CN111155168A - Corrosive for nickel-saving austenitic stainless steel metallographic phase - Google Patents
Corrosive for nickel-saving austenitic stainless steel metallographic phase Download PDFInfo
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- CN111155168A CN111155168A CN202010012121.3A CN202010012121A CN111155168A CN 111155168 A CN111155168 A CN 111155168A CN 202010012121 A CN202010012121 A CN 202010012121A CN 111155168 A CN111155168 A CN 111155168A
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- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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Abstract
The embodiment of the invention provides a corrosive agent for nickel-saving austenitic stainless steel metallographic phase, which consists of 8-12 parts by weight of oxalic acid, 2-4 parts by volume of hydrochloric acid and 80-120 parts by volume of distilled water; when the weight part unit is gram, the volume part unit is milliliter; when the parts by weight are in kilograms, the parts by volume are in liters; the consumption of the oxalic acid, the hydrochloric acid and the distilled water is enlarged or reduced in equal proportion.
Description
Technical Field
The invention belongs to the field of corrosive agents, and particularly relates to a corrosive agent for nickel-saving austenitic stainless steel metallographic phase.
Background
The nickel-saving austenitic stainless steel is a metastable austenitic stainless steel obtained by partially replacing nickel in chromium-nickel stainless steel with manganese and nitrogen. The steel has good strength, plasticity and equivalent corrosion resistance, and the corrosion resistance of the steel can be comparable to that of 304 stainless steel under the common use environment; therefore, the paint has wide application, and is mainly used in the civil fields such as kitchens, toilet equipment, appliances, architectural decoration and the like. In the research and application of the nickel-saving austenitic stainless steel, in order to ensure that a stable austenite structure is obtained, the structure needs to be analyzed, and the components, rolling and solution treatment processes are adjusted according to the analysis result, so that the clear display of the austenite grain boundary is very important. However, because the nickel-saving austenitic stainless steel is added with alloy elements such as chromium, nickel, manganese, nitrogen and the like, the corrosion resistance is better, the corrosion of the metallographic structure of the nickel-saving austenitic stainless steel is different from that of common carbon steel, a special corrosive agent needs to be prepared, and the austenite grain boundary can be clearly displayed by adopting a special corrosion method.
A commonly used corrosive for austenitic stainless steels is 5g FeCl, which is referred to the literature and patents disclosed at present3+5ml of concentrated hydrochloric acid +50ml of aqueous solution, or 20g of picric acid +100ml of concentrated hydrochloric acid, or 15ml of HCl +5ml of HNO3Aqua regia solution, etc., but the corrosive agents have a deficiency in the effect of corroding the structure of the nickel-saving austenitic stainless steel. FeCl3The hydrochloric acid aqueous solution is most commonly used, but the corrosion degree is difficult to control, the corrosion time is long, from several minutes to more than ten minutes, the corrosion grain boundary is shallow, the black spots of a sample are more polluted, and the austenite grain boundary cannot be clearly and accurately displayed. The picric acid and hydrochloric acid solution is also difficult to control the erosion degree, the erosion time is difficult to control, over-erosion is easy to occur, the crystal boundary becomes coarse and fuzzy, and an etched line is easy to appear in the crystal. The aqua regia is an etching agent adopted by metallographic structures of most austenitic stainless steels, but belongs to a strong corrosive reagent, potential safety hazards exist in use, after the aqua regia is used, corrosive liquid is difficult to treat, the corrosion reaction is severe, the control is difficult, the over corrosion is easy to occur, the crystal boundary becomes coarse and fuzzy, etching lines appear in the crystal, and the method is simple in preparation, convenient and safe to operate, and capable of preventing pollutionThe method is small in dyeing, and particularly important for preparing the corrosive agent and the corrosion method which are suitable for rapidly, uniformly and clearly displaying the nickel-saving austenitic stainless steel structure.
