CN109848501A - A kind of high-intensitive method for welding for molybdenum-copper and stainless steel - Google Patents
A kind of high-intensitive method for welding for molybdenum-copper and stainless steel Download PDFInfo
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Abstract
The invention discloses a kind of high-intensitive method for welding for molybdenum-copper and stainless steel, include the following steps: that (1) surface cleaning processing, (2) surface modification treatment, the preparation of (3) solder, (4) material clamp processing, (5) soldering.The present invention has carried out special Optimal improvements to method for welding and has handled, its simple process, each step collocation is reasonable, it is easy to promote and utilize, treated strength of welded joint is high, stability is strong, and welding temperature is lower, has saved production cost, strong technical support, the great market competitiveness are provided for the production of high-quality workpiece.
Description
Technical field
The invention belongs to alloy working process technical fields, and in particular to a kind of for the high-strength of molybdenum-copper and stainless steel
Spend method for welding.
Background technique
Molybdenum-copper is to have both molybdenum by a kind of high-temperature material of the technologies such as powder metallurgy, infiltration preparation by molybdenum and copper
The features such as high-ductility of the features such as high intensity, high rigidity, low thermal coefficient of expansion and copper, electric-conductivity heat-conductivity high, excellent combination property,
It is widely used in electrical contact material, heat sink material and electronic package material etc..And this molybdenum-copper need in actual use with
The materials such as stainless steel carry out welding processing, but linear expansion coefficient because of the two and the capacity of heat transmission differ greatly, and will cause connector and easily produce
Raw biggish stress, and then cause to crack, it finally affects using quality and service life.
Welding manner is varied, such as the weldering of Solid-State Welding, liquid phase, soldering belong to Solid-State Welding, is a kind of common welding side
Formula, weldment is that large area is evenly heated around whole heating or brazed seam mostly when this soldering, therefore, the deflection of workpiece
And the residual stress ratio melting welding of soldered fitting is much smaller, is easy to guarantee the precise measure of workpiece.The research of Chinese Academy of Sciences's electronics
Used molybdenum manganese metal and nickel plating method for welding welding molybdenum-copper and Al2O3Ceramics have obtained the good sealing-in of air-tightness and have connect
Head.But it needs to carry out nickel plating to molybdenum-copper before welding, to Al2O3Ceramics carry out metallization and nickel plating, and welding sequence is more, is unfavorable for
It promotes and applies.In response to this problem, people have developed a large amount of method for welding, and such as application No. is CN201110429990.7
The vacuum active brazing process for disclosing a kind of molybdenum-copper and stainless steel passes through active solder and molybdenum under vacuum conditions
Complicated physical-chemical reaction between copper alloy and stainless steel realizes the sealed connection of molybdenum-copper and stainless steel, although obviously
The fastness of welding is improved, but the continuous promotion with market for properties of product and service life etc., this mode are also required to further
Optimal improvements.
Summary of the invention
The purpose of the present invention is being directed to existing problem, a kind of high-intensitive pricker for molybdenum-copper and stainless steel is provided
Soldering method.
