CN101337305A - Welding method of silver base material and pure aluminium material - Google Patents

Welding method of silver base material and pure aluminium material Download PDF

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Publication number
CN101337305A
CN101337305A CNA2008101506049A CN200810150604A CN101337305A CN 101337305 A CN101337305 A CN 101337305A CN A2008101506049 A CNA2008101506049 A CN A2008101506049A CN 200810150604 A CN200810150604 A CN 200810150604A CN 101337305 A CN101337305 A CN 101337305A
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pure
sill
welding method
based material
welding
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张赋升
李京龙
熊江涛
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Northwestern Polytechnical University
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Northwestern Polytechnical University
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Abstract

The invention discloses a method for welding a Ag-based material and a pure Al material, which comprises the following steps: firstly, a locating groove which has the same size as the section of the Ag-based material to be welded is processed on the welding surface of the Al material to be welded; after the processed Ag-based material is placed in the locating groove on the processed pure Al material, the whole is placed between the upper and the lower press heads of a vacuum diffusion welding furnace; a resistance welding layer is arranged between the upper press head and the Ag-based material, and between the lower press head and the pure Al material, and a pre-pressure is applied; then a solid phase diffusion welding method or a transient liquid phase diffusion welding method is adopted to weld the Ag-based material and the pure Al material; because the solid phase diffusion welding method or the transient liquid phase diffusion welding method is adopted to weld the Ag-based material and the pure Al material, the tensile strength of a joint, compared with the prior explosive welding method, increases from the prior 70-85MPa to 81-104MPa; and the utilization ratio for the Ag-based material increases from the prior 50% to 90-100%.

