CN113865953B - Method for displaying and evaluating grain boundary carbide in low-carbon stamping steel by metallographic method - Google Patents
Method for displaying and evaluating grain boundary carbide in low-carbon stamping steel by metallographic method Download PDFInfo
- Publication number
- CN113865953B CN113865953B CN202110989943.1A CN202110989943A CN113865953B CN 113865953 B CN113865953 B CN 113865953B CN 202110989943 A CN202110989943 A CN 202110989943A CN 113865953 B CN113865953 B CN 113865953B
- Authority
- CN
- China
- Prior art keywords
- metallographic
- carbide
- grain boundary
- low
- sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 16
- 150000001247 metal acetylides Chemical class 0.000 claims abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 23
- 238000005498 polishing Methods 0.000 claims description 22
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 20
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 230000007797 corrosion Effects 0.000 claims description 20
- 238000005260 corrosion Methods 0.000 claims description 20
- 239000000126 substance Substances 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 235000019441 ethanol Nutrition 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 14
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 238000011049 filling Methods 0.000 claims description 10
- 239000011780 sodium chloride Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 9
- 238000011156 evaluation Methods 0.000 claims description 7
- 238000003486 chemical etching Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 2
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract 1
- 238000000227 grinding Methods 0.000 description 14
- 239000004744 fabric Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 244000137852 Petrea volubilis Species 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001887 electron backscatter diffraction Methods 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The invention belongs to the technical field of metal detection, and provides a method for displaying and evaluating grain boundary carbide in low-carbon stamping steel by a metallographic method. The method provided by the invention can clearly and completely display the appearance, the size and the distribution state of carbides at the intragranular position and the grain boundary position in the low-carbon stamping steel, and has the characteristics of low detection and analysis cost, safety, rapidness, simplicity and easiness in operation.
Description
Technical Field
The invention belongs to the technical field of detection, and particularly relates to a method for displaying and evaluating grain boundary carbide in low-carbon stamping steel by a metallographic method.
Background
The number, shape and distribution of carbide in the aluminum killed steel for low-carbon stamping directly affect the service performance of the aluminum killed steel, and are key factors for solving the problem of stamping cracking of the steel for low-carbon stamping; the morphology of the carbides at the grain boundaries directly affects their stamping properties. At present, 4% nitrate alcohol corrosion or picric acid corrosion is adopted for carbide display and evaluation, and a metallographic microscope or a scanning electron microscope is used for analysis by means of EBSD; however, the use of 4% nitroalcohol attack only can show granular carbide in the crystal, but can not show the granular carbide at the grain boundary, namely the strip-shaped or short rod-shaped carbide; picric acid is toxic and belongs to dangerous goods; the method has the defects of difficult sample preparation, complex operation, high cost and inaccurate evaluation proportion.
Disclosure of Invention
The invention aims to provide a method for displaying and evaluating grain boundary carbide in low-carbon stamping steel by a metallographic method, which can display all grain boundaries and carbide in the grain boundaries in a structure, can rapidly, accurately and safely observe the form, the quantity and the distribution of the carbide in the grain boundaries and at the grain boundaries, accurately evaluate the proportion of the carbide and accurately reflect the service performance of the carbide.
In order to solve the technical problems, the invention adopts the following technical scheme:
a metallographic method for displaying and evaluating grain boundary carbide in low-carbon stamping steel comprises the steps of sample preparation, chemical corrosion and microscopic observation and evaluation, wherein an aggressive agent used for the chemical corrosion is prepared from sulfuric acid alcohol solution and sodium chloride aqueous solution.
The volume concentration of the sulfuric acid alcohol solution is 0.03-0.08%.
The mass concentration of the sodium chloride aqueous solution is 0.1-0.25%.
The aggressive agent is prepared from sulfuric acid alcohol solution and sodium chloride aqueous solution according to the proportion of 2-5:1.
The etching time of the chemical etching is 1-8 s.
The specific operation of the sample preparation of the invention is as follows: and (3) taking a low-carbon steel plate for stamping, cutting a part of the sample to obtain a sample, and then sequentially inlaying and polishing the sample.
The specific operation of the inlaying and polishing treatment is as follows: putting the sample into a Simlimet 3000 automatic metallographic mosaic machine for mosaic; grinding the inlaid sample on 280# metallographic sand paper, 400# metallographic sand paper, 600# metallographic sand paper and 800# metallographic sand paper in turn, wherein the grinding direction is vertical to the previous scratch direction; and polishing at a speed of 300-1400 rpm for 1-5 minutes.
