CN105018932B - A kind of Ni80Cr20 alloy rolled sheets metallographic etchant and its compound method and application method - Google Patents
A kind of Ni80Cr20 alloy rolled sheets metallographic etchant and its compound method and application method Download PDFInfo
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- CN105018932B CN105018932B CN201510440607.6A CN201510440607A CN105018932B CN 105018932 B CN105018932 B CN 105018932B CN 201510440607 A CN201510440607 A CN 201510440607A CN 105018932 B CN105018932 B CN 105018932B
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Abstract
The invention discloses a kind of Ni80Cr20 alloy rolled sheets metallographic etchant and its compound method and application method, the corrosive liquid are composed of the following components：Concentrated hydrochloric acid, glacial acetic acid, water, copper sulphate, the proportioning of four kinds of compositions is concentrated hydrochloric acid：Glacial acetic acid：Water：Copper sulphate is equal to 24 26 mL:4‑6 mL:29‑31mL:4‑5g.The Ni80Cr20 alloy rolled sheet etching pit liquid energies of the present invention quickly and efficiently corrode the metallographic structure for rolling state Ni80Cr20 sheet alloys, corrosive effect is good, the metallographic structure of research and development product is set to observe, after rolling state Ni80Cr20 sheet alloys corrosion, metallurgical structure and crystal boundary are very clear, crystal grain is shown completely, manufacturing enterprise's exploitation new product and observation new product institutional framework can be met, it is easy to accurately measure its grain size using metallographic microscope, and the technological parameter of rolling process is adjusted and optimized by the measurement of grain size, grasp and lifted the product quality of development.
Description
Technical field
The present invention relates to a kind of metallographic etchant, and in particular to a kind of Ni80Cr20 alloy rolled sheets metallographic etchant and
Its compound method and application method.
Background technology
Shown from the data that can be found at present, the data of Ni80Cr20 microstructure of the alloy corrosive liquids is considerably less, even if can be with
Find some related Ni80Cr20 microstructure of the alloy corrosive liquid data, but also without mark be worked structure metallographic etchant or
The metallographic etchant of cast sturcture, nichrome as cast condition metallographic etchant, it is impossible to corrode and nichrome worked structure metallographic group
Knit.Because the alloy grain after processing is smaller, dense structure is uniform, and corrosion resistance is very good, so needing the corruption of worked structure
Erosion liquid, which could corrode, metallographic structure.The metallographic etchant for corroding the as cast condition nichrome according to bedding-in carries out Ni80Cr20
Alloy rolled sheet etching pit, etching time length, and can not corrode metallographic structure at all, it also can not corrode metallographic using chloroazotic acid
Tissue, thus be badly in need of developing rolling state Ni80Cr20 sheet alloys metallographic etchant progress etching pit.
Metallographic detection is that manufacturing enterprise judges and controls the quality of production in process of production, lifts product quality, while right
The quality problems occurred in production process are analyzed, by changing production technology and Optimizing Process Parameters.And etching pit is
Metallographic detection top priority, only corrode and clearly metallographic structure and crystal boundary, could carry out grain size and metallographic structure and
The analysis of content contained by each phase, it could judge whether crystal grain is excessive, if the problems such as burning be present.
The content of the invention
The invention aims to solve technical problem present in prior art, there is provided one kind is for rolling state
Ni80Cr20 sheet alloys and it can rapidly and efficiently corrode the Ni80Cr20 alloy rolled sheet metallographic etchants for metallographic structure.
Another object of the present invention is to provide a kind of preparation side of Ni80Cr20 alloy rolled sheets metallographic etchant
Method and application method.
In order to achieve the above object, the present invention uses following technical scheme：A kind of Ni80Cr20 alloy rolled sheets metallographic
Corrosive liquid, it is composed of the following components：Concentrated hydrochloric acid, glacial acetic acid, water, copper sulphate, the proportioning of four kinds of compositions is concentrated hydrochloric acid：Ice second
Acid：Water：Copper sulphate is equal to 24-26 mL:4-6 mL:29-31mL:4-5g.
Further, the proportioning of four kinds of compositions is concentrated hydrochloric acid：Glacial acetic acid：Water：Copper sulphate is equal to 25 mL:5mL:30mL:
4.5g。
Further, the concentrated hydrochloric acid is pure, the mass fraction 36%-38% of analysis.
