode fitly lie in the etching tank, and etching tank is placed in the stink cupboard, opens the vacuum fan exhausting.First 5L hydrochloric acid is poured in the etching tank, hydrochloric acid will be not be crossed the blade that put, pours in the etching tank the 1.5L hydrogen peroxide of volume ratio 10:3 ratio is disposable again, shuts the door beginning timing of stink cupboard and observes corrosion phenomenon.During beginning corrosive fluid just with DD5 single crystal blade vigorous reaction, and produce a large amount of bubbles, the yellowish green chlorine of overflowing, after 40s～60s corrosion, the interior bubble of etching tank fades away and emerges a large amount of white cigarettes, open immediately the water tap of etching tank top this moment toward the interior water filling of etching tank, water injection time is 3 ~ 5min.The goalkeeper's etching tank that can open stink cupboard after white cigarette in stink cupboard is drained only takes out.With brush the dirt settling of blade surface is scrubbed clean and rear single crystal blade crystal grain to be checked.Waste gas, the waste liquid that produces in the corrosion process imported to the rear discharge that neutralizes in the aqueous alkali that is added with acid base indicator.
When hydrogen peroxide and hydrochloric acid mixed in the ratio of 3:10, corrosive fluid can corrode single crystal blade at short notice, can access clearly surface microstructure tissue of blade, and can not cause excessive erosion, and is can damaged blade surperficial.
Embodiment 2 DD6 single crystal superalloy blades surface microstructure caustic solutions.
24 DD6 single crystal superalloy blades that will corrode fitly lie in the etching tank, and etching tank is placed in the stink cupboard, opens the vacuum fan exhausting.5 L hydrochloric acid are poured in the etching tank, and hydrochloric acid will not crossed the blade of putting, and again with disposable the pouring in the etching tank of 1.25 L hydrogen peroxide of 10:2.5 ratio, shuts the door beginning timing of stink cupboard and observes corrosion phenomenon.During beginning corrosive fluid just with the single crystal blade vigorous reaction, and produce a large amount of bubbles, the yellowish green chlorine of overflowing, after 40s～60s corrosion, the interior bubble of etching tank fades away and emerges a large amount of white cigarettes, open immediately the water tap of etching tank top this moment toward the interior water filling of etching tank, water injection time is 3 ~ 5min.The goalkeeper's etching tank that can open stink cupboard after white cigarette in stink cupboard is drained only takes out.With brush the dirt settling of blade surface is scrubbed clean and rear single crystal blade crystal grain to be checked.Waste gas, the waste liquid that produces in the corrosion process imported to the rear discharge that neutralizes in the aqueous alkali that is added with acid base indicator.
When hydrogen peroxide and hydrochloric acid mixed in the ratio of 1:4, corrosive fluid can corrode single crystal blade at short notice, can access clearly surface microstructure tissue of blade, and can not cause excessive erosion, and is can damaged blade surperficial.
Comparative Examples 1 DD5 single crystal superalloy blades surface microstructure caustic solution.
24 DD5 single crystal superalloy blades that will corrode fitly lie in the etching tank, and etching tank is placed in the stink cupboard, opens the vacuum fan exhausting.First 5L hydrochloric acid is poured in the etching tank, hydrochloric acid will not crossed the blade of putting, and again with disposable the pouring in the etching tank of 1 L hydrogen peroxide of 5:1 ratio, shuts the door beginning timing of stink cupboard and observes corrosion phenomenon.During beginning corrosive fluid just with the single crystal blade vigorous reaction, and produce a large amount of bubbles, the yellowish green chlorine of overflowing, after 40s～60s corrosion, the interior bubble of etching tank fades away and emerges a large amount of white cigarettes, open immediately the water tap of etching tank top this moment toward the interior water filling of etching tank, water injection time is 3 ~ 5min.The goalkeeper's etching tank that can open stink cupboard after white cigarette in stink cupboard is drained only takes out.With brush the dirt settling of blade surface is scrubbed clean and rear single crystal blade crystal grain to be checked.Waste gas, the waste liquid that produces in the corrosion process imported to the rear discharge that neutralizes in the aqueous alkali that is added with acid base indicator.
When the proportioning of hydrogen peroxide and hydrochloric acid is 1:5, single crystal blade surface corrosion difficulty, usually need to corrode repeatedly surface microstructure could see clearly reluctantly, and this has not only strengthened labour intensity, also causes the waste of resource and the pollution of environment.
Comparative Examples 2 DD6 single crystal superalloy blades surface microstructure caustic solutions.
