CN103624356A - Method for large-area low-defect rate soldering of dissimilar metallic combination drive pipe structure - Google Patents
Method for large-area low-defect rate soldering of dissimilar metallic combination drive pipe structure Download PDFInfo
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- CN103624356A CN103624356A CN201310567412.9A CN201310567412A CN103624356A CN 103624356 A CN103624356 A CN 103624356A CN 201310567412 A CN201310567412 A CN 201310567412A CN 103624356 A CN103624356 A CN 103624356A
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- copper
- stainless steel
- solder
- dissimilar metal
- aluminium alloy
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/203—Fluxing, i.e. applying flux onto surfaces
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention discloses a method for large-area low-defect rate soldering of a dissimilar metallic combination drive pipe structure. The method is used for soldering the drive pipe type structure which combines dissimilar metal, including aluminum alloy and stainless steel, aluminum alloy and copper, copper and stainless steel and the like, which are matched in a large area, at a temperature lower than 250 DEG C. Before the soldering process, an aluminum alloy inner bore is processed in a nickel plating mode, and the outer wall of an inner tube is coated with a brazing filler metal layer in advance; a sealed aluminum alloy (or copper) base is placed in a furnace to be heated to 230-240 DEG C, a brazing flux is added into the furnace, and liquid-state brazing filler metal which is lower than 240 DEG C is poured into the aluminum alloy (or copper) inner bore; then, a stainless steel tube (or a copper tube) which is preheated to be lower than 240 DEG C is inserted into the inner bore, and surplus brazing filler metal overflows; the high-quality drive pipe type structure which combines the dissimilar metal is formed after solidification. According to the method for large-area low-defect rate soldering of the dissimilar metallic combination drive pipe structure, the soldering flux can be used for realizing large-area soldering of the drive pipe type structure which combines the dissimilar metal in the air, the soldering temperature is lower than 250 DEG C, the brazed rate is more than 95%, and the area of a single defect is not larger than 10 mm2.
Description
Technical field
The invention belongs to welding field, relate to a kind of method for welding.Specifically refer to dissimilar metal sleeve pipe class formation large area solders in air such as can realizing aluminium alloy, stainless steel, copper, welding temperature, lower than 250 ℃, obtains high-quality dissimilar metal assembled casing class solder structure.
Background technology
The application of dissimilar metal structure in national defence field and national product sphere of life is more and more, mainly can bring into play the comprehensive advantage of two kinds of different metals due to dissimilar metal, also may saving in weight, and some parts must adopt the connection of dissimilar metal, thus dissimilar metal in national defence fields such as Aero-Space, nuclear industry and each productive life field such as refrigerator, computer, automobile obtained application extremely widely.In numerous dissimilar metal structure applications, exist the sleeve pipe class formation that a large amount of dissimilar metal combination large area coordinates, relate to material and comprise the common used materials such as aluminium alloy, copper, stainless steel, purposes, mainly play the effects such as heat conduction, heat radiation.According to the instructions for use General Requirements temperature of these structures can not be too high (as temperature can not surpass 250 ℃ etc.), otherwise can affect the security reliability of element in structure or system.Therefore the general conventional method adopting is exactly the methods such as tight fit, mechanical connection, heat-conducting glue connection, there is the problems such as heat conductivility is poor, architecture quality is large, reliability is low in this class method of attachment, more and more can not meet high-quality requirement modern and following national defense industry production and national product life.That soldering can provide is permanent, high-quality, high performance connection, is the excellent process that dissimilar metal combination large area coordinates the sleeve pipe class formation that requires to manufacture.
But the soldering of the dissimilar metal combinations such as aluminium alloy, copper, stainless steel, exists: the oxide-film that the metal surfaces such as aluminium alloy, copper, stainless steel exist can affect the wetting of solder; Structural constituent, the physico-chemical property of dissimilar metal differ greatly, require solder and dissimilar metal all can be compatible etc. a soldering difficult problem.Especially these dissimilar metal sleeve pipe class formations can not surpass 250 ℃ to the requirement of temperature, otherwise components and parts wherein can lose effectiveness, therefore need to adopt soft soldering method, and these dissimilar metals are all to belong to the material that solder is more difficult.In addition these sleeve pipe class formation mating surfaces actively large, require soldering area large, the saturating rate of pricker is high, these are all the problems in soldering tech.
