CN110453222A - Show the corrosive liquid and preparation method and application of super-high strength steel austenite grain boundary - Google Patents
Show the corrosive liquid and preparation method and application of super-high strength steel austenite grain boundary Download PDFInfo
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Abstract
The invention belongs to unimach austenite grain boundary and transgranular microstructure field of display technology, disclose a kind of corrosive liquid and preparation method and application for showing super-high strength steel austenite grain boundary, which includes following components: glacial acetic acid, dehydrated alcohol；Wherein, the volume ratio of glacial acetic acid and dehydrated alcohol are as follows: 1:3-7.The corrosive liquid and preparation method and application of display super-high strength steel austenite grain boundary provided by the invention cannot get the technical problems such as relatively clear corrosive effect to solve corrosive liquid formulation temperature in the prior art and etching time difficulty control.
Description
Technical field
The invention belongs to unimach austenite grain boundary and transgranular microstructure field of display technology, specifically one
The corrosive liquid and preparation method and application of kind display super-high strength steel austenite grain boundary.
Background technique
Super-high strength steel is generally acknowledged that its tensile strength not less than 1000MPa, due to the intensity of its superelevation, hardness and good
Toughness, applied to the structural member and workpiece for manufacturing all kinds of receiving higher stress.According to alloying level and microscopic structure, superelevation is strong
Degree steel can be divided into low-alloy, middle alloy and High-alloy Ultra-high Strength Steel three classes.There is martensite again in High-alloy Ultra-high Strength Steel
Aged steel and precipitation-hardening stainless steel etc..Microstructure under the conditions of 20 DEG C of room temperature of super-high strength steel is mainly martensite, bayesian
Body and austenite, one of or many of be composed.The volume ratio of the above microstructure is no less than 90%.Superelevation is strong
The size for spending steel austenite grain size is larger to microstructure morphology influence at room temperature, and display technology seems to Guan Chong
It wants.Numerous researchers have carried out the research of austenite grain boundary corrosive agent and caustic solution, are summarized as follows:
1, above most of reagent and method are mainly using saturation picric acid solution, detergent, copper sulphate, hydrofluoric acid, salt
Acid, dimethylbenzene etc. are used as paramedicines.Its each component ratio content, corrosion temperature and etching time are different.It corrodes examination
Agent and method are effective only for special component steel grade；
2, above most of corrosion night contains frohde test solution.Since picric acid has the dangerization such as toxicity and explosivity special
Property, picric acid and its primary formulation be put into newest " hazardous chemical catalogue (2015 editions) ", No. CAS be 88-89-1,
3324-58-1,131-74-8,146-84-9,131-74-8, more difficult purchase and acquisition in usual experimentation.It is badly in need of invention not
Containing picric austenite grain boundary corrosive agent；
3, above section caustic solution needs to heat in corrosion process, the microstructure applicability sensitive to portion temperature
Difference and need additionally to heat, increase the difficulty and cost of austenite display operation；
4, for the super-high strength steel studied of the present invention, due in unimach room temperature microstructure bainite and horse
Family name's body is body-centered cubic crystal structure, and retained austenite is towards the cubic crystal structure, " corruption of the crystal structure of the two type
Lose activation energy " it is different, common corrosive liquid is unable to get its austenite grain boundary on the market at present, can only obtain its transgranular bayesian
Body and martensitic microstructure, the performance for being not easy to the super-high strength steel studied the present invention judge.
Summary of the invention
The technical issues of in order to solve in the presence of above-mentioned background technique, there are three purposes by the present invention: purpose one is to provide
A kind of corrosive liquid showing super-high strength steel austenite grain boundary；Purpose two is to provide a kind of corruption for showing super-high strength steel austenite grain boundary
Lose the preparation method of liquid；Purpose three is to provide a kind of application of corrosive liquid for showing super-high strength steel austenite grain boundary, to solve
The technical problems existing in the prior art.
In order to achieve the above object, the invention adopts the following technical scheme: a kind of display super-high strength steel austenite grain boundary
Corrosive liquid, which includes following components: glacial acetic acid, dehydrated alcohol；Wherein, the volume ratio of glacial acetic acid and dehydrated alcohol are as follows:
1:3-7.
Further, which includes following components: glacial acetic acid, dehydrated alcohol；Wherein, glacial acetic acid and dehydrated alcohol
Volume ratio are as follows: 1:3.
