CN105269178A - Solder and production method thereof - Google Patents
Solder and production method thereof Download PDFInfo
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- CN105269178A CN105269178A CN201510869621.8A CN201510869621A CN105269178A CN 105269178 A CN105269178 A CN 105269178A CN 201510869621 A CN201510869621 A CN 201510869621A CN 105269178 A CN105269178 A CN 105269178A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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Abstract
The invention provides solder and a production method thereof. The solder is composed of, by mass, 0.1%-5% of boron, 95%-98.8% of molybdenum and 0%-3% of carbon. According to the solder, a small amount of boron or the mixture of boron and carbon is added into high-temperature molybdenum alloy solder, so the solder is low in price and simple in manufacturing technology. Binary or ternary eutectic alloy solder is formed after the solder is subject to ball milling, so the working requirements of magnetron cathode components can be completely satisfied.
Description
Technical field
The present invention relates to welding technology field, in particular to the production method of a kind of solder and this solder.
Background technology
Magnetron is the radio tube producing microwave, because magnetron has the features such as oscillation efficiency is high, microwave output power is large, is widely used in the microwave source of the equipment such as household microwave oven, industrial microwave oven.The cathode assembly be made up of thorium tungsten alloy filament and molybdenum support in magnetron is the electron source maintaining electronics persistent oscillation, and thorium tungsten alloy filament relies on external power source with the mode electron emission of directly-heated by molybdenum support.Thorium tungsten alloy filament and molybdenum all belong to refractory metal, and in magnetron the maximum operating temperature of thorium tungsten alloy filament more than 1800 DEG C.Therefore, suitable high-temperature solder must be selected just to guarantee, and good welds between thorium tungsten alloy filament and molybdenum support is to form a closed-loop path.
At present, generally adopt ruthenium molybdenum or ruthenium molybdenum nickel solder in magnetron industry, weld thorium tungsten alloy filament and molybdenum support by high frequency brazing, but in ruthenium molybdenum solder, the content of ruthenium is more than 40%, and ruthenium belongs to noble metal, price is high and fluctuation is large, and these unfavorable factors constrain the extensive use of ruthenium molybdenum solder.On the other hand, in the process of magnetron manufacture, production and use, the operating temperature of thorium tungsten alloy filament is more than 1800 DEG C, and in iron molybdenum nickel solder compositions the fusing point of iron and nickel all lower than 1600 DEG C, the trace of iron and nickel certainly will be caused to volatilize and reduce the vacuum of radio tube, affecting stability and the reliability of magnetron work.
Summary of the invention
In order to solve the problems of the technologies described above one of at least, one object of the present invention is to provide the solder of a kind of cheap, high stability and high reliability.
Another object of the present invention is to provide a kind of method of producing above-mentioned solder.
In view of this, the embodiment of first aspect present invention provides a kind of solder, and for welding magnetron, the mass percentage of the component comprised and each component is: boron: 0.1% ~ 5%; Molybdenum: 95% ~ 98.8%; Carbon: 0% ~ 3%.
Solder provided by the invention, in high temperature molybdenum alloy solder, add the mixture of a small amount of boron element or boron element and carbon, not only cheap, manufacturing process is simple, and two yuan or ternary eutectic solder is formed after ball milling, the job requirement of magnetron cathode assembly can be met completely.
Specifically, in prior art, ruthenium molybdenum or ruthenium molybdenum nickel solder is generally adopted to weld thorium tungsten alloy filament and molybdenum support by high frequency brazing in magnetron industry, ruthenium belongs to noble metal, and price is high and fluctuation is large, on the other hand, the operating temperature of thorium tungsten alloy filament is more than 1800 DEG C, and the fusing point of iron and nickel, all lower than 1600 DEG C, causes the trace of iron and nickel to volatilize and reduces the vacuum of radio tube in iron molybdenum nickel solder compositions, affect stability and the reliability of magnetron work; And the high temperature molybdenum alloy solder provided in the present invention, add the mixture of a small amount of boron or boron and carbon, form two yuan or ternary eutectic alloy by ball milling, the fusing point of this alloy is about 1950 ~ 2100 DEG C.In addition, carbon and boron molten, boiling point is high, saturated vapor forces down, not volatile.In addition, the comparision contents of carbon and boron is low, obviously can not increase the resistance of molybdenum, this guarantees stability and the reliability of solder; In addition, carbon and boron element cheap, easily obtain, also reduce the production cost of product to a certain extent.
