CN114045496A - Corrosion processing method of high-niobium titanium-aluminum alloy - Google Patents
Corrosion processing method of high-niobium titanium-aluminum alloy Download PDFInfo
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B6/00—Cleaning by electrostatic means
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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
- C23F1/20—Acidic compositions for etching aluminium or alloys thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/003—Alloys based on aluminium containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
Abstract
The invention discloses a corrosion processing method of a high-niobium titanium-aluminum alloy, which particularly relates to the technical field of corrosion processing and comprises the following specific steps: step one, electrostatic dust removal; secondly, blowing sand; step three, removing oil; step four, corrosion processing; step five, detecting the corrosion degree; step six, pickling; and step seven, drying. The invention can obtain the high-niobium titanium-aluminum alloy casting with low surface roughness and metallic luster. The invention can be corroded and processed at a high speed (0.005mm/min-0.020mm/min), does not need any additive, has a wide and easily-reached processing temperature range (15-40 ℃), is assisted by the injection of a mechanical circulating pump nozzle and the double stirring of compressed air in the process, has the surface roughness of less than 3.0 mu m after processing, has metal luster and obvious crystal grains on the surface, and can meet the application in multiple fields.
Description
Technical Field
The invention relates to the technical field of corrosion processing, in particular to a corrosion processing method of a high-niobium titanium-aluminum alloy.
Background
The titanium-aluminum alloy has the excellent performances of small density, excellent high-temperature strength, good oxidation resistance, good creep resistance and the like, so the titanium-aluminum alloy becomes an advanced high-temperature structural material with huge application potential. However, the room temperature plasticity and fracture toughness of the common titanium-aluminum alloy are poor, and the high temperature creep resistance and high temperature oxidation resistance at the temperature of over 800 ℃ are poor, so that the application range of the titanium-aluminum alloy in the fields of aerospace, automobiles and the like is severely limited by the defects.
In order to improve the room temperature plasticity and the high temperature oxidation resistance of the titanium-aluminum alloy, the high-content and high-melting-point transition group element Nb is added, so that the melting point of the alloy can be effectively improved, the use temperature reaches more than 900 ℃, and the titanium-aluminum alloy has excellent oxidation resistance. But the mechanical processing property is worse than that of the common titanium alloy, which brings great difficulty to the practical application. The corrosion processing is an effective method for solving the difficulty of mechanical processing of titanium-aluminum alloy, and is a processing technology for dissolving the surface of a workpiece by means of chemical dissolution. The titanium alloy corrosion processing has wide application prospect in the aerospace field: (1) the thin-wall workpiece is processed, so that the weight is reduced, and the requirement of light weight is met; (2) and the alpha layer on the surface of the casting is removed, the surface roughness of the casting is reduced, and the application requirement is met.
The high-niobium titanium-aluminum alloy is a new metal material and consists of Ti, A1, Nb, C, W and Y, wherein the content of A1 is 45-46%, the content of Nb is 8-10%, the content of C is 0-0.2%, the content of W is O-0.2%, the content of Y is 0-0.1% (the above is atomic percent), and the balance is Ti, the structure of the alloy consists of two ordered phases of Y and alpha 2, a uniform fine-grain full-lamellar structure is obtained in a wrought alloy and a cast alloy, the grain size is 100-150 um, the inter-lamellar spacing is 0.3-0.4 um, and the high-niobium titanium-aluminum alloy has the advantages that: the service temperature of the high-niobium titanium-aluminum alloy can reach 840-900 ℃, the high-niobium titanium-aluminum alloy has higher service temperature than that of the currently used common silver-titanium alloy, and is generally accepted internationally, and the high-niobium titanium-aluminum alloy can replace high-performance deformation nickel-based high-temperature alloy, the density of the high-niobium titanium-aluminum alloy is about half of that of the high-performance deformation nickel-based high-temperature alloy, so that the part has the effect of remarkably reducing the weight.
The technology leads the aerospace engine materials in China to be at the leading level in the world, and the application of the high-niobium titanium-aluminum alloy material opens up new development in important fields of aerospace, ships, automobiles and the like, leads the existing equipment to be developed in a breakthrough manner, leads the design and the market of products to be completely changed, and has updating, breakthrough significance and great benefit.
