CN101956196A - Simple titanium alloy corrosion machining tank liquor control method - Google Patents
Simple titanium alloy corrosion machining tank liquor control method Download PDFInfo
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- CN101956196A CN101956196A CN 201010522392 CN201010522392A CN101956196A CN 101956196 A CN101956196 A CN 101956196A CN 201010522392 CN201010522392 CN 201010522392 CN 201010522392 A CN201010522392 A CN 201010522392A CN 101956196 A CN101956196 A CN 101956196A
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Abstract
The invention discloses a simple titanium alloy corrosion machining tank liquor control method, which comprises the following steps: (1) preparing components of initial corrosion machining solution; and (2) corroding a titanium alloy with the initial corrosion machining solution, periodically analyzing the titanium ion content of the solution, and supplying solution components for each 10g/L increase in the titanium ion content, wherein the solution components include hydrofluoric acid in an amount which is 1/2 of the initial amount, hydrogen nitrate in an amount which is 1/6 of the initial amount and additive in an amount which is 1/2 of the initial amount. The method has the advantages of ensuring stable corrosion machining production, improving machining speed, relieving surface roughness, meeting requirements of corrosion machining production and prolong the service life of the corrosion machining solution on the premise of no influence on production efficiency and surface quality, wherein in the whole machining process, the corrosion machining speed is 0.008 to 0.016 mm/min on a single side, the surface roughness is less than or equal to 0.8mu m, and the chemical milling depth different is +/-0.08mm.
Description
Technical field
The present invention relates to a kind of corrosion processing tank liquor control method, relate in particular to a kind of easy titanium alloy corrosion processing tank liquor control method.
Background technology
Corrosion processing is a kind of special method for metal working, claims chemical etching again, is to want working position to be exposed in the chemical mediator (solution) in metallic substance to corrode, thereby obtains the required shape and size of part.The method of corrosion processing and general mechanical workout has basic difference, in the process of processing, without any mechanical forced Li Jiazhu on the surface of being cut.In addition, under effective protection of protective layer material, corrosion processing can accurately cut material get off from specifying on the area, and stays the material thickness of stipulating on the drawing at the position of needs.Corrosion processing technology is simple, realizes that than being easier to surfaceness is low, and production cost is low, and production efficiency is higher.Corrosion processing is mainly used at present: 1. processing approaches and large-area part; 2. can not be difficult to traditional machining process material processed; 3. process the profile complicated parts; 4. alleviate structural weight; 5. process the tapered cross-section.
The titanium alloy corrosion processing grew up in nineteen sixties.Titanium alloy corrosion processing technology becomes a kind of general working method that alleviates structural weight at present, it also can be used for making those with traditional processing method can not be finished or manufacturing expense is very high profile sharp processing, the thin-walled processing warping phenomenon that it can avoid the ordinary process method to cause does not easily have rigidity requirement to processing yet.
The solution life-span is 1 liter of maximum titanium amount of corrosion processing solution institute energy dissolved, and it is the important parameter of titanium alloy corrosion processing technology.The composition of titanium alloy corrosion processing liquid generally contains HF, HNO
3And additive.Corrosion processing solution is processed after certain part, HF, HNO in the solution
3Reduce with the concentration of additive.The reduction of HF concentration causes the decline of corrosion processing speed; HNO
3The decline of content can influence surfaceness and amount of hydrogen infiltration; The deficiency of additive then can influence corrosion processing surface quality and process velocity; The existence of titanium ion can influence the quality of corrosion processing speed and specimen surface in the solution, along with corrosion processing is constantly carried out, titanium ion content in the corrosion processing solution increases, process velocity can significantly reduce, the first reduction afterwards of surfaceness raises, the glutinousness of solution strengthens, and the corrosion processing depth difference increases.When titanium ion content reaches certain value in the solution, also can't solve the too high quality problems that cause of titanium ion by adjusting, this moment, solution need be scrapped reprovision.So the content of main component and solution composition adjusted in the periodic analysis solution in whole corrosion processing process, thereby the content of main component is safeguarded normal corrosion processing and is guaranteed that the part processing quality is very important in the control corrosion processing liquid.But the analytical results with each main component in the solution is adjusted tank liquor, since interfering with each other between the composition, the accuracy of influence test, and complicated operation, therefore must seek a kind of titanium alloy corrosion processing tank liquor control method simple to operation, guarantee normally carrying out of corrosion processing production.