Further, the glacial acetic acid is pure, the mass fraction 99.5% of analysis.
A kind of compound method of Ni80Cr20 alloy rolled sheets metallographic etchant, this method comprise the following steps：First claim
Take copper sulphate to pour into beaker, then measure water and pour into this beaker, then measure glacial acetic acid and pour into this beaker, then measure concentrated hydrochloric acid
Pour into this beaker, stirred using glass bar, until copper sulphate melts completely, stand at least 10 minutes.
A kind of application method of Ni80Cr20 alloy rolled sheets metallographic etchant, this method comprise the following steps：
A, Ni80Cr20 alloy rolled sheets are sampled, and metallographic specimen is cut into cutting machine；
B, edge sample is carried out to metallographic specimen using mounting press；
C, metallographic specimen is ground using varigrained metallographic waterproof abrasive paper；
D, grinding and polishing is carried out to metallographic specimen using diamond paste on polishing machine；
E, again to metallographic specimen surface alcohol rinse after being rinsed to metallographic specimen surface water；
F, metallographic specimen is put into the Ni80Cr20 alloy rolled sheet metallographic etchants prepared, corrosive liquid soaks completely
Wet metallographic specimen surface, etching time are 3-8 minutes；
G, alcohol rinse metallographic specimen surface is used after being rinsed using distilled water to the metallographic specimen surface after corrosion again；
H, metallographic structure observation is carried out after metallographic specimen is dried up with hair-dryer using light microscope.
Further, 10X10X6mm metallographic specimen is cut into the step A with cutting machine.
Further, 400 mesh, 800 mesh, 1000 mesh, 1500 mesh, 2000 mesh metallographic waterproof abrasive papers pair are utilized in the step C
Metallographic specimen carries out metallographic grinding.
Further, metallographic specimen is ground using 3 micron diamond abrasive pastes on polishing machine in the step D
Throw, the bright cunning in metallographic specimen surface is observed after grinding and polishing 2 minutes and during without any cut, change clean polishing cloth, made with distilled water
For lubricant, polish 1 minute.
Concentrated hydrochloric acid dissolving nickel, chromium, manganese, titanium elements in corrosive liquid of the present invention；Glacial acetic acid dissolves aluminium element；Copper sulphate rises molten
Solve matter effect.The present invention corrosion mechanism be：Ni80Gr20 alloys are single phase austenite tissues, simple metal or single-phase alloy
Corrosion is the process of a chemolysis.Because atomic arrangement is irregular on crystal boundary, there is higher free energy, thus crystal boundary easily by
Corrode and be in chase, show tissue, under the microscope it can be seen that the crystal grain of polygon.If corrosion is deeper, due to
To difference, different crystal face rate of dissolutions is different, and the micro- plane after corrosion is different from the angle of former flour milling, is hanging down for each crystal grain position
Under the irradiation of direct light line, the light for being reflected into object lens is different, it can be seen that the different crystal grain of light and shade.
The present invention has the advantages that compared with the prior art：The Ni80Cr20 alloy rolled sheets metallographic of the present invention is rotten
Erosion liquid energy quickly and efficiently corrodes the metallographic structure for rolling state Ni80Cr20 sheet alloys, and corrosive effect is good, makes research and development product
Metallographic structure observed, to rolling state Ni80Cr20 sheet alloys corrosion after, metallurgical structure and crystal boundary are very clear,
Crystal grain is shown completely, can be met manufacturing enterprise's exploitation new product and observation new product institutional framework, is easy to utilize metallographic microscope
Accurately measure its grain size, and be adjusted and optimize the technological parameter of rolling process by the measurement of grain size, grasp and
Lift the product quality of development.The present invention makes researcher and manufacturing enterprise be closed to researching and developing and producing product Ni80Cr20
The institutional framework of golden rolled plate is observed and measured, and judges whether product meets enterprise's production and customer requirement, passes through tune
Whole technological parameter raising product quality and product lumber recovery, rate of reducing the number of rejects and seconds, improve the profit of enterprise's finished product and semi-finished product
Space, can be that scientific research and production bring very objective economic benefit.
