CN104108009A - Titanium steel composite keel for power plant steel chimney and machining method thereof - Google Patents
Titanium steel composite keel for power plant steel chimney and machining method thereof Download PDFInfo
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- CN104108009A CN104108009A CN201410344127.5A CN201410344127A CN104108009A CN 104108009 A CN104108009 A CN 104108009A CN 201410344127 A CN201410344127 A CN 201410344127A CN 104108009 A CN104108009 A CN 104108009A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
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- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a titanium steel composite keel for a power plant steel chimney and a machining method thereof. An easier and effective titanium steel compounding technology is adopted. The method comprises the following steps: paving welding brazing filler metal between a titanium plate bar (4) and steel plate bars (3); performing spot welding and seam welding on the titanium plate bar and the steel plate bars by using a spot welding machine and a seam welding machine (1) to form the titanium steel composite keel. A titanium steel composite function is simplified into an independent core element, namely, the titanium steel composite keel, and the steel base layer and the titanium base layer of a main body are machined independently before field construction, thereby greatly lowering the construction difficulty. By adopting the titanium steel composite keel, the construction process is simplified, the construction period is shortened, and the potential quality and safety hazards and the like are eliminated effectively.
Description
[technical field]
The present invention relates to a kind of titanium steel composite keel and processing method thereof, relate in particular to titanium steel composite keel and processing method thereof for a kind of power plant steel stack, be specifically related to a kind of power plant inner cylinder of steel chimney fixedly titanium steel composite keel and the processing method thereof of titanium lining.
[background technology]
Known, titanium or titanium alloy is in the situation that possessing low-density, high-melting-point and high specific strength performance, and it also has excellent decay resistance, is therefore widely used in the anticorrosive coat of large-scale component, as prevention of corrosion in steel chimney inner liner, steel-pipe pile protective cover etc.; These application of titanium or titanium alloy all relate to titanium-steel complex technique, the titanium steel composite board production method of generally using is at present that blast is compound, its technique is: steel plate and the blast of titanium plate blank material are compound, be hot-rolled down to certain thickness specification, composite plate machine-shaping, site operation welding, and adopting the interface of blast compound tense titanium and steel easily to produce brittle metal part compound, in follow-up rolling and molding process, this intermetallic compound there will be fragmentation, and then reduces compound intensity; In addition exploding compound itself is the operation that a kind of degree of danger is higher, outdoor work also can be subject to the impact of weather, in the Contraction in Site of prevention of corrosion in steel chimney titanium lining, the gap of titanium lining adopts titanium bar capping welding, no matter the welding of thin titanium board is edge sealing weldering, or the heat affecting of two-layer melting welding is all enough to cause the reduction of titanium plate and steel plate faying face intensity.
Chinese patent: patent name, anticorrosion device for inner cylinder of steel chimney, the patent No., 201020153952.4, Granted publication number, CN201649778U, in this patent, use titanium bolt instead and realize the mechanical connection of steel joist and titanium plate, seal welding between the bolt head of titanium and titanium plate, carries out seal welding between the nut of steel and keel shoe.Although realized the sealing of titanium plate lining, but be that screw thread is flexibly connected between titanium screw rod and steel nut, under the vibration of chimney emission and the effect of expanding with heat and contract with cold, produce motion and increase stress, simultaneously due to the narrow space of site operation, increased the difficulty of weld job and quality prevention and control risk etc.
[summary of the invention]
In order to overcome the deficiency existing in background technology, the invention provides titanium steel composite keel and processing method thereof for a kind of power plant steel stack, the present invention by laying welding filler metal between titanium lath and steel plate bar, then use respectively mash welder and seam welder to carry out spot welding and seam weldering formation titanium steel composite keel to titanium lath and steel plate bar, simplified the program of construction, shorten construction period, effectively eliminated quality and potential safety hazard, accelerated the construction period etc.
For realizing goal of the invention as above, the present invention adopts technical scheme as described below:
A kind of power plant steel stack titanium steel composite keel, comprise steel plate bar and titanium lath, two ends on titanium lath are respectively equipped with outward extending steel plate bar, and the mode that described each steel plate bar and titanium lath add seam weldering by soldering is connected to form described power plant's steel stack titanium steel composite keel.
