CN105081541A - Method for producing semi-metallurgical metal composite tube through electric resistance welding - Google Patents
Method for producing semi-metallurgical metal composite tube through electric resistance welding Download PDFInfo
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- CN105081541A CN105081541A CN201510579275.XA CN201510579275A CN105081541A CN 105081541 A CN105081541 A CN 105081541A CN 201510579275 A CN201510579275 A CN 201510579275A CN 105081541 A CN105081541 A CN 105081541A
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/34—Preliminary treatment
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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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- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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Abstract
The invention discloses a method for producing a semi-metallurgical metal composite tube through electric resistance welding. The method includes the steps that firstly, a base tube and a liner tube are machined; secondly, the base tube and the liner tube are assembled and mechanically composited to form a mechanical metal composite tube; thirdly, welding preparation of electric resistance welding is conducted, two electric resistance welding electrodes of an electric resistance welding machine are installed at the two ends of the mechanical metal composite tube respectively, one electric resistance welding electrode is installed on the extending section at one end of the liner tube, and the other electric resistance welding electrode is installed at one end of the base tube; fourthly, electric resistance welding is conducted, the base tube and the liner tube in the mechanical metal composite tube are welded through the electric resistance welding machine; and fifthly, subsequent machining is carried out. The method is simple in step, reasonable in design, convenient to implement, high in welding quality and good in use effect. Bonding strength between the base tube and the liner tube in the machined and formed semi-metallurgical metal composite tube is high. Besides, machining efficiency is high, and machining quality is easy to guarantee.
Description
Technical field
The invention belongs to multiple tube processing technique field, especially relate to a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe.
Background technology
In the last few years, metal compounded pipe (also referred to as bimetal compound pipeline) was at oil and gas exploitation and transport, obtain increasingly extensive application in chemical industry and water supply and drainage industry.Metal compounded pipe is a kind of high-tech product combined in different forms by combination process by the metallic conduit of two kinds of unlike materials.By base tube and coaxial package, the bushing pipe in base tube forms metal composite pipe, outside base tube mainly plays pressure-bearing and pipeline rigid support, and the bushing pipe of inside effectively can bear the corrosion-resistant effect of pipeline, thus give full play to two kinds of material tubing excellent specific property separately, and significantly save expensive lining alloy material.Therefore, metal composite pipe has great cost advantage compared to the pure material pipeline of anti-corrosion lining.
Metal compounded pipe can be divided into mechanical type metal composite pipe and metallurgy type metal composite pipe two kinds according to the interface form after base lining compound.Wherein, mechanical type metal composite pipe makes bushing pipe generation plastic deformation by spinning complex technique, hydraulic expanding-forming technology or detonation technology under water etc., when realizing the actual use of mechanical interference between base tube and bushing pipe, machinery complex method all ubiquity base bushing pipe bond strength this mass defect not high, in actual military service process easily there is the bulge problem caused because base bushing pipe bond strength is not high in bushing pipe, seriously reduce the security that product uses, strongly limit the range of application of metal composite pipe simultaneously.
Metallurgy type metal composite pipe is the compound realizing between base tube and bushing pipe by Metallurgical processing technique.Because its base tube and bushing pipe interface are metallurgical binding, therefore bond strength is far away higher than mechanical type multiple tube.The manufacturing process of metallurgy type metal composite pipe has a variety of, as built-up welding in metallurgical composite plate roll bending welding, centrifugal casting, pipe, the soldering etc. of base lining, but has some to be also in conceptual phase in above-mentioned technique, has that some manufacturing process are loaded down with trivial details and cost is higher.Thus, need design a kind of method step simple, reasonable in design and realize the metal composite pipe processing method convenient, welding quality is high, result of use is good, the bond strength in the metal composite pipe of machine-shaping between base tube and bushing pipe is high.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe is provided, its method step is simple, reasonable in design and realization is convenient, welding quality is high, result of use good, bond strength in half metallurgy type metal composite pipe of machine-shaping between base tube and bushing pipe is high, and working (machining) efficiency is high, crudy is easy to ensure.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe, is characterized in that the method comprises the following steps:
Step one, base tube and bushing pipe are processed: process respectively the base tube of produced metal composite pipe and bushing pipe, the length of described bushing pipe is greater than the length of base tube;
Step 2, base tube and bushing pipe assemble and mechanical compound: coaxially loaded in base tube by bushing pipe described in step one, and the two ends of bushing pipe are all extend out to outside base tube; Adopt bimetal tube machinery complex method base tube and bushing pipe to be complex as a whole again, form mechanical type metal composite pipe; The described bushing pipe two ends sections extend out to outside base tube is overhanging section;
Step 3, electric resistance welding prepare: two of resistance welder resistance welding electrodes are arranged on described mechanical type metal composite pipe two ends respectively, resistance welding electrode described in one of them is arranged on overhanging section of bushing pipe one end, and resistance welding electrode described in another is arranged on one end of base tube;
Step 4, electric resistance welding: adopt resistance welder to weld with bushing pipe the base tube in described mechanical type metal composite pipe, obtain half metallurgy type metal composite pipe;
Step 5: following process: the sections that bushing pipe in half metallurgy type metal composite pipe described in step 4 extend out to outside base tube is excised, again pipe end soldering and sealing or pipe end built-up welding are carried out to described half metallurgy type metal composite pipe, obtain half metallurgy type metal composite pipe finished product.
