CN1064090C - Thermomagnetic sensitive functional alloy - Google Patents
Thermomagnetic sensitive functional alloy Download PDFInfo
- Publication number
- CN1064090C CN1064090C CN97111715A CN97111715A CN1064090C CN 1064090 C CN1064090 C CN 1064090C CN 97111715 A CN97111715 A CN 97111715A CN 97111715 A CN97111715 A CN 97111715A CN 1064090 C CN1064090 C CN 1064090C
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- aluminium
- icing
- transmission lines
- thermomagnetic
- electric transmission
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Abstract
The present invention relates to a thermomagnetic sensitive functional alloy which is wound on electric transmission lines in a spiral type. When alternate electric current passes through the electric transmission lines, induced magnetic hysteresis loss and vortex flow loss can be generated from materials, are expressed in a heat form, and are used for removing or preventing the electric transmission lines from icing. The alloy chemical compositions contain at most 0.05 % of C, 0.3 to 2.8 % of Si, 0.60 to 4.0 % of Mn, at most 0.02 % of P, at most 0.02 % of S, 31.0 to 35.0 % of Ni, 0.60 to 4.0% of Cr, 0.20 to 2.5 % of Cu and Fe as the rest, wherein the total contents of the Cr, the Mn, the Si and the Cu are not larger than 10%. Finished products are wire rods whose diameters are from 2.1 to 2.3mm, and the surface aluminum covering proportion is from 18 to 35 %.
Description
The present invention relates to a kind of pyromagnetic sensitization functional material.
In the actual life, because of icing often appears in meteorological reason transmitting line in the winter time.The icing of circuit can cause that lead jumps, waves, and causes accidents such as alternate lead short circuit, and serious icing also can cause serious accidents such as broken string, the bar of falling the tower.According to incompletely statistics, the direct economic loss that the annual because ice of China, snow injury cause reaches several ten million yuan, and sometimes even up to more than one hundred million units, its indirect economic loss is inestimable especially.Particularly in recent years, respectively in the Xining, Qinghai, three 330KV, 500KV transmitting line have taken place and have fallen Serious Accidents such as tower, short-term in ground such as Jingmen, Hubei, the direct economic loss of three accidents is up to up to ten million units.The existing nearly 40 years history of research work that carry out at the serious icing of transmitting line countries in the world.Comply with the different of geography, meteorological conditions, economic strength and electric network composition, the de-icing method that various countries adopt too.USSR (Union of Soviet Socialist Republics) mainly adopts electric de-icing method.But the main drawback of this method is: under partial area icing situation for long transmission line, though adopt the method that increases line current that the ice in icing district has been melted, but quite Chang not icing district circuit will consume a large amount of electric energy in vain, even the lead of some circuit possibility is overheated, influences the life-span of lead.Canada and some other country of America then adopt the method for strengthening tower bar, pylon to resist ice, but this will increase initial cost on the one hand, and its financial need of transformation for existing circuit is also big simultaneously; On the other hand, this method can't avoid different times behind the circuit icing to deice and deice that lead that jump may cause is collided and accident such as the short circuit that causes, broken string.Japan maintains the leading position aspect the research of snow defence measure, and they mainly adopt, and low Curie temperature magnetic heating line is anti-icing, snow and coating method snow defence, but Curie temperature more than 100 ℃, then consuming electric power is big under the normal temperature.The country that also has has carried out 500KV line outage and do not have a power failure short circuit and on-load de-icing technology, and these method constructions are complicated, and cost is also high, and particularly on-load ice-melt also need be equipped with voltage range substation.The country that also has adopts PTC device (PTC is the abbreviation of positive temperature coefficient), but it need be equipped with special ice-melt transformer, and the deicing effect is also also not obvious.In a word, up till now for extremely, anti-, the deicing measure that successively adopt countries in the world have: LC magnetic hot line, chemical coating, PTC device, power failure ice-melt, track remodelling, charged ice-melt, employing extra-heavy tower bar, frame etc., they all respectively have characteristics, but all do not reach good deicing effect.
Purpose of the present invention is sought a kind of pyromagnetic sensitization functional material exactly, and the high heat generation characteristic that utilizes this material to have at low temperatures prevents, removes the purpose of freezing on the transmitting line to reach.This material is calorific value≤5w/kg in the time of 20 ℃, calorific value 〉=14w/kg in the time of-5～0 ℃.
