CN102661883B - Method for quickly preparing metallographic samples for AS7G03/AS8U3 aluminum alloy - Google Patents
Method for quickly preparing metallographic samples for AS7G03/AS8U3 aluminum alloy Download PDFInfo
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- CN102661883B CN102661883B CN201210120311.2A CN201210120311A CN102661883B CN 102661883 B CN102661883 B CN 102661883B CN 201210120311 A CN201210120311 A CN 201210120311A CN 102661883 B CN102661883 B CN 102661883B
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Abstract
The invention relates to a method for quickly preparing metallographic samples for AS7G03/AS8U3 aluminum alloy. In the method, two MC004-MPD-2W double-panel type metallographic grinding and polishing machines are used, NO.320 waterproof abrasive paper, NO.800 waterproof abrasive paper, NO800 metallographic abrasive paper and cashmere polishing cloth are respectively placed on four grinding and polishing discs, and the on-the-spot metallographic samples are quickly prepared by means of adjusting the rotation speed of each grinding and polishing machine. The on-the-spot metallographic samples are quickly prepared by means of adjusting the rotation speed of each grinding and polishing machine, an integral sample preparation process takes only 4-5 minutes, operation is simple and convenient, a contrast display effect is good, the method is easy to implement, repeatability is high, work efficiency can be improved by 4-5 times, cost is low, and the metallographic samples are particularly applicable to detecting metallographic structures of Al-Si alloy with modified Sb.
Description
Technical field
The invention belongs to non-ferrous metals casting field, relate to aluminium alloy metallographic specimen, especially a kind of preparation method of quick preparation AS7G03/AS8U3 aluminium alloy metallographic specimen.
Background technology
The performance of aluminium alloy depends on its composition and microstructure, and wherein microstructure is more direct on the impact of aluminium alloy capability.The measure of test material microstructure is a lot of at present, such as electron scanning Electronic Speculum, electronics perspective Electronic Speculum, electron probe, x-ray inspection and high power metaloscope etc., all can be used to the microstructure of test material, is that every kind of equipment and using method emphasize particularly on different fields to detected parameters.In aluminum alloy materials manufacturing, the microstructure of observing aluminium alloy with high power metaloscope especially modification effect is very general and effectively, engineering technical personnel can predict and judge the performance of metal by high power imaging is carried out to observation and analysis, and analyze the reason of various inefficacies and destruction, this detects process of analyzing and is commonly referred to metallographic examination.
The most important work of metallographic examination is to prepare metallographic specimen, improper if prepared by metallographic specimen, may occur illusion, thereby get the wrong sow by the ear, and therefore the quality of the preparation of metallographic specimen plays vital effect to metallographic detection and judgement.At present, along with the requirement of alloy product quality is more and more higher, the project of metal lographic examination and quantity are also more and more, are main paties in order to improve the work efficiency of conventional metal lographic examination in production, to prepare fast sample.In addition,, in order to enhance productivity, reduce iron loss, stokehold metallographic examination requires to obtain fast analysis result, but at present, Birmasil stokehold metallographic specimen was prepared slow, metallograph is unintelligible, and therefore the quick preparation of stokehold metallographic specimen is a problem demanding prompt solution.
By retrieval, not yet find the patent document relevant to present patent application.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, provide a kind of easy and simple to handle, contrast shows, easily implement and the preparation method of the high quick preparation AS7G03/AS8U3 aluminium alloy metallographic specimen of repeatability.