In the process of implementing the invention, the applicant finds that at least the following problems exist in the prior art: the existing corrosive has the problems that the corrosion degree is difficult to master, the corrosion effect is poor, or the corrosion is easy to cause over corrosion, the grain boundary becomes coarse and fuzzy, an etching line appears in a crystal, and the like, and is not favorable for tissue analysis and grain size evaluation.
Disclosure of Invention
The embodiment of the invention provides a nickel-saving austenitic stainless steel metallographic corrosive agent, and aims to solve the problems that the existing corrosive agent is difficult to control the corrosion degree, low in corrosion efficiency or easy to over-corrode, so that grain boundaries become coarse and fuzzy, etching lines appear in grains, and the texture analysis and grain size evaluation are facilitated.
In order to achieve the above object, an embodiment of the present invention provides a nickel-saving type etching agent for austenitic stainless steel, including:
the corrosive agent consists of 8-12 parts by weight of oxalic acid, 2-4 parts by volume of hydrochloric acid and 80-120 parts by volume of distilled water; when the weight part unit is gram, the volume part unit is milliliter; when the parts by weight are in kilograms, the parts by volume are in liters; the consumption of the oxalic acid, the hydrochloric acid and the distilled water is enlarged or reduced in equal proportion.
Further, the corrosive agent preparation step: adding 8-12 parts by weight of oxalic acid into 80-120 parts by volume of distilled water, continuously stirring and uniformly mixing to prepare an oxalic acid solution, pouring 2-4 parts by volume of hydrochloric acid into the prepared oxalic acid solution, and uniformly stirring and mixing to prepare the corrosive.
Further, the corrosive agent preparation step: adding 10g of oxalic acid into a beaker filled with 100ml of distilled water, stirring and mixing uniformly to prepare an oxalic acid solution, adding 2ml of hydrochloric acid into the prepared oxalic acid solution, and stirring and mixing uniformly to prepare the corrosive agent.
Further, the corrosive agent preparation step: adding 8g of oxalic acid into a beaker filled with 90ml of distilled water, stirring and mixing uniformly to prepare an oxalic acid solution, adding 3ml of hydrochloric acid into the prepared oxalic acid solution, and stirring and mixing uniformly to prepare the corrosive agent.
Further, the corrosive agent preparation step: adding 12g of oxalic acid into a beaker filled with 110ml of distilled water, stirring and mixing uniformly to prepare an oxalic acid solution, adding 4ml of hydrochloric acid into the prepared oxalic acid solution, and stirring and mixing uniformly to prepare the corrosive agent.
Further, the use method of the corrosive agent is as follows: taking a prepared nickel-saving austenitic stainless steel metallographic specimen as an anode, and fixedly leading out the specimen to the anode of a direct-current stabilized power supply by using forceps clamps plated with zinc on a surface layer; the aluminum plate is taken as a cathode, is led out and connected to the cathode of the direct-current stabilized power supply, the metallographic sample and the aluminum plate are kept parallel, the polished surface of the metallographic sample faces the aluminum plate, the corrosive agent is taken as a conductive solution, the anode and the cathode are immersed in the corrosive agent, and a lead immersed in the corrosive agent is copper;
further, the nickel-saving austenitic stainless steel has the composition J3: c, carbon C: 0.12 wt%, silicon Si: 0.40 wt%, manganese Mn: 9.0 wt%, chromium Cr: 13.8 wt%, nickel Ni: 1.31 wt%, copper Cu: 0.55 wt%, phosphorus P: 0.04 wt%, sulfur S: 0.004 wt%, nitrogen N: 0.15 wt% and the balance Fe.
Further, the nickel-saving austenitic stainless steel has the composition J5: c, carbon C: 0.08 wt%, silicon Si: 0.47 wt%, manganese Mn: 7.8 wt%, Cr: 15.7 wt%, nickel Ni: 1.22 wt%, phosphorus P: 0.04 wt%, sulfur S: 0.004 wt%, nitrogen N: 0.20 wt% and the balance Fe.
