CN110625281A - Method for processing composite tube of stainless steel and lining copper - Google Patents
Method for processing composite tube of stainless steel and lining copper Download PDFInfo
- Publication number
- CN110625281A CN110625281A CN201910871439.4A CN201910871439A CN110625281A CN 110625281 A CN110625281 A CN 110625281A CN 201910871439 A CN201910871439 A CN 201910871439A CN 110625281 A CN110625281 A CN 110625281A
- Authority
- CN
- China
- Prior art keywords
- copper
- stainless steel
- wall
- cavity
- lining
- 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
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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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/003—Welding in 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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- B23K2103/22—Ferrous alloys and copper or alloys thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a method for processing a stainless steel and copper-lined composite pipe, which comprises the following steps: firstly, manufacturing a lining copper cavity; then, manufacturing a stainless steel pipe sleeve; then, assembling the lining copper cavity and the stainless steel pipe sleeve; then, welding the assembled lining copper cavity and the stainless steel pipe; and finally, cutting off the sealing end covers at two ends of the copper lining cavity to obtain the stainless steel and copper lining composite pipe. The invention has the beneficial effects that: during welding, the local deformation position on the welding composite surface between the outer wall of the lining copper cavity and the inner wall of the stainless steel pipe sleeve can be fully attached, so that the silver layer of the outer wall of the lining copper cavity can be fully and tightly attached to the nickel layer of the inner wall of the stainless steel pipe sleeve, the welding rate and the welding quality of the composite surface are improved, the heat conducting performance and the composite strength of the welded composite pipe are greatly improved, the wall thickness of the composite pipe is more uniform, and the high-precision composite requirement can be met.
Description
Technical Field
The invention relates to the technical field of processing of a stainless steel and copper-lined composite pipe, in particular to a processing method of a stainless steel and copper-lined composite pipe.
Background
The composite tube of stainless steel and copper lining has good heat-conducting property, and is more and more widely applied in life. The existing composite pipe for processing stainless steel and copper lining is generally processed and manufactured by adopting a mechanical rolling composite method, local deformation (such as pits and the like) possibly exists on a welding composite surface between the copper lining and the stainless steel, and the traditional mechanical rolling composite method can not enable the positions of the local deformation on the welding composite surface between the copper lining and the stainless steel to be tightly attached, so that during welding, the local deformation parts on the welding composite surface can not be in full contact, and broken welding occurs, so that the heat conductivity and the composite strength of the processed composite pipe are reduced, the wall thickness of the composite pipe is uneven, and the requirement of high precision cannot be met.
Disclosure of Invention
Aiming at the problems in the prior art, the invention mainly aims to provide a method for processing a stainless steel and copper-lined composite pipe, and aims to solve the problems that the composite pipe processed by the existing method for processing the stainless steel and copper-lined composite pipe is poor in heat conductivity and composite strength, uneven in wall thickness and incapable of meeting the requirement of high precision.
In order to achieve the purpose, the processing method of the composite pipe of the stainless steel and the lining copper, which is provided by the invention, comprises the following steps:
and S100, welding sealing end covers at two ends of the copper pipe to obtain a copper sealing cavity, wherein one sealing end cover is provided with a sealing guide pipe communicated with the inside of the copper sealing cavity.
S200, carrying out silver plating treatment on the welding surface of the outer wall of the copper sealing cavity to obtain the lining copper cavity.
S300, inserting the lining copper cavity into the stainless steel pipe sleeve, plating nickel on the inner wall of the stainless steel pipe sleeve, and attaching the welding surface of the lining copper cavity and the nickel-plated inner wall of the stainless steel pipe sleeve. And then the sealed conduit is used for inflating and pressurizing the inside of the lining copper cavity, so that the outer wall of the lining copper cavity is tightly attached to the inner wall of the stainless steel pipe sleeve, and then the sealed conduit is mechanically sealed.