In technique scheme, the particle diameter of molybdenum is 20 μm ~ 40 μm; The particle diameter of boron is 35 μm ~ 60 μm; The particle diameter of carbon is 30 μm ~ 55 μm.
In this technical scheme, the particle diameter of molybdenum, boron and carbon is all in a μm rank, in mechanical milling process, each component contacts is more abundant, therefore each component selecting particle diameter less carries out ball milling, just ensure that and form binary eutectic alloy or ternary eutectic alloy better between each component, and the fusing point of eutectic alloy is also higher, which enhances stability and the reliability of solder, thus substantially increase the competitiveness of product in market.
The embodiment of second aspect present invention provides a kind of production method of solder, comprising:
Blend step, forms mixture by the molybdenum of 95% ~ 98.8%, the boron of 0.1% ~ 5%, the carbon mixing of 0% ~ 3%, and pours in ball grinder;
Ball milling step, adds abrading-ball, and adds absolute ethyl alcohol in ball grinder, then ball milling 6 ~ 9 hours;
Baking step, after ball milling completes, takes out abrading-ball, and the powder in ball grinder is put into drying box oven dry 2 hours;
Forming step, makes weld-ring by the powder of drying.
The production method of solder provided by the invention, pours in ball grinder after the mixing of molybdenum, boron and carbon is formed mixture, is conducive to three kinds of elements and contacts all sidedly, carry out subsequent operation better to three kinds of elements; Carry out ball milling again, ball milling is to make molybdenum, boron and carbon three kinds of elements form binary eutectic alloy or ternary eutectic alloy.In addition, adding ethanol as grinding aid during ball milling, is occur too to stick even seam between element powders and ball, ball milling barrel to prevent; Then taken out by the powder after ball milling, dry, its operation is generally carry out in drying box, and also having and carry out in vacuum glove box, is all to reach the object making powder for drying; Finally, the powder sintered of drying is made weld-ring.
In addition, the production method of the solder in above-described embodiment provided by the invention can also have following additional technical feature:
In technique scheme, in ball milling step: the mass ratio of mixture and abrading-ball is 1:3.5 ~ 8.
In this technical scheme, because ratio of grinding media to material is larger, time required for ball milling is shorter, but high ratio of grinding media to material can make again powder programming rate accelerate, and makes powder be attached on the inwall of abrading-ball or ball grinder in a large number, therefore selects suitable ratio of grinding media to material can make mixture in mechanical milling process simultaneously, the collision of powder and ball is more even, after avoiding both to clash into generation heat, the situation that powder is bonded on abrading-ball occurs, and improves the utilization rate of element.
In above-mentioned arbitrary technical scheme, the solid-liquid mass ratio of mixture and absolute ethyl alcohol is 3:1.
In this technical scheme, absolute ethyl alcohol is as grinding aid, occur too to stick even seam between element powders and ball, ball milling barrel to prevent, but add excessive absolute ethyl alcohol, can hinder again the relative motion between abrading-ball and powder, reduce its operating efficiency, therefore the solid-liquid mass ratio of mixture and absolute ethyl alcohol is set to 3:1, ensure that the effect of absolute ethyl alcohol, also enable the motion between abrading-ball and powder carry out smoothly simultaneously.
In above-mentioned arbitrary technical scheme, described abrading-ball is agate ball.
In this technical scheme, conventional abrading-ball is generally two kinds, has steel ball and agate ball, in use, some media react and get rusty steel ball easily and in ball grinder, and in steel ball and the element powders process of colliding, be easy to produce heat, cause powder to be bonded at the surface of steel ball; And selecting of agate ball, just avoid the generation of above-mentioned situation, substantially increase the utilization rate of element, meanwhile, also simplify follow-up work step.
In above-mentioned arbitrary technical scheme, described abrading-ball comprises the agate ball of multiple different-grain diameter.
In this technical scheme, the abrading-ball of same dimension is along certain non-orbiting scroll, be unfavorable for the refinement of powder grain, and select the agate ball of different-grain diameter, because the agate ball of Large stone has higher impact energy, the agate ball of small particle diameter then can produce more friction behavior, both inwall and bottoms getting final product random percussion grinder spherical tank used in combination, easy generation shearing force, be conducive to powder to strip down from abrading-ball tank and abrading-ball, substantially increase the utilization rate of element, avoid the waste of powder.
