JP2001303161A - Brazing sheet made of aluminum alloy - Google Patents
Brazing sheet made of aluminum alloyInfo
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- JP2001303161A JP2001303161A JP2000119669A JP2000119669A JP2001303161A JP 2001303161 A JP2001303161 A JP 2001303161A JP 2000119669 A JP2000119669 A JP 2000119669A JP 2000119669 A JP2000119669 A JP 2000119669A JP 2001303161 A JP2001303161 A JP 2001303161A
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- brazing
- brazing material
- mass
- aluminum alloy
- aluminum
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、熱交換器等の製造
時においてアルミニウム又はアルミニウム合金材のろう
付時に使用されるアルミニウム合金製ブレージングシー
トに関し、特に真空ろう付性が優れたアルミニウム合金
製ブレージングシートに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum alloy brazing sheet used for brazing aluminum or an aluminum alloy material in the production of heat exchangers and the like, and more particularly to an aluminum alloy brazing excellent in vacuum brazing properties. Regarding the sheet.
【０００２】[0002]
【従来の技術】通常、真空ろう付によるアルミニウム又
はアルミニウム合金製熱交換器等には、Ａｌ−Ｍｎ系合
金又はＡｌ−Ｍｎ−Ｃｕ系合金若しくはＡｌ−Ｍｎ−Ｃ
ｕ−Ｍｇ系合金材等からなる心材の片面又は両面上にＡ
ｌ−Ｓｉ−Ｍｇ系合金ろう材をクラッドしたブレージン
グシートが使用されている。2. Description of the Related Art Generally, a heat exchanger made of aluminum or aluminum alloy by vacuum brazing includes an Al-Mn alloy, an Al-Mn-Cu alloy, or an Al-Mn-C.
A on one or both sides of a core material made of a u-Mg alloy material or the like
A brazing sheet clad with an l-Si-Mg alloy brazing material is used.
【０００３】近時、製品の軽量化に対する要求が高まっ
ているため、真空ろう付法によってアルミニウム又はア
ルミニウム合金からなるブレージングシートをろう付す
る際、ブレージングシートは、ろう付に必要とするろう
以上の余剰なろうをなくす必要がある。必要最低限のろ
うでろう付けするためには、ろう材のぬれ性能がより重
要となる。[0003] In recent years, there has been an increasing demand for weight reduction of products, so that when brazing a brazing sheet made of aluminum or an aluminum alloy by a vacuum brazing method, the brazing sheet is more than a brazing sheet required for brazing. It is necessary to eliminate excess wax. In order to braze with the minimum necessary brazing, the wetting performance of the brazing material becomes more important.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
ブレージングシートではぬれ性が不十分なため、ろう付
けされるアルミニウム又はアルミニウム合金からなるブ
レージングシート間の間隙（クリアランス）をろう材に
よって十分に充填することが困難であり、これにより、
ろう付欠陥が発生する場合がある。However, since the conventional brazing sheet has insufficient wettability, the gap between the brazing sheets made of aluminum or aluminum alloy to be brazed is sufficiently filled with the brazing material. Is difficult,
Brazing defects may occur.
【０００５】また、近時、熱交換器の形状が複雑化して
いるため、平面同士のろう付接合ではなく、ろう付接合
部の形状が複雑化している。このように、製品の形状が
複雑になるほど、ろう付けされるブレージングシート間
の間隙が一定ではなくなるため、ろう付欠陥が発生しや
すくなる。更に、従来のろう材を使用すると、ろう付け
時に、例えばろう付温度の低温部又は真空度の増大等の
ろう付条件によっては、ろう付欠陥が発生しやすくなる
という問題点がある。In recent years, since the shape of the heat exchanger has become more complicated, the shape of the brazed joint, not the brazed joint between the planes, has been complicated. Thus, as the shape of the product becomes more complicated, the gap between the brazing sheets to be brazed is not constant, so that a brazing defect is more likely to occur. Furthermore, when a conventional brazing material is used, there is a problem that a brazing defect is likely to occur during brazing depending on brazing conditions such as a low brazing temperature portion or an increase in the degree of vacuum.
【０００６】本発明はかかる問題点に鑑みてなされたも
のであって、ろう材のぬれ性能が高く、真空ろう付性が
優れたアルミニウム合金製ブレージングシートを提供す
ることを目的とする。The present invention has been made in view of the above problems, and has as its object to provide an aluminum alloy brazing sheet having high wettability of a brazing material and excellent vacuum brazing properties.
