CN101972900A - Soldering flux for copper brazing - Google Patents
Soldering flux for copper brazing Download PDFInfo
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- CN101972900A CN101972900A CN 201010519770 CN201010519770A CN101972900A CN 101972900 A CN101972900 A CN 101972900A CN 201010519770 CN201010519770 CN 201010519770 CN 201010519770 A CN201010519770 A CN 201010519770A CN 101972900 A CN101972900 A CN 101972900A
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- brazing
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- flux
- brazing flux
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Abstract
The invention belongs to the technical field of brazing, and in particular relates to a soldering flux for copper brazing. The soldering flux consists of the following raw materials in part by mass: 16 to 18 parts of copper brazing powder, 13 to 15 parts of boric acid and 71 to 79 parts of potassium fluoborate. The soldering flux has high stripping capacity, is convenient to use, and has higher high-temperature activity at brazing temperature and high brazing seam quality. Internal practices prove that: the soldering flux can be successfully applied to flame brazing for copper short-circuit end rings for YFKS1120-418,000kW and 20,000kW motors.
Description
Technical field
The invention belongs to the soldering tech field, particularly a kind of copper brazing brazing flux.
Background technology
The rotor of large-scale high-voltage asynchronous motor often adopts copper bar rotor, and for solder brazing connects, those skilled in the art often utilize copper phosphorus brazing filler metal or silver-base solder to cooperate the FB102 brazing flux to carry out gas brazing between its copper sliver and the copper end ring.But because copper end ring workpiece size is generally all bigger, how more than 90 ~ 100mm, during soldering, relatively just need longer the heat time heating time that reaches brazing temperature, yet the fusing point of FB102 brazing flux and lowest activity temperature are lower than the too many of copper phosphorus brazing filler metal or silver-base solder, before reaching brazing temperature, just consumed part FB102 brazing flux, cause the FB102 brazing flux under brazing temperature, to show relatively poor high temperature active, so that the striping effect in soldering later stage and solder flowability differ from and the brazed seam quality can not be guaranteed, even workpiece is scrapped.For satisfying the soldering between large-size asynchronous motor rotor copper sliver and the copper end ring, it is imperative to develop a kind of brazing flux that has high temperature active preferably under brazing temperature.
Summary of the invention
The object of the present invention is to provide a kind of copper brazing brazing flux of high temperature active preferably that under brazing temperature, has.
For achieving the above object, the present invention has taked following technical scheme: a kind of copper brazing brazing flux, form by each raw material of following mass fraction: 16 ~ 18 parts in brazing powder, 13 ~ 15 parts of boric acid, 71 ~ 79 parts of potassium fluoborates.
Preferably, the mass fraction of each raw material is: 17 parts in brazing powder, 14 parts of boric acid, 75 parts of potassium fluoborates.
Further, described brazing powder preferably copper welding powder CJ301.
The function of each raw material among the present invention: brazing powder CJ301: be gas welding flux, have very high active temperature because of its fusing point is high, its deoxidation thing is very capable simultaneously; Boric acid (H
3BO
4): can reduce the fusing point of brazing flux, reduce the surface tension of brazing flux, promote sprawling of brazing flux; Potassium fluoborate (KBF
4): the striping ability of brazing flux can be improved, and the fusing point and the surface tension of brazing flux can be reduced.More than physics and chemical property Synergistic under the proportioning that the present invention determines of three kinds of raw materials, the brazing flux of making has high temperature active preferably under brazing temperature.
Preparation method: get each raw material by mass fraction, mix and promptly make brazing flux of the present invention.
Using method: cooperate copper phosphorus brazing filler metal or silver-base solder to use by this area routine techniques.
Brazing flux striping ability of the present invention is strong, easy to use, has high temperature active preferably under brazing temperature, and the brazed seam quality is good, and inside facts have proved, can be successfully applied to the gas brazing of the copper short circuit end ring of YFKS1120-4 18000kW and 20000kW motor.
Description of drawings
The soldering photo that obtains when adopting brazing flux of the present invention among Fig. 1: the embodiment 1;
Adopt the soldering photo that obtains when having the FB102 brazing flux now among Fig. 2: the embodiment 1.
The specific embodiment
Below in conjunction with specific embodiment technical scheme of the present invention is done further introduction in detail, but protection scope of the present invention is not limited thereto.
Embodiment 1
A kind of copper brazing brazing flux is made up of following each raw material: brazing powder CJ301 17g, boric acid 14g, potassium fluoborate 75g.
By above-mentioned quality, get each raw material, mix and promptly make brazing flux of the present invention.
