CN104476010A - High-entropy alloy welding wire for welding titanium/stainless steel in TIG (Tungsten Inert Gas) mode and application - Google Patents
High-entropy alloy welding wire for welding titanium/stainless steel in TIG (Tungsten Inert Gas) mode and application Download PDFInfo
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- CN104476010A CN104476010A CN201410787004.9A CN201410787004A CN104476010A CN 104476010 A CN104476010 A CN 104476010A CN 201410787004 A CN201410787004 A CN 201410787004A CN 104476010 A CN104476010 A CN 104476010A
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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
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
-
- 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
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3033—Ni as the principal constituent
-
- 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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a high-entropy alloy welding wire for welding titanium/stainless steel in a TIG (Tungsten Inert Gas) mode. The high-entropy alloy welding wire is formed by the following components in atomic percent with the total percent of 100 percent: 5 percent of Ti, 5 percent to 10 percent of Fe, 25 percent to 30 percent of Cr, 25 percent to 35 percent of Cu, and 25 percent to 35 percent of Ni. The invention also discloses a method for using the high-entropy alloy welding wire to weld the titanium/ the stainless steel in the TIG mode. The welding material cost is low, the preparation is simple, the welding method is convenient and easy to implement, the adaptability is wide, and an obtained titanium and stainless steel welded joint is good in formation of weld, free of cracks, high in intensity and good in toughness.
Description
Technical field
The invention belongs to technical field of welding materials, relate to a kind of for TIG weldering titanium/stainless high-entropy alloy welding wire, the invention still further relates to this high-entropy alloy welding wire of application to titanium/stainless TIG soldering method.
Background technology
The bridge post of important pressure vessels for the chemical industry, bridge spanning the sea and the anticorrosion liner plate of ultra-large type floating marine structure, be nearly all adopt the coated stainless composite construction of titanium, the key preparing titanium/stainless steel composite structural member to solve titanium and stainless Welding Problems.
At present, argon arc welding for welding titanium/stainless main method, because the process based prediction model such as linear expansion coefficient, thermal conductivity of titanium and steel exists larger difference, weld zone very easily forms crackle, weld seam forms a large amount of firmly crisp intermetallic compound (TiFe, TiFe2, NiTi, TiCr, TiC), and strength of joint is lower.
Raw for stopping brittle intermetallic produce from source, using suitable welding material to be the key of dealing with problems, is also the fundamental solution improving titanium/steel welded joint quality.
High-entropy alloy breaches the Design Mode of conventional alloys, by high entropic effect, makes the structure organization of alloy be tending towards single bcc or fcc solid solution, effectively can suppress the generation of intermetallic compound, for the high-performance welding realizing titanium/steel provides brand-new technical thought.
Summary of the invention
The object of this invention is to provide and a kind of weld titanium/stainless high-entropy alloy welding wire for TIG, when solving the titanium existed in prior art melting welding direct with stainless steel, easily form a large amount of brittle intermetallic thing in weld seam and cause ftractureing, the problem that intensity is lower.
Another object of the present invention is to provide a kind of this high-entropy alloy welding wire of application to titanium/stainless TIG soldering method.
The technical solution adopted in the present invention is, a kind of TIG of being used for welds titanium/stainless high-entropy alloy welding wire, is made up of by atomic percent following component, total percentage is 100%, and wherein Ti is fixed as 5%, Fe is 5%-10%, Cr is 25%-30%, Cu be 25%-35%, Ni is 25%-35%.
Another technical scheme that the present invention adopts is, a kind of this high-entropy alloy welding wire of application, to titanium/stainless TIG soldering method, is implemented according to following steps:
Step 1) to the bevel process respectively of titanium/stainless mother metal;
Step 2) cleaning, polishing groove, remove the greasy dirt on two kinds of mother metal surfaces and impurity;
Step 3) at titanium and stainless steel lower surface, backing plate is installed, backing plate upper surface is horizontally arranged with Ar conductance chute, by fixed with backing plate while of titanium and stainless steel, and titanium and stainless gap is made to be positioned at directly over the Ar conductance chute center line of backing plate upper surface;
Step 4) two-sided logical Ar gas shielded is implemented to titanium and stainless groove position, pass into argon gas 3 ~ 5s in advance before weldering;
Step 5) implement TIG weldering;
Step 6) postwelding continues to pass into Ar gas 3-5s, then unclamps rapidly permanent plant and backing plate.