【０００７】[0007]
【課題を解決するための手段】本発明に係るアルミニウ
ム合金製ブレージングシートは、アルミニウム又はアル
ミニウム合金からなる心材と、この心材の少なくとも一
方の面上にクラッドされたアルミニウム合金からなるろ
う材とを有するブレージングシートにおいて、心材の少
なくとも一方の面上のろう材は、Ｓｉ：７乃至１５質量
％及びＭｇ：０．５乃至２質量％を含有し、残部がアル
ミニウム及び不可避的不純物からなる組成を有し、前記
ろう材の単位面積当たりのＭｇ量が１乃至３ｇ／ｍ2で
あることを特徴とする。An aluminum alloy brazing sheet according to the present invention has a core material made of aluminum or an aluminum alloy, and a brazing material made of an aluminum alloy clad on at least one surface of the core material. In the brazing sheet, the brazing material on at least one surface of the core material contains Si: 7 to 15% by mass and Mg: 0.5 to 2% by mass, with the balance being aluminum and unavoidable impurities. The amount of Mg per unit area of the brazing material is 1 to 3 g / m 2 .
【０００８】本発明においては、前記ろう材は、更に、
Ｂｉ：０．０３乃至０．２質量％、Ｓｒ：０．０３乃至
０．３質量％、及びＢａ：０．０２乃至０．２質量％か
らなる群から選択された１種又は２種以上の金属を含有
してもよい。[0008] In the present invention, the brazing material further comprises:
Bi: 0.03 to 0.2% by mass, Sr: 0.03 to 0.3% by mass, and Ba: 0.02 to 0.2% by mass. It may contain a metal.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施例について詳
細に説明する。本願発明者等は上述の課題を解決すべく
鋭意実験研究した結果、ろう付時において、ろう材の表
面酸化皮膜の破壊作用を適正化させるためには、ろう材
への添加量としてのＭｇ含有量だけではなく、クラッド
厚さを考慮し、Ｍｇの総量を制御する必要があることを
知見した。また、ろう材の表面張力を適切に低下させ、
ろう材のぬれ性を向上させると共に、更に、ろう材を均
一に溶解させてろう材の流動性を最適化することによ
り、ろう材及びアルミニウム合金ブレージングシートの
ろう付性を向上させることができることを見出した。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. The inventors of the present application have conducted intensive experiments and researches to solve the above-mentioned problems. As a result, in order to optimize the destruction effect of the surface oxide film of the brazing material at the time of brazing, the content of Mg as an addition amount to the brazing material was determined. It has been found that it is necessary to control the total amount of Mg in consideration of not only the amount but also the cladding thickness. Also, appropriately reduce the surface tension of the brazing material,
Along with improving the wettability of the brazing material and further optimizing the flowability of the brazing material by uniformly dissolving the brazing material, it is possible to improve the brazing properties of the brazing material and the aluminum alloy brazing sheet. I found it.
【００１０】本発明のブレージングシートは、Ａｌ又は
Ａｌ合金からなる心材の一方又は両面上に心材がクラッ
ドされている。そして、少なくとも一方のろう材は、Ｓ
ｉ及びＭｇを所定の量含有し、更に必要に応じてＢｉ、
Ｓｒ及びＢａのうち１種以上を適切な量含有するＡｌ合
金からなり、且つ、ろう材の単位面積当たりのＭｇ量が
１乃至３ｇ／ｍ2となるようにクラッドされている。[0010] The brazing sheet of the present invention has a core material clad on one or both sides of a core material made of Al or an Al alloy. And at least one brazing material is S
i and Mg are contained in predetermined amounts, and if necessary, Bi,
It is made of an Al alloy containing an appropriate amount of at least one of Sr and Ba, and is clad so that the amount of Mg per unit area of the brazing material is 1 to 3 g / m 2 .
【００１１】以下、本発明に係るアルミニウム合金製ブ
レージングシートのろう材に含有する化学成分及び数値
理由について説明する。The chemical components contained in the brazing material of the aluminum alloy brazing sheet according to the present invention and the numerical reasons will be described below.
