JP3437487B2 - Manufacturing method of clad material for induction heating - Google Patents
Manufacturing method of clad material for induction heatingInfo
- Publication number
- JP3437487B2 JP3437487B2 JP12437499A JP12437499A JP3437487B2 JP 3437487 B2 JP3437487 B2 JP 3437487B2 JP 12437499 A JP12437499 A JP 12437499A JP 12437499 A JP12437499 A JP 12437499A JP 3437487 B2 JP3437487 B2 JP 3437487B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- sensitive magnetic
- clad
- magnetic
- magnetic material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 title claims description 34
- 238000010438 heat treatment Methods 0.000 title claims description 26
- 230000006698 induction Effects 0.000 title claims description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000696 magnetic material Substances 0.000 claims description 45
- 230000035699 permeability Effects 0.000 claims description 26
- 239000007769 metal material Substances 0.000 claims description 22
- 238000000137 annealing Methods 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000001953 recrystallisation Methods 0.000 claims description 5
- 230000009467 reduction Effects 0.000 description 11
- 238000003466 welding Methods 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 7
- 238000005253 cladding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000008157 edible vegetable oil Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910019589 Cr—Fe Inorganic materials 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 2
- 229910018054 Ni-Cu Inorganic materials 0.000 description 2
- 229910018481 Ni—Cu Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Landscapes
- Pressure Welding/Diffusion-Bonding (AREA)
Description
【０００１】[0001]
【発明が属する技術分野】本発明は、感温磁性材とＣｕ
を主成分とする良熱伝導金属材とをクラッドした誘導加
熱用クラッド材の製造方法に関する。TECHNICAL FIELD The present invention relates to a temperature-sensitive magnetic material and Cu.
The present invention relates to a method for producing a clad material for induction heating, which is obtained by clad with a good heat conductive metal material containing as a main component.
【０００２】[0002]
【従来の技術】誘導加熱を利用した電磁調理器、加熱器
等に使用される加熱・保温プレート、鍋、内釜、容器等
は、例えば特開平４−２２０９９０号公報、特開平４−
２４２０９３号公報に記載されているように、温度によ
って透磁率が変化する感温磁性材と良好な熱伝導性を有
するアルミニウム等の金属材とが接合された誘導加熱用
クラッド材によって形成されており、このクラッド材は
７０％以上の圧下率で冷間圧接することにより製造され
ていた。2. Description of the Related Art For example, Japanese Patent Application Laid-Open No. 4-220990 and Japanese Patent Application Laid-Open No. 4-220990 disclose heating / heat-retaining plates, pots, inner pots, and containers used in induction cookers, heaters, and the like that utilize induction heating.
As described in Japanese Patent No. 242093, it is formed of a clad material for induction heating in which a temperature-sensitive magnetic material whose magnetic permeability changes with temperature and a metal material such as aluminum having good thermal conductivity are joined. The clad material was manufactured by cold pressure welding at a reduction rate of 70% or more.
【０００３】前記感温磁性材は、キュリー点付近で透磁
率が急激に変化し、キュリー点を十分に超えた温度では
非磁性体化し、誘導加熱コイルからの交番磁界による渦
電流損が低減し、加熱出力が低下することから、自己温
度制御が可能であり、この種の加熱部材として好適な材
料である。もっとも、感温磁性材はそれ自体の熱伝導率
が低いため、単独で使用すると温度分布が不均一になる
ので、感温磁性材には熱伝導性に優れたアルミニウムな
どの金属材がクラッドされる訳である。因みに、３８wt
％Ｎｉ−８wt％Ｃｒ−Ｆｅ合金で形成された感温磁性材
の熱伝導率は０．０３cal/cm・s ・℃程度であり、一方
アルミニウムの熱伝導率は０．５６cal/cm・s ・℃程度
である。The magnetic permeability of the temperature-sensitive magnetic material changes rapidly near the Curie point, becomes non-magnetic at a temperature sufficiently above the Curie point, and eddy current loss due to the alternating magnetic field from the induction heating coil is reduced. Since the heating output is reduced, self-temperature control is possible and it is a suitable material for this kind of heating member. However, since the temperature-sensitive magnetic material itself has a low thermal conductivity, the temperature distribution will be uneven when used alone.Therefore, the temperature-sensitive magnetic material is clad with a metal material such as aluminum, which has excellent thermal conductivity. It is a translation. By the way, 38wt
The thermal conductivity of the temperature-sensitive magnetic material formed of the% Ni-8 wt% Cr-Fe alloy is about 0.03 cal / cm · s · ° C, while the thermal conductivity of aluminum is 0.56 cal / cm · s ·. It is about ℃.
