CN106216835B - A kind of laser lap connection method of Mo Re alloys foil - Google Patents
A kind of laser lap connection method of Mo Re alloys foil Download PDFInfo
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- CN106216835B CN106216835B CN201610704744.0A CN201610704744A CN106216835B CN 106216835 B CN106216835 B CN 106216835B CN 201610704744 A CN201610704744 A CN 201610704744A CN 106216835 B CN106216835 B CN 106216835B
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
- B23K26/323—Bonding taking account of the properties of the material involved involving parts made of dissimilar metallic material
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
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- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention belongs to Metal Material Welding field, more particularly to a kind of laser lap connection method of Mo Re alloys thin material.This method uses YAG (Nb3+) NC laser welded, welding condition is：Laser energy 15%~19%, speed of welding 20 25mm/min, pulse frequency 50Hz, carry out single welding；Laser beam steady operation is kept in welding process, in whole process inert gas shielding synchronous inflation should be kept to carry out, gas flow is controlled in 15~25L/min；Using the relatively low austenite stainless steel plate of thermal conductivity as pad.Using the present invention, it is possible to achieve effective connection of Mo Re alloys foil, the welding point for the defects of obtaining pore-free, flawless, joint quality are stable.And present invention process is simple, cost is relatively low, disclosure satisfy that Mo Re alloys foil structure Welded Joints quality and intensity makes requirement substantially.
Description
Technical field
The invention belongs to Metal Material Welding field, is related to a kind of welding method of refractory metal, more particularly to a kind of molybdenum
The laser lap connection method of rhenium alloys thin material.
Background technology
Mo Re alloys because it has excellent high-temperature creep resistance, low-temperature flexibility and wear-resistant, corrosion resistance,
It is widely used in chemical industry, metallurgy, electronics, Aero-Space, nuclear industry and national defense and military fields, for example, it is extreme tight
The heat of electronic component, radar antenna part, vacuum melting part, thermocouple and the nuclear reactor for space used under the conditions of cruel from
Sub- exchanger part etc..At present in Mo Re alloys especially with the combination property of Mo50-Re50 alloys more, its room temperature tensile intensity is high
In 1000MPa, often it is prepared into foil or silk material is used.And during use, foundation current material forming technique,
The welding research of Mo Re alloys is essential, but high-melting-point (2500 DEG C or so) characteristic that Mo Re alloys have has a strong impact on its shape
Into excellent welding point, and then hinder its application.
The research of Mo Re alloys welding technique is also fewer at present, mainly includes electron beam weldering, laser using welding method
Weldering, resistance spot welding, soldering and friction welding (FW) etc..The welding being directed to Mo Re alloys foil (thickness is less than 0.2mm) only has pricker
Weldering and resistance are welded two kinds of techniques, and Mo Re alloys foil easily produces the phenomenon burnt in high energy welding method, and then
Effective connection can not be realized.Simultaneously because in the welding process such as resistance spot welding, Laser Welding, electron beam weldering, molybdenum-rhenium can be caused to close
Gold inhales the segregation of C, O, N forming component, thermal stress and causes crackle to exist, and forms stomata sometimes, can reduce the mechanics of joint
Performance.
For Mo Re alloys welding, compared to soldering processes, high energy welding method is still to obtain high mechanical property
The more suitable method of energy joint.And for Mo Re alloys foil (thickness is less than 0.2mm), do not burn premise in guarantee foil
Under, effective connection of foil is realized, and the generation for being capable of effectively Crack prevention, stomata etc. is most important.Relevant molybdenum-rhenium foil
Welding only has the research in terms of resistance spot welding process, in terms of Laser Welding or the electron beam weldering of not yet seeing Mo Re alloys foil at present
Research or report.
The content of the invention
The present invention is to make up refractory metal Mo Re alloys foil welding aspect the deficiencies in the prior art, there is provided a kind of
The Joining Technology method overlapped using quick, low-energy laser, is realized effective connection of Mo Re alloys foil, obtains excellent molybdenum
The lap joint of rhenium alloys.
The present invention proposes a kind of connection method of the laser lap of Mo Re alloys foil, comprises the following steps to realize：
(1) Mo Re alloys foil surface preweld cleaning；
(2) Mo Re alloys foil overlap joint is fixed and assembles；
(3) lead to inert gas before welding and gas shield is carried out to overlap joint bonding pad；
(4) YAG (Nb are used3+) NC laser welded, welding condition is：Laser energy 15%~19%,
Speed of welding 20-25mm/min, pulse frequency 50Hz, carry out single welding；Laser beam steady operation is kept in welding process, whole
Inert gas shielding should keep synchronous inflation to carry out during individual, and gas flow is controlled in 15~25L/min；Using thermal conductivity compared with
Low austenite stainless steel plate is as pad；
(5) welded piece is placed in 400 DEG C of box drying oven after the completion of welding, and furnace cooling, is cooled to room temperature
After take out workpiece.
