CN102689108A - Composite brazing material for connecting Si3N4 ceramic and 42CrMo steel and brazing method by using same - Google Patents
Composite brazing material for connecting Si3N4 ceramic and 42CrMo steel and brazing method by using same Download PDFInfo
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- CN102689108A CN102689108A CN2012102052459A CN201210205245A CN102689108A CN 102689108 A CN102689108 A CN 102689108A CN 2012102052459 A CN2012102052459 A CN 2012102052459A CN 201210205245 A CN201210205245 A CN 201210205245A CN 102689108 A CN102689108 A CN 102689108A
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Abstract
The invention relates to a brazing material for connecting ceramic and steel and a brazing method, particularly a composite brazing material for connecting Si3N4 ceramic and 42CrMo steel and a brazing method by using the same... The invention aims to solve the problems of high residual stress and low strength of the brazing joint formed by connecting the Si3N4 ceramic and 42CrMo steel by the existing brazing material. The brazing material is prepared from Ag powder, Cu powder, Ti powder and a reinforcing phase. The method comprises the following steps: mixing Ag powder, Cu powder, Ti powder and an reinforcing phase, carrying out ball milling, mixing with hydroxyethyl cellulose, and drying to obtain a composite brazing material sheet; putting the composite brazing material sheet between the to-be-brazed surface of the Si3N4 ceramic and the to-be-brazed surface of the 42CrMo steel to obtain a to-be-brazed piece; and putting the to-be-brazed piece in a vacuum brazing furnace to carry out vacuum brazing, thereby completing the brazing of the composite brazing material for connecting the Si3N4 ceramic and the 42CrMo steel. The invention has the advantages of low residual stress and high strength of the brazing joint, and is applicable to brazing connection of ceramic and steel.
Description
Technical field
The present invention relates to connect the composite soldering of pottery and solder bonding metal and carry out the method for soldering with it.
Background technology
Advanced structural ceramic is as a kind of new structural material; Unique excellent properties such as, high strength high temperature resistant, exceptional hardness, wear-resistant, anticorrosive and low thermal conductance with it; In industries such as national defence, the energy, Aero-Space, machinery, petrochemical industry, metallurgy, electronics; Demonstrate wide application prospect day by day, cause the attention of each industrially developed country, competitively drop into great amount of manpower and material resources research.
Silicon nitride ceramics (Si
3N
4) be the important component part in the current engineering structure new material.Be typical covalent bonds between Si and the N in such pottery, cause Si
3N
4Pottery has physics, chemistry and the mechanical property of a series of excellences; Like low thermal coefficient of expansion, anti-oxidant, high temperature resistant, corrosion-resistant, high intrinsic strength, hardness, wear-resistant and excellent high-temperature mechanical property; Being to have one of material of application prospect in the structural ceramics most, also is development new type high temperature structural material very rapidly.Because Si
3N
4Brittleness of ceramics is big, ductility is low, be difficult to distortion and cut difficulty.In addition, the fragility that ceramic material is intrinsic can cause minimum critical crack, has increased the difficulty of ceramic component in fabrication and processing, has hindered the application on engineering structure.Metal material has good plasticity and toughness usually, but its high-temperature behavior, hardness, corrosion resistance are relatively poor.In the practical application, can reasonably be integrated metal and ceramic junction, can obtain the good ceramic-metal structural member of combination property according to concrete requirement.Therefore, in order to give full play to the advantage of two types of materials, must solve the connectivity problem of pottery and metal.
At present, the active metal brazing method is because operating procedure is simple, bonding strength is high, joint dimension and shape wide adaptability etc. become and are connected Si
3N
4The prefered method of pottery and metal, various countries material supplier author has carried out a large amount of research on the solder that connects pottery is selected, and the solder system that develops comparative maturity now is mainly Ag-Cu-Ti, and this solder is to Si
3N
4Pottery has shown good wettability.Yet, because this solder and connected Si
3N
4Have bigger thermal expansion coefficient difference between the pottery, be cooled to the room temperature process from brazing temperature, be easy to generate high residual stress in the joint, this has damaged the switching performance of joint to a certain extent.
Summary of the invention
The present invention seeks to connect Si in order to solve existing composite soldering soldering
3N
4The high residual stress that the resulting welding point of pottery and 42CrMo steel produces, the problem that strength of joint is low connects Si and provide
3N
4The pottery and the composite soldering of 42CrMo steel and carry out the method for soldering with it.
The present invention is used to connect Si
3N
4The composite soldering of pottery and 42CrMo steel is made up of mixed-powder and wild phase; Wherein mixed-powder is that 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are formed by mass percent; Wild phase is Mo powder or the WC powder that accounts for mixed-powder percent by volume 5%～40%.
