CN111041488A - Ultrahigh-strength and toughness titanium alloy macrostructure corrosive agent and corrosion method thereof - Google Patents
Ultrahigh-strength and toughness titanium alloy macrostructure corrosive agent and corrosion method thereof Download PDFInfo
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- CN111041488A CN111041488A CN201911317502.6A CN201911317502A CN111041488A CN 111041488 A CN111041488 A CN 111041488A CN 201911317502 A CN201911317502 A CN 201911317502A CN 111041488 A CN111041488 A CN 111041488A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/26—Acidic compositions for etching refractory metals
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- 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
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Abstract
The invention belongs to the field of preparation of a metallographic structure of a titanium alloy, and particularly relates to a corrosive agent for a macrostructure of an ultrahigh-strength and high-toughness titanium alloy and a corrosion method thereof. The corrosive agent comprises: hydrofluoric acid and nitric acid, wherein the hydrofluoric acid content is 1 to 3 parts by volume fraction, and the nitric acid content is 7 to 9 parts by volume fraction. The method comprises the following steps: corroding the ground and polished or car polished long-rod type ultrahigh strength and toughness titanium alloy low-power surface for preset time by using the corrosive agent at room temperature; washing the low-power noodles with a large amount of clear water; washing the low-power surface with absolute ethyl alcohol or acetone again; and drying the macroscopic surface by using an air cooler. The preparation of the macrostructure of the long-rod type ultrahigh-strength and toughness titanium alloy is realized by the corrosive and the corrosion method, and clear, clean and bright macrostructure is obtained.
Description
Technical Field
The invention belongs to the field of preparation of a metallographic structure of a titanium alloy, and particularly relates to a corrosive agent for a macrostructure of an ultrahigh-strength and high-toughness titanium alloy and a corrosion method thereof.
Background
The metastable β titanium alloy is prepared by adding a large amount of β stable elements into the alloy components, and the tensile strength can reach 1350MPa after solid solution and aging heat treatment, when β stable elements in the titanium alloy are higher, the traditional Kroll corrosive agent and corrosion method are adopted to carry out macroscopic structure corrosion, the macroscopic surface generates 'black spots', and the evaluation of the macroscopic structure of the forging piece is influenced.
Disclosure of Invention
The purpose of the invention is as follows: the corrosive agent and the corrosion method for the macrostructure of the ultrahigh-strength and toughness titanium alloy are provided, so that macrostructure corrosion can be conveniently and effectively carried out on the long-rod ultrahigh-strength and toughness titanium alloy, and the macrostructure of the alloy is clear, clean and bright.
The technical scheme of the invention is as follows:
in a first aspect, an ultrahigh strength and toughness titanium alloy macrostructure corrosive agent is provided, which comprises: hydrofluoric acid and nitric acid, wherein the hydrofluoric acid content is 1 to 3 parts by volume fraction, and the nitric acid content is 7 to 9 parts by volume fraction.
Further, hydrofluoric acid and nitric acid are both analytical reagents.
In a second aspect, a method for etching a macrostructure of an ultra-high strength and toughness titanium alloy, the method being performed using the etchant described in claim 1 or 2, the method comprising:
corroding the ground and polished or car polished long-rod type ultrahigh strength and toughness titanium alloy low-power surface for preset time by using the corrosive agent at room temperature;
washing the low-power noodles with a large amount of clear water;
washing the low-power surface with absolute ethyl alcohol or acetone again;
and drying the macroscopic surface by using an air cooler.
Further, before washing the low-power noodles with a large amount of clean water, the method further comprises the following steps: and removing the residual corrosive agent on the macroscopic surface.
Further, the removing of the residual corrosive agent of the low power surface specifically comprises: and (3) wiping the low-power surfaces with clean cotton immediately, wiping the residual corrosive agent completely, and drying the corrosive agent by using an air cooler.
Further, the predetermined time is 15 seconds to 30 seconds.
Further, the low-power noodles are cleaned by a large amount of clear water, and the method specifically comprises the following steps: the water flow direction forms a predetermined angle with the macroscopic surface.
Further, the predetermined included angle is 30 ° to 45 °.
The invention has the beneficial effects that:
the corrosive agent realizes the preparation of the macrostructure of the long-rod type ultrahigh-strength and high-toughness titanium alloy, and obtains clear, clean and bright macrostructure. Simple operation and excellent corrosion effect.
Detailed Description
The invention provides a corrosive agent for a macrostructure of an ultrahigh-strength and high-toughness titanium alloy, which comprises the following components: hydrofluoric acid and nitric acid, wherein the hydrofluoric acid content is 1 to 3 parts by volume fraction, and the nitric acid content is 7 to 9 parts by volume fraction.
Further, hydrofluoric acid and nitric acid are both analytical reagents.
The invention also provides a corrosion method for the macrostructure of the ultrahigh-strength and high-toughness titanium alloy, which is carried out by using the corrosive agent and comprises the following steps: corroding the ground and polished or car polished long-rod type ultrahigh strength and toughness titanium alloy low-power surface for preset time by using the corrosive agent at room temperature; washing the low-power noodles with a large amount of clear water; washing the low-power surface with absolute ethyl alcohol or acetone again; and drying the macroscopic surface by using an air cooler.
Further, before washing the low-power noodles with a large amount of clean water, the method further comprises the following steps: and removing the residual corrosive agent on the macroscopic surface.