Further, which includes following components: glacial acetic acid, dehydrated alcohol；Wherein, glacial acetic acid and dehydrated alcohol
Volume ratio are as follows: 1:5.
Further, which includes following components: glacial acetic acid, dehydrated alcohol；Wherein, glacial acetic acid and dehydrated alcohol
Volume ratio are as follows: 1:7.
Further, the alloying component percentage of the super-high strength steel are as follows: C:0.15-0.25%, Si:1.5-
2.0%, Mn:1.0-1.9%, P :≤0.1%, S :≤0.1%, Al:0.1-0.2%, Nb+V+Ti+Cr+Mo+B :≤2.6%,
Remaining is Fe.
A kind of preparation method for the corrosive liquid showing super-high strength steel austenite grain boundary, includes the following steps:
S1, glacial acetic acid is taken to be placed in a beaker；
S2, it takes dehydrated alcohol to pour into the beaker of addition glacial acetic acid of step S1, is mixed, shown with glacial acetic acid
The corrosive liquid of super-high strength steel austenite grain boundary.
A kind of application for the corrosive liquid showing super-high strength steel austenite grain boundary, the corrosive liquid is for showing super-high strength steel Ovshinsky
Body crystal boundary and transgranular bainite and martensite.
Further, the application method of the corrosive liquid includes the following steps:
S1, sample preparation: taking metallographic sample, embedding to metallographic sample progress hot insert, obtains metallographic specimen；
S2, grinding: it carries out the abrasive paper for metallograph of metallographic specimen obtained in step S1 or abrasive machine to be ground to surface scratch
Shallow and only one direction, the metallographic specimen after being ground；
S3, polishing: the metallographic specimen after the grinding is smeared into diamond polishing cream to corrosion surface, and in polishing machine
Upper selection carries out dry throwing perpendicular to the direction of scratch, until scratch carries out after almost eliminating plus water-wet is thrown, obtains the mirror surface of no marking；
S4, corrosion: the mirror surface of the no marking of the obtained metallographic specimen of step S3 being placed in up and is prepared in corrosive liquid,
10-40min is stood, corrosive environment temperature is 0 DEG C -40 DEG C；
S5, observation: the metallographic specimen in step S4 being taken out, washes with water erosional surface, then uses alcohol washes erosional surface, baking
After dry, observed.
The invention has the advantages that glacial acetic acid and dehydrated alcohol that the present invention selects all are common chemical reagent, itself
Toxicity is far smaller than picric acid, and buys conveniently, relatively convenient for the picric acid than buying all for example hazardous chemical reagents,
Reduce purchase difficulty；The corrosive liquid of display super-high strength steel austenite grain boundary provided by the invention can obtain more without temperature control
Clearly austenite grain boundary；Preparation method is simple, can be applied to show the super-high strength steel austenite grain boundary that the present invention studies；This
The corrosive liquid of invention cleverly utilize existing " corrosion activation energy " difference between the two the study found that in one controllable time
Interior, corrosive liquid can reach " the corrosion activation energy " of retained austenite, and " the corrosion activation energy " of bainite and martensite is not achieved,
Final bainite and martensite will not be shown, only clearly indicate austenite grain boundary.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the corrosion night of the embodiment of the present invention 1 to the original austenite metallographic microscope after super-high strength steel sample of the same race corrosion；
Fig. 2 is the corrosion night of the embodiment of the present invention 2 to the original austenite metallographic microscope after super-high strength steel sample of the same race corrosion；
Fig. 3 is the corrosion night of the embodiment of the present invention 3 to the original austenite metallographic microscope after super-high strength steel sample of the same race corrosion；
Fig. 4 is that the picrate acid distillation aqueous solution of comparative example 1 of the present invention corrodes super-high strength steel sample as corrosive agent
Original austenite metallographic microscope afterwards；
Fig. 5 is that 2 picric acid sea-gull board hair cream of comparative example of the present invention adds distilled water as corrosive agent to super-high strength steel sample
Original austenite metallographic microscope after corrosion.
