CN105904069A - Butt welding connecting method of laminar composite plate coated with LC2205 stainless steel up and down - Google Patents
Butt welding connecting method of laminar composite plate coated with LC2205 stainless steel up and down Download PDFInfo
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- CN105904069A CN105904069A CN201610362253.2A CN201610362253A CN105904069A CN 105904069 A CN105904069 A CN 105904069A CN 201610362253 A CN201610362253 A CN 201610362253A CN 105904069 A CN105904069 A CN 105904069A
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- stainless steel
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Classifications
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- 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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
-
- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
-
- 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
- B23K9/18—Submerged-arc welding
-
- 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
Abstract
The invention discloses a butt welding connecting method of a laminar composite plate coated with LC2205 stainless steel up and down. Two layers of LC2205 stainless steel and one layer of carbon steel are connected through a hot rolling process, and are rolled to the laminar composite plate by a controlled-rolling and controlled-cooling technology; the upper and lower two layers are LC2205 stainless steel alloy layers; the middle layer is a carbon steel layer; based on finish design and machining of a V+I+V special groove, the welding is performed by a sequence of the carbon steel layer, a transition layer and the LC2205 stainless steel layers, and the cladding thickness of the transition layer is controlled, so that the transition layer material achieves a transition compensation effect on corrosion resisting metal Cr and Ni, the excellent corrosion resistance of the upper and lower LC2205 stainless steel layers is guaranteed, and a welding line area is reliable in welding quality and excellent in comprehensive mechanical performance; and the butt welding connecting method is suitable for production and construction of various corrosion resistant pipes.
Description
Technical field:
The invention belongs to welding technology field, being specifically related to one, to be coated with LC2205 up and down stainless
Steel layer shape composite board to welding connection method.
Background technology:
The loss caused because of corrosion is on the rise, especially at some severe corrosive oil gas fields
In exploitation, the most aobvious seriously, owing to etching problem gives country and the direct economic loss that causes of society
Estimated, about 500,000,000,000 yuan annual, accounts for the 5% of gross national product, wherein because of pipeline
Accident and loss that corrosion causes also are increasing year by year.Laminar composite can make intensity, melt
The different metal of point, thermal expansion coefficient difference extremely great disparity realizes perfect metallurgical binding, and collection is not
With material advantage, give full play to dissimilar material properties, greatly save rare precious metal
Material, reduces the manufacturing cost of equipment, makes the rare precious metal application in many fields be possibly realized.
The lamellar composite pipe market demand is relatively big, and only China's oil, petrochemical industry are exactly a great market,
During China's oil and gas pipes is built, a part of steel pipe is i.e. used for transporting strong corrosive media, again in acid
Property soil environment in use, this for inside and outside layer be respectively provided with corrosion resistance lamellar composite weldering
Pipe, Bright Prospect is good.
The environment that pipeline or equipment are on active service, complicated imagines, such as to being difficult to: pipeline should transport
Strong corrosive media, passes through the acid soil environment of big territorial scope again.This is for general
For pipeline material, cannot use, it is necessary to obtain targetedly or constructive proposition one at all
The pipeline of anticorrosive function is had concurrently inside and outside kind, and the welding of this kind of pipeline, will be pipeline construction
Opera involving much singing and action, difficulty is well imagined, should ensure the corrosion resistance that inside and outside layer material is excellent,
Guarantee high-strength, the high tenacity feature of intermediate base layer material again, welding method, technique, include
Bevel design and processing are all different from other pipeline weldings significantly by being.Consideration is needed to weld
All many-sides of journey, and want the various problems that Coordination Treatment is likely to occur, including, welding parameter
Coupling, wlding mates, and welding wire, solder flux mate, bevel design and welding method and process matching
Etc..Therefore, the value of the present invention is that this.Can solve above-mentioned welding process very well may
The various problems occurred, and can guarantee that the excellent corrosion resistance of the inside and outside layer material of steel pipe, again can
Intermediate base layer material is made to give full play to its high-strength, high tenacity feature.
The Chinese invention that publication No. is CN 103537816 A that on January 29th, 2014 announces
Patent, patent name is the welding method of layered metal composite plate, and this patent of invention points out thickness
Layered metal composite plate 2.0～22.0mm opens I type groove；Thickness 22.0～42.0mm,
Do not include that the layered metal composite plate single or double of 22.0mm opens double V-groove, this groove
Design different from the present invention；The welding sequence of this patent of invention is first weldering I type groove, middle blunt
Limit, then weld double V-groove, but the thickness of weld layer is not carried out by this welding method
Control, according to this method rustless steel lamellar composite of cladding LC2205 up and down to the present invention
Sheet material carries out butt welding, interface can dissolve each other due to the factor such as Concentraton gradient, thermograde and
Anticorrosive element Cr, Ni can occur diffusive migration to carbon steel side, i.e. made by the dilution of carbon steel
With, easily make weld seam corrosion resistance weaken, have influence on the service life of pipeline.Plus corrosion resistant
Erosion alloy material layer and the Wuli-Shili-Renli system approach significant difference of middle carbon steel layer, so to welding
The control of process each layer cladding amount, welding parameter coupling, welding method and technique arrange to propose and choose
War.