【０００４】[0004]
【発明が解決しようとする課題】上記のように、誘導加
熱部材の均熱性を確保するには、感温磁性材単独では無
理であり、これに良熱伝導金属材をクラッドすることが
必須となるのであるが、本発明者は誘導加熱用クラッド
材の品質を調査する過程で、クラッド後の感温磁性材は
クラッド前のものに比して温度制御性が急激に低下する
ことを見い出した。磁気特性の観点から温度制御性の低
下の原因を述べたところ、キュリー点における透磁率の
温度変化率ｄμ／ｄＴがクラッドによって急激に低下す
ることがわかった。As described above, in order to ensure the uniform heating of the induction heating member, it is not possible to use the temperature-sensitive magnetic material alone, and it is essential to clad a good heat-conducting metal material to this. However, in the process of investigating the quality of the clad material for induction heating, the present inventor found that the temperature-sensitive magnetic material after clad drastically deteriorated in temperature controllability as compared with that before clad material. . From the viewpoint of magnetic properties, the cause of the decrease in temperature controllability was described, and it was found that the temperature change rate dμ / dT of the magnetic permeability at the Curie point was drastically decreased by the cladding.
【０００５】すなわち、図３(A) 、(B) はクラッド前後
における感温磁性材の温度に対する透磁率の測定結果を
示すグラフであるが、図３(A) に示すように、クラッド
前ではキュリー点における透磁率μの温度変化率ｄμ／
ｄＴが大きいものでも、同図(B) に示すように、クラッ
ド後には前記ｄμ／ｄＴが急激に低下するようになる。
例えば、３８wt％Ｎｉ−８wt％Ｃｒ−Ｆｅ合金からなる
感温磁性材の場合、クラッド前に加工歪みを除去する磁
性焼鈍を施した感温磁性材のキュリー点におけるｄμ／
ｄＴは１０以上であるが、従来レベルの圧下率で圧接し
たクラッド材を構成する感温磁性材のキュリー点におけ
るｄμ／ｄＴは６程度に低下してしまう。ただし、前記
ｄμ／ｄＴの値は、キュリー点の前後における透磁率の
最大値を１００、最小値を１としたときの相対的な透磁
率に対する値である。That is, FIGS. 3 (A) and 3 (B) are graphs showing the measurement results of the magnetic permeability with respect to the temperature of the temperature-sensitive magnetic material before and after the cladding, but as shown in FIG. 3 (A), before the cladding. Temperature change rate of magnetic permeability μ at Curie point dμ /
Even if the dT is large, the dμ / dT sharply decreases after the cladding, as shown in FIG.
For example, in the case of a temperature-sensitive magnetic material composed of 38 wt% Ni-8 wt% Cr-Fe alloy, dμ / curie point of the temperature-sensitive magnetic material that is magnetically annealed before the cladding to remove processing strain.
Although the dT is 10 or more, the dμ / dT at the Curie point of the temperature-sensitive magnetic material forming the clad material pressed at the conventional reduction rate is reduced to about 6. However, the value of dμ / dT is a value with respect to relative magnetic permeability when the maximum value of magnetic permeability before and after the Curie point is 100 and the minimum value is 1.