The invention has the beneficial effects as follows, this high-entropy alloy welding wire has excellent intensity, toughness and corrosion resisting property, not easily forms brittle intermetallic phase, is easy to obtain high performance titanium/stainless steel welded joint; Use the welding procedure of this high-entropy alloy welding wire simple, do not need in advance at titanium side deposition transition zone, without the need to frequently changing welding wire and conversion welding parameter in welding process, convenience and high-efficiency, high-entropy alloy composition range is wide in range, good to different trade mark base metals adaptability, is convenient to promote.
Accompanying drawing explanation
Fig. 1 is titanium and stainless steel welded joint form and bevel shape figure in the present invention;
Fig. 2 is the assemble welding schematic diagram of high-entropy alloy welding wire of the present invention in TIG weldering process.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Of the present inventionly weld titanium/stainless high-entropy alloy welding wire for TIG, be made up of by atomic percent following component, total percentage is 100%, and wherein to fix Ti be 5%, Fe be 5%-10%, Cr be 25%-30%, Cu be 25%-35%, Ni is 25%-5%.
In high-entropy alloy component of weld wire of the present invention, reason is limited to each chemical element composition and content and is described below respectively:
In order to improve the comprehensive mechanical property of titanium/stainless steel welded joint, needing to obtain metal chemical composition and being in the pivot content range forming high-entropy alloy.For mother metal titanium to be welded and stainless composition characteristic, welding wire selects Ti-Fe-Cr-Cu-Ni five pivot high-entropy alloy.Main cause has 3 points: 1. in welding process the fusing of mother metal and Jin Feng district mother metal inevitable to the dissolving in molten bath, brittle intermetallic thing is produced for preventing weld seam, Ti, Fe pivot must be contained in weld seam target component, and the content of these two kinds of elements in welding wire will lower than other pivot; Because the solvability of Ti element in weld seam is greater than Fe, so the content of Ti is lower in welding wire, the content of Fe is then relatively high.2. Cr element both can solid solution unlimited with Fe, can balance again the Cr element in stainless stainless steel.3. Cu segregation is in interdendritic, can improve joint plasticity, and Ni and Ti and Fe all can infinitely solid solution, can effectively suppress brittle intermetallic produce raw.Like this, the welding wire of application choice is through welding process, and the weld metal of formation is appointed and so belonged to high-entropy alloy scope, substantially eliminates brittle intermetallic thing, and the joint performance obtained is higher.
Take each high pure metal component, molten joining is carried out in said components mixing in ultravacuum electric arc furnaces, obtained foundry alloy, applied metal is twisted flax fibers and woven technology, and by the foundry alloy refuse obtained, the rapid solidification through wheel of twisting flax fibers and weaving is prepared into high-entropy alloy gold solder silk.
The present invention applies this high-entropy alloy welding wire to titanium/stainless TIG soldering method, implements according to following steps:
Step 1) bevel process is distinguished to the mother metal of titanium-stainless, total opening angle of titanium embodiment illustrated in fig. 1 and stainless steel welded place groove is 60 °, and the bottom thickness of titanium mother metal groove is 1mm;
Step 2) conscientiously clear up, groove of polishing, remove the two kinds of mother metals surface especially greasy dirt in groove region and impurity;
Step 3) assemble mother metal according to Fig. 2, at titanium and stainless steel lower surface, backing plate is installed, backing plate upper surface is horizontally arranged with Ar conductance chute, by fixed with backing plate while of titanium and stainless steel, gap between the mother metal of titanium-stainless is 1mm, and makes titanium and stainless gap be positioned at directly over the Ar conductance chute center line of backing plate upper surface;
Step 4) two-sided logical Ar gas shielded (Ar gas purity >99.9%) is implemented to titanium and stainless groove position, namely in Ar conductance chute, Ar gas is led to below, Ar gas is led to above at groove position of upper, pass into argon gas 3 ~ 5s in advance before weldering;
Step 5) implement TIG weldering, technological parameter is: before weldering, mother metal is preheating to 140-160 DEG C, Ar throughput is 8-10L/min, and welding current is 65-80A, and speed of welding is 50-60mm/min; In addition, in welding process, control electric arc and should slightly be partial to stainless steel side, make the more even of both sides mother metal fusing;
Step 6) postwelding continues to pass into Ar gas 3-5s, and namely upper/lower positions continues logical Ar gas in welded joints, stagnant protection after realizing, then unclamps rapidly fixture and backing plate, prevents weld seam from producing stress cracking.