A processing method for titanium steel composite keel for power plant's steel stack, described method specifically comprises the steps:
One, prepare steel plate bar and titanium lath:
A, get all the titanium plate and steel plate ready;
B, connect step, remove oxide skin and the greasy dirt on titanium plate and steel plate top layer, guarantee that titanium plate and surface of steel plate are bright and clean, non-oxidation, be mingled with, greasy dirt defect;
C, connect step, steel plate is cut into strip as composite steel lath, titanium plate is cut into strip as basic unit's titanium lath;
Two, weldable steel lath and titanium lath:
Connect step, first steel plate bar is overlayed on titanium lath, between steel plate bar and titanium lath, insert welding solder, solder need the straight placement along welding position, further, with mash welder, along welding position spot welding, fixes, then steel plate bar and the titanium lath of by upper welding wheel and the lower welding wheel of seam welder, pushing down a postwelding, now upper welding wheel and lower welding wheel and spot welding is in same straight line, then selects suitable parameter to stitch weldering compound, and the composite plate after seam is soldered into is exactly required titanium steel composite keel.
The processing method of titanium steel composite keel for described power plant's steel stack, the titanium plate in described first step A small step is rolling titanium plate.
The processing method of titanium steel composite keel for described power plant's steel stack, titanium plate surface roughness≤6.3 μ m in described first step B small step, steel surface roughness≤6.3 μ m, the local defect of titanium plate and surface of steel plate needs reconditioning to remove, surface oxide layer is removed in the combination that adopts polishing, sandblast to add pickling, plane, milling either type or various ways when removing the oxide skin of titanium plate and surface of steel plate, to reach surface roughness≤6.3 μ m.
The processing method of titanium steel composite keel for described power plant steel stack, in described second step, solder is any one or the multiple combination in nickel-based solder, silver-base solder, titanium based solder.
The processing method of titanium steel composite keel for described power plant steel stack, in described second step, the spot welding of mash welder distance is chosen in 5～100mm scope, welding parameter scope is electric current 7000～20000A, pressure 0.15～0.65MPa, weld interval 1～5 cycle.
The processing method of titanium steel composite keel for described power plant steel stack, in described second step, the welding parameter of seam welder is electric current 8000～16000A, pressure 3000～9000N, weld intervals 2～5, cycle, rested 1～5 cycle.
The processing method of titanium steel composite keel for described power plant's steel stack, in described second step seam welder when weldering seam upper welding wheel and lower welding wheel Gei Fucengyu basic unit sheet material apply certain electric current, the resistance heat fusing solder producing, Jiang Fucengyu basic unit sheet material is closely linked, composite board itself does not produce fusing, now, by adjusting suitable pressure, electric current and weld interval, prevent that solder from splashing.
The processing method of titanium steel composite keel for described power plant's steel stack, the titanium steel composite keel that described second step obtains is applicable to the combination of all steel members and anticorrosive coat.
Adopt technical scheme as above, the present invention has superiority as described below:
Titanium steel composite keel and processing method thereof for a kind of power plant of the present invention steel stack, the present invention is by adopting more succinct effectively titanium steel complex technique, between titanium lath and steel plate bar, lay welding filler metal, then use respectively mash welder and seam welder to carry out spot welding and seam weldering formation titanium steel composite keel to titanium lath and steel plate bar, the present invention is reduced to a kind of independently core parts-titanium steel composite keel by titanium-steel complex function, the multiple layer of the base steel layer of main body and titanium is realized independent processing before construction at the scene completely, greatly reduce the difficulty of construction, the present invention has not only simplified the program of construction, shortened construction period, quality and potential safety hazard etc. have effectively been eliminated.
[accompanying drawing explanation]
Fig. 1 is the welding schematic diagram of composite keel of the present invention;
In the drawings: 1, seam welder; 2, upper welding wheel; 3, steel plate bar; 4, titanium lath; 5, lower welding wheel.
[specific embodiment]
By the following examples, can explain in more detail the present invention, the present invention is not limited to the following examples;
A kind of power plant steel stack titanium steel composite keel described in 1 by reference to the accompanying drawings, comprise steel plate bar 3 and titanium lath 4, two ends on titanium lath 4 are respectively equipped with outward extending steel plate bar 3, and described each steel plate bar 3 is connected to form described power plant's steel stack titanium steel composite keel with the mode that titanium lath 4 adds seam weldering by soldering.
