CN1211179C - Copper, aluminium, stainless steel composite brazing method - Google Patents
Copper, aluminium, stainless steel composite brazing method Download PDFInfo
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- CN1211179C CN1211179C CN 03140391 CN03140391A CN1211179C CN 1211179 C CN1211179 C CN 1211179C CN 03140391 CN03140391 CN 03140391 CN 03140391 A CN03140391 A CN 03140391A CN 1211179 C CN1211179 C CN 1211179C
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Abstract
The present invention relates to a composite brazing method for copper, aluminum and stainless steel. The method comprises the following steps; a transition layer is arranged between copper and aluminum; the transition layer is a stainless steel sheet; the thickness of the stainless steel sheet is from 0.1 to 0.5mm; after a copper, an aluminum and a stainless steel workpieces to be brazed are cleaned and de-oiled, two surfaces of the aluminum workpiece are brushed with potassium fluoroaluminate eutectic brazing flux and then is sprinkled with aluminum silicon eutectic brazing material; then, the aluminum workpiece is arranged on the brazed surface of the stainless steel workpiece. One side of the transition layer-the stainless steel sheet is coated with the potassium fluoroaluminate brazing flux and then is sprinkled with copper phosphorus base brazing material, and the other side not coated with the brazing flux and the brazing material is arranged on the aluminum workpiece provided with the brazing flux and the brazing material; then, a copper sheet is covered to braze. Because the present invention adopts the mode that the stainless steel sheet is arranged between the copper and the aluminum as the transition brazing layer, the copper, the aluminum and the stainless steel are brazed in a composite mode to technologically form a copper-stainless steel, a stainless steel-aluminum and an aluminum-stainless steel brazing surfaces; accordingly, the defect of poor brazing quality caused by the generation of copper and aluminum brittleness compounds on the brazing surfaces because of the direct contact brazing of copper-aluminum.
Description
Technical field
The present invention relates to a kind of method of metal solder, particularly a kind of disposable method of finishing copper, aluminium, the compound soldering of stainless steel of high frequency induced pressure braze machine of utilizing.
Background technology
Using at present composite metal products such as high frequency induced pressure braze machine soldering copper-stainless-steel or aluminium-stainless steel is mature technique very, and the composite brazing goods of above-mentioned metal are outlet in enormous quantities in recent years.Yet, along with the variation and the seriation of composite metal product, and need be with the compound soldering of copper-aluminium-stainless steel, in the middle of relate to the soldering of two kinds of metals of copper-aluminium.Yet, still find no at present brazing material and the method that is suitable for the direct composite brazing of copper-aluminium, though the tinbase of employing welding material brazed copper-aluminium is also arranged, but the serviceability temperature of soldering goods generally reaches 400-600 ℃, far above tinbase welding material fusing point, do not satisfy instructions for use, therefore, copper-aluminium composite article that the tinbase welding material is used for using under the soldering high temperature there is no practical significance.Chinese patent CN1144731A discloses a kind of copper-aluminium joint friction-welding technique method, its technical scheme mainly be with copper pipe, aluminum pipe device in the special-purpose rolling clamp of lathe, mobile rolling clamp, aluminum pipe one end is entered in the copper pipe, and make it in moment, finish welding by two intermetallic phase attritions wiping.Its main purpose has provided a kind of copper as can be seen, aluminum pipe spare is realized two intermetallic connections by friction from above-mentioned process, does not relate to the method for copper, aluminium, the compound soldering of stainless steel.
Summary of the invention
The object of the present invention is to provide a kind of compound method for welding of copper, aluminium, stainless steel of guaranteeing welding quality, high finished product rate.
