CN103509916A - Vacuum annealing method for amorphous alloy iron cores - Google Patents
Vacuum annealing method for amorphous alloy iron cores Download PDFInfo
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- CN103509916A CN103509916A CN201310518654.9A CN201310518654A CN103509916A CN 103509916 A CN103509916 A CN 103509916A CN 201310518654 A CN201310518654 A CN 201310518654A CN 103509916 A CN103509916 A CN 103509916A
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Abstract
The invention provides a vacuum annealing method for amorphous alloy iron cores. The vacuum annealing method comprises the following steps: loading into a furnace, connecting busbars, inserting a thermocouple, closing a furnace door, controlling the temperature and cooling, and further comprises the two following steps of annealing furnace vacuumizing and nitrogen filling. With the adoption of the vacuum annealing method for the amorphous alloy iron cores, the stress of the iron cores can be effectively removed, and due to the addition of the vacuumizing and the nitrogen filling links, not only are the iron cores not rusted, but also the performance after annealing can reach the design requirement and the numerical value is kept stable.
Description
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Technical field
The present invention relates to transformer processing technique field, in particular, relate to a kind of vacuum annealing process method of amorphous alloy iron core.
Background technology
At power equipment, manufacture field, non-crystaline amorphous metal obtains favor with its excellent performance.The appendiron core transformer being processed by non-crystaline amorphous metal, owing to having the features such as the high and low loss of hardness, low operating temperature and resistance to harmonic wave, makes it in the national economy of advocating energy-saving and emission-reduction is produced, have very important using value.
Transformer with amorphous alloy made iron core, in the process of processing, in order to obtain low-loss performance and to remove the stress that amorphous alloy iron core produces in winding process, need to carry out anneal to amorphous alloy iron core.In the prior art, because the annealing of amorphous alloy iron core is not generally used and is vacuumized such link, so iron core is easily followed the air generation oxidizing reaction in annealing furnace when the high temperature being heated to more than 300 ℃, can make so on the one hand iron core surface that corrosion occurs, also can there are some and fluctuate unexpectedly in the annealing numerical value of iron core on the other hand, brought adverse influence finally to the application of transformer.
Summary of the invention
For the problem that in above prior art, amorphous alloy iron core occurs in annealing, the object of this invention is to provide a kind of practicality vacuum annealing method of amorphous alloy iron core safely and effectively.
Technical scheme: a kind of vacuum annealing method of amorphous alloy iron core, comprise shove charge, connect omnibus bar, insert thermopair, close fire door, temperature is controlled, cooling these stages, the above stage also comprises that annealing furnace vacuumizes and these two links of inflated with nitrogen.At annealing furnace, vacuumize in link, when iron core is up to 260 ℃ (iron cores that T band is made) or 230 ℃ (iron core that K, N band is made), start to vacuumize; When vacuum tightness≤50Pa, close vacuum unit.Finally, in inflated with nitrogen link, after closing vacuum unit, be slowly filled with nitrogen to 40000Pa.
Compared with prior art, the invention has the beneficial effects as follows: amorphous alloy iron core vacuum annealing method of the present invention can effectively be eliminated the stress of iron core self, owing to having increased, vacuumize and the link of inflated with nitrogen, not only make iron core non-corroding, and the various aspects of performance after its annealing all reaches design requirements and keeps numerical stability.
Accompanying drawing explanation
Fig. 1 is the annealing operation schema of the amorphous alloy iron core in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, set forth the specific embodiment of the present invention.
Enforcement of the present invention is divided into eight steps, as shown in Figure 1, that is: shove charge, connect omnibus bar, insert thermopair, close fire door, vacuumize, inflated with nitrogen, temperature are controlled, cooling stages, are below concrete implementation and operation flow process:
1) iron core of forming is hung and moved on annealing grate with magnet, keep the spacing between each iron core to be greater than 100 millimeters, annealing position number is clear and definite;
2) all omnibus bars are passed to iron core, the oxidized portion of omnibus bar is processed clean, guarantees contact reliably, and all omnibus bars are fastening reliable, and insulation resistance is 0, and must not contact with iron core;
3) every layer of choosing three iron cores (three marginal positions) wherein, insert thermocouple so that measure temperature, and the degree of depth approaches 1/2nd left and right of iron core width;
4) close fire door, enter the preparation before start;
5) when iron core top temperature to 190 ℃, open magnetic field power supply, temperature-rise period furnace temperature is set as 350 ℃, when iron core is up to 260 ℃ (iron cores that T band is made) or 230 ℃ (iron core that K, N band is made), start to vacuumize, open vacuum unit and vacuumize, when vacuum tightness≤50Pa, close vacuum unit, then slowly fill nitrogen to 40000Pa, open successively heating, report to the police, patrol and examine, air blast button; When iron core is up to 300 ℃, if the temperature difference is more than 15 ℃, need to start insulation (La Wen), as the temperature difference, at 15 ℃, with interior continuation, heat up; During insulation (La Wen), the iron core temperature difference is controlled in 15 ℃, and the time was controlled in half an hour; During iron core minimum temperature to 335 ℃, replacement furnace temperature is 335 ℃ and starts insulation; Soaking time is at 75-80 minute (iron core that T band is made) or 65-70 minute (iron core that K, N band is made);
6) between soak, K, N ribbon core top temperature are no more than 360 ℃, and T band is no more than 355 ℃;
7) to finish rear beginning cold by force in insulation, and the highest iron core temperature is cooled to 190 ℃, then closes field ionization source, and can come out of the stove in iron core temperature≤80 ℃ by the time.
