AU2020101820A4 - Sintered flux for high-efficiency 309nb single-layer strip surfacing used in cooperation with eq309lnb welding strip and preparation method therefor - Google Patents
Sintered flux for high-efficiency 309nb single-layer strip surfacing used in cooperation with eq309lnb welding strip and preparation method therefor Download PDFInfo
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3603—Halide salts
- B23K35/3605—Fluorides
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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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- Engineering & Computer Science (AREA)
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- Nonmetallic Welding Materials (AREA)
Abstract
CN 110405381 A Abstract Page 1/1
The present invention provides an agglomerated flux for high-efficiency 309Nb
single-layer strip surfacing used in cooperation with an EQ309LNb welding strip and
a preparation method therefor, and relates to an agglomerated flux and a preparation
method. The purpose of the present invention is to solve the problem that it is unable
to realize cooperation welding with the 309Nb welding strip at a welding speed of
400-500 mm/min to increase the working efficiency. The agglomerated flux
comprises the components of the following proportion by weight: 70-80 parts of CaF2,
15-20 parts of A12 03 , 4-10 parts of SiO2 , 2-8 parts of CaO, 1-5 parts of MgO, 1-2
parts of alloying agent and 10-15 parts of binder. The above components are mixed,
granulated and sintered in sequence, and thus obtaining the agglomerated flux. When
the flux of the present invention is used in cooperation with a 309Nb welding strip for
surfacing, the efficiency is increased by 60-100% as compared with the ordinary
single-layer strip surfacing and the efficiency is increased by 33-67% as compared
with the high-speed strip surfacing. The present invention is applied to the field of
surfacing.
1
Description
CN 110405381 A Description Page -1/8
AGGLOMERATED FLUX FOR HIGH-EFFICIENCY 309NB SINGLE-LAYER STRIP SURFACING USED IN COOPERATION WITH EQ309LNB WELDING STRIP AND PREPARATION METHOD THEREFOR
Technical Field The present invention relates to the field of agglomerated fluxes, particularly to an agglomerated flux for high-efficiency 309Nb single-layer strip surfacing used in cooperation with an EQ309LNb welding strip and a preparation method therefor.
Background At present, with the large-scale development of hydrogenation equipment, the area to be surfaced of the corrosion-resistant lining of the inner wall of the equipment is increased, and a stainless steel corrosion-resistant layer is surfaced in a reactor, so high-efficiency and fast strip surfacing is usually used. Double-layer strip surfacing is a commonly used surfacing method at present. However, the method has the primary problems of long manufacturing period and large amount of welding materials used, thereby increasing the production costs of equipment manufacturers and restricting the development of equipment manufacturers. Single-layer strip surfacing is a surfacing method adopted in China in recent years, which increases the efficiency of surfacing, shortens the equipment manufacturing period, and reduces production costs. A 309Nb welding strip and a matching flux are usually used as strip surfacing material for the inner wall of the hydrogenation equipment. The welding speed of the traditional single-layer surfacing is about 160-250 mm/min. If there is a need to increase the efficiency, high-speed single-layer electroslag surfacing is used, the welding speed is about 300-50 mm/min, and 309Nb welding strips and matching fluxes of most welding material manufacturers are at this level. However, the welding speed cannot meet the current requirements for working efficiency of 309Nb welding strips and matching fluxes, so the welding speed cannot be significantly increased. Therefore, the problem to be solved at present is how to develop a flux capable of being used in cooperation with a 309Nb welding strip to increase welding speed and increase working efficiency. Patent with publication No. of CN109483083 A, title of "welding strip for submerged arc surfacing with stainless steel strip for nuclear power, agglomerated flux and method for submerged arc surfacing with stainless steel strip for nuclear
CN 110405381 A Description Page 0/8
power". The patent discloses that the use of the flux composed of CaF2, A1 20 3 , SiO2, CaO, MgO, Cr, Ni, alloying agent and binder in cooperation with the welding strip for submerged arc surfacing with stainless steel strip has the effects of thinning slag, making slag and improving weld bead shape, can suppress the problem of slag sticking caused by the increase in Nb element, and can increase the tensile strength of deposited metal for welded joints. The ultimate purpose of the flux that can be used is to increase the tensile strength of the deposited metal for welded joints. Although the components of the flux in this patent are similar to those in the present application, the usage amount is different from that in the present application, for example, the ratio of CaF2 to A12 03 is 0.23-1, which is obviously less than 3.7. If the welding flux with the components is used in cooperation with the 309Nb welding strip, when the welding speed is 400-500 mm/min, the conductivity of slag is insufficient, which easily causes the welding strip to directly stick to the base metal, resulting in short circuit and interruption of the surfacing process, and easily causes the problem of poor coverage of slag, so the welding speed cannot be increased. According to this patent, the welding speed is 140-170 mm/min, that is to say, this document can only achieve the invention purpose at this speed, and this document does not give the technical disclosure about how to increase the welding speed and realize use of cooperation between the flux and the 309Nb welding strip.