Technical scheme of the present invention is: the method for a kind of copper, aluminium, the compound soldering of stainless steel comprises the steps:
One transition zone is set between copper spare and aluminum component, and described transition zone is a stainless steel substrates, and its thickness is 0.1～0.5mm;
Copper, aluminium, the stainless steel work-piece of required soldering are cleaned, remove grease, brush potassium fluoroaluminate eutectic brazing flux, spill the al-si eutectic solder, place on the quilt weldering surface of stainless steel part on aluminum component two surfaces;
Coat the potassium fluoborate brazing flux in the one side of transition zone stainless steel substrates, spill copper phosphorus base solder, the one side that is not coated with brazing flux, solder is placed on the aluminum component with the brazing flux solder, cover copper spare again and be equipped with weldering;
The weldment splicing fixedly is placed on soldering in the high frequency induced pressure braze machine.
The present invention is provided with a stainless steel substrates as the transition brazing layer owing to having adopted between copper and aluminium, make copper, aluminium, the compound soldering of stainless steel on technology, form copper-stainless steel, stainless steel-aluminium, three brazing filler metal faces of aluminium-stainless steel, because copper-stainless soldering strength is higher than the soldering strength of aluminium-copper far away, thus overcome copper-aluminium directly touch brazing filler metal face that soldering brings produce copper, aluminium frangible compounds and cause poor welding quality drawback, guaranteed the quality of product.
The invention will be further described below in conjunction with accompanying drawing:
Description of drawings
Fig. 1 is a braze-welded structure schematic diagram of the present invention;
Fig. 2 is applied to the structural representation of the soldering of sandwich stainless-steel pan for the present invention;
Fig. 3 is the partial enlarged view of Fig. 2.
The specific embodiment
The present invention as shown in Figure 1, the method for a kind of copper, aluminium, the compound soldering of stainless steel comprises the steps:
Between copper spare 1 and aluminum component 5 transition zone is set, described transition zone is a stainless steel substrates 3, and its thickness is 0.1～0.5mm;
Brush potassium fluoroaluminate eutectic brazing flux, spill al-si eutectic solder 4,6 on 5 liang of surfaces of aluminum component, place on the quilt weldering surface of stainless steel work-piece 7;
Coat the potassium fluoborate brazing flux in the one side of transition zone stainless steel substrates 3, spill copper phosphorus base solder 2, the one side that is not coated with brazing flux, solder is placed on the aluminum component 5 with the brazing flux solder, cover copper spare 1 again and be equipped with weldering;
The weldment splicing fixedly is placed on soldering in the high frequency induced pressure braze machine.
The preferred thickness of the stainless steel substrates that above-mentioned transition zone adopted is 0.2～0.3mm.
Illustrate that below in conjunction with specific embodiment the present invention is in industrial application.
Embodiment one:
Adopt the present invention such as Fig. 2, shown in Figure 3, use the 0.2mm stainless steel substrates to make transition zone, soldering copper sheet thickness is 0.5mm, and aluminium plate thickness 3mm, thickness 0.5mm diameter are 200 in the stainless steel sandwich pot of 180mm.It is all qualified that inspection is estimated, knocked to postwelding.Do total dry combustion method experiment, 1 of weld cracking, qualified 199.Qualification rate is not less than 99%.(qualification rate of soldering stainless steel-aluminium-stainless steel sandwich pot requires to be not less than 98%)
Embodiment two:
Adopt the present invention such as Fig. 2, shown in Figure 3, use the 0.2mm stainless steel substrates to make transition zone, soldering copper sheet thickness 0.6mm, aluminium plate thickness 2.4mm, thickness 0.6mm diameter are 200 in the stainless steel sandwich pot of 280mm.It is all qualified that inspection is estimated, knocked to postwelding.Do total dry combustion method experiment, 2 of weld crackings, qualified 198.Qualification rate is not less than 99%.
Embodiment three:
Adopt the present invention, use the stainless ladle egative film of 0.3mm to make transition zone, soldering copper sheet bag egative film thickness 0.6mm, aluminium plate thickness 3mm, thickness 0.6mm diameter are 200 in pot at the bottom of the stainless ladle of 240mm.The postwelding range estimation is all qualified, knocks and checks that 1 product of discovery has defective.199 workpiece are dry combustion method experiment, 3 of weld crackings, qualified 196.Qualification rate is not less than 96%.(qualification rate of pot is not less than 98% at the bottom of soldering stainless steel-aluminium-stainless ladle).