The technical scheme has the following beneficial effects: the corrosive agent is convenient to prepare and high in corrosion efficiency; the corrosion degree of the sample is easy to control, and the stability and the reproducibility are good; the corrosive has small interference on tissues, good corrosion effect, difficult surface contamination and clear crystal boundary, and the over-corrosion only deeply corrodes and widens the crystal boundary, thereby not causing the crystal boundary to be fuzzy and being beneficial to tissue analysis and grain size evaluation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a cold-rolled structure morphology diagram of J3 nickel-saving austenitic stainless steel after bright annealing in example 1
FIG. 2 is a hot-rolled structure morphology chart of J3 nickel-saving austenitic stainless steel after solution treatment in example 2
FIG. 3 is a microstructure of the sample of FIG. 2 after metallographic etching with aqua regia
FIG. 4 is a cold-rolled structure morphology diagram of J5 nickel-saving austenitic stainless steel after bright annealing in example 3
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A nickel-saving type austenitic stainless steel metallographic corrosive agent comprises:
the corrosive agent consists of 8-12 parts by weight of oxalic acid, 2-4 parts by volume of hydrochloric acid and 80-120 parts by volume of distilled water; when the weight part unit is gram, the volume part unit is milliliter; when the parts by weight are in kilograms, the parts by volume are in liters; the consumption of the oxalic acid, the hydrochloric acid and the distilled water is enlarged or reduced in equal proportion.
Further, the corrosive agent preparation step: adding 8-12 parts by weight of oxalic acid into 80-120 parts by volume of distilled water, continuously stirring and uniformly mixing to prepare an oxalic acid solution, pouring 2-4 parts by volume of hydrochloric acid into the prepared oxalic acid solution, and uniformly stirring and mixing to prepare the corrosive.
Further, the corrosive agent preparation step: adding 10g of oxalic acid into a beaker filled with 100ml of distilled water, stirring and mixing uniformly to prepare an oxalic acid solution, adding 2ml of hydrochloric acid into the prepared oxalic acid solution, and stirring and mixing uniformly to prepare the corrosive agent.
Further, the corrosive agent preparation step: adding 8g of oxalic acid into a beaker filled with 90ml of distilled water, stirring and mixing uniformly to prepare an oxalic acid solution, adding 3ml of hydrochloric acid into the prepared oxalic acid solution, and stirring and mixing uniformly to prepare the corrosive agent.
Further, the corrosive agent preparation step: adding 12g of oxalic acid into a beaker filled with 110ml of distilled water, stirring and mixing uniformly to prepare an oxalic acid solution, adding 4ml of hydrochloric acid into the prepared oxalic acid solution, and stirring and mixing uniformly to prepare the corrosive agent.
Further, the use method of the corrosive agent is as follows: taking a prepared nickel-saving austenitic stainless steel metallographic specimen as an anode, and fixedly leading out the specimen to the anode of a direct-current stabilized power supply by using forceps clamps plated with zinc on a surface layer; the aluminum plate is taken as a cathode, is led out and connected to the cathode of the direct-current stabilized power supply, the metallographic sample and the aluminum plate are kept parallel, the polished surface of the metallographic sample faces the aluminum plate, the corrosive agent is taken as a conductive solution, the anode and the cathode are immersed in the corrosive agent, and a lead immersed in the corrosive agent is copper;
and (5) switching on a power supply to corrode, and finishing corrosion when the corrosion surface of the metallographic specimen is silvery gray. Cutting off a power supply, taking down a metallographic specimen, washing with distilled water, and then spray-washing with alcohol for blow-drying to obtain a nickel-saving austenitic stainless steel structure to be observed; and finally observing by using a Zessis metallographic microscope to obtain the nickel-saving austenitic stainless steel structure.
Further, the nickel-saving austenitic stainless steel has the composition J3: c, carbon C: 0.12 wt%, silicon Si: 0.40 wt%, manganese Mn: 9.0 wt%, chromium Cr: 13.8 wt%, nickel Ni: 1.31 wt%, copper Cu: 0.55 wt%, phosphorus P: 0.04 wt%, sulfur S: 0.004 wt%, nitrogen N: 0.15 wt% and the balance Fe.