By this area routine operation, the brazing flux and the existing FB102 brazing flux (JB/T 6045-1992) of present embodiment are cooperated solder BCu89PAg(copper phosphorus brazing filler metal respectively, contain 5% silver medal, GB/T 6418-2008,645 ~ 815 ℃ of fusion temperatures) at the copper short circuit end ring (material T2 copper) of 830 ℃ ~ 860 ℃ following gas brazing YFKS1120-4 18000kW motors of brazing temperature.Fig. 1 and Fig. 2 are respectively the soldering photos that obtains when adopting present embodiment brazing flux and FB102 brazing flux; The active temperature contrast is as shown in table 1; Interpretation of result: the fusion temperature of the activation temperature of FB102 brazing flux and solder BCu89PAg differs far away, FB102 brazing flux condensing temperature just begins to melt striping in the time of 600 ℃, before reaching brazing temperature, just consumed most FB102 brazing flux, so that have relatively poor high temperature active under brazing temperature, brazed seam is of poor quality; And the activation temperature of brazing flux of the present invention is relatively near the fusion temperature of solder BCu89PAg, when brazing flux condensing temperature of the present invention during at 720 ℃, brazing flux begins to melt striping, reduced the consumption that reaches the preceding brazing flux of brazing temperature, show have high temperature active preferably under brazing temperature, the brazed seam quality is good.
Embodiment 2
A kind of copper brazing brazing flux is made up of following each raw material: brazing powder CJ301 16g, boric acid 13g, potassium fluoborate 71g.
By above-mentioned quality, get each raw material, mix and promptly make brazing flux of the present invention.
By this area routine operation, the brazing flux and the existing FB102 brazing flux (JB/T 6045-1992) of present embodiment are cooperated solder BAg45CuZn(silver-base solder respectively, GB10046-88,665 ~ 745 ℃ of fusion temperatures) at the copper short circuit end ring (material T2 copper) of 760 ℃ ~ 790 ℃ following gas brazing YFKS1120-4 20000kW motors of brazing temperature.The soldering photo result who obtains when adopting the present embodiment brazing flux with the FB102 brazing flux is consistent with embodiment 1; The active temperature contrast is as shown in table 2; Interpretation of result: the fusion temperature of the activation temperature of FB102 brazing flux and solder BAg45CuZn differs far away, FB102 brazing flux condensing temperature just begins to melt striping in the time of 600 ℃, before reaching brazing temperature, just consumed most FB102 brazing flux, so that have relatively poor high temperature active under brazing temperature, brazed seam is of poor quality; The activation temperature of brazing flux of the present invention is relatively near the fusion temperature of solder BAg45CuZn, when brazing flux condensing temperature of the present invention during at 710 ℃, brazing flux begins to melt striping, has reduced the consumption that reaches brazing flux before the brazing temperature, show have high temperature active preferably under brazing temperature, the brazed seam quality is good.
Embodiment 3
A kind of copper brazing brazing flux is made up of following each raw material: brazing powder CJ301 18g, boric acid 15g, potassium fluoborate 79g.
By above-mentioned quality, get each raw material, mix and promptly make brazing flux of the present invention.
By this area routine operation, the brazing flux and the existing FB102 brazing flux (JB/T 6045-1992) of present embodiment are cooperated solder BCu88PAg(copper phosphorus brazing filler metal respectively, contain 5% silver medal, GB/T 6418-2008,643 ~ 771 ℃ of fusion temperatures) at the copper short circuit end ring (material T2 copper) of 786 ~ 816 ℃ of following gas brazing YFKS1120-4 20000kW motors of brazing temperature.The soldering photo result who obtains when adopting the present embodiment brazing flux with the FB102 brazing flux is consistent with embodiment 1; The active temperature contrast is as shown in table 3; Interpretation of result: the fusion temperature of the activation temperature of FB102 brazing flux and solder BCu88PAg differs far away, FB102 brazing flux condensing temperature just begins to melt striping in the time of 600 ℃, before reaching brazing temperature, just consumed most FB102 brazing flux, so that have relatively poor high temperature active under brazing temperature, brazed seam is of poor quality; The activation temperature of brazing flux of the present invention is relatively near the fusion temperature of solder BCu88PAg, when brazing flux condensing temperature of the present invention during at 730 ℃, brazing flux just begins to melt striping, reduced the consumption that reaches the preceding brazing flux of brazing temperature, show have high temperature active preferably under brazing temperature, the brazed seam quality is good.
Claims (3)
1. a copper brazing brazing flux is characterized in that being made up of each raw material of following mass fraction: 16 ~ 18 parts in brazing powder, 13 ~ 15 parts of boric acid, 71 ~ 79 parts of potassium fluoborates.
2. copper brazing brazing flux as claimed in claim 1 is characterized in that the mass fraction of each raw material is: 17 parts in brazing powder, 14 parts of boric acid, 75 parts of potassium fluoborates.