The prior art has the following defects: the mechanical processing of the cast high-niobium titanium-aluminum alloy is difficult, the rate of processing the cast high-niobium titanium-aluminum alloy by the existing corrosion processing technology is extremely low (0.001 mm/min-0.003mm/min of single surface), the roughness is very large, the surface is dark and has no metallic luster, the application requirement cannot be met, the corrosion state, the corrosion speed and certain corrosion related parameters of the high-niobium titanium-aluminum alloy casting cannot be grasped and controlled in time, the corrosion condition of the high-niobium titanium-aluminum alloy casting is determined, and clear corrosion diagnosis information is given.
Disclosure of Invention
Therefore, the invention provides a corrosion processing method of a high-niobium titanium-aluminum alloy, which aims to solve the problems that the casting of the high-niobium titanium-aluminum alloy in the prior art is difficult to machine, the speed of the corrosion processing technology for casting the high-niobium titanium-aluminum alloy is extremely low (the single surface is 0.001mm/min-0.003mm/min), the roughness is very high, the surface is dark and has no metallic luster, and the application requirements cannot be met.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions: the corrosion processing method of the high-niobium titanium-aluminum alloy comprises the following specific steps of:
step one, electrostatic dust removal: forming an electric field for maintaining gas ionization on the two metal anodes and the cathode through high-voltage direct current;
step two, sand blowing: medium brown corundum, the grain size is 54-120 meshes, the sand blowing distance is 10-12cm, and the pressure is 0.4-0.6 MPa;
step three, oil removal: physically removing oil from the high-niobium titanium-aluminum alloy casting treated in the step two by using acetone, removing residual oil stains or marks on the surface, stirring by using ultrasonic waves, and then cleaning by using flowing water;
step four, corrosion processing: placing the high-niobium titanium-aluminum alloy casting processed in the step three in a corrosion processing solution, assisting mechanical and air stirring processing for 10-30min, and washing the high-niobium titanium-aluminum alloy casting subjected to corrosion processing by flowing water;
step five, corrosion degree detection: indirectly reflecting the corrosion rate of the metal according to the resistance change condition of the corroded metal probe;
step six, pickling: placing the high-niobium titanium-aluminum alloy casting processed in the fourth step into a pickling solution, stirring for 1-5min by using machinery and air, and washing the high-niobium titanium-aluminum alloy casting with at least two flowing water after pickling;
step seven, drying: oven drying at 80-120 deg.C or washing with hot water at 65-95 deg.C and drying.
Further, in the first step, the electrostatic dust removal process comprises the steps of maintaining an electric field which is enough to ionize gas by using two metal anodes and two cathodes with larger curvature radius difference, wherein the metal anodes are made of metal plates with different geometric shapes and are also called as dust collecting electrodes, the cathodes are made of metal wires with different cross-section shapes and are also called as discharging electrodes, and electrons, namely anions and cations, generated after gas ionization are adsorbed on the dust passing through the electric field to enable the dust to obtain electric charges, and the dust with different charge polarities respectively moves to the electrodes with different polarities and is deposited on the electrodes under the action of the electric field force, so that the purpose of separating the dust from the gas is achieved.
Further, in the third step, the oil removing liquid comprises the following components and parameters:
Daraclean282 5％-15％(v％)；
the deionized water (< 20 muS/cm) remains;
the temperature is 40-50 ℃.
Further, in the fourth step, the corrosion processing liquid comprises the following components and parameters:
30g/L-120g/L of hydrofluoric acid;
the mass ratio of nitric acid to hydrofluoric acid is 1.5-4;
the deionized water (< 20 muS/cm) remains;
the temperature is 20-40 ℃.
Furthermore, in the fifth step, a resistance probe provided with a test piece made of a high-niobium titanium-aluminum alloy material is inserted into the corrosion processing solution, the cross-sectional area of the test piece is reduced due to corrosion, so that the resistance of the test piece is increased, if the corrosion of the test piece is basically uniform, the change of the resistance is in direct proportion to the corrosion amount of the test piece, the increase of the resistance is periodically and accurately measured for many times, the actual measurement is the variation of the resistance ratio between the test piece and a reference test piece which is not corroded, the total corrosion amount after the period of time can be calculated, and therefore the corrosion processing rate of the high-niobium titanium-aluminum alloy casting is calculated.