24 DD6 single crystal superalloy blades that will corrode fitly lie in the etching tank, and etching tank is placed in the stink cupboard, opens the vacuum fan exhausting.First 5 L hydrochloric acid are poured in the etching tank, hydrochloric acid need be not be crossed the blade that put, pours in the etching tank the 1.6L hydrogen peroxide of 10:3.2 ratio is disposable again, shuts the door beginning timing of stink cupboard and observes corrosion phenomenon.During beginning corrosive fluid just with the single crystal blade vigorous reaction, and produce a large amount of bubbles, the yellowish green chlorine of overflowing, after 40s～60s corrosion, the interior bubble of etching tank fades away and emerges a large amount of white cigarettes, open immediately the water tap of etching tank top this moment toward the interior water filling of etching tank, water injection time is 3 ~ 5min.The goalkeeper's etching tank that can open stink cupboard after white cigarette in stink cupboard is drained only takes out.With brush the dirt settling of blade surface is scrubbed clean and rear single crystal blade crystal grain to be checked.Waste gas, the waste liquid that produces in the corrosion process imported to the rear discharge that neutralizes in the aqueous alkali that is added with acid base indicator.
When the proportioning of hydrogen peroxide and hydrochloric acid is 3.2:10, can corrode single crystal blade at short notice, also can access clearly surface microstructure tissue of blade, but can cause the excessive erosion injury to blade surface, cause simultaneously the wasting of resources and environmental pollution.
Comparative Examples 3 DD6 single crystal superalloy blades surface microstructure caustic solutions.
24 DD6 single crystal superalloy blades that will corrode fitly lie in the etching tank, and etching tank is placed in the stink cupboard, opens the vacuum fan exhausting.5 L hydrochloric acid are poured in the etching tank, and hydrochloric acid need not crossed the blade of putting, and again with disposable the pouring in the etching tank of 2 L hydrogen peroxide of 2.5:1 ratio, shuts the door beginning timing of stink cupboard and observes corrosion phenomenon.During beginning corrosive fluid just with the single crystal blade vigorous reaction, and produce a large amount of bubbles, the yellowish green chlorine of overflowing, after 40s～60s corrosion, the interior bubble of etching tank fades away and emerges a large amount of white cigarettes, open immediately the water tap of etching tank top this moment toward the interior water filling of etching tank, water injection time is 3 ~ 5min.The goalkeeper's etching tank that can open stink cupboard after white cigarette in stink cupboard is drained only takes out.With brush the dirt settling of blade surface is scrubbed clean and rear single crystal blade crystal grain to be checked.Waste gas, the waste liquid that produces in the corrosion process imported to the rear discharge that neutralizes in the aqueous alkali that is added with acid base indicator.
When the proportioning of hydrogen peroxide and hydrochloric acid is 1:2.5, can corrode single crystal blade at short notice, but can produce the excessive erosion phenomenon, the excessive erosion meeting causes serious injury blade, and can produce fluorescence display when follow-up surface fluorescence check, needs this moment to throw to repair, polish, need excessive throwing to repair, polish when fluorescence display is serious, can cause like this blade local size overproof, even scrap, cause simultaneously the larger wasting of resources and environmental pollution.
Comparative Examples 4 DD5 single crystal superalloy blades surface microstructure caustic solutions.
24 DD5 single crystal superalloy blades that will corrode fitly lie in the etching tank, and etching tank is placed in the stink cupboard, opens the vacuum fan exhausting.5 L hydrochloric acid are poured in the etching tank, and hydrochloric acid will not crossed the blade of putting, and again with disposable the pouring in the etching tank of 1.25 L hydrogen peroxide of 10:2.5 ratio, shuts the door beginning timing of stink cupboard and observes corrosion phenomenon.During beginning corrosive fluid just with the single crystal blade vigorous reaction, and produce a large amount of bubbles, the yellowish green chlorine of overflowing, after 20s～35s corrosion, still have a large amount of bubbles in the etching tank, open immediately the water tap of etching tank top this moment toward the interior water filling of etching tank, water injection time is 3 ~ 5min.The goalkeeper's etching tank that can open stink cupboard after white cigarette in stink cupboard is drained only takes out.With brush the dirt settling of blade surface is scrubbed clean and rear single crystal blade crystal grain to be checked.Waste gas, the waste liquid that produces in the corrosion process imported to the rear discharge that neutralizes in the aqueous alkali that is added with acid base indicator.
When the proportioning of hydrogen peroxide and hydrochloric acid is 1:4, after 20s ~ 35s corrosion, find that the corrosion of single crystal blade surface microstructure is imperfect, do not reach good extent of corrosion, might cause blade to be scrapped, cause the wasting of resources and environmental pollution.
Comparative Examples 5 DD6 single crystal superalloy blades surface microstructure caustic solutions.
24 DD6 single crystal superalloy blades that will corrode fitly lie in the etching tank, and etching tank is placed in the stink cupboard, opens the vacuum fan exhausting.First 5L hydrochloric acid is poured in the etching tank, hydrochloric acid will be not be crossed the blade that put, pours in the etching tank the 1.5L hydrogen peroxide of volume ratio 10:3 ratio is disposable again, shuts the door beginning timing of stink cupboard and observes corrosion phenomenon.During beginning corrosive fluid just with DD6 single crystal blade vigorous reaction, and produce a large amount of bubbles, the yellowish green chlorine of overflowing, after 65s～90s corrosion, the interior bubble of etching tank fades away and emerges a large amount of white cigarettes, open immediately the water tap of etching tank top this moment toward the interior water filling of etching tank, water injection time is 3 ~ 5min.The goalkeeper's etching tank that can open stink cupboard after white cigarette in stink cupboard is drained only takes out.With brush the dirt settling of blade surface is scrubbed clean and rear single crystal blade crystal grain to be checked.Waste gas, the waste liquid that produces in the corrosion process imported to the rear discharge that neutralizes in the aqueous alkali that is added with acid base indicator.