From aspects such as current document and patents, there is no at present any research both at home and abroad.Therefore, for overcoming the problems referred to above, the invention provides and a kind ofly can realize dissimilar metal sleeve pipe class formation large area solders in air such as aluminium alloy, stainless steel, copper, welding temperature, lower than 250 ℃, obtains high-quality dissimilar metal assembled casing class solder structure.
Summary of the invention
A kind of method that the object of this invention is to provide large area Low Defectivity solder dissimilar metal sleeve pipe class formation, is characterized in that: the dissimilar metal assembled casing class formation employing Sn63Pb37 eutectic solders such as the aluminium alloy that large area is coordinated and stainless steel, aluminium alloy and copper, copper and stainless steel and phosphoric acid brazing flux are welded together under the brazing temperature condition lower than 250 ℃.For aluminium alloy and stainless steel, aluminium alloy and copper two class dissimilar metal sleeve pipe class formations, aluminium alloy is external component, and there is the endoporus coordinating with bi-material centre, and stainless steel and copper are the inner tube coordinating with aluminium alloy endoporus; For copper and stainless steel dissimilar metal sleeve class formation, copper is external component, and there is the endoporus coordinating with stainless steel centre, and stainless steel is the inner tube coordinating with copper endoporus.The present invention can realize dissimilar metal large area solders in air such as aluminium alloy, copper, stainless steel, and welding temperature, lower than 250 ℃, obtains the cover tubing braze-welded structure that the dissimilar metal large area such as high-quality aluminium alloy, copper, stainless steel coordinate.Inner ratio of brazing area surpasses 95%, and single gas hole defect area is no more than 10mm
2.
Technical solution of the present invention is:
(1) external components such as aluminium alloy, copper are put into frock, adopt heat-resistant adhesive by the clearance seal of workpiece and frock, solidify 1～2 day;
(2) before soldering, first surface, the endoporus of aluminium alloy position to be welded plating is processed, adopted method plating one deck nickel such as chemical plating, plating, thickness is 8～15 μ m, and coating is wanted evenly, good with the binding ability of aluminum alloy surface;
(3) in stainless steel, copper etc., tube-surface applies last layer solder in advance.Solder is Sn63Pb37 eutectic solder, and brazing flux is phosphoric acid; Method is that tube-surface in the stainless steel that is preheated to 220～230 ℃, copper etc. was coated in the Sn63Pb37 solder trough that is placed into 230 ℃ of temperature after phosphoric acid brazing flux in 5～10 seconds, then takes out, and the brazing flux of remained on surface is removed; Also can adopt method tube-surface in stainless steel, copper etc. of iron soldering to apply one deck solder;
(4) external components such as aluminium alloy, copper being put into tube furnace and be heated to, after 230～240 ℃ of temperature, add brazing flux, is then that the Sn63Pb37 solder of 220～230 ℃ is poured in the endoporus of the external components such as aluminium alloy, copper by temperature; The external component that fills LIQUID Sn 63Pb37 solder is taken out from tube furnace;
(5) inner tube (stainless steel tube, copper pipe) that is preheated to 220～230 ℃ is inserted in the endoporus of external component (aluminium alloy, copper), overflowed unnecessary liquid solder, after solder cooled and solidified, form high-quality dissimilar metal assembled casing class formation.
In the method for a kind of large area Low Defectivity solder dissimilar metal sleeve pipe class formation provided by the present invention, described aluminum alloy materials comprises: 1070A, 2A14,2A16,2A20,3A21,3103,6061,6063,6A02; Stainless steel tube material comprises: ALSL304, ALSL304L, ALSL316, ALSL316L, 0Cr18Ni9Ti, 1Cr18Ni9Ti; Copper-clad is drawn together: oxygen-free copper, T1 and T2.Described tin-based solder is Sn63Pb37 eutectic solder.Described brazing flux is phosphoric acid.
Described aluminium alloy and stainless steel inserting depth are 100-500mm, fit-up gap 0.2-0.6mm.
The nickel plating technology that the position to be welded Nickel Plating Treatment coordinating with stainless steel tube (or copper pipe) on described aluminum alloy base adopts is chemical plating and plating.On described stainless steel tube (or copper pipe) outer wall, apply in advance one deck solder, can adopt iron soldering coated technique and dip brazing coated technique.Described aluminium alloy (or copper) base heating-up temperature is 230～240 ℃; Stainless steel (or copper) pipe heating-up temperature is 220～230 ℃.
