CN103160843A - Process for removing welding stopping agent in TC4 titanium alloy superplastic forming - Google Patents
Process for removing welding stopping agent in TC4 titanium alloy superplastic forming Download PDFInfo
- Publication number
- CN103160843A CN103160843A CN2013100743457A CN201310074345A CN103160843A CN 103160843 A CN103160843 A CN 103160843A CN 2013100743457 A CN2013100743457 A CN 2013100743457A CN 201310074345 A CN201310074345 A CN 201310074345A CN 103160843 A CN103160843 A CN 103160843A
- Authority
- CN
- China
- Prior art keywords
- titanium alloy
- superplastic forming
- alloy superplastic
- stopping agent
- solder flux
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a process for removing a welding stopping agent in TC4 titanium alloy superplastic forming, which comprises the following steps: 1) immersing a TC4 titanium alloy superplastic forming member in alkali wash water at the temperature of 140-170 DEG C for washing for 1-4 hours, wherein the alkali wash water contains 500-700g/L of sodium hydroxide and 150-250g/L of sodium nitrite; 2) removing from the alkali wash water, washing the alkali wash water by clear water, then placing the TC4 titanium alloy superplastic forming member in a pickling solution, cleaning for 1-4 minutes at the room temperature, removing and then cleaning by water and then drying, wherein the pickling solution contains nitric acid concentration greater than 10g/L and less than or equal to 90g/L, and 300-450g/L of nitric acid concentration. The process for removing the welding stopping agent in TC4 titanium alloy superplastic forming can effectively remove the welding stopping agent, has no damage on a TC4 titanium alloy matrix, dust air pollution is not generated, compared with sand blasting and mechanical polishing, a lot of time can be saved, and the member surface effect is good.
Description
Technical field
The present invention relates to a kind of TC4 titanium alloy and end solder flux removal method at superplastic forming.
Background technology
TC4 titanium alloy material superplastic forming/diffusion transom adopts the gas pressurization diffusion to connect, member and cavity surface close contact, and frictional force is larger, for making distortion evenly, adopt lubricant, makes with lubricator to help the member demoulding; Also applied simultaneously diffusion pressure in non-diffusion joining region, for preventing that these non-spreading areas are diffused in connection, also should coat the only solder flux of isolation and lubrication, only solder flux is combined with matrix firmly, be difficult for removing, use mechanical grinding, cut basically easily occurs, easily hurt with the blast way and do not have the only matrix position of solder flux, and these two kinds of methods relatively waste time and energy.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provide a kind of TC4 titanium alloy superplastic forming that does not damage TC4 titanium alloy superplastic formation spare matrix to end solder flux and remove processing method.
For achieving the above object, the technical solution used in the present invention is:
TC4 titanium alloy superplastic forming is ended solder flux and is removed processing method, and method is as follows:
1) TC4 titanium alloy superplastic formation spare is immersed in alkaline wash, 140 ~ 170 ℃ of temperature, clean 1 ~ 4 h, alkaline wash is sodium hydroxide and Sodium Nitrite mixed aqueous solution, wherein contains sodium hydroxide 500 ~ 700 g/L, Sodium Nitrite 150 ~ 250 g/L;
2) take out from alkaline wash after, wash alkaline wash with clear water, then TC4 titanium alloy superplastic formation spare is put into pickle solution, at room temperature clean 1 ~ 4min, after taking out, water cleans, dries up, pickle solution is the mixed aqueous solution of hydrofluoric acid and nitric acid, 10 g/L＜hydrofluoric acid concentration≤90 g/L wherein, concentration of nitric acid 300 ~ 450 g/L.
Beneficial effect of the present invention: with the only solder flux in chemical process removal TC4 titanium alloy superplastic forming, the parameters such as the concentration by controlling alkaline wash and pickle solution, temperature, time, can effectively remove only solder flux, do not damage the TC4 titanium alloy substrate, do not have the dust atmospheric pollution, trough washery liquid is safeguarded simple, and can simultaneously a lot of TC4 titanium alloy superplastic forming parts be put into trough washery liquid and stop the solder flux removal, saved a large amount of time than blast and mechanical grinding, piece surface is effective.
Description of drawings
Fig. 1 is that TC4 titanium alloy superplastic forming spare stops solder flux removal front and back microscopic appearance figure.