【０００６】このように、クラッド後の感温磁性材はキ
ュリー点におけるｄμ／ｄＴが急激に低下し、感温磁性
材の温度変化に対する温度制御性が著しく劣化するよう
になり、本来の磁気特性を犠牲にした状態での使用を余
儀なくされている。As described above, in the temperature-sensitive magnetic material after clad, the dμ / dT at the Curie point is drastically decreased, and the temperature controllability of the temperature-sensitive magnetic material with respect to the temperature change is remarkably deteriorated. Have been forced to use at the expense of.
【０００７】本発明はかかる問題に鑑みなされたもの
で、感温磁性材が本来有している磁気特性を有効に利用
することができる、温度制御性に優れた誘導加熱用クラ
ッド材の製造方法を提供するものである。The present invention has been made in view of the above problems, and is a method for producing a clad material for induction heating having excellent temperature controllability, which can effectively utilize the magnetic characteristics originally possessed by the temperature-sensitive magnetic material. Is provided.
【０００８】[0008]
【課題を解決するための手段】本発明は、感温磁性材と
良熱伝導金属材とを圧接する際の圧下率とキュリー点に
おけるｄμ／ｄＴとの関係について鋭意研究したとこ
ろ、従来レベルの圧下率では圧下に伴う加工歪によりｄ
μ／ｄＴが急激に劣化することが見い出された。本発明
はかかる知見に基づいて完成されてものである。すなわ
ち、請求項１に記載した本発明の誘導加熱用クラッド材
の製造方法は、温度によって透磁率が変化する感温磁性
材と良熱伝導金属材とを圧接した後、前記感温磁性材の
再結晶温度以上、前記良熱伝導金属材の融点未満の温度
で加熱して感温磁性材に存在する加工歪を除去する磁性
焼鈍を施すものである。DISCLOSURE OF THE INVENTION According to the present invention, as a result of an intensive study on the relationship between the rolling reduction rate and the dμ / dT at the Curie point when the temperature-sensitive magnetic material and the good thermal conductive metal material are pressure-welded, At the reduction rate, d due to processing strain associated with the reduction
It was found that μ / dT deteriorates sharply. The present invention has been completed based on such findings. That is, in the method for producing the clad material for induction heating according to the present invention as set forth in claim 1, after the temperature sensitive magnetic material whose magnetic permeability changes with temperature and the good heat conductive metal material are pressed together, the temperature sensitive magnetic material The magnetic annealing is performed by heating at a temperature not lower than the recrystallization temperature and lower than the melting point of the good thermal conductive metal material so as to remove processing strain existing in the temperature-sensitive magnetic material.
【０００９】この発明によると、感温磁性材は良熱伝導
金属材と圧接された後に、再結晶温度以上、良熱伝導金
属材の融点未満の温度で加熱して感温磁性材に存在する
加工歪を除去する磁性焼鈍が施されるので、圧接の際に
導入された加工歪に起因した、キュリー点における透磁
率の温度変化率ｄμ／ｄＴの劣化が解消され、クラッド
材を構成する感温磁性材のキュリー点の前後における透
磁率の最大値を１００、最小値を１としたとき、当該感
温磁性材のキュリー点における相対的な透磁率の温度変
化率ｄμ／ｄＴを１０以上、好ましくは１５以上、より
好ましくは２０以上とすることができ、その感温磁性材
が本来有する磁気特性を有効に利用した良好な温度制御
性を備えたクラッド材を容易に製造することができる。According to the present invention, the temperature-sensitive magnetic material is present in the temperature-sensitive magnetic material after being pressed into contact with the good heat-conductive metal material and then heated at a temperature not lower than the recrystallization temperature and lower than the melting point of the good heat-conductive metal material. Since the magnetic annealing is performed to remove the processing strain, the deterioration of the temperature change rate dμ / dT of the magnetic permeability at the Curie point due to the processing strain introduced during the pressure welding is eliminated, and the feeling of forming the clad material is eliminated. When the maximum value of the magnetic permeability before and after the Curie point of the warm magnetic material is 100 and the minimum value is 1, the temperature change rate of relative magnetic permeability dCu / dT at the Curie point of the temperature sensitive magnetic material is 10 or more, It is preferably 15 or more, and more preferably 20 or more, and a clad material having good temperature controllability that effectively utilizes the magnetic characteristics originally possessed by the temperature-sensitive magnetic material can be easily manufactured.
