CN103743615A - Medium/low-alloy heat-resistant steel metallographic phase polishing etching reagent and treatment method thereof - Google Patents
Medium/low-alloy heat-resistant steel metallographic phase polishing etching reagent and treatment method thereof Download PDFInfo
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- CN103743615A CN103743615A CN201410031472.3A CN201410031472A CN103743615A CN 103743615 A CN103743615 A CN 103743615A CN 201410031472 A CN201410031472 A CN 201410031472A CN 103743615 A CN103743615 A CN 103743615A
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Abstract
The invention relates to a medium/low-alloy heat-resistant steel metallographic phase polishing etching reagent. The method comprises the following steps: polishing a medium/low-alloy heat-resistant steel sample, and wiping the surface of the polished medium/low-alloy heat-resistant steel sample for 5-10 seconds for performing chemical polishing and etching by dipping in the medium/low-alloy heat-resistant steel metallographic phase polishing etching reagent through an absorbent ball, so that a microscopic metallographic structure is represented; and observing, shooting and evaluating the obtained microscopic metallographic structure sample under an optical metallographic microscope. The polishing etching reagent comprises the following raw materials in parts by volume: 22.5-27.5 parts of distilled water, 13.5-16.5 parts of hydrogen peroxide, 0.9-1.1 parts of hydrofluoric acid and 1.8-2.2 parts of nitric acid. The medium/low-alloy heat-resistant steel metallographic phase polishing etching reagent in the invention is scientific and reasonable in formula, the preparation method is simple and feasible, the process flow of medium/low-alloy heat-resistant steel metallographic detection is simplified, the metallographic detection efficiency of the medium/low-alloy heat-resistant steel is improved, display of the medium/low-alloy heat-resistant steel metallographic structure is not influenced, and the structure is clear and is not in a pseudo phase.
Description
Technical field
The present invention relates to a kind of in, Mayari metallurgical polishing etchant and disposal route thereof, belong to metallographic sample technical field.
Background technology
In, low alloy steel is for carbon steel, on the basis of carbon steel, in order to improve one or more performances of steel, and in the steel that has a mind, add one or more alloying elements, when the alloy amount adding surpasses the general content that the normal production method of carbon steel has, claim that this steel is alloy steel, when alloy total amount is called low alloy steel lower than 3.5% time, alloy content is called medium alloy steel between 3.5-10% time.
Heat-resisting steel refers under hot conditions, has the alloy steel of inoxidizability and enough elevated temperature strength and good heat resistance.It comprises oxidation resistant steel (or claiming high temperature non-scaling steel) and refractory steel two classes.The good chemical stability of oxidation resistant steel General Requirements, but the load of bearing is lower.The elevated temperature strength that refractory steel is had relatively high expectations and corresponding inoxidizability.Heat-resisting steel is usually used in manufacturing the parts of at high temperature working in the industrial sectors such as boiler, steam turbine, power machine, industrial furnace and aviation, petrochemical complex.The working temperature of heat-resisting steel is higher, and the variation of the metallographic structure of steel inside in use can occur, as separating out of the separating out of carbonide, gathering, nodularization and cenotype.Along with life-span of various parts and heatproof require to become harsher, be safety, the reliability that guarantees actual parts, adopt merely mechanical property and visual testing to judge whether part lost efficacy can not meet and detect the requirement that part quality detects.
Metal lographic examination is the important method of research metal and alloy microstructure, evaluation product quality, is also the Main Means that metallic article is carried out defect analysis and military service member carried out to failure analysis simultaneously.By metal material is carried out to metallographic detection, can directly observe its microstructure, judge its organize whether normal, whether aging performance serious.Metallographic detects and conventionally adopts four steps, and successively: polishing, polishing, etch, observation are taken pictures, and step is more, efficiency is lower, sense cycle is longer.
Summary of the invention
For solving above technical deficiency, the invention provides a kind of in, Mayari metallurgical polishing etchant and disposal route thereof, polish attack agent of the present invention has polishing, two kinds of effects of etch simultaneously.In assurance, do not affect under the prerequisite of metallographic structure observing effect, polishing, etch are carried out simultaneously, improved metallographic detection efficiency.
The present invention is achieved by the following measures:
In, a Mayari metallurgical polishing etchant, it is characterized in that, by the raw material of following volume parts, formed:
22.5 ~ 27.5 parts of distilled water;
13.5 ~ 16.5 parts of hydrogen peroxide;
0.9 ~ 1.1 part, hydrofluorite;
1.8 ~ 2.2 parts, nitric acid.
The present invention is preferred, and the mass percentage concentration of described hydrogen peroxide is 27 ~ 35%, the mass percentage concentration 38 ~ 42% of described hydrofluorite, and the mass percentage concentration of described nitric acid is 65 ~ 68%.
Further preferred, the mass percentage concentration of described hydrogen peroxide is 30%, and the mass percentage concentration of described hydrofluorite is 40%, and the mass percentage concentration of described nitric acid is 68%.
