CN103143805A - Method for relieving residual stress of brazed joint - Google Patents
Method for relieving residual stress of brazed joint Download PDFInfo
- Publication number
- CN103143805A CN103143805A CN2013100960285A CN201310096028A CN103143805A CN 103143805 A CN103143805 A CN 103143805A CN 2013100960285 A CN2013100960285 A CN 2013100960285A CN 201310096028 A CN201310096028 A CN 201310096028A CN 103143805 A CN103143805 A CN 103143805A
- Authority
- CN
- China
- Prior art keywords
- residual stress
- soldered fitting
- alleviating
- block body
- welded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Ceramic Products (AREA)
Abstract
The invention relates to a method for relieving residual stress of a brazed joint. The method for relieving residual stress of the brazed joint solves the problems that the existing method for adjusting the residual stress of the brazed joint is complicated and can bring bad influence on the performance of a welded joint. Particularly, the method comprises the following steps of: firstly, preparing a porous metal interlayer body; secondly, preparing bulk porous metal material sheets with different porosities; thirdly, assembling components; and fourthly, placing the components after being assembled in a vacuum brazing furnace for brazing so as to relieve the residual stress of the brazed joint. The method is applied to the brazing field.
Description
Technical field
The present invention relates to a kind of method of alleviating the soldered fitting residual stress.
Background technology
In brazing process, due between welded mother metal and the thermal coefficient of expansion between welded mother metal and weld metal, elastic modulus difference cause forming in welding point welding residual stress, particularly when foreign material welds, because the difference in material properties such as thermal coefficient of expansion and elastic modelling quantity are larger, the welding residual stress problem of formation is more outstanding.Welding residual stress has reduced mechanical property and the serviceability of welding point, can cause welding point directly to ftracture when serious, and welding point was lost efficacy.Therefore, how to alleviate residual stress in soldered fitting and become key factor in welding procedure.
At present, the control method about the soldered fitting residual stress mainly contains intermediate layer method and composite soldering method.The intermediate layer method is to introduce the metal intermediate layer paillon foil in brazed seam, can be divided into the methods such as intermediate layer, soft metal, low bulk metal intermediate layer and composite interlayer according to the character of introducing tinsel.The intermediate layer, soft metal is to utilize the plastic deformation of soft metal and the residual stress that joint is alleviated in the deformation of creep, as Cu, Al, Ni etc.Therefore have good toughness, yielding characteristics as pure Cu, can reduce the residual stress that dissimilar metal, ceramic/metal joint produce when doing the intermediate layer with the soft metal in cooling procedure.The fusing point of pure Al with face-centered cubic lattice crystal structure is low, intensity is low and yielding, not only is conducive to reduce the stress that different metal materials, ceramic/metal joint cooling procedure produce when doing the intermediate layer and also can reduces the temperature of connection.In the ceramic-metal brazing joint, often select the hard metal intermediate layer that thermal coefficient of expansion is low, elastic modelling quantity is high to regulate residual stress.Low bulk intermediate layer such as W, Mo, Ta etc. utilize the coefficient of expansion of these materials and the characteristics that ceramic material comparatively approaches, and alleviate the residual stress of joint.If introduce simultaneously intermediate layer, soft metal and low bulk intermediate layer form composite interlayer in brazed seam, composite interlayer is realized thermal coefficient of expansion in soldered fitting from a side to the opposite side gradient transition, thereby alleviates the residual stress of joint.Composite interlayer generally alternately is comprised of soft, hard metal level, and as W/Cu, Cu/Ti/Cu and Ni/W/Ni etc., its form is that multiple layer metal is superimposed, or prepares by methods such as plating, CVD or PVD.In said method, composite interlayer has certain effect, can to a certain degree improve the mechanical property of soldered fitting, but this method relates to multiple intermediate layer, and method is complicated and be difficult for realizing, and is only applicable to the welding point of the simple shape such as plane overlap joint.
The research in ceramic material and ceramic-metal connection of composite soldering method is more.The composite soldering method be by directly add in metal solder or generate by reaction in-situ at brazing process have low thermal coefficient of expansion, the wild phase of high elastic modulus, to realize the Composite design to soldered fitting.The method reduces the thermal coefficient of expansion of brazed seam by to adding or generate the control of wild phase, improves its elastic modelling quantity, and the thermal coefficient of expansion of brazed seam and materials to be welded and elastic modelling quantity are approached as far as possible, thus the residual stress of slowing down joint.But the composite soldering method does not change the physical property mismatch problem between welded mother metal and weld metal.Wild phase elastic modelling quantity in the composite soldering method is large in addition, quality is more crisp, and being therefore that directly interpolation or original position are synthetic all can increase the fragility of welding point, thereby brings adverse effect to property of welded joint.
In sum, the method for a kind of simple, good economy performance of design is alleviated the soldered fitting residual stress, is improved welding joint mechanical property and become problem demanding prompt solution.
Summary of the invention
The present invention will solve the control method of existing soldered fitting residual stress complexity and can bring the problem of adverse effect to property of welded joint, and a kind of method of alleviating the soldered fitting residual stress is provided.
