CN202868099U - Stainless steel hybrid welding steel tube - Google Patents

Stainless steel hybrid welding steel tube Download PDF

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Publication number
CN202868099U
CN202868099U CN 201220546610 CN201220546610U CN202868099U CN 202868099 U CN202868099 U CN 202868099U CN 201220546610 CN201220546610 CN 201220546610 CN 201220546610 U CN201220546610 U CN 201220546610U CN 202868099 U CN202868099 U CN 202868099U
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China
Prior art keywords
stainless steel
weld seam
double layer
steel
compound
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Expired - Fee Related
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CN 201220546610
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Chinese (zh)
Inventor
沈淦荣
杨伟芳
陈文豪
顾苏民
张淮
卞忠景
郑荣
沈树方
杨水泉
陆健
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ZHEJIANG KINGLAND PIPE INDUSTRY Co Ltd
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ZHEJIANG KINGLAND PIPE INDUSTRY Co Ltd
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Abstract

The utility model discloses a stainless steel hybrid welding steel tube which is formed by welding of stainless steel composite hot rolled coils through welded joints. The welded joints are composed of stainless steel double-layer welded joints and carbon steel welded joints. The stainless steel hybrid welding steel tube is high in structural strength and strong in corrosion resistance, and bonding strength between an inner tube and an outer tube is not less than 200M Pa.

Description

The compound welded steel pipe of a kind of stainless steel
Technical field
The utility model relates to the steel tube fabrication technique field, relates in particular the compound welded steel pipe of a kind of stainless steel.
Background technique
In carrying out a lot of Process of Engineering Constructions such as urban construction, car and boat manufacturing, inevitably to use a lot of conveyance conduits, such as direct drinking pipeline, engineering cold hot water piping, hot duct, sewage treatment pipeline, gas pipeline, negative-pressure pipeline etc., these present pipelines, some uses be plastic tube, the plastic tube low price, good corrosion resistance, but its structural strength is not high enough, the damage of easily breaking; Some uses be carbon steel tube, the carbon steel tube structural strength is high, but, its corrosion-resistant, using through being everlasting is corroded behind certain time limit wears, some uses be Stainless Steel Tube, the Stainless Steel Tube structural strength is high, corrosion resistance is strong, but its price is high, is 4 times of Ordinary Steel pipe, is not suitable for large-scale application, popularization.So everybody begins to adopt stainless steel composite pipe, publication number is that the CN2196720 Chinese utility model patent discloses the compound welded steel pipe of a kind of stainless steel, its internal layer is that Stainless Steel Tube, skin are made fused layer for carbon steel tubing, centre with high temperature plastics, and suit pulls into composite steel tube by cold-drawn or expansion.But the stainless steel composite pipe of this sample loading mode, caliber are large not, and the adhesive strength between Stainless Steel Tube and the carbon steel tube is not high enough.Publication number is CN101085455, open day be the manufacture method that the Chinese invention patent on December 12nd, 2007 discloses a kind of spiral composite steel tube, in its patent document, it adopts the mode soldering stainless steel composite steel tube of interior weldering and outside weld, such welding manner, in the interior weldering of carrying out Stainless Steel Tube, inevitably meeting is so that a part of carbon steel penetrates in the molten stainless steel, so that the Stainless Steel Tube anticorrosive property that forms after the welding is poor, the structural strength of whole composite steel tube is not high enough.
The model utility content
The purpose of this utility model is for the deficiencies in the prior art part, provides a kind of stainless steel compound welded steel pipe, produced stainless steel composite pipe, and rotproofness is strong, and structural strength is high.
In order to solve the problems of the technologies described above, technological scheme of the present invention is as follows: the compound welded steel pipe of a kind of stainless steel, the compound welded steel pipe of described stainless steel is welded by weld seam behind cold roll forming by the compound hot-rolled coil of stainless steel, the compound hot-rolled coil of described stainless steel is composited by carbon steel layer and stainless steel double layer metallurgy, and described weld seam is made of stainless steel double layer weld seam and carbon steel weld seam.
The compound welded steel pipe of stainless steel of the present invention, can be as required, determine the outside or the inboard of the composite welding steel pipe of stainless steel double layer behind welding fabrication, in welding, adopt the mode of layering welding to weld, so that the stainless steel composite pipe that forms after the welding, its corrosion resistance and good, structural strength is high.
