CN105945525A - Welding forming method of highly corrosion-resistant stainless steel composite tube - Google Patents
Welding forming method of highly corrosion-resistant stainless steel composite tube Download PDFInfo
- Publication number
- CN105945525A CN105945525A CN201610424850.3A CN201610424850A CN105945525A CN 105945525 A CN105945525 A CN 105945525A CN 201610424850 A CN201610424850 A CN 201610424850A CN 105945525 A CN105945525 A CN 105945525A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- welding
- welding rod
- steel composite
- clad plate
- 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
Links
Classifications
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- 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
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
-
- 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
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides a welding forming method of a highly corrosion-resistant stainless steel composite tube. The method comprises the following steps: (1) cutting a stainless steel composite plate into panels in required sizes; (2) symmetrically processing long sides of the panels of the stainless steel composite tubes into X-shaped grooves; (3) bending the stainless steel composite tubes into stainless steel composite tubes, wherein the outer diameter is a required diameter; (4) performing preweld cleaning; (5) performing electric-arc welding on a cladding metal by using a welding rod, wherein the welding rod is a stainless steel welding rod; (6) performing electric-arc welding on a base metal by using a welding rod, wherein the welding rod is a stainless steel welding rod or a carbon steel welding rod; and (7) grinding and straightening the welded stainless steel composite tubes. According to the method provided by the invention, various welding steps such as sealing, transition welding and overlay welding are reduced, the welding efficiency is extremely improved and the production cost is extremely lowered. Furthermore, the method is relatively simple, and a relatively strong metallurgical bonding interface prevents occurrence of delamination cracks.
Description
Technical field
The present invention relates to the welding tube-making technology of a kind of stainless steel clad plate, belong to welding technology field.
Background technology
Nowadays, along with high-sulfur coal charcoal, the exploitation of petroleum resources, and the popularization of oil gas high-pressure delivery technology, carbon steel piping is rotten
Erosion increasingly causes the attention of people, and more urgent to the tubing demand of high intensity high corrosion resistance performance, has the most researched and developed multiple side
Case prevents the fluid corrosion to pipeline, adds corrosion inhibiter the most in a fluid, is coated with, plates, oozes, serves as a contrast anticorrosion layer in pipeline,
And use corrosion resistant alloy or stainless steel tube.But, fancy price and environmental pollution are the main barriers hindering pipeline improvement to regenerate
Hinder.
Stainless steel composite pipe has given full play to the stainless feature such as high temperature resistant, anti-corrosion, has again the good solderability of carbon steel, one-tenth
Type, drawability, compared with pure rustless steel, the alloying element such as chromium, nickel 70%～80% can be saved, cost-effective 30%～50%,
It it is the material of following pipeline field most application potential.But, it is seamless stainless that current stainless steel composite pipe pipeline is used mostly liner
Steel pipe, uses metallic conduit detonation lining technology to prepare, i.e. makees blank, by certain gap with carbon steel pipe and stainless steel tube
It is assembled into bimetallic tube, then uses detonation lining technology, such as explosive welding, thermal expansion welding, thermal diffusion welding or thermal deformation method,
Producing stainless steel composite pipe, the interface cohesion that this method obtains is only mechanical bond or half metallurgical binding, by stainless steel tube and
The weak interface state formed between carbon steel pipe, conjugation and bond strength are relatively low, and delamination easily occurs, and can make follow-up rectifying
Directly, assemble, cut and machine-shaping, weld and be on active service during easily there is delamination crack, strong influence structural bearing
Ability and decay resistance.Simultaneously in the connection procedure of tube and tube, inevitably coating and basic unit interface are carried out soldering and sealing,
Add the most again soldering and sealing, transition weldering, cover the multinomial welding sequences such as weldering.