Summary of the invention:
In order to overcome above-mentioned technical problem, it is an object of the invention to provide one and be coated with up and down
LC2205 rustless steel stratiform composite board to welding connection method, the butt welding connection side of the present invention
Method avoid corrosion resistant metal element Cr, Ni due to pyrometallurgy effect occur dilution problem,
Not only ensure the excellent corrosion-resistant spy of lamellar composite sheet material upper and lower LC2205 stainless steel layer
Property, and ensure that high-strength, the high tenacity characteristic of middle carbon steel layer, make weld seam have reliably
Welding quality and excellent comprehensive mechanical property.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is: one is wrapped up and down
Cover LC2205 rustless steel stratiform composite board to welding connection method, step is:
Step 1: two-layer LC2205 rustless steel and one layer of carbon steel are connected to by hot rolling technology
Together, then it is rolled into lamellar composite sheet material through control bundle, control refrigeration technique, lamellar composite sheet material
Upper and lower two-layer is LC2205 stainless steel alloy layer, and intermediate layer is carbon steel layer；Upper and lower LC2205
The thickness of stainless steel layer is 1～10mm, and the thickness of carbon steel layer is 8～50mm；Adjacent two
It it is metallurgical binding between Ceng；
Step 2: lamellar composite sheet material uses the design of " V+I+V " special type compound bevel, upper strata
The homonymy of LC2205 stainless steel alloy layer and lower floor LC2205 stainless steel alloy layer is " V "
Type groove, groove depth is 1～13mm, and the degree of depth is more than place LC2205 rustless steel thickness
Degree, groove angle is 80～100 °, and groove outer width is 10～25mm；Middle carbon steel layer
For " I " type groove, groove depth is middle carbon steel layer full-wall thickness；LC2205 stainless steel layer
" I " type groove of " V " type groove and middle carbon steel layer be intersected in middle carbon steel side；
Step 3: after completing retaining wall on slope, group to laminated composite plate from upper strata LC2205 not
The groove side of rust steel alloy layer carries out tack-weld every 500mm length, some postwelding group pair
0.5～1.0mm wide gap is had between lamellar composite sheet material groove；
Step 4: after completing tack-weld, welds middle carbon steel layer, forms carbon steel layer
Deposited metal district, in the groove of upper and lower LC2205 stainless steel layer and neighbouring district in welding process
Territory 10～20mm width scope carries out inert gas shielding；
Step 5: middle carbon steel layer complete welding after air cooling to room temperature, to upper and lower LC2205
" V " type groove of stainless steel layer carries out scarfing cinder process, polishes, polishes, make " V " after scarfing cinder
In the range of type groove minimum point is in the gauge of middle carbon steel layer, finally with acetone and ethanol
It is carried out and dries up rapidly；
Step 6: after " V " type groove dries up, uses TIG to weld respectively to upper and lower LC2205
Stainless steel layer carries out transition zone welding, and transition region thickness is put down with lamellar composite sheet material hot rolling composition surface
Neat or beyond 0～1.0mm, and carbon steel is completely covered；After transition zone welding, use TIG weldering
Upper and lower LC2205 stainless steel layer is filled with by method respectively, cover welding, forms LC2205
Stainless steel layer deposited metal district, the whole weld metal zone of welding process and near zone all use indifferent gas
Body is protected.
Above-mentioned upper strata LC2205 stainless steel layer is identical with the thickness of lower floor's LC2205 stainless steel layer
Or it is different.
Above-mentioned middle carbon steel layer is Q235, Q345, X52, X60, X65, X70, X80,
X90 or X100 carbon structural steels, pressure vessel steel and pipe line steel.
The method in above-mentioned steps 4 welded middle carbon steel layer is: when middle carbon steel layer is thick
Degree < during 15mm, uses PAW method to weld；As middle carbon steel layer thickness >=15mm
And during≤50mm, use SAW method to weld；Wlding used by welding is H08E,
Solder flux is SJ101G.
In above-mentioned steps 6, transition zone welding welding wire used isER309.
In above-mentioned steps 6, upper and lower stainless steel layer is filled with, welding wire used by cover welding isER2209.
Beneficial effects of the present invention:
The present invention use " V+I+V " special type compound bevel design, by groove depth,
The control of width, angle and angle, uses first carbon steel layer, transition zone, LC2205 rustless steel
The order of layer is welded, and is controlled transition zone deposition thickness, makes buffer layer material
Serve the transition compensating action to corrosion resistant metal Cr, Ni, make upper and lower two interfaces in weld seam
Place's corrosion resistant metal element is maintained at normal level, it is ensured that upper and lower LC2205 stainless steel layer
Superior anti-corrosion performance, also ensure that there is reliable welding quality and excellent comprehensive weld metal zone
Mechanical property.
Accompanying drawing illustrates:
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
Fig. 1 is the laminated composite plate of the present invention transition melting welding structural representation to welding line.
Description of reference numerals: 1 is upper strata LC2205 stainless steel layer；2 is middle carbon steel layer；3
For lower floor's LC2205 stainless steel layer；4 is LC2205 stainless steel layer deposited metal district；5 were
Cross layer；6 is carbon steel layer deposited metal district.
Detailed description of the invention:
See Fig. 1, be coated with up and down with LC2205/X65/LC2205 prepared by control bundle control refrigeration technique
LC2205 rustless steel stratiform composite board is experiment test plate (panel), in this example
LC2205/X65/LC2205 lamellar composite sheet material gross thickness is (3+15+3) mm=21mm, upper,
Lower two-layer LC2205 stainless steel layer thickness is 3mm, and middle X65 steel thickness is 15mm.
Use " V+I+V " i.e.Type special type compound bevel designs, upper and lower two-layer LC2205
Stainless steel layer bevel angle is 60～80 °, and the degree of depth is 3～5mm, and width is 10～14mm；
Middle X65 pipeline steel layer " I " type groove depth is 11～15mm.After retaining wall on slope to be done,
Group to a secondary LC2205/X65/LC2205 be coated with LC2205 rustless steel laminated composite plate up and down
Test plate (panel) carries out tack-weld from groove side, top every a length of anchor point of 500mm, protects
The test plate (panel) of card point postwelding has 0.5～1.0mm broad gap in the middle of groove.Then, basic unit X65
Steel uses SAW weldering, with BG-H08E welding wire and BG-SJ101G solder flux, forms X65 steel
Metal deposition district；After the welding completing middle X65 pipe line steel, to upper and lower two-layer LC2205
Stainless steel layer bevel for welding is cleared up, the welding slag of removal groove inner surface residual, pollutant etc.,
Then transition zone is carried outThe TIG weldering of ER309, finally carries out upper and lower LC2205
The TIG of stainless steel layer fills, cosmetic welding, forms LC2205 metal deposition district, and wlding usesER2209 welding wire.Major weld process parameters as shown in following table 1-2, this reality
Test LC2205/X65/LC2205 and be coated with LC2205 rustless steel stratiform composite board butt welding up and down
Weld Performance testing result such as table 3 below.
Table 1 middle X65 pipeline steel layer SAW soldering test parameter
Table 2 transition zone and LC2205 rustless steel anti-corrosive alloy material layer soldering test parameter
Table 3 butt welding Weld Performance testing result
Above content is that to combine concrete preferred implementation made for the present invention further in detail
Describe in detail bright, it is impossible to assert that the detailed description of the invention of the present invention is only limitted to this, for belonging to the present invention
For the those of ordinary skill of technical field, without departing from the inventive concept of the premise, make
Some simple deduction, replace or conversion etc. all should be considered as belonging to the right that the present invention is submitted to
Claim determines scope of patent protection.
