CN208091193U - A kind of tungsten-cobalt alloy sintering furnace - Google Patents
A kind of tungsten-cobalt alloy sintering furnace Download PDFInfo
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- CN208091193U CN208091193U CN201820174612.6U CN201820174612U CN208091193U CN 208091193 U CN208091193 U CN 208091193U CN 201820174612 U CN201820174612 U CN 201820174612U CN 208091193 U CN208091193 U CN 208091193U
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Abstract
The utility model discloses a kind of tungsten-cobalt alloy sintering furnaces, including：It is made of shell, and the internal furnace body with hollow cavity；It is arranged in furnace interior, the workpiece cassette for accommodating tungsten-cobalt alloy；It is arranged in furnace interior, and is wrapped in the insulating layer of workpiece cassette periphery；It is arranged between workpiece cassette and insulating layer, and the resistive heating device being connect with insulating layer；It is arranged between workpiece cassette and shell, and the metallic plate being connect with insulating layer；The microwave heating equipment being connect with shell；The first temperature measuring equipment being arranged in workpiece cassette and the second temperature measuring equipment being arranged outside workpiece cassette.Tungsten-cobalt alloy sintering furnace disclosed by the utility model solves the problem of due to using energy consumption height, low output, quality caused by single resistance heating not good enough or to be difficult to industrialized production using in-furnace temperature unevenness caused by single microwave heating.
Description
Technical field
The utility model is related to stove equipment technical fields, more specifically, more particularly to a kind of tungsten-cobalt alloy sintering furnace.
Background technology
Tungsten-cobalt alloy is also known as tungsten-cobalt hard alloy, by cobalt content, can be divided into high cobalt (20%~30%), middle cobalt (10%~
15%) it can be manufactured by techniques such as usual special alloy dispensing, moldings with low cobalt (3%~8%) three classes, this metalloid alloy, only
There is firing that should be used control sintering atmosphere for vacuum or reducing atmosphere according to blank property and final product quality, generally in sintering furnace
It carries out.
Traditional sintering method is that graphite generates thermal energy as the heater of resistance-type in vacuum drying oven, makes compression moulding
Tungsten-cobalt hard alloy from outward appearance to inner essence heated under vacuum conditions, if heating is too fast, the tungsten-cobalt hard alloy of compression moulding holds
It is also easy to produce crackle and deformation, so the sintering process of general traditional tungsten-cobalt hard alloy is at 10 more than hour, although in this way
Solution tungsten-cobalt hard alloy is deformed in sintering process and crackle, but the crystal grain for also easily causing alloy simultaneously is grown up, serious shadow
The quality of product is rung, and it is larger to easily cause energy consumption.If i.e. resistance heating manner heat temperature raising is too fast, it be easy to cause tungsten-cobalt alloy
It cracks and modification, and if by the way of increasing and being sintered duration, and crystal grain can be caused to grow up and increase of consuming energy, cause to consume
Energy height, low output, quality are not good enough.
To solve the above-mentioned problems, the mode that microwave sintering may be used, it is conventional using the product ratio after microwave sintering
Product after resistance-type heat-agglomerating is more advantageous, and main performance is：Inoxidizability, the abrasion resistance and hardness of product are improved,
And shorten sintering time at more than half, energy-saving effect is apparent.
But in the manufacturing process of tungsten-cobalt hard alloy, dewaxing and sintering are its final stage in entirely manufacturing, and
A very crucial stage, it is desirable that dewaxing and sintering are completed higher than 100Pa in-furnace temperatures uniformly ± 5 DEG C, and it is micro-
Although wave sintering makes pressed tungsten-cobalt hard alloy not influenced on quality in the case of quick heating, microwave energy is true
Distribution is serious uneven in empty sintering furnace so that in-furnace temperature is uneven, is easy to influence the sintering quality of product, it is difficult to realize industry
Metaplasia is produced.
Therefore, it designs that a kind of in-furnace temperature is uniform, and energy-efficient tungsten-cobalt alloy sintering furnace, is those skilled in the art
Urgent problem to be solved.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of tungsten-cobalt alloy sintering furnace, is solved due to using single electricity
Energy consumption is larger caused by resistance heating or cracks and modification, or not using in-furnace temperature unevenness caused by single microwave heating
It can realize the needs of industrialized production.