The present invention is achieved by the following technical solutions:
A kind of high-intensitive method for welding for molybdenum-copper and stainless steel, includes the following steps:
(1) surface cleaning processing:
Molybdenum-copper, stainless steel are respectively put into degreasing fluid and carry out immersion oil removal treatment, takes out after 10 ~ 15min, then puts
Enter and be dried into drying box, is taken out after 20 ~ 25min, it is spare after finally being polished with sand paper；
(2) surface modification treatment:
Step (1) treated molybdenum-copper, stainless steel are put into ultraviolet irradiation case and carry out radiation treatment, 30 ~ 40min
After take out it is spare；
(3) prepared by solder:
A. attapulgite is submerged initially in 4 ~ 6min of immersion treatment in sulfuric acid solution, is immersed in sodium hydroxide solution again after taking-up
5 ~ 8min of immersion treatment, finally taking-up are spare after being rinsed one time with deionized water；
B. will operation a treated that attapulgite is put into calcining furnace carries out calcination processing, the temperature for controlling calcining is 700 ~
750 DEG C, heat preservation calcining 1 ~ 2h after take out it is spare；
C. will operation b treated that attapulgite is immersed in 20 ~ 25min of immersion treatment in silane coupler solution, done after taking-up
It is dry spare；
D. will operation c treated attapulgite, aluminum phosphate, polyethylene glycol, uramit, zinc stearate it is corresponding according to weight ratio
6 ~ 8:18 ~ 22:5 ~ 7:2 ~ 5:0.2 ~ 0.4 is mixed, and is then put into and is carried out intermittent warming in alternating temperature case, first will be in alternating temperature case
It is heated to 110 ~ 120 DEG C, after 3 ~ 5min of isothermal holding, then alternating temperature case is warming up to 180 ~ 200 DEG C, 15 ~ 20min of isothermal holding
Afterwards, then by alternating temperature case 690 ~ 720 DEG C, 20 ~ 25min of isothermal holding are warming up to, must be reacted after finally taking out cooled to room temperature
Object A is spare；
E. it is spare to weigh following substance by corresponding parts by weight: 80 ~ 85 parts of silver, 13 ~ 17 parts of copper, 1 ~ 3 part of titanium, 2 ~ 4 parts of operation d are made
Reactant A, 0.1 ~ 0.2 portion of nitric acid rare earth salt, 0.3 ~ 0.6 part of disodium ethylene diamine tetraacetate；
F. the weighed silver of e, copper, titanium will be operated to mix and put into vacuum melting furnace jointly, heating is kept in vacuum melting furnace
Temperature is 1150 ~ 1180 DEG C, and vacuum gas-atomized powder is carried out after 35 ~ 40min of isothermal holding, take out after the completion mixture B is standby
With；
G. reactant A, nitric acid rare earth salt, ethylenediamine tetraacetic made from the weighed operation d of mixture B biconditional operation e made from f will be operated
Acetic acid disodium is put into jointly and carries out ball mill grinding processing in ball mill, takes out after 30 ~ 35min, finally again through pressure sintering, heat
It is spare that solder is made in processing, calendering processing and intermediate annealing step；
(4) material clamps processing:
Solder made from step (3) is placed in step (2), and treated between molybdenum-copper and stainless steel welding surface, then
It is assembled with fixture, the pressure for during which controlling sealing-in is 1 ~ 1.4MPa, and it is spare to obtain part to be welded after the completion；
(5) soldering:
By step (4), treated that part to be welded is put into vacuum brazing equipment carries out soldering, and it is cold to take out nature after the completion
But to after room temperature.
Further, degreasing fluid as described in step (1) is the acetone soln that mass fraction is 10 ~ 15%；The drying
It is 70 ~ 75 DEG C that the temperature in drying box is controlled when processing.
Further, when radiation treatment described in step (2) control ultraviolet irradiation case in irradiation power be 1200 ~
1400W, the wavelength of ultraviolet light are 300 ~ 320nm.
Further, the mass fraction of sulfuric acid solution described in step (3) operation a is 7 ~ 10%；The sodium hydroxide
The mass fraction of solution is 12 ~ 14%.
Further, the mass fraction of silane coupler solution described in step (3) operation c is 25 ~ 30%；Described
Silane coupling agent is silane coupling agent kh550, silane coupling agent kh560, any one in silane coupling agent kh570.
Further, it is any in lanthanum nitrate, cerous nitrate, yttrium nitrate that step (3), which operates nitric acid rare earth salt described in e,
It is a kind of.
Further, atomization gas used when vacuum gas-atomized powder described in step (3) operation f is nitrogen.
Further, pressure sintering processing time control pressing pressure described in step (3) operation g is 62 ~ 66MPa, is sintered
Temperature is 650 ~ 680 DEG C；The heat treatment is to carry out homogenization heat treatment to material, and the temperature for controlling processing is 550 ~ 580
DEG C, 10 ~ 12h of Shi Changwei；The described calendering processing and intermediate annealing process be the material after heat treatment is repeatedly rolled, and
Intermediate annealing process is carried out between rolling twice, controlled at 530 ~ 560 DEG C, 1 ~ 3h of Shi Changwei when the annealing.