In step (1), preweld cleaning refers to the greasy dirt and oxide-film for removing Mo Re alloys surface, makes its surface as bright and clean as possible
With without any impurity, and drying is cleaned, near emphasis cleaning overlap joint land.The method for cleaning on Mo Re alloys surface is：With
1200# sand paper polishes on the effective overlap surface of Mo Re alloys foil totally, and non-overlap is polished using 1000# sand paper,
It is set to spill metallic luster；Then grinding process sample is put into the glass container of acetone, carried out at a temperature of 40 DEG C
Ultrasonic wave cleans 25min, then carries out secondary cleaning with alcohol and dries up.
In step (2), Mo Re alloys foil overlap joint is fixed and assembling uses prior art, i.e., has in Mo Re alloys foil
Imitate overlap coating common metal and bond glue, then carried out lap joint both ends using miniature stationary fixture effectively fixed.
In the step (3), logical inert gas Ar gas is protected, and is 99.9% by flow for 15~25L/min
Ar prevents that C, N, O etc. are to Mo Re alloys foil in air by the tiltedly lower 45 ° protections of blowing of gas nozzle synchronous laser processing district
Intrusion in laser lap welding process, and then cause segregation, embrittlement and cause the illeffects such as stomata.Environment temperature during welding
Degree is maintained at 25~30 DEG C.
In the step (4), using peak power 500W YAG laser, laser energy represents power during welding
Percentage.The percentage of laser energy welded every time is fixed by adjusting laser control panel.It is most important during laser welding
Parameter is laser energy, at present if to obtain optimal welding point in the present invention, it is necessary to control within 15%~19%,
During less than the scope, the Mo Re alloys overlap energy deficiency of overlap joint, the not up to fusing point of metal, metallurgical binding will not be formed；
Higher than the scope, although high-energy promotes metal molten, meeting transition fusing, the direct fusing of overlap metal is caused, also not
Metallurgical binding (effectively welding) can be formed.Speed of welding should not be too low, too low that energy can be caused to concentrate on the metallic bone area time
It is longer, cause to fuse, the too fast energy that overlap can be caused to obtain deficiency.The welded piece back side does not use cooling sliding block or cooling
Water system is to be able to provide certain high temperature hold time for overlap joint weld zone, avoids because heat conduction promotes joint to produce soon
Crackle；The heat of weld zone significantly more efficient can be delayed to pass to compared with Steel Work platform using austenite stainless steel sleeve,
Promote effective connection in weld area.During welding, gas flow is controlled in 15~25L/min, is by routine on one side
The limitation of Ar storage pressure valves, it is that the scope can make gas both ensure continuously to supply in addition, and can reduces and reserves gas pressure
It is excessive may be to the influence of weld zone metal.
In the step (5), postwelding is put the workpiece in rapidly in 400 DEG C of box drying ovens, and one is to be able to avoid welding
Connect area ambient gas C, N, O two subintrusion (in the case of protection is bad, may be invaded on a small quantity in welding process)；Prolong second, playing
The cooling velocity of slow weld zone, avoids cracking；Three are to be able to promote not volatilizing in laser beam welding for part
Metal bond glue further volatilize, avoid pollute weld metal.
Using the laser lap connection method of Mo Re alloys foil proposed by the present invention, it is possible to achieve Mo Re alloys foil
Effectively connection, the welding point for the defects of obtaining pore-free, flawless, joint quality are stable.Mo Re alloys proposed by the present invention
The welding method of foil has technique is simple, cost is relatively low, is easy to implement quick connection to promote, and disclosure satisfy that Mo Re alloys foil
Structure Welded Joints quality and intensity make requirement substantially.
Embodiment
Below by non-limiting embodiment, the present invention is further illustrated
Embodiment 1
The present embodiment is using Mo50-Re50 alloys foil as welded piece, and foil size is 8mm × 40mm, thickness
0.12mm, overlap size are 8mm × 5mm.
Specific Mo50-Re50 alloy foil laser lap welding procedure steps are as follows：
(1) will be polished at Mo50-Re50 alloy foil overlaps 8mm × 5mm with sand paper, other non-overlaps will also be carried out
Polishing, overlapping regions surface is spilt metallic luster, and welded piece is cleaned using ultrasonic washing instrument.Specific method
For：The effective overlap surface of Mo Re alloys foil is polished totally with 1200# sand paper, non-overlap is carried out using 1000# sand paper
Polishing, makes it spill metallic luster；Then grinding process sample is put into the glass container of acetone, at a temperature of 40 DEG C
Ultrasonic wave cleaning 25min is carried out, then secondary cleaning is carried out with alcohol and dries up.