According to the present invention, a kind of in, Mayari metallurgical polishing etchant, preferred, by the raw material of following volume parts, formed:
24.5 ~ 25.5 parts of distilled water;
14.5 ~ 15.5 parts of the hydrogen peroxide of mass percentage concentration 30%;
0.9 ~ 1 part, the hydrofluorite of mass percentage concentration 40%;
1.9 ~ 2.1 parts, the nitric acid of mass percentage concentration 68%.
According to the present invention, a kind of in, Mayari metallurgical polishing etchant, preferred, raw material is composed as follows:
Distilled water 25.5ml;
The hydrogen peroxide 14.5ml of mass percentage concentration 30%;
The hydrofluorite 1ml of mass percentage concentration 40%;
The nitric acid 2ml of mass percentage concentration 68%.
The preparation method of described polish attack agent is, gets hydrogen peroxide, hydrofluorite, nitric acid and the distilled water of above-mentioned volume parts, makes it to mix, obtain of the present invention in, Mayari metallurgical polishing etchant.
Use above-mentioned in, the Mayari metallurgical polishing etchant disposal route of carrying out metallographic detection, comprise the steps:
(1) polishing: first by, Mayari sample polishing removes surperficial oxide skin, then to specimen surface roughly grind, fine grinding, until be milled to 600# abrasive paper for metallograph, sample plane was seized is without scar and local dent, obtain surface-brightening in, Mayari sample;
(2) polish attack: by after step (1) polishing, Mayari sample with rayon balls, dip in, Mayari metallographic structure detects polish attack agent in specimen surface wiping 5 ~ 10 seconds repeatedly, then with clear water or absolute ethyl alcohol, rinse the polish attack agent of removing specimen surface, under room temperature, dry up;
(3) observe and take pictures: by process the metallographic microstructure sample obtaining through above-mentioned steps, under optical metallographic microscope, observe, take pictures, evaluate.
The invention has the beneficial effects as follows:
In of the present invention, Mayari metallurgical polishing etchant scientific formulation is reasonable, compound method simple possible, in having simplified, the technological process that detects of Mayari metallographic, in having improved, the metallographic detection efficiency of Mayari, in not affecting simultaneously, the demonstration of Mayari metallographic structure, it is clear without false appearance to guarantee to organize.
Embodiment
embodiment 1
In, a Mayari metallurgical polishing etchant, material component is as follows:
Distilled water 50ml;
The hydrogen peroxide 30ml of mass percentage concentration 30%;
The hydrofluorite 2ml of mass percentage concentration 40%;
The nitric acid 4ml of mass percentage concentration 68%.
By the hydrogen peroxide of above-mentioned metering, hydrofluorite, nitric acid, join in the distilled water of above-mentioned metering and mix, in obtaining, Mayari metallurgical polishing etchant.
embodiment 2
In, a Mayari metallurgical polishing etchant, material component is as follows:
Distilled water 23.5ml;
The hydrogen peroxide 13.8ml of mass percentage concentration 30%;
The hydrofluorite 0.9ml of mass percentage concentration 40%;
The nitric acid 1.9ml of mass percentage concentration 68%.
By the hydrogen peroxide of above-mentioned metering, hydrofluorite, nitric acid, join in the distilled water of above-mentioned metering and mix, in obtaining, Mayari metallurgical polishing etchant.
embodiment 3
In, a Mayari metallurgical polishing etchant, material component is as follows:
Distilled water 25.5ml;
The hydrogen peroxide 14.5ml of mass percentage concentration 30%;
The hydrofluorite 1ml of mass percentage concentration 40%;
The nitric acid 2ml of mass percentage concentration 68%.
By the hydrogen peroxide of above-mentioned metering, hydrofluorite, nitric acid, join in the distilled water of above-mentioned metering and mix, in obtaining, Mayari metallurgical polishing etchant.
embodiment 4
Use described in embodiment 1 in, the Mayari metallurgical polishing etchant disposal route of carrying out metallographic detection, comprise the steps:
(1) polishing: first by, surperficial oxide skin is removed in electric grinding machine polishing for Mayari sample, then with sanding machine to specimen surface roughly grind, fine grinding, with varigrained thick, fine sandpaper, grind step by step again, until be milled to 600# abrasive paper for metallograph, sample plane was seized is without scar and local dent, obtain surface-brightening in, Mayari sample;
(2) polish attack: by after step (1) polishing, Mayari sample with rayon balls, dip in, Mayari metallographic structure detects polish attack agent in specimen surface wiping 5 seconds repeatedly, then with clear water or absolute ethyl alcohol, rinse and remove the residual polish attack agent of specimen surface, by in after cleaning, Mayari sample, at room temperature with hair-dryer, dry up;
(3) observe and take pictures: by process the metallographic microstructure sample obtaining through above-mentioned steps, under optical metallographic microscope, observe, take pictures, evaluate.
embodiment 5
As described in Example 4, the Mayari metallurgical polishing etchant disposal route of carrying out metallographic detection, difference is:
By in after step (1) polishing, Mayari sample with rayon balls, dip in, Mayari metallurgical polishing etchant is in specimen surface wiping 8 seconds repeatedly.
embodiment 6
As described in Example 4, the Mayari metallurgical polishing etchant disposal route of carrying out metallographic detection, difference is:
By in after step (1) polishing, Mayari sample with rayon balls, dip in, Mayari metallurgical polishing etchant is in specimen surface wiping 10 seconds repeatedly.
