CN103752987A - Welding method of stainless steel plates - Google Patents
Welding method of stainless steel plates Download PDFInfo
- Publication number
- CN103752987A CN103752987A CN201310747172.0A CN201310747172A CN103752987A CN 103752987 A CN103752987 A CN 103752987A CN 201310747172 A CN201310747172 A CN 201310747172A CN 103752987 A CN103752987 A CN 103752987A
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- Prior art keywords
- welding
- corrosion resistant
- resistant plate
- welding method
- stainless steel
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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
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
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 pressing blocks, 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 a method of breaking arc and stopping arc repeatedly. 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 316L 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 this device is after operation a period of time; because corrosive environment is very severe; the complexity of system environments is had relatively high expectations to the corrosion resistance of the material of device; 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.When carrying out soldering, if the wlding of selecting does not mate with mother metal defects such as just there will be pore, undercut, in addition, if welding method is improper, also can cause the defects such as distortion, cold crack and slag inclusion, along with long use, acid medium can slowly penetrate into pore or bead crack is inner, groove corrosion degree is increased the weight of, so welding quality guarantee that difficulty is larger.
By patent retrieval, find that the method for current soldering stainless steel thin plate has stick electrode electric arc process, tungsten argon arc welding method etc., be mainly effectively to control 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, with briquetting, corrosion resistant plate is closely attached 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 all 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 repeatedly to receive arc method and receive arc.
According to one embodiment of present invention, lap joint and edge joint are being positioned in welding, tack weld length is 10mm, and tack welding spacing is 80mm～100mm.
According to one embodiment of present invention, lap joint and edge joint are being adopted during wandering sequence welds, every section of fusion length is 50mm～100mm.
According to one embodiment of present invention, in the to-be-welded region of corrosion resistant plate is cleaned, clean scope is the 20mm～30mm from commissure.
According to one embodiment of present invention, the lap width of lap joint is 30mm.
According to one embodiment of present invention, described welding method also comprises every section of weld seam after welding is carried out to water-cooled.
According to one embodiment of present invention, below water-cooled to 60 ℃.
According to one embodiment of present invention, the weld seam after every section of welding is carried out to water-cooled and refer to: after every section of weld seam has welded, with wet cloth, be covered in face of weld, to force to carry out water-cooled.
According to one embodiment of present invention, current interruption receipts arc method refers to repeatedly: under the protection of argon gas, along molten bath front end, welding wire is sent into behind molten bath, and current interruption continuously, striking 2～3 times, butt welded seam is received arc.
According to one embodiment of present invention, corrosion resistant plate is 316L stainless steel.
According to the welding method of corrosion resistant plate of the present invention, when soldering stainless steel plate, take steel pipe inner surface 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; Can guarantee chemical industry flue gas desulfur device plate sheet welding quality according with process requirements, strengthen the corrosion resisting property in acid medium, improve service life of equipment, shorten the site examining and repairing cycle simultaneously.Be specially adapted to the site examining and repairing welding operation 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 cutaway view illustrating according to the lap joint in the welding method of corrosion resistant plate of the present invention;
Fig. 2 is the welding location schematic diagram illustrating according in the welding method of corrosion resistant plate of the present invention;
Fig. 3 is the figure illustrating according to the 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 welding method that the object of this invention is to provide a kind 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 cutaway view illustrating according to the lap joint in the welding method of corrosion resistant plate of the present invention.Fig. 2 is the welding location schematic diagram illustrating according in the welding method of corrosion resistant plate of the present invention.Fig. 3 is the figure illustrating according to the 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 being carried out in clean step, the greasy dirt with the removing of stainless steel wire brush within the scope of the 20mm～30mm of commissure, water, rust foreign material etc. are carried out the removing of foreign material.In addition, in the present invention, preferably, corrosion resistant plate is 316L stainless steel.Meanwhile, in the present invention, preferably, the thickness of corrosion resistant plate can be 2mm.
In the step being grouping between the corrosion resistant plate to after clean, with briquetting 3, corrosion resistant plate 1 is closely attached 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 simultaneously, and the junction between corrosion resistant plate 1 (for example, as shown in Fig. 2 and Fig. 5 A, can be the junction between at least two corrosion resistant plates 11,12) all adopt the mode of lap joint to be grouping, to control the distortion of corrosion resistant plate and to reduce back side oxidation.In the exemplary embodiment, two corrosion resistant plates 11,12 are provided, in order two corrosion resistant plates 11,12 to be closely attached on the inner surface of steel pipe and to be convenient to the lap joint of two corrosion resistant plates to weld, briquetting 3 can be all set above corrosion resistant plate at two, to give the downward pressure of corrosion resistant plate, but the present invention is not limited to this.As an example of the present invention, can corrosion resistant plate be closely pressed on steel pipe internal-surface on the weld seam side both sides of corrosion resistant plate external upset (EU) steel plate (that is, briquetting 3), make corrosion resistant plate be close to steel pipeline inner surface, the air of discharging the corrosion resistant plate back side, prevents welding deformation.In addition, in the present invention, preferably, lap width c is 30mm.