Specific embodiment
The invention will be further described with specific embodiment with reference to the accompanying drawings of the specification:
Embodiment 1
The corrosive liquid of configuration display unimach austenite grain boundary:
S1,10ml glacial acetic acid is taken to be placed in a beaker；
S2, it takes 30ml dehydrated alcohol to pour into the beaker of addition glacial acetic acid of step S1, is mixed, obtained with glacial acetic acid
Show the corrosive liquid of super-high strength steel austenite grain boundary.
The application method of the corrosive liquid includes the following steps:
S1, sample preparation: taking metallographic sample, embedding to metallographic sample progress hot insert, obtains metallographic specimen；
S2, grinding: it carries out the abrasive paper for metallograph of metallographic specimen obtained in step S1 or abrasive machine to be ground to surface scratch
Shallow and only one direction, the metallographic specimen after being ground；
S3, polishing: the metallographic specimen after the grinding is smeared into diamond polishing cream to corrosion surface, and in polishing machine
Upper selection carries out dry throwing perpendicular to the direction of scratch, until scratch carries out after almost eliminating plus water-wet is thrown, obtains the mirror surface of no marking；
S4, corrosion: the mirror surface of the no marking of the obtained metallographic specimen of step S3 being placed in up and is prepared in corrosive liquid,
10min is stood, corrosive environment temperature is 0 DEG C；
S5, observation: the metallographic specimen in step S4 being taken out, washes with water erosional surface, then uses alcohol washes erosional surface, baking
After dry, observed.
Embodiment 2
The corrosive liquid of configuration display unimach austenite grain boundary:
S1,10ml glacial acetic acid is taken to be placed in a beaker；
S2, it takes 70ml dehydrated alcohol to pour into the beaker of addition glacial acetic acid of step S1, is mixed, obtained with glacial acetic acid
Show the corrosive liquid of super-high strength steel austenite grain boundary.
The application method of the corrosive liquid includes the following steps:
S1, sample preparation: taking metallographic sample, embedding to metallographic sample progress hot insert, obtains metallographic specimen；
S2, grinding: it carries out the abrasive paper for metallograph of metallographic specimen obtained in step S1 or abrasive machine to be ground to surface scratch
Shallow and only one direction, the metallographic specimen after being ground；
S3, polishing: the metallographic specimen after the grinding is smeared into diamond polishing cream to corrosion surface, and in polishing machine
Upper selection carries out dry throwing perpendicular to the direction of scratch, until scratch carries out after almost eliminating plus water-wet is thrown, obtains the mirror surface of no marking；
S4, corrosion: the mirror surface of the no marking of the obtained metallographic specimen of step S3 being placed in up and is prepared in corrosive liquid,
40min is stood, corrosive environment temperature is 40 DEG C；
S5, observation: the metallographic specimen in step S4 being taken out, washes with water erosional surface, then uses alcohol washes erosional surface, baking
After dry, observed.
Embodiment 3
The corrosive liquid of configuration display unimach austenite grain boundary:
S1,10ml glacial acetic acid is taken to be placed in a beaker；
S2, it takes 50ml dehydrated alcohol to pour into the beaker of addition glacial acetic acid of step S1, is mixed, obtained with glacial acetic acid
Show the corrosive liquid of super-high strength steel austenite grain boundary.
The application method of the corrosive liquid includes the following steps:
S1, sample preparation: taking metallographic sample, embedding to metallographic sample progress hot insert, obtains metallographic specimen；
S2, grinding: it carries out the abrasive paper for metallograph of metallographic specimen obtained in step S1 or abrasive machine to be ground to surface scratch
Shallow and only one direction, the metallographic specimen after being ground；
S3, polishing: the metallographic specimen after the grinding is smeared into diamond polishing cream to corrosion surface, and in polishing machine
Upper selection carries out dry throwing perpendicular to the direction of scratch, until scratch carries out after almost eliminating plus water-wet is thrown, obtains the mirror surface of no marking；
S4, corrosion: the mirror surface of the no marking of the obtained metallographic specimen of step S3 being placed in up and is prepared in corrosive liquid,
25min is stood, corrosive environment temperature is 20 DEG C；
S5, observation: the metallographic specimen in step S4 being taken out, washes with water erosional surface, then uses alcohol washes erosional surface, baking
After dry, observed.