Further, the nickel-saving austenitic stainless steel has the composition J5: c, carbon C: 0.08 wt%, silicon Si: 0.47 wt%, manganese Mn: 7.8 wt%, Cr: 15.7 wt%, nickel Ni: 1.22 wt%, phosphorus P: 0.04 wt%, sulfur S: 0.004 wt%, nitrogen N: 0.20 wt% and the balance Fe.
Commonly used etchant 5gFeCl3+5ml of concentrated hydrochloric acid +50ml of aqueous solution, or 20g of picric acid +100ml of concentrated hydrochloric acid, or 15ml of HCl +5ml of HNO3+100ml of aqueous solution (aqua regia) belongs to a chemical etching method, and the surface of a sample is wiped after a corrosive agent is prepared, but in practice, the corrosion time is long, results can not be obtained from several minutes to more than ten minutes, and the chemical etching is an extremely corrosive and volatile acid solution, so that the operation is inconvenient. The method is an electrolytic etching method, clear results can be obtained within 40-60 s, and if the corrosion time is longer than 1-2 minutes, the grain boundary is only widened, the structure is not changed, and the grain size is not changed.
The invention relates to a nickel-saving austenitic stainless steel, belonging to an alloy with extremely high chemical stability, wherein the structure of the alloy is difficult to clearly display by a chemical etching method.
The preparation and metallographic corrosion steps of the corrosive of the invention are as follows:
(1) preparation of the etchant
The corrosive agent is prepared from 8-12 parts by weight of oxalic acid, 2-4 parts by volume of hydrochloric acid and 80-120 parts by volume of distilled water, wherein when the parts by weight are grams, the parts by volume are milliliters; when the parts by weight are in kilograms, the parts by volume are in liters; the amount of each component can be enlarged or reduced in equal proportion.
a) Adding 8-12 g of oxalic acid into 80-120 ml of distilled water, and continuously stirring and uniformly mixing.
b) And pouring 2-4 ml of hydrochloric acid into the prepared oxalic acid solution, and stirring and mixing uniformly.
(2) Metallographic corrosion method
a) And (3) carrying out coarse grinding, fine grinding, polishing, cleaning and blow-drying on the nickel-saving austenitic stainless steel sample to prepare a metallographic sample.
b) Taking the prepared sample as an anode, and fixedly leading out the sample to the anode of a direct current stabilized power supply by using a forceps clamp plated with zinc on a surface layer; the aluminum plate is taken as a cathode, is led out to be connected to the cathode of the direct current stabilized power supply, the sample and the aluminum plate are kept parallel, the polished surface of the sample faces the aluminum plate, the corrosive agent is taken as a conductive solution, the anode and the cathode are immersed in the corrosive agent, the oxalic acid is weak acid, and a lead immersed in the corrosive agent can be made of common metal materials such as copper;
c) switching on a power supply, controlling the voltage to be 20-30V, and controlling the time to be 40-60 s, wherein the corrosion surface is preferably silver gray;
d) cutting off a power supply, taking down the sample, washing with distilled water, and then washing with alcohol and drying to obtain the austenitic stainless steel structure to be observed.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The compositions of the J3 stainless steel used in more specific examples 1 and 2 of the present invention are shown in table 1; the composition of the J5 stainless steel used in example 3 is shown in table 2.
Table 1: test J3 stainless Steel composition (wt%)
| C | Si | Mn | Cr | Ni | Cu | P | S | N | Fe |
| 0.12 | 0.40 | 9.0 | 13.8 | 1.31 | 0.55 | 0.04 | 0.004 | 0.15 | Balance of |
Table 2: test J5 stainless Steel composition (wt%)
| C | Si | Mn | Cr | Ni | Cu | P | S | N | Fe |
| 0.08 | 0.47 | 7.8 | 15.9 | 1.22 | / | 0.04 | 0.004 | 0.20 | Balance of |
Example 1
(1) Caustic formulation
Firstly, 10g of oxalic acid is added into a beaker filled with 100ml of distilled water, after the oxalic acid is evenly stirred, 2ml of hydrochloric acid is added into the prepared oxalic acid solution, and the oxalic acid solution is evenly stirred to prepare the corrosive agent.