Summary of the invention
The object of the present invention is to provide a kind of easy titanium alloy corrosion processing tank liquor control method, this method improves the tank liquor life-span when guaranteeing process velocity and surface quality by regularly adjusting corrosion processing solution.
The present invention is achieved like this, and it is characterized in that method steps is:
(1) the initial corrosion process solutions is formed: hydrofluoric acid 45-55 grams per liter, nitric acid 185-230 grams per liter, additive Tween-20 0.2-0.3 grams per liter;
(2) adopt initial corrosion process solutions corrosion processing titanium alloy, use diantipyrylmethane spectrophotometry test titanium ion in the course of processing, as the every increase of titanium ion content 10g/L, add composition: hydrofluoric acid be original bulk 1/2, nitric acid be original bulk 1/6, additive is 1/2 of original bulk.
Described initial corrosion process solutions is optimum to be formed: hydrofluoric acid 55 grams per liters, nitric acid 230 grams per liters, Tween-20 0.25 grams per liter.
Described meltage with titanium ion in the corrosion processing solution serves as according to solution is adjusted.
The maximum meltage of described titanium ion is 70g/L.
Diantipyrylmethane spectrophotometry test titanium ion: the titanium standardized solution 1.0,2.0,3.0,4.0,5.0mL that accurately pipette 1000 μ g/mL are in 5 100mL volumetric flasks, be diluted to scale and shake up with deionized water, make the series of standards solution of titaniferous 0mg/L, 10mg/L, 20mg/L, 30mg/L, 40mg/L, 50mg/L.Get 6 50mL volumetric flasks, add 10mg/L, 20mg/L, 30mg/L, 40mg/L, 50mg/L standardized solution 10mL respectively, add 1+2 hydrochloric acid 15mL, 5% diantipyrylmethane solution 15mL again, constant volume obtains 2mg/L, 4mg/L, 6mg/L, 8mg/L, 10mg/L standardized solution respectively.Under the 420nm wavelength, use the 1cm cuvette, make the absorbancy that reference is surveyed chromophoric solution with the water blank solution, be ordinate zou with the absorbancy, titanium ion concentration is an X-coordinate, the drawing curve.Get 1mL corrosion processing liquid in the 1000mL volumetric flask, be diluted to scale with deionized water, shake up, get this diluent 10mL in the 50mL volumetric flask, add 15mL(1+2) hydrochloric acid and 15mL diantipyrylmethane solution, add water to scale and shake up, make reference, under wavelength 420nm, measure absorbancy with the water blank solution.Look into the concentration that working curve obtains titanium ion in the tank liquor.
Advantage of the present invention is: (1) is that benchmark comes solution is adjusted with the meltage of titanium ion in the corrosion processing solution mainly, and test is accurate, and method is simple, and control can be stablized corrosion processing production easily; (2) hydrofluoric acid, nitric acid, additive in the tank liquor can be controlled in certain concentration range after the adjustment, thereby raising process velocity, improve surface finish and surfaceness, satisfy the requirement that corrosion processing is produced, corrosion processing speed per minute 0.008-0.016mm/ single face in the whole course of processing, surfaceness≤0.8 m, milling depth difference ± 0.08mm; (3) utilize this inflation method under the prerequisite that does not influence production efficiency and surface quality, can prolong the life-span of corrosion processing solution.
Embodiment
When initial corrosion processing solution is:
Hydrofluoric acid 55 grams per liters
Nitric acid 230 grams per liters
Tween-20 0.25 grams per liter
Part material is the TC1 titanium alloy, and specimen size is 100mm * 70mm * 1.98mm, and the corrosion processing zone is 80mm * 50mm, as-annealed condition.See embodiment 1,2,3.
Embodiment 1
When titanium ion content is 0g/L in the solution, the average corrosion processing speed of TC1 titanium alloy is 15.9 μ m/min/ single faces, processing rear surface roughness Ra is 0.48 μ m, and depth offset be ± 0.01mm, corrosion processing surperficial no etched groove, channeling, cave in, overhang, defective such as island.
