CN108188540A - A kind of CMT welding methods of tubular low-alloy super-high strength steel surface heap copper - Google Patents
A kind of CMT welding methods of tubular low-alloy super-high strength steel surface heap copper Download PDFInfo
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- CN108188540A CN108188540A CN201711348183.6A CN201711348183A CN108188540A CN 108188540 A CN108188540 A CN 108188540A CN 201711348183 A CN201711348183 A CN 201711348183A CN 108188540 A CN108188540 A CN 108188540A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting 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
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of CMT welding methods of tubular low-alloy super-high strength steel surface heap copper, method and step is as follows：(1) low-alloy super-high strength steel workpiece to be welded is processed：It is processed into tubular workpiece to be welded；(2) part to be welded and welding wire are cleared up：It with acetone and brushing part to be welded and welding wire surface, degreases, iron rust, burr dirt, polishing when necessary confirms zero defect in the range of welding position and its 20mm until exposing part to be welded metallic luster；(3) part to be welded is positioned：Using tooling, the tubular part to be welded after cleaning is fixed, and part to be welded is made to be maintained at horizontal position, the corresponding position sprinkling water-soluble quenching liquid that inner cavity is welded with outer wall surface.The present invention reduces human factor and process procedure, effectively improves production efficiency and obtain stable welding quality, and property of welded joint meets requirement of the product in terms of manufacture, transport, storage and safe handling.
Description
Technical field
The invention belongs to metal argon arc welding connection technology fields, and in particular to a kind of tubular low-alloy super-high strength steel surface heap
The CMT welding methods of copper.
Background technology
With the development of industry, the application of steel is increasingly extensive, the steel such as 35CrMnSiA, 50SiMnVB, 45CrNiMo1VA
Material is widely applied in product design, while welding technique is also constantly used in product design, facilitates utilization
Welding manner makes copper and Cu alloy material realize seamless connection with steel matrix.Unimach carbon equivalent is higher, in addition alloy is first
The effect of element, the heat sensitivity of steel is high, and tendency of hardenability increase, solderability is poor, and postwelding is susceptible to cold crack etc. and seriously welds
High 45CrNiMo1VA steel itself the quenching degree height of defect, especially Alloy Elements Mo content, tendency of hardenability bigger, solderability is more
Difference, it is easier to generate cold crack；The features such as copper and fast copper alloy heat conduction itself, increases copper steel welding difficulty, together to a certain extent
When control the requirement of layers of copper fusion penetration, should also reduce the thermal weld stress in welding process to the greatest extent, reduce heat diffusion to matrix
It can influence.For the above situation, domestic and international researcher has been carried out using arc surfacing technology in steel matrix surface deposited metal copper early period
Technical study, but since arc surfacing is using matrix as an electrode, and since electric arc heated temperature is high and heat input
Inhomogeneities, matrix easily melts scaling loss, and postwelding properties of product reduce more, become the technological difficulties for influencing bead-welding technology.
In recent years, some domestic researchers are using deposit welding and founding deposition in strip surfacing, sensing deposit welding, gas shield continuous oven
The methods of weldering, realizes no fusion penetration surface deposited metal, but deposition techniques are relatively complicated, less efficient；And CMT welding techniques are to be based on
A kind of new welding technology of metal argon arc welding is after the starting the arc with the fundamental difference of metal argon arc welding when welding wire molten drop
Transition is extinguished rapidly with electric arc during workpiece short circuit, while welding wire pumpback, and subsequent oil re-strikes, moves in circles, and formation reliably connects
It connects, although its thermal weld stress amount is relatively low, it influences substrate performance there are still certain.How could be simply and easily super
High-strength steel matrix surface arc surfacing layers of copper is unlikely to influence steel matrix property itself while realizing very high strength metallurgical binding again
Can, it becomes as urgent problem to be solved.Therefore, a kind of CMT welding methods of tubular low-alloy super-high strength steel surface heap copper are invented
With certain necessity and actuality.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind simply and easily in super-high strength steel matrix