The compound welded steel pipe of a kind of stainless steel, the compound welded steel pipe of described stainless steel is welded by weld seam behind cold roll forming by the compound hot-rolled coil of stainless steel, the compound hot-rolled coil of described stainless steel is composited by carbon steel layer and stainless steel double layer metallurgy, and described weld seam is made of stainless steel double layer weld seam, carbon steel weld seam and the mesosphere between described stainless steel double layer weld seam and described carbon steel weld seam.
The compound welded steel pipe of stainless steel of the present invention, can be as required, determine the outside or the inboard of the composite welding steel pipe of stainless steel double layer behind welding fabrication, in welding, adopt the mode of layering welding to weld, so that the stainless steel composite pipe that forms after the welding, its corrosion resistance and good, structural strength is high.
As preferably, described mesosphere has a part and the melting of described stainless steel double layer weld seam phase at least, and described mesosphere is the 1/5-1/4 of described intermediate layer thickness with the thickness of described stainless steel double layer weld seam phase melting.
When utilizing carbon steel welding mesosphere, the stainless steel double layer is inevitably understood some and can be melted, infiltrate in the carbon steel liquid that has melted, and stainless steel double layer weld seam falls the interlayer melted that this part contains molten stainless steel, and, the mesosphere is the 1/5-1/4 of described intermediate layer thickness with the thickness of described stainless steel double layer weld seam phase melting, guarantees that the carbon steel weld seam has enough intensity, can guarantee again the Corrosion Protection of stainless steel double layer weld seam.
The manufacture method of the compound welded steel pipe of a kind of stainless steel may further comprise the steps: a) select plate; B) unreel; C) leveling; D mills the limit; E) moulding; F) steel-pipe welding; G) detect; H) sizing cutting, chamfered edge and warehouse-in; What select in the described step a) is the compound hot-rolled coil of stainless steel that is composited by carbon steel layer and stainless steel double layer metallurgy; In the described step f), when the stainless steel double layer is positioned at internal layer, adopt first stainless steel welding stick to weld out stainless steel double layer weld seam with argon arc welding or submerged arc welding mode, then adopt carbon steel to go out the carbon steel weld seam to exchange submerged arc welding; When the stainless steel double layer is positioned at skin, adopt first carbon steel to go out the carbon steel weld seam to exchange submerged arc welding, then adopt stainless steel welding stick to weld out stainless steel double layer weld seam with argon arc welding or submerged arc welding mode; In the described step g), will consist of weld seam sampling by stainless steel double layer weld seam and carbon steel weld seam after, the weld seam of will taking a sample is put into thermosetting acrylic resin and is inserted, and exposes stainless steel double layer face of weld; Or the weld seam of will taking a sample is smeared with high-temperature-resistant epoxy resin, exposes stainless steel double layer face of weld.
The manufacture method of the compound welded steel pipe of stainless steel of the present invention adopts by carbon steel layer and the compound roll bending of the metallurgical compound stainless steel that consists of of stainless steel double layer, carries out twice welding, forms the stainless steel composite pipe that needs; Namely so that the carbon steel weld seam has enough intensity, again so that stainless steel double layer weld seam has enough decay resistances, simultaneously, adopt new intergranular corrosion detecting method, between, the applicant is when carrying out the intergranular corrosion detection to the weld seam after the sampling, be apprised of and have no idea to detect according to method E among the GB/T4334, can only be to carrying out corrosion-resistant detection for the compound roll bending of stainless steel that is welded into pipe, because carbon steel can very fast being eroded by experimental solutions, but, the corrosion resistance of the compound roll bending of stainless steel can not represent the corrosion resistance of our desired stainless steel double layer weld seam, the applicant is through a large amount of research, test, the weld seam of just finding to take a sample is put into the insert weld seam of maybe will taking a sample of thermosetting acrylic resin and is smeared with high-temperature-resistant epoxy resin, expose stainless steel double layer face of weld, can be quick, butt welded seam detects accurately, has guaranteed that multiple layer weld seam has enough decay resistances.
As preferably, in the described step f), after being welded into pipe, stainless steel double layer weld seam and carbon steel weld seam are polished, so that in the tool pipe end 100mm scope, the weld reinforcement of stainless steel double layer weld seam is less than 0.5mm, the weld reinforcement of carbon steel weld seam is less than 0.5mm, to eliminate stress, improve the structural strength of whole welded tube.
As preferably, in the described step f), when the stainless steel double layer is positioned at internal layer, after welding out stainless steel double layer weld seam, utilize scraper plate that stainless steel double layer weld seam pushed, swipes near the surface of described carbon steel weld seam, so that should form concave surface in the surface, then adopt carbon steel to go out the carbon steel weld seam to exchange submerged arc welding; When the stainless steel double layer is positioned at skin, after welding out the carbon steel weld seam, utilize scraper plate that the carbon steel weld seam is pushed, swipes near the surface of described stainless steel double layer weld seam, so that should form concave surface in the surface, then adopt stainless steel electrode to weld out stainless steel double layer weld seam with the argon arc welding welding manner.