A kind of method of alleviating the soldered fitting residual stress of the present invention is to carry out in accordance with the following steps:
One, preparation intermediate porous metal layer base substrate: be that 100～325 purpose metal dusts are loaded in mould and cold pressing with granularity, obtain the intermediate porous metal layer base substrate; Wherein, pressure is 5～30MPa, and the retention time is 5～15min, and the number of times of colding pressing is 3～5 times;
Two, preparation has the block body stephanoporate metal material thin slice of different porosities: the intermediate porous metal layer base substrate that step 1 is obtained is placed in vacuum drying oven, and then the vacuum with vacuum drying oven is evacuated to 1 * 10
-3Heat-treat after Pa and be incubated, then being cooled to room temperature, obtaining having the block body stephanoporate metal material of different porosities, then utilizing wire cutting method to be cut into the block body stephanoporate metal material thin slice with different porosities that thickness is 0.1～0.5mm;
Three, remove oxide-film and the greasy dirt of material surface to be welded; The block body stephanoporate metal material thin slice with different porosities that step 2 is obtained carries out the organic solvent ultrasonic cleaning; Material to be welded, block body stephanoporate metal material thin slice and solder with different porosities are assembled the member after being assembled;
Four, the member after the assembling that obtains of step 3 is positioned in vacuum brazing furnace, applies the welding pressure of 3～5MPa, then vacuum in vacuum brazing furnace is evacuated to 1 * 10
-3Pa, then the speed take the rate of heat addition as 10～30 ℃/min be heated to welding temperature and the insulation, then be cooled to room temperature, namely complete soldering.
A kind of method of soldered fitting residual stress of alleviating of the present invention is by appropriate design intermediate porous metal layer porosity and thickness etc., height distortion capacity adjustment soldered fitting stress intensity and distribution by intermediate porous metal layer, reduce soldered fitting residual stress peak value, improve welding joint mechanical property.The intermediate porous metal layer deformability is strong, can by distortion release portion welding residual stress, improve the mechanical property of welding point.In addition, the inventive method need not that special installation, method are simple, easy realization.
When adopting porous Ni intermediate layer and Ag-Cu-Ti solder by method of the present invention, the room temperature shear strength of GH99 nickel base superalloy soldered fitting is brought up to 237MPa from 220MPa, has improved 8% when not introducing porous Ni metal intermediate layer; When adopting this method, the room temperature shear strength of TC4 titanium alloy and Nb different metal materials soldered fitting is brought up to 208MPa from 185MPa, has improved 12% when not introducing porous Ni metal intermediate layer; When adopting this method, the room temperature shear strength of TC4 titanium alloy and GH99 different metal materials soldered fitting is brought up to 215MPa from 177MPa, has improved 21% when not introducing porous Ni metal intermediate layer; The room temperature shear strength of ZrC-20.Vol%SiC composite ceramic material and Nb foreign material soldered fitting is brought up to 125MPa from 97MPa, and its intensity has improved 29%.The soldering that the present invention is not only applicable to same material connects, and more is conducive to improve the mechanical property of different metal materials, xenogenesis ceramic material and ceramic-metal soldered fitting.
Description of drawings
Fig. 1 is for the Ag-Cu-Ti solder is adopted in test 1,200 times of SEM figure of soldered fitting when porous Ni intermediate layer soldering connects nickel base superalloy GH99;
Fig. 2 is for the Ag-Cu-Ti solder is adopted in test 2,250 times of SEM figure of soldered fitting when porous Ni intermediate layer soldering connects Nb and TC4 different metal materials;
Fig. 3 is for the Ag-Cu-Ti solder is adopted in test 3,200 times of SEM figure of soldered fitting when porous Ni intermediate layer soldering connects GH99 nickel base superalloy and TC4 different metal materials;
Fig. 4 is for the Ag-Cu-Ti solder is adopted in test 4,200 times of SEM figure of soldered fitting when porous Ni intermediate layer soldering connects ZrC-20Vol.%SiC composite ceramics and metal Nb.
The specific embodiment
The specific embodiment one: a kind of method of alleviating the soldered fitting residual stress of present embodiment is to carry out in accordance with the following steps:
One, preparation intermediate porous metal layer base substrate: be that 100～325 purpose metal dusts are loaded in mould and cold pressing with granularity, obtain the intermediate porous metal layer base substrate; Wherein, pressure is 5～30MPa, and the retention time is 5～15min, and the number of times of colding pressing is 3～5 times;
Two, preparation has the block body stephanoporate metal material thin slice of different porosities: the intermediate porous metal layer base substrate that step 1 is obtained is placed in vacuum drying oven, and then the vacuum with vacuum drying oven is evacuated to 1 * 10
-3Heat-treat after Pa and be incubated, then being cooled to room temperature, obtaining having the block body stephanoporate metal material of different porosities, then utilizing wire cutting method to be cut into the block body stephanoporate metal material thin slice with different porosities that thickness is 0.1～0.5mm;
Three, remove oxide-film and the greasy dirt of material surface to be welded; The block body stephanoporate metal material thin slice with different porosities that step 2 is obtained carries out the organic solvent ultrasonic cleaning; Material to be welded, block body stephanoporate metal material thin slice and solder with different porosities are assembled the member after being assembled;
Four, the member after the assembling that obtains of step 3 is positioned in vacuum brazing furnace, applies the welding pressure of 3～5MPa, then vacuum in vacuum brazing furnace is evacuated to 1 * 10
-3Pa, then the speed take the rate of heat addition as 10～30 ℃/min be heated to welding temperature and the insulation, then be cooled to room temperature, namely complete soldering.