The present invention connects Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering is to realize through the following step:
One, by mass percentage 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are mixed, obtain mixed-powder;
Two, in mixed-powder, add the wild phase that accounts for mixed-powder percent by volume 5%～40%, obtain powders A, then powders A is put into ball grinder, the rotating speed ball-milling treatment 1～10h with 200～300r/min obtains composite soldering;
Three, composite soldering and hydroxyethylcellulose are mixed into paste, under 20～100 ℃ of temperature, being dried into thickness is the composite soldering thin slice of 80～260 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, the composite soldering thin slice is assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix, obtain weld parts with 502 glue;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 100～160Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3～3.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering;
Wherein said wild phase is Mo powder or WC powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering mixes by mass ratio 95 : 5 with hydroxyethylcellulose in the step 3.
The present invention connects Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering is to realize through the following step:
One, by mass percentage 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are mixed, obtain mixed-powder, then mixed-powder is divided into A part and B part;
Two, in A part mixed-powder, add the wild phase that accounts for A part mixed-powder percent by volume 5%～10%; In B part mixed-powder, add the wild phase that accounts for B part mixed-powder percent by volume 11%～40%; Obtain powders A and powder B; Then powders A and powder B are put into ball grinder respectively, the rotating speed ball-milling treatment 1～10h with 200～300r/min obtains composite soldering A and composite soldering B;
Three, composite soldering A and composite soldering B are mixed into paste with hydroxyethylcellulose respectively, under 20～100 ℃ of temperature, being dried into every thickness is composite soldering thin slice A and the composite soldering thin slice B of 80～260 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, composite soldering thin slice A and B are assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix with 502 glue, obtain weld parts, composite soldering thin slice B places Si
3N
4Pottery surface to be welded one side, composite soldering thin slice A places surface to be welded one side of 42CrMo steel, forms from Si
3N
4Pottery surface to be welded wild phase volume percent content graded from high to low in the surface to be welded composite soldering of 42CrMo steel;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 100～160Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3～3.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering;
Wherein said wild phase is Mo powder or WC powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering A mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose in the step 3; Composite soldering B mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose.
The present invention connects Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering is to realize through the following step:
One, by mass percentage 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are mixed, obtain mixed-powder, then mixed-powder is divided into A part, B part and C part;
Two, in A part mixed-powder, add the wild phase that accounts for A part mixed-powder percent by volume 5%～10%; In B part mixed-powder, add the wild phase that accounts for B part mixed-powder percent by volume 11%～19%; In C part mixed-powder, add the wild phase that accounts for C part mixed-powder percent by volume 20%～40%; Obtain powders A, powder B and powder C; Then powders A, powder B and powder C are put into ball grinder respectively, the rotating speed ball-milling treatment 1～10h with 200～300r/min obtains composite soldering A, composite soldering B and composite soldering C;
Three, composite soldering A, composite soldering B and composite soldering C are mixed into paste with hydroxyethylcellulose respectively, under 20～100 ℃ of temperature, being dried into every thickness is composite soldering thin slice A, composite soldering thin slice B and the composite soldering chips C of 80～260 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, composite soldering thin slice A, B and C are assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix with 502 glue, obtain weld parts, the composite soldering chips C places Si
3N
4Pottery surface to be welded one side, composite soldering thin slice A places surface to be welded one side of 42CrMo steel, and composite soldering thin slice B places between composite soldering chips C and the composite soldering thin slice A, forms from Si
3N
4Pottery surface to be welded wild phase volume percent content graded from high to low in the surface to be welded composite soldering of 42CrMo steel;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 100～160Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3～3.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering;
Wherein said wild phase is Mo powder or WC powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering A mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose in the step 3; Composite soldering B mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose; Composite soldering C mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose.
Provided by the inventionly be used to connect Si
3N
4Ag and Cu in the composite soldering of pottery and 42CrMo steel all have good plasticity, and Ti is an active element, realize that in brazing process composite soldering is to Si
3N
4The good wettability of pottery and 42CrMo steel.The present invention connects Si
3N
4Pottery has reduced soldering with the composite soldering of 42CrMo steel and has been connected Si
3N
4The high residual stress that the resulting welding point of pottery and 42CrMo steel produces has improved soldered fitting intensity.
Connect Si
3N
4The brazing process of the composite soldering of pottery and 42CrMo steel through the graded of wild phase volume percent content in the composite soldering, realizes that elastic modelling quantity or linear expansion coefficient are from being connected Si
3N
4Pottery is to the graded of 42CrMo steel.Si
3N
4Pottery and 42CrMo steel are as the engineering common used material, so the present invention is applied to connect Si
3N
4The composite soldering of pottery and 42CrMo steel carries out having a extensive future of soldering.