The object of the present invention is achieved like this:
A preparation method for quick preparation AS7G03/AS8U3 aluminium alloy metallographic specimen, comprises the steps:
(1) sampling: by the AS7G03/AS8U3 aluminium alloy ingots of stokehold cast, cutting into the length of side with metallographical cutter is the sample that 15～20mm, height are 40～50mm;
(2) grinding:
1. thorax is flat: adopt 320# silicon carbide paper, 300～600 revs/min of polished machine revolutions, first polish surrounding and wedge angle, then, along cutting trace vertical direction rubbing down, removes cutting trace, sample is made to a plane, 70～80 seconds grinding time;
2. corase grind: 800# silicon carbide paper, 300～500 revs/min of polished machine revolutions, along throwing trace vertical direction rubbing down, remove the thick trace of previous step, 15～25 seconds grinding time;
3. fine grinding: 800# abrasive paper for metallograph, 100～150 revs/min of polished machine revolutions, along throwing trace vertical direction rubbing down, remove corase grind trace, 25～35 seconds grinding time;
(3) polishing:
1. adjust 1000～1200 revs/min of polished machine rotating speeds, first use spraying brilliant polish spray cashmere surface, along thin trace vertical direction rubbing down, remove fine grinding trace in middle outside, then use abrasive pastes rubbing down, polishing time 100～120 seconds;
2. then adjust 400～500 revs/min of polished machine rotating speeds, at the light grind away product of centre circle or inner side, grind minute surface, gently consume time 15～20 seconds;
3. adjust 200～300 revs/min of polished machine rotating speeds, on polishing cloth, gently grind, remove blackspot or dirty, polishing time 5～10 seconds;
(4) corrode: the sample water after polishing is cleaned up, with dipping in spirituous absorbent cotton wiping polished surface 1～2 time, electricity consumption dries up, in the time having bubble to emerge, take out rapidly, with clear water flushing, then use anhydrous alcohol wiping, finally Metallographic Analysis of Semi on metaloscope, and take metallograph.
And electricity consumption needs to put into 5% HF acid and corrodes 10～20 seconds after drying up in described step (4).
Advantage of the present invention and beneficial effect are:
1, the present invention, by adjusting polished machine rotating speed, prepares stokehold metallographic specimen fast, and whole sample making course only needs 4～5min.This method is easy and simple to handle, and contrast shows, easily implement, and repeatability is high, and the metallographic structure that is particularly useful for the rotten Al-Si alloy of Sb detects.
2, the present invention can improve 4～5 times of work efficiency, and cost is low, brings convenience to metallographic worker and whole production run.
Brief description of the drawings
Fig. 1 is that the metallographic specimen of the AS7G03 prepared by the embodiment of the present invention 1 is organized photo (about 4min consuming time);
Fig. 2 is that the metallographic specimen of the AS8U3 prepared by the embodiment of the present invention 2 is organized photo (about 4min consuming time);
Fig. 3 is that the stokehold metallographic specimen of the AS7603 for preparing of traditional method for making sample is organized photo (about 12min consuming time);
Fig. 4 is that the stokehold metallographic specimen of the AS8U3 for preparing of traditional method for making sample is organized photo (about 12min consuming time).
Embodiment:
Describe embodiments of the invention in detail below in conjunction with accompanying drawing, it should be noted that, the present embodiment is narrative, is not determinate, can not limit protection scope of the present invention with this.
Principle of work of the present invention is according to Preston equation: R=KP
αv
β, there is very large correlativity with grinding and polishing pressure (P) and grinding and polishing rotating speed (V) in grinding and polishing quality (R), and K is the coefficient relevant with grinding and polishing medium.When one timing of grinding and polishing pressure, by adjusting grinding and polishing rotating speed, can reach the optimum efficiency of grinding and polishing quality.Each step of metallographic specimen grinding and polishing has best grinding and polishing rotating speed, ensures grinding and polishing quality and the speed of sample simultaneously, by great many of experiments, determines the present patent application of a kind of rotten aluminium alloy metallographic sample preparation of applicable Sb of optimum.Use two desk-top metallographical polishing machines of MC004-MPD-2W double plate, on four grinding and polishing dishes, put respectively 320# silicon carbide paper, 800# silicon carbide paper, 800# abrasive paper for metallograph and cashmere polishing cloth, by adjusting polished machine rotating speed, realize the quick preparation of stokehold metallographic specimen.
