CN103792128A - Method for displaying two-phase grain boundary of duplex stainless steel - Google Patents
Method for displaying two-phase grain boundary of duplex stainless steel Download PDFInfo
- Publication number
- CN103792128A CN103792128A CN201410059302.6A CN201410059302A CN103792128A CN 103792128 A CN103792128 A CN 103792128A CN 201410059302 A CN201410059302 A CN 201410059302A CN 103792128 A CN103792128 A CN 103792128A
- Authority
- CN
- China
- Prior art keywords
- sample
- metallographic
- sightingpiston
- stainless steel
- phase
- 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.)
- Granted
Links
Images
Abstract
The invention relates to a method for displaying two-phase grain boundary of duplex stainless steel. The method comprises the following steps: I, preparation of a metallographic sample, namely, (1) cutting the metallographic sample by adopting a machining saw; (2) roughly grinding the observation surface of the sample; (3) mechanically polishing the observation surface of the sample by adopting a metallographic polishing machine; (4) finely polishing the observation surface by the metallographic polishing machine; (5) cleaning the observation surface of the sample with ethyl alcohol; II, preparation of a corrosive agent, namely, preparing a mixed solution from 10-15g of copper sulfate, 50 mm <3> of nitric acid with the volume percentage being 65-68% and 100-150 mm <3> of hydrochloric acid with the volume percentage being 36-38%; III, corrosion of the metallographic sample, namely, putting the metallographic sample into a metallographic corrosive agent, taking out the duplex stainless steel when the metallographic observation surface is corroded to be deep silver gray, cleaning the sample with water, and wiping the observation surface of the metallographic sample by degreasing cotton dipped with absolute ethyl alcohol. The method for displaying two-phase grain boundary of duplex stainless steel can be used for quickly, simply and conveniently displaying the two-phase grain boundary of the duplex stainless steel.
Description
Technical field
The present invention relates to a kind of method of the two-phase crystal boundary that shows two phase stainless steel.
Background technology
Two phase stainless steel also claims ferritic-austenitic stainless steel, has many features of ferritic steel and austenitic steel concurrently, is widely used in acid-soluble oil, gas field and transportation, oil refining, petrochemical complex and oceanographic engineering field.In two phase stainless steel is produced, often need the metallographic structure of experimental material, then reach desirable performance by suitable adjusting component and production technology.When check, general 10% oxalic acid aqueous solution electrolysis, the method such as basic iron potassium cyanide solution and 40% NaOH (potassium) electrolysis of solutions heat or that boil of adopting, these methods can show the phase boundary of austenite and ferrite, carrying out mensuration and the precipitated phase of phase ratio observes, shortcoming is requirement instrumentation, time-consuming and need electricity, the two-phase crystal boundary that particularly can not show two phase stainless steel, carries out the observation of grain size.
Summary of the invention
In order to overcome the above-mentioned deficiency of method of two-phase crystal boundary of existing demonstration two phase stainless steel, the invention provides a kind of method of two-phase crystal boundary of quick, easy demonstration two phase stainless steel, profit can corrode the crystal boundary of austenite and ferrite two-phase in two phase stainless steel metallographic structure in this way in the short period of time simultaneously, observes grain size.
For achieving the above object, the present invention has taked following technical scheme.
The method of the two-phase crystal boundary of this demonstration two phase stainless steel comprises following step successively:
The preparation of I, metallographic sample
(1) metallographic specimen is got in machine work sawing, sample size will be applicable to metallographic observation, be generally the right cylinder of 15 × 20 millimeters of φ or the cube of 15 × 10 × thickness (millimeter), when sampling, must prevent that Yin Wendu from raising and causing that microstructure changes or causes plastic yield because of stressed.
(2) on abrasive machine, polish off wedge angle and the corner angle of metallographic sample, the sightingpiston of sample is roughly ground.
(3) adopt metallic phase polisher milling to carry out mechanical buffing, carry out fine grinding sightingpiston with 240#, 600# and 1000# abrasive paper for metallograph respectively, every one fine grinding all will be eliminated a procedure and stay the polishing scratch of sightingpiston, with the sightingpiston of the timely washed samples of clear water, avoid at sightingpiston kish abrasive dust simultaneously.