S400, placing the assembled lining copper cavity and the stainless steel pipe sleeve into a vacuum furnace for welding.
S500, taking out the welded lining copper cavity and the stainless steel pipe sleeve for pressure relief, and then cutting off the sealing end cover from the outer wall of the stainless steel pipe sleeve to the lining copper cavity to obtain the composite pipe with the stainless steel pipe sleeve and the copper pipe compounded in high precision.
Preferably, in step S100, the copper tube and the end cap are sealed by argon arc welding or electron beam welding.
Preferably, in step S200, before the silver plating process is performed on the welding surface of the outer wall of the copper-sealed cavity, a finishing process is performed on the outer wall of the copper-sealed cavity. In step S300, the inner wall of the stainless steel pipe is subjected to a finish machining process before the nickel plating process is performed on the inner wall of the stainless steel pipe.
Compared with the prior art, the invention has the beneficial effects that: during welding, the local deformation position on the welding composite surface between the outer wall of the lining copper cavity and the inner wall of the stainless steel pipe sleeve can be fully attached, so that the silver layer of the outer wall of the lining copper cavity can be fully and tightly attached to the nickel layer of the inner wall of the stainless steel pipe sleeve, the welding rate and the welding quality of the composite surface are improved, the heat conducting performance and the composite strength of the welded composite pipe are greatly improved, the wall thickness of the composite pipe is more uniform, and the high-precision composite requirement can be met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram showing a three-dimensional cross-sectional view of a copper-lined cavity in an embodiment of a method for processing a composite tube of stainless steel and copper lining according to the present invention;
FIG. 2 is a perspective cross-sectional view of the stainless steel pipe sleeve and the copper-lined cavity after assembly in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a composite pipe according to an embodiment of the present invention;
the objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The invention provides a method for processing a stainless steel and copper-lined composite pipe.
Referring to fig. 1 to 3, fig. 1 is a perspective sectional structure view of a copper-lined cavity in an embodiment of a method for processing a composite tube of stainless steel and copper lining according to the present invention, fig. 2 is a perspective sectional structure view of a stainless steel tube sleeve and a copper-lined cavity assembled in an embodiment of the present invention, and fig. 3 is a cross-sectional view of a composite tube in an embodiment of the present invention.
In the embodiment of the invention, the processing method of the stainless steel and copper-lined composite pipe comprises the following steps:
s100, as shown in FIG. 1, welding the end caps 120 at two ends of the copper tube 110 by argon arc welding to form a copper sealed cavity, wherein the left end cap 120 is provided with a sealing conduit 121 communicated with the inside of the copper sealed cavity, so as to inflate and pressurize the copper sealed cavity subsequently.
In step S100, the copper tube 110 and the end cap 120 may be sealed by electron beam welding.
S200, carrying out silver plating treatment on the welding surface 111 of the outer wall of the copper sealing cavity, thereby obtaining the lining copper cavity 100.
Preferably, in step S200, before performing the silver plating process on the welding surface 111 of the outer wall of the copper-sealed cavity, the outer wall of the copper-sealed cavity is subjected to a finish machining process to improve the bonding force between the silver layer and the welding surface 111 of the outer wall of the copper-sealed cavity, so as to improve the subsequent welding quality between the stainless steel pipe sleeve 200 and the copper pipe 110.
S300, as shown in FIG. 2, the copper lining cavity 100 is inserted into the stainless steel pipe sleeve 200, the inner wall of the stainless steel pipe sleeve 200 is plated with nickel, and the welding surface 111 of the copper lining cavity 100 is attached to the nickel-plated inner wall of the stainless steel pipe sleeve 200. Then, the inner lining copper cavity 100 is inflated and pressurized through the sealing conduit 121, so that the outer wall of the lining copper cavity 100 is tightly attached to the inner wall of the stainless steel pipe sleeve 200, and then the sealing conduit 121 is mechanically sealed.