The processing method of titanium steel composite keel for a kind of power plant of the present invention steel stack, described method specifically comprises the steps:
One, prepare steel plate bar 3 and titanium lath 4:
A, get all the titanium plate and steel plate ready, described titanium plate is rolling titanium plate;
B, connect step, remove oxide skin and the greasy dirt on titanium plate and steel plate top layer, guarantee that titanium plate and surface of steel plate are bright and clean, non-oxidation, be mingled with, greasy dirt defect, wherein said titanium plate surface roughness≤6.3 μ m, steel surface roughness≤6.3 μ m, the local defect of titanium plate and surface of steel plate needs reconditioning to remove, surface oxide layer is removed in the combination that adopts polishing, sandblast to add the either types such as pickling, plane, milling or various ways when removing the oxide skin of titanium plate and surface of steel plate, to reach surface roughness≤6.3 μ m;
C, connect step, steel plate is cut into strip as composite steel lath 3, titanium plate is cut into strip as basic unit's titanium lath 4;
Two, weldable steel lath 3 and titanium lath 4:
Connect step, first steel plate bar 3 is overlayed on titanium lath 4, at steel plate bar 3 and 4 of titanium laths, insert welding solder, described solder is nickel-based solder, silver-base solder, any one in titanium based solder or multiple combination, solder need the straight placement along welding position, further with mash welder, along welding position spot welding, fix, the spot welding distance of described mash welder is chosen in 5～100mm scope, welding parameter scope is electric current 7000～20000A, pressure 0.15～0.65MPa, weld interval 1～5 cycle, then steel plate bar 3 and the titanium lath 4 of by upper welding wheel 2 and the lower welding wheel 5 of seam welder 1, pushing down a postwelding, now upper welding wheel 2 and lower welding wheel 5 and spot welding are in same straight line, select suitable parameter stitch weldering compound, the welding parameter of described seam welder 1 is electric current 8000～16000A, pressure 3000～9000N, weld intervals 2～5 cycle, rest 1～5 cycle, in concrete welding process, seam welder 1 upper welding wheel 2 and lower welding wheel 5 Gei Fucengyu basic unit sheet materials when seam weldering apply certain electric current, the resistance heat fusing solder producing, Jiang Fucengyu basic unit sheet material is closely linked, composite board itself does not produce fusing, now by adjusting suitable pressure, electric current and weld interval, prevent that solder from splashing, between its light plate and titanium plate, can adopt single weld seam, two weld seams or many weld seams stitch weldering welding, realize combining closely of titanium-steel plate, composite plate after seam is soldered into is exactly required titanium steel composite keel.
The specific embodiment of the present invention is as follows:
With the composite keel seam weldering test of 1.5mmTA1 plate and 2mmQ235B lath, concrete operations are as follows:
One, top layer cleaning:
A, Cold-rolled Pure titanium plate any surface finish, non-oxidation, be mingled with, the defect such as greasy dirt, specially treated again;
B, steel plate are used 100# sized flap wheel to carry out two-sided reconditioning scale removal, appear metal true qualities;
C, steel plate Q235B is cut into fillet as multiple layer, overlays on titanium plate, steel plate bar 3 limit portions exceed titanium lath 4 edge 15mm;
Two, composite keel welding:
In basic unit, insert welding solder with multiple interlayer, solder need the straight placement along welding position, with ac spot welding machine, along welding position spot welding, fix, spot welding distance can be chosen in 40～100mm scope, welding parameter scope: electric current 180A, pressure 2.5MPa, weld intervals 5 cycle, with seam welder 1 upper welding wheel 2 and lower welding wheel 5, push down composite board, upper welding wheel 2 and lower welding wheel 5 spot welding are in same straight line, and welding parameter is electric current 10500A, pressure 6000N, weld intervals 3 cycle, be 2 cycles idle hours, the weldering of two weld seams seam.