Brief description of the drawings
Fig. 1 is metallurgical structure figure after Ni80Cr20 alloy rolled sheets corrosion in the embodiment of the present invention 1；
Fig. 2 is metallurgical structure figure after Ni80Cr20 alloy rolled sheets corrosion in the embodiment of the present invention 2；
Fig. 3 is metallurgical structure figure after Ni80Cr20 alloy rolled sheets corrosion in the embodiment of the present invention 3.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of Ni80Cr20 alloy rolled sheets metallographic etchant, is made up of the component of following content：Concentrated hydrochloric acid 25mL, ice
The mL of acetic acid 5, the mL of water 30, copper sulphate 4.5g, wherein concentrated hydrochloric acid are pure, the mass fraction 36%-38% of analysis；Glacial acetic acid is analysis
It is pure, mass fraction 99.5%.
When preparing the Ni80Cr20 alloy rolled sheet metallographic etchants, first weigh 4.5g copper sulphate and pour into 100 mL beakers
In, then measure 30 mL water and pour into this beaker, then measure 5 mL glacial acetic acids and pour into this beaker, then measure 25mL concentrated hydrochloric acids and fall
Enter in this beaker, stirred using glass bar, until copper sulphate melts completely, stand at least 10 minutes.
During using the Ni80Cr20 alloy rolled sheet metallographic etchants, first the Ni80Cr20 alloys of certain enterprise production are rolled
Panel is sampled, and 10X10X6mm metallographic specimen is cut into cutting machine；Then metallographic specimen is carried out using mounting press
Inlay sample；Metallographic grinding is carried out to metallographic specimen using 400 mesh, 800 mesh, 1000 mesh, 1500 mesh, 2000 mesh metallographic waterproof abrasive papers；So
Grinding and polishing is carried out to metallographic specimen using 3 micron diamond abrasive pastes on polishing machine afterwards, grinding and polishing observes metallographic specimen after 2 minutes
The bright cunning in surface and during without any cut, changes clean polishing cloth, is used as lubricant by the use of distilled water, polishes 1 minute；With water to metallographic
Again with alcohol to metallographic specimen surface washing after specimen surface flushing；Metallographic specimen is put into surface plate, inhaled with plastic dropper
Metallographic specimen surface is dropped in after entering the Ni80Cr20 alloy rolled sheet metallographic etchants prepared, corrosive liquid is soaked gold completely
Phase specimen surface, timing is carried out with manual time-keeping device, after etching time reaches 4 minutes, metallographic specimen is held out under the arm with agrafe, first
With distilled water is rinsed to the metallographic specimen surface after corrosion 1-2 minutes, the residual acid and salt ion of specimen surface is rinsed dry
Metallographic specimen surface is wiped with the absorbent cotton with alcohol again after net, then utilizes alcohol rinse metallographic specimen surface；Recycling is blown
Blower fan will carry out metallographic structure observation after the alcohol drying of metallographic specimen using light microscope.As can be seen from Figure 1：Should
Ni80Cr20 alloy rolled sheet metallographic etchant corrosive effects are very good, corrode metallographic specimen, the tissue of metallographic specimen with it
Structure and crystal boundary are very clear, and crystal grain is shown completely, are easy to accurately measure its grain size using metallographic microscope.
Embodiment 2
A kind of Ni80Cr20 alloy rolled sheets metallographic etchant, is made up of the component of following content：Concentrated hydrochloric acid 24mL, ice
The mL of acetic acid 6, the mL of water 31, copper sulphate 5g, wherein concentrated hydrochloric acid are pure, the mass fraction 36%-38% of analysis；Glacial acetic acid is analysis
It is pure, mass fraction 99.5%.
When preparing the Ni80Cr20 alloy rolled sheet metallographic etchants, first weigh 5g copper sulphate and pour into 100 mL beakers
In, then measure 31mL water and pour into this beaker, then measure 6 mL glacial acetic acids and pour into this beaker, then measure 24mL concentrated hydrochloric acids and pour into
In this beaker, stirred using glass bar, until copper sulphate melts completely, stand at least 10 minutes.