【００１０】本発明で行う圧接方法としては、一対のロ
ール間に重ね合わせた素材を通すことによって圧接する
ロール圧接が実施容易で、生産性に優れるため、好適で
ある。圧接の種類としては冷間圧接、温間圧接、１×１
０-1Torr以下の真空雰囲気で圧接する真空圧接のいずれ
の方法でもよい。また、圧下率は、磁性焼鈍の際に接合
力が向上するため、感温磁性材と良熱伝導金属材とが搬
送に耐える程度の接合力が得られるように設定すればよ
い。なお、クラッド材をプレス成形する場合は、ある程
度の接合力が必要であるので、圧接後に感温磁性材又は
良熱伝導金属材の融点の内、低い方の融点未満の温度で
数分間保持する拡散焼鈍を行って接合力を向上させ、プ
レス成形を行った後、磁性焼鈍を施せばよい。拡散焼鈍
は通常のように搬送ラインに設けられたトンネル炉にて
行えばよい。As a pressure welding method used in the present invention, roll pressure welding in which pressure is applied by passing a superposed material between a pair of rolls is preferable because it is easy to carry out and is excellent in productivity. Cold welding, warm welding, 1 × 1
Any method of vacuum pressure contacting in a vacuum atmosphere of 0 -1 Torr or less may be used. Further, the rolling reduction may be set so that the joining force is improved during the magnetic annealing, so that the joining force between the temperature-sensitive magnetic material and the good thermal conductive metal material can be carried. Since a certain degree of bonding force is required when press-molding the clad material, it is held for several minutes at a temperature lower than the lower melting point of the temperature-sensitive magnetic material or the good thermal conductive metal material after pressure welding. Magnetic annealing may be performed after diffusion annealing is performed to improve the bonding strength and press forming is performed. Diffusion annealing may be carried out in a tunnel furnace provided in the transfer line as usual.
【００１１】圧接前の感温磁性材および良熱伝導金属材
の厚さは、好ましくは圧接後の厚さが、感温磁性材では
磁束が通る浸透深さを確保するために０．０３〜０．５
mmになるように、また良熱伝導金属材では良好な温度均
一性を確保するために０．３〜６．０mmになるように、
圧下率を考慮して素材厚さを設定すればよい。The thickness of the temperature-sensitive magnetic material and the heat-conductive metal material before the pressure welding is preferably 0.03 to the thickness after the pressure welding so as to secure the penetration depth of the magnetic flux in the temperature-sensitive magnetic material. 0.5
mm, and for a good heat conductive metal material, 0.3 to 6.0 mm in order to ensure good temperature uniformity,
The material thickness may be set in consideration of the reduction rate.
【００１２】なお、前記ｄμ／ｄＴは、キュリー点の前
後における透磁率の最大値を１００、最小値を１とした
ときの相対的な透磁率に対する値であり、最小値は非磁
性状態を示し、比透磁率が１であることに対応させたも
のである。ｄμ／ｄＴを透磁率の相対値に対して求める
こととしたのは、透磁率は感温磁性材の成分、測定条件
によって大きく異なり、また本発明は透磁率の絶対値が
問題なのではなく、温度に対する変化が問題であるの
で、透磁率の相対値に対するｄμ／ｄＴを規定すること
にしたものである。透磁率の最大値、最小値は、通常、
（キュリー点−１００）℃から（キュリー点＋５０）℃
の温度範囲で現れるので、実際的にはこの温度範囲で測
定すればよい。The dμ / dT is a value for the relative magnetic permeability when the maximum value of the magnetic permeability before and after the Curie point is 100 and the minimum value is 1, and the minimum value indicates a non-magnetic state. , The relative magnetic permeability is 1. The reason why dμ / dT is determined with respect to the relative value of the magnetic permeability is that the magnetic permeability greatly differs depending on the components of the temperature-sensitive magnetic material and the measurement conditions, and in the present invention, the absolute value of the magnetic permeability does not matter. Since the change with temperature is a problem, dμ / dT is defined with respect to the relative value of magnetic permeability. The maximum and minimum values of permeability are usually
(Curie point −100) ° C. to (Curie point +50) ° C.