(2) Mo Re alloys overlap is fixed using common metal bonding glue and effectively assembled, it is to be welded.
(3) protected before weldering using inert gas Ar gas by outgassing nozzle and be soldered area, environment temperature is maintained at during welding
25 DEG C~30 DEG C.Flow is oblique lower 45 ° by gas nozzle synchronous laser processing district for 15~25L/min 99.9% Ar
Angle, which is blown, to be protected.
(4) YAG (Nb are used3+) NC laser welded.Welding condition is：(the power of laser energy 15%
75W), speed of welding 25mm/min, pulse frequency 50Hz, single welding is carried out.
(5) laser beam steady operation is kept in welding process, in whole process Ar gas shieldeds should keep synchronously inflating into
OK, gas flow control is in 15~25L/min；Using the relatively low austenite stainless steel plate of thermal conductivity as pad.
(6) after welding, welded piece is placed on temperature and had been held in 400 DEG C of box drying oven, close baking oven
Power supply, make welding workpiece furnace cooling, workpiece can be taken out from baking oven after being cooled to room temperature.
Mo Re alloys (Mo50-Re50) the laser lap joint shaping obtained using said welding method is good, by weldering
Seam visual examination and metallography microscope sem observation do not find the microdefects such as crackle, stomata, mechanical properties up to 574MPa,
Result of the test is shown in Table 1.Meet the basic requirement for being connected workpiece.
The Mo Re alloys laser lap joint of table 1 and mother metal test for tensile strength result
Embodiment 2
The present embodiment is using Mo50-Re50 alloys foil as welded piece, and foil size is 6mm × 40mm, thickness
0.12mm, overlap size are 6mm × 5mm.
Specific Mo50-Re50 alloy foil laser lap welding procedure steps are as follows：
(1) will be polished at Mo50-Re50 alloy foil overlaps 6mm × 5mm with sand paper, other non-overlaps will also be carried out
Polishing, overlapping regions surface is spilt metallic luster, and welded piece is cleaned using ultrasonic washing instrument.Specific method
For：The effective overlap surface of Mo Re alloys foil is polished totally with 1200# sand paper, non-overlap is carried out using 1000# sand paper
Polishing, makes it spill metallic luster；Then grinding process sample is put into the glass container of acetone, at a temperature of 40 DEG C
Ultrasonic wave cleaning 25min is carried out, then secondary cleaning is carried out with alcohol and dries up.
(2) Mo Re alloys overlap is fixed using common metal bonding glue and effectively assembled, it is to be welded.
(3) protected before weldering using inert gas Ar gas by outgassing nozzle and be soldered area, environment temperature is maintained at during welding
25 DEG C~30 DEG C.Flow is oblique lower 45 ° by gas nozzle synchronous laser processing district for 15~25L/min 99.9% Ar
Angle, which is blown, to be protected.
(4) YAG (Nb are used3+) NC laser welded.Welding condition is：(the power of laser energy 17%
85W), speed of welding 25mm/min, pulse frequency 50Hz, single welding is carried out.
(5) laser beam steady operation is kept in welding process, in whole process Ar gas shieldeds should keep synchronously inflating into
OK, gas flow control is in 15~25L/min；Using the relatively low austenite stainless steel plate of thermal conductivity as pad.
(6) after welding, welded piece is placed on temperature and had been held in 400 DEG C of box drying oven, close baking oven
Power supply, make welding workpiece furnace cooling, workpiece can be taken out from baking oven after being cooled to room temperature.
Mo Re alloys (Mo50-Re50) the laser lap joint shaping obtained using said welding method is good, by weldering
Seam visual examination and metallography microscope sem observation do not find the microdefects such as crackle, stomata, mechanical properties up to 523MPa,
Result of the test is shown in Table 2.Meet the basic requirement for being connected workpiece.
The Mo Re alloys laser lap joint of table 2 and mother metal test for tensile strength result
Embodiment 3
The present embodiment is using Mo50-Re50 alloys foil as welded piece, and foil size is 6.5mm × 40mm, thickness
0.12mm, overlap size are 6.5mm × 5mm.