A kind of method of soldered fitting residual stress of alleviating of present embodiment is by appropriate design intermediate porous metal layer porosity and thickness etc., height distortion capacity adjustment soldered fitting stress intensity and distribution by intermediate porous metal layer, reduce soldered fitting residual stress peak value, improve welding joint mechanical property.The intermediate porous metal layer deformability is strong, can by distortion release portion welding residual stress, improve the mechanical property of welding point.In addition, the method for present embodiment need not that special installation, method are simple, easy realization.
When the method by present embodiment adopted porous Ni intermediate layer and Ag-Cu-Ti solder, the room temperature shear strength of GH99 nickel base superalloy soldered fitting was brought up to 237MPa from 220MPa, had improved 8% when not introducing porous Ni metal intermediate layer; When adopting this method, the room temperature shear strength of TC4 titanium alloy and Nb different metal materials soldered fitting is brought up to 208MPa from 185MPa, has improved 12% when not introducing porous Ni metal intermediate layer; When adopting this method, the room temperature shear strength of TC4 titanium alloy and GH99 different metal materials soldered fitting is brought up to 215MPa from 177MPa, has improved 21% when not introducing porous Ni metal intermediate layer; The room temperature shear strength of ZrC-20.Vol%SiC composite ceramic material and Nb foreign material soldered fitting is brought up to 125MPa from 97MPa, and its intensity has improved 29%.The soldering that present embodiment is not only applicable to same material connects, and more is conducive to improve the mechanical property of different metal materials, xenogenesis ceramic material and ceramic-metal soldered fitting.
The specific embodiment two: present embodiment is different from the specific embodiment one is that metal dust in step 1 is Cu, Ni or Nb.Other steps and parameter are identical with the specific embodiment one.
The specific embodiment three: what present embodiment was different from the specific embodiment one or two is that in step 2, heat treatment temperature is 0.5Tm～0.8Tm, and Tm is the fusing point of metal material.Other steps and parameter are identical with the specific embodiment one or two.
The specific embodiment four: what present embodiment was different from one of specific embodiment one to three is that in step 2, temperature retention time is 30～90min.Other steps and parameter are identical with one of specific embodiment one to three.
The specific embodiment five: what present embodiment was different from one of specific embodiment one to four is that the oxide-film of removal material surface to be welded in step 3 and the method for greasy dirt are: to 1000#, then use acetone soln ultrasonic cleaning 15～30min with sand papering material surface to be welded.Other steps and parameter are identical with one of specific embodiment one to four.
The specific embodiment six: present embodiment is different from one of specific embodiment one to five is that the organic solvent of step 3 is ethanolic solution or acetone soln.Other steps and parameter are identical with one of specific embodiment one to five.
The specific embodiment seven: present embodiment is different from one of specific embodiment one to six, and to be step 3 assemble material to be welded, the block body stephanoporate metal material thin slice with different porosities and solder according to material to be welded, solder, order with block body stephanoporate metal material thin slice, solder and material to be welded of different porosities.Other steps and parameter are identical with one of specific embodiment one to six.
The specific embodiment eight: what present embodiment was different from one of specific embodiment one to seven is that in step 4, welding temperature is higher than 30～100 ℃ of solder fusing points.Other steps and parameter are identical with one of specific embodiment one to seven.
The specific embodiment nine: what present embodiment was different from one of specific embodiment one to eight is that in step 4, temperature retention time is 5～15min.Other steps and parameter are identical with one of specific embodiment one to eight.
The specific embodiment ten: what present embodiment was different from one of specific embodiment one to nine is that in step 4, cooldown rate is 5～30 ℃/min.Other steps and parameter are identical with one of specific embodiment one to nine.
By following verification experimental verification beneficial effect of the present invention:
Test 1, a kind of method of alleviating the soldered fitting residual stress of this test are to carry out in accordance with the following steps:
One, preparation intermediate porous metal layer base substrate: be that 325 purpose nickel by powder are loaded in mould and cold pressing with granularity, obtain nickel porous intermediate layer of material base substrate; Wherein, pressure is 15MPa, and the retention time is 10min, and the number of times of colding pressing is 4 times;
Two, preparation has the block body stephanoporate metal material thin slice of different porosities: the nickel porous intermediate layer of material base substrate that step 1 is obtained is placed in vacuum drying oven, and then the vacuum with vacuum drying oven is evacuated to 1 * 10
-3Heat-treat and be incubated 60min after Pa, heat treatment temperature is 1000 ℃, be cooled to again room temperature, obtain having the block body stephanoporate nickel material of different porosities, then utilize wire cutting method to be cut into the block body stephanoporate nickel material thin slice with different porosities that thickness is 0.1～0.2mm;
Three, material GH99 nickel-base high-temperature alloy material sand for surface paper to be welded is polished to the oxide-film of 1000# removal material surface, then use acetone soln ultrasonic cleaning 15～30min; The block body stephanoporate nickel material thin slice with different porosities that step 2 is obtained is with acetone soln ultrasonic cleaning 25min; GH99 nickel-base high-temperature alloy material, the block body stephanoporate nickel material thin slice with different porosities and Ag-Cu-4.5wt.%Ti are assembled the member after being assembled according to GH99 nickel-base high-temperature alloy material, Ag-Cu-4.5wt.%Ti, order with block body stephanoporate nickel material thin slice, Ag-Cu-4.5wt.%Ti and GH99 nickel-base high-temperature alloy material of different porosities;
Four, the member after the assembling that obtains of step 3 is positioned in vacuum brazing furnace, applies the welding pressure of 4MPa, then vacuum in vacuum brazing furnace is evacuated to 1 * 10
-3Pa, then the speed take the rate of heat addition as 10～30 ℃/min is heated to welding temperature and is incubated 20min, welding temperature is 900 ℃, then is cooled to room temperature, namely completes soldering.