During using the Ni80Cr20 alloy rolled sheet metallographic etchants, first the Ni80Cr20 alloys of certain enterprise production are rolled
Panel is sampled, and 10X10X6mm metallographic specimen is cut into cutting machine；Then metallographic specimen is carried out using mounting press
Inlay sample；Metallographic grinding is carried out to metallographic specimen using 400 mesh, 800 mesh, 1000 mesh, 1500 mesh, 2000 mesh metallographic waterproof abrasive papers；So
Grinding and polishing is carried out to metallographic specimen using 3 micron diamond abrasive pastes on polishing machine afterwards, grinding and polishing observes metallographic specimen after 2 minutes
The bright cunning in surface and during without any cut, changes clean polishing cloth, is used as lubricant by the use of distilled water, polishes 1 minute；With water to metallographic
Again with alcohol to metallographic specimen surface washing after specimen surface flushing；Metallographic specimen is put into surface plate, inhaled with plastic dropper
Metallographic specimen surface is dropped in after entering the Ni80Cr20 alloy rolled sheet metallographic etchants prepared, corrosive liquid is soaked gold completely
Phase specimen surface, timing is carried out with manual time-keeping device, after etching time reaches 3 minutes, metallographic specimen is held out under the arm with agrafe, first
With distilled water is rinsed to the metallographic specimen surface after corrosion 1-2 minutes, the residual acid and salt ion of specimen surface is rinsed dry
Metallographic specimen surface is wiped with the absorbent cotton with alcohol again after net, then utilizes alcohol rinse metallographic specimen surface；Recycling is blown
Blower fan will carry out metallographic structure observation after the alcohol drying of metallographic specimen using light microscope.As can be seen from Figure 2：Should
Ni80Cr20 alloy rolled sheet metallographic etchant corrosive effects are good, corrode metallographic specimen, the institutional framework of metallographic specimen with it
And crystal boundary is clear, crystal grain is shown completely, is easy to accurately measure its grain size using metallographic microscope.
Embodiment 3
A kind of Ni80Cr20 alloy rolled sheets metallographic etchant, is made up of the component of following content：Concentrated hydrochloric acid 26mL, ice
The mL of acetic acid 4, the mL of water 29, copper sulphate 4g, wherein concentrated hydrochloric acid are pure, the mass fraction 36%-38% of analysis；Glacial acetic acid is analysis
It is pure, mass fraction 99.5%.
When preparing the Ni80Cr20 alloy rolled sheet metallographic etchants, first weigh 4g copper sulphate and pour into 100 mL beakers
In, then measure 29mL water and pour into this beaker, then measure 4mL glacial acetic acids and pour into this beaker, then measure 26mL concentrated hydrochloric acids and pour into
In this beaker, stirred using glass bar, until copper sulphate melts completely, stand at least 10 minutes.
During using the Ni80Cr20 alloy rolled sheet metallographic etchants, first the Ni80Cr20 alloys of certain enterprise production are rolled
Panel is sampled, and 10X10X6mm metallographic specimen is cut into cutting machine；Then metallographic specimen is carried out using mounting press
Inlay sample；Metallographic grinding is carried out to metallographic specimen using 400 mesh, 800 mesh, 1000 mesh, 1500 mesh, 2000 mesh metallographic waterproof abrasive papers；So
Grinding and polishing is carried out to metallographic specimen using 3 micron diamond abrasive pastes on polishing machine afterwards, grinding and polishing observes metallographic specimen after 2 minutes
The bright cunning in surface and during without any cut, changes clean polishing cloth, is used as lubricant by the use of distilled water, polishes 1 minute；With water to metallographic
Again with alcohol to metallographic specimen surface washing after specimen surface flushing；Metallographic specimen is put into surface plate, inhaled with plastic dropper
Metallographic specimen surface is dropped in after entering the Ni80Cr20 alloy rolled sheet metallographic etchants prepared, corrosive liquid is soaked gold completely
Phase specimen surface, timing is carried out with manual time-keeping device, after etching time reaches 8 minutes, metallographic specimen is held out under the arm with agrafe, first
With distilled water is rinsed to the metallographic specimen surface after corrosion 1-2 minutes, the residual acid and salt ion of specimen surface is rinsed dry
Metallographic specimen surface is wiped with the absorbent cotton with alcohol again after net, then utilizes alcohol rinse metallographic specimen surface；Recycling is blown
Blower fan will carry out metallographic structure observation after the alcohol drying of metallographic specimen using light microscope.As can be seen from Figure 3：Should
Ni80Cr20 alloy rolled sheet metallographic etchant corrosive effects are good, corrode metallographic specimen, the institutional framework of metallographic specimen with it
And crystal boundary is clear, crystal grain is shown completely, is easy to accurately measure its grain size using metallographic microscope.