(2) Sample preparation
And grinding and polishing the test surface of the J3 nickel-saving austenitic stainless steel cold-rolled sample subjected to bright annealing by using water grinding sand paper of No. 240, No. 360, No. 600, No. 800, No. 1000 and No. 1200 to obtain a sample to be corroded, cleaning by using distilled water, and spray-washing by using alcohol and blow-drying.
(3) Corrosion display
The sample is held and fixed by tweezers and is connected to a DC stabilized voltage power supply. The sample is connected with the positive pole, the aluminum plate is connected with the negative pole, the voltage is 20V, and the time is 50 s. And after the corrosion is finished, cutting off a power supply, taking off the sample, washing the sample by using distilled water, then spraying, washing and drying the sample by using alcohol, and observing the sample by using a Zessis metallographic microscope, wherein the structure is shown in figure 1, the corrosion effect is good, the crystal boundary is clear, the contrast between the crystal boundary and the material matrix structure is large, and the structure analysis and the grain size evaluation are facilitated.
Example 2
(1) Caustic formulation
Adding 8g of oxalic acid into a beaker filled with 90ml of distilled water, stirring uniformly, adding 3ml of hydrochloric acid into the prepared oxalic acid solution, and stirring uniformly to prepare the corrosive solution.
(2) Sample preparation
The test surface of a J3 nickel-saving austenitic stainless steel hot-rolled sample subjected to solution treatment is sequentially ground and polished by using No. 240, No. 360, No. 600, No. 800, No. 1000 and No. 1200 water mill sandpaper to form a sample to be corroded, and then the sample is cleaned by distilled water and is blown, washed and dried by alcohol.
(3) Corrosion display
The sample is held and fixed by tweezers and is connected to a DC stabilized voltage power supply. The sample was connected to the positive electrode, the aluminum plate was connected to the negative electrode, the voltage was 25V, and the time was 45 s. And after the corrosion is finished, cutting off a power supply, taking off the sample, washing the sample by using distilled water, then spraying, washing and drying the sample by using alcohol, and observing the sample by using a Zessis metallographic microscope, wherein the structure is shown in figure 2, the corrosion effect is good, the crystal boundary is clear, the contrast between the crystal boundary and the material matrix structure is large, and the tissue analysis and the grain size evaluation are facilitated. In order to illustrate the superiority of the invention, the applicant of the invention uses a chemical corrosion method to carry out metallographic corrosion on the same sample by using aqua regia, and FIG. 3 is a morphology diagram of a hot-rolled structure of J3 nickel-saving austenitic stainless steel after solution treatment by using aqua regia corrosion, the grain boundary is very unclear, the grain boundary has no contrast with the material matrix structure, and the etching line is obvious.
Example 3
(1) Caustic formulation
Adding 12g of oxalic acid into a beaker filled with 110ml of distilled water, stirring uniformly, adding 4ml of hydrochloric acid into the prepared oxalic acid solution, and stirring uniformly to prepare the corrosive solution.
(2) Sample preparation
And grinding and polishing the test surface of the J5 nickel-saving austenitic stainless steel cold-rolled sample subjected to bright annealing by using water grinding sand paper of No. 240, No. 360, No. 600, No. 800, No. 1000 and No. 1200 to obtain a sample to be corroded, cleaning by using distilled water, and spray-washing by using alcohol and blow-drying.
(3) Corrosion display
The sample is held and fixed by tweezers and is connected to a DC stabilized voltage power supply. The sample is connected with the positive pole, the aluminum plate is connected with the negative pole, the voltage is 30V, and the time is 40 s. And after the corrosion is finished, cutting off a power supply, taking off the sample, washing the sample by using distilled water, then spraying, washing and drying the sample by using alcohol, and observing the sample by using a Zessis metallographic microscope, wherein the structure is shown in figure 4, the corrosion effect is good, the crystal boundary is clear, the contrast between the crystal boundary and the material matrix structure is large, and the tissue analysis and the grain size evaluation are facilitated.