Further, in the sixth step, the components and parameters of the pickling solution are as follows:
15g/L-30g/L of hydrofluoric acid;
the mass ratio of nitric acid to hydrofluoric acid is 10-25;
the deionized water (< 20 muS/cm) remains;
the temperature is 15-35 ℃.
Furthermore, the surface roughness Ra of the high-niobium titanium-aluminum alloy casting is less than or equal to 3.0 mu m, the high-niobium titanium-aluminum alloy casting has metallic luster, and the surface crystal grains are obvious.
Furthermore, the corrosion processing rate of the high-niobium titanium-aluminum alloy casting is monitored in real time through a resistance probe, so that the corrosion processing rate can reach 0.005mm/min-0.020mm/min of a single surface, and the tolerance reaches within 10%.
The embodiment of the invention has the following advantages:
1. the invention can be corroded and processed at a higher speed (0.005mm/min-0.020mm/min), does not need any additive, has a wider processing temperature range (15-40 ℃) and is easy to achieve, a mechanical circulating pump nozzle is used for spraying and compressed air double stirring in the process, the surface roughness after processing is less than 3.0 mu m, compared with the prior art, the surface has metal luster and obvious crystal grains, and the invention can meet the application in multiple fields;
2. according to the invention, electrostatic precipitation is carried out before a sand blowing process, so that the surface cleanliness of the high-niobium titanium-aluminum alloy casting is improved, the sand blowing process achieves a better effect, the depression corrosion degree of the high-niobium titanium-aluminum alloy casting is monitored in the corrosion processing process, so that the corrosion precision of the high-niobium titanium-aluminum alloy casting can be mastered more timely, compared with the prior art, the corrosion state, the corrosion speed and certain parameters related to corrosion of the high-niobium titanium-aluminum alloy casting are calculated, the corrosion condition of the high-niobium titanium-aluminum alloy casting is determined, and clear corrosion diagnosis information is given.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a surface topography of the cast high Nb TiAl alloy after the etching process of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a corrosion processing method of a high-niobium titanium-aluminum alloy, which comprises the following specific steps of:
step one, electrostatic dust removal: forming an electric field for maintaining gas ionization on the two metal anodes and the cathode through high-voltage direct current;
the electrostatic dust collection process includes maintaining an electric field for ionizing gas with high voltage DC to produce electrons, which are adsorbed onto dust passing through the electric field to obtain electric charge, and depositing the dust onto the electrode to separate dust from gas.
And secondly, carrying out sand blasting treatment on the cast high-niobium titanium-aluminum alloy (8.0Nb), wherein the sand blasting medium is brown corundum, the particle size is 80 meshes, the sand blasting distance is 10cm, and the pressure is 0.4 MPa.
Step three, oil removal: physically removing oil from the casting treated in the step two by using acetone, removing residual oil stains or marks on the surface, stirring by using ultrasonic waves, and then cleaning by using flowing water; the chemical oil removal comprises the following components: daraclean282 volume fraction is 10%, deionized water (less than 20 muS/cm), the casting is put into chemical degreasing liquid at 45 ℃ for treatment for 12min, after the casting is degreased, the casting is washed by two flowing water and sprayed, the whole casting surface is ensured to be hydrophilic, and after a continuous water film is more than 30S, the degreasing is qualified.
Step four, corrosion processing: placing the casting processed in the third step into a corrosion processing solution, stirring and processing for 15min by assisting with machinery and air, wherein the temperature is 30 +/-2 ℃, and washing the casting after corrosion processing by flowing water; the corrosion processing liquid comprises the following components: 90g/L of hydrofluoric acid, and the mass ratio of nitric acid to hydrofluoric acid is 4.
Step five, corrosion degree detection: indirectly reflecting the corrosion rate of the metal according to the resistance change condition of the corroded metal probe;
the resistance probe provided with a test piece made of a high-niobium titanium-aluminum alloy material is inserted into a corrosion processing solution, the cross section area of the test piece is reduced due to corrosion, so that the resistance is increased, if the corrosion of the test piece is basically uniform, the change of the resistance is in direct proportion to the corrosion amount of the test piece, the increase of the resistance is periodically and accurately measured for many times, the actual measurement is the variation of the resistance ratio of the test piece to a reference test piece time which is not corroded, the total corrosion amount after the period of time can be calculated, and the corrosion processing rate of a high-niobium titanium-aluminum alloy casting is calculated.