Utilize scraper plate that the stainless steel double layer weld seam of ot-yet-hardened pushed, swipes near the surface of carbon steel weld seam, a part of stainless steel double layer weld seam can be scraped, removal is mixed the part of carbon steel liquid stainless steel double layer weld seam, improve the assurance corrosion resistance of whole composite steel tube, and raising weld strength, the surface of being struck off rear stainless steel double layer weld seam forms concave surface, carry out again the welding of carbon steel layer, when forming the carbon steel weld seam, can so that the carbon steel weld seam better and stainless steel double layer weld seam fuse into one, more firm after the connection; In like manner; Utilize scraper plate to be pushed, swipe in the surface of the carbon steel weld seam of ot-yet-hardened, a part of carbon steel weld seam can be scraped, removal is mixed the part of molten stainless steel carbon steel weld seam, improve the weld strength of whole composite steel tube, and guarantee corrosion resistance, the surface of being struck off rear carbon steel weld seam forms concave surface, carry out again the welding of stainless steel double layer, when forming stainless steel double layer weld seam, can so that the carbon steel weld seam better and stainless steel double layer weld seam fuse into one, more firm after the connection.
Further preferred as the manufacture method of the compound welded steel pipe of above-mentioned stainless steel, described extruding, scraping utilization comprise connecting plate and end plate, and the scraper plate of the described end plate lower surface circular arc convex surface that is uniform a plurality of scraping teeth is finished.
The existence of scraping teeth, can set out a plurality of grooves near the surface of stainless steel double layer weld seam or the surperficial formed concave surface of the close carbon steel weld seam of stainless steel double layer weld seam at the carbon steel weld seam, so that stainless steel double layer weld seam and carbon steel weld seam better fuse into one, more help to eliminate stress, so that the carbon steel weld seam is with more firm after stainless steel double layer weld seam is connected.
As further preferred, utilize described scraping teeth scraping to form " V " font scratch at described carbon steel weld seam near the surface of stainless steel double layer weld seam or the surface of the close described carbon steel weld seam of described stainless steel double layer weld seam.
" V " font scratch is so that the carbon steel weld seam is with more firm after stainless steel double layer weld seam is connected.
As further preferred, described circular arc convex surface is provided with the arc groove that is positioned at two outermost scraping teeth outsides, described arc groove and intersection, described end plate side are provided with smooth surface, and described arc groove and described circular arc convex surface intersection are provided with circular arc camber; Utilize described arc groove, described circular arc camber and the scraping of described smooth surface to form and described arc groove, described circular arc camber and the corresponding scratch of described smooth surface shape near the surface of stainless steel double layer weld seam or the surface of the close described carbon steel weld seam of described stainless steel double layer weld seam at described carbon steel weld seam.
The manufacture method of the compound welded steel pipe of a kind of stainless steel may further comprise the steps: a) select plate; B) unreel; C) leveling; D mills the limit; E) moulding; F) steel-pipe welding; G) detect; H) sizing cutting, chamfered edge and warehouse-in; What select in the described step a) is the compound hot-rolled coil of stainless steel that is composited by carbon steel layer and stainless steel double layer metallurgy; Adopt first carbon steel to protect the weldering welding manner with gas in the described step f) and weld out the mesosphere, then adopt stainless steel welding stick to go out stainless steel double layer weld seam with argon arc welding or submerged arc welding, adopt at last carbon steel to go out the carbon steel weld seam to exchange submerged arc welding; In the described step g), will consist of weld seam sampling by stainless steel double layer weld seam and carbon steel weld seam after, the weld seam of will taking a sample is put into thermosetting acrylic resin and is inserted, and exposes stainless steel double layer face of weld; Or the weld seam of will taking a sample is smeared with high-temperature-resistant epoxy resin, exposes stainless steel double layer face of weld.
The manufacture method of the compound welded steel pipe of stainless steel of the present invention adopts by carbon steel layer and the compound roll bending of the metallurgical compound stainless steel that consists of of stainless steel double layer, carries out three welding, forms the stainless steel composite pipe that needs; The existence in mesosphere, namely so that the carbon steel weld seam has enough intensity, again so that stainless steel double layer weld seam has enough decay resistances, simultaneously, adopt new intergranular corrosion detecting method, butt welded seam detects fast and accurately, has guaranteed that multiple layer weld seam has enough decay resistances.