Summary To solve the problem that it is unable to realize cooperation welding with the 309Nb welding strip at a welding speed of 400-500 mm/min to increase the working efficiency, the present invention provides an agglomerated flux for high-efficiency 309Nb single-layer strip surfacing used in cooperation with an EQ309LNb welding strip and a preparation method therefor. An agglomerated flux for high-efficiency 309Nb single-layer strip surfacing used in cooperation with an EQ309LNb welding strip of the present invention, comprising the components of the following proportion by weight: 70-80 parts of CaF2, 15-20 parts of A12 0 3 , 4-10 parts of SiO2 , 2-8 parts of CaO, 1-5 parts of MgO, 1-2 parts of alloying agent and 10-15 parts of binder; the EQ309LNb welding strip comprises the components of the following proportion by mass percentage: less than or equal to 0.02% of C, less than or equal to 0.65% of Si, 1.5-2.5% of Mn, 23.0-25.0% of Cr, 12.0-13.0% of Ni, 0.7-1.0% of Nb,
CN 110405381 A Description Page 1/8
less than or equal to 0.06% of N, less than or equal to 0.20% of Cu, less than or equal to 0.010% of S, less than or equal to 0.020% of P, less than or equal to 0.20 of Mo, and Fe as the rest. The above raw materials of the agglomerated flux are mixed, granulated and sintered in sequence, and thus the agglomerated flux is prepared. The present invention has the following advantageous effects: When the flux of the present invention is used in cooperation with a 309Nb welding strip for surfacing, the efficiency is increased by 60-100% as compared with
the ordinary single-layer strip surfacing and the efficiency is increased by 33-67% as compared with the high-speed strip surfacing, the working efficiency of surfacing on the inner wall of hydrogenation equipment is greatly increased, and the manufacturing period of equipment is shortened. When the agglomerated flux of the present invention is used in cooperation with the 309Nb welding strip for single-layer surfacing, the welding speed can reach 400-500 mm/min, which greatly increases the working efficiency of surfacing on the inner wall of hydrogenation equipment under the condition that the chemical components, mechanical properties and corrosion resistance meet the requirements. It is found through the present invention that when the welding speed is 400-500 mm/min and the ratio of CaF2 to A12 0 3 is less than 3.7, the conductivity of slag is insufficient, which easily causes the welding strip to directly stick to the base metal, resulting in short circuit and the interruption of the surfacing process, and easily causes the problem of poor coverage of slag; when the ratio of CaF2 to A1 20 3 is greater than 5, the amount of CaF2 increases, arcs are prone to occur in the electroslag surfacing process, and spatter increases at the same time, resulting in interruption of the surfacing process. In order to solve the above problems, in the present invention, the ratio of CaF2 to A12 03 in the agglomerated flux is adjusted to 3.7-5, and the conductivity of slag is increased to solve the problem of welding speed, thereby inventing a flux for high efficiency 309Nb single-layer strip surfacing. Meanwhile, with the adjustment of the use amount of other components, the following functions can be achieved. The functions of other components of the agglomerated flux are explained as follows: SiO2 : mainly playing the role of deslagging, because the Nb element is easy to
CN 110405381 A Description Page 2/8
form a spinel compound with A12 0 3 , CaO and MgO to cause slag sticking when the flux is used in cooperation with a dedicated 309Nb welding strip for single-layer surfacing, SiO2 undergoes four phase transition processes when cooled from high temperature to low temperature, and the volume changes as the crystal lattice changes, thereby having a good effect on deslagging. When the content of SiO2 is less than 4 parts, the slag detachability is not greatly improved; and when the content of SiO 2 is greater than 10 parts, the corrugation of the surfacing weld bead becomes thicker and the shape is not good, so the content of SiO 2 is 4-10 parts. CaO: mainly playing the role of making slag and improving shape, when the content of CaO is less than 2 parts, the slagging agent is few, the coverage of the weld bead is incomplete; and when the content of CaO is greater than 8 parts, the corrugation of the surfacing weld bead becomes thicker and the shape is not good, so the content of CaO is 2-8 parts. MgO: mainly playing the role of making slag and improving overlapping, when the content of MgO is less than 1 part, undercut appears in weld bead overlapping; and when the content of CaO is greater than 5 parts, the slag is too much, and black slag appears on the edge, so the content of MgO is 1-5 parts. Alloying agent: playing the role of supplementing the alloy of the surfacing layer and adjusting the ferrite content of the surfacing layer, the alloying agent mainly includes Cr and Ni, which are added in the form of metallic chromium powder and nickel powder. Binder: including sodium water glass and potassium water glass in the ratio of 1:1, mainly playing the role of bonding, increasing the particle strength of the flux.
