JP3601238B2 - Mixed powder for brazing Al or Al alloy - Google Patents
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Description
【０００１】
【発明の属する技術分野】
この発明は、ＡｌまたはＡｌ合金をろう付けするために使用する混合粉末およびこの混合粉末を含むろう材に関するものである。
【０００２】
【従来の技術】
従来、ＡｌまたはＡｌ合金製品をろう付けするには、Ｓｉ：６．８〜１３．０重量％を含むＡｌ−Ｓｉ系合金のろう材が使用されることは知られており、これらＡｌ−Ｓｉ系合金のろう材を粉末に成形し、このろう材粉末にフラックスを混合したり、バインダ樹脂および溶剤と共に混合してスラリー状にしたものをＡｌまたはＡｌ合金製品の接合個所に塗布して不活性ガス雰囲気下で加熱することによりろう付けすることも行われている。ろう材粉末は複雑形状品などの構造的にろう付けが困難な個所にも容易に適用できる利点を有しているものの、大きな隙間のある接合部（例えば、熱交換器のチューブとヘッダーの接合部など）や大きなフィレットの形成が必要な接合部などでは、ろう付けに必要なろう材量を著しく増す必要があり、そのために、従来はろう材粉末の塗布量を増加することで対処してきた。
【０００３】
【発明が解決しようとする課題】
しかし、ろう材粉末を一度のコート（フローコート法）で塗布できる塗布量には限界があり、ろう材粉末の塗布量を増加するには重ね塗りが必要となり、塗布回数の増加は高価なろう材粉末の使用量の増加と共にろう付け時間の増加をもたらし、製造コストの増加の原因になっていた。
【０００４】
【課題を解決するための手段】
そこで、本発明者等は、上述のような観点から、少量でろう付け可能なろう材粉末を開発すべく研究を行なった結果、
（ａ）重量％で、Ｓｉ：１３〜４５％を含み、残りがＡｌと不可避不純物からなる組成のＡｌ−Ｓｉ二元系過共晶合金粉末とＳｉ粉末からなる混合粉末であって、この混合粉末に含まれるＡｌ−Ｓｉ二元系過共晶合金粉末とＳｉ粉末はＳｉ量が合計で１５〜６０％となるように混合されている混合粉末で構成されたろう付け用混合粉末から得られたろう材粉末は、これを用いてＡｌまたはＡｌ合金をろう付けすると、比較的少量でろう付けすることができる、
（ｂ）前記Ｓｉ粉末の融点は前記Ａｌ−Ｓｉ二元系過共晶合金粉末の融点よりも高いこと、またＳｉ粉末は母材への侵食が著しいため、塗布面全体に均一に塗布する必要があることから、Ｓｉ粉末の粒径はＡｌ−Ｓｉ二元系過共晶合金粉末の粒径よりも微細にすることが好ましく、したがって、Ａｌ−Ｓｉ二元系過共晶合金粉末の平均粒径は５〜１００μｍの範囲内にあり、前記Ｓｉ粉末の平均粒径は１〜５０μｍの範囲内にあり、かつＡｌ−Ｓｉ二元系過共晶合金粉末の平均粒径はＳｉ粉末の平均粒径よりも相対的に大きい平均粒径を有するようにする必要がある、という研究結果を得たのである。
【０００５】
この発明は、上記の研究結果にもとづいてなされたものであり、
（１）重量％で、Ｓｉ：１３〜４５％を含み、残りがＡｌと不可避不純物からなる組成を有するＡｌ−Ｓｉ二元系過共晶合金粉末とＳｉ粉末からなる混合粉末で構成されたＡｌまたはＡｌ合金ろう付け用混合粉末、
（２）重量％で、Ｓｉ：１３〜４５％を含み、残りがＡｌと不可避不純物からなる組成のＡｌ−Ｓｉ二元系過共晶合金粉末とＳｉ粉末からなる混合粉末であって、この混合粉末に含まれるＡｌ−Ｓｉ二元系過共晶合金粉末とＳｉ粉末はＳｉ量が合計で１５〜６０％となるように混合されているＡｌまたはＡｌ合金ろう付け用混合粉末、
（３）前記Ａｌ−Ｓｉ二元系過共晶合金粉末の平均粒径は５〜１００μｍの範囲内にあり、前記Ｓｉ粉末の平均粒径は１〜５０μｍの範囲内にあり、かつＡｌ−Ｓｉ二元系過共晶合金粉末の平均粒径はＳｉ粉末の平均粒径よりも相対的に大きい平均粒径を有する前記（１）または（２）記載のＡｌまたはＡｌ合金ろう付け用混合粉末、に特徴を有するものである。
【０００６】
前記（１）、（２）または（３）記載のＡｌまたはＡｌ合金ろう付け用混合粉末は、フラックスを混合したり、バインダ樹脂および溶剤と共に混合してスラリー状にして使用することができる。したがって、この発明は、
（４）前記（１）、（２）または（３）記載のＡｌまたはＡｌ合金ろう付け用混合粉末をフラックスと混合してなるＡｌまたはＡｌ合金ろう材、
（５）前記（１）、（２）または（３）記載のＡｌまたはＡｌ合金ろう付け用混合粉末にバインダ樹脂および溶剤と共に混合してスラリー状にしてなるＡｌまたはＡｌ合金ろう材、に特徴を有するものである。
【０００７】