Description

The welding method of silver-based material and pure aluminum material
Technical field
The present invention relates to a kind of welding method of silver-based material.
Background technology
Document 1 " the electroerosion characteristics of AgNi series contact under the direct current even load, Li Heng, Hou Yuebin, " electrical material ", 3,2005, p.12～14,25 " discloses the electroerosion characteristics of AgNi series contact under the direct current even load.
Document 2 " the synthetic AgSnO of reaction 2The research of the electrical contact performance of contact material, Liu Fangfang, Chen Jingchao, Guo Yingchun, Geng Yonghong, Guan Weiming, " rare metal ", 31,2007, p.486～490 " a kind of AgSnO is disclosed 2The electrical contact performance of contact material, above-mentioned document shows, the Ag sill has favorable conductive, thermal conductivity, contact resistance is low and stable, and electric arc is good at its apparent motion, the arc root can move rapidly and can not stagnate calcination, and galvano-cautery is little and even, and the machining property of material own is good simultaneously.Exactly because the Ag sill has above-mentioned advantage, and is selected as the high power switch contact material.But the Ag sill costs an arm and a leg, if whole contact all adopts this material, then the contact cost is high, is difficult to carry out engineering and uses.Therefore, the method that extensively adopts on the engineering is at present: only in the working region, be that contact contact interface and near zone adopt the Ag sill, the matrix region, promptly the remainder except that contact adopts electric conductivity to be only second to silver and the lower copper of price substitutes, then by the method for welding will work, the connections of matrix two zone, finally constitute the composite construction contact.
Because the large usage quantity of contact matrix material, in order further to reduce cost, in order to reduce the weight of contact, improve the response speed of contact opening and closing action simultaneously, adopt the equal-volume price to be about 1/10 of Cu, density less than 1/3 the pure Al of Cu as matrix material.
During Ag sill-Al composite construction contact is made, known method is to adopt the explosive welding (EW) method, although the bonding strength of explosive welding (EW) is higher, joint tensile strength 70～85MPa, but have following significant disadvantages: the distortion of postwelding part is excessive, need the postwelding machine to add and make weldment reach corresponding dimensional requirement, so, waste of material is bigger, and particularly this precious materials utilization rate of Ag sill has only about 50%; Simultaneously, need to prepare and special welding place before the complicated weldering, so production efficiency is lower because explosive welding (EW) is a kind of Special Working Technology of relative risk, be generally every month everyone to weld area be 1m 2
Summary of the invention
In order to overcome the low deficiency of prior art joint tensile strength utilization rate low and the Ag sill, the invention provides the welding method of a kind of silver-based material and pure aluminum material, adopt the method for solid-state diffusion weldering or instant liquid-phase diffusion welding, can improve joint tensile strength, improve the utilization rate of Ag sill simultaneously, reduce welding cost.
The technical solution adopted for the present invention to solve the technical problems: the welding method of a kind of silver-based material and pure aluminum material is characterized in comprising the steps:
(a) on the solder side of pure Al material to be welded, process one with big locating slots such as Ag sill sectional dimension to be welded;
(b) treated Ag sill is put into locating slot on the treated pure Al material after, integral body places between the interior upper and lower pressure head of Vacuum diffusion bonding furnace, between seaming chuck and Ag sill, push-down head and pure Al material, place solder mask, apply precompression 0.8～1.2MPa;
(c) to the vacuum diffusion welding stove evacuation, when vacuum reaches 3.0 * 10 -3～4.0 * 10 -3During Pa, begin heating;
(d) adopt the solid-state diffusion weldering, temperature is risen to 520～550 ℃ by room temperature, pressurization 3～4MPa, insulation 60～120min, insulation finishes the back with the stove cooling, and it is constant to keep-up pressure;
(e) or adopt instant liquid-phase diffusion welding, temperature is risen to 500～520 ℃ by room temperature, pressurization 4～6MPa, insulation 60～80min, insulation is laid down pressure after finishing, continue to be warming up to 575～590 ℃ of insulations, temperature retention time is 20～40min, and insulation finishes the back and cools off with stove.
The invention has the beneficial effects as follows: owing to adopt the method for solid-state diffusion weldering or instant liquid-phase diffusion welding that silver-based material and fine aluminium are welded, compare with the prior art explosion welding method, make joint tensile strength bring up to 81～104MPa by 70～85MPa of prior art; The utilization rate of Ag sill brings up to 90～100% by 50% of prior art, because Ag sill cost accounts for about 85% of whole contact material cost, therefore, the raising of Ag sill utilization rate has reduced about 40% the contact material cost; In addition, the present invention compares with the prior art explosion welding method, need not to prepare and special welding place before the complicated weldering, so production efficiency is higher, be generally every month everyone to weld area be 6～8m 2, be 6～8 times of explosion welding method.
Below in conjunction with drawings and Examples the present invention is elaborated.
Description of drawings
Accompanying drawing is that the welding method of silver-based material of the present invention and fine aluminium is with the structure that is installed.
Among the figure, 1-seaming chuck, 2-Ag sill, the pure Al material of 3-, 4-solder mask material, 5-push-down head, 6-locating slot.
The specific embodiment
Following examples are with reference to accompanying drawing.
The solid-state diffusion welding of embodiment 1:Ag sill Ag10Ni and pure aluminum material.
On the face of weld of pure Al material 3 to be welded, process and big locating slots 6 such as Ag sill 2-Ag10Ni sectional dimension to be welded, be used for the be installed location of Ag sill 2-Ag10Ni on pure Al material 3, locating slot 6 degree of depth are 1/3 of Ag sill 2-Ag10Ni thickness.