Embodiment 1
Be 100% according to total atomic percent, according to Ti be 5%, Fe is 5%, Cr is 30%, Cu is 30%, Ni 30% chooses each constituent content, and prepares according to above-mentioned embodiment the Ti5Fe5Cr30Cu30Ni30 high-entropy alloy welding wire that diameter is 1.2mm.Application TIG weldering is welded with 1Cr18Ni9 stainless steel the TC4 titanium that 5mm is thick, and welding method is described above, and concrete welding condition is: before weldering, mother metal is preheating to 150 DEG C, Ar throughput 10L/min, welding current 70A, stagnant 4s after speed of welding 60mm/min, Ar gas.
Detect and find: weld metal amalgamation is good, fusion area flawless, observe through metallographic structure, seam organization presents gradient layer distribution from center to both sides mother metal melt run, be fine and close equiax crystal and column crystal near melt run, then grow to Weld pipe mill with dendrite form, phase structure is made up of single fcc and bcc, and the tensile strength obtaining welding point is 220Mpa.
Embodiment 2
Be 100% according to total atomic percent, according to each constituent content of data decimation that Ti is 5%, Fe is 10%, Cr is 25%, Cu is 30%, Ni is 30%, and prepare according to above-mentioned embodiment the Ti5Fe10Cr25Cu30Ni30 high-entropy alloy welding wire that diameter is 1.4mm.Application TIG weldering is welded with 0Cr13 stainless steel the TB5 titanium that 5mm is thick, and welding method is described above, and concrete welding condition is: before weldering, mother metal is preheating to 150 DEG C, Ar throughput 9L/min, welding current 75A, stagnant 3s after speed of welding 60mm/min, Ar gas.
Detect and find: weld metal amalgamation is good, and joint is full, without surface pores, the defect such as to be mingled with, fusion area flawless, to observe through metallographic structure, seam organization be equiax crystal and the dendrite of densification substantially, and the tensile strength of acquisition welding point is 190Mpa.
Embodiment 3
Be 100% according to total atomic percent, according to each component element content of data decimation that Ti is 5%, Fe is 8%, Cr is 28%, Cu is 29%, Ni is 30%, and prepare according to above-mentioned embodiment the Ti5Fe8Cr28Cu29Ni30 high-entropy alloy welding wire that diameter is 1.2mm.Application TIG weldering is welded with 0Cr13 stainless steel the TA2 titanium that 5mm is thick, and welding method is described above, and concrete welding condition is: before weldering, mother metal is preheating to 140 DEG C, Ar throughput 9L/min, welding current 70A, stagnant 4s after speed of welding 50mm/min, Ar gas.
Detect and find: weld metal amalgamation is good, fusion area flawless, pore and the defect such as to be mingled with, observe through metallographic structure, seam organization be equiax crystal and the dendrite of densification substantially, phase structure is single fcc solid solution, and the tensile strength obtaining welding point is 185Mpa.
Embodiment 4
Be 100% according to total atomic percent, according to each constituent content of data decimation that Ti is 5%, Fe is 6%, Cr is 29%, Cu is 25%, Ni is 35%, and prepare according to above-mentioned embodiment the Ti5Fe6Cr29Cu25Ni35 high-entropy alloy welding wire that diameter is 1.2mm.Application TIG weldering is welded with 0Cr13 stainless steel the TC4 titanium that 5mm is thick, and welding method is described above, and concrete welding condition is: before weldering, mother metal is preheating to 150 DEG C, Ar throughput 9L/min, welding current 65A, stagnant 4s after speed of welding 55mm/min, Ar gas.
Detect and find: weld metal amalgamation is good, fusion area flawless, observe through metallographic structure, seam organization is fine and close equiax crystal and dendrite substantially, and the tensile strength obtaining welding point is 185Mpa.
