CN103487309A - Method for displaying grain size of metal material - Google Patents
Method for displaying grain size of metal material Download PDFInfo
- Publication number
- CN103487309A CN103487309A CN201310378411.XA CN201310378411A CN103487309A CN 103487309 A CN103487309 A CN 103487309A CN 201310378411 A CN201310378411 A CN 201310378411A CN 103487309 A CN103487309 A CN 103487309A
- Authority
- CN
- China
- Prior art keywords
- metal material
- grain size
- wiping
- basis
- examination face
- 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.)
- Pending
Links
Images
Landscapes
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The invention relates to a method for displaying the grain size of a metal material, and relates to the field of analysis of metal materials. The method disclosed by the invention effectively inhibits the showing of the structure of the metal material by corroding the test surface of a metal material sample by combining the corrosion of picric acid and aqua regia, thereby displaying the grain boundary of the tested metal material clearly, integrally and accurately, providing the convenience for correctly evaluating the grain size, greatly increasing the working efficiency and providing accurate and reliable basis for the practical application of the tested metal material in national industrial and agricultural production and defense-related science and technology construction.
Description
[technical field]
The present invention relates to the Analysis of Metallic Materials field, relate in particular to a kind of method that shows the metal material grain size, be specifically related to a kind of method that shows the metal material grain size when metal material is done to metal lographic examination.
[background technology]
Known, when metal material is done to metal lographic examination, it is one of main project of metal lographic examination that grain size is detected, and according to the difference of wanting experimental material, the display packing of grain size is not identical yet, generally, general material is shown to the method for grain size is: while corroding carbon steel, with about 90 seconds of picric acid water-detergent solution (5g picric acid+10ml washing agent+200ml water) heat erosion or to trying the face burnt hair, after rinsing, with dry air, dry up; While corroding martensitic stain less steel, with after the heat erosion of potassium permanganate aqueous sulfuric acid is about 20 minutes with oxalic acid aqueous solution wiping examination face, clear water rinses and dries up etc. again afterwards.
For above-mentioned common material, with hot acid, corrode, just can well show crystal boundary; But for some special material, as: the materials such as hull steel, GS-80, by reference to the accompanying drawings 2, although these materials crystal boundary after adopting existing heat erosion has shown, but material structure also shows together simultaneously, and organize more outstanding than crystal boundary, make tissue cover crystal boundary, thereby cause certain difficulty to correctly evaluating grain size, just there will be slightly because of carelessness erroneous judgement, greatly reduce work efficiency, the inventor, by retrieval related data both domestic and external, does not all find the better corrosion method to materials such as hull steel, GS-80.
[summary of the invention]
In order to overcome the deficiency of above-mentioned technology, the invention provides a kind of method that shows the metal material grain size, the examination face that the present invention combines the corrosivity of picric acid and chloroazotic acid to metal material sample is corroded, effectively suppress manifesting of metal material tissue, realized highlighting the technique effect of crystal boundary, convenience is provided to correct evaluation grain size, greatly improved work efficiency, be also simultaneously tested metal material in China's industrial and agricultural production, foundation accurately and reliably is provided in the practical application of the development of defense-related science and technology.
For realizing goal of the invention as above, the present invention adopts technical scheme as described below:
A kind of method that shows the metal material grain size, described method specifically comprises the steps:
The first step, the metal material sample of at first needs being checked carry out the hot acid erosion to trying the face burnt hair, then with clear water, rinse examination face and dry up afterwards;
Second step, on the basis of the first step, examine under a microscope the examination face of metal material sample, see whether crystal boundary manifests, if do not manifested crystal boundary, repeat first step;
The 3rd step, on the basis of second step, the examination face of the metal material sample after corroding is carried out to metallurgical polishing, the crystal boundary and the tissue that show before jettisoning;
The 4th step, on the basis of the 3rd step, be bright grey with examination face to the specimen surface of chloroazotic acid wiping metal material sample;
The 5th step, on the basis of the 4th step, rinse with clear water after the examination face of metal material sample to dry up and get final product.
The method of described demonstration metal material grain size, the time of described chloroazotic acid wiping is:
When room temperature is-5～5 ℃, the wiping time is 5～15 seconds;
When room temperature is 5～15 ℃, the wiping time is 20～30 seconds;
When room temperature is 15～25 ℃, the wiping time is 35～45 seconds;
When room temperature is 25～35 ℃, the wiping time is 45～55 seconds;
Adopt technical scheme as above, the present invention has superiority as described below:
A kind of method that shows the metal material grain size of the present invention, the examination face that the present invention combines the corrosivity of picric acid and chloroazotic acid to metal material sample is corroded, effectively suppress manifesting of metal material tissue, realized clear, complete, as to show accurately tested metal material crystal boundary, convenience is provided to correct evaluation grain size, greatly improved work efficiency, be also simultaneously tested metal material in China's industrial and agricultural production, foundation accurately and reliably is provided in the practical application of the development of defense-related science and technology.