When with 200 times of SEM, Ag-Cu-Ti solder, porous Ni intermediate layer soldering connection nickel base superalloy GH99 are adopted in this test, soldered fitting scans, result as shown in Figure 1, as shown in Figure 1, that soldered fitting is shaped is good, without gross imperfection, porous Ni is not filled by solder in the intermediate layer fully, and its deformability has played the effect of regulating thermal stress.
This test utilizes the deformability of porous metal material and skeleton supporting role to alleviate the soldered fitting residual stress by appropriate design intermediate porous metal layer and welding procedure, improves the mechanical property of plumb joint.Show through test, when this test utilized Ag-Cu-Ti solder, porous Ni intermediate layer soldering to connect the GH99 nickel-base high-temperature alloy material, its room temperature shear strength was brought up to 237MPa from 220MPa, had improved 8% when not introducing nickel porous.
Test 2, a kind of method of alleviating the soldered fitting residual stress of this test are to carry out in accordance with the following steps:
One, preparation intermediate porous metal layer base substrate: be that 325 purpose nickel by powder are loaded in mould and cold pressing with granularity, obtain nickel porous intermediate layer of material base substrate; Wherein, pressure is 5MPa, and the retention time is 15min, and the number of times of colding pressing is 4 times;
Two, preparation has the block body stephanoporate metal material thin slice of different porosities: the nickel porous intermediate layer of material base substrate that step 1 is obtained is placed in vacuum drying oven, and then the vacuum with vacuum drying oven is evacuated to 1 * 10
-3Heat-treat and be incubated 60min after Pa, heat treatment temperature is 90, be cooled to again room temperature, obtain having the block body stephanoporate nickel material of different porosities, then utilize wire cutting method to be cut into the block body stephanoporate nickel material thin slice with different porosities that thickness is 0.1～0.2mm;
Three, with material TC4 to be welded and Nb material surface with sand papering to the oxide-film that 1000# removes material surface, then use acetone soln ultrasonic cleaning 15～30min; The block body stephanoporate nickel material thin slice with different porosities that step 2 is obtained is with acetone soln ultrasonic cleaning 25min; TC material, Nb material, the block body stephanoporate nickel material thin slice with different porosities and Ag-Cu-4.5wt.%Ti are assembled the member after being assembled according to TC4 material to be welded, Ag-Cu-4.5wt.%Ti, order with block body stephanoporate nickel material thin slice, Ag-Cu-4.5wt.%Ti and Nb material to be welded of different porosities;
Four, the member after the assembling that obtains of step 3 is positioned in vacuum brazing furnace, applies the welding pressure of 3～5MPa, then vacuum in vacuum brazing furnace is evacuated to 1 * 10
-3Pa, then the speed take the rate of heat addition as 10～30 ℃/min is heated to welding temperature and is incubated 20min, welding temperature is 850～950 ℃, then is cooled to room temperature, namely completes soldering.
A kind of method of alleviating the soldered fitting residual stress of this test by appropriate design intermediate porous metal layer and welding procedure, utilizes the deformability of porous metal material and skeleton supporting role to alleviate the soldered fitting residual stress, improves the mechanical property of plumb joint.Show through test, when utilizing Ag-Cu-Ti solder, porous Ni intermediate layer soldering connection TC4 and Nb different metal materials in this test, its room temperature shear strength is brought up to 208MPa from 185MPa, has improved 12% when not introducing porous Ni.
When with 250 times of SEM, Ag-Cu-Ti solder, porous Ni intermediate layer soldering connection Nb and TC4 different metal materials are adopted in this test, soldered fitting carries out scanning result as shown in Figure 2, as shown in Figure 2: soldered fitting is perfect to fall into, porous Ni intermediate layer is not completely filled, keep good deformability, can play thermal stress regulating action preferably.
Test 3, a kind of method of alleviating the soldered fitting residual stress of this test are to carry out in accordance with the following steps:
One, preparation intermediate porous metal layer base substrate: be that 325 purpose nickel by powder are loaded in mould and cold pressing with granularity, obtain nickel porous intermediate layer of material base substrate; Wherein, pressure is 30MPa, and the retention time is 5min, and the number of times of colding pressing is 4 times;
Two, preparation has the block body stephanoporate metal material thin slice of different porosities: the nickel porous intermediate layer of material base substrate that step 1 is obtained is placed in vacuum drying oven, and then the vacuum with vacuum drying oven is evacuated to 1 * 10
-3Heat-treat and be incubated 90min after Pa, heat treatment temperature is 800 ℃, be cooled to again room temperature, obtain having the block body stephanoporate nickel material of different porosities, then utilize wire cutting method to be cut into the block body stephanoporate nickel material thin slice with different porosities that thickness is 0.1～0.2mm;
Three, with material TC4 to be welded and GH99 material surface with sand papering to the oxide-film that 1000# removes material surface, then use acetone soln ultrasonic cleaning 15～30min; The block body stephanoporate nickel material thin slice with different porosities that step 2 is obtained is with acetone soln ultrasonic cleaning 25min; TC4 material, GH99 material, the block body stephanoporate nickel material thin slice with different porosities and Ag-Cu-4.5wt.%Ti are assembled the member after being assembled according to TC4 material, Ag-Cu-4.5wt.%Ti, order with block body stephanoporate nickel material thin slice, Ag-Cu-4.5wt.%Ti and GH99 material of different porosities;
Four, the member after the assembling that obtains of step 3 is positioned in vacuum brazing furnace, applies the welding pressure of 3～5MPa, then vacuum in vacuum brazing furnace is evacuated to 1 * 10
-3Pa, then the speed take the rate of heat addition as 10～30 ℃/min is heated to welding temperature and is incubated 20min, welding temperature is 850～950 ℃, then is cooled to room temperature, namely completes soldering.