A kind of above-mentioned method adopting electric resistance welding to produce half metallurgy type metal composite pipe, is characterized in that: the machinery of bimetal tube described in step 2 complex method is spinning process, hydraulic expanding-forming method or detonation composite algorithm, described in the length L=15mm ~ 200mm of the section of stretching out.
A kind of above-mentioned method adopting electric resistance welding to produce half metallurgy type metal composite pipe, it is characterized in that: in step 3, two described resistance welding electrodes are respectively the first welding tooling and the second welding tooling, described first welding tooling forms electric resistance welding frock with the second welding tooling and the two is connected with two power output ends of resistance welder respectively; When carrying out electric resistance welding preparation in step 3, row is put into described resistance welder and installs;
Described first welding tooling comprises the first case that gripping sleeve is contained in the first electrode on overhanging section of bushing pipe and is sleeved on outside described first electrode, described first electrode is laid in coaxial with bushing pipe, and the material of described first case is identical with the material of described first electrode; Described second welding tooling comprises the second case that gripping sleeve is contained in the second electrode on base tube and is sleeved on outside described second electrode, and described second electrode is laid in coaxial with base tube, and the material of described second case is identical with the material of described second electrode.
A kind of above-mentioned method adopting electric resistance welding to produce half metallurgy type metal composite pipe, it is characterized in that: described first electrode and described second electrode are cylinder electrode, described first case and described second case are taper shape and the diameter of the two all reduces from the inside to the outside gradually; Described first case and the second case are all laid in coaxial with described mechanical type metal composite pipe, and described first case and the second case are by coniform shell and the plugging plate composition bottom opening of described coniform shell being carried out to shutoff; The plugging plate of described first case is arranged on the middle part of described first electrode, and has the installing port installed for described first electrode in the middle part of the plugging plate of described first case; The plugging plate of described second case is arranged on the middle part of described second electrode, and has the installing port installed for described second electrode in the middle part of the plugging plate of described second case.
A kind of above-mentioned method adopting electric resistance welding to produce half metallurgy type metal composite pipe, is characterized in that: described first electrode and described first case processing and fabricating are integrated, and described second electrode and described second case processing and fabricating are integrated; Described first electrode is identical with the material of described second electrode; The material of described first electrode is copper, cadmium copper, silver-bearing copper, chromium-copper, zirconium copper, chromium silver-bearing copper or chromium magnalium copper.
A kind of above-mentioned method adopting electric resistance welding to produce half metallurgy type metal composite pipe, is characterized in that: carry out base tube in step 2 and bushing pipe assembles and before mechanical compound, also need to clear up respectively the inner surface of base tube and the outer surface of bushing pipe; Before carrying out electric resistance welding preparation in step 3, also need to carry out grinding process respectively on base tube and overhanging section of bushing pipe upper installation site of installing described resistance welding electrode;
Base tube is carried out and bushing pipe assembles and before mechanical compound, also need to carry out blasting treatment to the inner surface of base tube and/or the outer surface of bushing pipe in step 2.
A kind of above-mentioned method adopting electric resistance welding to produce half metallurgy type metal composite pipe, is characterized in that: when adopting resistance welder to weld with bushing pipe the base tube in described mechanical type metal composite pipe in step 4, adopts dot welding method to weld; After welding, the contact surface between described base tube and bushing pipe forms multiple nugget.
A kind of above-mentioned method adopting electric resistance welding to produce half metallurgy type metal composite pipe, it is characterized in that: base tube described in step one is carbon steel base tube, described bushing pipe is corrosion resistant alloy bushing pipe; When carrying out electric resistance welding in step 4, welding current is 150A ~ 30000A.
A kind of above-mentioned method adopting electric resistance welding to produce half metallurgy type metal composite pipe, is characterized in that: before carrying out following process in step 5, first close resistance welder, and removes the first welding tooling and the second welding tooling; Before pipe end soldering and sealing or pipe end built-up welding being carried out to described half metallurgy type metal composite pipe in step 5, endoscopy need be carried out to described half metallurgy type metal composite pipe; In step 5, pipe end soldering and sealing or pipe end heap postwelding are carried out to described half metallurgy type metal composite pipe, also need at the tube end maching hoop groove of described half metallurgy type metal composite pipe.