Surface deposited metal layers of copper, being unlikely to again while realizing very high strength metallurgical binding, which influences steel matrix performance itself, good mechanics
Performance meets the CMT welding methods of the tubular low-alloy super-high strength steel surface heap copper of product design requirement.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of tubular low-alloy super-high strength steel surface
The CMT welding methods of heap copper, method and step are as follows：
(1) low-alloy super-high strength steel workpiece to be welded is processed：It is processed into tubular workpiece to be welded；
(2) part to be welded and welding wire are cleared up：With acetone and brushing part to be welded and welding wire surface, degrease, iron rust, burr
Dirt, when necessary polishing confirm zero defect in the range of welding position and its 20mm until exposing part to be welded metallic luster；
(3) part to be welded is positioned：Using tooling, the tubular part to be welded after cleaning is fixed, and part to be welded is made to be maintained at water
Prosposition is put, the corresponding position sprinkling water-soluble quenching liquid that inner cavity is welded with outer wall surface；
(4) part to be welded is welded：Using leftward welding, carry out automatic CMT heaps brazing in the welding surface of part to be welded and connect, control welding gun angle
Spend α, welding position and welding wire angle；Angle of welding gun α is the tangential direction of welding position and the angle of welding gun, and angle of welding gun α is
83 °~87 °；Welding position determines by the angle β between the diameter by workpiece peak and the diameter for passing through current solder joint,
It it is 5 °~7 ° by the diameter of workpiece peak and by the angle β between current spot size；Electrode extension is 10mm
~15mm;
(5) detect：Weld seam is detected using magnaflux, visual observations are without pit, undercut defect；After machine adds, face of weld is not permitted
Permitted have crackle, stomata；Layers of copper and steel layer interface are clear, and layers of copper penetration depth is no more than 0.2mm;
The low-alloy super-high strength steel material trademark be 35CrMnSiA, 50SiMnVB, 45CrNiMo1VA, wherein 50SiMnVB's
Chemical composition：C 0.47%~0.52%, Si 1.35%~1.70%, Mn 0.95%~1.30%, Cr 0.15%~0.35%, V
0.02%~0.06%, B 0.0005%~0.0035%；The chemical composition of 45CrNiMo1VA：C 0.42%~0.48%, Si 0.15%
~0.35%, Mn 0.60%~0.90%, Cr 0.90%~1.02%, Ni 0.40%~0.70%, Mo 0.90%~1.10%, V
0.05%~0.10%, S≤0.015%, P≤0.015%；The outer diameter for being processed into cylindrical work pieces is 120mm~160mm, and wall thickness is
8mm~12mm, length are no less than 200mm.
When the part to be welded material is 35CrMnSiA, 50SiMnVB, corresponding position that inner cavity is welded with outer wall surface
Put sprinkling water-soluble quenching liquid, flow is 180L/min~210L/min, a concentration of 15%~18%.
The welding wire selects HSCu, a diameter of 1.0mm~1.2mm；Welding parameter：Gas flow is 10L/min~15L/
Min, purity of argon 99.99%, welding current are 140A~180A, and weldingvoltage is 12V~16V, speed of welding 200mm/
Min~220mm/min, DC reverse connection.
Advantageous effect of the present invention：Heat input is extremely low in welding process, and heat affected area is small, welding dissimilar materials interface point
Bright, regular, no scaling loss for using quenching liquid cooling down workpiece, while reducing thermal weld stress amount, is further reduced sweating heat
Influence of the input process to steel matrix performance, improves that steel matrix easily melts scaling loss when heap brazing connects and performance is greatly lowered
Situation, making matrix, copper diffusing capacity into matrix is less and uniform almost without fusing, diffusion depth be no more than 0.2 mm, smelting
The defects of golden bond strength is high, disclosure satisfy that product quality requirement, the layers of copper surface flawless of built-up welding, stomata, base steel side without
Contamination cracking.The present invention reduces human factor and process procedure, effectively improves production efficiency and obtain stable welding quality,
Property of welded joint meets requirement of the product in terms of manufacture, transport, storage and safe handling；Welding point has anti-load simultaneously
The welding performance of lotus reaches the influence for bearing gun pressure, inertia force institute stress, meets the actual operation requirements of product.
Description of the drawings
Fig. 1 is schematic diagram of the copperwelding rod of the present invention when part to be welded surface carries out built-up welding（Label 1 is part to be welded in attached drawing,
Label 2 is weld seam, and label 3 is welding gun）；
Location diagrams of the Fig. 2 between welding gun of the present invention, part to be welded three（Label 1 is part to be welded in attached drawing, and label 2 is weldering
Seam, label 3 are welding gun）.
Specific embodiment
Several specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.As shown in Figs. 1-2：It is a kind of
G50 material penetration shells heat-treatment technology methods, method and step are as follows：
Specific embodiment one：
As illustrated in fig. 1 and 2, which is the CMT welding in low-alloy super-high strength steel cylindrical body surface heap copper, using certainly
Dynamic CMT welding carries out disposable built-up welding, and main process is as follows：
(1) step processes part to be welded material as 50SiMnVB（Chemical composition：C 0.47%~0.52%, Si 1.35%~1.70%, Mn
0.95%~1.30%, Cr 0.15%~0.35%, V 0.02%~0.06%, B 0.0005%~0.0035%）；It is processed into tubular work
The outer diameter of part is 120mm~160mm, wall thickness 8mm, length 215mm；
(2) step clears up part to be welded and welding wire：With acetone and brushing part to be welded and welding wire surface, degrease, iron rust,
Burr dirt, when necessary polishing confirm zero defect in the range of welding position and its 20mm until exposing part to be welded metallic luster；
(3) step positions part to be welded：Using tooling, the tubular part to be welded after cleaning is fixed, and keep part to be welded
In horizontal position, water-soluble quenching liquid, flow 200L/min are sprayed in inner cavity with the corresponding position that outer wall surface is welded
~210L/min, a concentration of 15%~18%；
(4) step welds part to be welded：Using leftward welding, carry out automatic CMT heaps brazing in the welding surface of part to be welded and connect, welding wire choosing
With HSCu, a diameter of 1.0mm~1.2mm；Welding parameter：Gas flow is 10L/min~15L/min, and purity of argon is
99.99%, welding current is 160A~180A, and weldingvoltage is 14V~16V, and speed of welding is 200 mm/min~220mm/
Min, DC reverse connection, control angle of welding gun α, welding position and welding wire angle；Angle of welding gun α be welding position tangential direction with
The angle of welding gun, angle of welding gun α are 83 °~87 °；Welding position is by the diameter by workpiece peak and passes through current solder joint
Angle β between diameter determines, by the diameter of workpiece peak and by the angle β between current spot size for 5 °~
7°；Electrode extension is 10mm~15mm；
(5) step detects：Weld seam is detected using magnaflux, visual observations are without pit, undercut defect；After machine adds, face of weld
It is not allow for crackle, stomata；Layers of copper and steel layer interface are clear, and layers of copper penetration depth is no more than 0.2mm.
Specific embodiment two：
As illustrated in fig. 1 and 2, which is the CMT welding in low-alloy super-high strength steel cylindrical body surface heap copper, using certainly
Dynamic CMT welding carries out disposable built-up welding, and main process is as follows：
(1) step processes part to be welded material as 35CrMnSiA；The outer diameter for being processed into cylindrical work pieces is 120mm~160mm, and wall thickness is
11mm, length 215mm；
(2) step clears up part to be welded and welding wire：With acetone and brushing part to be welded and welding wire surface, degrease, iron rust,
Burr dirt, when necessary polishing confirm zero defect in the range of welding position and its 20mm until exposing part to be welded metallic luster；
(3) step positions part to be welded：Using tooling, the tubular part to be welded after cleaning is fixed, and keep part to be welded
In horizontal position, water-soluble quenching liquid, flow 200L/min are sprayed in inner cavity with the corresponding position that outer wall surface is welded
~210L/min, a concentration of 15%~18%；
(4) step welds part to be welded：Using leftward welding, carry out automatic CMT heaps brazing in the welding surface of part to be welded and connect, welding wire choosing
With HSCu, a diameter of 1.0mm~1.2mm；Welding parameter：Gas flow is 10L/min~15L/min, and purity of argon is
99.99%, welding current is 160A~180A, and weldingvoltage is 14V~16V, and speed of welding is 200 mm/min~220mm/
Min, DC reverse connection, control angle of welding gun α, welding position and welding wire angle；Angle of welding gun α be welding position tangential direction with
The angle of welding gun, angle of welding gun α are 83 °~87 °；Welding position is by the diameter by workpiece peak and passes through current solder joint
Angle β between diameter determines, by the diameter of workpiece peak and by the angle β between current spot size for 5 °~
7°；Electrode extension is 10mm~15mm；
(5) step detects：Weld seam is detected using magnaflux, visual observations are without pit, undercut defect；After machine adds, face of weld
It is not allow for crackle, stomata；Layers of copper and steel layer interface are clear, and layers of copper penetration depth is no more than 0.2mm.
Specific embodiment three：
As illustrated in fig. 1 and 2, which is the CMT welding in low-alloy super-high strength steel cylindrical body surface heap copper, using certainly
Dynamic CMT welding carries out disposable built-up welding, and main process is as follows：
(1) step processes part to be welded material as 45CrNiMo1VA（Chemical composition：C 0.42%~0.48%, Si 0.15%~
0.35%, Mn 0.60%~0.90%, Cr 0.90%~1.02%, Ni 0.40%~0.70%, Mo 0.90%~1.10%, V 0.05%
~0.10%, S≤0.015%, P≤0.015%）；The outer diameter of cylindrical work pieces is processed into as 120mm~160mm, wall thickness 11mm,
Length is 215mm；
(2) step clears up part to be welded and welding wire：With acetone and brushing part to be welded and welding wire surface, degrease, iron rust,
Burr dirt, when necessary polishing confirm zero defect in the range of welding position and its 20mm until exposing part to be welded metallic luster；
(3) step positions part to be welded：Using tooling, the tubular part to be welded after cleaning is fixed, is maintained at part to be welded
Horizontal position, inner cavity should not spray water-soluble quenching liquid with the corresponding position that outer wall surface is welded；
(4) step welds part to be welded：Using leftward welding, carry out automatic CMT heaps brazing in the welding surface of part to be welded and connect, welding wire choosing
With HSCu, a diameter of 1.0mm~1.2mm；Welding parameter：Gas flow is 10L/min~15L/min, and purity of argon is
99.99%, welding current is 140A~150A, and weldingvoltage is 12V~14V, and speed of welding is 200 mm/min~220mm/
Min, DC reverse connection, control angle of welding gun α, welding position and welding wire angle；Angle of welding gun α be welding position tangential direction with
The angle of welding gun, angle of welding gun α are 83 °~87 °；Welding position is by the diameter by workpiece peak and passes through current solder joint
Angle β between diameter determines, by the diameter of workpiece peak and by the angle β between current spot size for 5 °~
7°；Electrode extension is 10mm~15mm；
(5) step detects：Weld seam is detected using magnaflux, visual observations are without pit, undercut defect；After machine adds, face of weld
It is not allow for crackle, stomata；Layers of copper and steel layer interface are clear, and layers of copper penetration depth is no more than 0.2mm.
Specific embodiment four：
As illustrated in fig. 1 and 2, which is the CMT welding in low-alloy super-high strength steel cylindrical body surface heap copper, using certainly
Dynamic CMT welding carries out disposable built-up welding, and main process is as follows：
(1) step processes part to be welded material as 45CrNiMo1VA（Chemical composition：C 0.42%~0.48%, Si 0.15%~
0.35%, Mn 0.60%~0.90%, Cr 0.90%~1.02%, Ni 0.40%~0.70%, Mo 0.90%~1.10%, V 0.05%
~0.10%, S≤0.015%, P≤0.015%）；The outer diameter for being processed into cylindrical work pieces is 120mm~160mm, wall thickness 8mm, is grown
It spends for 215mm；
(2) step clears up part to be welded and welding wire：With acetone and brushing part to be welded and welding wire surface, degrease, iron rust,
Burr dirt, when necessary polishing confirm zero defect in the range of welding position and its 20mm until exposing part to be welded metallic luster；
(3) step positions part to be welded：Using tooling, the tubular part to be welded after cleaning is fixed, is maintained at part to be welded
Horizontal position, inner cavity should not spray water-soluble quenching liquid with the corresponding position that outer wall surface is welded；
(4) step welds part to be welded：Using leftward welding, carry out automatic CMT heaps brazing in the welding surface of part to be welded and connect, welding wire choosing
With HSCu, a diameter of 1.0mm~1.2mm；Welding parameter：Gas flow is 10L/min~15L/min, and purity of argon is
99.99%, welding current is 140A~150A, and weldingvoltage is 12V~14V, and speed of welding is 200 mm/min~220mm/
Min, DC reverse connection, control angle of welding gun α, welding position and welding wire angle；Angle of welding gun α be welding position tangential direction with
The angle of welding gun, angle of welding gun α are 83 °~87 °；Welding position is by the diameter by workpiece peak and passes through current solder joint
Angle β between diameter determines, by the diameter of workpiece peak and by the angle β between current spot size for 5 °~
7°；Electrode extension is 10mm~15mm；
(5) step detects：Weld seam is detected using magnaflux, visual observations are without pit, undercut defect；After machine adds, face of weld
It is not allow for crackle, stomata；Layers of copper and steel layer interface are clear, and layers of copper penetration depth is no more than 0.2mm.
Claims (4)
1. a kind of CMT welding methods of tubular low-alloy super-high strength steel surface heap copper, method and step are as follows：
(1) low-alloy super-high strength steel workpiece to be welded is processed：It is processed into tubular workpiece to be welded；
(2) part to be welded and welding wire are cleared up：With acetone and brushing part to be welded and welding wire surface, degrease, iron rust, burr
Dirt, when necessary polishing confirm zero defect in the range of welding position and its 20mm until exposing part to be welded metallic luster；
(3) part to be welded is positioned：Using tooling, the tubular part to be welded after cleaning is fixed, and part to be welded is made to be maintained at water
Prosposition is put, the corresponding position sprinkling water-soluble quenching liquid that inner cavity is welded with outer wall surface；
(4) part to be welded is welded：Using leftward welding, carry out automatic CMT heaps brazing in the welding surface of part to be welded and connect, control welding gun angle
Spend α, welding position and welding wire angle；Angle of welding gun α is the tangential direction of welding position and the angle of welding gun, and angle of welding gun α is
83 °~87 °；Welding position determines by the angle β between the diameter by workpiece peak and the diameter for passing through current solder joint,
It it is 5 °~7 ° by the diameter of workpiece peak and by the angle β between current spot size；Electrode extension is 10mm
~15mm；
(5) detect：Weld seam, the defects of visual observations are without pit, undercut, are detected using magnaflux；After machine adds, face of weld is not
Allow have crackle, stomata；Layers of copper and steel layer interface are clear, and layers of copper penetration depth is no more than 0.2mm.
2. a kind of CMT welding methods of tubular low-alloy super-high strength steel surface heap copper according to claim 1, feature exist
In：The low-alloy super-high strength steel material trademark be 35CrMnSiA, 50SiMnVB, 45CrNiMo1VA, wherein 50SiMnVB's
Chemical composition：C 0.47%~0.52%, Si 1.35%~1.70%, Mn 0.95%~1.30%, Cr 0.15%~0.35%, V
0.02%~0.06%, B 0.0005%~0.0035%；The chemical composition of 45CrNiMo1VA：C 0.42%~0.48%, Si 0.15%
~0.35%, Mn 0.60%~0.90%, Cr 0.90%~1.02%, Ni 0.40%~0.70%, Mo 0.90%~1.10%, V
0.05%~0.10%, S≤0.015%, P≤0.015%；The outer diameter for being processed into cylindrical work pieces is 120mm~160mm, and wall thickness is
8mm~12mm, length are no less than 200mm.
3. a kind of CMT welding methods of tubular low-alloy super-high strength steel surface heap copper according to claim 1, feature exist
In：When the part to be welded material is 35CrMnSiA, 50SiMnVB, inner cavity is sprayed with the corresponding position that outer wall surface is welded
Spilling water-soluble quenching liquid, flow is 180L/min~210L/min, a concentration of 15%~18%.
4. a kind of CMT welding methods of tubular low-alloy super-high strength steel surface heap copper according to claim 1, feature exist
In：The welding wire selects HSCu, a diameter of 1.0mm~1.2mm；Welding parameter：Gas flow be 10L/min~15L/min, argon
Gas purity is 99.99%, and welding current is 140A~180A, and weldingvoltage is 12V~16V, and speed of welding is 200 mm/min
~220mm/min, DC reverse connection.
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| CN110315173A (en) * | 2019-06-12 | 2019-10-11 | 河南北方红阳机电有限公司 | A kind of local multidirectional corner connection TIG weld method of thin-walled super-high strength steel |
| CN112594254A (en) * | 2020-12-24 | 2021-04-02 | 中钢集团西安重机有限公司 | Positioning sleeve of mud beating mechanism and preparation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108823367A (en) * | 2018-07-04 | 2018-11-16 | 河南北方红阳机电有限公司 | A kind of thinning processing method for being organized at super-high strength steel deposit welding rear joint |
| CN110315173A (en) * | 2019-06-12 | 2019-10-11 | 河南北方红阳机电有限公司 | A kind of local multidirectional corner connection TIG weld method of thin-walled super-high strength steel |
| CN112594254A (en) * | 2020-12-24 | 2021-04-02 | 中钢集团西安重机有限公司 | Positioning sleeve of mud beating mechanism and preparation method |
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