(4) adopt metallic phase polisher milling to carry out essence to sightingpiston and throw, use woollen cloth or velveting, adopting successively granularity is the efficient metallurgical polishing agent of 5 μ and 1 μ, controls humidity and dynamics when polishing well, after polishing the sightingpiston of sample smooth, without deformation layer, no marking.
(5) with alcohol washed samples sightingpiston, confirmation sample is treated planation surface cleanliness without any pollution.
II, mordant preparation
Mordant preparation will be carried out in draughty fuming cupboard, and balance takes copper sulphate 10g-15g, and measuring respectively percent by volume with graduated cylinder is 65% ~ 68% nitric acid 50 mm
3with percent by volume hydrochloric acid 100 ~ 150 mm that are 36% ~ 38%
3preparation mixed solution, measures 1 ~ 2 mm with dropper
3hydrofluorite join in mixed solution, then the solution preparing is stirred with glass bar, after leaving standstill, can use.
III, etching pit
The metallographic specimen preparing is put into the metallographic etching agent preparing with bamboo clip or tweezers, sightingpiston is immersed in etchant completely, sightingpiston upwards, is observed the change color of specimen surface simultaneously.In the time that metallographic observation face is etched to darker silver gray, with bamboo clip or tweezers taking-up two phase stainless steel sample, by the abundant washed samples of mobile water flowing, finally dip absolute ethyl alcohol wiped clean metallographic sample sightingpiston with absorbent cotton at once, use hot blast drying.
Owing to adopting technique scheme, the present invention has outstanding technique effect:
1, two-phase structure's ferrite of two phase stainless steel and austenitic crystal boundary clear demonstration simultaneously, optical microphotograph Microscopic observation erosion effect is splendid.
2, the pollution that the non-corrosive product of sightingpiston corroding through this mordant brings, has obtained good microstructure observation's effect.
3, the mordant that simultaneously the present invention adopts has certain chemical polishing effect, can eat away cut that sample sightingpiston is thinner and to a certain degree can reach the effect of chemical polishing.
4, corrosion method of the present invention can be used for observing Recovery and recrystallization and the grain growth situation of two phase stainless steel ferrite and austenite two-phase structure after different solution annealing temperature, and the common corrosion method of this point does not reach.
Accompanying drawing explanation
Fig. 1 is the metallographic structure photo of super-duplex stainless steel 2906 As rolleds, and the key character of tissue is that after thermal deformation, ferrite and austenite two-phase structure are fibrous along rolling direction.
Fig. 2-6 are respectively super-duplex stainless steel 2906 ferrite and the Recovery and recrystallization of austenite two-phase structure and metallographic structure photos of grain growth situation after different solution annealing of As rolled, along with the rising of solution annealing temperature, preferentially there is recovery and recrystallization as Fig. 2 at 950 ℃ of ferritic phases, austenite left backly starts to occur recrystallization as Fig. 3 at 1000 ℃, to 1050 ℃ of ferrites and austenite two-phase generation perfect recrystallization as Fig. 4; Along with the continuation of temperature raises, the crystal grain of ferrite and austenite two-phase all can be grown up in various degree, but ferritic grain size will obviously be greater than austenite crystal as Fig. 5,6, and Fig. 5 is 1150 ℃ of solid solutions, and Fig. 6 is 1200 ℃ of solid solutions.
Embodiment
Below in conjunction with example, the invention will be further described, but the two-phase stainless Steel material that is specifically suitable for of the present invention is not only confined to the steel grade of choosing in example below.
Embodiment
The material of choosing is super-duplex stainless steel material 2906 sheet materials, and specific chemical composition (mass percent %) is:
C 0.018， Si 0.56， Mn 0.96， Cr 29.38，
Ni 6.62， Mo 2.2， N 0.34，
Surplus is Fe and inevitable impurity.
Steel plate gauge thickness is 15 millimeters, and metallographic specimen size is the square of 15 × 10 × 15 millimeters, and state is As rolled solid solubility temperatures annealing different from process, and metallurgical analysis apparatus model is Lei DM4000.