Summary of the invention
The purpose of the present invention is relatively low for conjugation present in current techniques and bond strength, delamination easily occurs, carries
For a kind of welding tube-making method of stainless steel composite pipe, the method mainly includes rolling into pipe and two processes of welding fabrication, wherein
Welding process can be respectively adopted two kinds of different welding methods and weld: first method is to select of the same race to coating and basic unit
Stainless steel electrode weld, second method be then first to coating use stainless steel electrode weld, after to basic unit use carbon steel weldering
Bar welds.The present invention welds employing twice weldering mode, decreases soldering and sealing, transition weldering, covers the multinomial welding sequences such as weldering, greatly
Improve welding efficiency and reduce production cost, and method is relatively simple, without Precision Machining groove, at bending tubulation and
During welding fabrication, stronger metallurgical bonding interface prevents the generation of delamination crack phenomenon.
The technical scheme is that
The welding shaping method of a kind of high corrosion resisting stainless steel multiple tube, comprises the steps:
(1) utilize lath cutter that stainless steel clad plate is cut into the sheet material of required size, wherein, covering of described stainless steel clad plate
Layer is rustless steel, and basic unit is carbon steel；
(2) " X " type groove that long for stainless steel clad plate sheet material limit symmetrical machining is angle 40 °～80 ° by grinding machine is utilized；
(3) set parameters of bent pipe, utilize two roller cold pilgered pipe machines stainless steel clad plate to be rolled repeatedly, by rustless steel
Composite plate bends to the stainless steel composite pipe that external diameter is required diameter；
(4) preweld cleaning: utilize emery wheel and acetone successively groove to be cleared up；
(5) coating metal welding rod is carried out electric arc welding；Described welding rod is stainless steel electrode；
(6) parent metal welding rod is carried out electric arc welding；The welding rod that this step uses is stainless steel electrode or carbon steel；
(7) stainless steel composite pipe being soldered is rolled aligning, obtain required high corrosion resisting stainless steel multiple tube.
In described stainless steel clad plate, thickness is than for coating: basic unit=1:4～5.
Described stainless steel clad plate is preferably 304 stainless steel clad plates, and parent metal is Q235 carbon steel, and stainless steel electrode is A302
Welding rod, carbon steel is J422 welding rod.
In described step (6) or (7), the optimum condition of SMAW is, core diameter is 1.5～5.0mm, welding
Electric current is 40～270A, and arc voltage is 16～25V, and speed of welding is 5～50cm/min.
The substantive distinguishing features of the present invention is:
The core innovative point of the present invention be the stainless steel composite pipe of the present invention be strong interfacial bond, i.e. metallurgical binding, relative to existing
Stainless steel composite pipe prepared by mechanical bond in technology and half metallurgical binding, is not susceptible to delamination, therefore butt welded seam quality
Requirement tight, in the case of ensureing that the mechanical performance of weld seam is higher than basic unit, it is allowed to have a small amount of pore, be mingled with, lack of penetration
Exist Deng weld defect.During bending tubulation and welding fabrication, it is not necessary to special welding equipment and welding method, use weldering
Bar arc welding can realize the welding of stainless steel composite pipe.Selection for welding rod has two kinds of methods, and first method is to coating
Selecting stainless steel electrode of the same race welding with basic unit, second method is then first to use stainless steel electrode to weld coating, rear right
Basic unit uses carbon steel welding.Wherein the chemical composition of stainless steel electrode is close to composition stainless in multiple tube, carbon steel
Composition close to the composition of multiple tube medium carbon steel, in the embodiment of the present invention, preparation is Q235/304 stainless steel composite pipe, therefore selects
Stainless steel electrode is A302 welding rod, and carbon steel is J422 welding rod.
The beneficial effects of the present invention is:
Basic unit and clad interface bond strength are high, improve welding efficiency, reduce production cost, and structural strength is high, and service life is long,
Improve corrosion resistance.The stainless steel clad plate interface bond strength prepared by Hot rolling is more than 300MPa, and it is combined into metallurgical junction
Closing, produce stainless steel composite pipe with it and be difficult to delamination, therefore the requirement of butt welded seam quality is not tight, in the mechanical performance ensureing weld seam
In the case of basic unit, it is allowed to the presence of a small amount of pore, be mingled with, the weld defect such as lack of penetration；Relative to mechanical bond and
Stainless steel composite pipe prepared by half metallurgical binding, during welding fabrication, it is not necessary to special welding equipment and welding method, fall
Low production cost, improves production efficiency；Owing to the Surface bond rate of stainless steel composite pipe is 100%, under arms during,
This stainless steel composite pipe can bear the alternate load of all directions, extends service life；Can be effectively ensured in bending, cutting
With welding process does not occur delamination, fully meet the requirement of resource equipment piping cost and performance.