Comparative example 1
Prepare the aqueous corrosion agent of picrate acid distillation:
It takes 70mL distilled water to be added in small beaker, 1.5g sea-gull board hair cream and 2.5g picric acid is added, and this is small
Beaker is put into the large beaker for filling water, will be heated to large beaker with Electric stove, and so that small beaker is in water-bath state, work as instruction
When temperature is 40 DEG C, a melted paraxylene and minute quantity CuCl2 (stirring) is added；A drop is added when instruction temperature is 50 DEG C
The drop of HCl and one HF (stirring).When indicating temperature is 54 DEG C (corrosive agent actual temperature is 50 DEG C or so), about 20- is kept the temperature
30min。
Metallographic sample is corroded:
S1, sample preparation: taking metallographic sample, embedding to metallographic sample progress hot insert, obtains metallographic specimen；
S2, grinding: it carries out the abrasive paper for metallograph of metallographic specimen obtained in step S1 or abrasive machine to be ground to surface scratch
Shallow and only one direction, the metallographic specimen after being ground；
S3, polishing: the metallographic specimen after the grinding is smeared into diamond polishing cream to corrosion surface, and in polishing machine
Upper selection carries out dry throwing perpendicular to the direction of scratch, until scratch carries out after almost eliminating plus water-wet is thrown, obtains the mirror surface of no marking；
S4, corrosion: the metallographic specimen obtained with tweezers gripping step S3 makes it wait corroding face-up be put in and prepares corrosive agent
In, do not stop to shake, control time 15-35s, corrosive environment temperature is 0 DEG C -40 DEG C；
S5, observation: the metallographic specimen in step S4 being taken out, washes with water erosional surface, then uses alcohol washes erosional surface, baking
After dry, observed.
Comparative example 2
It prepares picric acid sea-gull board hair cream and adds distilled water corrosion agent:
It takes 100mL distilled water to be added in small beaker, 4g sea-gull board hair cream and 5g picric acid is added, it will be right with Electric stove
Large beaker heating, makes small beaker be in water-bath state, corrosive agent is boiled 3-5min, then stops heating, makes corrosive agent gradually
60 DEG C are cooled to, heat preservation.
Metallographic sample is corroded:
S1, sample preparation: taking metallographic sample, embedding to metallographic sample progress hot insert, obtains metallographic specimen；
S2, grinding: it carries out the abrasive paper for metallograph of metallographic specimen obtained in step S1 or abrasive machine to be ground to surface scratch
Shallow and only one direction, the metallographic specimen after being ground；
S3, polishing: the metallographic specimen after the grinding is smeared into diamond polishing cream to corrosion surface, and in polishing machine
Upper selection carries out dry throwing perpendicular to the direction of scratch, until scratch carries out after almost eliminating plus water-wet is thrown, obtains the mirror surface of no marking；
S4, corrosion: the metallographic specimen obtained with tweezers gripping step S3 makes it wait corroding face-up be put in and prepares corrosive agent
In, under shaking is several, surface is made sufficiently by the erosion of corrosive agent, to be kept for 1 point take out within 30 seconds；
S5, observation: the metallographic specimen in step S4 being taken out, washes with water erosional surface, then uses alcohol washes erosional surface, baking
After dry, observed.
It can show that display super-high strength steel austenite provided by the invention by the original austenite metallographic microscope of Fig. 1 to Fig. 5
What the corrosive liquid of crystal boundary was capable of complete display shows the strong rigid austenite grain boundary of the superelevation studied of the present invention, and comparative example 1 and right
Ratio 2 can not then show austenite grain boundary.
It is to be understood that it is not provided by the invention aobvious that the present embodiment 1-3 selects 0 DEG C, 20 DEG C and 40 DEG C respectively
Show that the corrosive liquid of super-high strength steel austenite grain boundary and transgranular bainite and martensite needs to carry out temperature control, but in order to verify
In the display super-high strength steel austenite of the offer of the invention under room temperature in 0 DEG C, 20 DEG C and 40 DEG C Various Seasonal and region
The corrosive liquid of crystal boundary and intergranular structure's bainite and martensite can be carried out etching operation, to prove display provided by the invention
The corrosive liquid of super-high strength steel austenite grain boundary and transgranular bainite and martensite just can be carried out etching operation at room temperature, without adding
Heat.
