CN103692112A - Silver brazing flux suitable for carbon steel, stainless steel, copper and copper alloy - Google Patents
Silver brazing flux suitable for carbon steel, stainless steel, copper and copper alloy Download PDFInfo
- Publication number
- CN103692112A CN103692112A CN201310660425.0A CN201310660425A CN103692112A CN 103692112 A CN103692112 A CN 103692112A CN 201310660425 A CN201310660425 A CN 201310660425A CN 103692112 A CN103692112 A CN 103692112A
- Authority
- CN
- China
- Prior art keywords
- copper
- brazing
- stainless steel
- carbon steel
- copper alloy
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3603—Halide salts
- B23K35/3605—Fluorides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3606—Borates or B-oxides
Abstract
The invention discloses a silver brazing flux suitable for carbon steel, stainless steel, copper and copper alloy, which adopts the following formula in parts by weight: 40 to 42 parts by weight of boric acid, 40 to 42 parts by weight of potassium fluoride, 12 to 15 parts by weight of potassium fluoborate and 2 to 5 parts by weight of potassium chloride. The brazing flux has the advantages of low melting temperature, strong activity, high brazing seam quality and easiness for cleaning up brazing residues.
Description
Technical field
The present invention relates to a kind of brazing flux, be specifically related to a kind of carbon steel, stainless steel, copper and copper alloy silver brazing brazing flux of being applicable to, belong to material science.
Background technology
The flux using when brazing flux is soldering, its effect is the oxide of removing solder and mother metal surface, and protects weldment and liquid solder in brazing process, to avoid oxidation, improves the wetability of liquid solder butt-welding fitting.For most of method for welding, brazing flux is indispensable.
The at present conventional brazing flux the adopting hardening of easily luming, can cause very large waste.
Summary of the invention
The object of the present invention is to provide a kind of fusion temperature low, active strong prevented from caking hardening, brazing quality is good, the brazing flux of brazing easy-clear.
The present invention is achieved in that
Be applicable to carbon steel, stainless steel, copper and a copper alloy silver brazing brazing flux, the formula of its parts by weight is:
Boric acid (H
3bO
3): 40～42 weight portions
Potassium fluoride (KF): 40～42 weight portions
Potassium fluoborate (KBF
4): 12～15 weight portions
Potassium chloride (KCl): 2～5 weight portions.
Further scheme is: be applicable to carbon steel, stainless steel, copper and copper alloy silver brazing brazing flux, the formula of its parts by weight is:
Boric acid (H
3bO
3): 42 weight portions
Potassium fluoride (KF): 42 weight portions
Potassium fluoborate (KBF4): 14 weight portions
Potassium chloride (KCl): 2 weight portions.
Described in the present invention also provides, be applicable to the preparation method of brazing flux for carbon steel, stainless steel, copper and copper alloy silver brazing, be: get pulverous four kinds of compositions, take in proportion, put into container;
In container, pour water into, mix well;
To container heating, remove moisture, boil 10 to 15min being no more than at the temperature of 200 ℃, carbon steel to be applicable to, stainless steel, copper and copper alloy silver brazing become white paste with brazing flux.
Further scheme is: described container is crucible.
Further scheme is: described water is distilled water.
Further scheme is: describedly boil 10 to 15min being no more than at the temperature of 200 ℃, temperature is not less than 100 ℃.
Further scheme is: described four kinds of compositions are pure for analyzing.
The principle of this patent is: it is matrix that this brazing flux is selected boric acid, then adds potassium fluoride, potassium fluoborate, potassium chloride and obtain suitable active temperature and strengthen deoxidation compound ability.
Boric acid H
3bO
3during heating, be decomposed to form boric anhydride B
2o
3
2H
3BO
3→B
2O
3+3H
2O↑
The fusing point of boric anhydride is 580 ℃, and it can form with the oxide of iron, nickel and copper meltable borate and float on brazed seam surface with the form of slag, can reach striping, can play mechanical protection effect again.
The function that adds KF and KCl is the ability that reduces the viscosity of brazing flux and improve deoxidation compound.
In order further to reduce its fusion temperature and to improve its activity, add potassium fluoborate KBF
4, KBF
4fusing point is 540 ℃, after fusing, is decomposed into:
KBF
4→KF+BF
3
The BF separating out
3the ability with extremely strong deoxidation compound.
The present invention's advantage is compared with prior art: it is low that this brazing flux formula has fusion temperature, and brazing flux viscosity is good, active strong, 550 ℃ to 850 ℃ of active temperatures, and brazing quality is good, the advantage of brazing easy-clear.