【００１２】ろう材のＳｉ含有量：７乃至１５質量％ Ｓｉは、Ａｌと共存して低融点化するため、良好な流動
性を有するろう材を得るための基本成分である。ろう材
中のＳｉ含有量が７質量％未満であると、ろう材の融点
が高くなり、所定の流動性を得ることができず、ろう付
性が低下する。一方、ろう材中のＳｉが１５質量％を超
えると、融点が高くなり、所定の流動性を得ることがで
きない。また、粗大な初晶Ｓｉが生成されるため、加工
性が阻害される。従って、ろう材のＳｉ含有量は７乃至
１５質量％とする。 Si content of brazing material: 7 to 15% by mass Si is a basic component for obtaining a brazing material having good fluidity because it coexists with Al and lowers the melting point. If the Si content in the brazing material is less than 7% by mass, the melting point of the brazing material will be high, and a predetermined fluidity cannot be obtained, and the brazing property will be reduced. On the other hand, when Si in the brazing filler metal exceeds 15% by mass, the melting point becomes high, and a predetermined fluidity cannot be obtained. Further, since coarse primary crystal Si is generated, workability is impaired. Therefore, the Si content of the brazing material is set to 7 to 15% by mass.
【００１３】ろう材のＭｇ含有量：０．５乃至２質量
％、且つ、ろう材単位面積当たりのＭｇ量が１乃至３ｇ
／ｍ2 Ｍｇはろう材中に添加されることにより、ろう付時に蒸
発し、表面の酸化皮膜を破壊し、ろうのぬれ性を向上さ
せる。また、蒸発したＭｇは、炉内に残留して水及び酸
素と結合するゲッター作用により真空度を向上させ、ろ
う付性を向上させる。ろう材中のＭｇ含有量が０．５質
量％未満及びろう材の単位面積当たりのＭｇ量が１ｇ／
ｍ2未満であると、前記ぬれ性向上効果及びゲッター作
用が十分得られない。一方、Ｍｇ含有量が２質量％を超
え、且つ、ろう材の単位面積当たりのＭｇ量が３ｇ／ｍ
2を超えると、ぬれ性向上効果及びゲッター作用が飽和
するばかりでなく、熱交換器の半密閉空間内面部におい
てはろう付部にＭｇ系の酸化皮膜が増加してしまうた
め、ろう付性を低下させる。従って、ろう材中のＭｇ含
有量は０．５乃至２質量％、且つ一方のろう材の単位面
積当たりのＭｇ量が１乃至３ｇ／ｍ2とする。[0013] Mg content of brazing material: 0.5 to 2 mass
% And the amount of Mg per unit area of brazing material is 1 to 3 g
When added to the brazing material, / m 2 Mg evaporates during brazing, destroys the oxide film on the surface, and improves the wettability of the brazing material. Further, the evaporated Mg remains in the furnace and improves the degree of vacuum by the getter function of combining with water and oxygen, thereby improving the brazing property. The Mg content in the brazing material is less than 0.5% by mass, and the Mg content per unit area of the brazing material is 1 g / g.
If it is less than m 2 , the effect of improving the wettability and the getter function cannot be sufficiently obtained. On the other hand, the Mg content exceeds 2% by mass, and the Mg content per unit area of the brazing filler metal is 3 g / m2.
If it exceeds 2 , not only the wettability improving effect and the getter function will be saturated, but also the Mg-based oxide film will increase at the brazing portion on the inner surface of the semi-enclosed space of the heat exchanger, so that the brazing property will be reduced. Lower. Therefore, the Mg content in the brazing material is 0.5 to 2% by mass, and the Mg content per unit area of one brazing material is 1 to 3 g / m 2 .
【００１４】このようなろう材の単位面積当たりのＭｇ
量は、ろう材のＭｇ含有量及びろう材のクラッド率によ
って調節することができる。[0014] Mg per unit area of such brazing material
The amount can be adjusted by the Mg content of the brazing material and the cladding ratio of the brazing material.