Since it appears in this temperature range, it is practically possible to measure in this temperature range.
【００１３】また、請求項２に記載した誘導加熱用クラ
ッド材の製造方法は、感温磁性材が４０〜６００℃のキ
ュリー点を有する感温磁性金属であり、良熱伝導金属材
がＣｕを主成分とするＣｕ基金属で形成されたものであ
る。In the method for producing the clad material for induction heating according to the second aspect, the temperature-sensitive magnetic material is a temperature-sensitive magnetic metal having a Curie point of 40 to 600 ° C., and the good heat-conductive metal material is Cu. It is formed of a Cu-based metal as a main component.
【００１４】この発明によると、感温磁性材としてその
キュリー点が４０〜６００℃のものを用いるので、調理
温度として好適な温度範囲での温度制御を実現すること
ができる。このようなキュリー点を備えた感温磁性材と
しては、例えばＦｅ−Ｎｉ合金（好ましくはＮｉ≧３０
wt％）、Ｆｅ−Ｎｉ−Ｃｒ合金（好ましくはＮｉ：３０
〜６５wt％、好ましくはＣｒ≦２０wt％）、Ｎｉ−Ｃｕ
合金（好ましくはＣｕ≧３５wt％以上）あるいは純Ｎｉ
をあげることができる。According to the present invention, since the Curie point of 40 to 600 ° C. is used as the temperature-sensitive magnetic material, it is possible to realize temperature control within a temperature range suitable as a cooking temperature. An example of the temperature-sensitive magnetic material having such a Curie point is a Fe—Ni alloy (preferably Ni ≧ 30).
wt%), Fe-Ni-Cr alloy (preferably Ni: 30)
~ 65 wt%, preferably Cr≤20 wt%), Ni-Cu
Alloy (preferably Cu ≧ 35 wt% or more) or pure Ni
Can be raised.
【００１５】一方、Ｃｕを主成分とするＣｕ基金属は、
市場に多量に供給され、低コストで熱伝導性に優れ、し
かもその融点が前記キュリー点が４０〜６００℃の感温
磁性材の再結晶温度以上であるため、圧接後の磁性焼鈍
を容易に行うことができる。このため、良熱伝導金属材
としてＣｕ基金属を用いることにより、温度制御性、温
度均一性に優れた、低コストのクラッド材を容易に得る
ことができる。前記Ｃｕ基金属としては、純Ｃｕのほ
か、好ましくはＣｕを９０wt％以上含有する各種のＣｕ
合金を用いることができる。On the other hand, the Cu-based metal whose main component is Cu is
It is supplied to the market in large quantities, has excellent thermal conductivity at low cost, and its melting point is higher than the recrystallization temperature of the temperature-sensitive magnetic material having a Curie point of 40 to 600 ° C, facilitating magnetic annealing after pressure welding. It can be carried out. Therefore, by using the Cu-based metal as the good heat conductive metal material, it is possible to easily obtain a low-cost clad material having excellent temperature controllability and temperature uniformity. As the Cu-based metal, in addition to pure Cu, preferably various Cu containing 90 wt% or more of Cu.
Alloys can be used.