When hydrogen peroxide and hydrochloric acid mix in the ratio of 3:10, after 65s～90s corrosion, find that single crystal blade surface microstructure excessive erosion phenomenon is serious, can form one deck black dirt settling at blade surface, be difficult to scrub clean with the dirt settling of brush with blade surface, do not reach good corrosive effect, might cause blade to be scrapped, cause the wasting of resources and environmental pollution when increasing labour intensity.
Claims (4)
1. single crystal blade surface microstructure caustic solution, it is characterized in that: the mixed solution with hydrogen peroxide and hydrochloric acid corrodes single crystal blade at short notice as corrosive fluid.
2. according to single crystal blade surface microstructure caustic solution claimed in claim 1, it is characterized in that: the volume ratio of described hydrogen peroxide and hydrochloric acid soln is (2.5 ~ 3.0): 10.
3. according to single crystal blade surface microstructure caustic solution claimed in claim 1, it is characterized in that: described etching time is 40s ~ 60s.
4. according to single crystal blade surface microstructure caustic solution claimed in claim 1, it is characterized in that: described method can be applicable to the corrosion of all single crystal superalloy blades surface microstructures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102807524A CN103014708A (en) | 2011-09-21 | 2011-09-21 | Single crystal blade surface grain etching method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102807524A CN103014708A (en) | 2011-09-21 | 2011-09-21 | Single crystal blade surface grain etching method |
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| CN103014708A true CN103014708A (en) | 2013-04-03 |
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| CN2011102807524A Pending CN103014708A (en) | 2011-09-21 | 2011-09-21 | Single crystal blade surface grain etching method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245549A (en) * | 2013-05-10 | 2013-08-14 | 西安航空动力股份有限公司 | Grain size corrosion device of single crystal blade |
| CN107557869A (en) * | 2017-08-15 | 2018-01-09 | 中国航发北京航空材料研究院 | The method for avoiding single crystal super alloy turbo blade platinum filament stud position from recrystallizing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1267904A (en) * | 1999-03-15 | 2000-09-27 | 日本电气株式会社 | Etching and cleaning method and using equipment for etching and cleaning |
| DE10237960A1 (en) * | 2002-01-30 | 2003-08-14 | Hans Schmidt | Demetallization of plastics parts, useful for recycling metals and plastics from e.g. chromium-plated parts in vehicles or consumer products, involves chemical etching to remove chromium, copper, nickel and optionally palladium |
| US20040242000A1 (en) * | 2000-12-20 | 2004-12-02 | Lg. Philips Lcd Co., Ltd. | Etchant and array substrate having copper lines etched by the etchant |
-
2011
- 2011-09-21 CN CN2011102807524A patent/CN103014708A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1267904A (en) * | 1999-03-15 | 2000-09-27 | 日本电气株式会社 | Etching and cleaning method and using equipment for etching and cleaning |
| US20040242000A1 (en) * | 2000-12-20 | 2004-12-02 | Lg. Philips Lcd Co., Ltd. | Etchant and array substrate having copper lines etched by the etchant |
| DE10237960A1 (en) * | 2002-01-30 | 2003-08-14 | Hans Schmidt | Demetallization of plastics parts, useful for recycling metals and plastics from e.g. chromium-plated parts in vehicles or consumer products, involves chemical etching to remove chromium, copper, nickel and optionally palladium |
Non-Patent Citations (3)
| Title |
|---|
| P. D. ZHEMANYUK ET AL: "EFFECT OF THE COMOSITION AND PROCESS PARAMETERS ON THE STRUCTURE AND PROPERTIES OF NICKEL ALLOYS", 《 METAL SCIENCE AND HEAT TREATMENT》 * |
| 孟杰等: "镍基单晶高温合金的再结晶", 《材料工程》 * |
| 张卫方等: "定向凝固合金叶片的裂纹与再结晶研究", 《机械强度》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245549A (en) * | 2013-05-10 | 2013-08-14 | 西安航空动力股份有限公司 | Grain size corrosion device of single crystal blade |
| CN103245549B (en) * | 2013-05-10 | 2014-12-24 | 西安航空动力股份有限公司 | Grain size corrosion device of single crystal blade |
| CN107557869A (en) * | 2017-08-15 | 2018-01-09 | 中国航发北京航空材料研究院 | The method for avoiding single crystal super alloy turbo blade platinum filament stud position from recrystallizing |
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Application publication date: 20130403 |