Embodiment
Embodiment 1 TC4 titanium alloy superplastic forming is ended solder flux and is removed processing method and removal effect
TC4 titanium alloy superplastic forming is ended solder flux and is removed processing method, and method is as follows:
1) TC4 titanium alloy superplastic formation spare is immersed in alkaline wash, 140 ~ 170 ℃ of temperature, clean 1.5 h, alkaline wash is sodium hydroxide and Sodium Nitrite mixed aqueous solution, wherein contains sodium hydroxide 500 g/L, Sodium Nitrite 150 g/L;
2) take out from alkaline wash after, wash alkaline wash with clear water, then TC4 titanium alloy superplastic formation spare is put into pickle solution, at room temperature clean 1.5 min, after taking out, water cleans, dries up, pickle solution is the mixed aqueous solution of hydrofluoric acid and nitric acid, hydrofluoric acid concentration 90 g/L wherein, concentration of nitric acid 300 g/L.
Removal effect: original TC4 titanium alloy superplastic forming spare stops solder flux and is white in color in the knee, high-visible, and becoming yellow through stopping solder flux after alkali cleaning, after pickling, the surface of titanium alloy presents metallic color, say the removal fully of titanium alloy surface yellow substance, reached and removed the only purpose of solder flux of white.
Embodiment 2 TC4 titanium alloy superplastic formings are ended solder flux and are removed processing method and removal effect
TC4 titanium alloy superplastic forming is ended solder flux and is removed processing method, and method is as follows:
1) TC4 titanium alloy superplastic formation spare is immersed in alkaline wash, 140 ~ 170 ℃ of temperature, clean 3.5 h, alkaline wash is sodium hydroxide and Sodium Nitrite mixed aqueous solution, wherein contains sodium hydroxide 700 g/L, Sodium Nitrite 250 g/L;
2) take out from alkaline wash after, wash alkaline wash with clear water, then TC4 titanium alloy superplastic formation spare is put into pickle solution, at room temperature clean 4min, after taking out, water cleans, dries up, pickle solution is the mixed aqueous solution of hydrofluoric acid and nitric acid, hydrofluoric acid concentration 10 g/L wherein, concentration of nitric acid 450 g/L.
Removal effect: in order to further illustrate the only removal effect of solder flux, to virgin alloy and remove the alloy of solder flux only the cross section memory metallographicobservation, as can be seen from Figure 1, there is the nonconducting black band of one deck at original TC4 titanium alloy surface, thickness is about 8 μ m, distribute more even, this layer is exactly take BN as main only solder flux; After adopting only solder flux removal technique of the present invention, titanium alloy surface presents metallic color, can find out from microscopic appearance figure, and the only solder flux of TC4 titanium alloy surface is removed.This shows that the only solder flux of TC4 titanium alloy surface has reached the purpose of effective removal after through alkali cleaning and acid cleaning process.
Claims (1)
1.TC4 the titanium alloy superplastic forming is ended solder flux and is removed processing method, it is characterized in that method is as follows:
1) TC4 titanium alloy superplastic formation spare is immersed in alkaline wash, 140 ~ 170 ℃ of temperature, clean 1 ~ 4 h, alkaline wash is sodium hydroxide and Sodium Nitrite mixed aqueous solution, wherein contains sodium hydroxide 500 ~ 700 g/L, Sodium Nitrite 150 ~ 250 g/L;
2) take out from alkaline wash after, wash alkaline wash with clear water, then TC4 titanium alloy superplastic formation spare is put into pickle solution, at room temperature clean 1 ~ 4min, after taking out, water cleans, dries up, pickle solution is the mixed aqueous solution of hydrofluoric acid and nitric acid, 10 g/L＜hydrofluoric acid concentration≤90 g/L wherein, concentration of nitric acid 300 ~ 450 g/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100743457A CN103160843A (en) | 2013-03-08 | 2013-03-08 | Process for removing welding stopping agent in TC4 titanium alloy superplastic forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100743457A CN103160843A (en) | 2013-03-08 | 2013-03-08 | Process for removing welding stopping agent in TC4 titanium alloy superplastic forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103160843A true CN103160843A (en) | 2013-06-19 |
Family
ID=48584368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100743457A Pending CN103160843A (en) | 2013-03-08 | 2013-03-08 | Process for removing welding stopping agent in TC4 titanium alloy superplastic forming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103160843A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433648A (en) * | 2013-09-09 | 2013-12-11 | 哈尔滨工业大学 | Easily coated TiO2 solid welding-stop flux for titanium alloy SPF/DB (Super Plastic Forming/Diffusion Bonding) and preparation method thereof |