Embodiment 5
Be 100% according to total atomic percent, according to each constituent content of data decimation that Ti is 5%, Fe is 5%, Cr is 25%, Cu is 30%, Ni is 35%, and prepare according to above-mentioned embodiment the Ti5Fe8Cr28Cu29Ni30 high-entropy alloy welding wire that diameter is Φ 1.2mm.Application TIG weldering is welded with 1Cr18Ni9 stainless steel the TA2 titanium that 5mm is thick, and welding method is described above, and concrete welding condition is: before weldering, mother metal is preheating to 160 DEG C, Ar throughput 9L/min, welding current 70A, stagnant 4s after speed of welding 60mm/min, Ar gas.
Detect and find: weld metal amalgamation is good, fusion area flawless, observe through metallographic structure, seam organization is fine and close equiax crystal and dendrite substantially, and the tensile strength obtaining welding point is about 185Mpa.
In sum, high-entropy alloy of the present invention, application vacuum arc melting makes, and composition proportion is wide in range, and the high-entropy alloy component of weld wire that rapid solidification obtains is even, and be applied in welding process in TIG weldering simple, the seam properties of postwelding meets the requirements.
Claims (4)
1. weld titanium/stainless high-entropy alloy welding wire for TIG, its feature is: be made up of by atomic percent following component, and total percentage is 100%, wherein Ti is fixed as 5%, Fe be 5%-10%, Cr is 25%-30%, Cu is 25%-35%, Ni is 25%-35%.
2. the high-entropy alloy welding wire of application rights requirement described in 1 is to titanium/stainless TIG soldering method, and its feature is, implements according to following steps:
Step 1) to the bevel process respectively of titanium/stainless mother metal;
Step 2) cleaning, polishing groove, remove the greasy dirt on two kinds of mother metal surfaces and impurity;
Step 3) at titanium and stainless steel lower surface, backing plate is installed, backing plate upper surface is horizontally arranged with Ar conductance chute, by fixed with backing plate while of titanium and stainless steel, and titanium and stainless gap is made to be positioned at directly over the Ar conductance chute center line of backing plate upper surface;
Step 4) two-sided logical Ar gas shielded is implemented to titanium and stainless groove position, pass into argon gas 3 ~ 5s in advance before weldering;
Step 5) implement TIG weldering;
Step 6) postwelding continues to pass into Ar gas 3-5s, then unclamps rapidly permanent plant and backing plate.
3. high-entropy alloy welding wire according to claim 2 is to titanium/stainless TIG soldering method, and its feature is, described step 1) in, total opening angle of titanium and mild steel weld groove is 60 °.
4. high-entropy alloy welding wire according to claim 2 is to titanium/stainless TIG soldering method, its feature is, described step 5) in, technological parameter is: before weldering, mother metal is preheating to 140-160 DEG C, welding current is 65-80A, speed of welding 50-60mm/min.
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| CN107999991A (en) * | 2018-01-22 | 2018-05-08 | 太原理工大学 | High entropy flux-cored wire for titanium-steel MIG welding and preparation method thereof |
| CN108161277A (en) * | 2018-01-22 | 2018-06-15 | 太原理工大学 | High entropy flux-cored wire for aluminium-steel submerged arc welding and preparation method thereof |
| CN108161278A (en) * | 2018-01-22 | 2018-06-15 | 太原理工大学 | High entropy flux-cored wire for aluminium-steel MIG welding and preparation method thereof |
| CN108161276A (en) * | 2018-01-22 | 2018-06-15 | 太原理工大学 | High entropy flux-cored wire for magnesium-steel MIG welding and preparation method thereof |
| CN109955004A (en) * | 2019-04-30 | 2019-07-02 | 上海交通大学 | A kind of high entropy alloy material and application for welding |
| CN110936680A (en) * | 2019-12-17 | 2020-03-31 | 南京工业大学 | Intermediate alloy for titanium/carbon steel bimetal compounding and compounding process |
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| CN115870591A (en) * | 2023-02-20 | 2023-03-31 | 天津市金桥焊材科技有限公司 | MIG welding process method for titanium-steel dissimilar metal and welding wire used in MIG welding process method |
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