3. copper brazing brazing flux as claimed in claim 1 or 2 is characterized in that: described brazing powder is brazing powder CJ301.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010519770 CN101972900A (en) | 2010-10-26 | 2010-10-26 | Soldering flux for copper brazing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010519770 CN101972900A (en) | 2010-10-26 | 2010-10-26 | Soldering flux for copper brazing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101972900A true CN101972900A (en) | 2011-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010519770 Pending CN101972900A (en) | 2010-10-26 | 2010-10-26 | Soldering flux for copper brazing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692112A (en) * | 2013-12-05 | 2014-04-02 | 四川达宇特种车辆制造厂 | Silver brazing flux suitable for carbon steel, stainless steel, copper and copper alloy |
| CN105171274A (en) * | 2015-09-15 | 2015-12-23 | 铜陵新鑫焊材有限公司 | Formula for brazing flux of copper welding rod |
| CN105965178A (en) * | 2016-06-15 | 2016-09-28 | 上海和伍复合材料有限公司 | High-activity brazing agent and preparation method thereof |
| CN106041355A (en) * | 2016-07-20 | 2016-10-26 | 安徽华众焊业有限公司 | Copper-based soldering paste |
| CN112453764A (en) * | 2020-12-12 | 2021-03-09 | 江西洪都航空工业集团有限责任公司 | Preparation method of flame brazing copper brazing material |
| CN114083171A (en) * | 2021-12-06 | 2022-02-25 | 韩雷 | Self-welding integrated copper-phosphorus soldering lug and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2357014A (en) * | 1941-07-07 | 1944-08-29 | William L Ulmer | Flux composition |
| CN1105616A (en) * | 1994-01-17 | 1995-07-26 | 江立新 | Sliver soldering paste |
| CN1176162A (en) * | 1996-09-11 | 1998-03-18 | 上海龙星结构工程公司 | Gaseous brazing agent |
| CN1273155A (en) * | 1999-05-08 | 2000-11-15 | 德古萨－于尔斯股份公司 | Flux and hard lead welding difficult wetted metal material |
| CN1307945A (en) * | 2000-12-28 | 2001-08-15 | 南京宝色钛业有限公司 | Silver soldering method for red copper crucible |
| CN1586795A (en) * | 2004-08-31 | 2005-03-02 | 广州有色金属研究院 | Copper welding paste for automatic brazing and its preparing method |
-
2010
- 2010-10-26 CN CN 201010519770 patent/CN101972900A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2357014A (en) * | 1941-07-07 | 1944-08-29 | William L Ulmer | Flux composition |
| CN1105616A (en) * | 1994-01-17 | 1995-07-26 | 江立新 | Sliver soldering paste |
| CN1176162A (en) * | 1996-09-11 | 1998-03-18 | 上海龙星结构工程公司 | Gaseous brazing agent |
| CN1273155A (en) * | 1999-05-08 | 2000-11-15 | 德古萨－于尔斯股份公司 | Flux and hard lead welding difficult wetted metal material |
| CN1307945A (en) * | 2000-12-28 | 2001-08-15 | 南京宝色钛业有限公司 | Silver soldering method for red copper crucible |
| CN1586795A (en) * | 2004-08-31 | 2005-03-02 | 广州有色金属研究院 | Copper welding paste for automatic brazing and its preparing method |
Non-Patent Citations (3)
| Title |
|---|
| 《汽车工艺与材料》 19890228 陈熙 桑塔纳轿车生产中的铜钎焊新工艺 , 第02期 * |
| 《焊接技术》 19930228 林兴华 异种金属的钎焊 , 第02期 * |
| 《钎焊手册》 20080901 张启运，庄鸿寿 3.7硬钎剂 117-118 1-3 , 1 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692112A (en) * | 2013-12-05 | 2014-04-02 | 四川达宇特种车辆制造厂 | Silver brazing flux suitable for carbon steel, stainless steel, copper and copper alloy |
| CN103692112B (en) * | 2013-12-05 | 2016-01-20 | 四川达宇特种车辆制造厂 | Be applicable to carbon steel, stainless steel, Copper and its alloy silver brazing brazing flux |
| CN105171274A (en) * | 2015-09-15 | 2015-12-23 | 铜陵新鑫焊材有限公司 | Formula for brazing flux of copper welding rod |
| CN105965178A (en) * | 2016-06-15 | 2016-09-28 | 上海和伍复合材料有限公司 | High-activity brazing agent and preparation method thereof |
| CN106041355A (en) * | 2016-07-20 | 2016-10-26 | 安徽华众焊业有限公司 | Copper-based soldering paste |
| CN112453764A (en) * | 2020-12-12 | 2021-03-09 | 江西洪都航空工业集团有限责任公司 | Preparation method of flame brazing copper brazing material |
| CN114083171A (en) * | 2021-12-06 | 2022-02-25 | 韩雷 | Self-welding integrated copper-phosphorus soldering lug and preparation method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20110216 |