As preferably, in the described step f), after being welded into pipe, stainless steel double layer weld seam and carbon steel weld seam are polished, so that in the tool pipe end 100mm scope, the weld reinforcement of stainless steel double layer weld seam is less than 0.5mm, the weld reinforcement of carbon steel weld seam is less than 0.5mm, to eliminate stress, improve the structural strength of whole welded tube.
As further preferred, in the described step f), weld out the mesosphere after, utilize scraper plate to be pushed, swipe near the surface of described stainless steel double layer weld seam in the mesosphere, so that should form concave surface in the surface.
Utilize scraper plate to be pushed, swipe in the surface in the mesosphere of ot-yet-hardened, a part of mesosphere can be scraped, removal is mixed the part of molten stainless steel mesosphere, improve the weld strength of whole composite steel tube, and guarantee corrosion resistance, the surface of being struck off rear mesosphere forms concave surface, carry out again the welding of stainless steel double layer, when forming stainless steel double layer weld seam, can so that the mesosphere better and stainless steel double layer weld seam fuse into one, more firm after the connection.
As further preferred, described extruding, scraping utilization comprise connecting plate and end plate, and the scraper plate of the described end plate lower surface circular arc convex surface that is uniform a plurality of scraping teeth is finished.
The existence of scraping teeth, the concave surface that can form at the upper surface in mesosphere sets out a plurality of grooves, so that stainless steel double layer weld seam and mesosphere better fuse into one, more help to eliminate stress, so that the mesosphere is with more firm after stainless steel double layer weld seam is connected.
As further preferred, the surface near described stainless steel double layer weld seam forms " V " font scratch in described mesosphere to utilize described scraping teeth scraping.
" V " font scratch is so that the mesosphere is with more firm after stainless steel double layer weld seam is connected.
As preferably, described circular arc convex surface is provided with the arc groove that is positioned at two outermost scraping teeth outsides, and described arc groove and intersection, described end plate side are provided with smooth surface, and described arc groove and described circular arc convex surface intersection are provided with circular arc camber; Utilize described arc groove, described circular arc camber and the scraping of described smooth surface to form and described arc groove, described circular arc camber and the corresponding scratch of described smooth surface shape near the surface of described stainless steel double layer weld seam in described mesosphere.
The setting of arc groove, smooth surface and circular arc camber, the concave surface that can form at the upper surface in mesosphere sets out corresponding circular arc tongue, smooth surface and circular arc camber, the structural strength after this has further strengthened the mesosphere and stainless steel double layer weld seam be connected has been eliminated stress.
Beneficial effect of the present invention is:
Stainless steel composite pipe of the present invention and manufacture method thereof, produced stainless steel composite pipe, structural strength is high, and corrosion resistance is strong, reasonable price.
Description of drawings
The present invention is described further below in conjunction with accompanying drawing:
Fig. 1 is the compound welded steel pipe schematic diagram of stainless steel in the embodiment of the invention 1;
Fig. 2 is the compound welded steel pipe schematic diagram of stainless steel in the embodiment of the invention 2;
Fig. 3 is the compound welded steel pipe schematic diagram of stainless steel in the embodiment of the invention 3;
Fig. 4 is the structural representation of middle scraper of the present invention.
Among the figure:
1-stainless steel double layer;
2-carbon steel layer;
The 3-mesosphere;
4-stainless steel double layer weld seam;
5-carbon steel weld seam;
The 6-scraper plate, 601-connecting plate, 602-end plate, 603-circular arc convex surface, 604-scraping teeth, 605-arc groove, 606-smooth surface, 607-circular arc camber.
Embodiment
The following stated is preferred embodiment of the present invention only, is not that scope of the present invention is limited.
Embodiment 1, see accompanying drawing 1,4, the compound welded steel pipe of a kind of stainless steel, the compound welded steel pipe of described stainless steel is welded by weld seam behind cold roll forming by the compound hot-rolled coil of stainless steel, the compound hot-rolled coil of described stainless steel is composited by carbon steel layer 2 and stainless steel double layer 1 metallurgy, metallurgy of the present invention is compound, also be metallurgy combination, therefore, the compound hot-rolled coil of described stainless steel is the compound hot-rolled coil of stainless steel that is composited by carbon steel layer 2 and stainless steel double layer 1 metallurgy, described weld seam is by stainless steel double layer weld seam 4, carbon steel weld seam 5 consists of, and the thickness of described stainless steel double layer 1 is the 1/5-1/4 of the compound hot-rolled coil thickness of described stainless steel.