Claims (6)
1. in, a Mayari metallurgical polishing etchant, it is characterized in that, by the raw material of following volume parts, formed:
22.5 ~ 27.5 parts of distilled water;
13.5 ~ 16.5 parts of hydrogen peroxide;
0.9 ~ 1.1 part, hydrofluorite;
1.8 ~ 2.2 parts, nitric acid.
2. according to claim 1, Mayari metallurgical polishing etchant, it is characterized in that, the mass percentage concentration of described hydrogen peroxide is 27-35%, mass percentage concentration >=40% of described hydrofluorite, and the mass percentage concentration of described nitric acid is 65-68%.
3. according to claim 2, Mayari metallurgical polishing etchant, it is characterized in that, the mass percentage concentration of described hydrogen peroxide is 30%, the mass percentage concentration of described hydrofluorite is 40%, the mass percentage concentration of described nitric acid is 68%.
4. according to claim 3, Mayari metallurgical polishing etchant, it is characterized in that, by the raw material of following volume parts, formed:
24.5 ~ 25.5 parts of distilled water;
14.5 ~ 15.5 parts of the hydrogen peroxide of mass percentage concentration 30%;
0.9 ~ 1 part, the hydrofluorite of mass percentage concentration 40%;
1.9 ~ 2.1 parts, the nitric acid of mass percentage concentration 68%.
5. according to claim 3, Mayari metallurgical polishing etchant, it is characterized in that, by the raw material of following volume parts, formed:
Distilled water 25.5ml;
The hydrogen peroxide 14.5ml of mass percentage concentration 30%;
The hydrofluorite 1ml of mass percentage concentration 40%;
The nitric acid 2ml of mass percentage concentration 68%.
Described in claim 1-5 any one in, a Mayari metallurgical polishing etchant disposal route of carrying out metallographic detection, comprise the steps:
(1) polishing: first by, Mayari sample polishing removes surperficial oxide skin, then to specimen surface roughly grind, fine grinding, until be milled to 600# abrasive paper for metallograph, sample plane was seized is without scar and local dent, obtain surface-brightening in, Mayari sample;
(2) polish attack: by after step (1) polishing, Mayari sample with rayon balls, dip in, Mayari metallurgical polishing etchant is in specimen surface wiping 5 ~ 10 seconds repeatedly, then with clear water or absolute ethyl alcohol, rinse and remove the residual polish attack agent of specimen surface, under room temperature, dry up;
(3) observe and take pictures: by process the metallographic microstructure sample obtaining through above-mentioned steps, under optical metallographic microscope, observe, take pictures, evaluate.
Priority Applications (1)
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| CN201410031472.3A CN103743615A (en) | 2014-01-23 | 2014-01-23 | Medium/low-alloy heat-resistant steel metallographic phase polishing etching reagent and treatment method thereof |
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| CN201410031472.3A CN103743615A (en) | 2014-01-23 | 2014-01-23 | Medium/low-alloy heat-resistant steel metallographic phase polishing etching reagent and treatment method thereof |
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Cited By (4)
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| CN104458374A (en) * | 2014-12-03 | 2015-03-25 | 湖南江滨机器（集团）有限责任公司 | Preparation method of aluminum-silicon alloy testing sample with low-magnification grain size |
| CN106756510A (en) * | 2017-01-03 | 2017-05-31 | 华东交通大学理工学院 | A kind of etchant for showing low-alloy wear-resistant steel original austenite crystal prevention and its application |
| CN108300998A (en) * | 2018-02-02 | 2018-07-20 | 西安热工研究院有限公司 | Show aggressive agent, the preparation method and application of P91 and P92 steel original austenite crystal preventions |
| CN113215572A (en) * | 2021-05-07 | 2021-08-06 | 中航上大高温合金材料股份有限公司 | Corrosive agent and corrosion method for precipitated phase of duplex stainless steel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458374A (en) * | 2014-12-03 | 2015-03-25 | 湖南江滨机器（集团）有限责任公司 | Preparation method of aluminum-silicon alloy testing sample with low-magnification grain size |
| CN106756510A (en) * | 2017-01-03 | 2017-05-31 | 华东交通大学理工学院 | A kind of etchant for showing low-alloy wear-resistant steel original austenite crystal prevention and its application |
| CN108300998A (en) * | 2018-02-02 | 2018-07-20 | 西安热工研究院有限公司 | Show aggressive agent, the preparation method and application of P91 and P92 steel original austenite crystal preventions |
| CN113215572A (en) * | 2021-05-07 | 2021-08-06 | 中航上大高温合金材料股份有限公司 | Corrosive agent and corrosion method for precipitated phase of duplex stainless steel |
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Application publication date: 20140423 |