Specific Mo50-Re50 alloy foil laser lap welding procedure steps are as follows：
(1) will be polished at Mo50-Re50 alloy foil overlaps 6.5mm × 5mm with sand paper, other non-overlaps will also enter
Row polishing, overlapping regions surface is spilt metallic luster, and welded piece is cleaned using ultrasonic washing instrument.Specific side
Method is：The effective overlap surface of Mo Re alloys foil is polished totally with 1200# sand paper, non-overlap is entered using 1000# sand paper
Row polishing, makes it spill metallic luster；Then grinding process sample is put into the glass container of acetone, in 40 DEG C of temperature
Lower progress ultrasonic wave cleaning 25min, then carries out secondary cleaning with alcohol and dries up.
(2) Mo Re alloys overlap is fixed using common metal bonding glue and effectively assembled, it is to be welded.
(3) protected before weldering using inert gas Ar gas by outgassing nozzle and be soldered area, environment temperature is maintained at during welding
25 DEG C~30 DEG C.Flow is oblique lower 45 ° by gas nozzle synchronous laser processing district for 15~25L/min 99.9% Ar
Angle, which is blown, to be protected.
(4) YAG (Nb are used3+) NC laser welded.Welding condition is：(the power of laser energy 19%
95W), speed of welding 25mm/min, pulse frequency 50Hz, single welding is carried out.
(5) laser beam steady operation is kept in welding process, in whole process Ar gas shieldeds should keep synchronously inflating into
OK, gas flow control is in 15~25L/min；Using the relatively low austenite stainless steel plate of thermal conductivity as pad.
(6) after welding, welded piece is placed on temperature and had been held in 400 DEG C of box drying oven, close baking oven
Power supply, make welding workpiece furnace cooling, workpiece can be taken out from baking oven after being cooled to room temperature.
Mo Re alloys (Mo50-Re50) the laser lap joint shaping obtained using said welding method is good, by weldering
Seam visual examination and metallography microscope sem observation do not find the microdefects such as crackle, stomata, mechanical properties up to 496MPa,
Result of the test is shown in Table 3.Meet the basic requirement for being connected workpiece.
The Mo Re alloys laser lap joint of table 3 and mother metal test for tensile strength result
Embodiment 4
The present embodiment is using Mo50-Re50 alloys foil as welded piece, and foil size is 8mm × 40mm, thickness
0.18mm, overlap size are 7mm × 5mm.
Specific Mo50-Re50 alloy foil laser lap welding procedure steps are as follows：
(1) will be polished at Mo50-Re50 alloy foil overlaps 7mm × 5mm with sand paper, other non-overlaps will also be carried out
Polishing, overlapping regions surface is spilt metallic luster, and welded piece is cleaned using ultrasonic washing instrument.Specific method
For：The effective overlap surface of Mo Re alloys foil is polished totally with 1200# sand paper, non-overlap is carried out using 1000# sand paper
Polishing, makes it spill metallic luster；Then grinding process sample is put into the glass container of acetone, at a temperature of 40 DEG C
Ultrasonic wave cleaning 25min is carried out, then secondary cleaning is carried out with alcohol and dries up.
(2) Mo Re alloys overlap is fixed using common metal bonding glue and effectively assembled, it is to be welded.
(3) protected before weldering using inert gas Ar gas by outgassing nozzle and be soldered area, environment temperature is maintained at during welding
25 DEG C~30 DEG C.Flow is oblique lower 45 ° by gas nozzle synchronous laser processing district for 15~25L/min 99.9% Ar
Angle, which is blown, to be protected.
(4) YAG (Nb are used3+) NC laser welded.Welding condition is：(the power of laser energy 16%
80W), speed of welding 23mm/min, pulse frequency 50Hz, single welding is carried out.
(5) laser beam steady operation is kept in welding process, in whole process Ar gas shieldeds should keep synchronously inflating into
OK, gas flow control is in 15~25L/min；Using the relatively low austenite stainless steel plate of thermal conductivity as pad.
(6) after welding, welded piece is placed on temperature and had been held in 400 DEG C of box drying oven, close baking oven
Power supply, make welding workpiece furnace cooling, workpiece can be taken out from baking oven after being cooled to room temperature.
Mo Re alloys (Mo50-Re50) the laser lap joint shaping obtained using said welding method is good, by weldering
Seam visual examination and metallography microscope sem observation do not find the microdefects such as crackle, stomata, due to the increase of thickness of slab, cause it to take
It is narrower to connect laser join domain, influences its tensile property, mechanical properties are shown in Table 4 up to 427MPa, result of the test.Basic energy
Enough meet its requirement.
The Mo Re alloys laser lap joint of table 4 and mother metal test for tensile strength result
Embodiment 5
The present embodiment is using Mo50-Re50 alloys foil as welded piece, and foil size is 8mm × 40mm, thickness
0.18mm, overlap size are 7mm × 5mm.