A kind of tungsten-cobalt alloy sintering furnace, including：
It is made of shell, and the internal furnace body with hollow cavity；
It is arranged in the furnace interior, the workpiece cassette for accommodating tungsten-cobalt alloy；
It is arranged in the furnace interior, and is wrapped in the insulating layer of the workpiece cassette periphery；
It is arranged between the workpiece cassette and the insulating layer, and the resistive heating device being connect with the insulating layer；
It is arranged between the workpiece cassette and the shell, and the metallic plate being connect with the insulating layer；
It is connect with the shell, the microwave heating equipment for carrying out microwave heating to tungsten-cobalt alloy；
The first temperature measuring equipment being arranged in the workpiece cassette and the second temperature measuring equipment being arranged outside the workpiece cassette.
Preferably, the microwave heating equipment periphery is enclosed with the microwave device for preventing leakage being connect with the shell.
Preferably, the insulating layer is made of aluminium oxide.
Preferably, the resistive heating device is made of tungsten-rhenium alloy or molybdenum disilicide.
Preferably, the metallic plate is made of copper-steel composite board or copper coin.
Preferably, first temperature measuring equipment and second temperature measuring equipment are thermocouple.
Preferably, the microwave heating equipment by waveguide and magnetron pack at.
Preferably, the microwave heating equipment is made of at least two microwave heatable elements, and the adjacent microwave adds
There are angles between thermal element.
Preferably, further include the dewaxing pipe being connected to workpiece cassette inside, the dewaxing pipe is connected to dewaxing device, institute
Dewaxing device is stated with the control system to be connected.
Preferably, further include the vacuum tube being connected to the furnace interior, the vacuum tube is connected to vacuum plant, described
Vacuum plant is connected with the control system.
Tungsten-cobalt alloy sintering furnace provided by the utility model, by the way that resistive heating device and microwave is arranged simultaneously in furnace body
Heating device, and pass through the temperature in the first temperature measuring equipment and the real-time monitoring workpiece box of the second temperature measuring equipment and furnace body so that control
System processed can be according to real time temperature, the heating work duration of selective control resistive heating device and microwave heating equipment,
It solves the problems, such as since energy consumption caused by the single resistance heating of use is larger or cracks and modification, or uses single microwave
In-furnace temperature unevenness caused by heating influences the problem of sintering quality, meanwhile, by being arranged between workpiece cassette and shell, and with
The metallic plate of insulating layer connection, avoids, since cured steam regelation is on furnace wall, causing microwave that can not carry out tungsten-cobalt alloy
The problem of heating.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is the leftschematic diagram of the utility model embodiment tungsten-cobalt alloy sintering furnace；
Fig. 2 is the front schematic view of the utility model embodiment tungsten-cobalt alloy sintering furnace another embodiment.
Specific implementation mode
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.
Based on the embodiment in the application, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present application.
As depicted in figs. 1 and 2, a kind of tungsten-cobalt alloy sintering furnace provided by the utility model, including：
It is made of shell 1, and the internal furnace body 2 with hollow cavity；
It is arranged inside furnace body 2, the workpiece cassette 3 for accommodating tungsten-cobalt alloy；
It is arranged inside furnace body 2, and is wrapped in the insulating layer 4 of 3 periphery of workpiece cassette；
It is arranged between workpiece cassette 3 and insulating layer 4, and the resistive heating device 5 being connect with insulating layer 4；
It is arranged between workpiece cassette 3 and shell 1, and the metallic plate 6 being connect with insulating layer 4；
It is connect with shell 1, the microwave heating equipment 7 for carrying out microwave heating to tungsten-cobalt alloy；
The first temperature measuring equipment 8 being arranged in workpiece cassette 3 and the second temperature measuring equipment 9 being arranged outside workpiece cassette 3.
It should be noted that the present embodiment describes the sintering process of tungsten-cobalt alloy, it is to be based on tungsten-cobalt alloy
Carried out under the premise of compression moulding in preamble process, and the sintering process of tungsten-cobalt alloy be in vacuum sintering furnace into
Row, corresponding vacuum plant generally comprise sliding valve vacuum pump and Roots vaccum pump and vacuum degree measuring equipment, meanwhile, it is being sintered
When, it is also necessary to carry out dewaxing operation in conjunction with dewaxing device.Since embodiments herein is not improved above-mentioned apparatus, but still
It needs above-mentioned apparatus cooperation that could complete sintering circuit, final product is formed, so being illustrated herein.
With reference to the sintering process of tungsten-cobalt alloy, the course of work for carrying out the tungsten-cobalt alloy sintering furnace of the present embodiment is said
It is bright.
The tungsten-cobalt alloy of compression moulding is put into workpiece cassette 3 first, is then shut off furnace body 2, opens vacuum plant, it is sliding
Valve vacuum pump work starts Roots vaccum pump, while start-up resistor heating device 5, surely when furnace pressure reaches 2000Pa
When sky reaches 0.1Pa, starting microwave heating equipment 7, microwave heating equipment 7 and the fever of resistive heating device 5 at this time works at the same time,
When tungsten-cobalt alloy is largely deflated outward, when vacuum degree is less than 300Pa, close microwave heating equipment 7, resistive heating device 5 according to
The technique heating curve work set in advance.