Feature of the present invention is: 1, solved the large area solder of the dissimilar metal assembled casing class formations such as aluminium alloy, copper, stainless steel, 2, weldering temperature lower than 250 ℃, can effectively protect the Important Components in structure; 3, brazing quality high-quality, inner ratio of brazing area surpasses 95%, and single gas hole defect area is no more than 10mm
2.
The specific embodiment
Example 1: the example of the solder of aluminium alloy and stainless steel large area engage sleeves tubing structure is as shown in the table.
Example 2: the example of the solder of aluminium alloy and copper large area engage sleeves tubing structure is as shown in the table.
Example 3: the example of the solder of copper and stainless steel large area engage sleeves tubing structure is as shown in the table.
Claims (5)
1. a method for large area Low Defectivity solder dissimilar metal sleeve pipe class formation, is characterized in that: the dissimilar metal assembled casing class formation employing Sn63Pb37 eutectic solders such as the aluminium alloy that large area is coordinated and stainless steel, aluminium alloy and copper, copper and stainless steel and phosphoric acid brazing flux are welded together under the brazing temperature condition lower than 250 ℃.For aluminium alloy and stainless steel, aluminium alloy and copper two class dissimilar metal sleeve pipe class formations, aluminium alloy is external component, and there is the endoporus coordinating with bi-material centre, and stainless steel and copper are the inner tube coordinating with aluminium alloy endoporus; For copper and stainless steel dissimilar metal sleeve class formation, copper is external component, and there is the endoporus coordinating with stainless steel centre, and stainless steel is the inner tube coordinating with copper endoporus.Concrete steps are as follows:
(1) external components such as aluminium alloy, copper are put into frock, adopt heat-resistant adhesive by the clearance seal of workpiece and frock, solidify 1～2 day;
(2) before soldering, first surface, the endoporus of aluminium alloy position to be welded plating is processed, adopted method plating one deck nickel such as chemical plating, plating, thickness is 8～15 μ m, and coating is wanted evenly, good with the binding ability of aluminum alloy surface;
(3) in stainless steel, copper etc., tube-surface applies last layer solder in advance.Solder is Sn63Pb37 eutectic solder, and brazing flux is phosphoric acid; Method is that tube-surface in the stainless steel that is preheated to 220～230 ℃, copper etc. was coated in the Sn63Pb37 solder trough that is placed into 230 ℃ of temperature after phosphoric acid brazing flux in 5～10 seconds, then takes out, and the brazing flux of remained on surface is removed; Also can adopt method tube-surface in stainless steel, copper etc. of iron soldering to apply one deck solder;
(4) external components such as aluminium alloy, copper being put into tube furnace and be heated to, after 230～240 ℃ of temperature, add brazing flux, is then that the Sn63Pb37 solder of 220～230 ℃ is poured in the endoporus of the external components such as aluminium alloy, copper by temperature; The external component that fills LIQUID Sn 63Pb37 solder is taken out from tube furnace;
(5) inner tube (stainless steel tube, copper pipe) that is preheated to 220～230 ℃ is inserted in the endoporus of external component (aluminium alloy, copper), overflowed unnecessary liquid solder, after solder cooled and solidified, form high-quality dissimilar metal assembled casing class formation.
2. the method for a kind of large area Low Defectivity solder dissimilar metal sleeve pipe class formation according to claim 1, is characterized in that: described dissimilar metal socket fit-up gap 0.2-0.6mm.
3. the method for a kind of large area Low Defectivity solder dissimilar metal sleeve pipe class formation according to claim 1, it is characterized in that: the position to be welded Nickel Plating Treatment coordinating with stainless steel tube (or copper pipe) on described aluminum alloy base adopts chemical plating and electroplating technique, and thickness is 8～15 μ m.
4. the method for a kind of large area Low Defectivity solder dissimilar metal sleeve pipe class formation according to claim 1, it is characterized in that: on described stainless steel tube (or copper pipe) outer wall, apply in advance one deck solder, can adopt iron soldering coated technique and dip brazing coated technique.