After chemical corrosion is finished, washing the sample with absolute ethyl alcohol, drying, and then observing under a ZEISS metallographic microscope to obtain a carbide metallographic picture; and opening the collected metallographic pictures in metallographic analysis software, selecting a filling color function, filling the color of carbide, extracting carbide, processing the pictures by utilizing binarization, and evaluating the percentage content of carbide.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
1. the invention adopts 0.03-0.08% sulfuric acid alcohol solution and 0.1-0.25% NaCl aqueous solution as the aggressive agent, can clearly show the crystal boundary of the low-carbon stamping steel and the form, proportion and size of carbide in the crystal, and solves the problem that the traditional nitrate alcohol aggressive agent cannot clearly show short rod-shaped and dot-shaped carbide at the crystal boundary.
2. The carbide proportion assessed by the method is accurate, has representativeness and can directly reflect the service performance of the steel.
3. The method of the invention adopts the aggressive agent which is safe, harmless to human body, nontoxic, and has the characteristics of low detection and analysis cost, rapidness, simplicity and safety.
Drawings
FIG. 1 is a diagram showing the structure of carbide obtained in example 1;
FIG. 2 is a carbide texture map obtained in example 2;
FIG. 3 is a chart showing the structure of carbide obtained in example 3;
FIG. 4 is a metallographic structure diagram obtained in comparative example 1;
FIG. 5 is a carbide texture map obtained in comparative example 1;
FIG. 6 is a metallographic structure diagram obtained in comparative example 2;
FIG. 7 is a metallographic structure diagram obtained in comparative example 3.
Detailed Description
The invention is described in further detail below with reference to the drawings and the specific examples.
Example 1
The metallographic sample preparation and display method of carbide in the low-carbon stamping steel with the brand of DC01 comprises the following specific steps of sample preparation, chemical corrosion and microscopic observation:
(1) Sample preparation: cutting a 15mm steel plate, putting the steel plate into a Simlimet 3000 automatic metallographic mosaic machine for mosaic, and coarsely grinding the mosaic sample by an MPJ-35 metallographic specimen grinding machine until the surface is flat and the scratch depths are consistent; then carrying out fine grinding by using 280-400-600-800 metallographic sand paper in sequence, wherein the grinding direction of each pass is perpendicular to the scratch direction of the last pass; finally, the mixture is put on a space boat polisher for polishing, a pressure sensitive adhesive woolen cloth polishing cloth with the thickness of 200mm is adopted, water is uniformly sprayed on the polishing cloth, a high-efficiency metallographic polishing agent with the thickness of 2.5 micrometers is uniformly sprayed on the polishing cloth, and the polishing is carried out for 1.5 minutes at the speed of 1400 revolutions per minute.
(2) Chemical corrosion: the used aggressive agent is prepared from sulfuric acid alcohol solution with volume concentration of 0.05% and NaCl aqueous solution with mass concentration of 0.1% according to the proportion of 3:1, and the aggressive time is 8s;
(3) And (3) observing by a microscope: after chemical corrosion, the carbide is washed clean by absolute ethyl alcohol, dried by a blower, and then is placed under a ZEISS metallographic microscope for observation, so that the appearance of the carbide can be clearly obtained, and the carbide is shown in figure 1.
(4) And (5) proportion evaluation: and (3) opening the metallographic picture 1 acquired in the step (3) in metallographic analysis software, selecting a filling color function, filling the color of carbide, extracting carbide, processing the picture by utilizing binarization, and evaluating the content to be 1.5%.
Example 2
The metallographic sample preparation and display method of carbide in the galvanized sheet for the low-carbon stamping with the brand of DC51D+Z comprises the steps of sample preparation, chemical corrosion and microscopic observation, and the specific process steps are as follows:
(1) Sample preparation: cutting a 15mm steel plate, putting the steel plate into a Simlimet 3000 automatic metallographic mosaic machine for mosaic, and coarsely grinding the mosaic sample by an MPJ-35 metallographic specimen grinding machine until the surface is flat and the scratch depths are consistent; then carrying out fine grinding by using 280-400-600-800 metallographic sand paper in sequence, wherein the grinding direction of each pass is perpendicular to the scratch direction of the last pass; finally, the mixture is put on a space boat polisher for polishing, a pressure sensitive adhesive woolen cloth polishing cloth with the thickness of 200mm is adopted, water is uniformly sprayed on the polishing cloth, a high-efficiency metallographic polishing agent with the thickness of 0.5 micrometer is uniformly sprayed on the polishing cloth, and the polishing is carried out for not more than 3 minutes at the speed of 1400 revolutions per minute.