【００１６】なお、前記Ｆｅ−Ｎｉ合金、Ｆｅ−Ｎｉ−
Ｃｒ合金、Ｎｉ−Ｃｕ合金あるいは純Ｎｉの場合、再結
晶温度は７００℃以上であり、Ｃｕ基金属の融点は概ね
１０００℃超であるので、磁性焼鈍は下限を７００℃、
好ましくは８５０℃とし、上限を１０００℃、好ましく
は９００℃とすればよい。加熱時間は、加工歪が除去さ
れた再結晶組織が得られるように設定すればよく、好ま
しくは１０min 以上、より好ましくは１５min 以上にす
るのがよい。また、生産性向上の観点からは、４ｈｒ以
内、好ましくは３ｈｒ以内とするのがよい。The above Fe-Ni alloy, Fe-Ni-
In the case of Cr alloy, Ni—Cu alloy or pure Ni, the recrystallization temperature is 700 ° C. or higher, and the melting point of the Cu-based metal is generally higher than 1000 ° C., so the lower limit of magnetic annealing is 700 ° C.
The temperature is preferably 850 ° C., and the upper limit is 1000 ° C., preferably 900 ° C. The heating time may be set so as to obtain a recrystallized structure from which the processing strain is removed, and is preferably 10 minutes or longer, more preferably 15 minutes or longer. Further, from the viewpoint of improving productivity, it is preferably within 4 hours, more preferably within 3 hours.
【００１７】[0017]
【実施例】感温磁性金属（３８wt％Ｎｉ−８wt％Ｃｒ−
Ｆｅ合金、キュリー点１７２℃）のフープ材に、９９．
９％の純Ｃｕのフープ材を重ね合わせて、下記表１の接
合方法、圧下率にてロール圧接を行い、その後、バッチ
式焼鈍炉にて同表に示す条件で磁性焼鈍を行い、図１に
示すように、感温磁性材２に純Ｃｕからなる良熱伝導金
属材３が接合された誘導加熱用クラッド材１を製造し
た。試料No. １の感温磁性材２の厚さは０．１mm、良熱
伝導金属材３の厚さは１．０mmであった。 EXAMPLE Temperature-sensitive magnetic metal (38 wt% Ni-8 wt% Cr-
Fe alloy, Curie point 172 ℃) hoop material, 99.
The 9% pure Cu hoop material was overlaid, the rolls were pressure welded with the bonding method and the rolling reduction shown in Table 1 below, and then magnetic annealing was performed in a batch type annealing furnace under the conditions shown in the table. As shown in, the induction heating clad material 1 in which the good thermal conductive metal material 3 made of pure Cu is bonded to the temperature-sensitive magnetic material 2 was manufactured. The thickness of the temperature-sensitive magnetic material 2 of sample No. 1 is 0.1 mm, good heat
The conductive metal material 3 had a thickness of 1.0 mm.
【００１８】各クラッド材１から幅２０mm、長さ３０mm
の条材を切り取り、その回りに測定用コイル（１次コイ
ル、２次コイル）を付設し、これを加熱炉内に設置し、
室温からキュリー点＋５０℃まで温度を徐々に上げ、１
次コイルに基準電流を流した際に２次コイルに誘導され
た電圧を各温度ごとに測定し、この電圧を基にして透磁
率を求め、その最大値を１００、最小値を１としてキュ
リー点における相対的な透磁率の温度変化率ｄμ／ｄＴ
を求めた。Width 20 mm, length 30 mm from each clad material 1
Cut off the strip of material, attach a measuring coil (primary coil, secondary coil) around it, and install it in the heating furnace.
Gradually raise the temperature from room temperature to Curie point + 50 ° C. 1
The voltage induced in the secondary coil when a reference current is applied to the secondary coil is measured at each temperature, and the magnetic permeability is calculated based on this voltage. The maximum value is 100 and the minimum value is 1, and the Curie point is set. Relative temperature change rate of magnetic permeability dμ / dT
I asked.