Accompanying drawing explanation
Fig. 1 is the seam organization after embodiment 1 uses A302 welding rod welding fabrication；
Fig. 2 is the seam organization after embodiment 2 uses A302+J422 welding rod composite welding molding；
Fig. 3 is the stainless steel composite pipe after welding fabrication, and left and right two pipe represents the finished product preparation stream of embodiment 1 and embodiment 2 respectively
The finished product of journey 1 and 2；
Fig. 4 is the photo of the weld seam tension test of the employing embodiment 1 after stainless steel clad plate uses the docking of A302 welding rod to weld.
Detailed description of the invention
Embodiment 1
(1) utilize lath cutter that 304 stainless steel clad plates are cut into a length of 1000mm, the sheet material of a width of 1500mm, wherein coating
For rustless steel, thickness is 1mm, and basic unit is carbon steel, and thickness is 5mm, (thickness of coating and basic unit than for 1:5)；
(2) " X " type groove that long for stainless steel clad plate sheet material limit symmetrical machining is angle about 50 ° by grinding machine is utilized；
(3) set parameters of bent pipe, utilize two roller cold pilgered pipe machines stainless steel clad plate to be rolled repeatedly, by rustless steel
Composite plate bends to the stainless steel composite pipe that external diameter is 480mm；
(4) preweld cleaning, utilizes emery wheel and acetone successively by the thoroughly cleaning such as groove and the rust of both sides, oils and fats, dust, water,
Prevent impurity butt welded seam quality from producing unfavorable；
(5) coating metal being used A302 SMAW, by A302 welding rod drying before weldering, drying temperature is 200 DEG C, selects
Welding parameter be core diameter 2mm, welding current 50A, arc voltage 16V, speed of welding 20cm/min；
(6) parent metal (Q235 carbon steel) is used A302 SMAW, by A302 welding rod drying before weldering, dry temperature
Being 200 DEG C, the welding parameter of selection is core diameter 4mm, welding current 120A, arc voltage 20V, speed of welding 20cm/min；
(7) stainless steel composite pipe being soldered is rolled aligning；
(8) by coloring Non-Destructive Testing, welding defect exists.
When Fig. 1 and Fig. 2 illustrates to be respectively adopted stainless steel electrode and stainless steel electrode+carbon steel welding, there is not gas in weld seam
Hole, slag inclusion, incomplete fusion and the weld defect such as lack of penetration.Fig. 3 is the product of stainless steel composite pipe, indicates employing both welderings
The method of connecing can complete the welding of stainless steel composite pipe, and Fig. 4 is the stretching experiment of stainless steel composite pipe, and yield strength is about
340MPa, its fracture does not occur at welded seam area, illustrates that the mechanical property of welded seam area, higher than stainless steel clad plate, utilizes super
Sonic detection finds that stainless steel composite pipe interface does not has unconjugated region, illustrates that its combination rate is about 100%.Owing to 304 is stainless
Steel pitting potential in 3.5%NaCl solution is 312mV, and far above 200 series stainless steels, (201 stainless steel pitting potentials are
-32mV, 202 stainless steel pitting potentials are-22mV), 304 rustless steels corrosion rate in neutral salt fog environments is 0.0026mm/a,
Less than 200 series stainless steel corrosion rates, (201 Corrosion of Stainless Steel speed are 0.0071mm/a, and 202 Corrosion of Stainless Steel speed are
0.0062mm/a).Therefore, the stainless steel composite pipe that the present invention obtains has highly corrosion resistant.