(2) Chemical corrosion: the used aggressive agent is prepared from sulfuric acid alcohol with the volume concentration of 0.08 percent and NaCl aqueous solution with the mass concentration of 0.15 percent in a ratio of 2:1, and the aggressive time is 4s;
(3) And (3) observing by a microscope: after chemical corrosion, the sample is washed clean by absolute ethyl alcohol, dried by a blower, and then is placed under a ZISS metallographic microscope for observation, so that the clear free cementite morphology can be obtained, and the appearance is shown in figure 2.
(4) And (5) proportion evaluation: and (3) opening the metallographic picture 2 acquired in the step (3) in metallographic analysis software, selecting a filling color function, filling the color of carbide, extracting carbide, processing the picture by utilizing binarization, and evaluating the percentage content to be 2.5%.
Example 3
The metallographic sample preparation and display method of carbide in the low-carbon stamping steel with the brand number of DC03 comprises the following specific steps of sample preparation, chemical corrosion and microscopic observation:
(1) Sample preparation: cutting a 15mm steel plate, putting the steel plate into a Simlimet 3000 automatic metallographic mosaic machine for mosaic, and coarsely grinding the mosaic sample by an MPJ-35 metallographic specimen grinding machine until the surface is flat and the scratch depths are consistent; then carrying out fine grinding by using 280-400-600-800 metallographic sand paper in sequence, wherein the grinding direction of each pass is perpendicular to the scratch direction of the last pass; finally, the mixture is put on a space boat polisher for polishing, a pressure sensitive adhesive woolen cloth polishing cloth with the thickness of 200mm is adopted, water is uniformly sprayed on the polishing cloth, a high-efficiency metallographic polishing agent with the thickness of 2.5 microns is uniformly sprayed on the polishing cloth, and the polishing is carried out for 2 minutes at the speed of 1400 revolutions per minute.
(2) Chemical corrosion: the used aggressive agent is prepared from sulfuric acid alcohol solution with volume concentration of 0.03% and NaCl aqueous solution with mass concentration of 0.25% according to the proportion of 5:1, and the aggressive time is 1s;
(3) And (3) observing by a microscope: after chemical corrosion, the sample is washed clean with absolute ethyl alcohol, dried by a blower, and then placed under a ZISS metallographic microscope for observation, so that the appearance of the clear carbide can be obtained, and the appearance is shown in figure 3.
(4) And (5) proportion evaluation: and (3) opening the metallographic picture 3 acquired in the step (3) in metallographic analysis software, selecting a filling color function, filling the color of carbide, extracting carbide, processing the picture by utilizing binarization, and evaluating the percentage content to be 3.5%.
Comparative example 1
The comparative example differs from example 1 in that the aggressive agent used for chemical etching is 4% HNO 3 Alcohol, etching time is 4s; after the chemical corrosion is finished, the sample is washed clean by absolute ethyl alcohol, dried by a blower, and then is placed under a ZISS metallographic microscope for observation, so that the appearance of carbide at the grain boundary can not be obtained, and the appearance is shown in figure 4; the carbide diagram is observed by using a scanning electron microscope, see fig. 5, and since the scanning electron microscope is a microscopic morphological observation, the percentage of carbide in a micro area can be only assessed, and meanwhile, the cost is higher than that of a metallographic observation mode.
Comparative example 2
The comparative example differs from example 2 in that the aggressive agent used for chemical etching is 4% HNO 3 Alcohol, etching time is 5s; after the chemical corrosion is finished, the sample is washed clean by absolute ethyl alcohol, dried by a blower, and then is placed under a ZISS metallographic microscope for observation, and the appearance of carbide at the grain boundary can not be obtained, as shown in figure 6.