In above-mentioned arbitrary technical scheme, in baking step, the bake out temperature of drying baker is 60 DEG C.
In this technical scheme, if bake out temperature is too low, then powder can be made to reach time of drying requirement elongated, unnecessary consume be produced to baking oven, reduces production efficiency; If bake out temperature is too high, then likely makes element powders react in drying box, and the performance of element is changed, destroy the character of element itself, and its stability and reliability can not be ensured.Therefore, select bake out temperature to be 60 DEG C, ensure that element stable performance in drying course, save the time simultaneously, substantially increase production efficiency.
In above-mentioned arbitrary technical scheme, forming step comprises: static pressure step, in dried powder, add forming agent, and carries out static pressure formation blank; Sintering step, makes weld-ring by blank sintering furnace after sintering.
In this technical scheme, first static pressure is carried out to dried powder and form blank, add forming agent in its process, be conducive to the shaping of powder; Blank is put in sintering furnace again and carry out sintering weld-ring into, be to enable weld-ring reach density more accurately, thus strengthen its intensity.
In above-mentioned arbitrary technical scheme, in sintering step, the sintering time of blank is 60 minutes ~ 90 minutes.
In this technical scheme, sintering time is approximately 60 minutes ~ 90 minutes, ensure that the density of the rear weld-ring of sintering is enough accurate on the one hand; Avoid sintering time on the other hand long, react between element in powder and the situation of its performance change is occurred.
Additional aspect of the present invention and advantage become obvious by description part below, or are recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the flow chart of the preparation method of solder according to one embodiment of the invention;
Fig. 2 is the flow chart of the preparation method of described according to a further embodiment of the invention solder.
Detailed description of the invention
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
The solder that the embodiment of first aspect present invention provides, for welding magnetron, the mass percentage of the component comprised and each component is: boron: 0.1% ~ 5%; Molybdenum: 95% ~ 98.8%; Carbon: 0% ~ 3%.
Solder provided by the invention, in high temperature molybdenum alloy solder, add the mixture of a small amount of boron element or boron element and carbon, not only cheap, manufacturing process is simple, and two yuan or ternary eutectic solder is formed after ball milling, the job requirement of magnetron cathode assembly can be met completely.
In one embodiment of the invention, the particle diameter of molybdenum is 20 μm ~ 40 μm; The particle diameter of boron is 35 μm ~ 60 μm; The particle diameter of carbon is 30 μm ~ 55 μm.
In this embodiment, the particle diameter of molybdenum, boron and carbon is all in a μm rank, in mechanical milling process, each component contacts is more abundant, therefore each component selecting particle diameter less carries out ball milling, just ensure that and form binary eutectic alloy or ternary eutectic alloy better between each component, and the fusing point of eutectic alloy is also higher, which enhances stability and the reliability of solder, thus substantially increase the competitiveness of product in market.
As shown in Figure 1, the production method of the solder that the embodiment of second aspect present invention provides, comprises the following steps:
102, the molybdenum of 95% ~ 98.8%, the boron of 0.1% ~ 5%, the carbon mixing of 0% ~ 3% are formed mixture, and pour in ball grinder;
104, in ball grinder, add abrading-ball, and add absolute ethyl alcohol, then ball milling 6 ~ 9 hours;
106, after ball milling completes, take out abrading-ball, and the powder in ball grinder is put into drying box oven dry 2 hours;
108, the powder of drying is made weld-ring.
The production method of solder provided by the invention, pours in ball grinder after the mixing of molybdenum, boron and carbon is formed mixture, is conducive to three kinds of elements and contacts all sidedly, carry out subsequent operation better to three kinds of elements; Carry out ball milling again, ball milling is to make molybdenum, boron and carbon three kinds of elements form binary eutectic alloy or ternary eutectic alloy.In addition, adding ethanol as grinding aid during ball milling, is occur too to stick even seam between element powders and ball, ball milling barrel to prevent; Then taken out by the powder after ball milling, dry, its operation is generally carry out in drying box, and also having and carry out in vacuum glove box, is all to reach the object making powder for drying; Finally, the powder sintered of drying is made weld-ring.
In one embodiment of the invention, at step 104, the mass ratio of mixture and abrading-ball is 1:3.5 ~ 8.
In this embodiment, because ratio of grinding media to material is larger, time required for ball milling is shorter, but high ratio of grinding media to material can make again powder programming rate accelerate, and makes powder be attached on the inwall of abrading-ball or ball grinder in a large number, therefore selects suitable ratio of grinding media to material can make mixture in mechanical milling process simultaneously, the collision of powder and ball is more even, after avoiding both to clash into generation heat, the situation that powder is bonded on abrading-ball occurs, and improves the utilization rate of element.
In one embodiment of the invention, at step 104, the solid-liquid mass ratio of mixture and absolute ethyl alcohol is 3:1.
In this embodiment, absolute ethyl alcohol is as grinding aid, occur too to stick even seam between element powders and ball, ball milling barrel to prevent, but add excessive absolute ethyl alcohol, can hinder again the relative motion between abrading-ball and powder, reduce its operating efficiency, therefore the solid-liquid mass ratio of mixture and absolute ethyl alcohol is set to 3:1, ensure that the effect of absolute ethyl alcohol, also enable the motion between abrading-ball and powder carry out smoothly simultaneously.
In one embodiment of the invention, abrading-ball is agate ball.
In this embodiment, conventional abrading-ball is generally two kinds, has steel ball and agate ball, in use, some media react and get rusty steel ball easily and in ball grinder, and in steel ball and the element powders process of colliding, be easy to produce heat, cause powder to be bonded at the surface of steel ball; And selecting of agate ball, just avoid the generation of above-mentioned situation, substantially increase the utilization rate of element, meanwhile, also simplify follow-up work step.
In one embodiment of the invention, abrading-ball comprises the agate ball of multiple different-grain diameter.
In this embodiment, the abrading-ball of same dimension is along certain non-orbiting scroll, be unfavorable for the refinement of powder grain, and select the agate ball of different-grain diameter, because the agate ball of Large stone has higher impact energy, the agate ball of small particle diameter then can produce more friction behavior, both inwall and bottoms getting final product random percussion grinder spherical tank used in combination, easy generation shearing force, be conducive to powder to strip down from abrading-ball tank and abrading-ball, substantially increase the utilization rate of element, avoid the waste of powder.
In one embodiment of the invention, in step 106, the bake out temperature of drying baker is 60 DEG C.
In this embodiment, if bake out temperature is too low, then powder can be made to reach time of drying requirement elongated, unnecessary consume be produced to baking oven, reduces production efficiency; If bake out temperature is too high, then likely makes element powders react in drying box, and the performance of element is changed, destroy the character of element itself, and its stability and reliability can not be ensured.Therefore, select bake out temperature to be 60 DEG C, ensure that element stable performance in drying course, save the time simultaneously, substantially increase production efficiency.
In one embodiment of the invention, as shown in Figure 2, step 108 comprises:
Step 1081, adds forming agent in dried powder, and carries out static pressure formation blank;
Step 1082, makes weld-ring by blank sintering furnace after sintering.
In this embodiment, first static pressure is carried out to dried powder and form blank, add forming agent in its process, be conducive to the shaping of powder; Blank is put in sintering furnace again and carry out sintering weld-ring into, be to enable weld-ring reach density more accurately, thus strengthen its intensity.
In one embodiment of the invention, in step 1082, the sintering time of blank is 60 minutes ~ 90 minutes.
In this embodiment, sintering time is approximately 60 minutes ~ 90 minutes, ensure that the density of the rear weld-ring of sintering is enough accurate on the one hand; Avoid sintering time on the other hand long, react between element in powder and the situation of its performance change is occurred.
Below in conjunction with some specific embodiments, solder and production method thereof are described.
Embodiment one:
According to the mass content of molybdenum powder and boron powder than being 96.5%:3.5%, weighing molybdenum powder and boron powder and pouring in ball grinder.Add the different agate ball of diameter according to the ratio of ratio of grinding media to material 4:1, add absolute ethyl alcohol ball milling 6 hours according to the ratio of solid-to-liquid ratio 3:1.After ball milling terminates, take out agate ball, residual powder is placed in dry 2 hours of the baking oven of 60 DEG C.Dried powder adds forming agent again, is blank by hydrostatic profile, in the hydrogen atmosphere sintering furnace of 1450 ~ 1500 DEG C, finally sinter the weld-ring becoming certain specification after 60 ~ 90 minutes.