Further, the removing of the residual corrosive agent of the low power surface specifically comprises: and (3) wiping the low-power surfaces with clean cotton immediately, wiping the residual corrosive agent completely, and drying the corrosive agent by using an air cooler.
Further, the predetermined time is 15 seconds to 30 seconds.
Further, the low-power noodles are cleaned by a large amount of clear water, and the method specifically comprises the following steps: the water flow direction forms a predetermined angle with the macroscopic surface.
Further, the predetermined included angle is 30 ° to 45 °.
The present invention will be further described in detail with reference to the following examples, but the embodiments of the present invention are not limited thereto, and mainly include the following steps:
example 1: preparing the macrostructure corrosive agent by adopting analytically pure hydrofluoric acid and nitric acid according to the ratio of 1: 4. And (3) corroding the ground and polished ultrahigh-strength and high-toughness titanium alloy forging piece at low power for 30 seconds by using cotton dipped with the corrosive agent at room temperature, wiping the low-power surface by using clean cotton, and drying the residual corrosive agent by using an air cooler. Then, a large amount of clear water is used for cleaning from the top of the low power, and an included angle of about 45 degrees is formed between the low power and the water flow direction of the clear water during cleaning. Then the whole is cleaned by absolute ethyl alcohol, and finally the air is dried by an air cooler. The macroscopic tissue surface is clear. Bright and no obvious black spot.
Example 2: preparing the macrostructure corrosive agent by adopting analytically pure hydrofluoric acid and nitric acid according to the ratio of 3: 7. And (3) corroding the ground and polished ultrahigh-strength and high-toughness titanium alloy forging piece at low power for 25 seconds by using cotton dipped with the corrosive at room temperature, wiping the low-power surface by using clean cotton, and drying the residual corrosive by using an air cooler. Then, a large amount of clean water is used for cleaning from the top of the low power, and an included angle of about 30 degrees is formed between the low power and the water flow direction of the clean water during cleaning. Then the whole is cleaned by acetone, and finally the air is dried by an air cooler.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (8)
1. An ultrahigh-strength and toughness titanium alloy macrostructure corrosive agent is characterized by comprising: hydrofluoric acid and nitric acid, wherein the hydrofluoric acid content is 1 to 3 parts by volume fraction, and the nitric acid content is 7 to 9 parts by volume fraction.
2. The etching agent of claim 1, wherein the hydrofluoric acid and the nitric acid are both analytical reagents.
3. A method for corroding macrostructures of an ultra-high-toughness titanium alloy, which is performed by using the corrosive agent of claim 1 or 2, and which comprises:
corroding the ground and polished or car polished long-rod type ultrahigh strength and toughness titanium alloy low-power surface for preset time by using the corrosive agent at room temperature;
washing the low-power noodles with a large amount of clear water;
washing the low-power surface with absolute ethyl alcohol or acetone again;
and drying the macroscopic surface by using an air cooler.
4. The method of claim 3, wherein prior to washing the low-gravity surface with the volume of fresh water, further comprising: and removing the residual corrosive agent on the macroscopic surface.
5. The method of claim 3, wherein removing the low power surface residual etchant comprises: and (3) wiping the low-power surfaces with clean cotton immediately, wiping the residual corrosive agent completely, and drying the corrosive agent by using an air cooler.
6. The method of claim 3, wherein the predetermined time is 15 seconds to 30 seconds.
7. The method of claim 3, wherein the cleaning of the low-magnification noodles with a large amount of fresh water comprises: the water flow direction forms a predetermined angle with the macroscopic surface.
8. The method of claim 7, wherein the predetermined included angle is 30 ° to 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911317502.6A CN111041488A (en) | 2019-12-19 | 2019-12-19 | Ultrahigh-strength and toughness titanium alloy macrostructure corrosive agent and corrosion method thereof |
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| CN201911317502.6A CN111041488A (en) | 2019-12-19 | 2019-12-19 | Ultrahigh-strength and toughness titanium alloy macrostructure corrosive agent and corrosion method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103484863A (en) * | 2012-06-07 | 2014-01-01 | 宁波江丰电子材料有限公司 | Metallographic corrosive, corrosion method for metallographic sample and display method for metallographic structure |
| CN106680059A (en) * | 2016-12-27 | 2017-05-17 | 北京有色金属研究总院 | Method for inspecting macrostructures and defects of beta titanium alloy |
| CN106702383A (en) * | 2016-07-05 | 2017-05-24 | 中国航空工业集团公司北京航空材料研究院 | Metallographic-phase corrosion liquid of beta titanium alloy and corrosion method |
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- 2019-12-19 CN CN201911317502.6A patent/CN111041488A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103484863A (en) * | 2012-06-07 | 2014-01-01 | 宁波江丰电子材料有限公司 | Metallographic corrosive, corrosion method for metallographic sample and display method for metallographic structure |
| CN106702383A (en) * | 2016-07-05 | 2017-05-24 | 中国航空工业集团公司北京航空材料研究院 | Metallographic-phase corrosion liquid of beta titanium alloy and corrosion method |
| CN106680059A (en) * | 2016-12-27 | 2017-05-17 | 北京有色金属研究总院 | Method for inspecting macrostructures and defects of beta titanium alloy |
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Application publication date: 20200421 |