Further, when soldering described in step (5) control vacuum brazing equipment in vacuum degree be 1 ~ 3 ×
10-4Pa, brazing temperature are 880 ~ 920 DEG C, when heat preservation a length of 12 ~ 16min.
It is still not strong enough for performances such as the intensity of weldment welding in the prior art, lead to the system of high-quality, high-performance original part
It makes certain bad using existing.To the process of this Optimal improvements of the present invention welding, hence it is evident that improve the quality of welding, protect
The quality of welding has been demonstrate,proved, has been laid a good foundation for the application of higher quality.Surface cleaning processing first wherein has been carried out to part to be welded, has been gone
In addition to the greasy dirt impurity etc. on surface, and surface oxidation film is eliminated, lays a good foundation for subsequent processing, then carried out table
Face modification carries out radiation treatment using surface of the ultraviolet irradiation to part to be welded, and activation improves part to be welded table well
The activity in face, conducive to the progress of subsequent welding reaction；Then the preparation of solder, the knot between existing solder and part to be welded have been carried out
It is not strong to close fusion faculty, easily leads to shakiness at pad and cracks, therefore has re-started the preparation of solder, first attapulgite is carried out
Soda acid immersion, calcination processing, effectively improve the specific surface area and absorption property of attapulgite, have then carried out silane idol
Join agent immersion treatment, silanization treatment has been carried out to attapulgite's surface, has improved merging between attapulgite and remaining ingredient
Attapulgite, aluminum phosphate, polyethylene glycol, uramit, zinc stearate have then been mixed and made into reactant A by respond, this
Reactant A be a kind of granular size be 400nm or so, the inorganic compound particles ingredient that hole size is 150nm or so, this ingredient
In subsequent welding, hole can be melted metal liquid immersion, play the role of riveting fastening, can enhance between organizing everywhere
Combination strength, and the consistency for promoting tissue can be filled, grain crystalline can be surrounded, promote solder crystal grain to occur certain brilliant
Lattice distortion prevents external force from crystal boundary occurs and draws shifting and deformation, promotes external force resistance, creep resistance, further improve a group fabric
Later solder is made again in the progress such as itself and silver, copper, titanium, nitric acid rare earth salt, disodium ethylene diamine tetraacetate hybrid process by matter, silver,
Copper, titanium are common solder ingredients, can be with molybdenum copper in order to enhance the nitric acid rare earth salt of welding effect addition to be welded and fixed
Alloy etc. forms cenotype, it will be apparent that improves mutual combination strength, while can also refine the particle of brazing welding, is promoted
Tissue intensity.
The present invention has the advantage that compared with prior art
The present invention has carried out special Optimal improvements to method for welding and has handled, simple process, and each step collocation is reasonable, convenient for pushing away
Wide application, treated strength of welded joint is high, stability is strong, and welding temperature is lower, has saved production cost, is Gao Pin
The production of matter workpiece provides strong technical support, the great market competitiveness.