The specific embodiment
Below by specific embodiment, the present invention is described further:
Embodiment mono-
Be applicable to carbon steel, stainless steel, copper and a copper alloy silver brazing brazing flux formula, the formula of its parts by weight is:
Boric acid (H
3bO
3): 42 weight portions
Potassium fluoride (KF): 42 weight portions
Potassium fluoborate (KBF
4): 14 weight portions
Potassium chloride (KCl): 2 weight portions.
Embodiment bis-
Be applicable to carbon steel, stainless steel, copper and a copper alloy silver brazing brazing flux, the formula of its parts by weight is:
Boric acid (H
3bO
3): 40 weight portions
Potassium fluoride (KF): 40 weight portions
Potassium fluoborate (KBF
4): 12 weight portions
Potassium chloride (KCl): 5 weight portions.
Embodiment tri-
Be applicable to carbon steel, stainless steel, copper and a copper alloy silver brazing brazing flux, the formula of its parts by weight is:
Boric acid (H
3bO
3): 41 weight portions
Potassium fluoride (KF): 41 weight portions
Potassium fluoborate (KBF
4): 15 weight portions
Potassium chloride (KCl): 4 weight portions.
In above-described embodiment, be applicable to carbon steel, stainless steel, copper and copper alloy silver brazing as follows by the preparation method of brazing flux:
Get and analyze pure, pulverous four kinds of compositions, take in proportion, put into crucible; In crucible, pour distilled water into, mix well; To crucible heating, remove moisture, being not less than 100 ℃, be no more than at the temperature of 200 ℃ and boil 10 to 15min, become white paste.
Utilize after the good brazing flux of concrete formulated of above-described embodiment, for Q235 carbon steel, 1Cr18Ni9Ti stainless steel and T1 red copper, carry out test process, spreading area mensuration, strength test, specific as follows:
Regulation according to JB/T6045-1992 < < hard solder with brazing flux > >, carries out soldering processes test to the silver brazing of the present invention's allotment with brazing flux, and result is as shown in table 1.
Table 1JB/T6045-1992 regulation specification requirement result of the test
According to GB11364-2008 < < solder wetting test method > >, various silver-colored brazing fluxes are coordinated to BAg45CuZn silver solder, at 780 ℃, Q235 carbon steel, 1Cr18Ni9Ti stainless steel and T1 red copper are carried out respectively to spreadability test, and contrasting silver-colored brazing flux QJ102 spreading area, result is as shown in table 2.
Table 2 spreadability test result
Claims (7)
1. be applicable to carbon steel, stainless steel, copper and copper alloy silver brazing brazing flux, it is characterized in that: described in be applicable to carbon steel, stainless steel, copper and copper alloy silver brazing and with the formula of the parts by weight of brazing flux be:
Boric acid: 40～42 weight portions
Potassium fluoride: 40～42 weight portions
Potassium fluoborate: 12～15 weight portions
Potassium chloride: 2～5 weight portions.
2. be applicable to according to claim 1 carbon steel, stainless steel, copper and copper alloy silver brazing brazing flux, it is characterized in that: described in be applicable to carbon steel, stainless steel, copper and copper alloy silver brazing and with the formula of the parts by weight of brazing flux be:
Boric acid: 42 weight portions
Potassium fluoride: 42 weight portions
Potassium fluoborate: 14 weight portions
Potassium chloride: 2 weight portions.
3. described in claim 1 or 2, be applicable to the preparation method of brazing flux for carbon steel, stainless steel, copper and copper alloy silver brazing, it is characterized in that:
Get pulverous four kinds of compositions, take in proportion, put into container;
In container, pour water into, mix well;
To container heating, remove moisture, boil 10 to 15min being no more than at the temperature of 200 ℃, carbon steel to be applicable to, stainless steel, copper and copper alloy silver brazing become white paste with brazing flux.
4. be applicable to according to claim 3 the preparation method of brazing flux for carbon steel, stainless steel, copper and copper alloy silver brazing, it is characterized in that: described container is crucible.
5. be applicable to according to claim 3 the preparation method of brazing flux for carbon steel, stainless steel, copper and copper alloy silver brazing, it is characterized in that: described water is distilled water.
6. be applicable to according to claim 3 the preparation method of brazing flux for carbon steel, stainless steel, copper and copper alloy silver brazing, it is characterized in that: describedly boil 10 to 15min being no more than at the temperature of 200 ℃, temperature is not less than 100 ℃.
