CN1046000C - Metallographic etching reagent - Google Patents
Metallographic etching reagent Download PDFInfo
- Publication number
- CN1046000C CN1046000C CN97103866A CN97103866A CN1046000C CN 1046000 C CN1046000 C CN 1046000C CN 97103866 A CN97103866 A CN 97103866A CN 97103866 A CN97103866 A CN 97103866A CN 1046000 C CN1046000 C CN 1046000C
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- present
- acid
- metallographic
- sodium carbonate
- anhydrous sodium
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- ing And Chemical Polishing (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The present invention relates to a metallographic etching reagent which is especially suitable for the metallographical corrosion of high-copper titanium alloy (the weight ratio of the content of copper is larger than 10%). The metallographic etching reagent of the present invention comprises water, hydrofluoric acid and hydrochloric acid. The present invention is characterized in that the present invention also comprises anhydrous sodium carbonate and edible acid caseine which have the compounding ratios: 5 to 10 ml of the water, 0.1 to 0.4 ml of the hydrofluoric acid, 0.1 to 0.4 ml of the hydrochloric acid, 0.1 to 0.3g of the anhydrous sodium carbonate, and 1 to 3g of the edible acid caseine. The grain boundary of metallographic structures is clear by using the present invention, an alpha phase and a Ti2Cu granule of an alloy basal body are easily distinguished.
Description
The present invention relates to a kind of metallographic etching agent, be specially adapted to the etching pit of high copper-titanium alloy (Cu content weight ratio is greater than 10%).
In the production process of titanium alloy, in order to obtain the alloy that metallographic structure and performance adapt, all need to carry out the observation of metallographic structure in each stage of titanium alloy production, in order to the composition of adjusting alloy at any time, processing temperature, machining deformation amount and heat treating regime etc.Usually the metallographic etching agent of titanium alloy is made up of compositions such as water, nitric acid, hydrofluoric acid, hydrochloric acid.With above-mentioned metallographic etching agent corrosion titanium alloy, particularly, make the high-copper titanium alloy surface form a film to after the corrosion of high-copper titanium alloy surface, can't clear view debate the not true metallographic structure of high copper-titanium alloy like this.
The purpose of this invention is to provide and a kind ofly can overcome above-mentioned shortcoming, make the metallographic structure crystal boundary clear, offer an explanation alloy substrate α easily mutually and Ti
2The Cu particle, the metallographic etching agent of being convenient to observe.
A kind of metallographic etching agent, comprise water, fluoric acid root and mineral acid etc., it is characterized in that its composition also comprises anhydrous sodium carbonate and chromium sesquioxide, their proportioning is: water: 5-15ml hydrofluoric acid (the concentration weight percent is 40%): 0.1-0.4ml hydrochloric acid (the concentration weight percent is 36%): 0.1-0.4ml anhydrous sodium carbonate: 0.1-0.3g chromium sesquioxide: 1-3g
The metallographic etching agent of the present invention's preparation is specially adapted to the etch of high copper-titanium alloy phase, and its metallographic structure crystal boundary is clear, is convenient to observe alloy phase structure, offers an explanation alloy substrate α phase and Ti easily
2The Cu particle.
Embodiment 1:
Earlier 5ml water is placed container, add 0.4ml hydrofluoric acid (the concentration weight percent is 40%) and 0.4ml hydrochloric acid (the concentration weight percent is 36%) then, add 0.3g unit's aqueous sodium carbonate and 3g chromium sesquioxide at last, mix.
Embodiment 2:
Earlier 10ml water is put in the dried container, added 0.2ml hydrofluoric acid (the concentration weight percent is 40%) and 0.2ml hydrochloric acid (the concentration weight percent is 36%) then, add 0.2g anhydrous sodium carbonate and 2g chromium sesquioxide at last, mix.
Embodiment 3:
Earlier 15ml water is placed container, add 0.1ml hydrofluoric acid (the concentration weight percent is 40%) and 0.1ml hydrochloric acid (the concentration weight percent is 36%) then, add 0.1g anhydrous sodium carbonate and 1g chromium sesquioxide at last, mix.
The high copper-titanium alloy sample of polishing is immersed in the metallographic etching agent for preparing,, take out alloy sample through behind the several minutes, water is rinsed well, clean the alloy sample surface gently with the cotton balls of being stained with alcohol again, airing promptly obtains the metallographic structure of the alloy sample that will observe.
The high copper-titanium alloy sample of polishing is immersed in the metallographic etching agent for preparing,, take out alloy sample through behind the several minutes, water is rinsed well, clean the alloy sample surface gently with the cotton balls of being stained with alcohol again, airing promptly obtains the metallographic structure of the alloy sample that will observe.
Claims (1)
- A kind of metallographic etching agent, comprise water, fluoric acid root and mineral acid etc., it is characterized in that its composition also comprises anhydrous sodium carbonate and chromium sesquioxide, their proportioning is: water: 5-15ml hydrofluoric acid (the concentration weight percent is 40%): 0.1-0.4ml hydrochloric acid (the concentration weight percent is 36%): 0.1-0.4ml anhydrous sodium carbonate: 0.1-0.3g chromium sesquioxide: 1-3g
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97103866A CN1046000C (en) | 1997-04-02 | 1997-04-02 | Metallographic etching reagent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97103866A CN1046000C (en) | 1997-04-02 | 1997-04-02 | Metallographic etching reagent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1167839A CN1167839A (en) | 1997-12-17 |
| CN1046000C true CN1046000C (en) | 1999-10-27 |
Family
ID=5166940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97103866A Expired - Fee Related CN1046000C (en) | 1997-04-02 | 1997-04-02 | Metallographic etching reagent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1046000C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144762B (en) * | 2006-09-13 | 2010-05-12 | 鞍钢股份有限公司 | Corrosive agent for displaying silicon steel solidification structure and preparation method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866047A (en) * | 2012-09-28 | 2013-01-09 | 昆明理工大学 | Method for preparing metallographic display sample made of Ti-Al laminated composite material |
| CN102866048A (en) * | 2012-09-28 | 2013-01-09 | 昆明理工大学 | Preparation method of metallographic display sample of Ti-Cu laminar composite |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU597950A1 (en) * | 1976-01-16 | 1978-03-15 | Северодонецкий Филиал Всесоюзного Научно-Исследовательского И Конструкторского Института Химического Машиностроения | Rotor for testing metals for intercrystalline corrosion |
-
1997
- 1997-04-02 CN CN97103866A patent/CN1046000C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU597950A1 (en) * | 1976-01-16 | 1978-03-15 | Северодонецкий Филиал Всесоюзного Научно-Исследовательского И Конструкторского Института Химического Машиностроения | Rotor for testing metals for intercrystalline corrosion |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144762B (en) * | 2006-09-13 | 2010-05-12 | 鞍钢股份有限公司 | Corrosive agent for displaying silicon steel solidification structure and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1167839A (en) | 1997-12-17 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |