CN103752988A - Welding method of stainless steel plates - Google Patents
Welding method of stainless steel plates Download PDFInfo
- Publication number
- CN103752988A CN103752988A CN201310747192.8A CN201310747192A CN103752988A CN 103752988 A CN103752988 A CN 103752988A CN 201310747192 A CN201310747192 A CN 201310747192A CN 103752988 A CN103752988 A CN 103752988A
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- Prior art keywords
- welding
- corrosion resistant
- resistant plate
- welding method
- arc
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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
- B23K9/00—Arc welding or cutting
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0531—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor internal pipe alignment clamps
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/025—Seam welding; Backing means; Inserts for rectilinear 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
-
- 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
- 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 welding method of stainless steel plates. The method comprises the steps of cleaning areas, to be welded, of stainless steel plates; pairing the cleaned stainless steel plates, adhering the stainless steel plates to the inner surface of a steel pipe by using annular support tools, coiling the stainless steel plates along with the inner surface of the steel pipe to form a lining, pairing junctions among the stainless steel plates by using overlapping joints; positioning and welding the overlapping joints of the paired stainless steel plates, and then welding by using a skip welding process; connecting edges of the stainless steel plates which are formed as the lining on the inner surface of the steel pipe to the end of the steel pipe by using edge joints, and positioning and welding the edge joints, and then welding by using the skip welding process; and stopping arc of each section of welding line, and stopping arc by using a method of breaking arc and stopping arc. The method is simple to operate and capable of ensuring that the welding quality of the stainless steel plates of flue gas desulphurization devices in chemical industry, improving corrosion resistance in acid medium and prolonging service life of equipment.
Description
Technical field
The present invention relates to a kind of welding method of corrosion resistant plate, particularly a kind of welding method of 254SMo corrosion resistant plate.
Background technology
In flue gas desulfur device, adopt the desulfur technology desulfuration efficiency of " ionic liquid " circulation absorption flue gas higher; but after this device operation a period of time; because corrosive environment is very severe; the complexity of system environments requires also high to the corrosion resistance of device material; wherein one of main material is 316L stainless steel; although this material has very strong antiseptic property; but for a long time in sour environment; be subject to the impact of high temperature; its surface can form field trash; make stainless steel watch surface protective film destroyed, and then form the leakage phenomenons such as local perforations, sand holes.In addition, when carrying out soldering, if the wlding of selecting does not mate with mother metal defects such as just there will be pore, undercut, meanwhile, if welding method is improper, also can cause the defects such as distortion, cold crack and slag inclusion, along with long-term use, acid medium can slowly penetrate into the inside of pore or bead crack, has increased the weight of groove corrosion degree, and therefore welding quality guarantees that difficulty is larger.
254SMo corrosion resistant plate is the austenitic stainless steel of a kind of high strength, high tenacity, and this stainless corrosion resistant plate, as liner plate, invests on carbon steel base material pipeline, by welding, forms integral lining, in equipment operation work, can effectively play the effect of acid-resisting dielectric corrosion.But, if welding procedure measure is incorrect, produces wave transformation, organize thick, component segregation, cause degradation under decay resistance, cannot reach designing requirement.
In the prior art, the welding method that corrosion resistant plate is welded on steel pipe has stick electrode electric arc process, tungsten argon arc welding method etc., and mostly document is to control effectively for the quality in fixing processing place.And for note lining member, there is no associated welds operation control technology at the construction field (site).
Summary of the invention
For the above-mentioned problems in the prior art, the object of the present invention is to provide a kind of welding method of corrosion resistant plate.
According to an aspect of the present invention, provide a kind of welding method of corrosion resistant plate, described welding method comprises the steps: the to-be-welded region of corrosion resistant plate to clean; To being grouping between the corrosion resistant plate after clean, by annular, supportting tool is closely attached on corrosion resistant plate on the inner surface of steel pipe, so that corrosion resistant plate carries out around the inner surface of steel pipe is curling to form liner, and the junction between corrosion resistant plate adopts the mode of lap joint to be grouping; To group to after the lap joint of corrosion resistant plate position welding, and then adopt wandering sequence to weld; To group to after complete the edge of corrosion resistant plate of welding and the end of steel pipe adopts the mode of edge joint to be connected, and edge joint is positioned to welding, and then adopts wandering sequence to weld; Every section of weld seam is received to arc, adopt current interruption to receive arc method and receive arc.
According to one embodiment of present invention, lap joint and edge joint are positioned in welding, tack weld length is 10mm, and tack welding spacing is 80mm～100mm.
According to one embodiment of present invention, in the to-be-welded region of corrosion resistant plate is cleaned, clean scope is the 30mm～50mm from commissure.
According to one embodiment of present invention, lap joint and edge joint being adopted during wandering sequence welds, every section of fusion length is 50mm～100mm.
According to one embodiment of present invention, it is in the situation that not adding welding wire that arc method is received in current interruption, the interrupted striking 3 times at arc crater place.
According to one embodiment of present invention, lap width is 30mm.
According to one embodiment of present invention, described welding method also comprises that every section of weld seam to receiving after arc carries out water-cooled.
According to one embodiment of present invention, below water-cooled to 60 ℃.
According to one embodiment of present invention, the material of corrosion resistant plate is 254SMo.
According to one embodiment of present invention, described annular support tool comprises: the first support component, for being supported on the corrosion resistant plate of the inner surface of being close to steel pipe; Arc pressure frame, for being close on the inner surface of steel pipe corrosion resistant plate; And be fixed on the jack between the first support component and arc pressure frame; Wherein, arc pressure frame comprises the top board that is connected with jack, makes corrosion resistant plate be closely attached on curved plate on the inner surface of steel pipe and the second support component of roof supporting and base plate.
According to the welding method of corrosion resistant plate of the present invention, when soldering stainless steel plate, take the inner surface of steel pipe as welding table top, in the gas shield of saving the corrosion resistant plate back side, can also guarantee the oxidation at the back side of corrosion resistant plate, thereby make welding method flexible, do not need fixing welding place; This welding method is simple to operate simultaneously, can guarantee that in chemical industry flue gas desulfur device, corrosion resistant plate welding quality meets technological requirement, has strengthened the corrosion resisting property in acid medium, has improved service life of equipment, shortens the site examining and repairing cycle; And weld while being applicable to the site examining and repairing of the mordant acidity of chemical industry or Neutral Chloride compound, sulfide solution member.
Accompanying drawing explanation
By the description to embodiment of carrying out below in conjunction with accompanying drawing, above-mentioned and/or other object of the present invention and advantage will become apparent, wherein:
Fig. 1 is the welding schematic diagram while illustrating according to welding in the welding method of corrosion resistant plate of the present invention;
Fig. 2 A is the structural representation illustrating according to the annular support tool in the welding method of corrosion resistant plate of the present invention;
Fig. 2 B is the structural representation illustrating according to the arc pressure frame in annular support tool in the welding method of corrosion resistant plate of the present invention;
Fig. 3 is the figure illustrating according to the interruption skip welding mode in the welding method of corrosion resistant plate of the present invention;
Fig. 4 is the structural representation illustrating according to the edge of the corrosion resistant plate being connected with steel pipe in the welding method of corrosion resistant plate of the present invention;
Fig. 5 A is the structural representation illustrating according to the end of the steel pipe after corrosion resistant plate and steel-pipe welding in the welding method of corrosion resistant plate of the present invention;
Fig. 5 B is the side partial cross-sectional illustrating according to the I-I shown in Fig. 5 A.
The specific embodiment
Below the welding method of corrosion resistant plate of the present invention is described in detail.
The object of this invention is to provide a kind of welding method of corrosion resistant plate.This welding method is simple to operate, while being suitable for site examining and repairing, welds.
According to the welding method of corrosion resistant plate of the present invention, the method comprises: the to-be-welded region of corrosion resistant plate is carried out to clean step; To the step being grouping between the corrosion resistant plate after clean; To group to after the lap joint of the corrosion resistant plate step of welding; To group to after complete the step that the edge of corrosion resistant plate of welding and the edge joint of the end of steel pipe are welded; Every section of weld seam is received to the step of arc; Every section of weld seam after receipts arc is carried out to the step of water-cooled.
Below with reference to Fig. 1 to Fig. 5, describe the welding method of corrosion resistant plate of the present invention in detail.
Fig. 1 is the welding schematic diagram while illustrating according to welding in the welding method of corrosion resistant plate of the present invention.Fig. 2 A is the structural representation illustrating according to the annular support tool in the welding method of corrosion resistant plate of the present invention.Fig. 2 B is the structural representation illustrating according to the arc pressure frame in annular support tool in the welding method of corrosion resistant plate of the present invention.Fig. 3 is the figure illustrating according to the interruption skip welding mode in the welding method of corrosion resistant plate of the present invention.Fig. 4 is the structural representation illustrating according to the edge of the corrosion resistant plate being connected with steel pipe in the welding method of corrosion resistant plate of the present invention.Fig. 5 A is the structural representation illustrating according to the end of the steel pipe after corrosion resistant plate and steel-pipe welding in the welding method of corrosion resistant plate of the present invention.Fig. 5 B is the side partial cross-sectional illustrating according to the I-I shown in Fig. 5 A.
