CN105171339A - Method for manufacturing inner wall composite pipe through hydraulic expansion - Google Patents
Method for manufacturing inner wall composite pipe through hydraulic expansion Download PDFInfo
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- CN105171339A CN105171339A CN201510316426.2A CN201510316426A CN105171339A CN 105171339 A CN105171339 A CN 105171339A CN 201510316426 A CN201510316426 A CN 201510316426A CN 105171339 A CN105171339 A CN 105171339A
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- pipe
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- 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
Abstract
The invention provides a method for achieving inner wall compositing of a metal pipe and belongs to the field of metal composite materials. According to the technical scheme, the outer wall of a composite-layer pipe and the inner wall of a base-layer pipe are ground to expose fresh metals, the composite-layer pipe and the base-layer pipe are welded to form a sealed space, the sealed space is vacuumized, and a composite pipe blank is obtained; a certain amount of water is added to the composite pipe blank according to the thickness of a composite pipe in proportion, and the composite blank is welded and sealed; the composite pipe blank with water is put into an electric furnace and sintered at a certain temperature generally ranging from 300 DEG C to 1100 DEG C for 30 minutes to 4 hours, water is changed into water vapor to generate pressure for pressing the base layer, meanwhile the two metals interdiffuse at the high temperature, and the purpose of composting different metals is achieved; and finally forming processing such as cutting head leveling is conducted, and a finished product is obtained.
Description
Technical field
The invention belongs to metallic composite field, particularly relate to a kind of method of hydraulic expanding multiple tube.
Background technology
Present inwall multiple tube major way is composite plate multi-layer is rolled into tubular inwards, then welds.Large-caliber pipe fittings cladding adopts joint strip or the process of built-up welding mode, and small-bore pipe fitting cannot weld.Also have report introduction to adopt the method for continuous casting to prepare inwall multiple tube, but cost can be very high.And the method adopting the present invention to introduce is to prepare inwall multiple tube, cost is low, lumber recovery is high, be the multiple tube of real interior wall seamless, and all size can be produced.The multiple tube of Large Diameter Pipeline is welded often through coiled sheet plate, and pipe with small pipe diameter welding is difficult, finds a kind of blank for can fill up this product of minor diameter multiple tube for the multiple tube processing technology of pipe with small pipe diameter.
Summary of the invention
The present invention is a kind of method realizing metal pipe internal wall compound, the composite pipe of the specification that varies in size can be produced, especially the multiple tube processing pipe with small pipe diameter can be carried out, especially the metal composite pipe production field of 50mm is less than at external diameter, this technique has the advantages that cost is low, lumber recovery is high, can produce real inwall seamless multiple tube.
Technical scheme of the present invention is: a kind of method of hydraulic expanding inwall multiple tube, is characterized in that: comprise the following steps: 1) pretreatment, and the basic unit of getting the first metal manages, bimetallic composite bed pipe carries out surface treatment and exposes fresh metal; Step 2) welding composite pipe blank, is inserted in composite bed pipe in basic unit's pipe, the hole welding at composite bed pipe and basic unit's pipe two ends is formed airtight space, is vacuumized in the space between composite bed pipe and basic unit's pipe, form composite pipe blank; Step 3) adds a certain amount of hot pressing liquid in composite pipe blank inner chamber and composite bed pipe, with the two ends of plug welded seal composite pipe blank; Step 4) sintering heat rises, and the composite pipe blank of heating hydraulic fluid is put into electric furnace and sinters; Carry out the process of smoothing crop after step 5) sintering and be first product; Multiple tube first product, after drawbench is drawn into corresponding size, the process of annealing smoothing crop, obtains finished product.
Carry out surface treatment as composite bed pipe outer wall and basic unit's inside pipe wall in preferred described step 1), expose fresh metal.
As preferred technical scheme, polishing mode in step 1), is adopted to carry out surface treatment.
Alternatively preferred technical scheme, wherein adopts pickling mode to carry out surface treatment in step 1).
More tight in order to make double layer of metal combine when hot pressing, present invention further optimization technical scheme has: step 2) in composite bed pipe and basic unit's ligament be less than 1.5mm.
As preferably, in step 3), hot pressing liquid is water.
As preferably, according to composite bed tube thickness, material and condition of heat treatment, in step 4), sintering temperature is 300 DEG C ~ 1100 DEG C, insulation 30min ~ 4h.
In basic unit's tube material selection, as preferably, described first metal is selected from the one of stainless steel, carbon steel, copper, aluminium.In clad pipe Material selec-tion, be selected from a kind of alloy of or above-mentioned metal of nickel, titanium, tantalum, niobium, zirconium, stainless steel, copper, aluminium as preferred described second metal.