For realizing goal of the invention of the present invention, adopted following technical scheme: the chemical ingredients of core alloy: C≤0.05%, Si0.3～2.8%, Mn0.60～4.0%, P≤0.02%, S≤0.02%, Ni31.0～35.0%, Cr0.60～4.0%, Cu0.20～2.5%, the Fe surplus, wherein the Cr+Mn+Si+Cu total content is not more than 10%, adopts vacuum induction furnace or non-vacuum induction furnace to smelt, and waters into garden post ingot, forge and be rolled into φ 8mm wire rod through 1150～1250 ℃, last cold-drawn becomes φ 2.1～2.3mm wire rod.This wire surface covers aluminium, and covering al proportion is 18-35%.
Cover Curie temperature≤80 ℃ of material behind the aluminium, saturation induction density 〉=0.4T, its substance calorific value 〉=14W/Kg, this material is wrapped on the transmitting line with spiral form.When exchange current when the transmitting line, the transmitting line alternating magnetic field of will inducting.Composite wire is a ferromagnetic body, and in this case, it can produce induct magnetic hysteresis loss and eddy-current loss, and they show with the form of heat.When if the heat that produces in the unit time is enough, it raises the transmitting line surface temperature by thermal conduction on the one hand, and on the other hand, the temperature of itself is also enough high, removes or prevent that transmitting line from freezing thereby can reach.
The aluminothermy magnetosensitive sense functional materials that covers of the present invention is compared with other de-icing method, has following characteristics: 1. winter, spring two seasons deicing effect are obvious; 2. the calorific value of covering under the aluminium wire normal temperature of the present invention is low, and energy waste is few, and it is to not infringement of transmission line wire, and its executive cost is low simultaneously, has good economy; 3. of the present invention to cover aluminium wire proportion little, only 5.46-6.12g/cm
3, this helps alleviating the transmitting line load; 4. the aluminium wire that covers of the present invention can adopt artificial or mechanical means to be wrapped on the serious transmitting line of any ice, snow disaster, and is easy to use, simple to operate, practical.5. the aluminium wire that covers of the present invention is suitable for the deicing of high mountain area transmitting line, is particularly conducive to big leap and some can't avoid anti-, the deicing of the important line in icing district.
Further specify technical scheme of the present invention below by embodiment.
Embodiment 1, the chemical ingredients of core alloy: C0.02%, Si2.86%, Mn1.79%, P＜0.03%, S0.005%, Ni32.88%, Cr0.60%, Cu0.20%, Fe surplus.It is smelted by antivacuum high frequency furnace, waters into cylindrical steel ingot, forges into 40 * 40mm square billet under 1120 ± 20 ℃, is rolled into φ 8mm wire rod then, and last cold-drawn becomes φ 2.0mm, wire rod.Wire rod is 1050 ℃ of annealing down, and aluminium-coating surface, alclad account for 22% of integral body.Recording Curie temperature is 80 ℃, and saturation induction density is 0.55T under the room temperature, and the substance calorific value is 15.1w/kg.
Cover aluminium wire and be wrapped on the LGT-300 type transmitting line with spiral form, galvanization 140A, test conditions are that temperature on average is-3.5 ℃, and night, minimum temperature was-10 ℃, and mean wind speed is 3m/s, and freezing of transmitting line is freezing fog.Test has tangible deicing effect.
Embodiment 2, the chemical ingredients C0.01% of core alloy, Si1.01%, Mn0.60%, P＜0.03%, S0.004%, Ni33.15%, Cr3.45%, Cu1.09%, Fe surplus.It waters into garden cylindricality steel ingot by vacuum induction furnace smelting, forges into 40 * 40mm square billet under 1150 ± 20 ℃, is rolled into φ 8mm wire rod then, and last cold-drawn becomes φ 2.2mm material.Wire rod is 1100 ℃ of annealing down, and aluminium-coating surface, alclad account for 25% of integral body.Recording Curie temperature is 80 ℃, and saturation induction density is 0.62T under the room temperature, and recording the substance calorific value is 14.7w/kg.