Preferably, in step S300, before the nickel plating process is performed on the inner wall of the stainless steel tube 200, the inner wall of the stainless steel tube 200 is subjected to a finish machining process to improve the bonding force between the nickel layer and the inner wall of the stainless steel tube 200, thereby improving the subsequent welding quality between the stainless steel tube 200 and the copper tube.
S400, placing the assembled lining copper cavity 100 and the stainless steel pipe sleeve 200 into a vacuum furnace for welding.
During welding, the strength of the lining copper cavity 100 at high temperature is reduced, the deformable degree is enhanced, and the high-pressure gas inside the lining copper cavity expands. Under the action of high-pressure gas expansion pressure, the lining copper cavity 100 also expands outwards, so that the local deformation position on the welding composite surface between the outer wall of the lining copper cavity 100 and the inner wall of the stainless steel pipe sleeve 200 can be fully attached, and further, the silver layer on the outer wall of the lining copper cavity 100 can be more fully and tightly attached to the nickel layer on the inner wall of the stainless steel pipe sleeve 200.
When the temperature in the vacuum furnace further reaches the welding temperature, a metallurgical reaction is carried out between the silver layer on the outer wall of the lining copper cavity 100 and the nickel layer on the inner wall of the stainless steel pipe sleeve 200, so that high-quality welding is realized.
S500, taking out the welded lining copper cavity 100 and the stainless steel pipe sleeve 200 for pressure relief, and cutting off the sealing end cover 120 from the outer wall of the stainless steel pipe sleeve 200 to the lining copper cavity 100 to obtain the composite pipe 300 with the stainless steel pipe sleeve 200 and the copper pipe 110 compounded in high precision as shown in the figure 3.
Compared with the prior art, the invention has the beneficial effects that: during welding, the local deformation position on the welding composite surface between the outer wall of the lining copper cavity 100 and the inner wall of the stainless steel pipe sleeve 200 can be fully attached, so that the silver layer on the outer wall of the lining copper cavity 100 can be fully and tightly attached to the nickel layer on the inner wall of the stainless steel pipe sleeve 200, the welding rate and the welding quality of the welding composite surface are improved, the heat conductivity and the composite strength of the welded composite pipe 300 are greatly improved, the wall thickness of the composite pipe 300 is more uniform, and the requirement of high-precision composite can be met.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A method for processing a stainless steel and copper-lined composite pipe is characterized by comprising the following steps:
s100, welding sealing end covers at two ends of a copper pipe to obtain copper sealing cavities, wherein one sealing end cover is provided with a sealing guide pipe communicated with the interior of the copper sealing cavity;
s200, carrying out silver plating treatment on the welding surface of the outer wall of the copper sealing cavity to obtain a lining copper cavity;
s300, inserting the copper-lined cavity into a stainless steel pipe sleeve, plating nickel on the inner wall of the stainless steel pipe sleeve, and mutually attaching the welding surface of the copper-lined cavity and the nickel-plated inner wall of the stainless steel pipe sleeve; inflating and pressurizing the inside of the copper lining cavity through the sealing guide pipe to ensure that the outer wall of the copper lining cavity is tightly attached to the inner wall of the stainless steel pipe sleeve, and then mechanically sealing the sealing guide pipe;
s400, placing the assembled lining copper cavity and the stainless steel pipe sleeve into a vacuum furnace for welding;
s500, taking out the welded lining copper cavity and the stainless steel pipe sleeve for pressure relief, and then cutting off the sealing end cover from the outer wall of the stainless steel pipe sleeve to the lining copper cavity to obtain the composite pipe with the stainless steel pipe sleeve and the copper pipe compounded in high precision.
2. The method according to claim 1, wherein in step S100, the copper tube and the end cap are sealed by argon arc welding or electron beam welding.
3. The method according to claim 1 or 2, wherein in step S200, the outer wall of the copper-sealed chamber is subjected to a finishing process before the silver plating process is performed on the welding surface of the outer wall of the copper-sealed chamber.