The concrete operation step of the present embodiment is as follows:
The preparation of I, metallographic sample
(1) metallographic specimen is got in machine work sawing, sample size will be applicable to metallographic observation, be generally the right cylinder (or cube of 15 × 10 × 20 millimeters) of 15 × 20 millimeters of φ, when sampling, must prevent that Yin Wendu from raising and causing that microstructure changes or causes plastic yield because of stressed.
(2) on abrasive machine, polish off the unwanted wedge angle of metallographic sample and corner angle, the sightingpiston of sample is roughly ground with 120# abrasive paper for metallograph.
(3) adopt metallic phase polisher milling to carry out mechanical buffing, carry out fine grinding sightingpiston with 240#, 600# and 1000# abrasive paper for metallograph respectively, every one fine grinding all will be eliminated the polishing scratch that a procedure stays, and simultaneously with the sightingpiston of the timely washed samples of clear water, avoids at sightingpiston kish abrasive dust.
(4) adopt metallic phase polisher milling to carry out essence to sightingpiston and throw, use woollen cloth or velveting, adopting successively granularity is the efficient metallurgical polishing agent of 5 μ and 1 μ, controls humidity and dynamics when polishing well, after polishing the sightingpiston of sample smooth, without deformation layer, no marking.
(5), with alcohol washed samples surface, confirm to be seen cleanliness without any pollution of sample.
II, mordant preparation
Mordant preparation will be carried out in draughty fuming cupboard, weigh in the balance and get copper sulphate 10g, measuring respectively percent by volume with graduated cylinder is 100 milliliters of preparation mixed solutions of hydrochloric acid that 50 milliliters, 65% nitric acid and percent by volume are 36%, the hydrofluorite that measures 1 ~ 2 milliliter with dropper joins in mixed solution, with glass bar, the solution preparing is stirred again, after leaving standstill, can use.
III, etching pit
The metallographic specimen preparing is put into the metallographic etching agent preparing with bamboo clip or tweezers, sightingpiston is immersed in etchant completely, sightingpiston upwards, is observed the change color of specimen surface simultaneously.In the time that metallographic observation face is etched to darker silver gray, take out two phase stainless steel sample with bamboo clip or tweezers, use at once the abundant washed samples of mobile water, finally dip absolute ethyl alcohol wiped clean metallographic sample sightingpiston with absorbent cotton, use hot blast drying.
Claims (2)
1. show a method for the two-phase crystal boundary of two phase stainless steel, it comprises following step successively:
The preparation of I metallographic sample
(1) metallographic specimen is got in machine work sawing, and sample size will be applicable to metallographic observation, must prevent that Yin Wendu from raising and cause that microstructure changes or cause plastic yield because of stressed when sampling;
(2) on abrasive machine, polish off wedge angle and the corner angle of metallographic sample, the sightingpiston of sample is roughly ground;
(3) adopt metallic phase polisher milling to carry out mechanical buffing, carry out fine grinding sightingpiston with 240#, 600# and 1000# abrasive paper for metallograph respectively, every one fine grinding all will be eliminated a procedure and stay the polishing scratch of sightingpiston, with the sightingpiston of the timely washed samples of clear water, avoid at sightingpiston kish abrasive dust simultaneously;
(4) adopt metallic phase polisher milling to carry out essence to sightingpiston and throw, use woollen cloth or velveting, adopting successively granularity is the efficient metallurgical polishing agent of 5 μ and 1 μ, controls humidity and dynamics when polishing well, after polishing the sightingpiston of sample smooth, without deformation layer, no marking;
(5) with alcohol washed samples sightingpiston, confirmation sample is treated planation surface cleanliness without any pollution;
The preparation of II mordant
Mordant is formulated in draughty fuming cupboard and carries out, and balance takes copper sulphate 10g-15g, and measuring respectively percent by volume with graduated cylinder is 65% ~ 68% nitric acid 50 mm
3with percent by volume hydrochloric acid 100 ~ 150 mm that are 36% ~ 38%
3preparation mixed solution, measures 1 ~ 2 mm with dropper
3hydrofluorite join in mixed solution, then the solution preparing is stirred with glass bar, after leaving standstill, can use;
III etching pit
The metallographic specimen preparing is put into the metallographic etching agent preparing with bamboo clip or tweezers, sightingpiston is immersed in etchant completely, sightingpiston upwards, is observed the change color of specimen surface simultaneously;
in the time that metallographic observation face is etched to darker silver gray, with bamboo clip or tweezers taking-up two phase stainless steel sample, by the abundant washed samples of mobile water flowing, dip absolute ethyl alcohol wiped clean metallographic sample sightingpiston with absorbent cotton at once, use hot blast drying.