A kind of above-mentioned method adopting electric resistance welding to produce half metallurgy type metal composite pipe, it is characterized in that: before pipe end soldering and sealing or pipe end built-up welding being carried out to described half metallurgy type metal composite pipe in step 5, need carry out sampling inspection to described half metallurgy type metal composite pipe, the sampling inspection carried out comprises bond strength inspection and the metal lographic examination of base lining combination interface; After in step 5, following process completes, also need to carry out radiographic inspection and hydraulic pressure test to described half metallurgy type metal composite pipe finished product.
The present invention compared with prior art has the following advantages:
1, method step is simple, reasonable in design and realize convenient, and input cost is lower.
2, process is reasonable in design and realize convenient, mainly comprises base tube and bushing pipe is processed, base tube and bushing pipe assembles and mechanical compound, welding tooling install the step such as (namely electric resistance welding prepares), electric resistance welding, following process and related check.
3, the electric resistance welding tool structure adopted is simple, reasonable in design and processing and fabricating and installation are laid conveniently, result of use is good, in Resistance Welding termination process, by electric resistance welding frock make the gap between base tube and bushing pipe formed one with the cavity of extraneous relative insulation, can effectively ensure electric resistance welding quality, and effectively can strengthen the bond strength of base lining combination interface; Meanwhile, the first welding tooling in electric resistance welding frock and the second welding tooling, respectively as two resistance welding electrodes uses of resistance welder, have the advantages such as dismounting is easy, easy-to-connect, result of use are good.
4, process is reasonable in design, result of use good and practical value is high, to take full advantage of in mechanical type metal composite pipe base tube to the normal pressure of bushing pipe and contact resistance, and without the need to additionally applying precompressed.Because typical mechanical type metal composite pipe is generally be made up of as the stainless steel of the base tube and excellent corrosion-proof performance that play mechanical support effect or corrosion resistant alloy bushing pipe the carbon steel pipe of high strength.The distortion that bushing pipe occurs is to be plastic deformation to master, and base tube distortion is then based on elastic deformation.After compound, bushing pipe by the normal pressure of base tube, thus realizes mechanical compound.The contact surface of this mechanical compound is the contact of two planes that there is many concaveconvex structures on microcosmic, as shown in Figure 3.Especially assemble the blasting treatment to base tube and/or bushing pipe before compound, more increase the concavo-convex of base tube inner surface and/or bushing pipe outer surface; This is not contact completely with regard to the contact surface after causing mechanical compound, but the localized contact on microcosmic, namely there is contact resistance.Electric resistance welding is a kind of contact resistance utilized between two or more conductor in essence, under certain pressure effect, realizes local pyrexia, molten material realizes welding and the method be connected.As can be seen here, the loading characteristic of mechanical type metal composite pipe is not only electric resistance welding and provides normal pressure, and also provides the contact resistance between base lining, and this is just for electric resistance welding provides prerequisite.When big current is instantaneously by base lining contact surface, the existence that Yin Ji serves as a contrast Contact resistance causes the part of actual contact on contact surface generate heat and melt, finally realize the local metallurgical binding of base tube and bushing pipe, also just define so-called " half metallurgy type metal composite pipe ".
5, welding quality is high, result of use good, and the bond strength between base tube and bushing pipe is high, and working (machining) efficiency is high, and crudy is easy to ensure.The present invention be a kind of utilize mechanical type metal composite pipe base serve as a contrast between normal pressure and contact resistance, resistance welding technology is adopted to pass into instantaneous large-current to mechanical type multiple tube base lining combination interface, make the partial contact zones on microcosmic form microcosmic nugget, thus manufacture the method for half metallurgy type metal composite pipe.Therefore, utilize electric resistance welding that the mechanical bond between mechanical type multiple tube base lining can be made to change the local metallurgical binding (forming half metallurgy type metal composite pipe) of microcosmos area into, improve base lining bond strength, thus solve the difficult problem that between mechanical type multiple tube base lining, bond strength is not high.And compared with the complicated technology of metallurgy type multiple tube, the present invention has that technique is simple, with low cost, production efficiency is high, low power consumption and other advantages.Meanwhile, the present invention is adopted not destroy the original mechanics of multiple tube and corrosion resisting property.Although very high at the instantaneous temperature of contact surface, but because resistance welding time is very of short duration, be generally between a few tens of milliseconds to hundreds of millisecond, the nugget size therefore formed in microcosmos area is very little, therefore can not impact the overall mechanical property of base tube and bushing pipe and corrosive nature.
6, widely applicable and popularizing application prospect is extensive, can be applicable to the metal composite pipe processing in the fields such as petroleum gas, chemical industry, electric power, water delivery, food, make mechanical type metal composite pipe form half metallurgy type metal composite pipe by electric resistance welding mode.
In sum, the inventive method step is simple, reasonable in design and realization is convenient, welding quality is high, result of use good, bond strength in half metallurgy type metal composite pipe of machine-shaping between base tube and bushing pipe is high, and working (machining) efficiency is high, crudy is easy to ensure, effectively can solve existing machinery formula composite bimetal pipe and easily occur the mass defect problems such as base lining bond strength is low, bulge inefficacy.Meanwhile, compared to complex process, working (machining) efficiency is lower, cost is high shortcoming that metallurgy type metal composite pipe processing method exists, the present invention has that input cost is low, technical process simple, be easy to realize, production efficiency is high, low power consumption and other advantages.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the method flow block diagram of the present invention when producing half metallurgy type metal composite pipe.
Fig. 2 is the electric resistance welding view of the present invention when producing half metallurgy type metal composite pipe.
Fig. 3 is the microstructure schematic diagram of base lining contact surface in mechanical type metal composite pipe of the present invention.
Fig. 4 is the microstructure schematic diagram of base lining contact surface in the present invention half metallurgy type metal composite pipe.
Description of reference numerals:
1-base tube; 2-the first welding tooling; 3-bushing pipe;
4-the second welding tooling; 5-resistance welder; 6-nugget.
Detailed description of the invention
Embodiment 1
A kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe as shown in Figure 1, comprises the following steps:
Step one, base tube and bushing pipe are processed: process respectively the base tube 1 of produced metal composite pipe and bushing pipe 3, the length of described bushing pipe 3 is greater than the length of base tube 1;
Step 2, base tube and bushing pipe assemble and mechanical compound: load coaxial for bushing pipe 3 described in step one in base tube 1, and make the two ends of bushing pipe 3 all extend out to outside base tube 1; Adopt bimetal tube machinery complex method base tube 1 and bushing pipe 3 to be complex as a whole again, form mechanical type metal composite pipe; The described bushing pipe 3 two ends sections extend out to outside base tube 1 is overhanging section; In described mechanical type metal composite pipe, the microstructure of base lining contact surface, refers to Fig. 3;
Step 3, electric resistance welding prepare: two of resistance welder 5 resistance welding electrodes are arranged on described mechanical type metal composite pipe two ends respectively, resistance welding electrode described in one of them is arranged on overhanging section of bushing pipe 3 one end, and resistance welding electrode described in another is arranged on one end of base tube 1;
Step 4, electric resistance welding: adopt resistance welder 5 to weld with bushing pipe 3 base tube 1 in described mechanical type metal composite pipe, obtain half metallurgy type metal composite pipe;
Step 5: following process: the sections that bushing pipe 3 in half metallurgy type metal composite pipe described in step 4 extend out to outside base tube 1 is excised, again pipe end soldering and sealing or pipe end built-up welding are carried out to described half metallurgy type metal composite pipe, obtain half metallurgy type metal composite pipe finished product.
In the present embodiment, base tube 1 described in step one is carbon steel base tube, and described bushing pipe 3 is corrosion resistant alloy bushing pipe.Further, the length L=15mm ~ 200mm of the section of stretching out described in step 2.Wherein, the material of corrosion resistant alloy bushing pipe is stainless steel, nickel-base alloy or Cu alloy material.
In the present embodiment, process half metallurgy type metal composite pipe finished product specification be Φ 114 × (10+2) mm, the material of described base tube 1 is L360QS carbon steel, and the external diameter of base tube 1 is Φ 114mm, length is 2m and its wall thickness is 10mm; The material of described bushing pipe 3 is 316L stainless steel and its wall thickness is 2mm, and the external diameter of described bushing pipe 3 is Φ 90mm and its length is 2.2m.
In step one, added to base tube 1 and bushing pipe 3 man-hour, the length 2L larger than the length of base tube 1 of described bushing pipe 3.Actually add man-hour, can according to specific needs, the value size of L be adjusted accordingly.Further, the external diameter of described base tube 1 is larger, and the value of L is larger.Further, the external diameter of described bushing pipe 3 is less than the internal diameter of base tube 1, and the gap between described base tube 1 and bushing pipe 3 is determined according to the matching requirements of common metal multiple tube.In the present embodiment, the L=100mm described in step 2.
In the present embodiment, as shown in Figure 2, in step 3, two described resistance welding electrodes are respectively the first welding tooling 2 and the second welding tooling 4, and described first welding tooling 2 forms electric resistance welding frock with the second welding tooling 4 and the two is connected with two power output ends of resistance welder 5 respectively; When carrying out electric resistance welding preparation in step 3, row is put into described resistance welder and installs.
Described first welding tooling 2 comprises the first case that gripping sleeve is contained in the first electrode on overhanging section of bushing pipe 3 and is sleeved on outside described first electrode, described first electrode is laid in coaxial with bushing pipe 3, and the material of described first case is identical with the material of described first electrode; Described second welding tooling 4 comprises the second case that gripping sleeve is contained in the second electrode on base tube 1 and is sleeved on outside described second electrode, and described second electrode is laid in coaxial with base tube 1, and the material of described second case is identical with the material of described second electrode.
When reality fixedly mounts the installation of described resistance welder threading row, need guarantee to connect reliably.In the present embodiment, described first welding tooling 2 is connected with two power output ends of resistance welder 5 by power line respectively with the second welding tooling 4.
In the present embodiment; base tube is carried out and bushing pipe assembles and before mechanical compound in step 2; also need to clear up respectively the inner surface of base tube 1 and the outer surface of bushing pipe 3, guarantee that the contact surface (contact surface namely between base tube 1 and bushing pipe 3) that base lining combines is clean.
Base tube is carried out and bushing pipe assembles and before mechanical compound, also need to carry out blasting treatment to the inner surface of base tube 1 and/or the outer surface of bushing pipe 3 in step 2.In the present embodiment, only blasting treatment is carried out to the inner surface of base tube 1.
In the present embodiment, when the inner surface of base tube 1 is cleared up, derusting by sandblasting and dehumidifying and dust removal process need be carried out to the inner surface of base tube 1, and adopt air-heater to carry out dehumidifying and dust removal process.When the outer surface of bushing pipe 3 is cleared up, oil removing and dust removal process need be carried out to the outer surface of bushing pipe 3.Further, when carrying out oil removing and dust removal process to the outer surface of bushing pipe 3, acetone is adopted to clean the outer surface of bushing pipe 3.During actual use, other cleaning agent also can be adopted to clean.After having cleared up, guarantee the outer surface of the inner surface of base tube 1 and bushing pipe 3 all rustless, without oil and free from dust.
Actually add man-hour, the machinery of bimetal tube described in step 2 complex method is spinning process, hydraulic expanding-forming method or detonation composite algorithm.Wherein, hydraulic expanding-forming method and detonation composite algorithm are conventional bimetal tube machinery complex method well known to those skilled in the art, and thus practical operation is easy.Actually add man-hour, also can adopt the bimetal tube machinery complex method of other type.
In the present embodiment, in step 2, adopt hydraulic expanding-forming method base tube 1 and bushing pipe 3 to be complex as a whole, and the concrete hydraulic pressure composite algorithm that adopts carry out compound.
In the present embodiment, the first electrode described in step 3 and described second electrode are cylinder electrode, and described first case and described second case are taper shape and the diameter of the two all reduces from the inside to the outside gradually; Described first case and the second case are all laid in coaxial with described mechanical type metal composite pipe, and described first case and the second case are by coniform shell and the plugging plate composition bottom opening of described coniform shell being carried out to shutoff; The plugging plate of described first case is arranged on the middle part of described first electrode, and has the installing port installed for described first electrode in the middle part of the plugging plate of described first case; The plugging plate of described second case is arranged on the middle part of described second electrode, and has the installing port installed for described second electrode in the middle part of the plugging plate of described second case.
Further, the length of described first electrode and the second electrode is 10mm ~ 150mm.Meanwhile, the plugging plate diameter of described first case is 1.5 times ~ 3 times of described first electrode external diameter, and the plugging plate diameter of described second case is 1.5 times ~ 3 times of described second electrode external diameter.Actually add man-hour, can according to specific needs, the diameter of described first electrode and the length of the second electrode and the plugging plate of described first case and the second case be adjusted respectively.
Before carrying out electric resistance welding preparation in step 3, also need to carry out grinding process respectively on base tube 1 and overhanging section of bushing pipe 3 upper installation site of installing described resistance welding electrode.Specifically respectively grinding process is carried out to the installation site of the first welding tooling 2 on overhanging section of bushing pipe 3 and the second installation site of welding tooling 4 on base tube 1.
In the present embodiment, when grinding process is carried out respectively to the installation site of the first welding tooling 2 on overhanging section of bushing pipe 3 and the second installation site of welding tooling 4 on base tube 1, carry out grinding process within the scope of one end 50mm of the base tube 1 that overhanging section of bushing pipe 3 that installs the first welding tooling 2 and the second welding tooling 4 are installed, the length of described first electrode and the second electrode is all not more than 50mm.
In the present embodiment, the first electrode described in step 3 and described first case processing and fabricating are integrated, and described second electrode and described second case processing and fabricating are integrated.
Described first electrode is identical with the material of described second electrode and its material is copper, cadmium copper, silver-bearing copper, chromium-copper, zirconium copper, chromium silver-bearing copper or chromium magnalium copper.Actually add man-hour, can according to specific needs, the material of the first welding tooling 2 and the second welding tooling 4 be adjusted accordingly.In the present embodiment, the material of described first electrode and described second electrode is red copper.
During actual use, can according to specific needs, the material of described first electrode and described second electrode be adjusted accordingly.
In the present embodiment, in described electric resistance welding frock installation process, need guarantee the first welding tooling 2 and the second welding tooling 4 firm, firmly install, make the first welding tooling 2 with between bushing pipe 3 and the second welding tooling 4 be all reliably connected with between base tube 1, first welding tooling 2 reliably need be connected with two of resistance welder 5 power output end with the second welding tooling 4, but can not carry out any connection between the first welding tooling 2 and the second welding tooling 4.Should be noted: described first welding tooling 2 and the second welding tooling 4 all can not ground connection, and the first welding tooling 2 and the electric power loop between the second welding tooling 4 and two power output ends of resistance welder 5 can not ground connection, the only earthings of casing of resistance welder 5.
In the present embodiment, when adopting resistance welder 5 to weld with bushing pipe 3 base tube 1 in described mechanical type metal composite pipe in step 4, dot welding method is adopted to weld; After welding, the contact surface between described base tube 1 and bushing pipe 3 forms multiple nugget 6.
Correspondingly, described resistance welder 5 is resistance spot weld welding machine.In half metallurgy type metal composite pipe of welding fabrication, the microstructure of base lining contact surface, refers to Fig. 4.Wherein, the contact position between the bossing of each nugget 6 all on base tube 1 inner surface and the bossing on bushing pipe 3 outer surface.
In the present embodiment, when carrying out electric resistance welding in step 4, the first welding tooling 2 is connected with the negative supply output of resistance welder 5, and the second welding tooling 4 is connected with the positive supply output of resistance welder 5.
During actual use, also the first welding tooling 2 can be connected with the positive supply output of resistance welder 5, and the second welding tooling 4 is connected with the negative supply output of resistance welder 5.
Actual when carrying out electric resistance welding, welding current is 150A ~ 30000A, and weld interval and conduction time are not more than 900ms.Further, weld interval is 10ms ~ 900ms.
In the present embodiment, when carrying out electric resistance welding in step 4, welding current is 3500A, and weld interval is 500ms.
During actual welding, can according to specific needs, welding current and weld interval be adjusted accordingly.
Need to execute stressed feature by electrode relative to after the workpiece combination of electric resistance welding spot welding, carry out electric resistance welding method in step 4 and distinguish with conventional resistance spot weld soldering method and be only, without the need to carrying out precompressed to workpiece before energising.Because base tube 1 and bushing pipe 3 carry out mechanical compound in advance, thus effectively can ensure that the Contact of two to-be-welded pieces (i.e. base tube 1 and bushing pipe 3) is good, make whole welding process more simple, realize convenient and welding quality is easy to control.
In the present embodiment, before carrying out following process in step 5, first close resistance welder 5, and the first welding tooling 2 and the second welding tooling 4 are removed.Before pipe end soldering and sealing or pipe end built-up welding are carried out to described half metallurgy type metal composite pipe, endoscopy need be carried out to described half metallurgy type metal composite pipe.Further, pipe end soldering and sealing or pipe end heap postwelding are carried out to described half metallurgy type metal composite pipe, also need at the tube end maching hoop groove of described half metallurgy type metal composite pipe, to facilitate the docking between described half metallurgy type metal composite pipe.After following process completes, also need to carry out radiographic inspection and hydraulic pressure test to described half metallurgy type metal composite pipe finished product.
In the present embodiment, before pipe end soldering and sealing or pipe end built-up welding being carried out to described half metallurgy type metal composite pipe in step 5, sampling inspection need be carried out to described half metallurgy type metal composite pipe, the sampling inspection carried out comprises bond strength inspection and the metal lographic examination of base lining combination interface, and these two inspections are destructive testing.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 2
In the present embodiment, as different from Example 1: process half metallurgy type metal composite pipe finished product specification be Φ 610 × (20+2) mm; The material of base tube 1 described in step one is L485 carbon steel, and the external diameter of base tube 1 is Φ 610mm, length is 3m and its wall thickness is 20mm; The material of described bushing pipe 3 is 316L stainless steel and its wall thickness is 2mm, and the external diameter of described bushing pipe 3 is Φ 560mm and its length is 3.3m; L=150mm described in step 2; In step 4, welding current is 8000A and weld interval is 400ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 1.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 3
In the present embodiment, as different from Example 1: process half metallurgy type metal composite pipe finished product specification be Φ 76 × (7+2) mm; The material of base tube 1 described in step one is 20G carbon steel, and the external diameter of base tube 1 is Φ 76mm, length is 10m and its wall thickness is 7mm; The material of described bushing pipe 3 is 2205 two phase stainless steels and its wall thickness is 2mm, and the external diameter of described bushing pipe 3 is Φ 60mm and its length is 10.16m; L=80mm described in step 2; In step 4, welding current is 14500A and weld interval is 200ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 1.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 4
In the present embodiment, as different from Example 1: process half metallurgy type metal composite pipe finished product specification be Φ 168 × (12.7+3) mm; The material of base tube 1 described in step one is 20G carbon steel, and the external diameter of base tube 1 is Φ 168mm, length is 2m and its wall thickness is 12.7mm; The material of described bushing pipe 3 is 825 nickel-base alloys and its wall thickness is 3mm, and the external diameter of described bushing pipe 3 is Φ 139mm and its length is 2.18m; L=90mm described in step 2; In step 4, welding current is 4800A and weld interval is 350ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 1.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 5
In the present embodiment, as different from Example 1: the material of bushing pipe 3 described in step one is copper alloy, in step 4, welding current is 2500A and weld interval is 400ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 1.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 6
In the present embodiment, as different from Example 1: process half metallurgy type metal composite pipe finished product specification be Φ 60 × (7+2) mm; The material of base tube 1 described in step one is 20G carbon steel, and the external diameter of base tube 1 is Φ 60mm, length is 10m and its wall thickness is 7mm; The material of described bushing pipe 3 is 316L stainless steel and its wall thickness is 2mm, and the external diameter of described bushing pipe 3 is Φ 43mm and its length is 10.4m; L=200mm described in step 2; In step 4, welding current is 20500A and weld interval is 350ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 1.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 7
In the present embodiment, as different from Example 6: the length of described base tube 1 is 0.08m; Described bushing pipe 3 length is 0.11m; L=15mm described in step 2; In step 4, welding current is 150A and weld interval is 550ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 6.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 8
In the present embodiment, as different from Example 2: in step 4, welding current is 5000A and weld interval is 900ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 2.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 9
In the present embodiment, as different from Example 2: in step 4, welding current is 30000A and weld interval is 10ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 2.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 10
In the present embodiment, as different from Example 2: in step 4, welding current is 25000A and weld interval is 60ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 2.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 11
In the present embodiment, as different from Example 2: in step 4, welding current is 20000A and weld interval is 100ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 2.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 12
In the present embodiment, as different from Example 2: in step 4, welding current is 10000A and weld interval is 250ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 2.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
Embodiment 13
In the present embodiment, as different from Example 3: in step 4, welding current is 9500A and weld interval is 700ms.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 3.
In the present embodiment, it is qualified that the result of the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength inspection, the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is, and the bond strength of base lining combination interface all increases more than 5 times than the bond strength of mechanical type metal composite pipe.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every above embodiment is done according to the technology of the present invention essence any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.
Claims (10)
1. adopt electric resistance welding to produce a method for half metallurgy type metal composite pipe, it is characterized in that the method comprises the following steps:
Step one, base tube and bushing pipe are processed: process respectively the base tube (1) of produced metal composite pipe and bushing pipe (3), the length of described bushing pipe (3) is greater than the length of base tube (1);
Step 2, base tube and bushing pipe assemble and mechanical compound: coaxially loaded in base tube (1) by bushing pipe described in step one (3), and make the two ends of bushing pipe (3) all extend out to base tube (1) outside; Adopt bimetal tube machinery complex method base tube (1) and bushing pipe (3) to be complex as a whole again, form mechanical type metal composite pipe; The sections that described bushing pipe (3) two ends extend out to base tube (1) outside is overhanging section;
Step 3, electric resistance welding prepare: two resistance welding electrodes of resistance welder (5) are arranged on described mechanical type metal composite pipe two ends respectively, resistance welding electrode described in one of them is arranged on overhanging section of bushing pipe (3) one end, and resistance welding electrode described in another is arranged on one end of base tube (1);
Step 4, electric resistance welding: adopt resistance welder (5) to weld with bushing pipe (3) the base tube (1) in described mechanical type metal composite pipe, obtain half metallurgy type metal composite pipe;
Step 5: following process: sections bushing pipe (3) in half metallurgy type metal composite pipe described in step 4 being extend out to base tube (1) outside excises, again pipe end soldering and sealing or pipe end built-up welding are carried out to described half metallurgy type metal composite pipe, obtain half metallurgy type metal composite pipe finished product.
2. according to a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe according to claim 1, it is characterized in that: the machinery of bimetal tube described in step 2 complex method is spinning process, hydraulic expanding-forming method or detonation composite algorithm, described in the length L=15mm ~ 200mm of the section of stretching out.
3. according to a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe described in claim 1 or 2, it is characterized in that: in step 3, two described resistance welding electrodes are respectively the first welding tooling (2) and the second welding tooling (4), described first welding tooling (2) forms electric resistance welding frock with the second welding tooling (4) and the two is connected with two power output ends of resistance welder (5) respectively; When carrying out electric resistance welding preparation in step 3, row is put into described resistance welder and installs;
Described first welding tooling (2) comprises the first case that gripping sleeve is contained in the first electrode on overhanging section of bushing pipe (3) and is sleeved on outside described first electrode, described first electrode is laid in coaxial with bushing pipe (3), and the material of described first case is identical with the material of described first electrode; Described second welding tooling (4) comprises the second case that gripping sleeve is contained in the second electrode on base tube (1) and is sleeved on outside described second electrode, described second electrode is laid in coaxial with base tube (1), and the material of described second case is identical with the material of described second electrode.
4. according to a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe according to claim 3, it is characterized in that: described first electrode and described second electrode are cylinder electrode, described first case and described second case are taper shape and the diameter of the two all reduces from the inside to the outside gradually; Described first case and the second case are all laid in coaxial with described mechanical type metal composite pipe, and described first case and the second case are by coniform shell and the plugging plate composition bottom opening of described coniform shell being carried out to shutoff; The plugging plate of described first case is arranged on the middle part of described first electrode, and has the installing port installed for described first electrode in the middle part of the plugging plate of described first case; The plugging plate of described second case is arranged on the middle part of described second electrode, and has the installing port installed for described second electrode in the middle part of the plugging plate of described second case.
5. according to a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe according to claim 3, it is characterized in that: described first electrode and described first case processing and fabricating are integrated, and described second electrode and described second case processing and fabricating are integrated; Described first electrode is identical with the material of described second electrode; The material of described first electrode is copper, cadmium copper, silver-bearing copper, chromium-copper, zirconium copper, chromium silver-bearing copper or chromium magnalium copper.
6. according to a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe described in claim 1 or 2, it is characterized in that: carry out base tube in step 2 and bushing pipe assembles and before mechanical compound, also need to clear up respectively the inner surface of base tube (1) and the outer surface of bushing pipe (3); Before carrying out electric resistance welding preparation in step 3, overhanging section of upper installation site of installing described resistance welding electrode that be upper to base tube (1) and bushing pipe (3) is also needed to carry out grinding process respectively;
Base tube is carried out and bushing pipe assembles and before mechanical compound, also need to carry out blasting treatment to the inner surface of base tube (1) and/or the outer surface of bushing pipe (3) in step 2.
7. according to a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe described in claim 1 or 2, it is characterized in that: when adopting resistance welder (5) to weld with bushing pipe (3) the base tube (1) in described mechanical type metal composite pipe in step 4, adopt dot welding method to weld; After welding, the contact surface between described base tube (1) and bushing pipe (3) is formed multiple nugget (6).
8., according to a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe according to claim 7, it is characterized in that: base tube described in step one (1) is carbon steel base tube, described bushing pipe (3) is corrosion resistant alloy bushing pipe; When carrying out electric resistance welding in step 4, welding current is 150A ~ 30000A.
9. according to a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe described in claim 1 or 2, it is characterized in that: before carrying out following process in step 5, first close resistance welder (5), and the first welding tooling (2) and the second welding tooling (4) are removed; Before pipe end soldering and sealing or pipe end built-up welding being carried out to described half metallurgy type metal composite pipe in step 5, endoscopy need be carried out to described half metallurgy type metal composite pipe; In step 5, pipe end soldering and sealing or pipe end heap postwelding are carried out to described half metallurgy type metal composite pipe, also need at the tube end maching hoop groove of described half metallurgy type metal composite pipe.
10. according to a kind of method adopting electric resistance welding to produce half metallurgy type metal composite pipe described in claim 1 or 2, it is characterized in that: before pipe end soldering and sealing or pipe end built-up welding being carried out to described half metallurgy type metal composite pipe in step 5, need double metallurgy type metal composite pipe to carry out sampling inspection, the sampling inspection carried out comprises bond strength inspection and the metal lographic examination of base lining combination interface; After in step 5, following process completes, also need to carry out radiographic inspection and hydraulic pressure test to described half metallurgy type metal composite pipe finished product.
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