Embodiment 2
(1) utilize lath cutter that 304 stainless steel clad plates are cut into a length of 1000mm, the sheet material of a width of 1500mm, wherein coating
For rustless steel, thickness is 1mm, and basic unit is carbon steel, and thickness is 5mm, (thickness of coating and basic unit than for 1:5)；
(2) " X " type groove that long for stainless steel clad plate sheet material limit symmetrical machining is angle about 50 ° by grinding machine is utilized；
(3) set parameters of bent pipe, utilize two roller cold pilgered pipe machines stainless steel clad plate to be rolled repeatedly, by rustless steel
Composite plate bends to the stainless steel composite pipe that external diameter is 480mm；
(4) preweld cleaning, utilizes emery wheel and acetone by the thoroughly cleaning such as groove and the rust of both sides, oils and fats, dust, water, prevents
Only the generation of impurity butt welded seam quality is unfavorable；
(5) coating metal being used A302 SMAW, by A302 welding rod drying before weldering, drying temperature is 200 DEG C, selects
Welding parameter be core diameter 2mm, welding current 50A, arc voltage 16V, speed of welding 20cm/min；
(6) parent metal (Q235 carbon steel) is used J422 SMAW, by J422 welding rod drying before weldering, dry temperature
Being 150 DEG C, the welding parameter of selection is core diameter 4.0mm, welding current 120A, arc voltage 20V, speed of welding
20cm/min；
(7) stainless steel composite pipe being soldered is rolled aligning；
(8) by coloring Non-Destructive Testing, welding defect exists.
Embodiment 3
Other steps with embodiment 1, difference be coating be rustless steel, thickness is 1mm, and basic unit is carbon steel, and thickness is 4mm, covers
The thickness of layer and basic unit ratio is for 1:4；
The stainless steel composite pipe of gained is with embodiment 1.
Embodiment 4
Other steps with embodiment 2, difference be coating be rustless steel, thickness is 1mm, and basic unit is carbon steel, and thickness is 4mm, covers
The thickness of layer and basic unit ratio is for 1:4；
The stainless steel composite pipe of gained is with embodiment 2.
Embodiment 5
Other steps are with embodiment 1, and difference is Q235/314 stainless steel clad plate；
The stainless steel composite pipe of gained is with embodiment 1.
Embodiment 6
Other steps are with embodiment 2, and difference is Q235/314 stainless steel clad plate；
The stainless steel composite pipe of gained is with embodiment 2.
Embodiment 7
Other steps are with embodiment 1, and difference is " X " type bevel angle about 60 ° of processing；
The stainless steel composite pipe of gained is with embodiment 1.
Embodiment 8
Other steps are with embodiment 2, and difference is " X " type bevel angle about 60 ° of processing；
The stainless steel composite pipe of gained is with embodiment 2.
Above example illustrates, no matter the present invention is to use A302 SMAW, or use A302+J422 SMAW,
Welding quality can be ensured, observe the most under an optical microscope the tissue of weld seam do not have obvious pore, lack of penetration, be mingled with
Defect exists.When butt welded seam region carries out stretching experiment test, fracture does not occur at position while welding, the mechanical property of weld seam is described
Can be higher than stainless steel composite pipe.In welding process, have employed twice weldering mode, decrease soldering and sealing, transition weldering, covering weldering etc. many
Item welding sequence, greatly improves welding efficiency and reduces production cost.
Unaccomplished matter of the present invention is known technology.
Claims (4)
1. a welding shaping method for high corrosion resisting stainless steel multiple tube, is characterized by comprise the steps:
(1) utilizing lath cutter that stainless steel clad plate is cut into the sheet material of required size, wherein, the coating of described stainless steel clad plate is rustless steel, and basic unit is carbon steel；
(2) utilizing grinding machine is angle 50 by long for stainless steel clad plate sheet material limit symmetrical machining o～80 o" X " type groove；
(3) set parameters of bent pipe, utilize two roller cold pilgered pipe machines that stainless steel clad plate is rolled repeatedly, stainless steel clad plate is bent to the stainless steel composite pipe that external diameter is required diameter；
(4) preweld cleaning: utilize emery wheel and acetone successively groove to be cleared up；
(5) coating metal welding rod is carried out electric arc welding；Described welding rod is stainless steel electrode；
(6) parent metal welding rod is carried out electric arc welding；The welding rod that this step uses is stainless steel electrode or carbon steel；
(7) stainless steel composite pipe being soldered is rolled aligning, obtain required high corrosion resisting stainless steel multiple tube.
