CN108274101A - A kind of welding method of super-duplex stainless steel 2507 - Google Patents
A kind of welding method of super-duplex stainless steel 2507 Download PDFInfo
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- CN108274101A CN108274101A CN201711380088.4A CN201711380088A CN108274101A CN 108274101 A CN108274101 A CN 108274101A CN 201711380088 A CN201711380088 A CN 201711380088A CN 108274101 A CN108274101 A CN 108274101A
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- welding
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- weld
- duplex stainless
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Classifications
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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
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- 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
- B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
- B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
-
- 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
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of welding method of super-duplex stainless steel 2507, the method includes：Using consumable electrode semi-automatic gas shielded arc welding GMAW；The welding material used is welded as solid welding wire；Weld the protective gas that uses for 75% argon gas and 25% helium mixed gas；Welding groove is polished into two-sided " V " type；By inside above-mentioned groove and its within the scope of each 25mm in both sides greasy dirt and moisture content clean out；The welding number of plies of welding groove from top to bottom position 4,3,2,1,5,6,7 layers, and welded by specific weld method by welding parameter table；Weld interpass temperature is controlled at 100 DEG C or less；Weld heat input is controlled in 9.0 10.5KJ/cm.The method of the present invention improves the tensile strength and low-temperature impact toughness of welding line joint, plasticity and excellent anti-corrosion performance, and weld metal and base material fusion are good；The utilization rate for significantly improving wlding, improves energy-saving effect, reduces the generation of noxious fume；It ensure that the stability and reliability of welding line joint quality.
Description
Technical field
The present invention relates to the welding of a kind of welding method of stainless steel more particularly to a kind of super-duplex stainless steel 2507
Method.
Background technology
Super-duplex stainless steel refers to PREN ＞ 40, contains 25% chromium Cr and high molybdenum Mo (＞ 3.5%), high nitrogen N (0.22~
0.30%) dual phase steel.The most commonly used is the trade mark 2507 (i.e. UNS32750), and it is super double to be illustrated in figure 3 UNS32750
The chemical composition of phase stainless steel, by France, Sweden, UK corporation researches and develops successfully before and after 1991, and introduces to the market.
2507 super-duplex stainless steels have higher gold content compared with high alloy duplex stainless steel 2205；2507 is super
The balanced design of high chromium Cr, high molybdenum Mo and high nitrogen N in two phase stainless steel so that its ability in terms of resisting corrosion of chlorine ion has substantially
It improves, while being showed well in terms of slit and corrosion resistant, spot corrosion and stress corrosion, had very to organic acid and part inorganic acid
Low rate of corrosion.The stainless steel mechanical property in 316L in Unite States Standard, 2250 and 2507 is illustrated in figure 4 to compare, it can from the figure
To find out, the intensity of 2507 super-duplex stainless steels improves 20% or more, therefore under same Structural strength calls, is made
Steel weight is compared with 10-15% is reduced for 2205 two phase stainless steels, energy-saving effect is clearly.It can be seen that super double
Phase stainless steel wins the favor of user with its superior mechanical property and corrosion resistance, it has also become not only saves weight, but also section
The corrosion-resisting engineering material of investment-saving.
The super-duplex stainless steel welding procedure that the country uses at present is that welding electrode arc welding (SMAW) and tungsten gas are protected
Arc welding (GTAW).It is welded using this welding procedure, low production efficiency, and material effective rate of utilization is low；Wherein SMAW
The effective deposition of wlding is that 55% or so, GTAW is 85% or so.Moreover, a large amount of welding cigarette will be generated in SMAW techniques
Dirt, not only environmental pollution is larger, also has apparent injury to the occupational health of operation welder.Therefore, it is necessary to a kind of welding sides
Method improves production efficiency, improves operating condition, reduces environmental pollution.
Invention content
In order to solve the above technical problems, the present invention proposes a kind of welding method of stainless steel, which raises efficiency, reduce
Environmental pollution.
In order to achieve the above object, technical scheme is as follows：A kind of welding side of super-duplex stainless steel 2507
Method, the method includes：
(1) consumable electrode semi-automatic gas shielded arc welding GMAW is used；
(2) welding material that welding uses is solid welding wire；
(3) wire feed rate of the welding wire is 6-8m/min.
(4) protective gas that uses of welding for 75% argon gas and 25% helium mixed gas；
(5) flow of the protective gas is 15-20L/min；
(6) welding groove is polished into two-sided " V " type；
(7) the groove inside in method (6) and its greasy dirt within the scope of each 25mm in both sides and moisture content are cleaned out；
(8) the welding number of plies of welding groove from top to bottom position 4,3,2,1,5,6,7 layers, and by welding parameter table by specific
Welding method is welded；
(9) weld interpass temperature control is at 100 DEG C or less；
(10) weld heat input control is in 9.0-10.5KJ/cm.
Preferably, the welding method includes：
(1) 1-4 layers are welded first；
(2) reversible deformation spot welding is carried out to workpiece in advance；
(3) 1-4 layers be welded after, each weld seam interlayer is cleaned out, the back side with stainless steel special grinding wheel piece polish back chipping,
And welding slag is cleaned out, until showing complete metallic luster；
(4) welding parameter table is pressed to complete 5-7 layers of welding.