When titanium ion content was 10g/L in the solution, process velocity dropped to 13.0 μ m/min/ single faces, and surface roughness Ra is 0.50 μ m, and depth offset is 0.028mm.By method provided by the invention solution is adjusted.Adjust post-treatment speed and rise to 15.0 μ m/min, surfaceness is 0.48 μ m, and depth difference drops to 0.016mm from adjusting preceding 0.028mm.
Embodiment 2
When titanium ion content was 30g/L in the solution, process velocity dropped to 10.6 μ m/min/ single faces, and surface roughness Ra is 0.55 μ m, and depth offset is 0.040mm.By method provided by the invention solution is adjusted.Adjust post-treatment speed and rise to 13.0 μ m/min, surfaceness is 0.52 μ m, and depth difference drops to 0.029mm from adjusting preceding 0.040mm.
Embodiment 3
When titanium ion content was 50g/L in the solution, process velocity dropped to 9.5 μ m/min/ single faces, and surface roughness Ra is 0.56 μ m, and depth offset is 0.052mm.By method provided by the invention solution is adjusted.Adjust post-treatment speed and rise to 11.6 μ m/min, surfaceness is 0.53 μ m, and depth difference drops to 0.033mm from adjusting preceding 0.052mm.
?
When initial corrosion processing solution is:
Hydrofluoric acid 45 grams per liters
Nitric acid 185 grams per liters
Tween-20 0.2 grams per liter
Part material is the TC1 titanium alloy, and specimen size is 100mm * 70mm * 1.98mm, and the corrosion processing zone is 80mm * 50mm, as-annealed condition.See embodiment 4,5,6.
Embodiment 4
When titanium ion content is 0g/L in the solution, the average corrosion processing speed of TC1 titanium alloy is 13.9 μ m/min/ single faces, processing rear surface roughness Ra is 0.48 μ m, and depth offset be ± 0.01mm, corrosion processing surperficial no etched groove, channeling, cave in, overhang, defective such as island.
When titanium ion content was 10g/L in the solution, process velocity dropped to 10.6 μ m/min/ single faces, and surface roughness Ra is 0.50 μ m, and depth offset is 0.021mm.By method provided by the invention solution is adjusted.Adjust post-treatment speed and rise to 13.1 μ m/min, surfaceness is 0.48 μ m, and depth difference drops to 0.012mm from adjusting preceding 0.021mm.
Embodiment 5
When titanium ion content was 30g/L in the solution, process velocity dropped to 9.5 μ m/min/ single faces, and surface roughness Ra is 0.53 μ m, and depth offset is 0.032mm.By method provided by the invention solution is adjusted.Adjust post-treatment speed and rise to 11.5 μ m/min, surfaceness is 0.50 μ m, and depth difference drops to 0.025mm from adjusting preceding 0.032mm.
Embodiment 6
When titanium ion content was 50g/L in the solution, process velocity dropped to 8.6 μ m/min/ single faces, and surface roughness Ra is 0.55 μ m, and depth offset is 0.045mm.By method provided by the invention solution is adjusted.Adjust post-treatment speed and rise to 10.8 μ m/min, surfaceness is 0.52 μ m, and depth difference drops to 0.027mm from adjusting preceding 0.045mm.
When beginning corrosion processing solution is:
Hydrofluoric acid 50 grams per liters
Nitric acid 210 grams per liters
Tween-20 0.3 grams per liter
Part material is the TC1 titanium alloy, and specimen size is 100mm * 70mm * 1.98mm, and the corrosion processing zone is 80mm * 50mm, as-annealed condition.See embodiment 7,8,9.
Embodiment 7
When titanium ion content is 0g/L in the solution, the average corrosion processing speed of TC1 titanium alloy is 14.5 μ m/min/ single faces, processing rear surface roughness Ra is 0.48 μ m, and depth offset be ± 0.01mm, corrosion processing surperficial no etched groove, channeling, cave in, overhang, defective such as island.
When titanium ion content was 10g/L in the solution, process velocity dropped to 11.5 μ m/min/ single faces, and surface roughness Ra is 0.50 μ m, and depth offset is 0.026mm.By method provided by the invention solution is adjusted.Adjust post-treatment speed and rise to 14.0 μ m/min, surfaceness is 0.48 μ m, and depth difference drops to 0.015mm from adjusting preceding 0.026mm.