The manufacture method of the compound welded steel pipe of a kind of stainless steel may further comprise the steps:
A) select plate; According to the size of stainless steel composite pipe caliber, select the compound hot-rolled coil of stainless steel of respective thickness; The compound hot-rolled coil of stainless steel is metallurgical composite sheet; Be made of stainless steel double layer 1 and carbon steel layer 2, adhesive strength is high between the two;
B) unreel; The compound hot-rolled coil roll coil of strip of the stainless steel that chooses is put into carries out unreel on the reeler;
C) leveling; Lower compression roller in the utilization, the compound hot-rolled coil of stainless steel is flattened straight, for subsequent handling ready; The size of pressure is regulated according to actual conditions; Certainly, also can adopt other known leveling machinery or device to finish leveling to the compound hot-rolled coil of stainless steel;
D mills the limit; The burr of the dual-side of the compound hot-rolled coil of stainless steel, iron rust etc. are cleaned out, to guarantee welding quality, offered bevel for welding, groove angle is 30 ± 5 °;
E) moulding; Utilize spiral pipe making machine, so that the compound hot-rolled coil torsional deformation of stainless steel forms helical; Take spiral welded steel pipe as example in the present embodiment, thus the compound roll bending that rolls of stainless steel is made helical, if longitudinally-welded pipe is rotated into cylindrical shape and gets final product; In moulding, it is noted that and according to the actual needs, to determine that the stainless steel double layer is positioned at internal layer or the outside, carries out bending again, in the present embodiment, stainless steel composite pipe is for the stainless steel double layer is welded into inner tube, in the inboard, the carbon steel layer is welded into outer tube, in the outside; And what weld in the present embodiment is Spiral Steel Pipe, so adopt spiral pipe making machine, certainly can also adopt straight seam welding; Form ERW;
F) steel-pipe welding; In the present embodiment, stainless steel double layer 2 is positioned at internal layer, forms inner tube after the welding, adopts first stainless steel welding stick to weld out stainless steel double layer weld seam 4 with argon arc welding or submerged arc welding mode, then adopts carbon steel to go out carbon steel weld seam 5 to exchange submerged arc welding; In the described step f), be welded into pipe after, stainless steel double layer weld seam and carbon steel weld seam are polished, so that in the tool pipe end 100mm scope, the weld reinforcement of stainless steel double layer weld seam is less than 0.5mm, the weld reinforcement of carbon steel weld seam is less than 0.5mm, to eliminate stress, improve the structural strength of whole welded tube.
G) detect; Welding is finished the spiral welded steel pipe that obtains and is carried out the quality that ultrasound, x ray detect weld seam; Simultaneously, take a sample to consisting of weld seam by stainless steel double layer weld seam and carbon steel weld seam, the weld seam of will taking a sample is put into thermosetting acrylic resin and is inserted, and exposes stainless steel double layer face of weld; Carry out Huey test, the decay resistance of the multiple layer of test rust steel weld seam in addition, can also be smeared the sampling weld seam with high-temperature-resistant epoxy resin, wrap up, and only exposes stainless steel double layer face of weld, and such mode also is fine.
H) sizing cutting, chamfered edge and warehouse-in; Spiral Steel Pipe size as required after detecting is cut, carry out chamfering, flash removed processing after the cutting; Then Spiral Steel Pipe is put in storage.
In the described step f), weld out stainless steel double layer weld seam 4 after, utilize scraper plate that stainless steel double layer weld seam 4 pushed, swipes near the surface of described carbon steel weld seams 5, so that should form concave surface in the surface.
Described extruding, scraping utilize and to comprise connecting plate 601 and end plate 602, and described end plate 602 lower surfaces are that the scraper plate 6 of the circular arc convex surface 603 of uniform a plurality of scraping teeth 604 is finished.Scraping teeth 604 is " V " font, utilizes described scraping teeth 604 scrapings at surface formation " V " font scratch of described stainless steel double layer weld seam 4 near described carbon steel weld seam 5.
Described circular arc convex surface 603 is provided with the arc groove 605 that is positioned at two outermost scraping teeth 604 outsides, described arc groove 605 and intersection, described end plate side are provided with smooth surface 606, and described arc groove 605 and described circular arc convex surface 603 intersections are provided with circular arc camber 607; Utilize described arc groove 905, described circular arc camber 606 and 607 scrapings of described smooth surface on the described end plate 602 to form and described arc groove, described circular arc camber and the corresponding scratch of smooth surface shape on the surface of stainless steel double layer weld seam 4 near described carbon steel weld seam 5.The degree of depth of arc groove 605 is between 1-2mm, the degree of depth of arc groove is only in this scope, the circular arc projection that scrapes just has wholesome effect to the join strength that increases carbon steel weld seam and stainless steel double layer weld seam, and described circular arc camber 607 is identical with the radius of curvature of smooth surface 606.