Concrete technical scheme is described by following two embodiment.
Embodiment 1:
A preparation method for quick preparation AS7G03 aluminium alloy metallographic specimen, step is:
1, sampling
By the AS7G03 aluminium alloy ingots of stokehold cast, cutting into the length of side with metallographical cutter is 18mm, and height is the sample of 45mm.
2, grinding
1) thorax is flat, 320# silicon carbide paper, and 400 revs/min, first polish surrounding and wedge angle, then, along cutting trace vertical direction rubbing down, remove cutting trace, sample is made to a plane, approximately 70 seconds consuming time;
2) corase grind, 800# silicon carbide paper,, along throwing trace vertical direction rubbing down, removes the thick trace of previous step, 20 seconds consuming time by 400 revs/min;
3) fine grinding, 800# abrasive paper for metallograph,, along throwing trace vertical direction rubbing down, removes corase grind trace, 30 seconds consuming time by 120 revs/min;
3, polishing
1) adjust 1000 revs/min of polished machine rotating speeds, first use spraying brilliant polish spray cashmere surface, along thin trace vertical direction rubbing down, remove fine grinding trace in middle outside, then use abrasive pastes rubbing down, polishing time is 100 seconds;
2) then adjust 400 revs/min of polished machine rotating speeds, at the light grind away product of centre circle, grind minute surface, approximately 18 seconds.
3) adjust 200 revs/min of polished machine rotating speeds, on polishing cloth, gently grind, remove blackspot or dirty, 5 seconds.
4, corrode
Sample water after polishing is cleaned up, and with dipping in spirituous absorbent cotton wiping polished surface 2 times, electricity consumption is put into 5% HF acid and is corroded after 15 seconds after drying up, and takes out rapidly, rinses with clear water, then uses anhydrous alcohol wiping.On XJG-05 Big Gold phase microscope, carry out Metallographic Analysis of Semi, and take metallograph.
Whole grinding and polishing process is lasted only 243 seconds, and the metallographic specimen surface grinding is without polishing scratch, pit, water mark.Referring to Fig. 1, metallograph is clear, and contrast is high, and modification effect is easily observed.
Embodiment 2:
A preparation method for quick preparation AS8U3 aluminium alloy metallographic specimen, step is:
1, sampling
By the AS8U3 aluminium alloy ingots of stokehold cast, cutting into the length of side with metallographical cutter is 16mm, and height is the sample of 42mm.
2, grinding
1) thorax is flat, 320# silicon carbide paper, and 600 revs/min, first polish surrounding and wedge angle, then, along cutting trace vertical direction rubbing down, remove cutting trace, sample is made to a plane, approximately 70 seconds consuming time;
2) corase grind, 800# silicon carbide paper,, along throwing trace vertical direction rubbing down, removes the thick trace of previous step, 18 seconds consuming time by 500 revs/min;
3) fine grinding, 800# abrasive paper for metallograph,, along throwing trace vertical direction rubbing down, removes corase grind trace, 30 seconds consuming time by 100 revs/min;
3, polishing
1) adjust 1200 revs/min of polished machine rotating speeds, first use spraying brilliant polish spray cashmere surface, along thin trace vertical direction rubbing down, remove fine grinding trace in middle outside, then use abrasive pastes rubbing down, polishing time is 100 seconds;
2) then adjust 500 revs/min of polished machine rotating speeds, at the light grind away product of centre circle, grind minute surface, approximately 18 seconds.
3) adjust 250 revs/min of polished machine rotating speeds, on polishing cloth, gently grind, remove blackspot or dirty, approximately 5 seconds.
4, corrode
Sample water after polishing is cleaned up, and with dipping in spirituous absorbent cotton wiping polished surface 2 times, electricity consumption is put into 5% HF acid while corroding 18 seconds after drying up, and takes out rapidly, rinses with clear water, then uses anhydrous alcohol wiping.On XJG-05 Big Gold phase microscope, carry out Metallographic Analysis of Semi, and take metallograph.