In this embodiment, molybdenum powder mixes according to certain ratio with boron powder, forms binary alloy by ball milling, the fusing point of alloy is about 1950 ~ 2100 DEG C, in the process of magnetron manufacture, production and use, even if operating temperature is very high, the solder that this binary alloy is produced also can not melt; In addition, the saturated vapor pressure of boron element is very low, not volatile, and content is few, can not have an impact, thus enhance stability and the reliability of this high-temperature solder to the resistance of molybdenum.
Embodiment two:
Compare for 96.7%:2.5%:0.8% according to molybdenum powder, boron powder with the mass content of carbon dust, weigh boron powder, carbon dust and molybdenum powder and also pour in ball grinder.Add the different agate ball of diameter according to the ratio of ratio of grinding media to material 6:1, add absolute ethyl alcohol ball milling 9 hours according to the ratio of solid-to-liquid ratio 3:1.After ball milling terminates, take out agate ball, residual powder is placed in dry 2 hours of the baking oven of 60 DEG C.Dried powder adds forming agent again, is blank by hydrostatic profile, in the hydrogen atmosphere sintering furnace of 1450 ~ 1500 DEG C, finally sinter the weld-ring becoming certain specification after 60 ~ 90 minutes.
Embodiment three:
Compare for 97.5%:2.0%:0.5% according to molybdenum powder, boron powder with the mass content of carbon dust, weigh boron powder, carbon dust and molybdenum powder and also pour in ball grinder.Add the different agate ball of diameter according to the ratio of ratio of grinding media to material 6:1, add absolute ethyl alcohol ball milling 9 hours according to the ratio of solid-to-liquid ratio 3:1.After ball milling terminates, take out agate ball, residual powder is placed in dry 2 hours of the baking oven of 60 DEG C.Dried powder adds forming agent again, is blank by hydrostatic profile, in the hydrogen atmosphere sintering furnace of 1450 ~ 1500 DEG C, finally sinter the weld-ring becoming certain specification after 60 ~ 90 minutes.
In above two embodiments, molybdenum powder, carbon dust mix according to certain ratio with boron powder, ternary alloy three-partalloy is formed by ball milling, the fusing point of alloy is about 1950 ~ 2100 DEG C, in the process of magnetron manufacture, production and use, even if operating temperature is very high, the solder that this ternary alloy three-partalloy is produced also can not melt; In addition, the saturated vapor pressure of boron and carbon is very low, not volatile, and content is few, can not have an impact, thus enhance stability and the reliability of this high-temperature solder to the resistance of molybdenum.
In addition, also can, only containing molybdenum and carbon, specifically see as follows in solder:
Embodiment four:
According to the mass content of molybdenum powder and carbon dust than being 98.2%:1.8%, weighing carbon dust and molybdenum powder and pouring in ball grinder.Add the different agate ball of diameter according to the ratio of ratio of grinding media to material 5:1, add absolute ethyl alcohol ball milling 8 hours according to the ratio of solid-to-liquid ratio 3:1.After ball milling terminates, take out agate ball, residual powder is placed in dry 2 hours of the baking oven of 60 DEG C.Dried powder adds forming agent again, is blank by hydrostatic profile, in the hydrogen atmosphere sintering furnace of 1450 ~ 1500 DEG C, finally sinter the weld-ring becoming certain specification after 60 ~ 90 minutes.
In this embodiment, molybdenum powder mixes according to certain ratio with carbon dust, forms binary alloy by ball milling, the fusing point of alloy is about 1950 ~ 2100 DEG C, in the process of magnetron manufacture, production and use, even if operating temperature is very high, the solder that this binary alloy is produced also can not melt; In addition, the saturated vapor pressure of carbon is very low, not volatile, and content is few, can not have an impact, thus enhance stability and the reliability of this high-temperature solder to the resistance of molybdenum; Finally, carbon is cheap, is widely used, and thus reduces the production cost of product.
To sum up, solder provided by the invention, will in high temperature molybdenum alloy solder, add the mixture of a small amount of boron element or boron element and carbon, not only cheap, manufacturing process is simple, and two yuan or ternary eutectic solder is formed after ball milling, the job requirement of magnetron cathode assembly can be met completely.
Specifically, in prior art, ruthenium molybdenum or ruthenium molybdenum nickel solder is generally adopted to weld thorium tungsten alloy filament and molybdenum support by high frequency brazing in magnetron industry, ruthenium belongs to noble metal, and price is high and fluctuation is large, on the other hand, the operating temperature of thorium tungsten alloy filament is more than 1800 DEG C, and the fusing point of iron and nickel, all lower than 1600 DEG C, certainly will cause the trace of iron and nickel to volatilize and reduce the vacuum of radio tube in iron molybdenum nickel solder compositions, affect stability and the reliability of magnetron work; And the high temperature molybdenum alloy solder provided in the present invention, add the mixture of a small amount of boron or boron and carbon, form two yuan or ternary eutectic alloy by ball milling, the fusing point of this alloy is about 1950 ~ 2100 DEG C.In addition, carbon and boron molten, boiling point is high, saturated vapor forces down, not volatile.In addition, the comparision contents of carbon and boron is low, obviously can not increase the resistance of molybdenum, this guarantees stability and the reliability of solder; In addition, carbon and boron element cheap, easily obtain, also reduce the production cost of product to a certain extent.
In the description of this description, specific features, structure, material or feature that the description of term " embodiment ", " some embodiments ", " specific embodiment " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a solder, for welding magnetron, is characterized in that, the mass percentage of the component comprised and each component is:
Boron: 0.1% ~ 5%;
Molybdenum: 95% ~ 98.8%;
Carbon: 0% ~ 3%.
2. solder according to claim 1, is characterized in that,
The particle diameter of molybdenum is 20 μm ~ 40 μm;
The particle diameter of boron is 35 μm ~ 60 μm;
The particle diameter of carbon is 30 μm ~ 55 μm.
3. a production method for solder, is characterized in that, comprising:
Blend step, forms mixture by the molybdenum of 95% ~ 98.8%, the boron of 0.1% ~ 5%, the carbon mixing of 0% ~ 3%, and pours in ball grinder;
Ball milling step, adds abrading-ball, and adds absolute ethyl alcohol in ball grinder, then ball milling 6 ~ 9 hours;
Baking step, after ball milling completes, takes out abrading-ball, and the powder in ball grinder is put into drying box oven dry 2 hours;
Forming step, makes weld-ring by the powder of drying.
4. the production method of solder according to claim 3, is characterized in that, in ball milling step:
The mass ratio of mixture and abrading-ball is 1:3.5 ~ 8.
5. the production method of solder according to claim 3, is characterized in that, in ball milling step:
The solid-liquid mass ratio of mixture and absolute ethyl alcohol is 3:1.
6. the production method of solder according to claim 3, is characterized in that,
Described abrading-ball is agate ball.
7. the production method of solder according to claim 6, is characterized in that,
Described abrading-ball comprises the agate ball of multiple different-grain diameter.
8. the production method of solder according to claim 3, is characterized in that, in baking step,
The bake out temperature of drying baker is 60 DEG C.
9. the production method of solder according to claim 3, is characterized in that, forming step comprises: static pressure step, in dried powder, add forming agent, and carries out static pressure formation blank;
Sintering step, makes weld-ring by blank sintering furnace after sintering.
10. the production method of solder according to claim 9, is characterized in that, in sintering step, the sintering time of blank is 60 minutes ~ 90 minutes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624471A (en) * | 2016-12-29 | 2017-05-10 | 广东威特真空电子制造有限公司 | Mo-Ru welding flux, preparation method thereof, and magnetron |
| CN113579449A (en) * | 2021-07-08 | 2021-11-02 | 厦门虹鹭钨钼工业有限公司 | Solder for magnetron cathode assembly and preparation method thereof |
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| CN103921012A (en) * | 2014-04-04 | 2014-07-16 | 安徽华东光电技术研究所 | Preparation method of tungsten-cobalt solder for cathode, preparation method of brazed assembly and application of brazed assembly |
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| CN101568402A (en) * | 2007-10-31 | 2009-10-28 | 东芝北斗电子株式会社 | Soldering material, lamp bulb, magnetron and soldering method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624471A (en) * | 2016-12-29 | 2017-05-10 | 广东威特真空电子制造有限公司 | Mo-Ru welding flux, preparation method thereof, and magnetron |
| CN106624471B (en) * | 2016-12-29 | 2021-10-15 | 广东威特真空电子制造有限公司 | Mo-Ru solder, preparation method thereof and magnetron |
| CN113579449A (en) * | 2021-07-08 | 2021-11-02 | 厦门虹鹭钨钼工业有限公司 | Solder for magnetron cathode assembly and preparation method thereof |
| CN113579449B (en) * | 2021-07-08 | 2022-12-16 | 厦门虹鹭钨钼工业有限公司 | Solder for magnetron cathode assembly and preparation method thereof |
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