Specific embodiment
Embodiment 1
A kind of high-intensitive method for welding for molybdenum-copper and stainless steel, includes the following steps:
(1) surface cleaning processing:
Molybdenum-copper, stainless steel are respectively put into degreasing fluid and carry out immersion oil removal treatment, takes out, is then placed in after 10min
It is dried in drying box, is taken out after 20min, it is spare after finally being polished with sand paper；
(2) surface modification treatment:
Step (1) treated molybdenum-copper, stainless steel are put into ultraviolet irradiation case and carry out radiation treatment, after 30min
It takes out spare；
(3) prepared by solder:
A. attapulgite is submerged initially in immersion treatment 4min in sulfuric acid solution, is immersed in sodium hydroxide solution and soaks again after taking-up
Bubble processing 5min, finally taking-up are spare after being rinsed one time with deionized water；
B. will operation a treated that attapulgite is put into calcining furnace carries out calcination processing, the temperature for controlling calcining is 700
DEG C, it is taken out after heat preservation calcining 1h spare；
C. will operation b treated that attapulgite is immersed in immersion treatment 20min in silane coupler solution, drying is standby after taking-up
With；
D. will operation c treated attapulgite, aluminum phosphate, polyethylene glycol, uramit, zinc stearate it is corresponding according to weight ratio
6:18:5:2:0.2 is mixed, and is then put into and is carried out intermittent warming in alternating temperature case, first will be heated to 110 DEG C in alternating temperature case,
After isothermal holding 3min, then alternating temperature case is warming up to 180 DEG C, after isothermal holding 15min, then alternating temperature case is warming up to 690 DEG C, protected
It is spare finally to obtain reactant A after taking-up cooled to room temperature by temperature processing 20min；
E. it is spare to weigh following substance by corresponding parts by weight: 80 parts of silver, 13 parts of copper, 1 part of titanium, reactant A made from 2 parts of operation d,
0.1 portion of nitric acid rare earth salt, 0.3 part of disodium ethylene diamine tetraacetate；
F. the weighed silver of e, copper, titanium will be operated to mix and put into vacuum melting furnace jointly, heating is kept in vacuum melting furnace
Temperature is 1150 DEG C, and vacuum gas-atomized powder is carried out after isothermal holding 35min, take out after the completion mixture B is spare；
G. reactant A, nitric acid rare earth salt, ethylenediamine tetraacetic made from the weighed operation d of mixture B biconditional operation e made from f will be operated
Acetic acid disodium is put into jointly and carries out ball mill grinding processing in ball mill, takes out after 30min, finally again through pressure sintering, Re Chu
It is spare that solder is made in reason, calendering processing and intermediate annealing step；
(4) material clamps processing:
Solder made from step (3) is placed in step (2), and treated between molybdenum-copper and stainless steel welding surface, then
It is assembled with fixture, the pressure for during which controlling sealing-in is 1MPa, and it is spare to obtain part to be welded after the completion；
(5) soldering:
By step (4), treated that part to be welded is put into vacuum brazing equipment carries out soldering, and it is cold to take out nature after the completion
But to after room temperature.
Further, degreasing fluid as described in step (1) is the acetone soln that mass fraction is 10%；At the drying
It is 70 DEG C that the temperature in drying box is controlled when reason.
Further, irradiation power when radiation treatment described in step (2) in control ultraviolet irradiation case is
1200W, the wavelength of ultraviolet light are 300 ~ 320nm.
Further, the mass fraction of sulfuric acid solution described in step (3) operation a is 7%；The sodium hydroxide is molten
The mass fraction of liquid is 12%.
Further, the mass fraction of silane coupler solution described in step (3) operation c is 25%；The silane
Coupling agent is silane coupling agent kh550.
Further, nitric acid rare earth salt described in step (3) operation e is lanthanum nitrate.
Further, atomization gas used when vacuum gas-atomized powder described in step (3) operation f is nitrogen.
Further, pressure sintering processing time control pressing pressure described in step (3) operation g is the temperature of 62MPa, sintering
It is 650 DEG C；The heat treatment is to carry out homogenization heat treatment to material, and the temperature for controlling processing is 550 DEG C, Shi Changwei 10h；
The described calendering processing and intermediate annealing process be the material after heat treatment is repeatedly rolled, and between rolling twice into
Row intermediate annealing process, controlled at 530 DEG C, Shi Changwei 1h when the annealing.
Further, when soldering described in step (5) control vacuum brazing equipment in vacuum degree be 1 ~ 3 ×
10-4Pa, brazing temperature are 880 DEG C, when heat preservation a length of 12min.