7. be applicable to according to claim 3 the preparation method of brazing flux for carbon steel, stainless steel, copper and copper alloy silver brazing, it is characterized in that: described four kinds of compositions are pure for analyzing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310660425.0A CN103692112B (en) | 2013-12-05 | 2013-12-05 | Be applicable to carbon steel, stainless steel, Copper and its alloy silver brazing brazing flux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310660425.0A CN103692112B (en) | 2013-12-05 | 2013-12-05 | Be applicable to carbon steel, stainless steel, Copper and its alloy silver brazing brazing flux |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103692112A true CN103692112A (en) | 2014-04-02 |
| CN103692112B CN103692112B (en) | 2016-01-20 |
Family
ID=50353863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310660425.0A Active CN103692112B (en) | 2013-12-05 | 2013-12-05 | Be applicable to carbon steel, stainless steel, Copper and its alloy silver brazing brazing flux |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103692112B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104690448A (en) * | 2015-02-25 | 2015-06-10 | 江苏科技大学 | Cored copper welding wire suitable for small area brazing |
| CN104907722A (en) * | 2015-05-25 | 2015-09-16 | 郑州机械研究所 | Brass flux-cored brazing filler metal with reducing agents and flow aids and preparation method thereof |
| 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 |
| CN105252171A (en) * | 2015-11-13 | 2016-01-20 | 浙江新锐焊接科技股份有限公司 | Scaling powder |
| CN106270868A (en) * | 2016-08-30 | 2017-01-04 | 郑州机械研究所 | A kind of pure boron activated diffusion soldering connects the method for copper and steel |
| CN112658428A (en) * | 2020-12-15 | 2021-04-16 | 西安飞机工业（集团）有限责任公司 | Copper conduit flame brazing protective coating and protection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB454070A (en) * | 1935-02-07 | 1936-09-23 | British Thomson Houston Co Ltd | Improvements in and relating to fluxes for brazing |
| CN1105616A (en) * | 1994-01-17 | 1995-07-26 | 江立新 | Sliver soldering paste |
| 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 |
| CN101190483A (en) * | 2006-11-22 | 2008-06-04 | 上海斯米克焊材有限公司 | Cream-like silver brazing fluxes |
| CN101837526A (en) * | 2010-05-26 | 2010-09-22 | 惠州市五福工业技术有限公司 | Preparation method of silver solder paste and silver solder paste product |
| CN101972900A (en) * | 2010-10-26 | 2011-02-16 | 南阳防爆集团股份有限公司 | Soldering flux for copper brazing |
-
2013
- 2013-12-05 CN CN201310660425.0A patent/CN103692112B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB454070A (en) * | 1935-02-07 | 1936-09-23 | British Thomson Houston Co Ltd | Improvements in and relating to fluxes for brazing |
| CN1105616A (en) * | 1994-01-17 | 1995-07-26 | 江立新 | Sliver soldering paste |
| 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 |
| CN101190483A (en) * | 2006-11-22 | 2008-06-04 | 上海斯米克焊材有限公司 | Cream-like silver brazing fluxes |
| CN101837526A (en) * | 2010-05-26 | 2010-09-22 | 惠州市五福工业技术有限公司 | Preparation method of silver solder paste and silver solder paste product |
| CN101972900A (en) * | 2010-10-26 | 2011-02-16 | 南阳防爆集团股份有限公司 | Soldering flux for copper brazing |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104690448A (en) * | 2015-02-25 | 2015-06-10 | 江苏科技大学 | Cored copper welding wire suitable for small area brazing |
| CN104907722A (en) * | 2015-05-25 | 2015-09-16 | 郑州机械研究所 | Brass flux-cored brazing filler metal with reducing agents and flow aids and preparation method thereof |
| 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 |
| CN105252171A (en) * | 2015-11-13 | 2016-01-20 | 浙江新锐焊接科技股份有限公司 | Scaling powder |
| CN106270868A (en) * | 2016-08-30 | 2017-01-04 | 郑州机械研究所 | A kind of pure boron activated diffusion soldering connects the method for copper and steel |
| CN112658428A (en) * | 2020-12-15 | 2021-04-16 | 西安飞机工业（集团）有限责任公司 | Copper conduit flame brazing protective coating and protection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103692112B (en) | 2016-01-20 |
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Address after: 610000 Sichuan Chengdu Economic and Technological Development Zone (Longquanyi District) 118 Aerospace North Road Patentee after: Sichuan Aerospace Zhongtian Power Equipment Co., Ltd. Address before: 610000 No. 118 Aerospace North Road, Longquanyi Town, Chengdu City, Sichuan Province Patentee before: Sichuan Dayu Special Vehicle Factory |