この発明のＡｌまたはＡｌ合金ろう付け用混合粉末に含まれるＡｌ−Ｓｉ二元系過共晶合金粉末のＳｉ含有量が１３〜４５％の範囲内にあるＡｌ−Ｓｉ二元系過共晶合金粉末であると、共晶あるいは過共晶となって母材に対する侵蝕が過度になることなく十分に母材を溶解させるることができる。この発明のＡｌまたはＡｌ合金ろう付け用混合粉末に含まれるＡｌ−Ｓｉ二元系過共晶合金粉末のＳｉ含有量は１５〜４５％の範囲であることが一層好ましく、２０〜３０％の範囲であることがさらに一層好ましい。
【０００８】
この発明のＡｌまたはＡｌ合金ろう付け用混合粉末は、さらにＳｉ粉末を含むが、Ｓｉ粉末は、前記Ａｌ−Ｓｉ二元系過共晶合金粉末に対してＳｉの合計量が１５〜６０％となるように混合されることが好ましく、Ｓｉ粉末がＡｌ−Ｓｉ二元系過共晶合金粉末に対してＳｉ量の合計で１５％未満含有する混合粉末からなるろう材では母材を溶解させる作用が十分得られず、一方、Ｓｉ量が合計で６０％を越えて含有する混合粉末からなるろう材では母材に対する侵蝕が過度になり、強度低下の原因になって好ましくない。したがって、この発明のＡｌまたはＡｌ合金ろう付け用混合粉末はＳｉ粉末をＡｌ−Ｓｉ二元系過共晶合金粉末に対してＳｉの合計量が１５〜６０％となるように定めた。Ｓｉ粉末は、Ｓｉ量の合計で２０〜４５％の範囲であることが一層好ましく、２５〜３５％の範囲であることがさらに一層好ましい。
【０００９】
この発明のＡｌまたはＡｌ合金ろう付け用混合粉末に含まれるＳｉ粉末はＡｌ−Ｓｉ二元系過共晶合金粉末よりも融点が高いところから、Ｓｉ粉末の粒径をＡｌ−Ｓｉ二元系過共晶合金粉末の粒径よりも微細にし、ＡｌまたはＡｌ合金ろう付け用混合粉末中に均一に分散させると共にＳｉ粉末による局部侵蝕を低減し、母材表面の侵蝕を穏やかにする必要がある。したがって、この発明のＡｌまたはＡｌ合金ろう付け用混合粉末は、Ａｌ−Ｓｉ二元系過共晶合金粉末の平均粒径は５〜１００μｍの範囲内にあり、Ｓｉ粉末の平均粒径は１〜５０μｍの範囲内にあり、かつＡｌ−Ｓｉ二元系過共晶合金粉末の平均粒径はＳｉ粉末の平均粒径よりも相対的に大きい平均粒径を有することが好ましい。この発明のＡｌまたはＡｌ合金ろう付け用混合粉末に含まれるＡｌ−Ｓｉ二元系過共晶合金粉末の平均粒径は１０〜７０μｍの範囲内にあり、Ｓｉ粉末の平均粒径は１〜３０μｍの範囲内にあり、かつＡｌ−Ｓｉ二元系過共晶合金粉末の平均粒径はＳｉ粉末の平均粒径よりも相対的に大きい平均粒径を有することが一層好ましい。さらに一層好ましい範囲は、Ａｌ−Ｓｉ二元系過共晶合金粉末の平均粒径が１５〜４０μｍの範囲内にあり、Ｓｉ粉末の平均粒径は１〜２０μｍの範囲内にありかつＡｌ−Ｓｉ二元系過共晶合金粉末の平均粒径はＳｉ粉末の平均粒径よりも相対的に大きい平均粒径を有することがさらに一層好ましい。
【００１０】
この発明のＡｌまたはＡｌ合金ろう付け用混合粉末を使用することによりろう材粉末の使用量を減らすことができる理由として、Ａｌ−Ｓｉ二元系過共晶合金粉末とＳｉ粉末からなる混合粉末は、全体としてＳｉ過剰の過共晶合金粉末となっているので、ろう付け時にＳｉが母材に拡散流入し、母材の融点を低下させて母材の一部を溶融侵蝕し、この溶融侵蝕した母材の一部が塗布された混合粉末と共に流動し、これが接合部の隙間を充填したりフィレットを形成することによるものと考えられる。
【００１１】
この発明のＡｌまたはＡｌ合金ろう付け用混合粉末はＳｉ粉末を含むため、Ｓｉ粉末がろうとなってフィレットを形成する前に母材深さ方向への侵蝕が著しく、母材厚さが極端に薄いと腐食による貫通孔が発生することがある。したがって、この発明のＡｌ−Ｓｉ二元系過共晶合金粉末とＳｉ粉末からなる混合粉末で構成するＡｌまたはＡｌ合金ろう付け用混合粉末は、板厚さが０．５ｍｍ以上の比較的厚いＡｌまたはＡｌ合金板のろう付けに特に適している。
【００１２】
【発明の実施の形態】
つぎに、この発明のろう付け用混合粉末を実施例により具体的に説明する。
表１および２に示される成分組成をもったＡｌ合金製溶湯をアトマイズして、表１および２に示される平均粒径を有するＡｌ−Ｓｉ二元系合金粉末を作製し、これらＡｌ−Ｓｉ二元系合金粉末に対して表１および２に示される平均粒径を有する純Ｓｉ粉末を表１および２に示される割合に配合し、混合してＳｉ量が合計で表１および２に示される値となる本発明ろう付け用混合粉末（以下、本発明混合粉末という）１〜８および比較ろう付け用混合粉末（以下、比較混合粉末という）１〜５を作製した。さらに、Ａｌ−Ｓｉ二元系合金粉末からなる純Ｓｉ粉末を含まない従来粉末を用意した。これら本発明混合粉末１〜８、比較混合粉末１〜５および従来粉末を１０重量部に対してフラックス：１重量部、バインダー：１重量部の割合で混合し、スラリー状ろう材を作製した。なお、比較混合粉末１〜５は、構成成分のうちのいずれかの成分含有量がこの発明の範囲から外れたものである。
【００１３】