【００１９】また、上記クラッド材１を２００φmmの大
きさに切断し、これを用いて温度制御試験を以下の要領
で実施した。図２に示すように、高周波コイル１１の上
に前記クラッド材１からなる加熱保温プレートを設置
し、その上に非磁性容器（ステンレス鋼容器）１２を載
置した。この容器１２に食用油１３を満たし、前記コイ
ル１１に周波数３０ｋＨｚ、最大電力１２００Ｗのイン
バータ電源を接続し、容器１２内の食用油１３の温度を
測定した。電圧印加直後は食用油１３の温度は急速に上
昇するが、やがてキュリー点付近で一定温度に落ちつ
く。この定常状態における温度制御範囲を測定し、±５
℃内に温度制御された場合を優良◎、±１０℃内に温度
制御された場合を良○、±１０℃内から外れた場合を不
良×とした。これらの測定結果を表１に併せて示す。Further, the clad material 1 was cut into a size of 200 mm, and a temperature control test was carried out using the cut material in the following manner. As shown in FIG. 2, a heating and heat insulating plate made of the clad material 1 was placed on the high frequency coil 11, and a non-magnetic container (stainless steel container) 12 was placed thereon. The container 12 was filled with edible oil 13, an inverter power source with a frequency of 30 kHz and a maximum electric power of 1200 W was connected to the coil 11, and the temperature of the edible oil 13 in the container 12 was measured. Immediately after the voltage is applied, the temperature of the edible oil 13 rises rapidly, but eventually it reaches a constant temperature near the Curie point. The temperature control range in this steady state is measured and ± 5
When the temperature was controlled within 0 ° C, it was rated as excellent, when it was controlled within ± 10 ° C, it was rated as good, and when it was out of ± 10 ° C, it was rated as bad. The results of these measurements are also shown in Table 1.
【００２０】[0020]
【表１】 [Table 1]
【００２１】表１より、発明例のクラッド材では、キュ
リー点におけるｄμ／ｄＴが１５以上であり、良好な温
度制御性が得られている。特に磁性焼鈍を８５０℃以上
で行った試料No.４，５では、７０％という高圧下率で
の冷間圧接を行ったにもかかわらず、優れた温度制御性
が得られている。From Table 1, in the clad materials of the invention examples, dμ / dT at the Curie point is 15 or more, and good temperature controllability is obtained. In particular, in Sample Nos. 4 and 5 in which magnetic annealing was performed at 850 ° C. or higher, excellent temperature controllability was obtained despite cold welding at a high pressure reduction rate of 70%.
【００２２】一方、比較例のNo. ６では、圧下率が７０
％と高く、磁性焼鈍が施されていないため、キュリー点
における相対的な透磁率のｄμ／ｄＴが６であり、温度
制御性も著しく低下している。On the other hand, in No. 6 of the comparative example, the rolling reduction is 70
%, And the relative magnetic permeability dCu / dT at the Curie point is 6 because the magnetic annealing is not performed, and the temperature controllability is also significantly reduced.
【００２３】[0023]
【発明の効果】本発明の誘導加熱用クラッド材の製造方
法によれば、感温磁性材と良熱伝導金属材とを圧接後に
磁性焼鈍を施すので、圧下率にかかわらず、感温磁性材
のキュリー点における相対的な透磁率のｄμ／ｄＴを１
０以上とすることができ、感温磁性材の本来の磁気特性
を有効に利用することができ、良好な温度制御性を備え
たクラッドを容易に製造することができ、量産性、生産
性にも優れる。According to the method for manufacturing the clad material for induction heating of the present invention, since the temperature-sensitive magnetic material and the good heat-conducting metal material are magnetically annealed after being pressed, the temperature-sensitive magnetic material is produced regardless of the reduction rate. The relative magnetic permeability dμ / dT at the Curie point of is 1
It can be set to 0 or more, the original magnetic characteristics of the temperature-sensitive magnetic material can be effectively used, and a clad having good temperature controllability can be easily manufactured, which improves mass productivity and productivity. Is also excellent.