A kind of method of alleviating the soldered fitting residual stress of this test by appropriate design intermediate porous metal layer and welding procedure, utilizes the deformability of porous metal material and skeleton supporting role to alleviate the soldered fitting residual stress, improves the mechanical property of plumb joint.Show through test, when utilizing Ag-Cu-Ti solder, porous Ni intermediate layer soldering connection TC4 and GH99 nickel base superalloy different metal materials in this test, its room temperature shear strength is brought up to 215MPa from 177MPa, has improved 21% when not introducing porous Ni.
When with 200 times of SEM, Ag-Cu-Ti solder, porous Ni intermediate layer soldering connection GH99 nickel base superalloy and TC4 different metal materials are adopted in this test, soldered fitting scans, result as shown in Figure 3, as shown in Figure 3, GH99 nickel base superalloy and TC4 foreign material soldered fitting are shaped good, soldered fitting is complete, pore-free and defects i.e.cracks.Thereby the most of ability that keeps porosity characteristic to have good deformability and absorb thermal stress in porous Ni intermediate layer in brazed seam finally plays the effect of alleviating soldered fitting stress.
Test 4, a kind of method of alleviating the soldered fitting residual stress of this test are to carry out in accordance with the following steps:
One, preparation intermediate porous metal layer base substrate: be that 100 purpose nickel by powder are loaded in mould and cold pressing with granularity, obtain nickel porous intermediate layer of material base substrate; Wherein, pressure is 30MPa, and the retention time is 15min, and the number of times of colding pressing is 4 times;
Two, preparation has the block body stephanoporate metal material thin slice of different porosities: the nickel porous intermediate layer of material base substrate that step 1 is obtained is placed in vacuum drying oven, and then the vacuum with vacuum drying oven is evacuated to 1 * 10
-3Heat-treat and be incubated 30min after Pa, heat treatment temperature is 1100, be cooled to again room temperature, obtain having the block body stephanoporate nickel material of different porosities, then utilize wire cutting method to be cut into the block body stephanoporate nickel material thin slice with different porosities that thickness is 0.1～0.2mm;
Three, the surperficial polishing with the diamond emery disc of material ZrC-20Vol.%SiC composite ceramics to be welded polished to the oxide-film of 1000# removal material surface to 1200#, metal Nb sand for surface paper, then use acetone soln ultrasonic cleaning 15～30min; The block body stephanoporate nickel material thin slice with different porosities that step 2 is obtained is with acetone soln ultrasonic cleaning 25min; ZrC-20Vol.%SiC composite ceramics, Nb material, the block body stephanoporate nickel material thin slice with different porosities and Ag-Cu-4.5wt.%Ti are assembled the member after being assembled according to ZrC-20Vol.%SiC composite ceramics, Ag-Cu-4.5wt.%Ti, order with block body stephanoporate nickel material thin slice, Ag-Cu-4.5wt.%Ti and Nb material of different porosities;
Four, the member after the assembling that obtains of step 3 is positioned in vacuum brazing furnace, applies the welding pressure of 3～5MPa, then vacuum in vacuum brazing furnace is evacuated to 1 * 10
-3Pa, then the speed take the rate of heat addition as 10～30 ℃/min is heated to welding temperature and is incubated 20min, welding temperature is 850～950 ℃, then is cooled to room temperature, namely completes soldering.
A kind of method of alleviating the soldered fitting residual stress of this test by appropriate design intermediate porous metal layer and welding procedure, utilizes the deformability of porous metal material and skeleton supporting role to alleviate the soldered fitting residual stress, improves the mechanical property of plumb joint.Show through test, when utilizing Ag-Cu-Ti solder, porous Ni intermediate layer soldering connection ZrC-20Vol.%SiC composite ceramics and Nb material in this test, its room temperature shear strength is brought up to 125MPa from 97MPa, and its intensity has improved 29%.
When with 200 times of SEM, Ag-Cu-Ti solder, porous Ni intermediate layer soldering connection ZrC-20Vol.%SiC composite ceramics and metal Nb are adopted in this test, soldered fitting scans, result as shown in Figure 4, the filling of composite ceramic material and Nb soldered fitting weld seam is good as shown in Figure 4, shaping is attractive in appearance, pore-free, defects i.e.cracks in soldered fitting.The most of porosity characteristic that keeps in porous intermediate layer, its deformability Welded Joints has played the effect of relief of thermal stress.