Comparative example 3
This comparative example differs from example 3 in thatThe comparative example used 4% HNO with different etchants used for chemical etching 3 Alcohol, etching time is 6s; after the chemical corrosion is completed, the sample is washed clean by absolute ethyl alcohol, dried by a blower, and then is placed under a ZISS metallographic microscope for observation, and the appearance of carbide at the grain boundary can not be obtained, as shown in figure 7.
Claims (3)
1. A method for displaying and evaluating grain boundary carbide in low-carbon stamping steel by a metallographic method is characterized by comprising the following steps of: the method comprises sample preparation, chemical corrosion and metallographic microscope observation and evaluation, wherein the aggressive agent used by the chemical corrosion is prepared from sulfuric acid alcohol solution and sodium chloride aqueous solution; the volume concentration of the sulfuric acid alcohol solution is 0.03-0.08%; the mass concentration of the sodium chloride aqueous solution is 0.1-0.25%; the aggressive agent is prepared from sulfuric acid alcohol solution and sodium chloride aqueous solution according to the proportion of 2-5:1; the etching time of the chemical etching is 1-8 s.
2. A method for metallographic display and assessment of grain boundary carbides in low carbon stamping steels according to claim 1, characterized by: the concrete operation of the sample preparation is as follows: and (3) taking a low-carbon steel plate for stamping, cutting a part of the sample to obtain a sample, and then sequentially inlaying and polishing the sample.
3. A method for metallographic display and assessment of grain boundary carbides in low carbon stamping steels according to claim 1, characterized by: the assessment method of the grain boundary carbide specifically comprises the following steps: after chemical corrosion is finished, washing the sample with absolute ethyl alcohol, drying, and then observing under a metallographic microscope to obtain a carbide metallographic picture; and opening the collected metallographic pictures in metallographic analysis software, selecting a filling color function, filling the color of carbide, extracting carbide, processing the pictures by utilizing binarization, and evaluating the percentage content of carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110989943.1A CN113865953B (en) | 2021-08-26 | 2021-08-26 | Method for displaying and evaluating grain boundary carbide in low-carbon stamping steel by metallographic method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110989943.1A CN113865953B (en) | 2021-08-26 | 2021-08-26 | Method for displaying and evaluating grain boundary carbide in low-carbon stamping steel by metallographic method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113865953A CN113865953A (en) | 2021-12-31 |
| CN113865953B true CN113865953B (en) | 2023-10-31 |
Family
ID=78988376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110989943.1A Active CN113865953B (en) | 2021-08-26 | 2021-08-26 | Method for displaying and evaluating grain boundary carbide in low-carbon stamping steel by metallographic method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113865953B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07325080A (en) * | 1994-06-02 | 1995-12-12 | Kawasaki Steel Corp | Method for presentive appearance of old austenite grain boundary of iron/steel |
| CN101545060A (en) * | 2009-05-14 | 2009-09-30 | 燕山大学 | Method for preparing copper porous material |
| CN104236993A (en) * | 2014-09-19 | 2014-12-24 | 北京科技大学 | Method for simultaneously displaying bearing steel austenite grain boundary and transgranular martensite |
| CN104849204A (en) * | 2015-05-29 | 2015-08-19 | 北京科技大学 | Electrochemical method for testing intercrystalline corrosion of 316LN austenitic stainless steel |
| CN106290140A (en) * | 2016-09-29 | 2017-01-04 | 珠海格力电器股份有限公司 | Method for detecting intergranular corrosion sensitivity of austenitic stainless steel |
| CN107121322A (en) * | 2017-05-08 | 2017-09-01 | 燕山大学 | The system display method of high-carbon high-alloy mould steel original austenite crystal prevention |
| CN109385633A (en) * | 2018-10-11 | 2019-02-26 | 广东省工业分析检测中心 | The metallographic etchant and its caustic solution of one Albatra metal |
| CN110672397A (en) * | 2019-09-16 | 2020-01-10 | 唐山钢铁集团有限责任公司 | Metallographic sample preparation and display method for aluminum-silicon coated steel plate |
| CN112857950A (en) * | 2021-01-18 | 2021-05-28 | 燕山大学 | Metallographic corrosive agent for biphase medium manganese steel and metallographic structure display method |
-
2021