Embodiment 2
A kind of high-intensitive method for welding for molybdenum-copper and stainless steel, includes the following steps:
(1) surface cleaning processing:
Molybdenum-copper, stainless steel are respectively put into degreasing fluid and carry out immersion oil removal treatment, takes out, is then placed in after 13min
It is dried in drying box, is taken out after 22min, it is spare after finally being polished with sand paper；
(2) surface modification treatment:
Step (1) treated molybdenum-copper, stainless steel are put into ultraviolet irradiation case and carry out radiation treatment, after 35min
It takes out spare；
(3) prepared by solder:
A. attapulgite is submerged initially in immersion treatment 5min in sulfuric acid solution, is immersed in sodium hydroxide solution and soaks again after taking-up
Bubble processing 7min, finally taking-up are spare after being rinsed one time with deionized water；
B. will operation a treated that attapulgite is put into calcining furnace carries out calcination processing, the temperature for controlling calcining is 730
DEG C, it is taken out after heat preservation calcining 1.5h spare；
C. will operation b treated that attapulgite is immersed in immersion treatment 22min in silane coupler solution, drying is standby after taking-up
With；
D. will operation c treated attapulgite, aluminum phosphate, polyethylene glycol, uramit, zinc stearate it is corresponding according to weight ratio
7:20:6:4:0.3 is mixed, and is then put into and is carried out intermittent warming in alternating temperature case, first will be heated to 115 DEG C in alternating temperature case,
After isothermal holding 4min, then alternating temperature case is warming up to 190 DEG C, after isothermal holding 17min, then alternating temperature case is warming up to 710 DEG C, protected
It is spare finally to obtain reactant A after taking-up cooled to room temperature by temperature processing 22min；
E. it is spare to weigh following substance by corresponding parts by weight: 83 parts of silver, 16 parts of copper, 2 parts of titaniums, reactant A made from 3 parts of operation d,
0.15 portion of nitric acid rare earth salt, 0.5 part of disodium ethylene diamine tetraacetate；
F. the weighed silver of e, copper, titanium will be operated to mix and put into vacuum melting furnace jointly, heating is kept in vacuum melting furnace
Temperature is 1170 DEG C, and vacuum gas-atomized powder is carried out after isothermal holding 38min, take out after the completion mixture B is spare；
G. reactant A, nitric acid rare earth salt, ethylenediamine tetraacetic made from the weighed operation d of mixture B biconditional operation e made from f will be operated
Acetic acid disodium is put into jointly and carries out ball mill grinding processing in ball mill, takes out after 33min, finally again through pressure sintering, Re Chu
It is spare that solder is made in reason, calendering processing and intermediate annealing step；
(4) material clamps processing:
Solder made from step (3) is placed in step (2), and treated between molybdenum-copper and stainless steel welding surface, then
It is assembled with fixture, the pressure for during which controlling sealing-in is 1.2MPa, and it is spare to obtain part to be welded after the completion；
(5) soldering:
By step (4), treated that part to be welded is put into vacuum brazing equipment carries out soldering, and it is cold to take out nature after the completion
But to after room temperature.
Further, degreasing fluid as described in step (1) is the acetone soln that mass fraction is 13%；At the drying
It is 72 DEG C that the temperature in drying box is controlled when reason.
Further, irradiation power when radiation treatment described in step (2) in control ultraviolet irradiation case is
1300W, the wavelength of ultraviolet light are 300 ~ 320nm.
Further, the mass fraction of sulfuric acid solution described in step (3) operation a is 9%；The sodium hydroxide is molten
The mass fraction of liquid is 13%.
Further, the mass fraction of silane coupler solution described in step (3) operation c is 28%；The silane
Coupling agent is silane coupling agent kh560.
Further, nitric acid rare earth salt described in step (3) operation e is cerous nitrate.
Further, atomization gas used when vacuum gas-atomized powder described in step (3) operation f is nitrogen.
Further, pressure sintering processing time control pressing pressure described in step (3) operation g is the temperature of 64MPa, sintering
It is 670 DEG C；The heat treatment is to carry out homogenization heat treatment to material, and the temperature for controlling processing is 560 DEG C, Shi Changwei 11h；
The described calendering processing and intermediate annealing process be the material after heat treatment is repeatedly rolled, and between rolling twice into
Row intermediate annealing process, controlled at 550 DEG C, Shi Changwei 2h when the annealing.
Further, when soldering described in step (5) control vacuum brazing equipment in vacuum degree be 1 ~ 3 ×
10-4Pa, brazing temperature are 900 DEG C, when heat preservation a length of 14min.