Preferably, the GMAW is welded using DC reverse connection form.
Preferably, the solid welding wire is the solid welding wire of a diameter of 1.2mm of Sweden Avesta ER2594.
Preferably, the purity of the mixed gas is 99.9%.
Preferably, temperature control uses water cooling, and moisture content must be dried up before welding again, and ensure weld seam and
The drying of heat affected area.
It is welded using this method, the tensile strength of welding line joint can be made to improve, function admirable；Make low-temperature impact toughness
Minimum value improve, toughness is extremely excellent；Lateral bending detects, it can be seen that its plastic property is excellent；Its essential element content meets
The requirement of UNS32750；Resistance to Cl- spot corrosion is had excellent performance in corrosive nature detection；Seam organization two-phase is better than controlling, and makes iron
Ferritic and austenite accounting are close to 50:50；Weld seam macroscopic view metallographic examination, it can be seen that weld metal and base material fusion are good, and nothing is split
The defects of line, stomata, solid inclusion, incomplete fusion and lack of penetration phenomenon, amorphism and size；The utilization rate of wlding reaches 95-
98%, energy-saving effect is apparent, and noxious fume is greatly decreased；This method is using semi-automatic, continuous wire feeding mode welding, comprehensive weldering
The efficiency of production of delivering a child significantly improves；It, can be to welding operation process using the semi-automatic arc welder of Current Voltage feedback in this method
In parameter carry out real-time adjust automatically, reduce the influence of human factor, ensure that welding line joint quality stability and
Reliability.
Beneficial effects of the present invention：The welding method of the super-duplex stainless steel 2507 of the present invention improves welding line joint
Tensile strength improves low-temperature impact toughness, and plastic property is excellent, excellent anti-corrosion performance, and weld metal fuses good with base material
It is good；Significantly improve the utilization rate of wlding, hence it is evident that improve energy-saving effect, and the generation of noxious fume is greatly reduced；It improves
The efficiency of comprehensive welding production, reduces labor intensity, improves working environment, ensure that the stability of welding line joint quality
And reliability.
Description of the drawings
Fig. 1 is the structural schematic diagram of two-sided " V " type of welding groove of the present invention；
Fig. 2 is the welding schematic diagram of a layer structure of the present invention；
Fig. 3 is the chemical composition of UNS32750 super-duplex stainless steels；
Fig. 4 is that the stainless steel mechanical properties of 316L, 2250 and 2507 compare in Unite States Standard；
Fig. 5 is welding parameter table.
Specific implementation mode
The present invention will be further described in detail with reference to the specific embodiments.
A kind of welding method of super-duplex stainless steel 2507, the method includes：
(1) consumable electrode semi-automatic gas shielded arc welding GMAW is used；
(2) welding material that welding uses is solid welding wire；
(3) wire feed rate of the welding wire is 6-8m/min.
(4) flow of the protective gas is 15-20L/min
(5) protective gas that uses of welding for 75% argon gas and 25% helium mixed gas；
(6) as shown in Figure 1, welding groove is polished into two-sided " V " type；
(7) the groove inside in method (6) and its greasy dirt within the scope of each 25mm in both sides and moisture content are cleaned out；
(8) as shown in Fig. 2, the welding number of plies of welding groove from top to bottom position 4,3,2,1,5,6,7 layers, and pass through such as Fig. 5
Shown in welding parameter table welded by specific weld method；
(9) weld interpass temperature control is at 100 DEG C or less；
(10) weld heat input control is in 9.0-10.5KJ/cm.
The welding method includes：
(1) 1-4 layers are welded first；
(2) reversible deformation spot welding is carried out to workpiece in advance；
(3) 1-4 layers be welded after, each weld seam interlayer is cleaned out, the back side with stainless steel special grinding wheel piece polish back chipping,
And welding slag is cleaned out, until showing complete metallic luster；
(4) welding parameter table as shown in Figure 5 is pressed to complete 5-7 layers of welding.
The GMAW is welded using DC reverse connection form.
The solid welding wire is the solid welding wire of a diameter of 1.2mm of Sweden Avesta ER2594.
The purity of the mixed gas is 99.9%.
The temperature control uses water cooling, and must dry up moisture content before welding again, and ensures weld dimensions
Drying.