さらに、ＪＩＳ Ａ３００３からなる縦：３０ｍｍ、横：５０ｍｍ、板厚：１ｍｍの寸法を有する垂直板を用意し、さらに縦：３０ｍｍ、横：６０ｍｍ、板厚：１．５ｍｍの寸法を有する水平板を用意し、図１に示されるように垂直板１と水平板２を一端に直径：２ｍｍのスペーサー３を挟んで逆Ｔ字型に組み立て、垂直板１にスラリー状ろう材を塗布した後、これを不活性ガス雰囲気中、温度：６００℃に５分間保持してろう付けし、図２に示されるろう付け部の充填長さＬが３０ｍｍのフィレット４を有する逆Ｔ字型ろう付け組立体を作製した。
【００１４】
この充填長さＬがいずれも３０ｍｍの逆Ｔ字型ろう付け組立体を作製するために要したろう材の塗布量を測定し、それらの結果を表１および２に示したのち、さらに図２のＡ−Ａ断面である図３に示されるろう付け部のフィレット４の最大侵蝕深さＨを測定し、それらの結果も表１および２に示した。
【００１５】
【表１】
【表２】
【発明の効果】
表１，２に示される結果から、本発明混合粉末１〜８で作製したろう材の塗布量は、従来粉末で作製したろう材の塗布量に比べて格段に少ないことが分かる。さらにＳｉ粉末の含有量がこの発明の範囲よりも多い比較混合粉末１で作製したろう材の最大侵食深さは大きくなり過ぎて好ましくなく、またＳｉ粉末の含有量がこの発明の範囲よりも少ない比較混合粉末２で作製したろう材は塗布量が多くなって好ましくなく、Ａｌ−Ｓｉ二元系合金粉末およびＳｉ粉末の粒径がこの発明の範囲から外れている比較混合粉末３および４は、塗布量が多くなるかまたは最大侵蝕深さが大きくなり過ぎるので好ましくなく、さらにＳｉ粉末の含有量が多量となる比較混合粉末５で構成したろう材は最大侵蝕深さが大きくなり過ぎて好ましくないことが分かる。
【００１８】
上述のように、この発明のＡｌまたはＡｌ合金ろう付け用混合粉末を含むろう材は、少ないろう材で隙間を充填することができ、ろう付け部品の軽量化をはかることができ、工業上有用な効果をもたらすものである。
【図面の簡単な説明】
【図１】垂直板と水平板を一端にスペーサーを挟んで逆Ｔ字型に組み立てた状態を示す側面図である。
【図２】垂直板と水平板を一端にスペーサーを挟んで逆Ｔ字型に組み立て、ろう付けして得られた逆Ｔ字型ろう付け組立体の側面図である。
【図３】図２のＡ−Ａ断面図である。
【符号の説明】
１ 垂直板
２ 水平板
３ スペーサー
４ フィレット[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mixed powder used for brazing Al or an Al alloy and a brazing material containing the mixed powder.
[0002]
[Prior art]
Conventionally, it has been known that an Al or Al alloy product is brazed by using an Al—Si alloy containing brazing material containing 6.8 to 13.0% by weight of Si. The brazing material of the base alloy is formed into a powder, and the brazing powder is mixed with a flux or mixed with a binder resin and a solvent to form a slurry, which is applied to a joint of an Al or Al alloy product to be inert. Brazing by heating in a gas atmosphere is also performed. Although brazing powder has the advantage that it can be easily applied to parts where structural brazing is difficult, such as complicated-shaped products, it has a large gap between joints (for example, a joint between a heat exchanger tube and a header). Area) and joints that require the formation of large fillets require a significant increase in the amount of brazing material required for brazing, and this has been conventionally addressed by increasing the amount of brazing material powder applied. .