Description of drawings
Fig. 1 is the backscattered electron photo of the specific embodiment 12 composite soldering soldered fittings;
Fig. 2 is the backscattered electron photo of the specific embodiment 13 composite soldering soldered fittings;
Fig. 3 is the backscattered electron photo of the specific embodiment 14 composite soldering soldered fittings;
Fig. 4 is the specific embodiment 14 composite soldering thin slice installation diagrams, 1 expression composite soldering.
The specific embodiment
The specific embodiment one: this embodiment is used to connect Si
3N
4The composite soldering of pottery and 42CrMo steel is made up of mixed-powder and wild phase; Wherein mixed-powder is that 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are formed by mass percent; Wild phase is Mo powder or the WC powder that accounts for mixed-powder percent by volume 5%～40%.
The specific embodiment two: what this embodiment and the specific embodiment one were different is to be used to connect Si
3N
4The composite soldering of pottery and 42CrMo steel is made up of mixed-powder and wild phase; Wherein mixed-powder is that 65%～73% Ag powder, 22%～30% Cu powder and 4%～5.5% Ti powder are formed by mass percent; Wild phase is Mo powder or the WC powder that accounts for mixed-powder percent by volume 10%～30%.
The specific embodiment three: this embodiment adopts that the specific embodiment one is described to be used to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering is to realize through following steps:
One, by mass percentage 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are mixed, obtain mixed-powder;
Two, in mixed-powder, add the wild phase that accounts for mixed-powder percent by volume 5%～40%, obtain powders A, then powders A is put into ball grinder, the rotating speed ball-milling treatment 1～10h with 200～300r/min obtains composite soldering;
Three, composite soldering and hydroxyethylcellulose are mixed into paste, under 20～100 ℃ of temperature, being dried into thickness is the composite soldering thin slice of 80～260 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, the composite soldering thin slice is assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix, obtain weld parts with 502 glue;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 100～160Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3～3.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering;
Wherein said wild phase is Mo powder or WC powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering mixes by mass ratio 95 : 5 with hydroxyethylcellulose in the step 3.
This embodiment step 4 is used B with before the acetone ultrasonic cleaning
4C is with Si
3N
4The pottery surface to be welded polishes flat, and the diamond paste of using W3.5 and W0.5 successively then is with Si
3N
4The pottery surface to be welded grinds smooth; 42CrMo steel surface to be welded is polished flat with 600#, 1000# and 1600# abrasive paper for metallograph successively, and using model then respectively is that the diamond polishing agent of 0.5 μ m is with Si
3N
4The surface to be welded polishing of pottery surface to be welded and 42CrMo steel.
The specific embodiment four: this embodiment and the specific embodiment three are different is that step 1 is mixed 70% Ag powder, 25% Cu powder and 5% Ti powder by mass percentage.Other step and parameter are identical with the specific embodiment three.
The specific embodiment five: what this embodiment was different with the specific embodiment three or four is that step 2 adds the wild phase that accounts for mixed-powder percent by volume 20% in mixed-powder.Other step and parameter are identical with the specific embodiment three or four.
The specific embodiment six: this embodiment adopts that the specific embodiment one is described to be used to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering is to realize through following steps:
One, by mass percentage 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are mixed, obtain mixed-powder, then mixed-powder is divided into A part and B part;
Two, in A part mixed-powder, add the wild phase that accounts for A part mixed-powder percent by volume 5%～10%; In B part mixed-powder, add the wild phase that accounts for B part mixed-powder percent by volume 11%～40%; Obtain powders A and powder B; Then powders A and powder B are put into ball grinder respectively, the rotating speed ball-milling treatment 1～10h with 200～300r/min obtains composite soldering A and composite soldering B;
Three, composite soldering A and composite soldering B are mixed into paste with hydroxyethylcellulose respectively, under 20～100 ℃ of temperature, being dried into every thickness is composite soldering thin slice A and the composite soldering thin slice B of 80～260 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, composite soldering thin slice A and B are assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix with 502 glue, obtain weld parts, composite soldering thin slice B places Si
3N
4Pottery surface to be welded one side, composite soldering thin slice A places surface to be welded one side of 42CrMo steel, forms from Si
3N
4Pottery surface to be welded wild phase volume percent content graded from high to low in the surface to be welded composite soldering of 42CrMo steel;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 100～160Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3～3.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering;
Wherein said wild phase is Mo powder or WC powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering A mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose in the step 3; Composite soldering B mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose.
This embodiment step 4 is used B with before the acetone ultrasonic cleaning
4C is with Si
3N
4The pottery surface to be welded polishes flat, and the diamond paste of using W3.5 and W0.5 successively then is with Si
3N
4The pottery surface to be welded grinds smooth; 42CrMo steel surface to be welded is polished flat with 600#, 1000# and 1600# abrasive paper for metallograph successively, and using model then respectively is that the diamond polishing agent of 0.5 μ m is with Si
3N
4The surface to be welded polishing of pottery surface to be welded and 42CrMo steel.
The specific embodiment seven: what this embodiment and the specific embodiment six were different is that step 2 adds the wild phase that accounts for A part mixed-powder percent by volume 6% in A part mixed-powder, in B part mixed-powder, adds the wild phase that accounts for B part mixed-powder percent by volume 22%.Other step and parameter and specific embodiment six phase are together.
The specific embodiment eight: that this embodiment is different with the specific embodiment six or seven is the rotating speed ball-milling treatment 3～8h of step 2 with 220～260r/min.Other step and parameter are identical with the specific embodiment six or seven.
The specific embodiment nine: what this embodiment was different with one of specific embodiment six to eight is that step 3 is dried into composite soldering thin slice A and the composite soldering thin slice B that every thickness is 100～160 μ m under 30～80 ℃ of temperature.Other step and parameter are identical with one of specific embodiment six to eight.
The specific embodiment ten: this embodiment adopts that the specific embodiment one is described to be used to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering is to realize through following steps:
One, by mass percentage 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are mixed, obtain mixed-powder, then mixed-powder is divided into A part, B part and C part;
Two, in A part mixed-powder, add the wild phase that accounts for A part mixed-powder percent by volume 5%～10%; In B part mixed-powder, add the wild phase that accounts for B part mixed-powder percent by volume 11%～19%; In C part mixed-powder, add the wild phase that accounts for C part mixed-powder percent by volume 20%～40%; Obtain powders A, powder B and powder C; Then powders A, powder B and powder C are put into ball grinder respectively, the rotating speed ball-milling treatment 1～10h with 200～300r/min obtains composite soldering A, composite soldering B and composite soldering C;
Three, composite soldering A, composite soldering B and composite soldering C are mixed into paste with hydroxyethylcellulose respectively, under 20～100 ℃ of temperature, being dried into every thickness is composite soldering thin slice A, composite soldering thin slice B and the composite soldering chips C of 80～260 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, composite soldering thin slice A, B and C are assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix with 502 glue, obtain weld parts, the composite soldering chips C places Si
3N
4Pottery surface to be welded one side, composite soldering thin slice A places surface to be welded one side of 42CrMo steel, and composite soldering thin slice B places between composite soldering chips C and the composite soldering thin slice A, forms from Si
3N
4Pottery surface to be welded wild phase volume percent content graded from high to low in the surface to be welded composite soldering of 42CrMo steel;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 100～160Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3～3.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering;
Wherein said wild phase is Mo powder or WC powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering A mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose in the step 3; Composite soldering B mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose; Composite soldering C mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose.
This embodiment step 4 is used B with before the acetone ultrasonic cleaning
4C is with Si
3N
4The pottery surface to be welded polishes flat, and the diamond paste of using W3.5 and W0.5 successively then is with Si
3N
4The pottery surface to be welded grinds smooth; 42CrMo steel surface to be welded is polished flat with 600#, 1000# and 1600# abrasive paper for metallograph successively, and using model then respectively is that the diamond polishing agent of 0.5 μ m is with Si
3N
4The surface to be welded polishing of pottery surface to be welded and 42CrMo steel.
The specific embodiment 11: what this embodiment and the specific embodiment ten were different is that step 2 adds the wild phase that accounts for A part mixed-powder percent by volume 8% in A part mixed-powder; In B part mixed-powder, add the wild phase that accounts for B part mixed-powder percent by volume 16%, in C part mixed-powder, add the wild phase that accounts for C part mixed-powder percent by volume 25%.Other step and parameter are identical with the specific embodiment ten.
The specific embodiment 12: this embodiment adopts that the specific embodiment one is described to be used to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering is to realize through following steps:
One, by mass percentage 69% Ag powder, 27% Cu powder and 4% Ti powder are mixed, obtain mixed-powder;
Two, in mixed-powder, add the wild phase that accounts for mixed-powder percent by volume 10%, obtain powders A, then powders A is put into ball grinder, the rotating speed ball-milling treatment 2h with 250r/min obtains composite soldering;
Three, composite soldering and hydroxyethylcellulose are mixed into paste, under 80 ℃ of temperature, being dried into thickness is the composite soldering thin slice of 240 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, the composite soldering thin slice is assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix, obtain weld parts with 502 glue;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 120Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering;
Wherein said wild phase is the Mo powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering mixes by mass ratio 95 : 5 with hydroxyethylcellulose in the step 3.
This embodiment step 4 is used B with before the acetone ultrasonic cleaning
4C is with Si
3N
4The pottery surface to be welded polishes flat, and the diamond paste of using W3.5 and W0.5 successively then is with Si
3N
4The pottery surface to be welded grinds smooth; 42CrMo steel surface to be welded is polished flat with 600#, 1000# and 1600# abrasive paper for metallograph successively, and using model then respectively is that the diamond polishing agent of 0.5 μ m is with Si
3N
4The surface to be welded polishing of pottery surface to be welded and 42CrMo steel.
This embodiment adopts and connects Si
3N
4The backscattered electron photo of the composite soldering soldered fitting of pottery and 42CrMo steel is as shown in Figure 1.The three-point bending strength that adopts three-point bending strength to record the soldered fitting of this embodiment is 587.3Mpa.
The specific embodiment 13: this embodiment is used to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering is to realize through following steps:
The present invention connects Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering is to realize through the following step:
One, by mass percentage 69% Ag powder, 27% Cu powder and 4% Ti powder are mixed, obtain mixed-powder, then mixed-powder is divided into A part and B part;
Two, in A part mixed-powder, add the wild phase that accounts for A part mixed-powder percent by volume 5%; In B part mixed-powder, add the wild phase that accounts for B part mixed-powder percent by volume 20%; Obtain powders A and powder B; Then powders A and powder B are put into ball grinder respectively, the rotating speed ball-milling treatment 2h with 250r/min obtains composite soldering A and composite soldering B;
Three, composite soldering A and composite soldering B are mixed into paste with hydroxyethylcellulose respectively, under 80 ℃ of temperature, are dried into composite soldering thin slice A and composite soldering thin slice B that every thickness is 120 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, composite soldering thin slice A and B are assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix with 502 glue, obtain weld parts, composite soldering thin slice B places Si
3N
4Pottery surface to be welded one side, composite soldering thin slice A places surface to be welded one side of 42CrMo steel, forms from Si
3N
4Pottery surface to be welded wild phase volume percent content graded from high to low in the surface to be welded composite soldering of 42CrMo steel;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 120Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering;
Wherein said wild phase is the Mo powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering A mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose in the step 3; Composite soldering B mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose.
This embodiment step 4 is used B with before the acetone ultrasonic cleaning
4C is with Si
3N
4The pottery surface to be welded polishes flat, and the diamond paste of using W3.5 and W0.5 successively then is with Si
3N
4The pottery surface to be welded grinds smooth; 42CrMo steel surface to be welded is polished flat with 600#, 1000# and 1600# abrasive paper for metallograph successively, and using model then respectively is that the diamond polishing agent of 0.5 μ m is with Si
3N
4The surface to be welded polishing of pottery surface to be welded and 42CrMo steel.
This embodiment adopts and connects Si
3N
4The backscattered electron photo of the complex gradient solder brazing joint of pottery and 42CrMo drill steel welding is as shown in Figure 2.The three-point bending strength that adopts three-point bending strength to record the soldered fitting of this embodiment is 346.4Mpa.
The specific embodiment 14: this embodiment is used to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering is to realize through following steps:
One, by mass percentage 69% Ag powder, 27% Cu powder and 4% Ti powder are mixed, obtain mixed-powder, then mixed-powder is divided into A part, B part and C part;
Two, in A part mixed-powder, add the wild phase that accounts for A part mixed-powder percent by volume 5%; In B part mixed-powder, add the wild phase that accounts for B part mixed-powder percent by volume 15%; In C part mixed-powder, add the wild phase that accounts for C part mixed-powder percent by volume 30%, obtain powders A, powder B and powder C, then powders A, powder B and powder C are put into ball grinder respectively; Rotating speed ball-milling treatment 2h with 250r/min obtains composite soldering A, composite soldering B and composite soldering C;
Three, composite soldering A, composite soldering B and composite soldering C are mixed into paste with hydroxyethylcellulose respectively, under 80 ℃ of temperature, being dried into every thickness is composite soldering thin slice A, composite soldering thin slice B and the composite soldering chips C of 80 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, composite soldering thin slice A, B and C are assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix with 502 glue, obtain weld parts, the composite soldering chips C places Si
3N
4Pottery surface to be welded one side, composite soldering thin slice A places surface to be welded one side of 42CrMo steel, and composite soldering thin slice B places between composite soldering chips C and the composite soldering thin slice A, forms from Si
3N
4Pottery surface to be welded wild phase volume percent content graded from high to low in the surface to be welded composite soldering of 42CrMo steel;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 120Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to adopt to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo drill steel welding carries out soldering;
Wherein said wild phase is the Mo powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering A mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose in the step 3; Composite soldering B mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose; Composite soldering C mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose.
This embodiment step 4 is used B with before the acetone ultrasonic cleaning
4C is with Si
3N
4The pottery surface to be welded polishes flat, and the diamond paste of using W3.5 and W0.5 successively then is with Si
3N
4The pottery surface to be welded grinds smooth; 42CrMo steel surface to be welded is polished flat with 600#, 1000# and 1600# abrasive paper for metallograph successively, and using model then respectively is that the diamond polishing agent of 0.5 μ m is with Si
3N
4The surface to be welded polishing of pottery surface to be welded and 42CrMo steel.