To group to after the lap joint of the corrosion resistant plate step of welding in, first position welding, tack weld length a can be 10mm, and tack welding spacing b can be 80mm～100mm(more preferably, tack welding spacing b can be 100mm), and then adopt wandering sequence to weld.In addition, in wandering sequence of the present invention, every section of weld seam is taked to be interrupted skip welding, and every section of weld seam e length can be 50mm～100mm(more preferably, and every section of weld seam e length can be 100mm).In addition, welding gun operation adopts the non-oscillatory mode of straight line to weld.Meanwhile, according to the present invention, preferably, when welding between at least two corrosion resistant plates, the side-play amount d between each corrosion resistant plate is about 30mm.In 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.
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 corrosion resistant plate edge 111, the corrosion resistant plate edge 112 contacting with the end, two ends of steel pipe 2) with the end of steel pipe 2 between adopt the mode of edge joint to be connected.Then, edge joint is positioned to welding, with fixing welding position.Finally, then adopt wandering sequence to weld.In the present invention, preferably, tack weld length a is 10mm, tack welding spacing b can be 80mm～100mm(more preferably, and tack welding spacing b can be 100mm), in addition, in wandering sequence of the present invention, be that every section of weld seam is taked to be interrupted skip welding, and every section of weld seam e length can be 50mm～100mm(more preferably, every section of weld seam e length can be 100mm).
Every section of weld seam is being received in the step of arc, with linear pattern, used the mode butt welded seam of welding gun to adopt current interruption repeatedly to receive arc method and receive arc.Particularly, under the protection of argon gas, along molten bath front end, welding wire is sent into behind molten bath, current interruption continuously, striking 2～3 times, butt welded seam is received arc, to avoid face of weld to produce shrinkage cavity.
At every section of weld seam e to after welding, carry out in the step of water-cooled, preferably, after every section of weld seam has welded, with wet cloth, be covered in face of weld, force to carry out water-cooled, be 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 chemical industry flue gas desulfur device corrosion resistant plate welding quality 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, with briquetting, corrosion resistant plate is closely attached 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 all 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 repeatedly to receive arc method and receive arc.
2. welding method according to claim 1, wherein, is positioning in welding lap joint and edge joint, and tack weld length is 10mm, and tack welding spacing is 80mm～100mm.
3. welding method according to claim 1, wherein, is adopting lap joint and edge joint during wandering sequence welds, and every section of fusion length is 50mm～100mm.
4. welding method according to claim 1, wherein, in the to-be-welded region of corrosion resistant plate is cleaned, clean scope is from commissure 20mm～30mm.
5. welding method according to claim 1, wherein, the lap width of lap joint is 30mm.
6. welding method according to claim 1, described welding method also comprises carries out water-cooled to the weld seam after every section of welding.
7. welding method according to claim 6, wherein, below water-cooled to 60 ℃.
8. welding method according to claim 5, wherein, carries out water-cooled to the weld seam after every section of welding and refers to: after every section of weld seam has welded, with wet cloth, be covered in face of weld, to force to carry out water-cooled.
9. welding method according to claim 1, wherein, current interruption is received arc method and is referred to repeatedly: under the protection of argon gas, along molten bath front end, welding wire is sent into behind molten bath, current interruption continuously, striking 2～3 times, butt welded seam is received arc.
10. welding method according to claim 1, wherein, described corrosion resistant plate is 316L stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747172.0A CN103752987B (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 |
|---|---|---|---|
| CN201310747172.0A CN103752987B (en) | 2013-12-30 | 2013-12-30 | The welding method of corrosion resistant plate |
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| CN103752987A true CN103752987A (en) | 2014-04-30 |
| CN103752987B CN103752987B (en) | 2015-09-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106891082A (en) * | 2016-12-23 | 2017-06-27 | 中国核工业二三建设有限公司 | Stainless steel plate welding method under radiation environment |
| CN109079290A (en) * | 2018-10-17 | 2018-12-25 | 滁州岳众汽车零部件有限公司 | A kind of welding method for the production of wheel stopper |
| 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 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106891082A (en) * | 2016-12-23 | 2017-06-27 | 中国核工业二三建设有限公司 | Stainless steel plate welding method under radiation environment |
| CN109079290A (en) * | 2018-10-17 | 2018-12-25 | 滁州岳众汽车零部件有限公司 | A kind of welding method for the production of wheel stopper |
| 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 |
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| CN103752987B (en) | 2015-09-16 |
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