[0003]
[Problems to be solved by the invention]
However, there is a limit to the amount of the brazing powder that can be applied in a single coat (flow coating method). To increase the amount of the brazing powder to be applied, multiple coatings are required, and an increase in the number of coatings would be expensive. With the increase in the use amount of the material powder, the brazing time is increased, which causes an increase in manufacturing cost.
[0004]
[Means for Solving the Problems]
Therefore, the present inventors have conducted research to develop a brazing filler metal powder that can be brazed in a small amount from the above-described viewpoints.
(A) A mixed powder composed of an Al-Si binary hypereutectic alloy powder having a composition of Al and unavoidable impurities and containing Si: 13 to 45% by weight, and the balance being Si. The Al-Si binary hypereutectic alloy powder and the Si powder contained in the powder will be obtained from a brazing mixed powder composed of a mixed powder having a total Si content of 15 to 60%. The material powder can be brazed in a relatively small amount by using this to braze Al or an Al alloy.
(B) Since the melting point of the Si powder is higher than the melting point of the Al-Si binary hypereutectic alloy powder, and the Si powder is significantly eroded into the base material, it is necessary to apply the Si powder uniformly over the entire coating surface. Therefore, the particle size of the Si powder is preferably smaller than the particle size of the Al-Si binary hypereutectic alloy powder, and therefore, the average particle size of the Al-Si binary hypereutectic alloy powder The diameter is in the range of 5 to 100 μm, the average particle size of the Si powder is in the range of 1 to 50 μm, and the average particle size of the Al-Si binary hypereutectic alloy powder is the average particle size of the Si powder. Research has shown that it is necessary to have an average particle diameter that is relatively larger than the diameter.