Covering aluminium wire and be wrapped on the transmitting line with spiral form, is 180A by electric current, and test has tangible deicing effect.
Embodiment 3, the chemical ingredients of core alloy: C0.01%, Si0.35%, Mn2.80%, P＜0.02%, S0.006%, Ni34.62%, Cr0.60%, Cu1.85%, Fe surplus.It is smelted by antivacuum medium-frequency induction furnace, waters into garden cylindricality steel ingot, forges into 40 * 40mm square billet under 1200 ± 20 ℃, is rolled into φ 8mm wire rod then, and last cold-drawn becomes φ 2.2mm wire rod.Wire rod is 1150 ℃ of annealing down, and aluminium-coating surface, alclad account for 30% of integral body.Recording Curie temperature is 80 ℃, and saturation induction density is 0.54T under the room temperature, and the substance calorific value is 15.9W/Kg.
Cover aluminium wire and be wrapped on the transmitting line with spiral form, by electric current 160A, test conditions is, temperature is 0～-10 ℃, wind speed 3～20m/s, and thick fog or sleet are arranged, significantly anti-, deicing effect are arranged.
Claims (1)
1. pyromagnetic sensitization functional material, it is characterized in that: material is made up of core alloy and aluminium-coating surface layer, the chemical ingredients of its core alloy: C≤0.05%, Si0.3～2.8%, Mn0.60～4.0%, P≤0.02%, S≤0.02%, Ni31.0～35.0%, Cr0.60～4.0%, Cu0.20～2.5%, Fe surplus, wherein the Cr+Mn+Si+Cu total content is not more than 10%; After being processed into wire rod, wire surface covers aluminium, and covering al proportion is 18-35%, covers Curie temperature≤80 ℃ of material behind the aluminium, saturation induction density 〉=0.4T, its substance calorific value 〉=14W/Kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97111715A CN1064090C (en) | 1997-05-05 | 1997-05-05 | Thermomagnetic sensitive functional alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97111715A CN1064090C (en) | 1997-05-05 | 1997-05-05 | Thermomagnetic sensitive functional alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1198477A CN1198477A (en) | 1998-11-11 |
| CN1064090C true CN1064090C (en) | 2001-04-04 |
Family
ID=5171822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97111715A Expired - Lifetime CN1064090C (en) | 1997-05-05 | 1997-05-05 | Thermomagnetic sensitive functional alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1064090C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2786504B1 (en) * | 1998-12-01 | 2001-01-05 | Imphy Sa | CULINARY CONTAINER FOR INDUCTION HEATING AND ALLOY FOR MAKING SUCH A CONTAINER |
| CN101625909B (en) * | 2008-07-10 | 2012-05-02 | 中国电力科学研究院 | Method for manufacturing heating monofilament of composite conductive wire |
| CN112962031B (en) * | 2021-02-03 | 2022-05-03 | 北京北冶功能材料有限公司 | Deicing material for power transmission line and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58203614A (en) * | 1982-05-21 | 1983-11-28 | Tdk Corp | Magnetic head |
-
1997
- 1997-05-05 CN CN97111715A patent/CN1064090C/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58203614A (en) * | 1982-05-21 | 1983-11-28 | Tdk Corp | Magnetic head |
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| Publication number | Publication date |
|---|---|
| CN1198477A (en) | 1998-11-11 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Shougang Co., Ltd. Assignor: Capital Iron & Steel General Company Contract fulfillment period: In May 5, 2017, 15 years, the patent expires Contract record no.: 200210042 Denomination of invention: A thermo magnetic sensitive functional material Granted publication date: 20010404 License type: Exclusive Record date: 2002.6.3 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2017.5.5, 15 YEARS, EXPIRATION OF PATENT RIGHT Name of requester: BEIJING SHOUDU STEEL CO., LTD. Effective date: 20020603 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090424 Address after: Technical and Quality Department of Shijingshan Shougang Group Corporation, Beijing: 100041 Co-patentee after: Beijing Beiye Functional Materials Corporation Patentee after: Shougang Address before: Technical and Quality Department of Shijingshan Shougang Group Corporation, Beijing: 100041 Patentee before: Capital Iron & Steel General Company |
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| CX01 | Expiry of patent term |
Granted publication date: 20010404 |
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| CX01 | Expiry of patent term |