Claims (9)
- A kind of 1. Ni80Cr20 alloy rolled sheets metallographic etchant, it is characterised in that：It is composed of the following components：Concentrated hydrochloric acid, Glacial acetic acid, water, copper sulphate, the proportioning of four kinds of compositions is concentrated hydrochloric acid：Glacial acetic acid：Water：Copper sulphate is equal to 24-26 mL:4-6 mL:29-31mL:4-5g。
- A kind of 2. Ni80Cr20 alloy rolled sheets metallographic etchant according to claim 1, it is characterised in that：This four kinds The proportioning of composition is concentrated hydrochloric acid：Glacial acetic acid：Water：Copper sulphate is equal to 25 mL:5mL:30mL:4.5g.
- A kind of 3. Ni80Cr20 alloy rolled sheets metallographic etchant according to claim 1 or 2, it is characterised in that：Institute Concentrated hydrochloric acid is stated to analyze pure, mass fraction 36%-38%.
- A kind of 4. Ni80Cr20 alloy rolled sheets metallographic etchant according to claim 1 or 2, it is characterised in that：Institute Glacial acetic acid is stated to analyze pure, mass fraction 99.5%.
- 5. a kind of compound method of Ni80Cr20 alloy rolled sheets metallographic etchant, it is characterised in that this method includes following step Suddenly：First weigh copper sulphate to pour into beaker, then measure water and pour into this beaker, then measure glacial acetic acid and pour into this beaker, then measure Take concentrated hydrochloric acid to pour into this beaker, stirred using glass bar, until copper sulphate melts completely, stand at least 10 minutes.
- 6. a kind of application method of Ni80Cr20 alloy rolled sheets metallographic etchant, it is characterised in that this method includes following step Suddenly：A, Ni80Cr20 alloy rolled sheets are sampled, and metallographic specimen is cut into cutting machine；B, edge sample is carried out to metallographic specimen using mounting press；C, metallographic specimen is ground using varigrained metallographic waterproof abrasive paper；D, grinding and polishing is carried out to metallographic specimen using diamond paste on polishing machine；E, again to metallographic specimen surface alcohol rinse after being rinsed to metallographic specimen surface water；F, metallographic specimen is put into the Ni80Cr20 alloy rolled sheet metallographic etchants prepared, corrosive liquid soaks gold completely Phase specimen surface, etching time are 3-8 minutes；G, alcohol rinse metallographic specimen surface is used after being rinsed using distilled water to the metallographic specimen surface after corrosion again；H, metallographic structure observation is carried out after metallographic specimen is dried up with hair-dryer using light microscope.
- 7. a kind of application method of Ni80Cr20 alloy rolled sheets metallographic etchant according to claim 6, its feature It is：10X10X6mm metallographic specimen is cut into the step A with cutting machine.
- 8. a kind of application method of Ni80Cr20 alloy rolled sheets metallographic etchant according to claim 6, its feature It is：Metallographic specimen is carried out using 400 mesh, 800 mesh, 1000 mesh, 1500 mesh, 2000 mesh metallographic waterproof abrasive papers in the step C Metallographic is ground.
- 9. a kind of application method of Ni80Cr20 alloy rolled sheets metallographic etchant according to claim 6, its feature It is：Grinding and polishing is carried out to metallographic specimen using 3 micron diamond abrasive pastes on polishing machine in the step D, after grinding and polishing 2 minutes It was observed that the bright cunning in metallographic specimen surface and during without any cut, changes clean polishing cloth, lubricant, polishing 1 is used as by the use of distilled water Minute.
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| CN107843592A (en) * | 2017-10-11 | 2018-03-27 | 河钢股份有限公司 | A kind of austenitic stainless steel weld joint tissue corrosive agent and its application method |
| CN109540634B (en) * | 2018-11-20 | 2022-02-22 | 中国航发贵州黎阳航空动力有限公司 | Detection method for GH4648 plate sample grains and microstructures |
| CN109468640A (en) * | 2018-11-26 | 2019-03-15 | 抚顺特殊钢股份有限公司 | A kind of SNCrW stainless steel metallographic etchant and its preparation method and application method |
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| CN104502173A (en) * | 2014-12-07 | 2015-04-08 | 金川集团股份有限公司 | Corroding method for metallographic specimen of high nickel-chromium alloy |
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