The present invention has adopted the stainless steel substrates transition zone that is provided with between copper, aluminium, can disposablely finish the soldering of multiple different metal, controllable product quality system property height, yield rate is more than 98%, and introduce the transition zone stainless steel substrates, not only can reduce cost, and can guarantee the presentation quality of product.
Claims (2)
1, the method for a kind of copper, aluminium, the compound soldering of stainless steel is characterized in that comprising the steps:
Between copper spare (1) and aluminum component (5) transition zone is set, described transition zone is a stainless steel substrates (3), and its thickness is 0.1～0.5mm;
Copper, aluminium, the stainless steel work-piece of required soldering are cleaned, remove grease, brush potassium fluoroaluminate eutectic brazing flux, spill al-si eutectic solder (4), (6), place on the quilt weldering surface of stainless steel part (7) on aluminum component (5) two surfaces;
One side at transition zone stainless steel substrates (3) is coated the potassium fluoborate brazing flux, is spilt copper phosphorus base solder (2), and the one side that is not coated with brazing flux, solder is placed on the aluminum component (5) with the brazing flux solder, covers copper spare (1) again and is equipped with weldering;
The weldment splicing fixedly is placed on soldering in the high frequency induced pressure braze machine.
2, the method for copper according to claim 1, aluminium, the compound soldering of stainless steel is characterized in that the thickness of the stainless steel substrates (3) that above-mentioned transition zone adopts is 0.2～0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03140391 CN1211179C (en) | 2003-09-04 | 2003-09-04 | Copper, aluminium, stainless steel composite brazing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03140391 CN1211179C (en) | 2003-09-04 | 2003-09-04 | Copper, aluminium, stainless steel composite brazing method |
Publications (2)
| Publication Number | Publication Date |
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| CN1522820A CN1522820A (en) | 2004-08-25 |
| CN1211179C true CN1211179C (en) | 2005-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03140391 Expired - Fee Related CN1211179C (en) | 2003-09-04 | 2003-09-04 | Copper, aluminium, stainless steel composite brazing method |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080245845A1 (en) * | 2007-04-04 | 2008-10-09 | Lawrence Bernard Kool | Brazing formulation and method of making the same |
| CN102430826A (en) * | 2011-11-01 | 2012-05-02 | 广东三A不锈钢制品集团有限公司 | Stainless steel pot bottom and aluminum sheet compounding technique |
| CN104439731B (en) * | 2014-11-24 | 2017-01-04 | 中国兵器科学研究院宁波分院 | A kind of steel-attached seat of aluminum Welding Structure and preparation method |
| CN104923935A (en) * | 2015-06-29 | 2015-09-23 | 山东钢铁股份有限公司 | Method for welding large-thickness slabs having high alloy content |
| CN107175395B (en) * | 2017-05-31 | 2019-07-02 | 重庆科技学院 | The method for improving Al-Cu point quality |
| CN108145267B (en) * | 2018-01-05 | 2020-02-28 | 山东建筑大学 | High-frequency induction brazing method for protective valve of automatic fire extinguishing device of high-altitude aircraft |
| CN110181194B (en) * | 2019-07-03 | 2021-06-11 | 广东省科学院中乌焊接研究所 | Compound brazing material and brazing process |
| CN114406521B (en) * | 2022-01-14 | 2023-08-11 | 浙江银轮机械股份有限公司 | Composite layer material for copper-aluminum brazing and preparation method and application thereof |
| CN115070257B (en) * | 2022-06-21 | 2023-09-26 | 郑州机械研究所有限公司 | Aluminum-silicon-copper solder foil and preparation method and application thereof |
| CN115255532A (en) * | 2022-07-27 | 2022-11-01 | 浙江银轮机械股份有限公司 | Brazing method of copper material and aluminum material and brazing assembly prepared by brazing method |
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| CN1522820A (en) | 2004-08-25 |
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