【図１】本発明にかかる誘導加熱用クラッド材の要部断
面図である。FIG. 1 is a sectional view of an essential part of a clad material for induction heating according to the present invention.
【図２】実施例で行った、誘導加熱用クラッド材の温度
制御試験の実施要領説明図である。FIG. 2 is an explanatory diagram of an implementation point of a temperature control test of a clad material for induction heating performed in an example.
【図３】クラッド前の感温磁性材の透磁率の温度による
影響を説明したグラフ(A) 、および従来の誘導加熱用ク
ラッド材を構成する感温磁性材の透磁率の温度による影
響を示すグラフ(B) である。FIG. 3 is a graph (A) illustrating the effect of temperature on the magnetic permeability of the temperature-sensitive magnetic material before clad, and the effect of temperature on the magnetic permeability of the temperature-sensitive magnetic material that constitutes the conventional induction heating clad material. Graph (B).
１ クラッド材 ２ 感温磁性材 ３ 良熱伝導金属材 1 Clad material 2 Temperature-sensitive magnetic material 3 Good heat conductive metal material
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ２３Ｋ 103:22 Ｂ２３Ｋ 103:22 (56)参考文献 特開 平９−237677（ＪＰ，Ａ) 特開 平９−129362（ＪＰ，Ａ) 特開 平９−108851（ＪＰ，Ａ) 特開 平９−103360（ＪＰ，Ａ) 特開 平８−309561（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B23K 20/00 - 20/26 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI B23K 103: 22 B23K 103: 22 (56) References JP-A-9-237677 (JP, A) JP-A-9-129362 (JP , A) JP-A-9-108851 (JP, A) JP-A-9-103360 (JP, A) JP-A-8-309561 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB) Name) B23K 20/00-20/26
Claims (2)
材と良熱伝導金属材とを圧接した後、前記感温磁性材の
再結晶温度以上、前記良熱伝導金属材の融点未満の温度
で加熱して感温磁性材に存在する加工歪を除去する磁性
焼鈍を施す誘導加熱用クラッド材の製造方法。1. A temperature not lower than a recrystallization temperature of the temperature-sensitive magnetic material and lower than a melting point of the good heat-conductive metal material after pressure-contacting the temperature-sensitive magnetic material whose magnetic permeability changes with temperature and the good heat-conductive metal material. A method for producing a clad material for induction heating, which comprises magnetic annealing for heating to remove processing strain existing in a temperature-sensitive magnetic material.
点を有する感温磁性金属であり、良熱伝導金属材がＣｕ
を主成分とするＣｕ基金属で形成された請求項１に記載
した誘導加熱用クラッド材の製造方法。2. The temperature-sensitive magnetic material is a temperature-sensitive magnetic metal having a Curie point of 40 to 600 ° C., and the good heat conductive metal material is Cu.
The method for producing a clad material for induction heating according to claim 1, wherein the clad material is formed of a Cu-based metal containing as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12437499A JP3437487B2 (en) | 1999-04-30 | 1999-04-30 | Manufacturing method of clad material for induction heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12437499A JP3437487B2 (en) | 1999-04-30 | 1999-04-30 | Manufacturing method of clad material for induction heating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000312978A JP2000312978A (en) | 2000-11-14 |
| JP3437487B2 true JP3437487B2 (en) | 2003-08-18 |
Family
ID=14883828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12437499A Expired - Fee Related JP3437487B2 (en) | 1999-04-30 | 1999-04-30 | Manufacturing method of clad material for induction heating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3437487B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003332033A (en) * | 2002-05-15 | 2003-11-21 | Fuji Electric Co Ltd | Temperature control method for electromagnetic induction heating instrument |
-
1999
- 1999-04-30 JP JP12437499A patent/JP3437487B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JP2000312978A (en) | 2000-11-14 |
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