Detailed Description Specific embodiment 1: an agglomerated flux for high-efficiency 309Nb single layer strip surfacing used in cooperation with an EQ309LNb welding strip of this embodiment, comprising the components of the following proportion by weight: 70 parts of CaF2, 15-20 parts of A1 2 0 3 , 4-10 parts of SiO 2 , 2-8 parts of CaO, 1-5 parts of MgO, 1-2 parts of alloying agent and 10-15 parts of binder; the EQ309LNb welding strip comprises the components of the following proportion by mass percentage: less than or equal to 0.02% of C, less than or equal to 0.65% of Si, 1.5-2.5% of Mn, 23.0-25.0% of Cr, 12.0-13.0% of Ni, 0.7-1.0% of Nb, less than or equal to 0.06% of N, less than or equal to 0.20% of Cu, less than or equal
CN 110405381 A Description Page 3/8
to 0.010% of S, less than or equal to 0.020% of P, less than or equal to 0.20 of Mo, and Fe as the rest. Specific embodiment 2: this embodiment is different from specific embodiment 1 in that: the agglomerated flux comprises the components of the following proportion by weight: 74-80 parts of CaF2, 18-20 parts of A1 2 0 3 , 5-8 parts of SiO 2 , 3-7 parts of CaO, 1.5-4 parts of MgO, 1.3-2 parts of alloying agent and 12-15 parts of binder. Others are the same as those in embodiment 1. Specific embodiment 3: this embodiment is different from specific embodiment 1 in that: the agglomerated flux comprises the components of the following proportion by weight: 74-77 parts of CaF2, 16-20 parts of A1 2O3 , 5-8 parts of SiO 2 , 3-6 parts of CaO, 2-4 parts of MgO, 1.5-2 parts of alloying agent and 12-15 parts of binder. Others are the same as those in embodiment 1. Specific embodiment 4: this embodiment is different from specific embodiment 1 in that: the agglomerated flux comprises the components of the following proportion by weight: 70-77 parts of CaF2, 15-20 parts of A1 2O3 , 5-8 parts of SiO 2 , 3-6 parts of CaO, 2-4 parts of MgO, 1.5-2 parts of alloying agent and 12-15 parts of binder. Others are the same as those in embodiment 1. Specific embodiment 5: this embodiment is different from specific embodiment 1 in that: the alloying agent is composed of Cr and Ni in the mass ratio of 1:0.3. Others are the same as those in embodiment 1. Specific embodiment 6: this embodiment is different from specific embodiment 1 in that: the binder is composed of sodium water glass and potassium water glass, wherein the mass ratio of sodium water glass to potassium water glass is 1:1. Others are the same as those in embodiment 1. Specific embodiment 7: this embodiment is different from specific embodiment 1 in that: the welding speed when the agglomerated flux for 309Nb single-layer strip surfacing is used in cooperation with the EQ309LNb welding strip for surfacing is 400-500 mm/min. Others are the same as those in embodiment 1. Specific embodiment 8: this embodiment is different from specific embodiment 1 in that: the welding speed is 450-500 mm/min. Others are the same as those in embodiment 1. Specific embodiment 9: a preparation method for the agglomerated flux for high efficiency 309Nb single-layer strip surfacing used in cooperation with an EQ309LNb welding strip of this embodiment, comprising the following steps: mixing
CN 110405381 A Description Page 4/8