Clear up pure Al material 3 welding surfaces, the i.e. bottom of locating slot 6 and sidewall with steel brush; With to be welded of 2000#SiC sand papering Ag sill 2-Ag10Ni.To clear up pure Al material 3 and put into ethanol ultrasonic wave cleaning 5min through sand papering Ag sill 2-Ag10Ni through steel brush, cold wind dries up.Ag sill 2-Ag10Ni packed into be positioned at locating slot 6 on the pure Al material 3, put between the seaming chuck 1, push-down head 5 of Vacuum diffusion bonding furnace, and between seaming chuck 1 and Ag sill 2-Ag10Ni, and insert solder mask material 4-pottery between push-down head 5 and the pure Al material 3.After 4 pairs of welded parts of solder mask material apply the 1MPa precompression, close the vacuum fire door, vacuumize.When vacuum reaches 3.0 * 10 -3During Pa, begin heating; When temperature reaches 520 ℃, apply the pressure of 4MPa, insulation 120min; After insulation finished, with the stove cooling, and pressure remained unchanged in the cooling procedure.
After tested, joint tensile strength 81MPa, the joint total deformation is 4.65%, and only needs pure aluminum material is carried out a little machining, just can satisfy the dimensional requirement of contact part.The production efficiency of the method every month everyone to weld area be 6m 2
The instant liquid-phase diffusion welding of embodiment 2:Ag sill Ag10Ni and pure aluminum material connects.
On the face of weld of pure Al material 3 to be welded, process and big locating slots 6 such as Ag sill 2-Ag10Ni sectional dimension to be welded, be used for the be installed location of Ag sill 2-Ag10Ni on pure Al material 3, locating slot 6 degree of depth are 1/3 of Ag sill 2-Ag10Ni thickness.
Clear up pure Al material 3 welding surfaces, the i.e. bottom of locating slot 6 and sidewall with steel brush; With to be welded of 2000#SiC sand papering Ag sill 2-Ag10Ni.To clear up pure Al material 3 and put into ethanol ultrasonic wave cleaning 5min through sand papering Ag sill 2-Ag10Ni through steel brush, cold wind dries up.Ag sill 2-Ag10Ni packed into be positioned at locating slot 6 on the pure Al material 3, put between the seaming chuck 1, push-down head 5 of Vacuum diffusion bonding furnace, and between seaming chuck 1 and Ag sill 2-Ag10Ni, and insert solder mask material 4-mica between push-down head 5 and the pure Al material 3.After 4 pairs of welded parts of solder mask material apply the 1MPa precompression, close the vacuum fire door, vacuumize.When vacuum reaches 3.5 * 10 -3During Pa, begin heating; When temperature reaches 530 ℃, apply the pressure of 4MPa, insulation 80min; Insulation is laid down pressure after finishing, and continues to be warming up to 575 ℃, and temperature retention time is 40min, and insulation finishes the back and cools off with stove.
After tested, joint tensile strength 104MPa, joint distortion amount 4.93%, and only need pure aluminum material is carried out a little machining, just can satisfy the dimensional requirement of contact part.The production efficiency of the method every month everyone to weld area be 6m 2
Embodiment 3:Ag sill AgSnO 2Solid-state diffusion welding with pure aluminum material.
On the face of weld of pure Al material 3 to be welded, process and Ag sill 2-AgSnO to be welded 2The locating slot 6 that sectional dimension etc. are big is used for Ag sill 2-AgSnO 2The location that is installed on pure Al material 3, locating slot 6 degree of depth are Ag sill 2-AgSnO 22/5 of thickness.
Clear up pure Al material 3 welding surfaces, the i.e. bottom of locating slot 6 and sidewall with steel brush; With 2000#SiC sand papering Ag sill 2-AgSnO 2To be welded.To clear up pure Al material 3 and process sand papering Ag sill 2-AgSnO through steel brush 2Put into the ethanol ultrasonic wave and clean 5min, cold wind dries up.With Ag sill 2-AgSnO 2Packing into is positioned at locating slot 6 on the pure Al material 3, put between the seaming chuck 1, push-down head 5 of Vacuum diffusion bonding furnace, and at seaming chuck 1 and Ag sill 2-AgSnO 2Between, and insert solder mask material 4-mica between push-down head 5 and the pure Al material 3.After 4 pairs of welded parts of solder mask material apply the 1MPa precompression, close the vacuum fire door, vacuumize.When vacuum reaches 3.5 * 10 -3During Pa, begin heating; When temperature reaches 540 ℃, apply the pressure of 3MPa, insulation 80min; After insulation finished, with the stove cooling, and pressure remained unchanged in the cooling procedure.
After tested, joint tensile strength 89MPa, joint distortion amount 5.86%.And only need pure aluminum material is carried out a little machining, just can satisfy the dimensional requirement of contact part.The production efficiency of the method every month everyone to weld area be 8m 2
Embodiment 4:Ag sill AgSnO 2Connect with the instant liquid-phase diffusion welding of pure aluminum material.
On the face of weld of pure Al material 3 to be welded, process and Ag sill 2-AgSnO to be welded 2The locating slot 6 that sectional dimension etc. are big is used for Ag sill 2-AgSnO 2The location that is installed on pure Al material 3, locating slot 6 degree of depth are Ag sill 2-AgSnO 22/5 of thickness.
Clear up pure Al material 3 welding surfaces, the i.e. bottom of locating slot 6 and sidewall with steel brush; With 2000#SiC sand papering Ag sill 2-AgSnO 2To be welded.To clear up pure Al material 3 and process sand papering Ag sill 2-AgSnO through steel brush 2Put into the ethanol ultrasonic wave and clean 5min, cold wind dries up.With Ag sill 2-AgSnO 2Packing into is positioned at locating slot 6 on the pure Al material 3, put between the seaming chuck 1, push-down head 5 of Vacuum diffusion bonding furnace, and at seaming chuck 1 and Ag sill 2-AgSnO 2Between, and insert solder mask material 4-pottery between push-down head 5 and the pure Al material 3.After 4 pairs of welded parts of solder mask material apply the 1MPa precompression, close the vacuum fire door, vacuumize.When vacuum reaches 4.0 * 10 -3During Pa, begin heating; When temperature reaches 500 ℃, apply the pressure of 6MPa, insulation 60min; Insulation is laid down pressure after finishing, and continues to be warming up to 590 ℃, and temperature retention time is 20min, and insulation finishes the back and cools off with stove.
After tested, joint tensile strength 94MPa, joint distortion amount 4.63%.And only need pure aluminum material is carried out a little machining, just can satisfy the dimensional requirement of contact part.The production efficiency of the method every month everyone to weld area be 8m 2