Embodiment 8
When titanium ion content was 30g/L in the solution, process velocity dropped to 9.2 μ m/min/ single faces, and surface roughness Ra is 0.53 μ m, and depth offset is 0.035mm.By method provided by the invention solution is adjusted.Adjust post-treatment speed and rise to 12.1 μ m/min, surfaceness is 0.50 μ m, and depth difference drops to 0.028mm from adjusting preceding 0.035mm.
Embodiment 9
When titanium ion content was 50g/L in the solution, process velocity dropped to 8.3 μ m/min/ single faces, and surface roughness Ra is 0.55 μ m, and depth offset is 0.048mm.By method provided by the invention solution is adjusted.Adjust post-treatment speed and rise to 11.0 μ m/min, surfaceness is 0.53 μ m, and depth difference drops to 0.030mm from adjusting preceding 0.048mm.
Claims (4)
1. easy titanium alloy corrosion processing tank liquor control method is characterized in that method steps is:
(1) the initial corrosion process solutions is formed: hydrofluoric acid 45-55 grams per liter, nitric acid 185-230 grams per liter, additive Tween-20 0.2-0.3 grams per liter;
(2) adopt initial corrosion process solutions corrosion processing titanium alloy, use diantipyrylmethane spectrophotometry test titanium ion in the course of processing, as the every increase of titanium ion content 10g/L, add composition: hydrofluoric acid be original bulk 1/2, nitric acid be original bulk 1/6, additive is 1/2 of original bulk.
2. a kind of easy titanium alloy corrosion processing tank liquor control method according to claim 1 is characterized in that it is characterized in that: the meltage with titanium ion in the corrosion processing solution serves as according to solution is adjusted.
3. a kind of easy titanium alloy corrosion processing tank liquor control method according to claim 1, the maximum meltage that it is characterized in that described titanium ion is 70g/L.
4. a kind of easy titanium alloy corrosion processing tank liquor control method according to claim 1 is characterized in that the optimum composition of described initial corrosion process solutions: hydrofluoric acid 55 grams per liters, nitric acid 230 grams per liters, Tween-20 0.25 grams per liter.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112918A (en) * | 2015-06-29 | 2015-12-02 | 南昌航空大学 | Method for recycling titanium alloy chemical milling solution |
| RU2640337C1 (en) * | 2016-08-15 | 2017-12-27 | федеральное государственное бюджетное образовательное учреждение высшего образования "Алтайский государственный университет" | Method of concentrating microelements |
| CN108375647A (en) * | 2018-03-02 | 2018-08-07 | 沈阳飞机工业（集团）有限公司 | A kind of titanium alloy etching tank liquid chemical analysis method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101709471A (en) * | 2009-12-16 | 2010-05-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Chemical milling method for titanium alloy blades |
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2010
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709471A (en) * | 2009-12-16 | 2010-05-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Chemical milling method for titanium alloy blades |
Non-Patent Citations (2)
| Title |
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| 《材料工程》 20100820 林翠等 TA15 钛合金腐蚀加工工艺研究 51-55 1-4 , 第8期 2 * |
| 《表面技术》 20051031 姚淑霞等 二安替比林甲烷分光光度法测定电镀废水中钛的含量 89-90 1-4 第34卷, 第5期 2 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112918A (en) * | 2015-06-29 | 2015-12-02 | 南昌航空大学 | Method for recycling titanium alloy chemical milling solution |
| RU2640337C1 (en) * | 2016-08-15 | 2017-12-27 | федеральное государственное бюджетное образовательное учреждение высшего образования "Алтайский государственный университет" | Method of concentrating microelements |
| CN108375647A (en) * | 2018-03-02 | 2018-08-07 | 沈阳飞机工业（集团）有限公司 | A kind of titanium alloy etching tank liquid chemical analysis method |
| CN108375647B (en) * | 2018-03-02 | 2020-11-06 | 沈阳飞机工业（集团）有限公司 | Chemical analysis method for titanium alloy corrosion tank liquor |
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Application publication date: 20110126 |