【００１５】Ｂｉ：０．０３乃至０．２質量％ Ｂｉはろう材中に添加されることにより、ろうの流動性
を向上させ、また、ろう材の表面張力を低下させる効果
を有し、これにより、ぬれ性を向上させてろう付性を向
上させることができる。しかし、ろう材中のＢｉ含有量
が０．０３質量％未満であると、前記作用が十分でな
く、０．２質量％を超えると、前記ろう付性を向上させ
る作用が飽和すると共に、原料コストの上昇を招く。ま
た、ろう材の加工性が劣化する。従って、ろう材中のＢ
ｉ含有量は０．０３乃至０．２質量％とする。 Bi: 0.03 to 0.2% by mass Bi is added to the brazing filler metal, thereby improving the fluidity of the brazing filler metal and lowering the surface tension of the brazing filler metal. Thereby, the wettability can be improved and the brazing property can be improved. However, if the Bi content in the brazing material is less than 0.03% by mass, the above effect is not sufficient. If the Bi content exceeds 0.2% by mass, the effect of improving the brazing property is saturated, and This leads to higher costs. In addition, the workability of the brazing material deteriorates. Therefore, B in the brazing material
The i content is 0.03 to 0.2% by mass.
【００１６】Ｓｒ：０．０３乃至０．３質量％ Ｓｒはろう材に添加することにより、ろう材中の共晶Ｓ
ｉを微細化する効果を有する。共晶Ｓｉが微細化される
ことにより、ろう付時にろう材が均一に溶解するので、
ろう付性を向上させることができる。しかし、ろう材中
のＳｒ含有量が０．０３質量％未満であると、上記作用
を得られない。一方、Ｓｒ含有量が０．３質量％を超え
ると、ろう材中の共晶Ｓｉを微細化する効果が飽和し、
ろう付性を向上させる効果が飽和し、原料コストの上昇
を招く。また、粗大な化合物が生成してろう材の加工性
が阻害されることがある。従って、ろう材中のＳｒ含有
量は、０．０３乃至０．３質量％とする。 Sr: 0.03 to 0.3% by mass Sr is added to the brazing filler metal to form eutectic S in the brazing filler metal.
This has the effect of miniaturizing i. Since the eutectic Si is refined, the brazing material is uniformly dissolved during brazing,
Brazing property can be improved. However, if the Sr content in the brazing material is less than 0.03% by mass, the above effect cannot be obtained. On the other hand, if the Sr content exceeds 0.3% by mass, the effect of refining eutectic Si in the brazing filler metal is saturated,
The effect of improving the brazing property is saturated, which leads to an increase in raw material costs. In addition, a coarse compound may be formed, thereby impairing the workability of the brazing material. Therefore, the Sr content in the brazing material is set to 0.03 to 0.3% by mass.
【００１７】Ｂａ：０．００５乃至０．２質量％ 本願発明者等は、Ｂａは、ろう材に添加することによ
り、ろう材の表面張力を大きく低下させる効果を有して
いることを知見し、これにより、ぬれ性を向上させてろ
う付性を向上させることができることを見出した。ろう
材中のＢａ含有量が０．００５質量％未満では、上記作
用が十分でなく、０．２質量％を超えると、ろう付性を
向上させる効果が飽和すると共に原料コストの上昇を招
く。従って、ろう材中のＢａ含有量は０．００５乃至
０．２質量％とする。 Ba: 0.005 to 0.2% by mass The present inventors have found that Ba has an effect of greatly reducing the surface tension of the brazing material by being added to the brazing material. Thereby, it was found that the wettability can be improved and the brazing property can be improved. If the content of Ba in the brazing material is less than 0.005% by mass, the above effect is not sufficient. If the content exceeds 0.2% by mass, the effect of improving the brazing property is saturated and the cost of the raw material is increased. Therefore, the content of Ba in the brazing material is set to 0.005 to 0.2% by mass.
【００１８】なお、本発明において、ろう材中の規定成
分の効果を損ねない程度の範囲でろう材中に不純物が含
有されていてもよい。例えば、Ｆｅは通常、アルミニウ
ム地金中に不純物として含有される。特に、本発明のア
ルミニウム合金からなるろう材は、Ｓｉ含有量が高いＡ
ｌ−Ｓｉ合金からなるものであるので、Ｓｉ地金からろ
う材中にＦｅが大量に混入する。通常、Ｓｉを７乃至１
５質量％含有するアルミニウム合金中には、Ｆｅが約
０．３質量％程度含有されており、本発明においても、
Ｆｅ含有量が０．８質量％以下であれば、本発明の効果
に悪影響を及ぼさない。In the present invention, the brazing material may contain impurities to such an extent that the effects of the specified components in the brazing material are not impaired. For example, Fe is usually contained as an impurity in aluminum ingots. In particular, the brazing material made of the aluminum alloy of the present invention has a high Si content of A
Since it is made of an l-Si alloy, a large amount of Fe is mixed into the brazing material from the Si base metal. Usually, 7 to 1 of Si
In an aluminum alloy containing 5% by mass, about 0.3% by mass of Fe is contained.