| CN104694947A (en) * | 2015-04-01 | 2015-06-10 | 航天精工股份有限公司 | Cadmium coating passive film removing method |
| CN104894580A (en) * | 2015-06-25 | 2015-09-09 | 贵州航天精工制造有限公司 | Novel cleaning fluid and cleaning method for titanium alloy scale cinder |
| CN105256317A (en) * | 2015-10-27 | 2016-01-20 | 苏州市海岸钛业股份有限公司 | Titanium chip alkaline etching and smoothing process |
| CN107740124A (en) * | 2017-09-29 | 2018-02-27 | 中国航发航空科技股份有限公司 | The removal technique of casing unit titanium alloy α layers in a kind of aerial engine fan |
| CN109576709A (en) * | 2019-01-29 | 2019-04-05 | 中国科学院金属研究所 | The chemical minimizing technology of Ta coating is sputtered on a kind of alloy steel matrix |
| CN110344061A (en) * | 2019-08-22 | 2019-10-18 | 北京星航机电装备有限公司 | A kind of thin-wall titanium alloy skin-surface oxide layer chemistry minimizing technology |
-
2013
- 2013-03-08 CN CN2013100743457A patent/CN103160843A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 乔永莲等: "TC4钛合金表面止焊剂去除工艺研究", 《测控技术》 * |
| 林兆荣: "《金属超塑性成形原理及应用》", 30 November 1990, 航空工业出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433648A (en) * | 2013-09-09 | 2013-12-11 | 哈尔滨工业大学 | Easily coated TiO2 solid welding-stop flux for titanium alloy SPF/DB (Super Plastic Forming/Diffusion Bonding) and preparation method thereof |
| CN104694947A (en) * | 2015-04-01 | 2015-06-10 | 航天精工股份有限公司 | Cadmium coating passive film removing method |
| CN104894580A (en) * | 2015-06-25 | 2015-09-09 | 贵州航天精工制造有限公司 | Novel cleaning fluid and cleaning method for titanium alloy scale cinder |
| CN105256317A (en) * | 2015-10-27 | 2016-01-20 | 苏州市海岸钛业股份有限公司 | Titanium chip alkaline etching and smoothing process |
| CN107740124A (en) * | 2017-09-29 | 2018-02-27 | 中国航发航空科技股份有限公司 | The removal technique of casing unit titanium alloy α layers in a kind of aerial engine fan |
| CN107740124B (en) * | 2017-09-29 | 2019-03-01 | 中国航发航空科技股份有限公司 | The removal technique of α layers of casing unit titanium alloy in a kind of aerial engine fan |
| CN109576709A (en) * | 2019-01-29 | 2019-04-05 | 中国科学院金属研究所 | The chemical minimizing technology of Ta coating is sputtered on a kind of alloy steel matrix |
| CN110344061A (en) * | 2019-08-22 | 2019-10-18 | 北京星航机电装备有限公司 | A kind of thin-wall titanium alloy skin-surface oxide layer chemistry minimizing technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103160843A (en) | Process for removing welding stopping agent in TC4 titanium alloy superplastic forming | |
| TWI496948B (en) | Method for conversion treating surface of magnesium alloy workpiece | |
| CN105256342B (en) | A kind of super hydrophobic surface based on copper and preparation method thereof | |
| CN105366961A (en) | Manufacturing method of anti-glare glass | |
| CN102580951A (en) | Cleaning process of hydraulic parts | |
| CN104233327A (en) | Surface cleaning process for metal product | |
| CN101294287A (en) | Formula and technique for neutral rust remover for rust cleaning of sheet material | |
| CN105112928A (en) | Metal surface cleaning method | |
| CN102125914A (en) | Ultrasonic surface cleaning process for forged workpiece | |
| CN108624946B (en) | Electrolytic paint stripping agent and paint stripping method | |
| CN102825427A (en) | Manufacturing method for diffusion welding of aircraft rudder assembly | |
| CN103966616B (en) | A kind of chemical deburring technique for spring surface | |
| CN104325229A (en) | Welding process capable of reducing welding seam rusts | |
| CN103114293A (en) | Technology process for removing scale cinder in thermal forming of TC4 titanium alloy | |
| CN104357862A (en) | Metal surface cleaning method | |
| CN110066996B (en) | Magnesium alloy micro-etching agent and nano surface treatment process before injection molding | |
| CN110093608B (en) | Surface polishing solution for additive manufacturing of aluminum alloy and application | |
| CN104498870A (en) | Aluminum plating pretreatment process of multi-arc ion plating of threaded stainless steel part and application | |
| CN111118517A (en) | Clamp paint removing system and method | |
| CN104646354A (en) | Method for removing oil dirt on metal surface | |
| CN104498968A (en) | Efficient rust remover | |
| CN104984948A (en) | Reworking method of primer-coated part | |
| EP1972390A3 (en) | An aqueous washing system and method | |
| CN108004556B (en) | Method for deashing surface of coating of silicon-aluminum composite material | |
| US11312048B2 (en) | Surface treatment method of material, material product and composite material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130619 |