Claims (9)
1. method of alleviating the soldered fitting residual stress, the method that it is characterized in that alleviating the soldered fitting residual stress is to carry out in accordance with the following steps:
One, preparation intermediate porous metal layer base substrate: be that 100～325 purpose metal dusts are loaded in mould and cold pressing with granularity, obtain the intermediate porous metal layer base substrate; Wherein, pressure is 5～30MPa, and the retention time is 5～15min, and the number of times of colding pressing is 3～5 times;
Two, preparation has the block body stephanoporate metal material thin slice of different porosities: the intermediate porous metal layer base substrate that step 1 is obtained is placed in vacuum drying oven, and then the vacuum with vacuum drying oven is evacuated to 1 * 10
-3Heat-treat after Pa and be incubated, then being cooled to room temperature, obtaining having the block body stephanoporate metal material of different porosities, then utilizing wire cutting method to be cut into the block body stephanoporate metal material thin slice with different porosities that thickness is 0.1～0.5mm;
Three, remove oxide-film and the greasy dirt of material surface to be welded; The block body stephanoporate metal material thin slice with different porosities that step 2 is obtained carries out the organic solvent ultrasonic cleaning; Material to be welded, block body stephanoporate metal material thin slice and solder with different porosities are assembled the member after being assembled;
Four, the member after the assembling that obtains of step 3 is positioned in vacuum brazing furnace, applies the welding pressure of 3～5MPa, then vacuum in vacuum brazing furnace is evacuated to 1 * 10
-3Pa, then the speed take the rate of heat addition as 10～30 ℃/min be heated to welding temperature and the insulation, then be cooled to room temperature, namely complete soldering.
2. a kind of method of alleviating the soldered fitting residual stress according to claim 1, is characterized in that the metal dust in step 1 is Cu, Ni or Nb.
3. a kind of method of alleviating the soldered fitting residual stress according to claim 1, is characterized in that in step 2, heat treatment temperature is 0.5Tm～0.8Tm, and Tm is the fusing point of metal material.
4. a kind of method of alleviating the soldered fitting residual stress according to claim 1, is characterized in that in step 2, temperature retention time is 30～90min.
5. a kind of method of alleviating the soldered fitting residual stress according to claim 1, it is characterized in that the oxide-film of removal material surface to be welded in step 3 and the method for greasy dirt are: to 1000#, then use acetone soln ultrasonic cleaning 15～30min with sand papering material surface to be welded.
6. a kind of method of alleviating the soldered fitting residual stress according to claim 1, the organic solvent that it is characterized in that step 3 is ethanolic solution or acetone soln.
7. a kind of method of alleviating the soldered fitting residual stress according to claim 1 is characterized in that step 3 assembles material to be welded, the block body stephanoporate metal material thin slice with different porosities and solder according to material to be welded, solder, order with block body stephanoporate metal material thin slice, solder and material to be welded of different porosities.
8. a kind of method of alleviating the soldered fitting residual stress according to claim 1, is characterized in that in step 4, temperature retention time is 5～15min.
9. a kind of method of alleviating the soldered fitting residual stress according to claim 1, is characterized in that in step 4, cooldown rate is 5～30 ℃/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100960285A CN103143805A (en) | 2013-03-25 | 2013-03-25 | Method for relieving residual stress of brazed joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100960285A CN103143805A (en) | 2013-03-25 | 2013-03-25 | Method for relieving residual stress of brazed joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103143805A true CN103143805A (en) | 2013-06-12 |
Family
ID=48542273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100960285A Pending CN103143805A (en) | 2013-03-25 | 2013-03-25 | Method for relieving residual stress of brazed joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103143805A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990880A (en) * | 2014-06-06 | 2014-08-20 | 哈尔滨工业大学 | Non-metallic material and metal material brazing method capable of forming interpenetrating network structure brazing seams |
| CN104191057A (en) * | 2014-08-13 | 2014-12-10 | 中国电器科学研究院有限公司 | Preparing method for porous metal matrix compound brazing filler metal alloy soldering head |
| CN104744061A (en) * | 2015-04-13 | 2015-07-01 | 哈尔滨工业大学 | Method for relieving connecting stress between structural ceramic and composite material thereof |
| CN104741722A (en) * | 2015-04-20 | 2015-07-01 | 哈尔滨工业大学（威海） | TiNi solder vacuum brazing TZM alloy and ZrC/W composite method |
| CN105397224A (en) * | 2015-12-28 | 2016-03-16 | 哈尔滨工业大学 | Method for brazing hard alloy and steel by utilizing foam metal interlayer |
| CN105537712A (en) * | 2016-01-28 | 2016-05-04 | 北京航空航天大学 | Ceramic and metal brazing composite component and preparing method thereof |
| CN106750622A (en) * | 2016-11-15 | 2017-05-31 | 广东成松科技发展有限公司 | A kind of intermediate layer material of high intensity suitability high and preparation method thereof |
| CN108907500A (en) * | 2018-08-03 | 2018-11-30 | 北京有色金属与稀土应用研究所 | A kind of high temperature auri active solder and preparation method thereof |
| CN109759665A (en) * | 2019-03-22 | 2019-05-17 | 中山大学 | A kind of ceramic/metal connector preparation method of the TiB whisker reinforcement with three-dimensional netted distribution |
| CN110508892A (en) * | 2019-09-12 | 2019-11-29 | 中山大学 | A kind of connection method of ZrC-SiC composite ceramics and austenitic stainless steel |
| CN111468857A (en) * | 2020-04-15 | 2020-07-31 | 郑州机械研究所有限公司 | Composite solder and preparation method and application thereof |
| CN113001024A (en) * | 2021-03-18 | 2021-06-22 | 松山湖材料实验室 | Laser welding method for dissimilar materials |
| CN113523471A (en) * | 2021-07-06 | 2021-10-22 | 北京科技大学 | Diffusion welding method for tungsten-nickel-iron alloy and high-strength steel for preparing intermediate layer by reducing material |
| CN114029571A (en) * | 2021-12-03 | 2022-02-11 | 湘潭大学 | Method for brazing graphite and titanium alloy by using NiCu porous alloy interlayer |
| CN114043027A (en) * | 2021-11-12 | 2022-02-15 | 哈尔滨工业大学 | Sintering welding method by using melt-leaching method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59184774A (en) * | 1983-04-04 | 1984-10-20 | 三井造船株式会社 | Method of bonding porous ceramics to metal member |
| CN1603440A (en) * | 2004-08-30 | 2005-04-06 | 天津大学 | Process for cold pressing-solving-vacuum sintering preparation of foamed aluminum |
| US6989200B2 (en) * | 2003-10-30 | 2006-01-24 | Alfred E. Mann Foundation For Scientific Research | Ceramic to noble metal braze and method of manufacture |
| CN101260483A (en) * | 2008-04-24 | 2008-09-10 | 中南大学 | Method of preparing nickel-aluminum base alloy porous material |
| CN102357696A (en) * | 2011-07-11 | 2012-02-22 | 江苏科技大学 | Intermediate layer assembly for connecting Si3N4 ceramic and stainless steel and connecting method |
| CN102489811A (en) * | 2011-12-09 | 2012-06-13 | 哈尔滨工业大学 | Method for carrying out self-propagating reaction assisted brazed connection on C/C (carbon/carbon) composites and TiAl |
| CN102643104A (en) * | 2012-05-15 | 2012-08-22 | 哈尔滨工业大学 | Diffusion bonding method of zirconium diboride-silicon carbide composite material and metal alloy |
| CN102699558A (en) * | 2012-06-29 | 2012-10-03 | 哈尔滨工业大学 | Flexible composite middle layer brazing alloy and method of utilizing brazing ceramic and metal |
-
2013
- 2013-03-25 CN CN2013100960285A patent/CN103143805A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59184774A (en) * | 1983-04-04 | 1984-10-20 | 三井造船株式会社 | Method of bonding porous ceramics to metal member |
| US6989200B2 (en) * | 2003-10-30 | 2006-01-24 | Alfred E. Mann Foundation For Scientific Research | Ceramic to noble metal braze and method of manufacture |
| CN1603440A (en) * | 2004-08-30 | 2005-04-06 | 天津大学 | Process for cold pressing-solving-vacuum sintering preparation of foamed aluminum |
| CN101260483A (en) * | 2008-04-24 | 2008-09-10 | 中南大学 | Method of preparing nickel-aluminum base alloy porous material |
| CN102357696A (en) * | 2011-07-11 | 2012-02-22 | 江苏科技大学 | Intermediate layer assembly for connecting Si3N4 ceramic and stainless steel and connecting method |
| CN102489811A (en) * | 2011-12-09 | 2012-06-13 | 哈尔滨工业大学 | Method for carrying out self-propagating reaction assisted brazed connection on C/C (carbon/carbon) composites and TiAl |
| CN102643104A (en) * | 2012-05-15 | 2012-08-22 | 哈尔滨工业大学 | Diffusion bonding method of zirconium diboride-silicon carbide composite material and metal alloy |
| CN102699558A (en) * | 2012-06-29 | 2012-10-03 | 哈尔滨工业大学 | Flexible composite middle layer brazing alloy and method of utilizing brazing ceramic and metal |
Non-Patent Citations (2)
| Title |
|---|
| 欧孝玺，张福勤等: "以Nb为中间层AgCuTi为钎料连接炭/炭复合材料与不锈钢", 《粉末冶金材料科学与工程》 * |
| 郭义，何治经等: "Nb中间层在Si3N4/40Cr钢钎焊接头中的作用", 《材料研究导报》 * |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990880A (en) * | 2014-06-06 | 2014-08-20 | 哈尔滨工业大学 | Non-metallic material and metal material brazing method capable of forming interpenetrating network structure brazing seams |
| CN103990880B (en) * | 2014-06-06 | 2015-12-02 | 哈尔滨工业大学 | The nonmetallic materials of inierpeneirating network structure brazed seam and the method for welding of metal material can be formed |
| CN104191057A (en) * | 2014-08-13 | 2014-12-10 | 中国电器科学研究院有限公司 | Preparing method for porous metal matrix compound brazing filler metal alloy soldering head |
| CN104744061A (en) * | 2015-04-13 | 2015-07-01 | 哈尔滨工业大学 | Method for relieving connecting stress between structural ceramic and composite material thereof |
| CN104741722A (en) * | 2015-04-20 | 2015-07-01 | 哈尔滨工业大学（威海） | TiNi solder vacuum brazing TZM alloy and ZrC/W composite method |