Super-duplex stainless steel 2507 is welded using this method, the tensile strength of welding line joint can be made to reach
885MPa, function admirable；After being welded by the method, -40 DEG C of low-temperature impact toughness minimum value can reach 159J, far above mark
The 54J of alignment request, toughness are extremely excellent；After the completion of welding, lateral bending detection, modeling are carried out according to U.S.'s ASME IX-2013 standards
Property function admirable, meets the requirements；Wherein essential element content meets the requirement of UNS32750；According to U.S.'s ASTM A923 standards
Middle method C carries out corrosive nature detection, and detection sample is 3.06mdd, is not more than 10mdd in what ASTM A923 standards required
In range, resistance to Cl- spot corrosion is had excellent performance；It is welded with the method, seam organization two-phase is better than controlling, wherein iron
Ferritic accounts for 53%, and austenite accounts for 47%, and ferrite and austenite are close to 50:50；Pass through weld seam macroscopic view metallographic examination, weld metal
Well with base material fusion, the defects of flawless, stomata, solid inclusion, incomplete fusion and lack of penetration phenomenon, amorphism and size；With
The method is welded, and the utilization rate of wlding reaches 95-98%, is far above the 55% of welding rod utilization rate, than argon arc welding utilization rate
85% also have sizable raising, energy-saving effect is apparent, and noxious fume is greatly decreased；This method is using semi-automatic, continuous
Wire feeding mode welds, and the efficiency of comprehensive welding production is about 2.5-3 times of welding rod welding efficiency, is the 4- of argon arc welding welding efficiency
5 times, efficiency significantly improves；It, can be in welding operation process using the semi-automatic arc welder of Current Voltage feedback in this method
Parameter carries out real-time adjust automatically, reduces the influence of human factor, ensure that the stability of welding line joint quality and reliable
Property.
The welding method of super-duplex stainless steel 2507 through the invention is welded, and production efficiency is improved, and is reduced
Labor intensity, improves working environment, improves effects of energy saving and emission reduction, and mechanical property can be obtained and corrosion resistance is all good
Welding line joint.
Finally, those skilled in the art can use for reference the appropriate feed change of present disclosure, the links such as process conditions
Realize corresponding purpose, it is relevant to change all without departing from present disclosure, so similar replacement and change for
It is it will be apparent that being considered as being included within the scope of the present invention for those skilled in the art.
Claims (6)
1. a kind of welding method of super-duplex stainless steel 2507, which is characterized in that the method includes：
(1) consumable electrode semi-automatic gas shielded arc welding GMAW is used；
(2) welding material that welding uses is solid welding wire；
(3) wire feed rate of solid welding wire is 6-8m/min；
(4) protective gas that uses of welding for 75% argon gas and 25% helium mixed gas；
(5) flow of protective gas is 15-20L/min；
(6) welding groove is polished into two-sided " V " type；
(7) the groove inside in method (6) and its greasy dirt within the scope of each 25mm in both sides and moisture content are cleaned out；
(8) the welding number of plies of welding groove from top to bottom position 4,3,2,1,5,6,7 layers, and by welding parameter table press specific weld
Method is welded；
(9) weld interpass temperature control is at 100 DEG C or less；
(10) weld heat input control is in 9.0-10.5KJ/cm.
2. the welding method of super-duplex stainless steel 2507 according to claim 1, which is characterized in that the welding method
Including：
(1) 1-4 layers are welded first；
(2) reversible deformation spot welding is carried out to workpiece in advance；
(3) 1-4 layers be welded after, each weld seam interlayer is cleaned out, the back side is polished back chipping with stainless steel special grinding wheel piece, and handle
Welding slag is cleaned out, until showing complete metallic luster；
(4) welding parameter table is pressed to complete 5-7 layers of welding.
3. the welding method of super-duplex stainless steel 2507 according to claim 1, which is characterized in that the GMAW is used
DC reverse connection form is welded.
4. the welding method of super-duplex stainless steel 2507 according to claim 1, which is characterized in that the solid welding wire
For the solid welding wire of a diameter of 1.2mm of Sweden Avesta ER2594.
5. the welding method of super-duplex stainless steel 2507 according to claim 1, which is characterized in that the mixed gas
Purity be 99.9%.
6. the welding method of super-duplex stainless steel 2507 according to claim 1, which is characterized in that the temperature control
Using water cooling, and moisture content must be dried up before welding again, and ensure the drying of weld dimensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711380088.4A CN108274101A (en) | 2017-12-20 | 2017-12-20 | A kind of welding method of super-duplex stainless steel 2507 |
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| CN201711380088.4A CN108274101A (en) | 2017-12-20 | 2017-12-20 | A kind of welding method of super-duplex stainless steel 2507 |
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| CN108274101A true CN108274101A (en) | 2018-07-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253117A (en) * | 2019-06-20 | 2019-09-20 | 中船澄西新荣船舶有限公司 | A kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel |
| CN111069747A (en) * | 2019-12-31 | 2020-04-28 | 武汉武船计量试验有限公司 | Welding method of duplex stainless steel |
| CN112276387A (en) * | 2020-09-03 | 2021-01-29 | 海洋石油工程（青岛）有限公司 | Double-side welding process method for dual-phase steel explosion-proof wall |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253117A (en) * | 2019-06-20 | 2019-09-20 | 中船澄西新荣船舶有限公司 | A kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel |
| CN111069747A (en) * | 2019-12-31 | 2020-04-28 | 武汉武船计量试验有限公司 | Welding method of duplex stainless steel |
| CN112276387A (en) * | 2020-09-03 | 2021-01-29 | 海洋石油工程（青岛）有限公司 | Double-side welding process method for dual-phase steel explosion-proof wall |
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Application publication date: 20180713 |