2. the method for the two-phase crystal boundary of demonstration two phase stainless steel according to claim 1, is characterized in that: in the time of the preparation of step I metallographic sample, sample is (15 ± 1 millimeters of φ
220 ± 1 millimeters of) × () right cylinder or (15 ± 1 millimeters
210 ± 1 millimeters of) × () cube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410059302.6A CN103792128B (en) | 2014-02-21 | 2014-02-21 | A kind of method of the biphase crystal boundary showing two phase stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410059302.6A CN103792128B (en) | 2014-02-21 | 2014-02-21 | A kind of method of the biphase crystal boundary showing two phase stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103792128A true CN103792128A (en) | 2014-05-14 |
| CN103792128B CN103792128B (en) | 2016-08-24 |
Family
ID=50668004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410059302.6A Active CN103792128B (en) | 2014-02-21 | 2014-02-21 | A kind of method of the biphase crystal boundary showing two phase stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103792128B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233301A (en) * | 2014-09-24 | 2014-12-24 | 西安交通大学 | Metallographic etchant used for HR-2 antihydrogen steel, and preparation method and corrosion method of metallographic etchant |
| CN106092710A (en) * | 2016-06-22 | 2016-11-09 | 东方电气集团东方锅炉股份有限公司 | Austenite and the display packing of ferrite dissimilar steel joint metallographic structure |
| CN107478486A (en) * | 2017-07-21 | 2017-12-15 | 北京科技大学 | A kind of method of display Fe Mn Al C low density steel original grain boundaries |
| 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 |
| CN108004549A (en) * | 2018-01-05 | 2018-05-08 | 华北电力科学研究院有限责任公司 | The metallographic etchant and caustic solution of ferrite/austenite Dissimilar Steel Welded Joint |
| CN108426883A (en) * | 2018-03-22 | 2018-08-21 | 钢铁研究总院 | A kind of aggressive agent and corrosion method of two phase stainless steel |
| CN109490302A (en) * | 2018-11-11 | 2019-03-19 | 上海电气上重铸锻有限公司 | A kind of test method of the austenite grain of midium-carbon steel martensitic structure |
| CN110608937A (en) * | 2019-09-26 | 2019-12-24 | 江苏省沙钢钢铁研究院有限公司 | Metallographic corrosive agent for stainless steel high-temperature quenching structure and corrosion method thereof |
| CN111077005A (en) * | 2020-01-03 | 2020-04-28 | 昆明理工大学 | Method for displaying thermal deformation recrystallization grain boundary of duplex stainless steel |
| CN112730171A (en) * | 2020-12-30 | 2021-04-30 | 成都市海瑞产品质量技术检测有限公司 | Grain size detection method for low-carbon high-alloy material |
| CN113340698A (en) * | 2021-06-24 | 2021-09-03 | 北京工业大学 | Etchant for zirconium alloy metallographic structure observation and method for preparing zirconium alloy metallographic sample |
| CN114808095A (en) * | 2022-04-06 | 2022-07-29 | 长春工业大学 | Electrolytic etching method for displaying two-phase structure and grain boundary of duplex stainless steel |
| CN115323378A (en) * | 2022-08-18 | 2022-11-11 | 西安热工研究院有限公司 | Metallographic corrosive agent for displaying sliding band of austenitic material and preparation method and application method thereof |
| CN115323378B (en) * | 2022-08-18 | 2024-04-26 | 西安热工研究院有限公司 | Metallographic corrosive agent for displaying sliding band of austenitic material, and preparation method and use method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001069198A2 (en) * | 2000-03-17 | 2001-09-20 | Capcis Limited | Assessing steels for undesirable phases |
| CN101760742A (en) * | 2009-12-31 | 2010-06-30 | 西安热工研究院有限公司 | Austenitic steel deformation layer and preparation and application method of etchant displayed in matrix structure |
| CN102011119A (en) * | 2010-09-17 | 2011-04-13 | 马鞍山钢铁股份有限公司 | Dual-phase steel color metallographic coloring agent and color display method thereof |