Embodiment 2, see accompanying drawing 2,4, the compound welded steel pipe of a kind of stainless steel, the compound welded steel pipe of described stainless steel is welded by weld seam behind cold roll forming by the compound hot-rolled coil of stainless steel, the compound hot-rolled coil of described stainless steel is composited by carbon steel layer 2 and stainless steel double layer 1 metallurgy, metallurgy of the present invention is compound, also be metallurgy combination, therefore, the compound hot-rolled coil of described stainless steel is the compound hot-rolled coil of stainless steel that is composited by carbon steel layer 2 and stainless steel double layer 1 metallurgy, described weld seam is by stainless steel double layer weld seam 4, carbon steel weld seam 5 consists of, and the thickness of described stainless steel double layer 1 is the 1/5-1/4 of the compound hot-rolled coil thickness of described stainless steel.
The manufacture method of the compound welded steel pipe of a kind of stainless steel may further comprise the steps:
A) select plate; According to the size of stainless steel composite pipe caliber, select the compound hot-rolled coil of stainless steel of respective thickness; The compound hot-rolled coil of stainless steel is metallurgical composite sheet; Be made of stainless steel double layer 1 and carbon steel layer 2, adhesive strength is high between the two;
B) unreel; The compound hot-rolled coil roll coil of strip of the stainless steel that chooses is put into carries out unreel on the reeler;
C) leveling; Lower compression roller in the utilization, the compound hot-rolled coil of stainless steel is flattened straight, for subsequent handling ready; The size of pressure is regulated according to actual conditions; Certainly, also can adopt other known leveling machinery or device to finish leveling to the compound hot-rolled coil of stainless steel;
D mills the limit; The burr of the dual-side of the compound hot-rolled coil of stainless steel, iron rust etc. are cleaned out, to guarantee welding quality, offered bevel for welding, groove angle is 30 ± 5 °;
E) moulding; Utilize spiral pipe making machine, so that the compound hot-rolled coil torsional deformation of stainless steel forms helical; Take spiral welded steel pipe as example in the present embodiment, thus the compound roll bending that rolls of stainless steel is made helical, if longitudinally-welded pipe is rotated into cylindrical shape and gets final product; In moulding, it is noted that and according to the actual needs, to determine that the stainless steel double layer is positioned at internal layer or the outside, carries out bending again, in the present embodiment, stainless steel composite pipe is for the stainless steel double layer is welded into outer tube, in the outside, the carbon steel layer is welded into inner tube, in the inboard; And what weld in the present embodiment is Spiral Steel Pipe, so adopt spiral pipe making machine, certainly can also adopt straight seam welding; Form ERW;
F) steel-pipe welding; In the present embodiment, stainless steel double layer 2 is positioned at skin, forms outer tube after the welding, adopts first carbon steel to go out carbon steel weld seam 5 to exchange submerged arc welding, then adopts stainless steel welding stick to weld out stainless steel double layer weld seam 4 with argon arc welding or submerged arc welding mode; After being welded into pipe, stainless steel double layer weld seam and carbon steel weld seam are polished, so that in the tool pipe end 100mm scope, the weld reinforcement of stainless steel double layer weld seam is less than 0.5mm, the weld reinforcement of carbon steel weld seam to eliminate stress, improves the structural strength of whole welded tube less than 0.5mm;
G) detect; Welding is finished the spiral welded steel pipe that obtains and is carried out the quality that ultrasound, x ray detect weld seam; Simultaneously, take a sample to consisting of weld seam by stainless steel double layer weld seam and carbon steel weld seam, the weld seam of will taking a sample is put into thermosetting acrylic resin and is inserted, and exposes stainless steel double layer face of weld; Carry out Huey test, the decay resistance of the multiple layer of test rust steel weld seam in addition, can also be smeared the sampling weld seam with high-temperature-resistant epoxy resin, wrap up, and only exposes stainless steel double layer face of weld, and such mode also is fine.
H) sizing cutting, chamfered edge and warehouse-in; Spiral Steel Pipe size as required after detecting is cut, carry out chamfering, flash removed processing after the cutting; Then Spiral Steel Pipe is put in storage.