Embodiment 3
A kind of high-intensitive method for welding for molybdenum-copper and stainless steel, includes the following steps:
(1) surface cleaning processing:
Molybdenum-copper, stainless steel are respectively put into degreasing fluid and carry out immersion oil removal treatment, takes out, is then placed in after 15min
It is dried in drying box, is taken out after 25min, it is spare after finally being polished with sand paper；
(2) surface modification treatment:
Step (1) treated molybdenum-copper, stainless steel are put into ultraviolet irradiation case and carry out radiation treatment, after 40min
It takes out spare；
(3) prepared by solder:
A. attapulgite is submerged initially in immersion treatment 6min in sulfuric acid solution, is immersed in sodium hydroxide solution and soaks again after taking-up
Bubble processing 8min, finally taking-up are spare after being rinsed one time with deionized water；
B. will operation a treated that attapulgite is put into calcining furnace carries out calcination processing, the temperature for controlling calcining is 750
DEG C, it is taken out after heat preservation calcining 2h spare；
C. will operation b treated that attapulgite is immersed in immersion treatment 25min in silane coupler solution, drying is standby after taking-up
With；
D. will operation c treated attapulgite, aluminum phosphate, polyethylene glycol, uramit, zinc stearate it is corresponding according to weight ratio
8:22:7:5:0.4 is mixed, and is then put into and is carried out intermittent warming in alternating temperature case, first will be heated to 120 DEG C in alternating temperature case,
After isothermal holding 5min, then alternating temperature case is warming up to 200 DEG C, after isothermal holding 20min, then alternating temperature case is warming up to 720 DEG C, protected
It is spare finally to obtain reactant A after taking-up cooled to room temperature by temperature processing 25min；
E. it is spare to weigh following substance by corresponding parts by weight: 85 parts of silver, 17 parts of copper, 3 parts of titaniums, reactant A made from 4 parts of operation d,
0.2 portion of nitric acid rare earth salt, 0.6 part of disodium ethylene diamine tetraacetate；
F. the weighed silver of e, copper, titanium will be operated to mix and put into vacuum melting furnace jointly, heating is kept in vacuum melting furnace
Temperature is 1180 DEG C, and vacuum gas-atomized powder is carried out after isothermal holding 40min, take out after the completion mixture B is spare；
G. reactant A, nitric acid rare earth salt, ethylenediamine tetraacetic made from the weighed operation d of mixture B biconditional operation e made from f will be operated
Acetic acid disodium is put into jointly and carries out ball mill grinding processing in ball mill, takes out after 35min, finally again through pressure sintering, Re Chu
It is spare that solder is made in reason, calendering processing and intermediate annealing step；
(4) material clamps processing:
Solder made from step (3) is placed in step (2), and treated between molybdenum-copper and stainless steel welding surface, then
It is assembled with fixture, the pressure for during which controlling sealing-in is 1.4MPa, and it is spare to obtain part to be welded after the completion；
(5) soldering:
By step (4), treated that part to be welded is put into vacuum brazing equipment carries out soldering, and it is cold to take out nature after the completion
But to after room temperature.
Further, degreasing fluid as described in step (1) is the acetone soln that mass fraction is 15%；At the drying
It is 75 DEG C that the temperature in drying box is controlled when reason.
Further, irradiation power when radiation treatment described in step (2) in control ultraviolet irradiation case is
1400W, the wavelength of ultraviolet light are 300 ~ 320nm.
Further, the mass fraction of sulfuric acid solution described in step (3) operation a is 10%；The sodium hydroxide is molten
The mass fraction of liquid is 14%.
Further, the mass fraction of silane coupler solution described in step (3) operation c is 30%；The silane
Coupling agent is silane coupling agent kh570.
Further, nitric acid rare earth salt described in step (3) operation e is yttrium nitrate.
Further, atomization gas used when vacuum gas-atomized powder described in step (3) operation f is nitrogen.