Specifically, the to-be-welded region of corrosion resistant plate 1 is carried out in clean step, with the greasy dirt within the scope of the 30mm～50mm of stainless steel wire brush removing commissure, water, rust foreign material etc., carry out the removing of foreign material.In addition, in the present invention, preferably, described corrosion resistant plate is 254SMo stainless steel.The corrosion resistant plate of this material can play the effect of acid-resisting dielectric corrosion.In addition,, in method of the present invention, preferably, the thickness of corrosion resistant plate can be 1.0～2.0mm.
In the step being grouping between the corrosion resistant plate to after clean, by annular, supportting tool 3 is closely attached on corrosion resistant plate 1 on the inner surface of steel pipe 2, corrosion resistant plate 1 carries out curling to form liner around the inner surface of steel pipe 2, and the junction between corrosion resistant plate 1 (for example, as shown in Figure 5 A, can be the junction between corrosion resistant plate 11 and corrosion resistant plate 12) adopt the mode of lap joint to be grouping.By above-mentioned, on the inner surface of steel pipe 2, corrosion resistant plate 1 welded to form liner and can effectively control the distortion of corrosion resistant plate and reduce the oxidation at the back side of corrosion resistant plate.Preferably, lap width is 30mm., it is pointed out that in the present invention, as shown in Fig. 2 A and Fig. 2 B, annular support tool 3 can comprise meanwhile: the first support component 31, for being supported on the corrosion resistant plate 1 of the inner surface of being close to steel pipe 2; Arc pressure frame 33; For making corrosion resistant plate 1, be close on the inner surface of steel pipe 2; Be fixed on the jack 32 between the first support component 31 and arc pressure frame 33.The first support component 31, jack 32 and arc pressure frame 33 can connect by the mode of welding.Wherein, in annular support tool, the first support component 31 can be stay pipe, and jack 32 can be selected the jack of suitable lifting capacity, for example, in the present invention, selects 3 tons of jack.In addition, in annular support tool, arc pressure frame 33 can comprise the top board 33a that is connected with jack 32, make corrosion resistant plate 1 be closely attached on curved plate 33b on the inner surface of steel pipe 2 and the second support component 33c of roof supporting 33a and base plate 33b, meanwhile, the radian of curved plate 33b can be determined according to the diameter of steel pipe.But the annular support tool in the present invention is not limited to this, as long as meeting, corrosion resistant plate is closely attached on the inner surface of steel pipe.
To group to after the lap joint of the corrosion resistant plate step of welding in, first position welding, and then adopt wandering sequence to weld (with reference to Fig. 3).In the present invention, preferably, tack weld length is 10mm, and tack welding spacing is 80mm～100mm, in addition,, in wandering sequence of the present invention, every section of weld seam takes to be interrupted skip welding, and every section of weld seam C length is 50mm～100mm, more preferably, every section of fusion length is 50mm.In addition, welding gun operation adopts the non-oscillatory mode of straight line to weld.In the present invention, corrosion resistant plate is welded on the inner surface of steel pipe, make the back side undesirable gas protection of corrosion resistant plate, make welding method flexible, do not need fixing welding place.
To group to after complete in the step that the edge of corrosion resistant plate of welding and the edge joint of the end of steel pipe weld, first, need to group to after complete welding corrosion resistant plate edge (for example, as shown in Fig. 4 and Fig. 5 B, the edge of corrosion resistant plate comprises the corrosion resistant plate edge 111, the corrosion resistant plate edge 112 that contact with the end, two ends of steel pipe 2) and the end of steel pipe 2 between adopt the mode of edge joint to be connected.Then, edge joint is positioned to welding, to fix welding position.Finally, then adopt wandering sequence to weld.In the present invention, preferably, tack weld length is 10mm, and tack welding spacing is 80mm～100mm, in addition,, in wandering sequence of the present invention, every section of weld seam takes to be interrupted skip welding, and every section of weld seam C length is 50mm～100mm, more preferably, every section of fusion length is 50mm.
Every section of weld seam being received in the step of arc, adopt current interruption to receive arc method and receive arc.Particularly, it is in the situation that not adding welding wire that arc method is received in current interruption, the interrupted striking 3 times at arc crater place.Adopt this receipts arc method generation of less crater crack effectively.
Every section of weld seam receiving after arc is carried out in the step of water-cooled, preferably, after every section of weld seam weld, be covered in face of weld with wet cloth, water-cooled is carried out in pressure, is cooled to below 60 ℃.