If the Fe content is 0.8% by mass or less, the effects of the present invention are not adversely affected.
【００１９】[0019]
【実施例】以下、本発明のアルミニウム合金製ブレージ
ングシートを実際に製造し、本発明範囲から外れる比較
例と比較してその効果について説明する。EXAMPLES The aluminum alloy brazing sheet of the present invention is actually manufactured, and its effect will be described in comparison with a comparative example out of the scope of the present invention.
【００２０】先ず、下記表１に示す組成のＪＩＳ ３０
０３合金からなる心材の両面に、下記表２及び表３の化
学組成を有し、残部がアルミニウムからなるアルミニウ
ム合金のろう材を用意し、このろう材のクラッド率及び
心材板厚を調整することにより、両面に形成した各ろう
材の単位面積当たりのＭｇ量が下記表２に示す値になる
ろう材を有し、板厚が０．４ｍｍであるＯ材のブレージ
ングシートを製造した。First, JIS 30 having the composition shown in Table 1 below was used.
Prepare a brazing material of an aluminum alloy having the chemical composition shown in Tables 2 and 3 below on both sides of a core material made of 03 alloy, and adjusting the cladding rate and core material plate thickness of the brazing material. As a result, a brazing sheet of an O material having a thickness of 0.4 mm having a brazing material in which the Mg amount per unit area of each brazing material formed on both surfaces was a value shown in Table 2 below was manufactured.
【００２１】次に、このブレージングシートを所定のサ
イズに切断し、プレス成形することにより、ろう付試験
用のカップ試験片を作製した。図１（ａ）は、ろう付用
のカップ試験片の成形形状及びサイズを示す平面図であ
り、（ｂ）はその断面図である。図１（ａ）及び図１
（ｂ）に示すように、カップ試験片１は、容器部分とな
る直径３３ｍｍの円形の凹部１０の底面に直径１０ｍｍ
の穴１１を形成し、凹部１０の縁部周囲にへり１２を形
成して凹部１０の底面側へ折り曲げた。ろう付けされる
凹部１０の縁部からへりの折り曲げ部までの距離が４ｍ
ｍ、また、へり１２の折り曲げ部１３の長さは３ｍｍと
した。Next, the brazing sheet was cut into a predetermined size and press-molded to produce a cup test piece for a brazing test. FIG. 1A is a plan view showing a molded shape and a size of a cup test piece for brazing, and FIG. 1B is a sectional view thereof. FIG. 1A and FIG.
As shown in (b), the cup test piece 1 has a diameter of 10 mm on the bottom surface of a circular concave portion 10 having a diameter of 33 mm serving as a container portion.
Hole 11 was formed, and a lip 12 was formed around the edge of the recess 10 and bent toward the bottom side of the recess 10. The distance from the edge of the recess 10 to be brazed to the bent portion of the edge is 4 m.
m, and the length of the bent portion 13 of the edge 12 was 3 mm.
【００２２】図２（ａ）は、ろう付け時の組立形状を示
す模式的断面図、図２（ｂ）は、図２（ａ）のろう付時
の接合部Ａを拡大して示す模式的断面図である。カップ
試験片１の形成後、図２（ａ）に示すように、得られた
カップ試験片１同士のへり１２を重ね合わせ、真空度１
×１０-2Ｐａ、６０５℃の温度に加熱し、カップ試験片
１の温度を６０５℃に加熱した状態で３分間保持するこ
とにより、ろう付熱処理を実施した。その後、ろう付に
より、得られたカップろう付材の接合部Ａについて、ろ
う付性を評価した。評価は、図２（ｂ）に示すように、
カップ内面側接合部１４及び外面側接合部１５のフィレ
ットの形成状態（フィレット巾Ｌ）を金属顕微鏡で断面
観察し、フィレット幅Ｌを測定して行った。内面及び外
面共にフィレット巾Ｌが０．５ｍｍ以上であったものの
総合評価を良好（○）とし、内面又は外面の内いずれか
一方でもフィレット巾Ｌが０．５ｍｍ未満であったもの
は、不良（×）とした。これらの評価結果を下記表４及
び表５に示す。FIG. 2A is a schematic cross-sectional view showing an assembled shape at the time of brazing, and FIG. 2B is an enlarged schematic view showing a joint A at the time of brazing of FIG. 2A. It is sectional drawing. After forming the cup test piece 1, as shown in FIG. 2A, the rims 12 of the obtained cup test pieces 1 are overlapped with each other, and the degree of vacuum 1
A brazing heat treatment was performed by heating the cup test piece 1 to a temperature of 605 ° C. for 3 minutes while heating to 10 −2 Pa and 605 ° C. Thereafter, the brazing property was evaluated for the joint A of the obtained cup brazing material by brazing. The evaluation was performed as shown in FIG.