corresponding raw materials of the components of the agglomerated flux, granulating and sintering in sequence, and thus obtaining the agglomerated flux. Specific embodiment 10: this embodiment is different from specific embodiment 9 in that: the sintering temperature is 700-850°C. Others are the same as those in embodiment 9. The contents of the present invention are not limited to the contents of the above embodiments, and a combination of one or more embodiments can also achieve the purposes of the present invention. The beneficial effects of the present invention are verified through the following embodiments: Embodiment 1 In order to determine the applicability of the present invention, two flux formulae are selected for test, as shown in Table 1, when used in cooperation with a dedicated EQ309LNb welding strip for single-layer surfacing test, components of the welding strip conform to the standards of GB/T29713-2013, IS014343-2017 and NB/T47018.5-2017, and the components of the welding strip are shown in Table 2. Three welding speeds are selected, including 400 mm/min, 450 mm/min, and 500 mm/min. The thickness of the surfacing layer is 4.8 mm. Specific welding parameters and deposition efficiency are shown in Table 3. 2.25Cr-lMo steel plate is used as base metal, the base metal having a thickness of 50 mm. The bending property and corrosion property of the surfacing layer are measured separately. The heat treatment process includes: heating temperature: 690°C, heat preservation: 32h, reduction of
temperature to 300°C, air cooling. The side bend test is carried out in accordance with the requirements of GB/T2653-2008, and the corrosion test is carried out in accordance with the requirements of the GB4334-2008E method. Six surfacing layers are all qualified in side bend test, and all have no tendency of intergranular corrosion. Chemical components are taken 3mm away from the surface of the surfacing layer, the ferrite content of each of the six surfacing layers is calculated according to the WRC-92 diagram, and the calculation results of the chemical components and ferrite content of the surfacing layers are shown in Table 4. Table 1 Formula of flux
Number CaF2 A1 2 0 3 Si0 2 CaO MgO Alloying Binder agent
CN 110405381 A Description Page 5/8
1:1 water Cr Ni glass SJ15G-1 70 18 8 7 4 1 0.3 12 SJ15G-2 74 15 5 3 1.5 1 0.3 12
Table 2 Chemical components (Wt.%) of EQ309LNb welding strip
Classification number C Si Mn S P GB/T 29713 309LNb < 0.03 < 0.65 1.0-2.5 < 0.03 < 0.03 ISO 14343 309LNb < 0.03 < 0.65 1.0-2.5 <0.03 < 0.03 NB/T 47018.5 < 0.03 < 1.00 0.5-2.5 50.015 < 0.025 EQ309LNb EQ309LNb 0.015 0.30 2.2 0.005 0.015 Classification number Cr Ni Mo Cu Nb N 23.0- 12.0- No GB/T 29713 < 0.75 < 0.75 10*C-1.0 25.0 14.0 requirement 23.0- 12.0- 10*C-1.0, > No ISO 14343 23 12 Nb < 0.75 < 0.75 25.0 14.0 0.2 requirement NB/T 47018.5 21.0- No No 9.0-14.0 <0.75 8*C-1.0 EQ309LNb 25.0 requirement requirement EQ309LNb 24.85 12.1 0.05 0.02 0.80 0.05 Table 3 Process parameters of 309Nb single-layer strip surfacing Weld Weld Power WeldingWelding Welding Interbead bead bead Deposition Number supply current voltage speed temperaturethickness width efficiency polarity /A N /(mm/min) °C /(Kg/h)
0 DCEP 1800 26 300 150-200 4.8 63 42.4 A DCEP 2200 26 400 150-200 4.8 63 56.6 B DCEP 2400 26 450 150-200 4.8 63 63.7 C DCEP 2600 26 500 150-200 4.8 63 70.7 Table 4Chemical components and ferrite content (Wt.%) of 309Nb surfacing layers
Number Welding C Si Mn S P Cr process NB/T 47018.5 < 0.05 < 1.00 < 2.5 < 0.020 < 0.030 18.0-21.0
CN 110405381 A Description Page 6/8
FZ347-D A(400) 0.032 0.66 1.35 0.008 0.018 18.7 SJ15G-l+EQ309LNb B(450) 0.034 0.68 1.36 0.008 0.020 18.6 C(500) 0.035 0.68 1.35 0.009 0.018 18.3 A(400) 0.031 0.58 1.42 0.007 0.019 18.9 SJ15G_2+EQ309LNb B(450) 0.033 0.60 1.41 0.007 0.018 18.8 C(500) 0.035 0.61 1.42 0.008 0.020 18.5 Ferrite Number Ni Mo Cu Nb N content /FN WRC-92 NB/T 47018.5 8* 9.0-12.0 - < 0.75 3-8 FZ347-D C-1.0 A(400) 9.7 0.18 0.03 0.48 0.045 7.0 SJ15G-l+EQ309LNb B(450) 9.6 0.17 0.03 0.46 0.044 6.7 C(500) 93 0.18 0.03 0.42 0.048 6.1 A(400) 9.8 0.20 0.03 0.50 0.046 7.6 SJ15G-2+EQ309LNb B(450) 9.7 0.19 0.03 0.48 0.044 7.4 C(500) 9.4 0.19 0.03 0.45 0.045 6.9