The welding shaping method of high corrosion resisting stainless steel multiple tube the most as claimed in claim 1, is characterized by described stainless steel clad plate, and thickness is than for coating: basic unit=1:4～5.
The welding shaping method of high corrosion resisting stainless steel multiple tube the most as claimed in claim 1, is characterized by that described stainless steel clad plate is preferably 304 stainless steel clad plates, and parent metal is Q235 carbon steel, and stainless steel electrode is A302 welding rod, and carbon steel is J422 welding rod.
The welding shaping method of high corrosion resisting stainless steel multiple tube the most as claimed in claim 1, it is characterized by described step (6) or (7), the optimum condition of SMAW is, core diameter is 1.5～5.0mm, welding current is 40～270A, arc voltage is 16～25V, and speed of welding is 5～50cm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610424850.3A CN105945525A (en) | 2016-06-13 | 2016-06-13 | Welding forming method of highly corrosion-resistant stainless steel composite tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610424850.3A CN105945525A (en) | 2016-06-13 | 2016-06-13 | Welding forming method of highly corrosion-resistant stainless steel composite tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105945525A true CN105945525A (en) | 2016-09-21 |
Family
ID=56907237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610424850.3A Pending CN105945525A (en) | 2016-06-13 | 2016-06-13 | Welding forming method of highly corrosion-resistant stainless steel composite tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105945525A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108340129A (en) * | 2018-03-13 | 2018-07-31 | 太原科技大学 | A kind of preparation method of the stainless steel and carbon steel composite tube on the deposited side of easy welding |
| CN110026642A (en) * | 2019-04-10 | 2019-07-19 | 中广核研究院有限公司 | The butt welding method and double-sided composite plate interfacing part of double-sided composite plate |
| CN110076526A (en) * | 2019-05-10 | 2019-08-02 | 绿华投资有限公司 | A kind of composite steel tube manufacture technique of three layers of stainless steel and carbon steel |
| CN111673217A (en) * | 2020-05-11 | 2020-09-18 | 首钢集团有限公司 | Method for welding composite board on single surface by adopting ceramic liner |
| CN112008207A (en) * | 2020-07-22 | 2020-12-01 | 海洋石油工程（青岛）有限公司 | Structural pipe prefabricating method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2610770B2 (en) * | 1993-04-28 | 1997-05-14 | 株式会社島倉鉄工所 | High purity ferritic stainless steel welding method |
| CN101462193A (en) * | 2009-01-09 | 2009-06-24 | 中国石油天然气集团公司 | Method for welding thin layer iron nickel base alloy carbon steel composite tube |
| CN102101210A (en) * | 2011-02-25 | 2011-06-22 | 首钢总公司 | Welding method of high-strength steel for pressure steel pipe of 610MPa hydropower station |
| CN102632317A (en) * | 2012-04-23 | 2012-08-15 | 湖南华菱湘潭钢铁有限公司 | Shielded metal arc welding method for high-strength hardened and tempered steel |
| CN102889434A (en) * | 2012-10-24 | 2013-01-23 | 浙江金洲管道工业有限公司 | Stainless steel compound welding steel pipe and manufacturing method thereof |
-
2016
- 2016-06-13 CN CN201610424850.3A patent/CN105945525A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2610770B2 (en) * | 1993-04-28 | 1997-05-14 | 株式会社島倉鉄工所 | High purity ferritic stainless steel welding method |
| CN101462193A (en) * | 2009-01-09 | 2009-06-24 | 中国石油天然气集团公司 | Method for welding thin layer iron nickel base alloy carbon steel composite tube |
| CN102101210A (en) * | 2011-02-25 | 2011-06-22 | 首钢总公司 | Welding method of high-strength steel for pressure steel pipe of 610MPa hydropower station |
| CN102632317A (en) * | 2012-04-23 | 2012-08-15 | 湖南华菱湘潭钢铁有限公司 | Shielded metal arc welding method for high-strength hardened and tempered steel |