The formation state (fillet width L) of the fillet of the inner joint portion 14 and the outer joint portion 15 of the cup was observed by cross-section with a metallographic microscope, and the fillet width L was measured. When the fillet width L was 0.5 mm or more on both the inner surface and the outer surface, the overall evaluation was evaluated as good (○). When the fillet width L was less than 0.5 mm on either the inner surface or the outer surface, X). The evaluation results are shown in Tables 4 and 5 below.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【表２】 [Table 2]
【００２５】[0025]
【表３】 [Table 3]
【００２６】[0026]
【表４】 [Table 4]
【００２７】[0027]
【表５】 [Table 5]
【００２８】表４に示すように、実施例１乃至２３は、
ろう材の組成が本発明範囲内であり、且つろう材の単位
面積当たりのＭｇ量が本発明範囲内であるので、カップ
の内外面共にフィレット形成は良好であり、優れたろう
付性を示した。ここで、実施例９乃至２３は、ろう材中
にＢｉ、Ｓｒ、Ｂａが含有されており、その含有量が本
発明範囲内であるので、フィレット形成は更に良好とな
り、優れたろう付性を示した。例えば、実施例９及び１
０は、実施例３の組成に更にＢｉが添加されているた
め、実施例１３及び１４は、実施例３の組成に更にＳｒ
が添加されているため、また、実施例１６及び１７は、
実施例３の組成に更にＢａが添加されているため、夫々
実施例３と比べて、ろう付性が更に向上している。As shown in Table 4, Examples 1 to 23
Since the composition of the brazing material was within the range of the present invention and the amount of Mg per unit area of the brazing material was within the range of the present invention, the fillet formation was good on both the inner and outer surfaces of the cup, and excellent brazing properties were exhibited. . Here, in Examples 9 to 23, since Bi, Sr, and Ba were contained in the brazing material and the contents were within the range of the present invention, the fillet formation was further improved, and excellent brazing properties were exhibited. Was. For example, Examples 9 and 1
0 indicates that Bi was further added to the composition of Example 3;
Are added, and Examples 16 and 17
Since Ba was further added to the composition of Example 3, the brazing property was further improved as compared with Example 3, respectively.
【００２９】一方、比較例２４及び２５は、ろう材中の
Ｓｉ含有量が本発明範囲から外れているため、流動性が
低下して良好なろう付性を得ることができなかった。比
較例２６及び２７は、ろう材中のＭｇ含有量が本発明範
囲から外れているため、良好なろう付特性を得ることが
できなかった。On the other hand, in Comparative Examples 24 and 25, since the Si content in the brazing material was out of the range of the present invention, the fluidity was lowered and good brazing properties could not be obtained. In Comparative Examples 26 and 27, since the Mg content in the brazing material was outside the range of the present invention, good brazing characteristics could not be obtained.
【００３０】比較例２８及び２９は、Ｂｉ及びＳｒの含
有量が本発明範囲の上限を超えているため、ろう材板作
製時の圧延加工性が低下し、正常なろう材が作製できな
かった。In Comparative Examples 28 and 29, since the contents of Bi and Sr exceeded the upper limit of the range of the present invention, the rollability at the time of producing the brazing material plate was reduced, and a normal brazing material could not be produced. .
【００３１】比較例３０乃至３９は、ろう材の組成は本
発明範囲内であるが、一方のろう材の単位面積当たりの
Ｍｇ量が本発明範囲から外れるため、良好なろう付性を
得ることができなかった。In Comparative Examples 30 to 39, although the composition of the brazing material was within the range of the present invention, the amount of Mg per unit area of one brazing material was out of the range of the present invention, so that good brazing property was obtained. Could not.