Further, pressure sintering processing time control pressing pressure described in step (3) operation g is the temperature of 66MPa, sintering
It is 680 DEG C；The heat treatment is to carry out homogenization heat treatment to material, and the temperature for controlling processing is 580 DEG C, Shi Changwei 12h；
The described calendering processing and intermediate annealing process be the material after heat treatment is repeatedly rolled, and between rolling twice into
Row intermediate annealing process, controlled at 560 DEG C, Shi Changwei 3h when the annealing.
Further, when soldering described in step (5) control vacuum brazing equipment in vacuum degree be 1 ~ 3 ×
10-4Pa, brazing temperature are 920 DEG C, when heat preservation a length of 16min.
Comparative example 1
This comparative example 1 compared with Example 2, step (3) solder preparation in, eliminate operation d made from reactant A at
The manufacture and use divided, method and step in addition to this are all the same.
Comparative example 2
This comparative example 2 compared with Example 2, in the preparation of step (3) solder, eliminates nitric acid rare earth salt, ethylenediamine tetraacetic
The use of acetic acid disodium ingredient, method and step in addition to this are all the same.
Control group
Application No. is: a kind of vacuum active brazing process of molybdenum-copper and stainless steel disclosed in CN201110429990.7.
In order to compare effect of the present invention, to select molybdenum mass fraction be 60%, the molybdenum-copper that Copper mass fraction is 40%, and
As experimental subjects, the size for controlling above-mentioned material long generous is 1Cr18Ni9Ti stainless steel: 30mm × 10mm × 3mm, so
Soldering is carried out with above-described embodiment 2, comparative example 1, comparative example 2, the corresponding method of control group respectively afterwards, finally
To each group, treated that weldment is tested for the property, and specific correlation data is as shown in table 1 below:
Table 1
Note: welding performance test described in upper table 1 is carried out referring to industry standard.
Soldering method of the present invention can be obviously improved between molybdenum-copper and stainless steel it can be seen from upper table 1
Weld strength quality, it will be apparent that improve stability and the service life of welding, the great market competitiveness and application value.
Claims (9)
1. a kind of high-intensitive method for welding for molybdenum-copper and stainless steel, which comprises the steps of:
(1) surface cleaning processing:
Molybdenum-copper, stainless steel are respectively put into degreasing fluid and carry out immersion oil removal treatment, takes out after 10 ~ 15min, then puts
Enter and be dried into drying box, is taken out after 20 ~ 25min, it is spare after finally being polished with sand paper；
(2) surface modification treatment:
Step (1) treated molybdenum-copper, stainless steel are put into ultraviolet irradiation case and carry out radiation treatment, 30 ~ 40min
After take out it is spare；
(3) prepared by solder:
A. attapulgite is submerged initially in 4 ~ 6min of immersion treatment in sulfuric acid solution, is immersed in sodium hydroxide solution again after taking-up
5 ~ 8min of immersion treatment, finally taking-up are spare after being rinsed one time with deionized water；
B. will operation a treated that attapulgite is put into calcining furnace carries out calcination processing, the temperature for controlling calcining is 700 ~
750 DEG C, heat preservation calcining 1 ~ 2h after take out it is spare；
C. will operation b treated that attapulgite is immersed in 20 ~ 25min of immersion treatment in silane coupler solution, done after taking-up
It is dry spare；
D. will operation c treated attapulgite, aluminum phosphate, polyethylene glycol, uramit, zinc stearate it is corresponding according to weight ratio
6 ~ 8:18 ~ 22:5 ~ 7:2 ~ 5:0.2 ~ 0.4 is mixed, and is then put into and is carried out intermittent warming in alternating temperature case, first will be in alternating temperature case
It is heated to 110 ~ 120 DEG C, after 3 ~ 5min of isothermal holding, then alternating temperature case is warming up to 180 ~ 200 DEG C, 15 ~ 20min of isothermal holding
Afterwards, then by alternating temperature case 690 ~ 720 DEG C, 20 ~ 25min of isothermal holding are warming up to, must be reacted after finally taking out cooled to room temperature
Object A is spare；