Meanwhile the corrosive liquid of display super-high strength steel austenite grain boundary provided by the invention and transgranular bainite and martensite exists
In corrosion process can demand according to the observation take out sample at any time in corrosion process and observed, convenient for austenite grain boundary
Corrosion process observed and recorded, it is convenient to operate, and can clearly react the corrosion process of austenite grain boundary, is convenient for the later period
The strong rigidity energy of superelevation is predicted, so that it is guaranteed that the strong foreseeable accuracy of rigidity of superelevation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not whole embodiments of the invention, not to limit
The system present invention, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in
Within protection scope of the present invention.
In addition to the technical characteristic described in the specification, remaining technical characteristic is technology known to those skilled in the art, in order to prominent
Innovative characteristics of the invention out, details are not described herein for above-mentioned technical characteristic.
Claims (8)
1. a kind of corrosive liquid for showing unimach austenite grain boundary, it is characterised in that: the corrosive liquid includes following components: ice
Acetic acid, dehydrated alcohol；Wherein, the volume ratio of glacial acetic acid and dehydrated alcohol are as follows: 1:3-7.
2. the corrosive liquid of display super-high strength steel austenite grain boundary according to claim 1, it is characterised in that: the corrosive liquid packet
Include following components: glacial acetic acid, dehydrated alcohol；Wherein, the volume ratio of glacial acetic acid and dehydrated alcohol are as follows: 1:3.
3. the corrosive liquid of display super-high strength steel austenite grain boundary according to claim 1, it is characterised in that: the corrosive liquid packet
Include following components: glacial acetic acid, dehydrated alcohol；Wherein, the volume ratio of glacial acetic acid and dehydrated alcohol are as follows: 1:5.
4. the corrosive liquid of display super-high strength steel austenite grain boundary according to claim 1, it is characterised in that: the corrosive liquid packet
Include following components: glacial acetic acid, dehydrated alcohol；Wherein, the volume ratio of glacial acetic acid and dehydrated alcohol are as follows: 1:7.
5. the corrosive liquid of display super-high strength steel austenite grain boundary according to claim 1, it is characterised in that: the superelevation is strong
The alloying component percentage of steel are as follows: C:0.15-0.25%, Si:1.5-2.0%, Mn:1.0-1.9%, P :≤
0.1%, S :≤0.1%, Al:0.1-0.2%, Nb+V+Ti+Cr+Mo+B :≤2.6%, remaining is Fe.
6. the preparation method of the corrosive liquid of display super-high strength steel austenite grain boundary as described in claim 1, it is characterised in that: packet
Include following steps:
S1, glacial acetic acid is taken to be placed in a beaker；
S2, it takes dehydrated alcohol to pour into the beaker of addition glacial acetic acid of step S1, is mixed with glacial acetic acid, obtain display superelevation
The corrosive liquid of strong steel austenite grain boundary.
7. the application of the corrosive liquid of display super-high strength steel austenite grain boundary as described in claim 1, it is characterised in that: the corrosion
Liquid is for showing super-high strength steel austenite grain boundary and transgranular bainite and martensite.
8. the application of the corrosive liquid of display super-high strength steel austenite grain boundary according to claim 7, it is characterised in that: the corruption
The application method of erosion liquid includes the following steps:
S1, sample preparation: taking metallographic sample, embedding to metallographic sample progress hot insert, obtains metallographic specimen；
S2, grinding: by the abrasive paper for metallograph of metallographic specimen obtained in step S1 or abrasive machine be ground to surface scratch it is shallow and
Only one direction, the metallographic specimen after being ground；
S3, polishing: smearing diamond polishing cream to corrosion surface for the metallographic specimen after the grinding, and in selecting on polishing machine
The direction selected perpendicular to scratch carries out dry throwing, until scratch carries out after almost eliminating plus water-wet is thrown, obtains the mirror surface of no marking；
S4, corrosion: the mirror surface of the no marking of the obtained metallographic specimen of step S3 being placed in up and is prepared in corrosive liquid, is stood
10-40min, corrosive environment temperature are 0 DEG C -40 DEG C；
S5, observation: the metallographic specimen in step S4 being taken out, washes with water erosional surface, then uses alcohol washes erosional surface, is dried
Afterwards, it is observed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910730275.3A CN110453222B (en) | 2019-08-08 | 2019-08-08 | Corrosive liquid for displaying austenite grain boundary of ultrahigh-strength steel, and preparation method and application thereof |
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