5. the method for a kind of large area Low Defectivity solder dissimilar metal sleeve pipe class formation according to claim 1, is characterized in that: the inner ratio of brazing area of described dissimilar metal sleeve pipe class formation surpasses 95%, and single gas hole defect area is no more than 10mm
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310567412.9A CN103624356A (en) | 2013-11-14 | 2013-11-14 | Method for large-area low-defect rate soldering of dissimilar metallic combination drive pipe structure |
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| CN201310567412.9A CN103624356A (en) | 2013-11-14 | 2013-11-14 | Method for large-area low-defect rate soldering of dissimilar metallic combination drive pipe structure |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934534A (en) * | 2014-04-15 | 2014-07-23 | 北京卫星制造厂 | Vacuum welding method for thick film substrate and power shell |
| CN105643040A (en) * | 2016-03-23 | 2016-06-08 | 徐宏达 | Brazing method for aluminum and aluminum alloy |
| CN106938362A (en) * | 2017-04-24 | 2017-07-11 | 武汉理工大学 | A kind of connection method of magnetic pulse formation assistant brazing metal tube |
| CN107717156A (en) * | 2017-10-09 | 2018-02-23 | 湖北三江航天险峰电子信息有限公司 | A kind of unimach and tungsten alloy endoporus method for welding |
| CN108526637A (en) * | 2018-03-13 | 2018-09-14 | 西安航天发动机有限公司 | A kind of furnace brazing method of 1Cr18Ni9Ti stainless steel tubes and 5A06 aluminium-alloy pipes |
| CN109763124A (en) * | 2019-01-17 | 2019-05-17 | 首都航天机械有限公司 | A kind of narrow deep trouth surface leaching zinc uniformity control method of aluminium alloy flange disk |
| CN111001923A (en) * | 2019-11-11 | 2020-04-14 | 航天工程装备（苏州）有限公司 | Surface treatment method for stirring tool |
| CN111195763A (en) * | 2018-11-19 | 2020-05-26 | 中车唐山机车车辆有限公司 | Welding method of aluminum alloy and stainless steel for vehicle and train vehicle |
| CN111927335A (en) * | 2020-08-07 | 2020-11-13 | 江苏博联硕焊接技术有限公司 | Petroleum drilling pipe and preparation method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934534B (en) * | 2014-04-15 | 2016-03-30 | 北京卫星制造厂 | The vacuum welding method of a kind of thick film substrate and power shell |
| CN103934534A (en) * | 2014-04-15 | 2014-07-23 | 北京卫星制造厂 | Vacuum welding method for thick film substrate and power shell |
| CN105643040A (en) * | 2016-03-23 | 2016-06-08 | 徐宏达 | Brazing method for aluminum and aluminum alloy |
| CN106938362A (en) * | 2017-04-24 | 2017-07-11 | 武汉理工大学 | A kind of connection method of magnetic pulse formation assistant brazing metal tube |
| CN106938362B (en) * | 2017-04-24 | 2019-08-27 | 武汉理工大学 | A kind of connection method of magnetic pulse formation assistant brazing metal tube |
| CN107717156A (en) * | 2017-10-09 | 2018-02-23 | 湖北三江航天险峰电子信息有限公司 | A kind of unimach and tungsten alloy endoporus method for welding |
| CN107717156B (en) * | 2017-10-09 | 2019-11-19 | 湖北三江航天险峰电子信息有限公司 | A kind of unimach and tungsten alloy inner hole method for welding |
| CN108526637B (en) * | 2018-03-13 | 2020-05-08 | 西安航天发动机有限公司 | Furnace brazing method of 1Cr18Ni9Ti stainless steel pipe and 5A06 aluminum alloy pipe |
| CN108526637A (en) * | 2018-03-13 | 2018-09-14 | 西安航天发动机有限公司 | A kind of furnace brazing method of 1Cr18Ni9Ti stainless steel tubes and 5A06 aluminium-alloy pipes |
| CN111195763A (en) * | 2018-11-19 | 2020-05-26 | 中车唐山机车车辆有限公司 | Welding method of aluminum alloy and stainless steel for vehicle and train vehicle |
| CN109763124A (en) * | 2019-01-17 | 2019-05-17 | 首都航天机械有限公司 | A kind of narrow deep trouth surface leaching zinc uniformity control method of aluminium alloy flange disk |
| CN111001923A (en) * | 2019-11-11 | 2020-04-14 | 航天工程装备（苏州）有限公司 | Surface treatment method for stirring tool |
| CN111927335A (en) * | 2020-08-07 | 2020-11-13 | 江苏博联硕焊接技术有限公司 | Petroleum drilling pipe and preparation method thereof |
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Application publication date: 20140312 |