E. it is spare to weigh following substance by corresponding parts by weight: 80 ~ 85 parts of silver, 13 ~ 17 parts of copper, 1 ~ 3 part of titanium, 2 ~ 4 parts of operation d are made
Reactant A, 0.1 ~ 0.2 portion of nitric acid rare earth salt, 0.3 ~ 0.6 part of disodium ethylene diamine tetraacetate；
F. the weighed silver of e, copper, titanium will be operated to mix and put into vacuum melting furnace jointly, heating is kept in vacuum melting furnace
Temperature is 1150 ~ 1180 DEG C, and vacuum gas-atomized powder is carried out after 35 ~ 40min of isothermal holding, take out after the completion mixture B is standby
With；
G. reactant A, nitric acid rare earth salt, ethylenediamine tetraacetic made from the weighed operation d of mixture B biconditional operation e made from f will be operated
Acetic acid disodium is put into jointly and carries out ball mill grinding processing in ball mill, takes out after 30 ~ 35min, finally again through pressure sintering, heat
It is spare that solder is made in processing, calendering processing and intermediate annealing step；
(4) material clamps processing:
Solder made from step (3) is placed in step (2), and treated between molybdenum-copper and stainless steel welding surface, then
It is assembled with fixture, the pressure for during which controlling sealing-in is 1 ~ 1.4MPa, and it is spare to obtain part to be welded after the completion；
(5) soldering:
By step (4), treated that part to be welded is put into vacuum brazing equipment carries out soldering, and it is cold to take out nature after the completion
But to after room temperature.
2. a kind of high-intensitive method for welding for molybdenum-copper and stainless steel according to claim 1, which is characterized in that
Degreasing fluid as described in step (1) is the acetone soln that mass fraction is 10 ~ 15%；Drying box is controlled when the described drying process
Interior temperature is 70 ~ 75 DEG C.
3. a kind of high-intensitive method for welding for molybdenum-copper and stainless steel according to claim 1, which is characterized in that
It is 1200 ~ 1400W, the wave of ultraviolet light that the irradiation power in ultraviolet irradiation case is controlled when radiation treatment described in step (2)
A length of 300 ~ 320nm.
4. a kind of high-intensitive method for welding for molybdenum-copper and stainless steel according to claim 1, which is characterized in that
The mass fraction that step (3) operates sulfuric acid solution described in a is 7 ~ 10%；The mass fraction of the sodium hydroxide solution is
12~14%。
5. a kind of high-intensitive method for welding for molybdenum-copper and stainless steel according to claim 1, which is characterized in that
The mass fraction that step (3) operates silane coupler solution described in c is 25 ~ 30%；The silane coupling agent is that silane is even
Join agent kh550, silane coupling agent kh560, any one in silane coupling agent kh570.
6. a kind of high-intensitive method for welding for molybdenum-copper and stainless steel according to claim 1, which is characterized in that
Step (3) operates nitric acid rare earth salt described in e as any one in lanthanum nitrate, cerous nitrate, yttrium nitrate.
7. a kind of high-intensitive method for welding for molybdenum-copper and stainless steel according to claim 1, which is characterized in that
It is nitrogen that step (3), which operates atomization gas used when vacuum gas-atomized powder described in f,.
8. a kind of high-intensitive method for welding for molybdenum-copper and stainless steel according to claim 1, which is characterized in that
Pressure sintering processing time control pressing pressure is 62 ~ 66MPa described in step (3) operation g, the temperature of sintering is 650 ~ 680 DEG C；Institute
The heat treatment stated is to carry out homogenization heat treatment to material, and the temperature for controlling processing is 550 ~ 580 DEG C, 10 ~ 12h of Shi Changwei；Institute
The calendering processing stated and intermediate annealing process are repeatedly to be rolled to the material after heat treatment, and carry out between rolling twice
Intermediate annealing process, controlled at 530 ~ 560 DEG C, 1 ~ 3h of Shi Changwei when the annealing.
9. a kind of high-intensitive method for welding for molybdenum-copper and stainless steel according to claim 1, which is characterized in that
It is 1 ~ 3 × 10 that the vacuum degree in vacuum brazing equipment is controlled when soldering described in step (5)-4Pa, brazing temperature 880
~ 920 DEG C, when heat preservation a length of 12 ~ 16min.
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