- 2021-08-26 CN CN202110989943.1A patent/CN113865953B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07325080A (en) * | 1994-06-02 | 1995-12-12 | Kawasaki Steel Corp | Method for presentive appearance of old austenite grain boundary of iron/steel |
| CN101545060A (en) * | 2009-05-14 | 2009-09-30 | 燕山大学 | Method for preparing copper porous material |
| CN104236993A (en) * | 2014-09-19 | 2014-12-24 | 北京科技大学 | Method for simultaneously displaying bearing steel austenite grain boundary and transgranular martensite |
| CN104849204A (en) * | 2015-05-29 | 2015-08-19 | 北京科技大学 | Electrochemical method for testing intercrystalline corrosion of 316LN austenitic stainless steel |
| CN106290140A (en) * | 2016-09-29 | 2017-01-04 | 珠海格力电器股份有限公司 | Method for detecting intergranular corrosion sensitivity of austenitic stainless steel |
| CN107121322A (en) * | 2017-05-08 | 2017-09-01 | 燕山大学 | The system display method of high-carbon high-alloy mould steel original austenite crystal prevention |
| CN109385633A (en) * | 2018-10-11 | 2019-02-26 | 广东省工业分析检测中心 | The metallographic etchant and its caustic solution of one Albatra metal |
| CN110672397A (en) * | 2019-09-16 | 2020-01-10 | 唐山钢铁集团有限责任公司 | Metallographic sample preparation and display method for aluminum-silicon coated steel plate |
| CN112857950A (en) * | 2021-01-18 | 2021-05-28 | 燕山大学 | Metallographic corrosive agent for biphase medium manganese steel and metallographic structure display method |
Non-Patent Citations (1)
| Title |
|---|
| 刘晓强 等."690合金晶间腐蚀化学浸泡试验方法的适用性".《腐蚀与防护》.2016,第37期(第03期),第236-240页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113865953A (en) | 2021-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104878389B (en) | A kind of pure nickel metallographic etchant and its caustic solution | |
| CN110672397B (en) | Metallographic sample preparation and display method for aluminum-silicon coated steel plate | |
| CN103852358B (en) | The display packing of a kind of ultra low carbon IF thin plate metallographic structure | |
| CN103018141B (en) | High alloy low-carbon martensitic steels original grain developer and display packing | |
| CN110553892B (en) | Erosion method suitable for T/P91 and T/P92 steel | |
| CN112129755B (en) | Method for detecting martensite content in high-strength dual-phase steel | |
| CN110320074B (en) | Method for treating metallographic specimen with crack defect after etching | |
| CN107121322A (en) | The system display method of high-carbon high-alloy mould steel original austenite crystal prevention | |
| CN105510105A (en) | Method for rapidly determining phase content of double-phase stainless steel by using metallographic dyeing and software | |
| CN103993319A (en) | Corrosive agent and display method for macrostructure of aluminum and aluminum copper alloys | |
| CN105067414A (en) | System and method for observing hard alloy structure with scanning electron microscope | |
| CN113865953B (en) | Method for displaying and evaluating grain boundary carbide in low-carbon stamping steel by metallographic method | |
| CN109490302A (en) | A kind of test method of the austenite grain of midium-carbon steel martensitic structure | |
| CN105738184B (en) | The application method for the etchant that manganese steel austenite grain boundary is shown | |
| CN110749718A (en) | Dendritic crystal corrosive agent and corrosion method for maraging stainless steel | |
| CN112945688B (en) | Method for displaying silicon-rich phase three-dimensional structure in aluminum-silicon coating by metallographic method | |
| CN113155564B (en) | Analysis method for inclusions causing sand hole defects of stamping parts | |
| CN204988841U (en) | System for observe carbide tissue with scanning electron microscope | |
| CN112695323B (en) | Metallographic etching solution for austenitic stainless steel cold-rolled sheet and sample etching method | |
| CN113865966A (en) | Corrosive liquid for displaying aluminum-rich phase dendrite of aluminum-silicon layer and dendrite measurement method | |
| CN111595652A (en) | Coloring agent for identifying tissues in steel and method for identifying tissues in steel | |
| CN115011965B (en) | Corrosive liquid for detecting flaky silicon-rich phase of aluminum-silicon coating and detection method | |
| CN114778257B (en) | Convenient identification type color metallographic corrosion method for TA2 pure titanium | |
| CN114855168B (en) | Corrosive agent for displaying undissolved high alloy phase in steel and metallographic display method | |
| CN109001010B (en) | Corrosive agent and corrosion method for displaying initial austenite grain boundary of medium-low carbon steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |