CN105643050A - Single-side multiple-wire submerged-arc welding method of low-temperature and high-ductility steel - Google Patents
Single-side multiple-wire submerged-arc welding method of low-temperature and high-ductility steel Download PDFInfo
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- CN105643050A CN105643050A CN201610110926.5A CN201610110926A CN105643050A CN 105643050 A CN105643050 A CN 105643050A CN 201610110926 A CN201610110926 A CN 201610110926A CN 105643050 A CN105643050 A CN 105643050A
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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
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
- B23K9/188—Submerged-arc welding making use of a consumable electrodes making use of several electrodes
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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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/035—Seam welding; Backing means; Inserts with backing means disposed under the seam
- B23K9/0356—Seam welding; Backing means; Inserts with backing means disposed under the seam the backing means being a tape or strip
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Abstract
Disclosed is a single-side multiple-wire submerged-arc welding method of low-temperature and high-ductility steel. The method comprises the following steps that S100, the low-temperature and high-ductility steel is provided, wherein the carbon equivalent (Cep) of the low-temperature and high-ductility steel is smaller than or equal to 0.33%, and the mass fraction of the Al element of the low-temperature and high-ductility steel is smaller than or equal to 0.01%; S200, a single-side Y-shaped groove is formed in the portion of butt joint of two pieces of low-temperature and high-ductility steel; and S300, a plurality of submerged-arc welding wires are used for welding in the Y-shaped groove, and therefore the two pieces of low-temperature and high-ductility steel can be connected. By the adoption of the method, due to the facts that the single-side Y-shaped groove is formed in the portion of butt joint of the two pieces of low-temperature and high-ductility steel with the features that the Cep is smaller than or equal to 0.33% and the mass fraction of the Al element is smaller than or equal to 0.01%, and the two pieces of low-temperature and high-ductility steel can be stably spliced by use of the submerged-arc welding wires, compared with the prior art, the method has the advantages that the welded low-temperature and high-ductility steel has good impact toughness, turnover treatment does not need to be conducted on the low-temperature and high-ductility steel in the welding process, and the welding efficiency is high.
Description
Technical field
The invention belongs to long strands field, be specifically related to the one side multi-wire submerged-arc welding method of a kind of low-temperature high-toughness steel.
Background technology
Two-sided monofilament submerged-arc welding is mainly adopted when shipbuilding industry keeps flat splicing for low-temperature high-toughness steel. This low-temperature high-toughness steel currently mainly adopts normalizing or TMCP technique to carry out smelting rolling. One side or double open groove before a splice, first carries out monofilament submerged arc welding from one side, and root carries out after standing up defect cleaning, then adopts the welding that monofilament submerged-arc welding completes second. Two-sided monofilament submerged-arc welding is typically necessary stands up twice, and it would furthermore be possible to need certain root to process the time, whole efficiency is not high, and for the welding of thicker low-temperature high-toughness steel, the layer number of channels of weld seam is more, and efficiency is lower.
If it is considered that adopt other technique, such as two-sided double wire hidden arc welding, although can reduce the layer number of channels of weld seam, but need also exist for standing up twice, and two-sided double wire hidden arc welding heat input is big, and the impact flexibility of the low-temperature high-toughness steel after welding can not meet code requirement; If adopting one side multiplewire submerged arc welding, it may not be necessary to standing up and carry out the welding of the root back side, but existing low-temperature high-toughness steel is carrying out the multi-wire submerged-arc postwelding that heat input is very high, the impact flexibility of low-temperature high-toughness steel can not meet requirement equally.
Summary of the invention
It is an object of the invention to provide the one side multi-wire submerged-arc welding method of a kind of low-temperature high-toughness steel, the technical problem low to solve welding efficiency.
For reaching this purpose, the present invention by the following technical solutions:
The one side multi-wire submerged-arc welding method of a kind of low-temperature high-toughness steel is provided, comprises the following steps:
S100, a kind of low-temperature high-toughness steel of offer, carbon equivalent Cep��0.33% of described low-temperature high-toughness steel, mass fraction��0.01% of Al element;
S200, offer one side Y-shaped groove at the joint of two blocks of described low-temperature high-toughness steel;
S300, adopt many submerged-arc welding wires to weld at described Y-shaped groove place, two blocks of described low-temperature high-toughness steel can be connected.
Beneficial effects of the present invention: the present invention is by offering one side Y-shaped groove at the joint of two pieces of carbon equivalent Cep��0.33%, the low-temperature high-toughness steel of Al element mass fraction��0.01%, many submerged-arc welding wires are adopted stably to be spliced by two blocks of low-temperature high-toughness steel, compared with prior art, low-temperature high-toughness steel after welding has good impact flexibility, low-temperature high-toughness steel need not be stood up process by welding process, and welding can complete the welding of whole joint together, welding efficiency is high.
Accompanying drawing explanation
Fig. 1 is the schematic diagram before the low-temperature high-toughness steel welding of the embodiment of the present invention.
Fig. 2 is the schematic diagram after the low-temperature high-toughness steel welding of the embodiment of the present invention.
Fig. 3 be three submerged-arc welding wires of the embodiment of the present invention position view is set.
Fig. 4 is the schematic diagram after the low-temperature high-toughness steel lower end of the embodiment of the present invention is provided with copper lining and the first solder flux.
In Fig. 1��4:
1, low-temperature high-toughness steel; 11, Y-shaped groove; 2, weld seam; 3, the first submerged-arc welding wire; 4, the second submerged-arc welding wire; 5, the 3rd submerged-arc welding wire; 6, copper lining; 7, the first solder flux.
Detailed description of the invention
Below in conjunction with accompanying drawing 1��4 and further illustrate technical scheme by specific embodiment.
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term " thickness ", " width " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second ", " the 3rd " are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic. Thus, define " first ", " second ", the feature of " the 3rd " can express or implicitly include one or more these features.
In describing the invention, unless otherwise clearly defined and limited, term " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or integral; Can be mechanically connected, it is also possible to be electrical connection; Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be the interaction relationship of the connection within two block parts or two block parts. For the ordinary skill in the art, it is possible to concrete condition understands above-mentioned term concrete meaning in the present invention.
The one side multi-wire submerged-arc welding method of the low-temperature high-toughness steel that embodiments of the invention provide comprises the following steps:
S100, a kind of low-temperature high-toughness steel 1 of offer, carbon equivalent Cep��0.33% of described low-temperature high-toughness steel 1, mass fraction��0.01% of Al element;
In the present embodiment, the thickness of low-temperature high-toughness steel 1 is 31mm, its carbon equivalent Cep=C+Mn/6+ (Cr+Mo+V)/5+ (Ni+Cu)/15, by controlling carbon equivalent Cep��0.33% of low-temperature high-toughness steel 1, and mass fraction��0.01% of Al element, making low-temperature high-toughness steel 1 can bear higher heat input when adopting multiplewire submerged arc welding to weld, the low-temperature high-toughness steel after welding has good impact flexibility, and its impact flexibility meets industry standard requirement.
The present embodiment does not have concrete restriction for " low temperature ", " high tenacity " in " low-temperature high-toughness steel ", when the examination temperature controlling steel is-40 DEG C or following, and when impact value meets industry standard, by its called after low-temperature high-toughness steel.
S200, offer one side Y-shaped groove 11 at the joint of two blocks of described low-temperature high-toughness steel 1;
Adopting described low-temperature high-toughness steel is mother metal, offers one side Y-shaped groove at its joint, and when welding, the groove back side arranges copper lining and solder flux, sealing run molding can be assisted, then mother metal need not be stood up process, eliminate the operation stood up, improve welding efficiency.
S300, adopt many submerged-arc welding wires to weld at described Y-shaped groove 11 place, two blocks of described low-temperature high-toughness steel 1 successfully can be docked;
The basis of described low-temperature high-toughness steel 1 and one side Y-shaped groove 11 can adopt many submerged-arc welding wires weld.
Described low-temperature high-toughness steel 1 is smelted through deoxidation, TMCP PROCESS FOR TREATMENT prepares, and the deoxidizer that described deoxidation metallurgy adopts is Ti element. Adopt Ti element to carry out deoxidation treatment as deoxidizer in the deoxidation metallurgy process of low-temperature high-toughness steel 1, described low-temperature high-toughness steel can be prepared. TMCP technique is prior art, does not repeat them here.
Adopt above-mentioned welding method that low-temperature high-toughness steel carries out splicing welding, low-temperature high-toughness steel after welding has good impact flexibility, low-temperature high-toughness steel need not standing up in welding process process, and welding can complete the welding of whole joint together, welding efficiency is high.
As the preferred embodiment of the present invention, controlling carbon equivalent Cep��0.33%, under the premise of mass fraction��0.01% of Al element, in parts by weight, low-temperature high-toughness steel 1 also comprises following component:
C:0.05%��0.10%, Si:0.15%��0.30%, Mn:1.30%��1.50%, P :��0.02%, S :��0.01%, Ni :��0.20%, Nb :��0.03%, V :��0.02%, Cu :��0.02%, Mo :��0.10%;
The present embodiment is by being defined the content of C, Si, Mn, P, S, Ni, Nb, V, Cu and Mo element, it is possible to the impact flexibility after making low-temperature high-toughness steel 1 meet multiplewire submerged arc welding welding further.
As the another preferred embodiment of the present invention, described step S300 specifically includes following steps:
S300a: the side deviating from described Y-shaped groove 11 at described low-temperature high-toughness steel 1 arranges copper lining 6, between described copper lining 6 and described low-temperature high-toughness steel 1, lay the first solder flux 7 covering described Y-shaped groove 11, fill the second solder flux (not shown) at described groove place;
On the one hand, copper lining 6 can bear certain pressure, and after temperature distortion, also easily correction reuses; On the other hand, arranging of copper lining 6 can make solder flux 7 and low-temperature high-toughness steel 1 fit, and makes the surfacing of the low-temperature high-toughness steel 1 after welding; The bottom of the copper lining 6 in the present embodiment is additionally provided with the air bag by air pressure adjustment copper lining 6 height, makes the copper lining 6 in welding process be close to low-temperature high-toughness steel 1 all the time, it is ensured that the stability of sealing run molding.
First solder flux 7 is for making the back side welding fabrication of low-temperature high-toughness steel, it is possible to avoids lack of penetration and pore occur on the weld seam 2 when welding, affects welding quality; Second solder flux is for filling groove and making the front surface welding fabrication of low-temperature high-toughness steel.
The model of the first solder flux 7 in the present embodiment is NSH-1RM, and the model of the second solder flux is NSH-50ER.
S300b: the groove center that many described submerged-arc welding wire intervals are placed in described Y-shaped groove 11 is welded;
Many described submerged-arc welding wire intervals are placed in the groove center of described Y-shaped groove 11, the weld seam on low-temperature high-toughness steel 1 can be avoided when welding to offset, affect welding effect.
The width of described first solder flux 7 is 90��110mm, and the thickness of the first solder flux 7 is 4��6mm, the widthwise central of described first solder flux 7 just gap center to described Y-shaped groove 11; By arrange suitable width, thickness the first solder flux 7 between copper lining 6 and low-temperature high-toughness steel 1, it is ensured that the weld seam 2 after welding is attractive in appearance. The width of the solder flux 7 in the present embodiment is 100mm, and the thickness of the first solder flux 7 is 5mm.
The bevel angle a of described Y-shaped groove 11 is 42��48 ��, is avoided that weld seam 2 is wide on the one hand, makes two blocks of low-temperature high-toughness steel 1 stably be stitched together on the other hand, and has good impact flexibility; Bevel angle a in the present embodiment is preferably 45 ��.
Preferably, the root face height h of described Y-shaped groove 11 is 5��7mm, and root face refers to when single groove offered by low-temperature high-toughness steel, the not bevelled end face part of thickness direction along low-temperature high-toughness steel, can ensure that one weld seam energy through welding near copper lining 6, prevent root from burning simultaneously; The root face height h of the Y-shaped groove 11 in the present embodiment is 6mm.
Preferably, the gap m between the root face of two blocks of described low-temperature high-toughness steel 1 is 0��1mm, to prevent two blocks of described low-temperature high-toughness steel 1 burn-through when welding; Gap m in the present embodiment is 0.5mm.
The bevel angle a of Y-shaped groove in the present embodiment, at least two in root face height h and gap m limit situation can combination in any, to improve welding effect further. As further preferred embodiment of the present invention, the bevel angle a in the present embodiment is 45 ��, root face height h be the gap m between 6mm, root face is 0.5mm.
Welding current when two blocks of low-temperature high-toughness steel 1 weld is 1200��1400A, and arc voltage is 34��12V, and speed of welding is 45��55cm/min, and heat input is 160��200KJ/cm. Difference being arranged to the submerged-arc welding wire of position, welding current, arc voltage required during its welding are all different. Welding parameter: welding current is 1200��1400A, arc voltage is 34��12V, speed of welding is 45��55cm/min, heat input is 160��200KJ/cm, the specific parameter being adopt one side multiplewire submerged arc welding for low-temperature high-toughness steel 1 and set, can make weld seam 2 once complete according to this welding parameter, will not leave crator, overlap etc. on weld seam 2, save the grinding process time, improve welding efficiency. For the splicing submerged-arc welding of the low-temperature high-toughness steel 1 after 31mm in the present embodiment, the welding current adopted can be 1220A, 1360A, and arc voltage can be 35V, 40V, and speed of welding is 50cm/min, and heat input is 180KJ/cm.