Claims (6)
1. about be coated with LC2205 rustless steel stratiform composite board to a welding connection method,
It is characterized in that: described welding connection method is concretely comprised the following steps:
Step 1: two-layer LC2205 rustless steel and one layer of carbon steel are connected to by hot rolling technology
Together, then it is rolled into lamellar composite sheet material through control bundle, control refrigeration technique, lamellar composite sheet material
Upper and lower two-layer is LC2205 stainless steel layer (1,3), and intermediate layer is carbon steel layer (2)；Upper,
The thickness of lower LC2205 stainless steel layer (1,3) is 1～10mm, carbon steel layer (2)
Thickness is 8～50mm；It it is metallurgical binding between adjacent two layers；
Step 2: lamellar composite sheet material uses the design of " V+I+V " special type compound bevel, upper strata
LC2205's stainless steel alloy layer (1) and lower floor LC2205 stainless steel alloy layer (3) is same
Side is " V " type groove, and groove depth is 1～13mm, and the degree of depth is more than place LC2205
The thickness of stainless steel layer (1,3), groove angle is 80～100 °, and groove outer width is
10～25mm；Middle carbon steel layer (2) is " I " type groove, and groove depth is middle carbon steel
Layer (2) full-wall thickness；" V " groove of LC2205 stainless steel layer (1,3) and middle carbon
" I " type groove of steel layer (2) is intersected in middle carbon steel side；
Step 3: after completing retaining wall on slope, group to lamellar composite sheet material from upper strata LC2205
The groove side of stainless steel alloy layer (1) carries out tack-weld every 500mm length, puts postwelding
Group to lamellar composite sheet material groove between have 0.5～1.0mm wide gap；
Step 4: after completing tack-weld, welds middle carbon steel layer (2), is formed
Carbon steel layer deposited metal district (6), upper and lower LC2205 stainless steel layer (1,3) in welding process
Groove in and near zone 10～20mm width scope carry out inert gas shielding；
Step 5: middle carbon steel layer (2) complete all to weld after air cooling to room temperature, to upper,
" V " type groove of lower LC2205 stainless steel layer (1,3) carries out scarfing cinder process, after scarfing cinder
Polishing, polishing, make " V " type groove minimum point be in the thickness gauge of middle carbon steel layer (2)
In the range of very little, finally it be carried out with acetone and ethanol and dry up rapidly；
Step 6: after " V " type groove dries up, uses TIG to weld respectively to upper and lower LC2205
Stainless steel layer (1,3) carries out transition zone (5) welding, the thickness of transition zone (5) and stratiform
Composite board hot rolling composition surface is concordant or exceeds 0～1.0mm, and carbon steel is completely covered；Transition
Layer (5) welding after, use TIG soldering method respectively to upper and lower LC2205 stainless steel layer (1,
3) be filled with, cover welding, formed LC2205 stainless steel layer deposited metal district (4),
The whole weld metal zone of welding process and near zone all use inert gas shielding.
2. cladding LC2205 rustless steel stratiform composite board up and down as claimed in claim 1
To welding connection method, it is characterised in that: described upper strata LC2205 stainless steel layer (1) and
The thickness of lower floor's LC2205 stainless steel layer (3) is identical or different.
3. cladding LC2205 rustless steel stratiform composite board up and down as claimed in claim 1
To welding connection method, it is characterised in that: described middle carbon steel layer (2) is Q235, Q345,
X52, X60, X65, X70, X80, X90 or X100 carbon structural steels, pressure vessel
Steel and pipe line steel.
4. cladding LC2205 rustless steel stratiform composite board up and down as claimed in claim 1
To welding connection method, it is characterised in that: middle carbon steel layer (2) is entered by described step 4
The method of row welding is: when middle carbon steel layer (2) thickness < during 15mm, uses PAW side
Method is welded；As middle carbon steel layer (2) thickness >=15mm during≤50mm, use SAW
Method is welded；Wlding used by welding is H08E, and solder flux is SJ101G.
5. cladding LC2205 rustless steel stratiform composite board up and down as claimed in claim 1
To welding connection method, it is characterised in that: in described step 6, transition zone (5) welding is used
Welding wire isER309.
6. it is coated with LC2205 rustless steel stratiform composite board the most up and down
To welding connection method, it is characterised in that: upper and lower stainless steel layer (1,3) in described step 6
Be filled with, welding wire used by cover welding isER2209.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610362253.2A CN105904069B (en) | 2016-05-27 | 2016-05-27 | It is a kind of up and down cladding LC2205 stainless steel stratiform composite boards to welding connection method |
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| CN201610362253.2A CN105904069B (en) | 2016-05-27 | 2016-05-27 | It is a kind of up and down cladding LC2205 stainless steel stratiform composite boards to welding connection method |
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| CN108188549A (en) * | 2017-12-29 | 2018-06-22 | 洛阳隆华传热节能股份有限公司 | A kind of submerged-arc welding process of nickel-base alloy air cooler plug formula bobbin carriage |
| CN110773892A (en) * | 2019-11-05 | 2020-02-11 | 中国石油天然气集团有限公司 | Welding method of three-layer corrosion-resistant alloy composite plate |
| CN110919217A (en) * | 2019-10-23 | 2020-03-27 | 杭州盈铭深冷真空工程有限公司 | Vacuum container stainless steel composite plate and preparation method thereof |
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| CN110773892A (en) * | 2019-11-05 | 2020-02-11 | 中国石油天然气集团有限公司 | Welding method of three-layer corrosion-resistant alloy composite plate |
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Effective date of registration: 20181012 Address after: 100007 Dongzhimen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: Baoji Petroleum Steel Pipe Co., Ltd. Patentee after: China Petroleum and Natural Gas Group Co., Ltd. Address before: 721008 10 Jiang Tan Road, Weibin District, Baoji, Shaanxi. Patentee before: Baoji Petroleum Steel Pipe Co., Ltd. |
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