From the above, the amorphous alloy iron core vacuum annealing operation of the present embodiment vacuumizes and the link of inflated with nitrogen owing to having increased, and make iron core non-corroding, and performance reaches design requirements numerical stability.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (4)
1. a vacuum annealing method for amorphous alloy iron core, comprises shove charge, connects omnibus bar, inserts thermopair, closes fire door, temperature is controlled, cooling these stages, it is characterized in that: also comprise that annealing furnace vacuumizes and these two links of inflated with nitrogen.
2. the vacuum annealing method of amorphous alloy iron core according to claim 1, it is characterized in that: described annealing furnace vacuumizes link and realizes in temperature controlling stages, when the iron core top temperature that the iron core top temperature to 260 of making when T band ℃ or K, N band are made reaches 230 ℃, start to vacuumize.
3. the vacuum annealing method of amorphous alloy iron core according to claim 1, is characterized in that: described annealing furnace vacuumizes link, when vacuum tightness≤50Pa, closes vacuum unit.
4. the vacuum annealing method of amorphous alloy iron core according to claim 1, is characterized in that: described inflated with nitrogen link is carried out after annealing furnace vacuumizes link, in inflated with nitrogen link, is slowly filled with nitrogen to 40000Pa after closing vacuum unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310518654.9A CN103509916A (en) | 2013-10-29 | 2013-10-29 | Vacuum annealing method for amorphous alloy iron cores |
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| CN201310518654.9A CN103509916A (en) | 2013-10-29 | 2013-10-29 | Vacuum annealing method for amorphous alloy iron cores |
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| CN103509916A true CN103509916A (en) | 2014-01-15 |
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| CN201310518654.9A Pending CN103509916A (en) | 2013-10-29 | 2013-10-29 | Vacuum annealing method for amorphous alloy iron cores |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104252967A (en) * | 2014-06-25 | 2014-12-31 | 上海置信电气非晶有限公司 | Control method for heat treatment of amorphous alloy three-dimensional wound iron core |
| CN104465058A (en) * | 2014-11-27 | 2015-03-25 | 宁波奥克斯高科技有限公司 | Manufacturing method of transformer body of oil immersion type amorphous alloy transformer |
| CN105118653A (en) * | 2015-09-09 | 2015-12-02 | 王新 | Manufacturing method for amorphous alloy core used for motor and transformer |
| CN111554503A (en) * | 2020-05-22 | 2020-08-18 | 浙江德清盛宏电器有限公司 | Manufacturing method of amorphous electronic transformer |
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| JPH0517818A (en) * | 1991-04-15 | 1993-01-26 | Sumitomo Metal Ind Ltd | Heat treatment for magnetic iron-base alloy |
| JPH05202452A (en) * | 1992-01-28 | 1993-08-10 | Sumitomo Metal Ind Ltd | Method for heat-treating iron-base magnetic alloy |
| CN1721086A (en) * | 2004-07-17 | 2006-01-18 | 任连杰 | Novel metal surface layer cleaning method |
| CN202226883U (en) * | 2011-09-15 | 2012-05-23 | 上海日港置信非晶体金属有限公司 | Stress relieving device for amorphous alloy iron core of transformer |
| CN102676757A (en) * | 2012-05-24 | 2012-09-19 | 中兆培基（北京）电气有限公司 | Annealing process of amorphous alloy transformer core |
| CN202626243U (en) * | 2012-05-24 | 2012-12-26 | 中兆培基（北京）电气有限公司 | Annealing device of iron core of amorphous alloy transformer |
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2013
- 2013-10-29 CN CN201310518654.9A patent/CN103509916A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0517818A (en) * | 1991-04-15 | 1993-01-26 | Sumitomo Metal Ind Ltd | Heat treatment for magnetic iron-base alloy |
| JPH05202452A (en) * | 1992-01-28 | 1993-08-10 | Sumitomo Metal Ind Ltd | Method for heat-treating iron-base magnetic alloy |
| CN1721086A (en) * | 2004-07-17 | 2006-01-18 | 任连杰 | Novel metal surface layer cleaning method |
| CN202226883U (en) * | 2011-09-15 | 2012-05-23 | 上海日港置信非晶体金属有限公司 | Stress relieving device for amorphous alloy iron core of transformer |
| CN102676757A (en) * | 2012-05-24 | 2012-09-19 | 中兆培基（北京）电气有限公司 | Annealing process of amorphous alloy transformer core |
| CN202626243U (en) * | 2012-05-24 | 2012-12-26 | 中兆培基（北京）电气有限公司 | Annealing device of iron core of amorphous alloy transformer |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104252967A (en) * | 2014-06-25 | 2014-12-31 | 上海置信电气非晶有限公司 | Control method for heat treatment of amorphous alloy three-dimensional wound iron core |
| CN104252967B (en) * | 2014-06-25 | 2017-02-15 | 上海置信电气非晶有限公司 | Control method for heat treatment of amorphous alloy three-dimensional wound iron core |
| CN104465058A (en) * | 2014-11-27 | 2015-03-25 | 宁波奥克斯高科技有限公司 | Manufacturing method of transformer body of oil immersion type amorphous alloy transformer |
| CN104465058B (en) * | 2014-11-27 | 2017-01-11 | 宁波奥克斯高科技有限公司 | Manufacturing method of transformer body of oil immersion type amorphous alloy transformer |
| CN105118653A (en) * | 2015-09-09 | 2015-12-02 | 王新 | Manufacturing method for amorphous alloy core used for motor and transformer |
| CN111554503A (en) * | 2020-05-22 | 2020-08-18 | 浙江德清盛宏电器有限公司 | Manufacturing method of amorphous electronic transformer |
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Application publication date: 20140115 |