The problem not easily combined may be had when basic unit's pipe and composite bed pipe cold draw performance differ greatly, have for this problem further technical scheme of the present invention: between basic unit's pipe and composite bed pipe, be socketed with the transition zone pipe being easy to corrupt split, described transition zone pipe metal is selected from the one of titanium, copper, aluminium.
Beneficial effect of the present invention: the present invention is a kind of method realizing metal pipe internal wall compound, water can be utilized to be transformed into pressure compression basic unit pipe, clad pipe that steam produces, two kinds of metal at high temperature phase counterdiffusion simultaneously, reach dissimilar metal composite goal.Achieving that the metal composite pipe obtained is real is seamless, operation is few, and more with low cost than composite plate roll bending welding tube-making method.
Accompanying drawing explanation
Fig. 1 is the structural representation of composite pipe blank of the present invention.
Fig. 2 is the right view of Fig. 1.
In figure, 1, basic unit's pipe, 2, composite bed pipe, 3, plug, 4, welded seam, 5, hot pressing liquid.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Embodiment one:
The method of a kind of hydraulic expanding inwall multiple tube shown in 1,2 by reference to the accompanying drawings, comprises the following steps: step 1) pretreatment, gets basic unit's pipe 1 of the first metal, bimetallic composite bed pipe 2 carries out surface treatment and expose fresh metal; The outer wall of the inwall of basic unit's pipe 1 and composite bed pipe 2 is carried out surface and carries out grinding process, expose fresh metal.Also the pickling such as hydrochloric acid or sulfuric acid can be adopted in other embodiments to carry out surface treatment.
Step 2) welding composite pipe blank preparation, be inserted in by composite bed pipe 2 in basic unit's pipe 1, the hole welding at composite bed pipe 2 and basic unit's pipe 1 two ends is formed airtight space, and the weld seam formed is welded seam 4, space between composite bed pipe 2 and basic unit's pipe 1 is vacuumized, forms composite pipe blank.Wherein clad pipe and basic unit's ligament are less than 1.5mm.
It is water in the present embodiment that step 3) adds a certain amount of hot pressing liquid 5 in composite pipe blank inner chamber and composite bed pipe, and with the two ends of plug 3 welded seal composite pipe blank, wherein plug 3 can adopt mode and basic unit's pipe welded seal of welding.
Step 4) sintering heat rises, and the composite pipe blank of heating hydraulic fluid is put into electric furnace and sinters; According to composite bed thickness, material and condition of heat treatment, general sintering temperature is 300 DEG C ~ 1100 DEG C, insulation 30min ~ 4h.
Carry out the process of smoothing crop after step 5) sintering and be first product.Multiple tube first product, after drawbench is drawn into corresponding size, the process of annealing smoothing crop, obtains finished product.
In basic unit's tube material selection, the first metal is selected from the one of stainless steel, carbon steel, copper, aluminium.In clad pipe Material selec-tion, be selected from a kind of alloy of or above-mentioned metal of nickel, titanium, tantalum, niobium, zirconium, stainless steel, copper, aluminium as preferred the second metal.To specifically choose several metal so that this process to be described below.
The problem not easily combined may be had when basic unit's pipe and composite bed pipe cold draw performance differ greatly, have for this problem further embodiment of the present invention: between basic unit's pipe and composite bed pipe, be socketed with the transition zone pipe being easy to corrupt split, described transition zone pipe metal is selected from the one of titanium, copper, aluminium.
Embodiment two:
Prepare internal layer T2 fine copper 0.5mm(composite bed pipe) outer 304L stainless steel 3mm(basic unit pipe) multiple tube.First by copper clad pipe outer wall and basic unit's inside pipe wall polishing, expose fresh metal, clad pipe outer wall and basic unit's inside pipe wall gap are less than 1mm, and are inserted in 304L stainless steel basic unit pipe by the copper composite bed pipe of having polished.Adopt the mode of copper brazing to weld basic unit, composite bed pipe two ends, form airtight space and vacuumize, form copper/304L composite pipe blank.A certain amount of water is added to composite pipe blank, with the two ends of plug welded seal composite pipe blank by technique.Sinter under the composite pipe blank added water is put into electric furnace temperature, temperature is 600 DEG C ~ 900 DEG C, insulation 30min ~ 2h.Carry out the process of smoothing crop after sintering and be finished product.
Embodiment three:
Prepare unlined aluminium alloy 3mm(composite bed pipe)/outer T2 fine copper 0.1mm(basic unit pipe) multiple tube.First by aluminium alloy compound layer pipe outer wall and the inside pipe wall polishing of fine copper basic unit, expose fresh metal, clad pipe outer wall and basic unit's inside pipe wall gap are less than 1mm, and the aluminium alloy compound layer pipe of having polished is inserted in fine copper basic unit pipe, adopt the mode of copper brazing to weld basic unit, composite bed pipe two ends, form airtight space and vacuumize, form aluminium alloy/T2 composite pipe blank, a certain amount of water is added to composite pipe blank, welded seal composite pipe blank by technique.Sinter under the composite pipe blank added water is put into electric furnace temperature, temperature is 300 DEG C ~ 600 DEG C, insulation 30min ~ 4h.By finished product place to go from mould after sintering, carry out the process of smoothing crop and be finished product.