In the described step f), weld out carbon steel weld seam 5 after, utilize scraper plate that carbon steel weld seam 5 is pushed, swipes near the surface of described stainless steel double layer weld seam 4, so that should form concave surface in the surface.
Described extruding, scraping utilize and to comprise connecting plate 601 and end plate 602, and described end plate 602 lower surfaces are that the scraper plate 6 of the circular arc convex surface 603 of uniform a plurality of scraping teeth 604 is finished.Scraping teeth 604 is " V " font, utilizes described scraping teeth 604 scrapings at surface formation " V " font scratch of described carbon steel weld seam 5 near described stainless steel double layer weld seam 4.
Described circular arc convex surface 603 is provided with the arc groove 605 that is positioned at two outermost scraping teeth 604 outsides, described arc groove 605 and intersection, described end plate side are provided with smooth surface 606, and described arc groove 605 and described circular arc convex surface 603 intersections are provided with circular arc camber 607; Utilize described arc groove 905, described circular arc camber 606 and 607 scrapings of described smooth surface on the described end plate 602 to form and described arc groove, described circular arc camber and the corresponding scratch of smooth surface shape on the surface of carbon steel weld seam 5 near described stainless steel double layer weld seam 4.The degree of depth of arc groove 605 is between 1-2mm, the degree of depth of arc groove is only in this scope, the circular arc projection that scrapes just has wholesome effect to the join strength that increases carbon steel weld seam and stainless steel double layer weld seam, and described circular arc camber 607 is identical with the radius of curvature of smooth surface 606.
Embodiment 3, see accompanying drawing 3,4, the compound welded steel pipe of a kind of stainless steel, the compound welded steel pipe of described stainless steel is welded by weld seam behind cold roll forming by the compound hot-rolled coil of stainless steel, the compound hot-rolled coil of described stainless steel is composited by carbon steel layer 2 and stainless steel double layer 1 metallurgy, metallurgy of the present invention is compound, also be metallurgy combination, described weld seam is by stainless steel double layer weld seam 4, carbon steel weld seam 5 and the mesosphere between described stainless steel double layer weld seam 4 and described carbon steel weld seam 53 consist of, and the thickness of described stainless steel double layer 1 is the 1/5-1/4 of the compound hot-rolled coil thickness of described stainless steel.
The manufacture method of the compound welded steel pipe of a kind of stainless steel may further comprise the steps:
A) select plate; According to the size of stainless steel composite pipe caliber, select the compound hot-rolled coil of stainless steel of respective thickness; The compound hot-rolled coil of stainless steel is metallurgical composite sheet; Be made of stainless steel double layer 1 and carbon steel layer 2, adhesive strength is high between the two;
B) unreel; The compound hot-rolled coil roll coil of strip of the stainless steel that chooses is put into carries out unreel on the reeler;
C) leveling; Lower compression roller in the utilization, the compound hot-rolled coil of stainless steel is flattened straight, for subsequent handling ready; The size of pressure is regulated according to actual conditions; Certainly, also can adopt other known leveling machinery or device to finish leveling to the compound hot-rolled coil of stainless steel;
D mills the limit; The burr of the dual-side of the compound hot-rolled coil of stainless steel, iron rust etc. are cleaned out, to guarantee welding quality, offered bevel for welding, groove angle is 30 ± 5 °;
E) moulding; Utilize spiral pipe making machine, so that the compound hot-rolled coil torsional deformation of stainless steel forms helical; Take spiral welded steel pipe as example in the present embodiment, thus the compound roll bending that rolls of stainless steel is made helical, if longitudinally-welded pipe is rotated into cylindrical shape and gets final product; In moulding, it is noted that and according to the actual needs, to determine that the stainless steel double layer is positioned at internal layer or the outside, carries out bending again, in the present embodiment, stainless steel composite pipe is for the stainless steel double layer is welded into inner tube, in the inboard, the carbon steel layer is welded into outer tube, in the outside;
F) steel-pipe welding; Adopt first carbon steel to weld out mesosphere 3 in direct current submerged arc welding mode, then adopt stainless steel electrode to weld out stainless steel double layer weld seam 4 with the argon arc welding welding manner, adopt at last carbon steel to go out carbon steel weld seam 5 to exchange submerged arc welding; In the described step f), be welded into pipe after, stainless steel double layer weld seam and carbon steel weld seam are polished, so that in the tool pipe end 100mm scope, the weld reinforcement of stainless steel double layer weld seam is less than 0.5mm, the weld reinforcement of carbon steel weld seam is less than 0.5mm, to eliminate stress, improve the structural strength of whole welded tube;
G) detect; Welding is finished the spiral welded steel pipe that obtains and is carried out the quality that ultrasound, x ray detect weld seam; Simultaneously, take a sample to consisting of weld seam by stainless steel double layer weld seam and carbon steel weld seam, the weld seam of will taking a sample is put into thermosetting acrylic resin and is inserted, and exposes stainless steel double layer face of weld; Carry out Huey test, the decay resistance of the multiple layer of test rust steel weld seam in addition, can also be smeared the sampling weld seam with high-temperature-resistant epoxy resin, wrap up, and only exposes stainless steel double layer face of weld, and such mode also is fine.