As the present invention another preferred embodiment, the quantity of submerged-arc welding wire is three, respectively the first submerged-arc welding wire 3, second submerged-arc welding wire 4, 3rd submerged-arc welding wire 5, three described submerged-arc welding wire intervals successively are placed in the groove center of described Y-shaped groove 11, wherein, second submerged-arc welding wire 4 is arranged between the first submerged-arc welding wire 3 and the 3rd submerged-arc welding wire 5, distance R1 between welding ends and the welding ends of described second submerged-arc welding wire 4 of described first submerged-arc welding wire 3 is 30��40mm, distance R2 between welding ends and the welding ends of described 3rd submerged-arc welding wire 5 of described second submerged-arc welding wire 4 is 110��140mm.
The purposes of three submerged-arc welding wires is different, and the position of setting also differs. Wherein, distance R1 between welding ends and the welding ends of the second submerged-arc welding wire 4 of the first submerged-arc welding wire 3 is 30��40mm, distance R2 between welding ends and the welding ends of the 3rd submerged-arc welding wire of the second submerged-arc welding wire is 110��140mm, first submerged-arc welding wire 3 is for ensureing the bead formed on back of the groove of low-temperature high-toughness steel 1, second submerged-arc welding wire 4 is in order to fill groove, and the 3rd submerged-arc welding wire 5 is in order to ensure the front surface molding of the groove of low-temperature high-toughness steel 1. Preferably, distance R1 between welding ends and the welding ends of the second submerged-arc welding wire 4 of the first submerged-arc welding wire 3 in the present embodiment is 35mm, distance R2 between welding ends and the welding ends of the 3rd submerged-arc welding wire of the second submerged-arc welding wire is 120mm, crator, overlap will not be left on weld seam 2 during welding, there is good welding effect.
In order to improve welding effect further, the angle that arranges of three submerged-arc welding wires is optimized by above-mentioned three spaced bases of submerged-arc welding wire, wherein, second submerged-arc welding wire 4 is perpendicular to the surface of described low-temperature high-toughness steel 1, angle x between described first submerged-arc welding wire 3 and described second submerged-arc welding wire 4 is 12��16 ��, the angle of the first submerged-arc welding wire 3 need not be changed during welding, it is ensured that the first submerged-arc welding wire 3 penetrates root face when welding, improve welding stability; Second submerged-arc welding wire 4 is perpendicular to the surface of low-temperature high-toughness steel 1, need not change the angle of the second submerged-arc welding wire 4 during welding, it is possible to makes the second submerged-arc welding wire 4 intactly fill groove, facilitates the welding of the 3rd follow-up submerged-arc welding wire 5; Angle y between described second submerged-arc welding wire 4 and described 3rd submerged-arc welding wire 5 is 4��6 ��, need not change the angle of the 3rd submerged-arc welding wire 5 during welding, can ensure the front surface molding of the groove of low-temperature high-toughness steel 1; The angle x between the first submerged-arc welding wire 3 and the second submerged-arc welding wire 4 in the present embodiment is 15 ��, and the angle y between the second submerged-arc welding wire 4 and the 3rd submerged-arc welding wire 5 is 5 ��, it is possible to make weld seam 2 one-shot forming at groove place, improves welding efficiency.
Wherein, the welding current of the first submerged-arc welding wire 3 is 1360A, and arc voltage is 35V; The welding current of described second submerged-arc welding wire 4 is 1360A, and arc voltage is 40V; The welding current of described 3rd submerged-arc welding wire 5 is 1220A, and arc voltage is 40V, and the speed of welding of three submerged-arc welding wires is 50cm/min, and heat input is 180KJ/cm. When welding according to this welding parameter, it is possible to make the weld seam one-shot forming at the groove place of low-temperature high-toughness steel, to improve welding efficiency further.
The vertical length B1 of the part that the first submerged-arc welding wire 3 in above-described embodiment stretches out ignition tip is 35mm, the vertical length B2 of the part that described second submerged-arc welding wire 4 stretches out ignition tip is 45mm, the vertical length B3 of the part that described 3rd submerged-arc welding wire 5 stretches out ignition tip is 55mm, to further ensure that weld seam one-shot forming.
In the one side multi-wire submerged-arc welding method of the low-temperature high-toughness steel of the present embodiment, the model of the submerged-arc welding wire adopted is the welding wire for submerged-arc welding Y-DL of Tie Zhurong King Company.
Above-mentioned welding method is applied to polar region heavy duty deck carrier by the present embodiment, splices the low-temperature high-toughness steel thick for 31mm of long 4000m altogether so that splice joint efficiency improves 6 times.
In the description of this specification, specific features, structure, material or feature that the description of reference term " preferred embodiment " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention. In this manual, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example. And, the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example.