【００３２】[0032]
【発明の効果】以上、詳述したように、本発明によれ
ば、ろう材中の化学成分及び組成を適正量に規定し、且
つ、ろう材の単位面積当たりのＭｇ量が適切に規制され
ているので、ブレージングシートのろう付け時に、ろう
材のぬれ性能が高く、真空ろう付性が優れている。ま
た、ろう材中に所定量のＢｉ、Ｓｒ、及びＢａを含有さ
せると、ろう付性を更に高めることができる。As described in detail above, according to the present invention, the chemical composition and composition in the brazing material are regulated to appropriate amounts, and the amount of Mg per unit area of the brazing material is appropriately regulated. Therefore, when brazing the brazing sheet, the brazing material has high wettability and excellent vacuum brazing properties. Further, when a predetermined amount of Bi, Sr, and Ba is contained in the brazing material, the brazing property can be further improved.
【図１】（ａ）は、ろう付用のカップ試験片の成形形状
及びサイズを示す平面図であり、（ｂ）はその断面図で
ある。FIG. 1A is a plan view showing a molded shape and a size of a cup test piece for brazing, and FIG. 1B is a cross-sectional view thereof.
【図２】（ａ）は、ろう付け時の組立形状を示す模式的
断面図、（ｂ）はろう付時の接合部を拡大して示す模式
的断面図である。2A is a schematic cross-sectional view showing an assembled shape at the time of brazing, and FIG. 2B is a schematic cross-sectional view showing an enlarged joint at the time of brazing.
１；カップ型試験片 １０；凹部 １１；穴 １２；へり １３；折り曲げ部 １４；内面側接合部 １５；外面側接合部 1; cup-shaped test piece 10; concave portion 11; hole 12; lip 13; bent portion 14; inner surface side joint portion 15; outer surface side joint portion
Claims (2)
なる心材と、この心材の少なくとも一方の面上にクラッ
ドされたアルミニウム合金からなるろう材とを有するブ
レージングシートにおいて、心材の少なくとも一方の面
上のろう材は、Ｓｉ：７乃至１５質量％及びＭｇ：０．
５乃至２質量％を含有し、残部がアルミニウム及び不可
避的不純物からなる組成を有し、前記ろう材の単位面積
当たりのＭｇ量が１乃至３ｇ／ｍ2であることを特徴と
するアルミニウム合金製ブレージングシート。1. A brazing sheet having a core material made of aluminum or an aluminum alloy and a brazing material made of an aluminum alloy clad on at least one surface of the core material, wherein the brazing material on at least one surface of the core material is , Si: 7 to 15% by mass and Mg: 0.1% by mass.
An aluminum alloy containing 5 to 2% by mass, the balance being composed of aluminum and unavoidable impurities, wherein the amount of Mg per unit area of the brazing material is 1 to 3 g / m 2 . Brazing sheet.
至０．２質量％、Ｓｒ：０．０３乃至０．３質量％、及
びＢａ：０．０２乃至０．２質量％からなる群から選択
された１種又は２種以上の金属を含有することを特徴と
する請求項１に記載のアルミニウム合金製ブレージング
シート。2. The brazing material further comprises Bi: 0.03 to 0.2% by mass, Sr: 0.03 to 0.3% by mass, and Ba: 0.02 to 0.2% by mass. The brazing sheet made of an aluminum alloy according to claim 1, comprising one or more metals selected from the group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000119669A JP3736608B2 (en) | 2000-04-20 | 2000-04-20 | Aluminum alloy brazing sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000119669A JP3736608B2 (en) | 2000-04-20 | 2000-04-20 | Aluminum alloy brazing sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001303161A true JP2001303161A (en) | 2001-10-31 |
| JP3736608B2 JP3736608B2 (en) | 2006-01-18 |
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ID=18630601
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|---|---|---|---|
| JP2000119669A Expired - Lifetime JP3736608B2 (en) | 2000-04-20 | 2000-04-20 | Aluminum alloy brazing sheet |
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| JP2008248361A (en) * | 2007-03-30 | 2008-10-16 | Furukawa Sky Kk | Aluminum alloy brazing sheet |
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