Step six, pickling: placing the casting processed in the fourth step in pickling solution, stirring and processing for 2min by assisting machinery and air, wherein the temperature is 20 ℃, and washing the casting with at least two flowing water after pickling; the pickle liquor comprises the following components: 20g/L of hydrofluoric acid and 18 mass ratios of nitric acid to hydrofluoric acid.
Step seven, drying: washing with hot water at 80 deg.C, and blowing with compressed air.
The surface roughness Ra of the high-niobium titanium-aluminum alloy casting is less than or equal to 3.0 mu m, the high-niobium titanium-aluminum alloy casting has metallic luster, and the surface crystal grains are obvious.
The corrosion processing rate of the high-niobium titanium-aluminum alloy casting is monitored in real time through a resistance probe, so that the corrosion processing rate can reach 0.005mm/min-0.020mm/min of a single surface, and the tolerance reaches within 10%.
Example 2:
the invention provides a corrosion processing method of a high-niobium titanium-aluminum alloy, which comprises the following specific steps of:
step one, electrostatic dust removal: the process of trapping charged dust comprises the following steps: forming an electric field for maintaining gas ionization on the two metal anodes and the cathode through high-voltage direct current;
the electrostatic dust collection process includes maintaining an electric field for ionizing gas with high voltage DC to produce electrons, which are adsorbed onto dust passing through the electric field to obtain electric charge, and depositing the dust onto the electrode to separate dust from gas.
And secondly, carrying out sand blasting treatment on the cast high-niobium titanium-aluminum alloy (7.5Nb), wherein the sand blasting medium is brown corundum, the particle size is 120 meshes, the sand blasting distance is 10cm, and the pressure is 0.6 MPa.
Step three, oil removal: physically removing oil from the casting treated in the step two by using acetone, removing residual oil stains or marks on the surface, stirring by using ultrasonic waves, and then cleaning by using flowing water; the chemical oil removal comprises the following components: daraclean282 with volume fraction of 12 percent and deionized water (less than 20 mu S/cm), treating the casting in chemical degreasing liquid at 45 ℃ for 12min, after degreasing the casting, washing the casting with two flowing water and spraying, ensuring that the whole casting surface is hydrophilic, and judging that degreasing is qualified if a continuous water film is more than 30S.
Step four, corrosion processing: placing the casting processed in the third step into a corrosion processing solution, stirring and processing for 15min by assisting with machinery and air, wherein the temperature is 40 +/-2 ℃, and washing the casting after corrosion processing by flowing water; the corrosion processing liquid comprises the following components: 120g/L of hydrofluoric acid, and the mass ratio of nitric acid to hydrofluoric acid is 3.
Step five, corrosion degree detection: indirectly reflecting the corrosion rate of the metal according to the resistance change condition of the corroded metal probe;
the resistance probe provided with a test piece made of a high-niobium titanium-aluminum alloy material is inserted into a corrosion processing solution, the cross section area of the test piece is reduced due to corrosion, so that the resistance is increased, if the corrosion of the test piece is basically uniform, the change of the resistance is in direct proportion to the corrosion amount of the test piece, the increase of the resistance is periodically and accurately measured for many times, the actual measurement is the variation of the resistance ratio of the test piece to a reference test piece time which is not corroded, the total corrosion amount after the period of time can be calculated, and the corrosion processing rate of a high-niobium titanium-aluminum alloy casting is calculated.
Step six, pickling: placing the casting processed in the fourth step in pickling solution, stirring and processing for 2min by assisting machinery and air, wherein the temperature is 20 ℃, and washing the casting with at least two flowing water after pickling; the pickle liquor comprises the following components: 22g/L of hydrofluoric acid, and the mass ratio of nitric acid to hydrofluoric acid is 15.
Step seven, drying: washing with hot water at 80 deg.C, and blowing with compressed air.
The surface roughness Ra of the high-niobium titanium-aluminum alloy casting is less than or equal to 3.0 mu m, the high-niobium titanium-aluminum alloy casting has metallic luster, and the surface crystal grains are obvious.