Whole grinding and polishing process is lasted only 241 seconds, and the metallographic specimen surface grinding is without polishing scratch, pit, water mark.Referring to Fig. 2, metallograph is clear, and contrast is high, and modification effect is easily observed.
Claims (1)
1. a preparation method who prepares fast AS7G03/AS8U3 aluminium alloy metallographic specimen, is characterized in that: comprise the steps:
(1) sampling: by the AS7G03/AS8U3 aluminium alloy ingots of stokehold cast, cutting into the length of side with metallographical cutter is the sample that 15～20mm, height are 40～50mm;
(2) grinding:
1. thorax is flat: adopt 320# silicon carbide paper, 300～600 revs/min of polished machine revolutions, first polish surrounding and wedge angle, then, along cutting trace vertical direction rubbing down, removes cutting trace, sample is made to a plane, 70～80 seconds grinding time;
2. corase grind: 800# silicon carbide paper, 300～500 revs/min of polished machine revolutions, along throwing trace vertical direction rubbing down, remove the thick trace of previous step, 15～25 seconds grinding time;
3. fine grinding: 800# abrasive paper for metallograph, 100～150 revs/min of polished machine revolutions, along throwing trace vertical direction rubbing down, remove corase grind trace, 25～35 seconds grinding time;
(3) polishing:
1. adjust 1000～1200 revs/min of polished machine rotating speeds, first use spraying brilliant polish spray cashmere surface, along thin trace vertical direction rubbing down, remove fine grinding trace in middle outside, then use abrasive pastes rubbing down, polishing time 100～120 seconds;
2. then adjust 400～500 revs/min of polished machine rotating speeds, at the light grind away product of centre circle or inner side, grind minute surface, gently consume time 15～20 seconds;
3. adjust 200～300 revs/min of polished machine rotating speeds, on polishing cloth, gently grind, remove blackspot or dirty, polishing time 5～10 seconds;
(4) corrode: the sample water after polishing is cleaned up, with dipping in spirituous absorbent cotton wiping polished surface 1～2 time, electricity consumption needs to put into 5% HF acid and corrodes 10～20 seconds after drying up, take out rapidly, rinse with clear water, then use anhydrous alcohol wiping, finally Metallographic Analysis of Semi on metaloscope, and take metallograph.
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| CN103308355A (en) * | 2012-11-12 | 2013-09-18 | 西安航空动力股份有限公司 | Metallographic test sample preparation method of aluminum-based ceramic mould core and silicon-based ceramic mould core |
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| CN107971910A (en) * | 2017-10-25 | 2018-05-01 | 中国电子科技集团公司第十六研究所 | A kind of mirror processing method for the square Dewar aluminium alloy plate of low-temperature receiver |
| CN108051464A (en) * | 2017-11-23 | 2018-05-18 | 中钢集团邢台机械轧辊有限公司 | The detection method of particle reinforced material in a kind of hypereutectoid steel |
| CN111122457A (en) * | 2019-12-30 | 2020-05-08 | 珠海凯利得新材料有限公司 | Method for testing internal segregation of aluminum-based composite material |
| CN113670686A (en) * | 2021-08-09 | 2021-11-19 | 海德鲁铝业(苏州)有限公司 | Preparation method for aluminum alloy metallographic specimen |
| CN115266259A (en) * | 2022-07-14 | 2022-11-01 | 山东裕航特种合金装备有限公司 | Method for rapidly preparing aluminum alloy metallographic sample |
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Effective date of registration: 20200525 Address after: 300457 No. 58, Tai Tai Road, west end of Binhai New Area, Tianjin Patentee after: Tianjin xinlizhong alloy Group Co., Ltd Address before: 300457 No. 58 Tai Thai Road, West Development Zone, Tianjin Binhai New Area Development Zone Patentee before: Tianjin Lizhong Alloy Group Co.,Ltd. |