Specific Mo50-Re50 alloy foil laser lap welding procedure steps are as follows：
(1) will be polished at Mo50-Re50 alloy foil overlaps 7mm × 5mm with sand paper, other non-overlaps will also be carried out
Polishing, overlapping regions surface is spilt metallic luster, and welded piece is cleaned using ultrasonic washing instrument.Specific method
For：The effective overlap surface of Mo Re alloys foil is polished totally with 1200# sand paper, non-overlap is carried out using 1000# sand paper
Polishing, makes it spill metallic luster；Then grinding process sample is put into the glass container of acetone, at a temperature of 40 DEG C
Ultrasonic wave cleaning 25min is carried out, then secondary cleaning is carried out with alcohol and dries up.
(2) Mo Re alloys overlap is fixed using common metal bonding glue and effectively assembled, it is to be welded.
(3) protected before weldering using inert gas Ar gas by outgassing nozzle and be soldered area, environment temperature is maintained at during welding
25 DEG C~30 DEG C.Flow is oblique lower 45 ° by gas nozzle synchronous laser processing district for 15~25L/min 99.9% Ar
Angle, which is blown, to be protected.
(4) YAG (Nb are used3+) NC laser welded.Welding condition is：(the power of laser energy 18%
90W), speed of welding 20mm/min, pulse frequency 50Hz, single welding is carried out.
(5) laser beam steady operation is kept in welding process, in whole process Ar gas shieldeds should keep synchronously inflating into
OK, gas flow control is in 15~25L/min；Using the relatively low austenite stainless steel plate of thermal conductivity as pad.
(6) after welding, welded piece is placed on temperature and had been held in 400 DEG C of box drying oven, close baking oven
Power supply, make welding workpiece furnace cooling, workpiece can be taken out from baking oven after being cooled to room temperature.
Mo Re alloys (Mo50-Re50) the laser lap joint shaping obtained using said welding method is good, by weldering
Seam visual examination and metallography microscope sem observation do not find the microdefects such as crackle, stomata, and energy is improved compared to example 4, its
Overlap joint laser connection sector width has increased, and mechanical properties are shown in Table 5 up to 455MPa, result of the test.Substantially disclosure satisfy that
Its requirement.
The Mo Re alloys laser lap joint of table 5 and mother metal test for tensile strength result
Above-described embodiment is used only as the description of the invention, not limitation ot it.
Claims (2)
1. a kind of laser lap connection method of Mo Re alloys foil, it is characterized in that, including step is as follows：
(1) Mo Re alloys foil surface preweld cleaning；
(2) Mo Re alloys foil overlap joint is fixed and assembles；
(3) lead to inert gas before welding and gas shield is carried out to overlap joint bonding pad；
(4) Nb is used：YAG laser is welded, and welding condition is：Laser energy 15%~19%, speed of welding 20-
25mm/min, pulse frequency 50Hz, carry out single welding；Laser beam steady operation is kept in welding process, it is lazy in whole process
Property gas shield synchronous inflation should be kept to carry out, gas flow is controlled in 15~25L/min；Using austenite stainless steel plate conduct
Pad；
Described laser energy represents the percentage of peak power, peak power 500W；
(5) welded piece is placed in 400 DEG C of box drying oven after the completion of welding, and furnace cooling, is taken after being cooled to room temperature
Go out workpiece；
In the step (3), logical inert gas Ar gas is protected, and 99.9% Ar that flow is 15~25L/min is passed through
Gas nozzle synchronous laser processing district is tiltedly descended 45° angle degree to blow and protected.
2. the laser lap connection method of Mo Re alloys foil according to claim 1, it is characterized in that, in the step (1),
The method for cleaning on Mo Re alloys surface is：The effective overlap surface of Mo Re alloys foil is polished totally with 1200# sand paper, not taken
Meet area to be polished using 1000# sand paper, it is spilt metallic luster；Then grinding process sample is put into the glass of acetone
In glass container, ultrasonic wave cleaning 25min is carried out at a temperature of 40 DEG C, then secondary cleaning is carried out with alcohol and dries up.
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| CN107931806B (en) * | 2017-12-26 | 2020-09-08 | 山东建筑大学 | Micro-plasma arc welding method for molybdenum-rhenium alloy foil |
| CN108188521B (en) * | 2018-01-25 | 2020-10-02 | 山东建筑大学 | High-frequency induction heating brazing method for molybdenum-rhenium alloy foil |
| CN112975101B (en) * | 2019-12-13 | 2022-12-09 | 安泰天龙钨钼科技有限公司 | Method for diffusion welding of steel by molybdenum-rhenium alloy |
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