It can be seen from the deposition efficiency of Table 3 that the efficiency of the agglomerated flux for high-efficiency 309Nb single-layer strip surfacing in this embodiment is 33-67% higher than that of the ordinary high-speed agglomerated flux. It can be seen from Table 4 that when the agglomerated flux for high-efficiency 309Nb single-layer strip surfacing of this embodiment is used in cooperation with the dedicated 309Nb welding strip for surfacing, the chemical components and ferrite content of the surfacing layers meet the standard requirements.
Claims (5)
1. An agglomerated flux for high-efficiency 309Nb single-layer strip surfacing used in cooperation with an EQ309LNb welding strip, comprising the components of the following proportion by weight: 70-80 parts of CaF2, 15-20 parts of A1 20 3 , 4-10 parts of SiO 2 , 2-8 parts of CaO, 1-5 parts of MgO, 1-2 parts of alloying agent and 10 parts of binder; the EQ309LNb welding strip comprises the components of the following proportion by mass percentage: less than or equal to 0.02% of C, less than or equal to 0.65% of Si, 1.5-2.5% of Mn, 23.0-25.0% of Cr, 12.0-13.0% of Ni, 0.7-1.0% of Nb, less than or equal to 0.06% of N, less than or equal to 0.20% of Cu, less than or equal to 0.010% of S, less than or equal to 0.020% of P, less than or equal to 0.20 of Mo, and Fe as the rest.
2. The agglomerated flux for high-efficiency 309Nb single-layer strip surfacing used in cooperation with an EQ309LNb welding strip according to claim 1, wherein the alloying agent is composed of Cr and Ni in a mass ratio of 1:0.3
3. The agglomerated flux for high-efficiency 309Nb single-layer strip surfacing used in cooperation with an EQ309LNb welding strip according to claim 1, wherein the binder is composed of sodium water glass and potassium water glass, wherein the mass ratio of sodium water glass to potassium water glass is 1:1.
4. The agglomerated flux for high-efficiency 309Nb single-layer strip surfacing used in cooperation with an EQ309LNb welding strip according to claim 1, wherein the welding speed when the agglomerated flux for 309Nb single-layer strip surfacing is used in cooperation with the EQ309LNb welding strip for surfacing is 400-500 mm/min.
5. A method for preparing the agglomerated flux for high-efficiency 309Nb single-layer strip surfacing used in cooperation with an EQ309LNb welding strip according to claim 1, comprising the following steps: mixing corresponding raw materials of the components of the agglomerated flux, granulating and sintering in sequence, and thus obtaining the agglomerated flux, wherein the sintering temperature is 700-850°C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3995251A1 (en) * | 2020-11-10 | 2022-05-11 | Voestalpine Böhler Welding Belgium s.a. | Method for depositing an overlay material onto a metal surface by means of electroslag strip cladding |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3995251A1 (en) * | 2020-11-10 | 2022-05-11 | Voestalpine Böhler Welding Belgium s.a. | Method for depositing an overlay material onto a metal surface by means of electroslag strip cladding |
| WO2022101789A1 (en) * | 2020-11-10 | 2022-05-19 | Voestalpine Böhler Welding Belgium S.A. | Method for depositing an overlay material onto a metal surface by means of electroslag strip cladding |
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