It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or hierarchy presented.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The corrosive agent for the nickel-saving austenitic stainless steel metallographic phase is characterized in that:
the corrosive agent consists of 8-12 parts by weight of oxalic acid, 2-4 parts by volume of hydrochloric acid and 80-120 parts by volume of distilled water; when the weight part unit is gram, the volume part unit is milliliter; when the parts by weight are in kilograms, the parts by volume are in liters; the consumption of the oxalic acid, the hydrochloric acid and the distilled water is enlarged or reduced in equal proportion.
2. The corrosive agent for the metallographic phase of the nickel-saving austenitic stainless steel according to claim 1, wherein:
the corrosive agent preparation step: adding 8-12 parts by weight of oxalic acid into 80-120 parts by volume of distilled water, continuously stirring and uniformly mixing to prepare an oxalic acid solution, pouring 2-4 parts by volume of hydrochloric acid into the prepared oxalic acid solution, and uniformly stirring and mixing to prepare the corrosive.
3. The corrosive agent for the metallographic phase of the nickel-saving austenitic stainless steel according to claim 1, wherein:
the corrosive agent preparation step: adding 10g of oxalic acid into a beaker filled with 100ml of distilled water, stirring and mixing uniformly to prepare an oxalic acid solution, adding 2ml of hydrochloric acid into the prepared oxalic acid solution, and stirring and mixing uniformly to prepare the corrosive agent.
4. The corrosive agent for the metallographic phase of the nickel-saving austenitic stainless steel according to claim 1, wherein:
the corrosive agent preparation step: adding 8g of oxalic acid into a beaker filled with 90ml of distilled water, stirring and mixing uniformly to prepare an oxalic acid solution, adding 3ml of hydrochloric acid into the prepared oxalic acid solution, and stirring and mixing uniformly to prepare the corrosive agent.
5. The corrosive agent for the metallographic phase of the nickel-saving austenitic stainless steel according to claim 1, wherein:
the corrosive agent preparation step: adding 12g of oxalic acid into a beaker filled with 110ml of distilled water, stirring and mixing uniformly to prepare an oxalic acid solution, adding 4ml of hydrochloric acid into the prepared oxalic acid solution, and stirring and mixing uniformly to prepare the corrosive agent.
6. The corrosive agent for the metallographic phase of the nickel-saving austenitic stainless steel according to claim 1, wherein:
the use method of the corrosive agent comprises the following steps: taking a prepared nickel-saving austenitic stainless steel metallographic specimen as an anode, and fixedly leading out the specimen to the anode of a direct-current stabilized power supply by using forceps clamps plated with zinc on a surface layer; the aluminum plate is taken as a cathode, is led out and connected to the cathode of the direct-current stabilized power supply, the metallographic sample and the aluminum plate are kept parallel, the polished surface of the metallographic sample faces the aluminum plate, the corrosive agent is taken as a conductive solution, the anode and the cathode are immersed in the corrosive agent, and a lead immersed in the corrosive agent is copper;
and (5) switching on a power supply to corrode, and finishing corrosion when the corrosion surface of the metallographic specimen is silvery gray.
7. The corrosive agent for the metallographic phase of the nickel-saving austenitic stainless steel according to claim 1, wherein:
the nickel-saving austenitic stainless steel comprises the following components J3: c, carbon C: 0.12 wt%, silicon Si: 0.40 wt%, manganese Mn: 9.0 wt%, chromium Cr: 13.8 wt%, nickel Ni: 1.31 wt%, copper Cu: 0.55 wt%, phosphorus P: 0.04 wt%, sulfur S: 0.004 wt%, nitrogen N: 0.15 wt% and the balance Fe.