The evaluation of seam weldering effect
The composite keel of double slit seam postwelding carries out shear strength, bending, peels off detection, and to determine its bond strength, testing result is as following table:
| Test item | Testing result |
| Shear strength | 99.25MPa |
| Crooked | 180 ° of clod washes of R=3T are without cracking, layering |
| Peel off | 1816.7N |
| Conclusion | Meet user demand |
Concrete effect of the present invention is:
The present invention adopts the mode of seam weldering to realize the compound of steel plate and titanium plate, and weld seam can be wall scroll, also can be two bars or many, to mate different bond strength requirements, more than wherein the combination shearing intensity of single weld seam seam weldering can reach 80Mpa, under R=3T, 180 ° of bending conditions, without delamination splitting, tear edge can reach 760N, intensity meets user demand completely, and while adopting two weld seams or the weldering of many weld seams seam, bond strength has had higher safety factor.
In actual production process, really realize the independent machine-shaping of titanium plate and steel plate, saved the process compound, rolling of exploding, reel forming also only need be for steel inner cylinder, not only reduced the difficulty of welding procedure, avoid the risk to chimney of electric plant composite bed strength failure, and shortened greatly fabrication cycle.Chimney with the 3 * 600MW of power plant transform example as, approximately need 1500t titanium steel composite board, adopt the present invention, can save on the one hand the blast of nearly 1500 tons of titanium steel composite board materials compound with rolling expense, it is considerable saving cost, can shorten on the other hand getting the raw materials ready the time of blast compound and rolling, eliminate blast to the harmful effect of environment etc. simultaneously.
The application of titanium steel composite keel of the present invention and the mounting means inventor declare patent separately, at this, will not tire out and state.
It should be noted that the present invention is not only applicable to power plant's steel stack, be equally also applicable to the combination of all steel members and anticorrosive coat.
Part not in the detailed description of the invention is prior art.
The embodiment selecting in this article in order to disclose object of the present invention, currently thinks suitablely, still, will be appreciated that, the present invention is intended to comprise that all belong to all changes and the improvement of the embodiment in this design and invention scope.
Claims (9)
1.Yi Zhong power plant steel stack titanium steel composite keel, comprise steel plate bar (3) and titanium lath (4), it is characterized in that: the two ends on titanium lath (4) are respectively equipped with outward extending steel plate bar (3), described each steel plate bar (3) is connected to form described power plant's steel stack titanium steel composite keel with the mode that titanium lath (4) adds seam weldering by soldering.
2. a kind of power plant steel stack implementing the claims described in 1 is used the processing method of titanium steel composite keel with a kind of power plant steel stack of titanium steel composite keel, it is characterized in that: described method specifically comprises the steps:
One, prepare steel plate bar (3) and titanium lath (4):
A, get all the titanium plate and steel plate ready;
B, connect step, remove oxide skin and the greasy dirt on titanium plate and steel plate top layer, guarantee that titanium plate and surface of steel plate are bright and clean, non-oxidation, be mingled with, greasy dirt defect;
C, connect step, steel plate is cut into strip as composite steel lath (3), titanium plate is cut into strip as basic unit's titanium lath (4);
Two, weldable steel lath (3) and titanium lath (4):
Connect step, first steel plate bar (3) is overlayed on titanium lath (4), between steel plate bar (3) and titanium lath (4), insert welding solder, solder need the straight placement along welding position, further, with mash welder, along welding position spot welding, fix, then use the upper welding wheel (2) of seam welder (1) and steel plate bar (3) and the titanium lath (4) that lower welding wheel (5) is pushed down a postwelding, now upper welding wheel (2) and lower welding wheel (5) and spot welding are in same straight line, then select suitable parameter stitch weldering compound, composite plate after seam is soldered into is exactly required titanium steel composite keel.
3. the processing method of titanium steel composite keel for power plant according to claim 2 steel stack, is characterized in that: the titanium plate in described first step A small step is rolling titanium plate.
4. the processing method of titanium steel composite keel for power plant according to claim 2 steel stack, it is characterized in that: titanium plate surface roughness≤6.3 μ m in described first step B small step, steel surface roughness≤6.3 μ m, the local defect of titanium plate and surface of steel plate needs reconditioning to remove, surface oxide layer is removed in the combination that adopts polishing, sandblast to add pickling, plane, milling either type or various ways when removing the oxide skin of titanium plate and surface of steel plate, to reach surface roughness≤6.3 μ m.