This embodiment adopts and connects Si
3N
4The backscattered electron photo of the composite soldering soldered fitting of pottery and 42CrMo drill steel welding is as shown in Figure 3.Composite soldering thin slice installation diagram is as shown in Figure 4.The three-point bending strength that adopts three-point bending strength to record the soldered fitting of this embodiment is 215.8MPa.
Claims (8)
1. connect Si
3N
4The composite soldering of pottery and 42CrMo steel is characterized in that connecting Si
3N
4The composite soldering of pottery and 42CrMo steel is made up of mixed-powder and wild phase; Wherein mixed-powder is that 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are formed by mass percent; Wild phase is Mo powder or the WC powder that accounts for mixed-powder percent by volume 5%～40%.
2. connection Si according to claim 1
3N
4The composite soldering of pottery and 42CrMo steel is characterized in that connecting Si
3N
4The composite soldering of pottery and 42CrMo steel is made up of mixed-powder and wild phase; Wherein mixed-powder is that 65%～73% Ag powder, 22%～30% Cu powder and 4%～5.5% Ti powder are formed by mass percent; Wild phase is Mo powder or the WC powder that accounts for mixed-powder percent by volume 10%～30%.
3. adopt connection Si as claimed in claim 1
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering, the method that it is characterized in that soldering is to realize through the following step:
One, by mass percentage 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are mixed, obtain mixed-powder;
Two, in mixed-powder, add the wild phase that accounts for mixed-powder percent by volume 5%～40%, obtain powders A, then powders A is put into ball grinder, the rotating speed ball-milling treatment 1～10h with 200～300r/min obtains composite soldering;
Three, composite soldering and hydroxyethylcellulose are mixed into paste, under 20～100 ℃ of temperature, being dried into thickness is the composite soldering thin slice of 80～260 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, the composite soldering thin slice is assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix, obtain weld parts with 502 glue;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 100～160Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3～3.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering; Wherein said wild phase is Mo powder or WC powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering mixes by mass ratio 95 : 5 with hydroxyethylcellulose in the step 3.
4. adopt connection Si as claimed in claim 1
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering, the method that it is characterized in that soldering is to realize through the following step:
One, by mass percentage 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are mixed, obtain mixed-powder, then mixed-powder is divided into A part and B part;
Two, in A part mixed-powder, add the wild phase that accounts for A part mixed-powder percent by volume 5%～10%; In B part mixed-powder, add the wild phase that accounts for B part mixed-powder percent by volume 11%～40%; Obtain powders A and powder B; Then powders A and powder B are put into ball grinder respectively, the rotating speed ball-milling treatment 1～10h with 200～300r/min obtains composite soldering A and composite soldering B;
Three, composite soldering A and composite soldering B are mixed into paste with hydroxyethylcellulose respectively, under 20～100 ℃ of temperature, being dried into every thickness is composite soldering thin slice A and the composite soldering thin slice B of 80～260 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, composite soldering thin slice A and B are assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix with 502 glue, obtain weld parts, composite soldering thin slice B places Si
3N
4Pottery surface to be welded one side, composite soldering thin slice A places surface to be welded one side of 42CrMo steel, forms from Si
3N
4Pottery surface to be welded wild phase volume percent content graded from high to low in the surface to be welded composite soldering of 42CrMo steel;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 100～160Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3～3.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering;
Wherein said wild phase is Mo powder or WC powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering A mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose in the step 3; Composite soldering B mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose.
5. connection Si according to claim 4
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering; It is characterized in that step 2 adds the wild phase that accounts for A part mixed-powder percent by volume 6% in A part mixed-powder, in B part mixed-powder, add the wild phase that accounts for B part mixed-powder percent by volume 22%.
6. according to claim 4 or 5 described connection Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering, step 3 is dried into composite soldering thin slice A and the composite soldering thin slice B that every thickness is 100～160 μ m under 30～80 ℃ of temperature.
7. adopt connection Si as claimed in claim 1
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering, the method that it is characterized in that soldering is to realize through the following step:
One, by mass percentage 60%～75% Ag powder, 20%～35% Cu powder and 3%～6% Ti powder are mixed, obtain mixed-powder, then mixed-powder is divided into A part, B part and C part;
Two, in A part mixed-powder, add the wild phase that accounts for A part mixed-powder percent by volume 5%～10%; In B part mixed-powder, add the wild phase that accounts for B part mixed-powder percent by volume 11%～19%; In C part mixed-powder, add the wild phase that accounts for C part mixed-powder percent by volume 20%～40%; Obtain powders A, powder B and powder C; Then powders A, powder B and powder C are put into ball grinder respectively, the rotating speed ball-milling treatment 1～10h with 200～300r/min obtains composite soldering A, composite soldering B and composite soldering C;
Three, composite soldering A, composite soldering B and composite soldering C are mixed into paste with hydroxyethylcellulose respectively, under 20～100 ℃ of temperature, being dried into every thickness is composite soldering thin slice A, composite soldering thin slice B and the composite soldering chips C of 80～260 μ m;
Four, with Si
3N
4The pottery and the surface to be welded of 42CrMo steel take out after with acetone ultrasonic cleaning 30min, dry naturally;
Five, composite soldering thin slice A, B and C are assemblied in the Si after the cleaning
3N
4Between the surface to be welded of pottery and 42CrMo steel, fix with 502 glue, obtain weld parts, the composite soldering chips C places Si
3N
4Pottery surface to be welded one side, composite soldering thin slice A places surface to be welded one side of 42CrMo steel, and composite soldering thin slice B places between composite soldering chips C and the composite soldering thin slice A, forms from Si
3N
4Pottery surface to be welded wild phase volume percent content graded from high to low in the surface to be welded composite soldering of 42CrMo steel;
Six, the weld parts that step 5 is obtained places vacuum brazing furnace, is forced into 100～160Pa at the weld parts two ends, is evacuated to 1.0 * 10
-3～3.0 * 10
-3Pa is warmed up to 300 ℃ with the firing rate of 10 ℃/min with weld parts, insulation 30min, and the speed with 10 ℃/min is warmed up to 900 ℃ then, insulation 10min, the speed with 5 ℃/min is cooled to 300 ℃ again, cools to room temperature then with the furnace, promptly accomplishes to connect Si
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering; Wherein said wild phase is Mo powder or WC powder, and ball material mass ratio is 10 ︰ 1 in the step 2;
Composite soldering A mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose in the step 3; Composite soldering B mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose; Composite soldering C mixes by mass ratio 95 ﹕ 5 with hydroxyethylcellulose.
8. connection Si according to claim 7
3N
4The method that the composite soldering of pottery and 42CrMo steel carries out soldering; It is characterized in that step 2 adds the wild phase that accounts for A part mixed-powder percent by volume 8% in A part mixed-powder; In B part mixed-powder, add the wild phase that accounts for B part mixed-powder percent by volume 16%, in C part mixed-powder, add the wild phase that accounts for C part mixed-powder percent by volume 25%.
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| CN2012102052459A CN102689108A (en) | 2012-06-20 | 2012-06-20 | Composite brazing material for connecting Si3N4 ceramic and 42CrMo steel and brazing method by using same |
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|---|---|---|---|
| CN2012102052459A CN102689108A (en) | 2012-06-20 | 2012-06-20 | Composite brazing material for connecting Si3N4 ceramic and 42CrMo steel and brazing method by using same |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103042282A (en) * | 2012-12-24 | 2013-04-17 | 镇江大有硬质材料有限公司 | Method for brazing diamond drilling tools |
| CN103358048A (en) * | 2013-07-25 | 2013-10-23 | 杭州华光焊接新材料股份有限公司 | Silver, copper and phosphorus system vacuum brazing filler |
| CN103467127A (en) * | 2013-09-05 | 2013-12-25 | 天津大学 | Brazed connection method of titanium alloy and silicon nitride ceramics |
| CN103752971A (en) * | 2013-12-13 | 2014-04-30 | 天津大学 | Method for connecting TC4 titanium alloy with silicon nitride ceramic by brazing connection with solders of titanium-silver-copper |
| CN103759864A (en) * | 2014-01-26 | 2014-04-30 | 中国电子科技集团公司第四十九研究所 | Ceramic packaging structure and pressure sensitive apparatus shell of ceramic packaging structure |
| CN104475898A (en) * | 2014-12-26 | 2015-04-01 | 哈尔滨工业大学 | Dissimilar material brazing method of porous intermediate layer structure brazing seam |
| CN104708160A (en) * | 2015-01-30 | 2015-06-17 | 北京无线电测量研究所 | High volume fraction silicon carbide particle reinforcement aluminum matrix composite material brazing method |
| CN105873707A (en) * | 2013-12-23 | 2016-08-17 | 哈里伯顿能源服务公司 | Thermally stable polycrystalline diamond with enhanced attachment joint |
| CN106862694A (en) * | 2017-04-06 | 2017-06-20 | 爱迪森自动化科技（昆山）有限公司 | A kind of method of functionally gradient material (FGM) method soldering stainless steel and hard alloy |
| CN107649758A (en) * | 2017-09-29 | 2018-02-02 | 哈尔滨工业大学 | A kind of method that soldering is carried out to porous silicon nitride ceramic and invar alloy using composite soldering |
| CN109622938A (en) * | 2018-12-12 | 2019-04-16 | 江苏阳明船舶装备制造技术有限公司 | It is a kind of to prepare copper alloy surface wear-resistant coating and preparation method with AgCuTi |
| CN109848607A (en) * | 2019-01-16 | 2019-06-07 | 阜阳佳派生产力促进中心有限公司 | A kind of preparation method of the brazing material welded for steel alloy and silicon carbide ceramics |
| CN110549032A (en) * | 2019-08-21 | 2019-12-10 | 河南机电职业学院 | copper-based brazing filler metal with gradient thermal expansion coefficient and preparation method thereof |
| CN117532198A (en) * | 2024-01-09 | 2024-02-09 | 河北省科学院能源研究所 | Ag-Cu-based active solder and production method and application thereof |
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|---|---|---|---|---|
| CN103042282A (en) * | 2012-12-24 | 2013-04-17 | 镇江大有硬质材料有限公司 | Method for brazing diamond drilling tools |
| CN103042282B (en) * | 2012-12-24 | 2015-04-15 | 镇江大有硬质材料有限公司 | Method for brazing diamond drilling tools |
| CN103358048A (en) * | 2013-07-25 | 2013-10-23 | 杭州华光焊接新材料股份有限公司 | Silver, copper and phosphorus system vacuum brazing filler |
| CN103358048B (en) * | 2013-07-25 | 2016-08-17 | 杭州华光焊接新材料股份有限公司 | A kind of silver-bearing copper phosphorus system vacuum brazing material |
| CN103467127A (en) * | 2013-09-05 | 2013-12-25 | 天津大学 | Brazed connection method of titanium alloy and silicon nitride ceramics |
| CN103752971A (en) * | 2013-12-13 | 2014-04-30 | 天津大学 | Method for connecting TC4 titanium alloy with silicon nitride ceramic by brazing connection with solders of titanium-silver-copper |
| CN105873707A (en) * | 2013-12-23 | 2016-08-17 | 哈里伯顿能源服务公司 | Thermally stable polycrystalline diamond with enhanced attachment joint |
| CN103759864A (en) * | 2014-01-26 | 2014-04-30 | 中国电子科技集团公司第四十九研究所 | Ceramic packaging structure and pressure sensitive apparatus shell of ceramic packaging structure |
| CN104475898A (en) * | 2014-12-26 | 2015-04-01 | 哈尔滨工业大学 | Dissimilar material brazing method of porous intermediate layer structure brazing seam |
| CN104475898B (en) * | 2014-12-26 | 2016-04-27 | 哈尔滨工业大学 | The foreign material method for welding of porous interlayer structure brazed seam |
| CN104708160A (en) * | 2015-01-30 | 2015-06-17 | 北京无线电测量研究所 | High volume fraction silicon carbide particle reinforcement aluminum matrix composite material brazing method |
| CN106862694A (en) * | 2017-04-06 | 2017-06-20 | 爱迪森自动化科技（昆山）有限公司 | A kind of method of functionally gradient material (FGM) method soldering stainless steel and hard alloy |
| CN106862694B (en) * | 2017-04-06 | 2019-05-24 | 哈尔滨工大华策科技有限公司 | A kind of method of the soldering of functionally gradient material (FGM) method stainless steel and hard alloy |
| CN107649758B (en) * | 2017-09-29 | 2019-08-02 | 哈尔滨工业大学 | A method of porous silicon nitride ceramic and invar alloy are brazed using composite soldering |
| CN107649758A (en) * | 2017-09-29 | 2018-02-02 | 哈尔滨工业大学 | A kind of method that soldering is carried out to porous silicon nitride ceramic and invar alloy using composite soldering |
| CN109622938A (en) * | 2018-12-12 | 2019-04-16 | 江苏阳明船舶装备制造技术有限公司 | It is a kind of to prepare copper alloy surface wear-resistant coating and preparation method with AgCuTi |
| CN109848607A (en) * | 2019-01-16 | 2019-06-07 | 阜阳佳派生产力促进中心有限公司 | A kind of preparation method of the brazing material welded for steel alloy and silicon carbide ceramics |
| CN109848607B (en) * | 2019-01-16 | 2020-11-27 | 阜阳佳派生产力促进中心有限公司 | Preparation method of brazing material for welding alloy steel and silicon carbide ceramic |
| CN110549032A (en) * | 2019-08-21 | 2019-12-10 | 河南机电职业学院 | copper-based brazing filler metal with gradient thermal expansion coefficient and preparation method thereof |
| CN110549032B (en) * | 2019-08-21 | 2021-06-29 | 河南机电职业学院 | Copper-based brazing filler metal with gradient thermal expansion coefficient and preparation method thereof |
| CN117532198A (en) * | 2024-01-09 | 2024-02-09 | 河北省科学院能源研究所 | Ag-Cu-based active solder and production method and application thereof |
| CN117532198B (en) * | 2024-01-09 | 2024-03-22 | 河北省科学院能源研究所 | Ag-Cu-based active solder and production method and application thereof |
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Application publication date: 20120926 |