| CN102721593A (en) * | 2012-06-27 | 2012-10-10 | 北京科技大学 | Method for displaying original austenitic grain boundary of martensitic heat-resistant steel |
| 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 |
| CN103411815A (en) * | 2013-07-31 | 2013-11-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for measuring martensite content in heat rolling dual-phase steel |
| CN103499480A (en) * | 2013-09-30 | 2014-01-08 | 南昌航空大学 | Metallographic phase corrosion method displaying austenitic stainless steel grain boundary |
-
2014
- 2014-02-21 CN CN201410059302.6A patent/CN103792128B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001069198A2 (en) * | 2000-03-17 | 2001-09-20 | Capcis Limited | Assessing steels for undesirable phases |
| CN101760742A (en) * | 2009-12-31 | 2010-06-30 | 西安热工研究院有限公司 | Austenitic steel deformation layer and preparation and application method of etchant displayed in matrix structure |
| CN102011119A (en) * | 2010-09-17 | 2011-04-13 | 马鞍山钢铁股份有限公司 | Dual-phase steel color metallographic coloring agent and color display method thereof |
| 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 |
| CN102721593A (en) * | 2012-06-27 | 2012-10-10 | 北京科技大学 | Method for displaying original austenitic grain boundary of martensitic heat-resistant steel |
| CN103411815A (en) * | 2013-07-31 | 2013-11-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for measuring martensite content in heat rolling dual-phase steel |
| CN103499480A (en) * | 2013-09-30 | 2014-01-08 | 南昌航空大学 | Metallographic phase corrosion method displaying austenitic stainless steel grain boundary |
Non-Patent Citations (4)
| Title |
|---|
| 刘持森: "双相不锈钢中相含量的精确测定", 《山东理工大学学报（自然科学版）》 * |
| 国家技术监督局: "《中华人民共和国国家标准 金属显微组织检验方法 GB/T 13298-91》", 1 October 1992 * |
| 张红霞 等: "双相不锈钢材料的常用化学浸蚀剂", 《材料热处理技术》 * |
| 李雪峰 等: "双相不锈钢彩色显微组织的显现方法", 《热处理》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233301A (en) * | 2014-09-24 | 2014-12-24 | 西安交通大学 | Metallographic etchant used for HR-2 antihydrogen steel, and preparation method and corrosion method of metallographic etchant |
| CN106092710A (en) * | 2016-06-22 | 2016-11-09 | 东方电气集团东方锅炉股份有限公司 | Austenite and the display packing of ferrite dissimilar steel joint metallographic structure |
| CN106092710B (en) * | 2016-06-22 | 2018-08-10 | 东方电气集团东方锅炉股份有限公司 | The display methods of austenite and ferrite dissimilar steel joint metallographic structure |
| CN107478486A (en) * | 2017-07-21 | 2017-12-15 | 北京科技大学 | A kind of method of display Fe Mn Al C low density steel original grain boundaries |
| 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 |
| CN108004549A (en) * | 2018-01-05 | 2018-05-08 | 华北电力科学研究院有限责任公司 | The metallographic etchant and caustic solution of ferrite/austenite Dissimilar Steel Welded Joint |
| CN108426883B (en) * | 2018-03-22 | 2019-09-27 | 钢铁研究总院 | A kind of aggressive agent and corrosion method of two phase stainless steel |
| CN108426883A (en) * | 2018-03-22 | 2018-08-21 | 钢铁研究总院 | A kind of aggressive agent and corrosion method of two phase stainless steel |
| CN109490302A (en) * | 2018-11-11 | 2019-03-19 | 上海电气上重铸锻有限公司 | A kind of test method of the austenite grain of midium-carbon steel martensitic structure |
| CN110608937A (en) * | 2019-09-26 | 2019-12-24 | 江苏省沙钢钢铁研究院有限公司 | Metallographic corrosive agent for stainless steel high-temperature quenching structure and corrosion method thereof |
| CN111077005A (en) * | 2020-01-03 | 2020-04-28 | 昆明理工大学 | Method for displaying thermal deformation recrystallization grain boundary of duplex stainless steel |
| CN112730171A (en) * | 2020-12-30 | 2021-04-30 | 成都市海瑞产品质量技术检测有限公司 | Grain size detection method for low-carbon high-alloy material |
| CN112730171B (en) * | 2020-12-30 | 2022-12-09 | 成都市海瑞产品质量技术检测有限公司 | Grain size detection method for low-carbon high-alloy material |