The corrosion processing rate of the high-niobium titanium-aluminum alloy casting is monitored in real time through a resistance probe, so that the corrosion processing rate can reach 0.005mm/min-0.020mm/min of a single surface, and the tolerance reaches within 10%.
The surfaces of the two above-mentioned embodiments after corrosion processing are shown in FIG. 2, the left side a-i is the surface appearance of the cast high Nb TiAl alloy (8.0Nb), and the embodiment 1 is the c diagram; the right side a-i is the surface morphology of the cast high niobium TiAl alloy (7.0Nb) after processing, and example 2 is d. The surface roughness of the product is measured by a MarSurf PS 10 surface roughness measuring instrument of German Mark company, the roughness is below 3.0 mu m, the surface roughness is good, the product has metallic luster, and the product meets the process requirements. The weight P1 of the test piece was weighed and recorded by an electronic balance, then the test piece and the material of the hanging test piece were polypropylene thread, the corrosion processing time was measured by a stopwatch, the test piece was taken out, washed with water, dried, and then the weight P2 of the test piece was weighed and recorded, and the dissolution rate (mm/min) was calculated according to the following formula. The test piece had a size of about 100mm X50 mm X (1-5) mm. Scale division value: 0.001 g. R ═ 1000(P1-P2)/(S × d))/t0, where: the dissolution rate of the R test piece is mm/min, the weight of the P1 test piece before corrosion is g +/-0.001 g, the weight of the P2 test piece after corrosion is g +/-0.001 g, the total area of the S test piece is mm2, the density of the d material is g/cm3, and the corrosion time is t0 min. The corrosion processing rate of the two embodiments is higher than that of a single surface by 0.005mm/min, and the corrosion processing requirements are met.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. The corrosion processing method of the high-niobium titanium-aluminum alloy is characterized by comprising the following steps of: the method comprises the following specific steps:
step one, electrostatic dust removal: forming an electric field for maintaining gas ionization on the two metal anodes and the cathode through high-voltage direct current;
step two, sand blowing: medium brown corundum, the grain size is 54-120 meshes, the sand blowing distance is 10-12cm, and the pressure is 0.4-0.6 MPa;
step three, oil removal: physically removing oil from the high-niobium titanium-aluminum alloy casting treated in the step two by using acetone, removing residual oil stains or marks on the surface, stirring by using ultrasonic waves, and then cleaning by using flowing water;
step four, corrosion processing: placing the high-niobium titanium-aluminum alloy casting processed in the step three in a corrosion processing solution, assisting mechanical and air stirring processing for 10-30min, and washing the high-niobium titanium-aluminum alloy casting subjected to corrosion processing by flowing water;
step five, corrosion degree detection: indirectly reflecting the corrosion rate of the metal according to the resistance change condition of the corroded metal probe;
step six, pickling: placing the high-niobium titanium-aluminum alloy casting processed in the fourth step into a pickling solution, stirring for 1-5min by using machinery and air, and washing the high-niobium titanium-aluminum alloy casting with at least two flowing water after pickling;
step seven, drying: oven drying at 80-120 deg.C or washing with hot water at 65-95 deg.C and drying.
2. The corrosion processing method of a high niobium titanium aluminum alloy as claimed in claim 1, wherein: in the first step, the electrostatic dust collection process includes maintaining an electric field sufficient for gas ionization by means of high voltage DC on two metal anodes and cathodes with relatively great curvature radius difference, the metal anodes are made of metal plates in different geometric shapes and are also called dust collecting electrodes, the cathodes are made of metal wires in different cross section shapes and are also called discharge electrodes, and the electrons generated after gas ionization, i.e. anions and cations, are adsorbed on the dust passing through the electric field to make the dust obtain electric charges, and the dust with different electric charge polarities moves to the electrodes with different polarities respectively under the action of the electric field force and is deposited on the electrodes, so that the purpose of separating the dust from the gas is achieved.
3. The corrosion processing method of a high niobium titanium aluminum alloy as claimed in claim 1, wherein: in the third step, the oil removing liquid comprises the following components and parameters:
Daraclean282 5％-15％(v％)；
the deionized water (< 20 muS/cm) remains;
the temperature is 40-50 ℃.