Above content is only presently preferred embodiments of the present invention, for those of ordinary skill in the art, according to the thought of the present invention, all will change in specific embodiments and applications, and this specification content should not be construed as limitation of the present invention.
Claims (10)
1. the one side multi-wire submerged-arc welding method of a low-temperature high-toughness steel, it is characterised in that comprise the following steps:
S100, a kind of low-temperature high-toughness steel of offer, carbon equivalent Cep��0.33% of described low-temperature high-toughness steel, mass fraction��0.01% of Al element;
S200, offer one side Y-shaped groove at the joint of two blocks of described low-temperature high-toughness steel;
S300, adopt many submerged-arc welding wires to weld at described Y-shaped groove place, two blocks of described low-temperature high-toughness steel can be connected.
2. the one side multi-wire submerged-arc welding method of low-temperature high-toughness steel according to claim 1, it is characterised in that described low-temperature high-toughness steel is smelted through deoxidation, TMCP PROCESS FOR TREATMENT prepares, and the deoxidizer that described deoxidation metallurgy adopts is Ti element.
3. the one side multi-wire submerged-arc welding method of low-temperature high-toughness steel according to claim 1, it is characterised in that in parts by weight, described low-temperature high-toughness steel also comprises following component:
C:0.05%��0.10%, Si:0.15%��0.30%, Mn:1.30%��1.50%, P :��0.02%, S :��0.01%, Ni :��0.20%, Nb :��0.03%, V :��0.02%, Cu :��0.02%, Mo :��0.10%.
4. the one side multi-wire submerged-arc welding method of low-temperature high-toughness steel according to claim 1, it is characterised in that described step S300 specifically includes following steps:
S300a: arrange copper lining from the side of described Y-shaped groove at described low-temperature high-toughness steel backing, lays the first solder flux covering described Y-shaped groove between described copper lining and described low-temperature high-toughness steel, fills the second solder flux at described groove place;
S300b: the groove center that many described submerged-arc welding wire intervals are placed in described Y-shaped groove is welded.
5. the one side multi-wire submerged-arc welding method of low-temperature high-toughness steel according to claim 4, it is characterised in that the width of described solder flux is 90��110mm, and thickness is 4��6mm, the widthwise central of described solder flux just gap center to described Y-shaped groove.
6. the one side multi-wire submerged-arc welding method of low-temperature high-toughness steel according to claim 1, it is characterised in that the bevel angle of described Y-shaped groove is 42��48 ��;
Preferably, the root face height of described Y-shaped groove is 5��7mm;
Preferably, the gap between the root face of two blocks of described low-temperature high-toughness steel is 0��1mm.
7. the one side multi-wire submerged-arc welding method of low-temperature high-toughness steel according to claim 5, it is characterized in that, welding current during described welding is 1200��1400A, and arc voltage is 34��12V, speed of welding is 45��55cm/min, and heat input is 160��200KJ/cm.
8. the one side multi-wire submerged-arc welding method of low-temperature high-toughness steel according to claim 7, it is characterized in that, three described submerged-arc welding wire intervals successively are placed in the groove center of described Y-shaped groove, three described submerged-arc welding wire respectively the first submerged-arc welding wires, second submerged-arc welding wire and the 3rd submerged-arc welding wire, wherein, described second submerged-arc welding wire is arranged between described first submerged-arc welding wire and described 3rd submerged-arc welding wire, distance between welding ends and the welding ends of described second submerged-arc welding wire of described first submerged-arc welding wire is 30��40mm, distance between welding ends and the welding ends of described 3rd submerged-arc welding wire of described second submerged-arc welding wire is 110��140mm.
9. the one side multi-wire submerged-arc welding method of low-temperature high-toughness steel according to claim 8, it is characterized in that, described second submerged-arc welding wire is perpendicular to the surface of described low-temperature high-toughness steel, angle between described first submerged-arc welding wire and described second submerged-arc welding wire is 12��16 ��, and the angle between described second submerged-arc welding wire and described 3rd submerged-arc welding wire is 4��6 ��.
10. the one side multi-wire submerged-arc welding method of low-temperature high-toughness steel according to claim 8, it is characterised in that the welding current of described first submerged-arc welding wire is 1360A, and arc voltage is 35V; The welding current of described second submerged-arc welding wire is 1360A, and arc voltage is 40V; The welding current of described 3rd submerged-arc welding wire is 1220A, and arc voltage is 40V.
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| CN108788411A (en) * | 2018-07-02 | 2018-11-13 | 中国电建集团核电工程有限公司 | Back chipping welding procedure is exempted from medium plate splicing |
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