| CN104741722B (en) * | 2015-04-20 | 2018-07-20 | 哈尔滨工业大学（威海） | The method of TiNi solder vacuum brazing TZM alloys and ZrC/W composite materials |
| CN105397224A (en) * | 2015-12-28 | 2016-03-16 | 哈尔滨工业大学 | Method for brazing hard alloy and steel by utilizing foam metal interlayer |
| CN105537712A (en) * | 2016-01-28 | 2016-05-04 | 北京航空航天大学 | Ceramic and metal brazing composite component and preparing method thereof |
| CN106750622A (en) * | 2016-11-15 | 2017-05-31 | 广东成松科技发展有限公司 | A kind of intermediate layer material of high intensity suitability high and preparation method thereof |
| CN108907500A (en) * | 2018-08-03 | 2018-11-30 | 北京有色金属与稀土应用研究所 | A kind of high temperature auri active solder and preparation method thereof |
| CN109759665A (en) * | 2019-03-22 | 2019-05-17 | 中山大学 | A kind of ceramic/metal connector preparation method of the TiB whisker reinforcement with three-dimensional netted distribution |
| CN110508892A (en) * | 2019-09-12 | 2019-11-29 | 中山大学 | A kind of connection method of ZrC-SiC composite ceramics and austenitic stainless steel |
| CN110508892B (en) * | 2019-09-12 | 2021-06-18 | 中山大学 | Method for connecting ZrC-SiC composite ceramic and austenitic stainless steel |
| CN111468857A (en) * | 2020-04-15 | 2020-07-31 | 郑州机械研究所有限公司 | Composite solder and preparation method and application thereof |
| CN113001024A (en) * | 2021-03-18 | 2021-06-22 | 松山湖材料实验室 | Laser welding method for dissimilar materials |
| CN113523471A (en) * | 2021-07-06 | 2021-10-22 | 北京科技大学 | Diffusion welding method for tungsten-nickel-iron alloy and high-strength steel for preparing intermediate layer by reducing material |
| CN113523471B (en) * | 2021-07-06 | 2022-04-15 | 北京科技大学 | Diffusion welding method for tungsten-nickel-iron alloy and high-strength steel for preparing intermediate layer by reducing material |
| CN114043027A (en) * | 2021-11-12 | 2022-02-15 | 哈尔滨工业大学 | Sintering welding method by using melt-leaching method |
| CN114043027B (en) * | 2021-11-12 | 2024-01-12 | 哈尔滨工业大学 | Fusion leaching sintering welding method |
| CN114029571A (en) * | 2021-12-03 | 2022-02-11 | 湘潭大学 | Method for brazing graphite and titanium alloy by using NiCu porous alloy interlayer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103143805A (en) | Method for relieving residual stress of brazed joint | |
| CN103990880B (en) | The nonmetallic materials of inierpeneirating network structure brazed seam and the method for welding of metal material can be formed | |
| CN104475898B (en) | The foreign material method for welding of porous interlayer structure brazed seam | |
| CN103341674A (en) | Graphene auxiliary brazing method for ceramic matrix composite material and metal material | |
| CN102275022B (en) | Connecting method of C/C composite material and copper or copper alloy | |
| CN105346161A (en) | Tungsten/transition layer/steel composite material and low-temperature and low-pressure active diffusion connection preparation method thereof | |
| CN102430829B (en) | Method for raising brazing strength for ZrB2-based material | |
| JP5698947B2 (en) | Heat sink for electronic device and method for manufacturing the same | |
| CN106041350B (en) | tungsten/copper or tungsten/steel joint and preparation method thereof | |
| CN106808079A (en) | A kind of TiAl alloy and Ti2The diffusion connection method of AlNb alloys | |
| CN110734296B (en) | Connecting joint based on nickel-based superalloy and ceramic and preparation method thereof | |
| CN113878220B (en) | Tungsten and steel layered metal composite material and diffusion bonding method thereof | |
| CN102699558A (en) | Flexible composite middle layer brazing alloy and method of utilizing brazing ceramic and metal | |
| CN102513636B (en) | Brazing method capable of reducing residual stress on ceramic and metal joints | |
| CN106825896A (en) | A kind of hard alloy connects method with the composite interlayer liquid-phase diffusion welding of steel | |
| CN102643104B (en) | Diffusion bonding method of zirconium diboride-silicon carbide composite material and metal alloy | |
| CN102219538B (en) | Solder for bonding C/SiC composite material with Ni-based alloy and bonding method | |
| CN103480851B (en) | Graded connector suitable for titanium-steel dissimilar metal connection | |
| CN106270889A (en) | A kind of add the method that TC4 and Ceramic brazing performance are improved in foam copper intermediate layer | |
| CN113732467B (en) | Composite intermediate layer for tungsten/steel connecting piece and diffusion welding method | |
| CN106862693A (en) | A kind of tungsten/copper or tungsten/steel joint and preparation method thereof | |
| CN103753123A (en) | Method for manufacturing multilayer amorphous alloy and copper composite structure through intermediate layer diffusion | |
| CN109759665B (en) | Preparation method of TiB whisker reinforced ceramic/metal joint with three-dimensional net distribution | |
| CN103204694B (en) | Method for diffusely connecting TiAl-based alloy and Ti3AlC2 ceramic by adopting Zr/Ni composite intermediate layer | |
| CN116900247B (en) | Preparation method of ceramic matrix composite and monocrystalline superalloy composite component |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130612 |