4. The corrosion processing method of a high niobium titanium aluminum alloy as claimed in claim 1, wherein: in the fourth step, the components and parameters of the corrosion working fluid are as follows:
30g/L-120g/L of hydrofluoric acid;
the mass ratio of nitric acid to hydrofluoric acid is 1.5-4;
the deionized water (< 20 muS/cm) remains;
the temperature is 20-40 ℃.
5. The corrosion processing method of a high niobium titanium aluminum alloy as claimed in claim 1, wherein: in the fifth step, a resistance probe provided with a test piece made of a high-niobium titanium-aluminum alloy material is inserted into the corrosion processing solution, the cross-sectional area of the test piece is reduced due to corrosion, so that the resistance of the test piece is increased, if the corrosion of the test piece is basically uniform, the change of the resistance is in direct proportion to the corrosion amount of the test piece, the increase of the resistance is periodically and accurately measured for many times, the actually measured change amount of the resistance ratio of the test piece to a reference test piece which is not corroded in time can be calculated, and therefore the corrosion processing rate of the high-niobium titanium-aluminum alloy casting can be calculated.
6. The corrosion processing method of a high niobium titanium aluminum alloy as claimed in claim 1, wherein: in the sixth step, the pickling solution comprises the following components and parameters:
15g/L-30g/L of hydrofluoric acid;
the mass ratio of nitric acid to hydrofluoric acid is 10-25;
the deionized water (< 20 muS/cm) remains;
the temperature is 15-35 ℃.
7. The corrosion processing method of a high niobium titanium aluminum alloy as claimed in claim 1, wherein: the surface roughness Ra of the high-niobium titanium-aluminum alloy casting is less than or equal to 3.0 mu m, the high-niobium titanium-aluminum alloy casting has metallic luster, and the surface crystal grains are obvious.
8. The method of claim 5, wherein the method comprises: the corrosion processing rate of the high-niobium titanium-aluminum alloy casting is monitored in real time through a resistance probe, so that the corrosion processing rate can reach 0.005mm/min-0.020mm/min of a single surface, and the tolerance reaches within 10%.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06128759A (en) * | 1992-10-13 | 1994-05-10 | Nippon Steel Corp | Corrosive liquid revealing metallic structure of aluminum alloy and revealing method |
| KR20030079740A (en) * | 2002-04-02 | 2003-10-10 | 동우 화인켐 주식회사 | Etchant composition for aluminum (or aluminum alloy) single layer and multi layers |
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| CN104073801A (en) * | 2014-06-19 | 2014-10-01 | 中国科学院金属研究所 | Chemical milling solution for pure titanium, titanium alloys and titanium aluminum intermetallic compounds and chemical milling method |
| CN104746077A (en) * | 2015-03-12 | 2015-07-01 | 南昌航空大学 | Precise chemical milling method for Ti2AlNb alloy |
| CN105039983A (en) * | 2015-06-30 | 2015-11-11 | 珠海保税区摩天宇航空发动机维修有限公司 | Aeroengine titanium alloy hub surface oxidation and residual silver removal technology |
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2021
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| JPH06128759A (en) * | 1992-10-13 | 1994-05-10 | Nippon Steel Corp | Corrosive liquid revealing metallic structure of aluminum alloy and revealing method |
| KR20030079740A (en) * | 2002-04-02 | 2003-10-10 | 동우 화인켐 주식회사 | Etchant composition for aluminum (or aluminum alloy) single layer and multi layers |
| CN101122025A (en) * | 2007-08-09 | 2008-02-13 | 成都飞机工业（集团）有限责任公司 | Titanium alloying milling solution and milling technique used for the same |
| CN104073801A (en) * | 2014-06-19 | 2014-10-01 | 中国科学院金属研究所 | Chemical milling solution for pure titanium, titanium alloys and titanium aluminum intermetallic compounds and chemical milling method |
| CN104746077A (en) * | 2015-03-12 | 2015-07-01 | 南昌航空大学 | Precise chemical milling method for Ti2AlNb alloy |
| CN105039983A (en) * | 2015-06-30 | 2015-11-11 | 珠海保税区摩天宇航空发动机维修有限公司 | Aeroengine titanium alloy hub surface oxidation and residual silver removal technology |
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