[0005]
The present invention has been made based on the above research results,
(1) Al composed of a mixed powder composed of an Al-Si binary hypereutectic alloy powder having a composition consisting of Al and inevitable impurities and containing Si: 13 to 45% by weight, the balance being Al and inevitable impurities. Or a mixed powder for brazing Al alloy,
(2) A mixed powder composed of Al-Si binary hypereutectic alloy powder having a composition of Al and unavoidable impurities and containing Si in an amount of 13 to 45% by weight, the balance being Al and Si powder. Al or an Al alloy brazing mixed powder in which the Al-Si binary hypereutectic alloy powder and the Si powder contained in the powder are mixed such that the total amount of Si is 15 to 60%;
(3) The average particle size of the Al-Si binary hypereutectic alloy powder is in the range of 5 to 100 µm, the average particle size of the Si powder is in the range of 1 to 50 µm, and Al-Si The Al or Al alloy brazing mixed powder according to the above (1) or (2), wherein the average particle diameter of the binary hypereutectic alloy powder has an average particle diameter relatively larger than the average particle diameter of the Si powder. It is characterized by the following.
[0006]
The mixed powder for brazing Al or Al alloy according to the above (1), (2) or (3) can be used as a slurry by mixing a flux or mixing with a binder resin and a solvent. Therefore, the present invention
(4) an Al or Al alloy brazing material obtained by mixing the Al or Al alloy brazing mixed powder according to (1), (2) or (3) with a flux;
(5) An Al or Al alloy brazing material obtained by mixing the Al or Al alloy brazing mixed powder according to the above (1), (2) or (3) with a binder resin and a solvent to form a slurry. Have
[0007]
Al-Si binary hypereutectic alloy in which the Al-Si binary hypereutectic alloy powder contained in the Al or Al alloy brazing mixed powder of the present invention has a Si content in the range of 13 to 45%. When the powder is used, the base material can be sufficiently dissolved without becoming eutectic or hypereutectic and excessively corroding the base material. The Al-Si binary hypereutectic alloy powder contained in the Al or Al alloy brazing mixed powder of the present invention preferably has a Si content of 15 to 45%, more preferably 20 to 30%. Is even more preferred.
[0008]
The mixed powder for brazing Al or Al alloy of the present invention further contains Si powder, and the Si powder has a total amount of Si of 15 to 60% with respect to the Al-Si binary hypereutectic alloy powder. In the brazing material composed of a mixed powder in which the Si powder contains less than 15% of the total amount of Si with respect to the Al-Si binary hypereutectic alloy powder, the effect of dissolving the base metal is obtained. On the other hand, a brazing material composed of a mixed powder containing a total amount of Si exceeding 60% undesirably causes excessive corrosion of the base material and causes a reduction in strength. Therefore, the Al or Al alloy brazing mixed powder of the present invention was determined so that the total amount of Si was 15 to 60% with respect to the Al-Si binary hypereutectic alloy powder. The Si powder is more preferably in the range of 20 to 45% in total of the amount of Si, and still more preferably in the range of 25 to 35%.
[0009]
Since the Si powder contained in the mixed powder for brazing Al or Al alloy of the present invention has a higher melting point than the Al-Si binary hypereutectic alloy powder, the particle size of the Si powder is reduced. It is necessary to make the grain size smaller than that of the eutectic alloy powder, to uniformly disperse it in Al or an Al alloy brazing mixed powder, to reduce local erosion by Si powder, and to moderate the erosion of the base material surface. Therefore, in the Al or Al alloy brazing mixed powder of the present invention, the average particle diameter of the Al-Si binary hypereutectic alloy powder is in the range of 5 to 100 µm, and the average particle diameter of the Si powder is 1 to 100 µm. It is preferable that the average particle diameter of the Al-Si binary hypereutectic alloy powder is in the range of 50 µm and is relatively larger than the average particle diameter of the Si powder. The average particle diameter of the Al-Si binary hypereutectic alloy powder contained in the Al or Al alloy brazing mixed powder of the present invention is in the range of 10 to 70 µm, and the average particle diameter of the Si powder is 1 to 30 µm. It is more preferable that the average particle diameter of the Al-Si binary hypereutectic alloy powder is relatively larger than the average particle diameter of the Si powder. An even more preferred range is that the average particle size of the Al-Si binary hypereutectic alloy powder is in the range of 15 to 40 µm, the average particle size of the Si powder is in the range of 1 to 20 µm, and the Al-Si Even more preferably, the average particle size of the binary hypereutectic alloy powder has an average particle size relatively larger than the average particle size of the Si powder.