8. The corrosive agent for the metallographic phase of the nickel-saving austenitic stainless steel according to claim 1, wherein:
the nickel-saving austenitic stainless steel comprises the following components J5: c, carbon C: 0.08 wt%, silicon Si: 0.47 wt%, manganese Mn: 7.8 wt%, Cr: 15.7 wt%, nickel Ni: 1.22 wt%, phosphorus P: 0.04 wt%, sulfur S: 0.004 wt%, nitrogen N: 0.20 wt% and the balance Fe.
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| CN202010012121.3A CN111155168B (en) | 2020-01-07 | 2020-01-07 | Corrosive for nickel-saving austenitic stainless steel metallographic phase |
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| CN202010012121.3A CN111155168B (en) | 2020-01-07 | 2020-01-07 | Corrosive for nickel-saving austenitic stainless steel metallographic phase |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112798386A (en) * | 2020-12-30 | 2021-05-14 | 上海大学 | In-situ three-dimensional electrolytic etching liquid and electrolytic etching method for second-phase particles in stainless steel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1257446A1 (en) * | 1984-07-18 | 1986-09-15 | Предприятие П/Я В-2120 | Electrolyte for detecting boundaries of austenite grains in stainless steel |
| CN101270498A (en) * | 2008-04-11 | 2008-09-24 | 中国科学院金属研究所 | Ultra-supercritical steel organization display method |
| CN102766869A (en) * | 2012-06-11 | 2012-11-07 | 振石集团东方特钢股份有限公司 | Double-phase stainless steel microstructure and sigma mesophase chromatic corrosive and corrosion method |
| CN104634639A (en) * | 2013-11-13 | 2015-05-20 | 中国科学院金属研究所 | Coupled type metallographic corrosion method |
| CN107991161A (en) * | 2017-11-30 | 2018-05-04 | 东北大学 | The metallographic etching agent and caustic solution of a kind of super austenitic stainless steel |
| CN108360057A (en) * | 2018-01-12 | 2018-08-03 | 沈阳化工大学 | A kind of bright as silver electrochemistry graphic context label technique of efficient stainless steel |
| CN111893397A (en) * | 2020-08-14 | 2020-11-06 | 中国科学院金属研究所 | Low-precipitation super ferrite cast stainless steel and preparation method thereof |
-
2020
- 2020-01-07 CN CN202010012121.3A patent/CN111155168B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1257446A1 (en) * | 1984-07-18 | 1986-09-15 | Предприятие П/Я В-2120 | Electrolyte for detecting boundaries of austenite grains in stainless steel |
| CN101270498A (en) * | 2008-04-11 | 2008-09-24 | 中国科学院金属研究所 | Ultra-supercritical steel organization display method |
| CN102766869A (en) * | 2012-06-11 | 2012-11-07 | 振石集团东方特钢股份有限公司 | Double-phase stainless steel microstructure and sigma mesophase chromatic corrosive and corrosion method |
| CN104634639A (en) * | 2013-11-13 | 2015-05-20 | 中国科学院金属研究所 | Coupled type metallographic corrosion method |
| CN107991161A (en) * | 2017-11-30 | 2018-05-04 | 东北大学 | The metallographic etching agent and caustic solution of a kind of super austenitic stainless steel |
| CN108360057A (en) * | 2018-01-12 | 2018-08-03 | 沈阳化工大学 | A kind of bright as silver electrochemistry graphic context label technique of efficient stainless steel |
| CN111893397A (en) * | 2020-08-14 | 2020-11-06 | 中国科学院金属研究所 | Low-precipitation super ferrite cast stainless steel and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798386A (en) * | 2020-12-30 | 2021-05-14 | 上海大学 | In-situ three-dimensional electrolytic etching liquid and electrolytic etching method for second-phase particles in stainless steel |
| CN112798386B (en) * | 2020-12-30 | 2022-11-18 | 上海大学 | In-situ three-dimensional electrolytic etching liquid and electrolytic etching method for second-phase particles in stainless steel |
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