[accompanying drawing explanation]
Fig. 1 is the process flow diagram that the present invention shows grain size;
Fig. 2 adopts existing demonstration grain size method to show the schematic diagram of 980 crystalline grain of steel degree;
Fig. 3 adopts the existing schematic diagram that shows grain size method demonstration 925A crystalline grain of steel degree;
Fig. 4 adopts the present invention to show the schematic diagram of 925A crystalline grain of steel degree;
Fig. 5 adopts the existing schematic diagram that shows grain size method demonstration GS-80 crystalline grain of steel degree;
Fig. 6 adopts the present invention to show the schematic diagram of GS-80 crystalline grain of steel degree;
Fig. 7 adopts existing demonstration grain size method to show the schematic diagram of 785 high-strength steel grain sizes;
Fig. 8 adopts the present invention to show the schematic diagram of 785 high-strength steel grain sizes;
[embodiment]
Can explain in more detail the present invention by the following examples, the present invention is not limited to the following examples;
1 a kind of described method that shows the metal material grain size by reference to the accompanying drawings, described method specifically comprises the steps:
The first step, the metal material sample of at first needs being checked carry out the hot acid erosion to trying the face burnt hair, then with clear water, rinse examination face and dry up afterwards;
Second step, on the basis of the first step, examine under a microscope the examination face of metal material sample, see whether crystal boundary manifests, if do not manifested crystal boundary, repeat first step;
The 3rd step, on the basis of second step, the examination face of the metal material sample after corroding is carried out to metallurgical polishing, the crystal boundary and the tissue that show before jettisoning;
The 4th step, on the basis of the 3rd step, be bright grey with examination face to the specimen surface of chloroazotic acid wiping metal material sample, described chloroazotic acid claims again " king's acid ", the liquid that a kind of corrosivity is very strong, emit yellow cigarette, it is the potpourri that nitric acid (HNO3) and hydrochloric acid (HCl) form, wherein blending ratio is 1:3, and the time of described chloroazotic acid wiping is:
When room temperature is-5～5 ℃, the wiping time is 5～15 seconds;
When room temperature is 5～15 ℃, the wiping time is 20～30 seconds;
When room temperature is 15～25 ℃, the wiping time is 35～45 seconds;
When room temperature is 25～35 ℃, the wiping time is 45～55 seconds;
The 5th step, on the basis of the 4th step, rinse with clear water after the examination face of metal material sample to dry up and get final product.
For better explanation the present invention, the present invention selects following material to be tested as test material:
One, select the 925A steel as test material, concrete operation step is as follows:
The first step, first with the picric acid water-detergent solution, corrode the examination face of 925A steel sample, until the examination face of sample surface burnt hair, dry up after then with clear water, rinsing examination face;
Second step, on the basis of the first step, examine under a microscope the examination face of 925A steel sample, see whether crystal boundary manifests, if do not manifested crystal boundary, repeat first step;
The 3rd step, on the basis of second step, the examination face of the golden 925A steel sample after corroding is carried out to metallurgical polishing, the crystal boundary and the tissue that show before jettisoning;
The 4th step, on the basis of the 3rd step, be bright grey with examination face to the specimen surface of chloroazotic acid wiping 925A steel sample, the time of described chloroazotic acid wiping is: during experiment, room temperature is 15～25 ℃, the wiping time is 40 seconds;
The 5th step, on the basis of the 4th step, rinse with clear water after the examination face of 925A steel sample to dry up and get final product, concrete test findings accompanying drawing 4, wherein accompanying drawing 3 is for only to adopt the picric acid water-detergent solution to invade the grain size schematic diagram of rear demonstration;
Two, select the GS-80 steel as test material, concrete operation step is as follows:
The first step, first with the potassium permanganate aqueous sulfuric acid, corrode the examination face of GS-80 steel sample, until the examination face of sample surface burnt hair, dry up after then with clear water, rinsing examination face;
Second step, on the basis of the first step, examine under a microscope the examination face of GS-80 steel sample, see whether crystal boundary manifests, if do not manifested crystal boundary, repeat first step;
The 3rd step, on the basis of second step, the examination face of the golden GS-80 steel sample after corroding is carried out to metallurgical polishing, the crystal boundary and the tissue that show before jettisoning;
The 4th step, on the basis of the 3rd step, be bright grey with examination face to the specimen surface of chloroazotic acid wiping GS-80 steel sample, the time of described chloroazotic acid wiping is: during experiment, room temperature is 25～35 ℃, the wiping time is 50 seconds;