| CN102889434A (en) * | 2012-10-24 | 2013-01-23 | 浙江金洲管道工业有限公司 | Stainless steel compound welding steel pipe and manufacturing method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108340129A (en) * | 2018-03-13 | 2018-07-31 | 太原科技大学 | A kind of preparation method of the stainless steel and carbon steel composite tube on the deposited side of easy welding |
| CN110026642A (en) * | 2019-04-10 | 2019-07-19 | 中广核研究院有限公司 | The butt welding method and double-sided composite plate interfacing part of double-sided composite plate |
| CN110076526A (en) * | 2019-05-10 | 2019-08-02 | 绿华投资有限公司 | A kind of composite steel tube manufacture technique of three layers of stainless steel and carbon steel |
| CN111673217A (en) * | 2020-05-11 | 2020-09-18 | 首钢集团有限公司 | Method for welding composite board on single surface by adopting ceramic liner |
| CN112008207A (en) * | 2020-07-22 | 2020-12-01 | 海洋石油工程（青岛）有限公司 | Structural pipe prefabricating method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105945525A (en) | Welding forming method of highly corrosion-resistant stainless steel composite tube | |
| CN100450688C (en) | Thin-wall stainless steel double-layer and carbon steel base layer composite tube girth weld welding method | |
| CN102330034B (en) | X65MS steel-grade spiral welded tube for acidic corrosion environment and manufacturing method thereof | |
| CN101972878B (en) | Process for welding duplex stainless steel | |
| CN102179639B (en) | Cold metal transition fusion welding-soldering connection method for magnesium steel dissimilar metal | |
| CN102139418B (en) | Non-preheating strength gradient matched welding technology for low-alloy high-strength steel with yield strength of 800MPa | |
| CN101927390A (en) | Method for welding circumferential weld between metal thin-wall clad layer and base layer of clad pipe | |
| CN1267234C (en) | Welding method for ultra-thin composite layer low-carbon steel - austenitic stainless steel multiple tube adaptor | |
| JP6011743B1 (en) | Method for manufacturing circumferential welded joint of low carbon martensitic stainless steel pipe | |
| CN105478970B (en) | A kind of same steel grade welding procedure of weathering steel and its application | |
| CN101362249A (en) | Girth welding method of duplex stainless steel bimetal composite pipe | |
| CN104923927A (en) | Friction stir welding-braze welding composite welding method for dissimilar metal bonding structure | |
| CN103061333A (en) | Split screw pile and welding method thereof | |
| CN110000517B (en) | Marine high-strain welded steel pipe based on dual-phase structure and preparation method thereof | |
| CN103350320A (en) | Production method of corrosion-resistant bimetal composite pipe | |
| CN105921545A (en) | Manufacturing method of pure titanium or titanium alloy/carbon steel laminar composite welded pipe | |
| CN110773891A (en) | Welding method of stainless steel composite plate | |
| CN107900494A (en) | A kind of S32750 super-duplex stainless steels flat cold-rolled sheet self-melting and welding method | |
| CN102330032B (en) | Acid-proof X70MS steel-grade spiral welded pipe and manufacturing method thereof | |
| Oh et al. | Mechanical performance and microstructure of resistance element welds of dissimilar metals created with a headless rivet | |
| CN107150174B (en) | The method for improving coating and base's bond strength in mechanical bond type composite bimetal pipe | |
| JP3543740B2 (en) | Martensitic stainless steel welded steel pipe | |
| CN109623104A (en) | A kind of T91 panelized-tube-wall section scene counterpart mounting process method | |
| CN103341682A (en) | Welding process for SAF2205 duplex stainless steel and WELDOX 700 low alloy high-strength steel | |
| CN110904384A (en) | Q345NS spiral submerged arc welded pipe for resisting sulfuric acid dew point corrosion and manufacturing process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160921 |