Claims (3)

1, the welding method of a kind of silver-based material and pure aluminum material is characterized in that comprising the steps:
(a) on the solder side of pure Al material to be welded, process one with big locating slots such as Ag sill sectional dimension to be welded;
(b) treated Ag sill is put into locating slot on the treated pure Al material after, integral body places between the interior upper and lower pressure head of Vacuum diffusion bonding furnace, between seaming chuck and Ag sill, push-down head and pure Al material, place solder mask, apply precompression 0.8～1.2MPa;
(c) to the vacuum diffusion welding stove evacuation, when vacuum reaches 3.0 * 10 -3～4.0 * 10 -3During Pa, begin heating;
(d) adopt the solid-state diffusion weldering, temperature is risen to 520～550 ℃ by room temperature, pressurization 3～4MPa, insulation 60～120min, insulation finishes the back with the stove cooling, and it is constant to keep-up pressure;
(e) or adopt instant liquid-phase diffusion welding, temperature is risen to 500～520 ℃ by room temperature, pressurization 4～6MPa, insulation 60～80min, insulation is laid down pressure after finishing, continue to be warming up to 575～590 ℃ of insulations, temperature retention time is 20～40min, and insulation finishes the back and cools off with stove.
2, the welding method of silver-based material according to claim 1 and pure aluminum material is characterized in that: described locating slot, its degree of depth are 1/3～2/5 of Ag sill thickness.
3, the welding method of silver-based material according to claim 1 and pure aluminum material is characterized in that: described solder mask, its material are pottery or mica.
CNA2008101506049A 2008-08-13 2008-08-13 Welding method of silver base material and pure aluminium material Pending CN101337305A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102328153A (en) * 2011-09-01 2012-01-25 河南科技大学 Crimping diffusion welding process and clamp of aluminum or aluminum alloy and heterogeneous metal
CN104084691A (en) * 2014-07-10 2014-10-08 西北工业大学 Aluminum alloy constant-strength diffusion connecting method
CN105108257A (en) * 2015-08-21 2015-12-02 南昌航空大学 Transition-liquid-phase-assisted solid-phase connection method
CN105252137A (en) * 2015-11-13 2016-01-20 哈尔滨工业大学 Aluminum or aluminium alloy and copper vacuum diffusion welding method
CN105934308A (en) * 2014-02-10 2016-09-07 三菱电机株式会社 Bonding material, bonding method and semiconductor device for electric power
CN108213695A (en) * 2018-01-29 2018-06-29 哈尔滨工业大学（威海） A kind of diffusion welding (DW) auxiliary device of plate heat exchanger
CN110064808A (en) * 2019-04-20 2019-07-30 无锡天杨电子有限公司 A kind of method that hot pressing active soldering method prepares ceramic copper-clad plate
CN110756980A (en) * 2019-11-07 2020-02-07 西北工业大学 Sectional diffusion welding method, application thereof and aero-engine hollow blade

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102328153A (en) * 2011-09-01 2012-01-25 河南科技大学 Crimping diffusion welding process and clamp of aluminum or aluminum alloy and heterogeneous metal
CN102328153B (en) * 2011-09-01 2013-07-31 河南科技大学 Crimping diffusion welding process of aluminum or aluminum alloy and heterogeneous metal
CN105934308A (en) * 2014-02-10 2016-09-07 三菱电机株式会社 Bonding material, bonding method and semiconductor device for electric power
CN105934308B (en) * 2014-02-10 2018-12-21 三菱电机株式会社 Grafting material, joint method and power semiconductor device
CN104084691A (en) * 2014-07-10 2014-10-08 西北工业大学 Aluminum alloy constant-strength diffusion connecting method
CN105108257A (en) * 2015-08-21 2015-12-02 南昌航空大学 Transition-liquid-phase-assisted solid-phase connection method
CN105252137A (en) * 2015-11-13 2016-01-20 哈尔滨工业大学 Aluminum or aluminium alloy and copper vacuum diffusion welding method
CN108213695A (en) * 2018-01-29 2018-06-29 哈尔滨工业大学（威海） A kind of diffusion welding (DW) auxiliary device of plate heat exchanger
CN110064808A (en) * 2019-04-20 2019-07-30 无锡天杨电子有限公司 A kind of method that hot pressing active soldering method prepares ceramic copper-clad plate
CN110756980A (en) * 2019-11-07 2020-02-07 西北工业大学 Sectional diffusion welding method, application thereof and aero-engine hollow blade

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Open date: 20090107