Embodiment four:
Prepare unlined aluminium alloy 3mm(composite bed pipe)/outer T2 fine copper 0.1mm(basic unit pipe) multiple tube.First by 15mm aluminium alloy clad pipe outer wall and the inside pipe wall polishing of 0.5 fine copper basic unit, expose fresh metal, clad pipe outer wall and basic unit's inside pipe wall gap are less than 1mm, and the aluminium alloy clad pipe of having polished is inserted in fine copper basic unit pipe, adopt the mode of copper brazing to weld basic unit, composite bed pipe two ends, form airtight space and vacuumize.A certain amount of water is added to composite pipe blank, welded seal composite pipe blank by technique.Sinter under the composite pipe blank added water is put into electric furnace temperature, temperature is 300 DEG C ~ 600 DEG C, insulation 30min ~ 4h.Directly go up drawbench about treating blank temperature to 200 DEG C after sintering, be drawn to 5 times of length, carry out the process of smoothing crop after the annealing process and be finished product.
Embodiment five:
Prepare internal layer R60702 zirconium 0.1mm(composite bed pipe)/intermediate layer TA2 pure titanium 0.05mm(transition zone)/outer carbon steel 3mm(basic unit pipe) and multiple tube.First 0.5mmR60702 zirconium clad pipe outer wall, intermediate layer 0.25mmTA2 inside and outside wall and 15mm carbon steel base layer inside pipe wall are polished, expose fresh metal, clad pipe outer wall and intermediate layer inwall, intermediate layer outer wall and basic unit's inside pipe wall gap are all less than 1mm, and by the pipe of the having polished assembled in sequence according to zirconium, pure titanium, carbon steel from inside to outside, adopt the mode of copper brazing to weld basic unit, intermediate layer and composite bed pipe two ends, form airtight space and vacuumize.A certain amount of water is added to composite pipe blank, welded seal composite pipe blank by technique.Sinter under the composite pipe blank added water is put into electric furnace temperature, temperature is 600 DEG C ~ 1100 DEG C, insulation 30min ~ 4h.Directly go up drawbench about treating blank temperature to 200 DEG C after sintering, be drawn to 5 times of length, carry out the process of smoothing crop after the annealing process and be finished product.
Although the present invention with preferred embodiment disclose as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (10)
1. a method for hydraulic expanding inwall multiple tube, is characterized in that: comprise the following steps:
Step 1) pretreatment, the basic unit of getting the first metal manages, bimetallic composite bed pipe carries out surface treatment and exposes fresh metal;
Step 2) welding composite pipe blank, is inserted in composite bed pipe in basic unit's pipe, the hole welding at composite bed pipe and basic unit's pipe two ends is formed airtight space, is vacuumized in the space between composite bed pipe and basic unit's pipe, form composite pipe blank;
Step 3) adds a certain amount of hot pressing liquid in composite pipe blank inner chamber and composite bed pipe, with the two ends of plug welded seal composite pipe blank;
Step 4) sintering heat rises, and the composite pipe blank of heating hydraulic fluid is put into electric furnace and sinters;
Carry out the process of smoothing crop after step 5) sintering and be first product; Multiple tube first product, after drawbench is drawn into corresponding size, the process of annealing smoothing crop, obtains finished product.
2. the method for hydraulic expanding inwall multiple tube according to claim 1, is characterized in that: in described step 1), composite bed pipe outer wall and basic unit's inside pipe wall carry out surface treatment, expose fresh metal.
3. the method for hydraulic expanding inwall multiple tube according to claim 1 and 2, is characterized in that: adopt polishing mode to carry out surface treatment in described step 1).
4. the method for hydraulic expanding inwall multiple tube according to claim 1 and 2, is characterized in that: adopt pickling mode to carry out surface treatment in described step 1).
5. the method for hydraulic expanding inwall multiple tube according to claim 1, is characterized in that: described step 2) in composite bed pipe and basic unit's ligament be less than 1.5mm.
6. the method for hydraulic expanding inwall multiple tube according to claim 1, is characterized in that: in described step 3), hot pressing liquid is water.
7. the method for hydraulic expanding inwall multiple tube according to claim 1, is characterized in that: in described step 4), sintering temperature is 300 DEG C ~ 1100 DEG C, insulation 30min ~ 4h.
8. the method for hydraulic expanding inwall multiple tube according to claim 1, is characterized in that: described first metal is selected from the one of stainless steel, carbon steel, copper, aluminium.