| CN113340698A (en) * | 2021-06-24 | 2021-09-03 | 北京工业大学 | Etchant for zirconium alloy metallographic structure observation and method for preparing zirconium alloy metallographic sample |
| CN114808095A (en) * | 2022-04-06 | 2022-07-29 | 长春工业大学 | Electrolytic etching method for displaying two-phase structure and grain boundary of duplex stainless steel |
| CN115323378A (en) * | 2022-08-18 | 2022-11-11 | 西安热工研究院有限公司 | Metallographic corrosive agent for displaying sliding band of austenitic material and preparation method and application method thereof |
| CN115323378B (en) * | 2022-08-18 | 2024-04-26 | 西安热工研究院有限公司 | Metallographic corrosive agent for displaying sliding band of austenitic material, and preparation method and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103792128B (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103792128A (en) | Method for displaying two-phase grain boundary of duplex stainless steel | |
| CN107014661B (en) | A kind of caustic solution showing high nitrogen martensitic stain less steel original austenite crystal boundary | |
| CN101995349B (en) | Corrosion agent of high-steel-level pipeline steel metallographic structure and display method | |
| CN101701886B (en) | Metallographical corrosive, method for eroding copper and method for displaying metallographical organization of copper | |
| CN103018141B (en) | High alloy low-carbon martensitic steels original grain developer and display packing | |
| CN106092710B (en) | The display methods of austenite and ferrite dissimilar steel joint metallographic structure | |
| CN105002498A (en) | GH625 high-temperature alloy metallographic etchant and preparation and application method thereof | |
| CN104562012A (en) | Iron-base high-temperature alloy sample metallographic etching solution and etching method | |
| CN102721593A (en) | Method for displaying original austenitic grain boundary of martensitic heat-resistant steel | |
| CN104977299B (en) | A kind of method for showing P91, P92 ferritic heat-resistant steel original austenite crystal prevention | |
| CN101880881A (en) | High aluminum zinc alloy etching agent and use method thereof | |
| CN104805440B (en) | The corrosive agent and display methods of superstrength alloy structural steel original austenite crystal boundary | |
| CN104404520A (en) | Metallographic structure etching solution of high-nitrogen stainless steel and metallographic etching method | |
| CN102534449A (en) | Hot-dip galvanizing method for Q460 steel pipe | |
| CN105547795A (en) | Display method of original austenite crystal boundary of steel for making Co containing type ultra-supercritical set | |
| CN108396321B (en) | Metallographic corrosive liquid for austenitic stainless steel and preparation corrosion method thereof | |
| CN110749718A (en) | Dendritic crystal corrosive agent and corrosion method for maraging stainless steel | |
| CN110389129A (en) | For showing the corrosive agent and its etching method of 690 nickel-base alloy deposited metal crystal boundaries | |
| CN111811912A (en) | Metallographic corrosion method for high-carbon martensitic stainless steel grain boundary | |
| CN105241885A (en) | Forged magnetically soft alloy 1J50 alloy metallographic corrosive liquid and applications thereof | |
| CN104233301A (en) | Metallographic etchant used for HR-2 antihydrogen steel, and preparation method and corrosion method of metallographic etchant | |
| CN112304732B (en) | Low-density steel original austenite grain boundary display method and application | |
| CN108760439B (en) | Metallographic phase sample preparation method for CrMo steel | |
| CN102808180A (en) | Solution and method for chemical machining of ei768 stainless steel workpiece | |
| CN108426883A (en) | A kind of aggressive agent and corrosion method of two phase stainless steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |