CN103667673B - A kind of cooling treatment method of amorphous powder core - Google Patents
A kind of cooling treatment method of amorphous powder core Download PDFInfo
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- CN103667673B CN103667673B CN201310649085.1A CN201310649085A CN103667673B CN 103667673 B CN103667673 B CN 103667673B CN 201310649085 A CN201310649085 A CN 201310649085A CN 103667673 B CN103667673 B CN 103667673B
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Abstract
The present invention relates to the processing method of a kind of amorphous powder core, be specifically related to the cooling treatment method of a kind of amorphous powder core；It comprises the steps step one, by amorphous powder core through the metal bar being fixed in water-cooled but stove, closes the fire door of water-cooled but stove, and the length direction of described metal bar is parallel with the length direction of water-cooled but stove；Step 2, around coast of paint envelope curve on the outer wall of water-cooled but stove, opens DC source, makes to produce in water-cooled but stove magnetic field, and magnetic induction line passes perpendicularly through the circumferentia of powder core；Step 3, after powder core is cooled to room temperature, closes DC source, takes out powder core；It can adapt to bigger powder core pressed density scope, it is possible to effectively eliminates due to powder passivation, the uneven impact that the electric property of amorphous powder core is caused of insulating.
Description
Technical field
The present invention relates to the processing method of a kind of amorphous powder core, be specifically related to the cooling treatment method of a kind of amorphous powder core.
Background technology
Amorphous powder core is to process through a series of links such as the insulation of powder, passivation, compacting, heat treatment, cooling procedures, the magnetic property required for reaching us, heat treatment and cooling link especially important in whole process.
Tradition powder core cooling procedure after heat treatment is that directly cooling or use water-cooling system make powder core be cooled to room temperature by heat treatment temperature in atmosphere, but the performance of amorphous powder core can be produced certain impact by such type of cooling.Amorphous powder core arises that the uneven of stirring affects the performance of the product sintered out in insulation, passivating process simultaneously, pressed density does not reach standard also can affect the performance of product, therefore the post-processing approach that research is suitable is needed badly, eliminate insulation, adverse effect that powder core performance is brought by passivation, pressing process, improve the performance of powder core, reduce the wasting of resources.
Summary of the invention
For solving the problems referred to above, it is an object of the invention to provide the cooling treatment method of a kind of amorphous powder core, bigger powder core pressed density scope can be adapted to, it is possible to effectively eliminate due to powder passivation, the uneven impact that the electric property of amorphous powder core is caused of insulating.
The technical scheme is that the cooling treatment method of a kind of amorphous powder core, comprise the steps
Step one, by amorphous powder core through the metal bar being fixed in water-cooled but stove, closes the fire door of water-cooled but stove, and the length direction of described metal bar is parallel with the length direction of water-cooled but stove；
Step 2, around coast of paint envelope curve on the outer wall of water-cooled but stove, opens DC source, makes to produce in water-cooled but stove magnetic field, and magnetic induction line passes perpendicularly through the circumferentia of powder core；
Step 3, after powder core is cooled to room temperature, closes DC source, takes out powder core.
Optimizing, the enamel-covered wire on water-cooled but furnace outer wall is twist.
Optimizing, in step 2, the magnetic flux density in water-cooled but stove is 10000-3000GS.
Optimizing, in step 2, the magnetic flux density in water-cooled but stove is 2000GS.
Optimizing, DC source described in step 2 is 20-50A.
Optimizing, DC source described in step 2 is 30A.
Optimizing, described metal bar adopts copper rod.
The beneficial effects of the present invention is: 1, amorphous powder core adds horizontal magnetic treatment in cooling procedure, this kind of processing mode can make amorphous powder core need not have significantly high pressed density, can effectively improve the impact on its performance that in the passivation of amorphous powder core, insulation process, stirring inequality is brought simultaneously；2, by arranging suitable magnetic flux density and DC source, bigger powder core pressed density scope can be adapted to, can effectively eliminate due to powder passivation, the uneven impact that the electric property of amorphous powder core is caused of insulating, make the loss reduction of powder core, pcrmeability raise；3, method provided by the invention improves the performance of powder core, has saved resource；4, adopting spiral type enamel-covered wire and copper rod, material is easy to get, simple for production.
Detailed description of the invention
The present invention is illustrated below in conjunction with embodiment.
Sequentially pass through amorphous band pulverizing, powder sieving, powder mixture ratio, powdered insulation, passivation, compacting, heat treatment prepare amorphous powder core.The circumferentia diameter of amorphous powder core is 33mm, is highly 6mm.Owing to normal pressed density is 5.7Kg/mm3, therefore for the effect of checking the inventive method, choosing the density after 6 compactings in the powder core of same batch produced according to the method described above is 5.5Kg/mm3Powder core and 6 compacting after density be 5.9Kg/mm3Powder core test as follows.
Embodiment 1
Choosing the density after 3 compactings is 5.5Kg/mm3Powder core (being numbered sample 1-3), by the following method amorphous powder core is carried out cooling process, the steps include:
Step one, by amorphous powder core through the metal bar being fixed in water-cooled but stove, closes the fire door of water-cooled but stove, and the length direction of described metal bar is parallel with the length direction of water-cooled but stove；
Step 2, around coast of paint envelope curve on the outer wall of water-cooled but stove, opens DC source, makes to produce in water-cooled but stove magnetic field, and magnetic induction line passes perpendicularly through the circumferentia of powder core；
Step 3, after powder core is cooled to room temperature, closes DC source, takes out powder core.
Wherein, the enamel-covered wire on water-cooled but furnace outer wall is twist.
Wherein, in step 2, the magnetic flux density in water-cooled but stove is 2000GS.
Wherein, DC source described in step 2 is 30A.
Wherein, described metal bar adopts copper rod.
Comparative example 1
Choosing the density after 3 compactings is 5.5Kg/mm3Powder core (being numbered sample 4-6), in water-cooled but stove, carry out cooling process, be not added with magnetic field.
Embodiment 2
Choosing the density after 3 compactings is 5.9Kg/mm3Powder core (being numbered sample 7-9), by the following method amorphous powder core is carried out cooling process, the steps include:
Step one, by amorphous powder core through the metal bar being fixed in water-cooled but stove, closes the fire door of water-cooled but stove, and the length direction of described metal bar is parallel with the length direction of water-cooled but stove；
Step 2, around coast of paint envelope curve on the outer wall of water-cooled but stove, opens DC source, makes to produce in water-cooled but stove magnetic field, and magnetic induction line passes perpendicularly through the circumferentia of powder core；
Step 3, after powder core is cooled to room temperature, closes DC source, takes out powder core.
Wherein, the enamel-covered wire on water-cooled but furnace outer wall is twist.
Wherein, in step 2, the magnetic flux density in water-cooled but stove is 2000GS.
Wherein, DC source described in step 2 is 30A.
Wherein, described metal bar adopts copper rod.
Comparative example 2
Choosing the density after 3 compactings is 5.9Kg/mm3Powder core (being numbered sample 10-12), in water-cooled but stove, carry out cooling process, be not added with magnetic field.
Each sample is tested, and it is as shown in the table for result.
Table 1
Contrasted from upper table: the powder core no matter being less than normal pressed density is also above the powder core of normal pressed density, after adopting method provided by the invention to cool down, pcrmeability is higher, loss is relatively low, namely magnetic property is better, and therefore the method for the present invention is better than comparative example.
Present invention is characterized in that 1, amorphous powder core adds horizontal magnetic treatment in cooling procedure, this kind of processing mode can make amorphous powder core need not have significantly high pressed density, can effectively improve the impact on its performance that in the passivation of amorphous powder core, insulation process, stirring inequality is brought simultaneously；2, by arranging suitable magnetic flux density and DC source so that it is can adapt to bigger powder core pressed density scope (5.5Kg/mm3-5.9Kg/mm3), it is possible to effectively eliminate due to powder passivation, the uneven impact that the electric property of amorphous powder core is caused of insulating, make the loss reduction of powder core, pcrmeability raise；3, method provided by the invention improves the performance of powder core, has saved resource；4, adopting spiral type enamel-covered wire and copper rod, material is easy to get, simple for production.
Claims (4)
1. the cooling treatment method of an amorphous powder core, it is characterised in that: comprise the steps
Step one, by amorphous powder core through the metal bar being fixed in water-cooled but stove, closes the fire door of water-cooled but stove, and the length direction of described metal bar is parallel with the length direction of water-cooled but stove；
Step 2, around coast of paint envelope curve on the outer wall of water-cooled but stove, opens DC source, makes to produce in water-cooled but stove magnetic field, and magnetic induction line passes perpendicularly through the circumferentia of powder core；
Step 3, after powder core is cooled to room temperature, closes DC source, takes out powder core；
In step 2, the magnetic flux density in water-cooled but stove is 2000GS；
DC source described in step 2 is 20-50A；
The density of described powder core is 5.5g/cm3Or 5.9g/cm3。
2. the cooling treatment method of amorphous powder core according to claim 1, it is characterised in that: the enamel-covered wire on water-cooled but furnace outer wall is twist.
3. the cooling treatment method of amorphous powder core according to claim 2, it is characterised in that: DC source described in step 2 is 30A.
4. the cooling treatment method of the amorphous powder core according to claim 1-3 any one, it is characterised in that: described metal bar adopts copper rod.
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| CN103667673B true CN103667673B (en) | 2016-07-06 |
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Citations (5)
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|---|---|---|---|---|
| JPS5754308A (en) * | 1980-08-11 | 1982-03-31 | Westinghouse Electric Corp | |
| JPS5840811A (en) * | 1981-08-18 | 1983-03-09 | Toshiba Corp | Annealing furnace for wound core |
| CN85100770A (en) * | 1985-04-01 | 1986-08-27 | 首钢特殊钢公司冶金研究所 | Novel constant magnetic core---1J34H |
| US4877464A (en) * | 1986-06-09 | 1989-10-31 | Allied-Signal Inc. | Rapid magnetic annealing of amorphous metal in molten tin |
| CN101226802A (en) * | 2007-11-16 | 2008-07-23 | 中国计量学院 | Soft magnetic powder core and production method thereof |
-
2013
- 2013-12-06 CN CN201310649085.1A patent/CN103667673B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5754308A (en) * | 1980-08-11 | 1982-03-31 | Westinghouse Electric Corp | |
| JPS5840811A (en) * | 1981-08-18 | 1983-03-09 | Toshiba Corp | Annealing furnace for wound core |
| CN85100770A (en) * | 1985-04-01 | 1986-08-27 | 首钢特殊钢公司冶金研究所 | Novel constant magnetic core---1J34H |
| US4877464A (en) * | 1986-06-09 | 1989-10-31 | Allied-Signal Inc. | Rapid magnetic annealing of amorphous metal in molten tin |
| CN101226802A (en) * | 2007-11-16 | 2008-07-23 | 中国计量学院 | Soft magnetic powder core and production method thereof |
Non-Patent Citations (1)
| Title |
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| 热处理对水雾化Fe74Cr2Mo2Sn2P10C2Si4B4非晶磁粉芯性能的影响;李庆达等;《材料热处理学报》;20120425;第33卷(第4期);第1-5页 * |
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