In practical operation, tungsten-cobalt hard alloy will produce a large amount of gas in 600 DEG C of sintering processes below, production
Raw gas residue is very big on the influence of the quality of hard alloy, so just ceaselessly by vacuum plant during gas generates
It is discharged outside sintering furnace stove, the gas generated during this makes vacuum degree decline suddenly very much, is very easy to cause microwave heating
Device 7 is burnt out, so when vacuum degree is less than 300Pa, closes microwave heating equipment 7, and temperature in stove is maintained by resistive heating device 5
The stabilization of degree makes dewaxing process continue.
When vacuum degree rises to 300Pa or more in stove, open microwave heating equipment 7 work, continue to tungsten-cobalt alloy into
Row heating.
By being arranged between workpiece cassette 3 and shell 1, and connect with insulating layer 4 metallic plate 6, can be to avoid cured steam
Being condensate on furnace wall causes microwave energy to be largely lost, cause microwave can not to tungsten-cobalt alloy carry out normal heating the case where.?
In practice, can the metallic plate 6 of a variety of different structures be set according to sintering furnace and the concrete outcome of insulating layer, for example,
Metallic plate 6 can as shown in Figure 1 as insulating layer 4 interlayer, the periphery of insulating layer 4 can also be directly wrapped in as shown in Figure 2,
Its quantity may be one layer, or multilayer is not repeated herein.
During dewaxing, in order to which the exhaust gas evaporated to be completely exhausted out outside stove as far as possible, inert gas is due to pressure
Force difference is automatically into workpiece cassette 3, since the pressure of the inert gas outside workpiece cassette 3 is more than the vapour pressure in workpiece cassette 3, indifferent gas
For body automatically into workpiece cassette 3, the pernicious gas which prevent tungsten-cobalt alloys in sintering procedure runs pollution insulating layer 4 in stove
With furnace body 2.
After inert gas enters in stove, workpiece cassette 3 automatically opens, and is entered in workpiece cassette 3 with sharp inert gas, when this
After the completion of process, workpiece cassette 3 is automatically closed.
If it is desired to being quickly cooled down during this, press and be quickly cooled down switch, intake valve is opened, and the outer air of stove slowly enters stove
Interior, workpiece cassette 3 remains off at this time.
After 600 DEG C of dewaxings (dewaxing temperature is also the different sintering of binder because the ratio of tungsten-cobalt is different
Temperature has difference), 7 total power of microwave heating equipment input, certainly, the input power of microwave heating equipment 7 can also be according to
Prior program and period is put by ratio, and still, the power of resistive heating device 5 is according to the certain ratio of microwave input power
Example automatic running, it is necessary to assure the heated of tungsten-cobalt alloy is that presiding principle based on microwave heating, supplemented by resistance heating carries out,
Each output-input ratio ratio of two heating devices, can be in advance according to material composition difference, and technological requirement difference is configured,
It is not repeated herein.
When 8 feedback temperature of the first temperature measuring equipment reaches scheduled sintering temperature, control microwave heating equipment 7 turns off, and
After 9 feedback temperature of the second temperature measuring equipment reaches scheduled temperature, resistive heating device 5 is turned off.
When the maximum temperature that the first temperature measuring equipment 8 or the second temperature measuring equipment 9 are fed back is at 100 DEG C or so, you can open and burn
Freezing of a furnace takes out the tungsten-cobalt alloy baked.
It should be noted that in practice, it may be used and be connected with resistive heating device 5 and microwave heating equipment 7
Control system, control system is also connected with the first temperature measuring equipment 8 and the second temperature measuring equipment 9, and control system is according to the first thermometric
The temperature value that device 8 and the second temperature measuring equipment 9 are fed back is realized according to preset rules to resistive heating device 5 and microwave heating
Device 7 be turned on and off automatically control, improve tungsten-cobalt alloy sintering furnace the degree of automation.
It is of course also possible to not use control system, manually the first temperature measuring equipment 8 and the second temperature measuring equipment 9 are monitored,
And according to monitoring result, manually operated resistive heating device 5 and microwave heating equipment 7 are turned on and off.
Tungsten-cobalt alloy sintering furnace provided in this embodiment, by the way that resistive heating device 5 and microwave is arranged simultaneously in furnace body
Heating device 7, and by the temperature in the first temperature measuring equipment 8 and 9 real-time monitoring workpiece box 3 of the second temperature measuring equipment and furnace body 2, make
Obtaining control system can be according to real time temperature, the heating work of selective control resistive heating device 5 and microwave heating equipment 7
Duration is solved the problems, such as since energy consumption caused by the single resistance heating of use is larger or cracks and modification, or using single
In-furnace temperature unevenness caused by one microwave heating influences the problem of sintering quality, meanwhile, by the way that the gold inside insulating layer 4 is arranged
Belong to plate 6, avoids, due to condensing the problem of molding wax absorbs microwave, causes microwave that can not heat tungsten-cobalt alloy, realizing
In-furnace temperature is uniform, and energy-efficient effect.
In the another embodiment of the present embodiment, 7 periphery of microwave heating equipment is enclosed with the microwave being connect with shell 1
Device for preventing leakage 12, by that in 7 periphery package microwave device for preventing leakage 12 of microwave heating equipment, microwave heating can avoided to fill
The microwave for setting 7 generations leaks caused energy loss, is also avoided that environment caused by leaking influences.
In the another embodiment of the present embodiment, insulating layer 4 is made of aluminium oxide.
The insulating layer 4 of traditional tungsten-cobalt hard alloy vacuum sintering furnace was quickly cooled down using the material of carbonaceous in high temperature
Cheng Zhong equally fears to aoxidize, and oxidation aluminium material is changed to now, as thermal insulation material, because of aluminium oxide inherently oxide, institute
It is aoxidized with not being afraid of at high temperature, need not there is the protection of inert gas when being quickly cooled down.
In the another embodiment of the present embodiment, resistive heating device 5 is made of tungsten-rhenium alloy or molybdenum disilicide.
Because tungsten-cobalt hard alloy sintering temperature is at 1400 DEG C or so, graphite can absorb microwave and in the condition of high temperature easily quilt
Air oxidation can only be quickly cooled down by inert gas using the vacuum drying oven of graphite resistance heating device 5, be increased in this way
Production cost.And molybdenum disilicide is not easy to be oxidized by oxygen due to material properties itself, is opened on sintering furnace during being quickly cooled down
Air valve heater is similarly made using tungsten-rhenium alloy, operating temperature is not afraid of oxidation at 2000 DEG C or more, and
Resistivity is relatively high, and materials are fewer.
In the another embodiment of the present embodiment, metallic plate 6 is made of copper-steel composite board or copper coin, is overcome
Traditional stainless steel is to the disadvantage of microwave reflection difference, while crushing resistance in the stove without reducing original conventional vacuum sintering furnace again, again
Non-ferrous metal copper largely has been saved, since copper is 40 times or more of stainless steel microwave reflection rate, has improved the utilization rate of microwave,
Save mass energy.
In the another embodiment of the present embodiment, the first temperature measuring equipment 8 and the second temperature measuring equipment 9 are thermocouple, heat
Galvanic couple is common temperature element in temperature measuring instrument, its direct measuring temperature, and temperature signal is converted into thermo-electromotive force
Signal is converted into the temperature of measured medium by electric meter (secondary meter).
In the another embodiment of the present embodiment, microwave heating equipment 7 is made of waveguide 71 and magnetron 72,
In practical operation, magnetron 72 is directly connected to waveguide 71, can be carried out according to actual needs respectively with the connection type of furnace body 2
Kind selection, for example, through-hole can be opened up on furnace shell, waveguide 71 enters through through-hole in furnace body 2, and magnetron 72 generates microwave
Power, the microwave power that waveguide 71 generates magnetron 72 is to 2 inner cavity of furnace body, to heat tungsten-cobalt alloy.
In the another embodiment of the present embodiment, as shown in Fig. 2, microwave heating equipment 7 is added by least two microwaves
Thermal element 73 forms, and there are angles between adjacent microwave heatable element 73.
Using multiple microwave heatable elements 73, the microwave power in the unit interval can be reinforced, while microwave heating is first
Part 73 is arranged to the mode for having adjacent angle, i.e., not parallel each other, and due to the generally pylindrical structure of sintering furnace, makes
Each corner in furnace body 2 can preferably be covered by obtaining microwave.
Further include being connected to 3 inside of workpiece cassette to realize dewaxing process in the another embodiment of the present embodiment
Dewaxing pipe 10, dewaxing pipe 10 be connected to dewaxing device, dewaxing device is connected with control system.
Further include being connected to 2 inside of furnace body to realize vacuum drawn in the another embodiment of the present embodiment
Vacuum tube 11, vacuum tube 11 are connected to vacuum plant, and vacuum plant is connected with control system.
A kind of tungsten-cobalt alloy sintering furnace provided by the utility model is described in detail above.It is used herein
Specific case is expounded the principles of the present invention and embodiment, and the explanation of above example is only intended to help to manage
Solve the method and its core concept of the utility model.It should be pointed out that for those skilled in the art, not
Under the premise of being detached from the utility model principle, several improvements and modifications can be made to this utility model, these improve and repair
Decorations are also fallen into the protection domain of the utility model claims.
Claims (10)
1. a kind of tungsten-cobalt alloy sintering furnace, which is characterized in that including：
It is made of shell, and the internal furnace body with hollow cavity；
It is arranged in the furnace interior, the workpiece cassette for accommodating tungsten-cobalt alloy；
It is arranged in the furnace interior, and is wrapped in the insulating layer of the workpiece cassette periphery；
It is arranged between the workpiece cassette and the insulating layer, and the resistive heating device being connect with the insulating layer；
It is arranged between the workpiece cassette and the shell, and the metallic plate being connect with the insulating layer；
It is connect with the shell, the microwave heating equipment for carrying out microwave heating to tungsten-cobalt alloy；
The first temperature measuring equipment being arranged in the workpiece cassette and the second temperature measuring equipment being arranged outside the workpiece cassette.
2. tungsten-cobalt alloy sintering furnace according to claim 1, which is characterized in that the microwave heating equipment periphery is enclosed with
The microwave device for preventing leakage being connect with the shell.
3. tungsten-cobalt alloy sintering furnace according to claim 1, which is characterized in that the insulating layer is made of aluminium oxide.
4. tungsten-cobalt alloy sintering furnace according to claim 1, which is characterized in that the resistive heating device is by tungsten-rhenium alloy
Or molybdenum disilicide is constituted.
5. tungsten-cobalt alloy sintering furnace according to claim 1, which is characterized in that the metallic plate by copper-steel composite board or
Person's copper coin is constituted.
6. tungsten-cobalt alloy sintering furnace according to claim 1, which is characterized in that first temperature measuring equipment and described second
Temperature measuring equipment is thermocouple.
7. tungsten-cobalt alloy sintering furnace according to claim 1, which is characterized in that the microwave heating equipment by waveguide and
Magnetron pack at.
8. tungsten-cobalt alloy sintering furnace according to claim 1, which is characterized in that the microwave heating equipment is by least two
Microwave heatable element forms, and there are angles between the adjacent microwave heatable element.
9. tungsten-cobalt alloy sintering furnace according to claim 1, which is characterized in that further include and be connected to inside the workpiece cassette
Dewaxing pipe, dewaxing pipe is connected to dewaxing device, and the dewaxing device is connected with control system.
10. tungsten-cobalt alloy sintering furnace according to claim 1, which is characterized in that further include being connected to the furnace interior
Vacuum tube, the vacuum tube is connected to vacuum plant, and the vacuum plant is connected with control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820174612.6U CN208091193U (en) | 2018-01-31 | 2018-01-31 | A kind of tungsten-cobalt alloy sintering furnace |
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| CN201820174612.6U CN208091193U (en) | 2018-01-31 | 2018-01-31 | A kind of tungsten-cobalt alloy sintering furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173977A (en) * | 2019-06-27 | 2019-08-27 | 沈阳真空技术研究所有限公司 | A kind of high-purity metal chromium vacuum outgas sintering furnace |
| CN111637739A (en) * | 2020-04-30 | 2020-09-08 | 株洲惟才微波科技有限公司 | Vacuum dewaxing sintering furnace |
| CN113465394A (en) * | 2021-05-27 | 2021-10-01 | 中国工程物理研究院材料研究所 | Multi-field coupling microwave sintering device and control method thereof |
| CN115365500A (en) * | 2022-08-04 | 2022-11-22 | 株洲瑞德尔智能装备有限公司 | Wax pipe feeding device capable of solving reverse carburization of product |
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2018
- 2018-01-31 CN CN201820174612.6U patent/CN208091193U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173977A (en) * | 2019-06-27 | 2019-08-27 | 沈阳真空技术研究所有限公司 | A kind of high-purity metal chromium vacuum outgas sintering furnace |
| CN111637739A (en) * | 2020-04-30 | 2020-09-08 | 株洲惟才微波科技有限公司 | Vacuum dewaxing sintering furnace |
| CN113465394A (en) * | 2021-05-27 | 2021-10-01 | 中国工程物理研究院材料研究所 | Multi-field coupling microwave sintering device and control method thereof |
| CN115365500A (en) * | 2022-08-04 | 2022-11-22 | 株洲瑞德尔智能装备有限公司 | Wax pipe feeding device capable of solving reverse carburization of product |
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