Above-mentioned welding method of the present invention, simple to operate, be applicable to applying in acid medium environment, anti intercrystalline corrosion ability is strong, is out of shape littlely, and speed of welding is fast, can guarantee that the stainless corrosion resistant plate welding quality of chemical industry flue gas desulfur device meets technological requirement, strengthen the corrosion resisting property in acid medium, improved the service life of equipment, shortened the site examining and repairing cycle; And weld while being specially adapted to the site examining and repairing of the mordant acidity of chemical industry or Neutral Chloride compound, sulfide solution member.
More than describe the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant and combination to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Claims (10)
1. the welding method of corrosion resistant plate, described welding method comprises the steps:
To-be-welded region to corrosion resistant plate cleans;
To being grouping between the corrosion resistant plate after clean, by annular, supportting tool is closely attached on corrosion resistant plate on the inner surface of steel pipe, so that corrosion resistant plate carries out around the inner surface of steel pipe is curling to form liner, and the junction between corrosion resistant plate adopts the mode of lap joint to be grouping;
To group to after the lap joint of corrosion resistant plate position welding, and then adopt wandering sequence to weld;
To group to after complete the edge of corrosion resistant plate of welding and the end of steel pipe adopts the mode of edge joint to be connected, and edge joint is positioned to welding, and then adopts wandering sequence to weld;
Every section of weld seam is received to arc, adopt current interruption to receive arc method and receive arc.
2. welding method according to claim 1, wherein, lap joint and edge joint are positioned in welding, tack weld length is 10mm, tack welding spacing is 80mm～100mm.
3. welding method according to claim 1, wherein, in the to-be-welded region of corrosion resistant plate is cleaned, clean scope is the 30mm～50mm from commissure.
4. welding method according to claim 1, wherein, lap joint and edge joint being adopted during wandering sequence welds, every section of fusion length is 50mm～100mm.
5. welding method according to claim 1, wherein, it is in the situation that not adding welding wire that arc method is received in current interruption, the interrupted striking 3 times at arc crater place.
6. welding method according to claim 1, wherein, the lap width of lap joint is 30mm.
7. welding method according to claim 1, described welding method also comprises that every section of weld seam to receiving after arc carries out water-cooled.
8. welding method according to claim 7, wherein, below water-cooled to 60 ℃.
9. welding method according to claim 1, wherein, described corrosion resistant plate is 254SMo stainless steel.
10. welding method according to claim 1, wherein, described annular support tool comprises: the first support component, for being supported on the corrosion resistant plate of the inner surface of being close to steel pipe; Arc pressure frame, for being close on the inner surface of steel pipe corrosion resistant plate; And be fixed on the jack between the first support component and arc pressure frame; Wherein, arc pressure frame comprises the top board that is connected with jack, makes corrosion resistant plate be closely attached on curved plate on the inner surface of steel pipe and the second support component of roof supporting and base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747192.8A CN103752988B (en) | 2013-12-30 | 2013-12-30 | The welding method of corrosion resistant plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310747192.8A CN103752988B (en) | 2013-12-30 | 2013-12-30 | The welding method of corrosion resistant plate |
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| CN103752988A true CN103752988A (en) | 2014-04-30 |
| CN103752988B CN103752988B (en) | 2015-09-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104229060A (en) * | 2014-10-08 | 2014-12-24 | 南通润邦海洋工程装备有限公司 | Construction technology for low-flash liquid cabin of platform supply vessel (PSV) |
| CN105522303A (en) * | 2016-01-10 | 2016-04-27 | 大连金州重型机器集团有限公司 | Drum liner fitting-up device and using method thereof |
| CN109551079A (en) * | 2018-12-29 | 2019-04-02 | 郑州煤机综机设备有限公司 | The outer numerical control fine cold compress special welding machine of cylinder body |
| CN113510433A (en) * | 2021-04-16 | 2021-10-19 | 睿信泰智能科技(昆山)有限公司 | Combined type core expanding tooling |
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Cited By (7)
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| CN105522303A (en) * | 2016-01-10 | 2016-04-27 | 大连金州重型机器集团有限公司 | Drum liner fitting-up device and using method thereof |
| CN109551079A (en) * | 2018-12-29 | 2019-04-02 | 郑州煤机综机设备有限公司 | The outer numerical control fine cold compress special welding machine of cylinder body |
| CN109551079B (en) * | 2018-12-29 | 2023-09-01 | 郑州煤机综机设备有限公司 | Special numerically-controlled fine cold compress welding machine outside cylinder body |
| CN113510433A (en) * | 2021-04-16 | 2021-10-19 | 睿信泰智能科技(昆山)有限公司 | Combined type core expanding tooling |
| CN113510433B (en) * | 2021-04-16 | 2022-08-09 | 睿信泰智能科技(昆山)有限公司 | Combined type core expanding tooling |
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| CN103752988B (en) | 2015-09-16 |
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