9. the method for the hydraulic expanding inwall multiple tube according to claim 1 or 8, is characterized in that: described second metal is selected from a kind of alloy of or above-mentioned metal of nickel, titanium, tantalum, niobium, zirconium, stainless steel, copper, aluminium.
10. the method for hydraulic expanding inwall multiple tube according to claim 1, is characterized in that: between basic unit's pipe and composite bed pipe, be socketed with the transition zone pipe being easy to corrupt split, described transition zone pipe metal is selected from the one of titanium, copper, aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510316426.2A CN105171339A (en) | 2015-06-11 | 2015-06-11 | Method for manufacturing inner wall composite pipe through hydraulic expansion |
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| CN201510316426.2A CN105171339A (en) | 2015-06-11 | 2015-06-11 | Method for manufacturing inner wall composite pipe through hydraulic expansion |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106078086A (en) * | 2016-06-12 | 2016-11-09 | 上海核工程研究设计院 | A kind of Reactor fuel element cladding zircaloy stainless steel composite pipe and preparation method thereof |
| CN107876617A (en) * | 2016-09-30 | 2018-04-06 | 比亚迪股份有限公司 | A kind of composite pipe and its manufacture method |
| CN110181228A (en) * | 2019-05-17 | 2019-08-30 | 东莞材料基因高等理工研究院 | A kind of manufacturing process of bimetallic mechanical composite-curve |
| CN113198869A (en) * | 2021-06-16 | 2021-08-03 | 山东胜利长龙管道科技有限公司 | High-temperature pressure fusion manufacturing method of composite pipe internally coated with stainless steel |
| CN117182243A (en) * | 2023-09-25 | 2023-12-08 | 中国科学技术大学 | Novel process for brazing micro-nano multilayer composite structure on inner wall of metal round tube |
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| JP2001219226A (en) * | 2000-02-04 | 2001-08-14 | Kawasaki Steel Corp | High-strength steel tube for hydroforming |
| CN1367050A (en) * | 2002-03-04 | 2002-09-04 | 大连铁道学院 | Production method of composite bimetal pipe |
| CN1618540A (en) * | 2003-11-20 | 2005-05-25 | 吉欣（英德）热轧不锈复合钢有限公司 | Method for making soldered hot-rolled composite metal tube |
| CN2749594Y (en) * | 2004-11-29 | 2006-01-04 | 方大集团股份有限公司 | Glass tube drawing machine used for metal multiple-unit tube processing |
| CN101701648A (en) * | 2009-11-03 | 2010-05-05 | 三门峡化工机械有限公司 | Method for machining hydraulic composite pipe |
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2015
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Patent Citations (5)
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| JP2001219226A (en) * | 2000-02-04 | 2001-08-14 | Kawasaki Steel Corp | High-strength steel tube for hydroforming |
| CN1367050A (en) * | 2002-03-04 | 2002-09-04 | 大连铁道学院 | Production method of composite bimetal pipe |
| CN1618540A (en) * | 2003-11-20 | 2005-05-25 | 吉欣（英德）热轧不锈复合钢有限公司 | Method for making soldered hot-rolled composite metal tube |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106078086A (en) * | 2016-06-12 | 2016-11-09 | 上海核工程研究设计院 | A kind of Reactor fuel element cladding zircaloy stainless steel composite pipe and preparation method thereof |
| CN106078086B (en) * | 2016-06-12 | 2020-11-10 | 上海核工程研究设计院 | Zirconium alloy stainless steel composite tube for nuclear fuel element cladding and preparation method thereof |
| CN107876617A (en) * | 2016-09-30 | 2018-04-06 | 比亚迪股份有限公司 | A kind of composite pipe and its manufacture method |
| CN110181228A (en) * | 2019-05-17 | 2019-08-30 | 东莞材料基因高等理工研究院 | A kind of manufacturing process of bimetallic mechanical composite-curve |
| CN110181228B (en) * | 2019-05-17 | 2021-02-02 | 东莞材料基因高等理工研究院 | Manufacturing process of bimetal mechanical composite bent pipe |
| CN113198869A (en) * | 2021-06-16 | 2021-08-03 | 山东胜利长龙管道科技有限公司 | High-temperature pressure fusion manufacturing method of composite pipe internally coated with stainless steel |
| CN117182243A (en) * | 2023-09-25 | 2023-12-08 | 中国科学技术大学 | Novel process for brazing micro-nano multilayer composite structure on inner wall of metal round tube |
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Address after: 243000 Anhui city of Ma'anshan province high tech Zone at 1669 North Road Huo sparkle Building No. 2 Applicant after: Anhui torch Technology Co., Ltd. Address before: The northern section of Cihu hi tech Zone Huo sparkle road in Ma'anshan City 1669 Building No. 2 Applicant before: Torch Science and Technology Ltd. of Maanshan City |
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