5. the processing method of titanium steel composite keel for power plant according to claim 2 steel stack, is characterized in that: in described second step, solder is any one or the multiple combination in nickel-based solder, silver-base solder, titanium based solder.
6. the processing method of titanium steel composite keel for power plant according to claim 2 steel stack, it is characterized in that: in described second step, the spot welding of mash welder distance is chosen in 5～100mm scope, welding parameter scope is electric current 7000～20000A, pressure 0.15～0.65MPa, weld interval 1～5 cycle.
7. the processing method of titanium steel composite keel for power plant according to claim 2 steel stack, it is characterized in that: the welding parameter of seam welder in described second step (1) is electric current 8000～16000A, pressure 3000～9000N, weld intervals 2～5, cycle, rested 1～5 cycle.
8. the processing method of titanium steel composite keel for power plant according to claim 2 steel stack, it is characterized in that: seam welder in described second step (1) when weldering seam upper welding wheel (2) and lower welding wheel (5) Gei Fucengyu basic unit sheet material apply certain electric current, the resistance heat fusing solder producing, Jiang Fucengyu basic unit sheet material is closely linked, composite board itself does not produce fusing, now, by adjusting suitable pressure, electric current and weld interval, prevent that solder from splashing.
9. the processing method of titanium steel composite keel for power plant according to claim 2 steel stack, is characterized in that: the titanium steel composite keel that described second step obtains is applicable to the combination of all steel members and anticorrosive coat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410344127.5A CN104108009A (en) | 2014-07-17 | 2014-07-17 | Titanium steel composite keel for power plant steel chimney and machining method thereof |
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| CN201410344127.5A CN104108009A (en) | 2014-07-17 | 2014-07-17 | Titanium steel composite keel for power plant steel chimney and machining method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115194278A (en) * | 2022-08-11 | 2022-10-18 | 中车青岛四方机车车辆股份有限公司 | Sealing brazing method and brazing system |
| CN118438022A (en) * | 2024-07-08 | 2024-08-06 | 贵州永红航空机械有限责任公司 | Resistance welding method for curved surface cavity splicing structure |
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| CN201649778U (en) * | 2010-04-09 | 2010-11-24 | 陈选玲 | Steel chimney internal cylinder corrosion prevention device |
| CN201704803U (en) * | 2010-03-26 | 2011-01-12 | 西安天元合成材料有限公司 | Expansion joint corrosion prevention device of chimney inner wall |
| CN102500900A (en) * | 2011-11-22 | 2012-06-20 | 西安优耐特容器制造有限公司 | Preparation method for dissimilar metal plate loose lining |
| CN103769741A (en) * | 2014-02-24 | 2014-05-07 | 洛阳双瑞金属复合材料有限公司 | Explosive repair welding method for defects of titanium steel composite material |
| CN103850514A (en) * | 2014-03-26 | 2014-06-11 | 陈宏亮 | Structure and method for anti-corrosive treatment of pure titanium plates of chimney steel inner cylinder and steel structure flue |
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2014
- 2014-07-17 CN CN201410344127.5A patent/CN104108009A/en active Pending
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| CN201704803U (en) * | 2010-03-26 | 2011-01-12 | 西安天元合成材料有限公司 | Expansion joint corrosion prevention device of chimney inner wall |
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| CN102500900A (en) * | 2011-11-22 | 2012-06-20 | 西安优耐特容器制造有限公司 | Preparation method for dissimilar metal plate loose lining |
| CN103769741A (en) * | 2014-02-24 | 2014-05-07 | 洛阳双瑞金属复合材料有限公司 | Explosive repair welding method for defects of titanium steel composite material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115194278A (en) * | 2022-08-11 | 2022-10-18 | 中车青岛四方机车车辆股份有限公司 | Sealing brazing method and brazing system |
| CN115194278B (en) * | 2022-08-11 | 2023-10-27 | 中车青岛四方机车车辆股份有限公司 | Sealing brazing method and brazing system |
| CN118438022A (en) * | 2024-07-08 | 2024-08-06 | 贵州永红航空机械有限责任公司 | Resistance welding method for curved surface cavity splicing structure |
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Application publication date: 20141022 |