4. The method of claim 3, wherein the inner wall of the stainless steel pipe is subjected to a finish machining process before the nickel plating process is performed on the inner wall of the stainless steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910871439.4A CN110625281A (en) | 2019-09-16 | 2019-09-16 | Method for processing composite tube of stainless steel and lining copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910871439.4A CN110625281A (en) | 2019-09-16 | 2019-09-16 | Method for processing composite tube of stainless steel and lining copper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110625281A true CN110625281A (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910871439.4A Pending CN110625281A (en) | 2019-09-16 | 2019-09-16 | Method for processing composite tube of stainless steel and lining copper |
Country Status (1)
| Country | Link |
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| CN (1) | CN110625281A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115283944A (en) * | 2022-07-06 | 2022-11-04 | 南京三乐集团有限公司 | Method for manufacturing stainless steel-copper composite thin-walled tube |
Citations (7)
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| CN102155592A (en) * | 2011-04-19 | 2011-08-17 | 大连海事大学 | End socket structure of copper and steel bimetallic pipe and seal welding method thereof |
| EP2377627A1 (en) * | 2010-03-15 | 2011-10-19 | Bundy Refrigeraçao Brasil Industria E Comércio LTDA. | A bimetallic tube, apparatus comprising such a tube and method of manufacturing an apparatus comprising a bimetallic tube |
| CN102873127A (en) * | 2012-10-17 | 2013-01-16 | 夏雨 | Preparation method for composite layer metal pipeline |
| CN104227338A (en) * | 2014-07-21 | 2014-12-24 | 北京有色金属研究总院 | Preparation method for aluminum-stainless steel composite pipe for thermal control on spacecraft |
| CN104879577A (en) * | 2015-06-11 | 2015-09-02 | 马鞍山市圣火科技有限公司 | Manufacturing method of composite tube |
| CN106183220A (en) * | 2016-09-14 | 2016-12-07 | 哈尔滨工业大学（威海） | A kind of composite bimetal pipe Thermal expansion shrinkage combines production method |
| CN107225318A (en) * | 2017-06-08 | 2017-10-03 | 中国科学院电子学研究所 | The diffusion welding method of metal telescoping pieces |
-
2019
- 2019-09-16 CN CN201910871439.4A patent/CN110625281A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2377627A1 (en) * | 2010-03-15 | 2011-10-19 | Bundy Refrigeraçao Brasil Industria E Comércio LTDA. | A bimetallic tube, apparatus comprising such a tube and method of manufacturing an apparatus comprising a bimetallic tube |
| CN102155592A (en) * | 2011-04-19 | 2011-08-17 | 大连海事大学 | End socket structure of copper and steel bimetallic pipe and seal welding method thereof |
| CN102873127A (en) * | 2012-10-17 | 2013-01-16 | 夏雨 | Preparation method for composite layer metal pipeline |
| CN104227338A (en) * | 2014-07-21 | 2014-12-24 | 北京有色金属研究总院 | Preparation method for aluminum-stainless steel composite pipe for thermal control on spacecraft |
| CN104879577A (en) * | 2015-06-11 | 2015-09-02 | 马鞍山市圣火科技有限公司 | Manufacturing method of composite tube |
| CN106183220A (en) * | 2016-09-14 | 2016-12-07 | 哈尔滨工业大学（威海） | A kind of composite bimetal pipe Thermal expansion shrinkage combines production method |
| CN107225318A (en) * | 2017-06-08 | 2017-10-03 | 中国科学院电子学研究所 | The diffusion welding method of metal telescoping pieces |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115283944A (en) * | 2022-07-06 | 2022-11-04 | 南京三乐集团有限公司 | Method for manufacturing stainless steel-copper composite thin-walled tube |
| CN115283944B (en) * | 2022-07-06 | 2023-11-07 | 南京三乐集团有限公司 | Manufacturing method of stainless steel-copper composite thin-wall tube |
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Application publication date: 20191231 |