The 5th step, on the basis of the 4th step, rinse with clear water after the examination face of GS-80 steel sample to dry up and get final product, concrete test findings accompanying drawing 6, wherein accompanying drawing 5 is for only to adopt the picric acid water-detergent solution to invade the grain size schematic diagram of rear demonstration;
Three, select 785 high-strength steel as test material, concrete operation step is as follows:
The first step, first with the picric acid water-detergent solution, corrode the examination face of 785 high-strength steel samples, until the examination face of sample surface burnt hair, dry up after then with clear water, rinsing examination face;
Second step, on the basis of the first step, examine under a microscope the examination face of 785 high-strength steel samples, see whether crystal boundary manifests, if do not manifested crystal boundary, repeat first step;
The 3rd step, on the basis of second step, the examination face of the gold 785 high-strength steel samples after corroding is carried out to metallurgical polishing, the crystal boundary and the tissue that show before jettisoning;
The 4th step, on the basis of the 3rd step, be bright grey with examination face to the specimen surface of chloroazotic acid wiping 785 high-strength steel samples, the time of described chloroazotic acid wiping is: during experiment, room temperature is 15～25 ℃, the wiping time is 40 seconds;
The 5th step, on the basis of the 4th step, rinse with clear water after the examination face of 785 high-strength steel samples to dry up and get final product, concrete test findings accompanying drawing 8, wherein accompanying drawing 7 is for only to adopt the picric acid water-detergent solution to invade the grain size schematic diagram of rear demonstration;
Part not in the detailed description of the invention is prior art.
The embodiment selected in this article in order to disclose purpose of the present invention, currently think suitablely, still, will be appreciated that, the present invention is intended to comprise that all belong to all changes and the improvement of the embodiment in this design and invention scope.
Claims (2)
1. a method that shows the metal material grain size, it is characterized in that: described method specifically comprises the steps:
The first step, the metal material sample of at first needs being checked carry out the hot acid erosion to trying the face burnt hair, then with clear water, rinse examination face and dry up afterwards;
Second step, on the basis of the first step, examine under a microscope the examination face of metal material sample, see whether crystal boundary manifests, if do not manifested crystal boundary, repeat first step;
The 3rd step, on the basis of second step, the examination face of the metal material sample after corroding is carried out to metallurgical polishing, the crystal boundary and the tissue that show before jettisoning;
The 4th step, on the basis of the 3rd step, be bright grey with examination face to the specimen surface of chloroazotic acid wiping metal material sample;
The 5th step, on the basis of the 4th step, rinse with clear water after the examination face of metal material sample to dry up and get final product.
2. the method for demonstration metal material grain size according to claim 1, it is characterized in that: the time of described chloroazotic acid wiping is:
When room temperature is-5～5 ℃, the wiping time is 5～15 seconds;
When room temperature is 5～15 ℃, the wiping time is 20～30 seconds;
When room temperature is 15～25 ℃, the wiping time is 35～45 seconds;
When room temperature is 25～35 ℃, the wiping time is 45～55 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310378411.XA CN103487309A (en) | 2013-08-27 | 2013-08-27 | Method for displaying grain size of metal material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310378411.XA CN103487309A (en) | 2013-08-27 | 2013-08-27 | Method for displaying grain size of metal material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103487309A true CN103487309A (en) | 2014-01-01 |
Family
ID=49827704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310378411.XA Pending CN103487309A (en) | 2013-08-27 | 2013-08-27 | Method for displaying grain size of metal material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103487309A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062164A (en) * | 2014-06-30 | 2014-09-24 | 中国船舶重工集团公司第七二五研究所 | Erosion method of gold-phase metallographic structure of double-phase stainless steel |
| CN110132697A (en) * | 2019-06-20 | 2019-08-16 | 洛阳Lyc轴承有限公司 | A kind of caustic solution of bearing steel grain size |
| CN111751254A (en) * | 2020-07-13 | 2020-10-09 | 宁波江丰电子材料股份有限公司 | Method for testing granularity of high-purity aluminum alloy sample |
| CN114397166A (en) * | 2021-12-09 | 2022-04-26 | 阳江合金材料实验室 | Application of potassium permanganate corrosive agent in metallographic corrosion of high-carbon martensitic stainless steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353794A (en) * | 2008-09-03 | 2009-01-28 | 董加坤 | Austenitic stainless steel metallographic etchant, preparing method and use thereof |