H) sizing cutting, chamfered edge and warehouse-in; Spiral Steel Pipe size as required after detecting is cut, carry out chamfering, flash removed processing after the cutting; Then Spiral Steel Pipe is put in storage.
In the described step f), weld out mesosphere 3 after, utilize the described mesospheres 3 of 6 pairs of scraper plates to push, swipe near the surface of described stainless steel double layer weld seam 4, so that should form concave surface in the surface.
Described extruding, scraping utilize and to comprise connecting plate 601 and end plate 602, and described end plate 602 lower surfaces are that the scraper plate 6 of the circular arc convex surface 603 of uniform a plurality of scraping teeth 604 is finished.Scraping teeth 604 is " V " font, and the surface near described stainless steel double layer weld seam 4 forms " V " font scratch in described mesosphere 3 to utilize described scraping teeth 604 scrapings.
Described circular arc convex surface 603 is provided with the arc groove 605 that is positioned at two outermost scraping teeth 604 outsides, described arc groove 605 and intersection, described end plate side are provided with smooth surface 606, and described arc groove 605 and described circular arc convex surface 603 intersections are provided with circular arc camber 607; Utilize described arc groove 905, described circular arc camber 606 and 607 scrapings of described smooth surface on the described end plate 602 to form and described arc groove, described circular arc camber and the corresponding scratch of smooth surface shape on the surface of described mesosphere 3 close described stainless steel double layer weld seam 4.The degree of depth of arc groove 605 is between 1-2mm, the degree of depth of arc groove is only in this scope, the circular arc projection that scrapes just has wholesome effect to the join strength that increases mesosphere and stainless steel double layer weld seam, and described circular arc camber 607 is identical with the radius of curvature of smooth surface 606.
Above explanation only is explanation of the invention, so that complete enforcement this programme of those of ordinary skills' energy, but be not limitation of the present invention, those skilled in the art can make the modification that does not have creative contribution to the present embodiment as required after reading this specification, these all are not creative modifications.But as long as in claim scope of the present invention, all be subject to the protection of Patent Law.

Claims (3)

1. compound welded steel pipe of stainless steel, it is characterized in that: the compound welded steel pipe of described stainless steel is welded by weld seam behind cold roll forming by the compound hot-rolled coil of stainless steel, the compound hot-rolled coil of described stainless steel is composited by carbon steel layer and stainless steel double layer metallurgy, and described weld seam is made of stainless steel double layer weld seam and carbon steel weld seam.
2. compound welded steel pipe of stainless steel, it is characterized in that: the compound welded steel pipe of described stainless steel is welded by weld seam behind cold roll forming by the compound hot-rolled coil of stainless steel, the compound hot-rolled coil of described stainless steel is composited by carbon steel layer and stainless steel double layer metallurgy, and described weld seam is made of stainless steel double layer weld seam, carbon steel weld seam and the mesosphere between described stainless steel double layer weld seam and described carbon steel weld seam.
3. the compound welded steel pipe of a kind of stainless steel according to claim 2, it is characterized in that: described mesosphere has a part and the melting of described stainless steel double layer weld seam phase at least, and described mesosphere is the 1/5-1/4 of described intermediate layer thickness with the thickness of described stainless steel double layer weld seam phase melting.
CN 201220546610 2012-10-24 2012-10-24 Stainless steel hybrid welding steel tube Expired - Fee Related CN202868099U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106090451A (en) * 2016-06-03 2016-11-09 合肥紫金钢管股份有限公司 A kind of high-wear-resistancehigh-strength high-strength longitudinal submerged arc welded pipe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN102889434B (en) * 2012-10-24 2015-01-21 浙江金洲管道工业有限公司 Stainless steel compound welding steel pipe and manufacturing method thereof
CN106090451A (en) * 2016-06-03 2016-11-09 合肥紫金钢管股份有限公司 A kind of high-wear-resistancehigh-strength high-strength longitudinal submerged arc welded pipe

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