| CN102103051A (en) * | 2011-01-13 | 2011-06-22 | 马鞍山钢铁股份有限公司 | Medium-high carbon steel actual grain size developer and developing method |
| CN102443803A (en) * | 2012-02-23 | 2012-05-09 | 中国船舶重工集团公司第七二五研究所 | Metallographic corrosion method for martensitic precipitation hardening stainless steel crystal boundary |
| CN102980794A (en) * | 2012-11-08 | 2013-03-20 | 中国船舶重工集团公司第七二五研究所 | Metallographic erosion method for displaying cobalt-chromium alloy structure |
-
2013
- 2013-08-27 CN CN201310378411.XA patent/CN103487309A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353794A (en) * | 2008-09-03 | 2009-01-28 | 董加坤 | Austenitic stainless steel metallographic etchant, preparing method and use thereof |
| CN102103051A (en) * | 2011-01-13 | 2011-06-22 | 马鞍山钢铁股份有限公司 | Medium-high carbon steel actual grain size developer and developing method |
| CN102443803A (en) * | 2012-02-23 | 2012-05-09 | 中国船舶重工集团公司第七二五研究所 | Metallographic corrosion method for martensitic precipitation hardening stainless steel crystal boundary |
| CN102980794A (en) * | 2012-11-08 | 2013-03-20 | 中国船舶重工集团公司第七二五研究所 | Metallographic erosion method for displaying cobalt-chromium alloy structure |
Non-Patent Citations (3)
| Title |
|---|
| 王岚等: "《金相实验技术》", 31 May 2010 * |
| 王英: "船体用钢奥氏体晶粒度显示方法", 《理化检验-物理分册》 * |
| 董加坤: "制作奥氏体不锈钢金相试样的高效侵蚀剂配方及使用方法", 《金属热处理》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062164A (en) * | 2014-06-30 | 2014-09-24 | 中国船舶重工集团公司第七二五研究所 | Erosion method of gold-phase metallographic structure of double-phase stainless steel |
| CN110132697A (en) * | 2019-06-20 | 2019-08-16 | 洛阳Lyc轴承有限公司 | A kind of caustic solution of bearing steel grain size |
| CN111751254A (en) * | 2020-07-13 | 2020-10-09 | 宁波江丰电子材料股份有限公司 | Method for testing granularity of high-purity aluminum alloy sample |
| CN114397166A (en) * | 2021-12-09 | 2022-04-26 | 阳江合金材料实验室 | Application of potassium permanganate corrosive agent in metallographic corrosion of high-carbon martensitic stainless steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103487309A (en) | Method for displaying grain size of metal material | |
| CN102517586B (en) | Corrosive agent for displaying 9% Cr steel original austenite grain boundary and application thereof | |
| CN105372246B (en) | For detecting the corrosive agent and its application method of austenitic stainless steel shot blasting on surface layer | |
| CN102507400B (en) | Quantitative analysis method for residual life of T91 steel pipes | |
| CN107747095B (en) | A kind of ni-fe-based alloy weld joint samples metallographic etching agent and application method | |
| CN107761100A (en) | Medium high carbon high-strength steel prior austenite grain size visualizingre agent and its application method | |
| CN102590069B (en) | Test sample used in stainless steel corrosion test and fabrication method thereof | |
| CN103134751B (en) | The method of metal erosion detection and assessment | |
| CN103018141B (en) | High alloy low-carbon martensitic steels original grain developer and display packing | |
| CN102443803A (en) | Metallographic corrosion method for martensitic precipitation hardening stainless steel crystal boundary | |
| CN103792128A (en) | Method for displaying two-phase grain boundary of duplex stainless steel | |
| CN101701886A (en) | Metallographical corrosive, method for eroding copper and method for displaying metallographical organization of copper | |
| CN105018931A (en) | GH3030 high-temperature alloy as-cast metallographic etchant and preparing method and using method thereof | |
| CN105510105A (en) | Method for rapidly determining phase content of double-phase stainless steel by using metallographic dyeing and software | |
| CN100519843C (en) | Composite etchant for 409L ferritic stainless steel and use method thereof | |
| CN103983502A (en) | Metallographic corrosion method for clearly displaying 9-12% Cr heat-resistant steel original austenite grain boundary | |
| CN107574439B (en) | Etching agent for displaying original austenite grain boundary of FB2 steel, preparation method and application | |
| CN104977299A (en) | Method for displaying P91 and P92 ferrite heat-resistant steel original austenite crystal boundary | |
| CN105420731A (en) | Metallographic corrosion liquid suitable for displaying quenching state grain boundaries of multiple types of steel workpieces and preparation method thereof | |
| CN104122195A (en) | Detection liquid for detecting corrosion resistance of surface passivation film of tinned steel plate | |
| CN105177577A (en) | Corrosion method for small-specification red copper rod | |
| CN103499480B (en) | A kind of etching pit method showing austenitic stainless steel grain boundary | |
| CN102435484B (en) | Method for corroding previous particle boundary (PPB) of powdery high-temperature alloy | |
| CN101149248A (en) | Method for continuously monitoring metal material corrosion depth | |
| CN104651841A (en) | Corrosive liquid and corrosion method for performing metallographic analysis on nitrided 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 | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140101 |