[0010]
The reason that the use amount of the brazing filler metal powder can be reduced by using the Al or Al alloy brazing powder mixture of the present invention is that the mixed powder composed of the Al-Si binary hypereutectic alloy powder and the Si powder is Since Si is a hypereutectic alloy powder as a whole, Si diffuses and flows into the base material during brazing, lowering the melting point of the base material and melting and eroding a part of the base material. It is considered that part of the base material thus formed flows together with the applied mixed powder, and this is caused by filling gaps at the joints or forming fillets.
[0011]
Since the mixed powder for brazing Al or Al alloy of the present invention contains Si powder, erosion in the depth direction of the base material is remarkable before the Si powder is brazed to form a fillet, and the thickness of the base material is extremely thin. In some cases, through holes may be generated due to corrosion. Therefore, the Al or Al alloy brazing mixed powder composed of the mixed powder composed of the Al-Si binary hypereutectic alloy powder and the Si powder of the present invention has a relatively thick Al thickness of 0.5 mm or more. Or, it is particularly suitable for brazing an Al alloy plate.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the mixed powder for brazing of the present invention will be specifically described with reference to examples.
The molten Al alloy having the component compositions shown in Tables 1 and 2 was atomized to produce Al-Si binary alloy powder having the average particle size shown in Tables 1 and 2, and these Al-Si binary alloy powders were produced. Pure Si powder having the average particle size shown in Tables 1 and 2 was blended with the base alloy powder in the proportions shown in Tables 1 and 2, and mixed to obtain a total Si amount shown in Tables 1 and 2. The mixed powders for brazing of the present invention (hereinafter, referred to as mixed powders of the present invention) 1 to 8 and the mixed powders for comparative brazing (hereinafter, referred to as comparative mixed powders) 1 to 5 were prepared. Furthermore, a conventional powder containing no pure Si powder made of an Al-Si binary alloy powder was prepared. These mixed powders 1 to 8 of the present invention, comparative mixed powders 1 to 5 and conventional powder were mixed at a ratio of 1 part by weight of flux to 1 part by weight of binder with respect to 10 parts by weight to prepare a brazing slurry. In addition, comparative mixed powders 1 to 5 are those in which the content of any one of the constituents is out of the range of the present invention.
[0013]
Further, a vertical plate having dimensions of 30 mm in length, 50 mm in width, and 1 mm in thickness of JIS A3003 is prepared, and a horizontal plate having dimensions of 30 mm in length, 60 mm in width, and 1.5 mm in thickness is further prepared. As shown in FIG. 1, a vertical plate 1 and a
[0014]
The amount of the brazing material applied required to produce the inverted T-shaped brazing assembly having a filling length L of 30 mm was measured, and the results are shown in Tables 1 and 2. The maximum erosion depth H of the
[0015]
[Table 1]
[Table 2]
【The invention's effect】
From the results shown in Tables 1 and 2, it can be seen that the application amount of the brazing filler metal produced using the mixed powders 1 to 8 of the present invention is much smaller than the application amount of the brazing filler metal produced using the conventional powder. Further, the maximum erosion depth of the brazing filler metal made with the comparative mixed powder 1 in which the content of the Si powder is larger than the range of the present invention becomes too large, which is not preferable, and the content of the Si powder is lower than the range of the present invention. The brazing filler metal made with the comparative
[0018]
As described above, the brazing filler metal containing the mixed powder for Al or Al alloy brazing of the present invention can fill gaps with a small amount of brazing filler metal, can reduce the weight of brazing parts, and is industrially useful. It has a special effect.
[Brief description of the drawings]
FIG. 1 is a side view showing a state in which a vertical plate and a horizontal plate are assembled in an inverted T shape with a spacer interposed at one end;
FIG. 2 is a side view of an inverted T-shaped brazing assembly obtained by assembling and brazing a vertical plate and a horizontal plate with a spacer interposed at one end and a spacer therebetween.
FIG. 3 is a sectional view taken along line AA of FIG. 2;
[Explanation of symbols]
1
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07535797A JP3601238B2 (en) | 1997-03-27 | 1997-03-27 | Mixed powder for brazing Al or Al alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07535797A JP3601238B2 (en) | 1997-03-27 | 1997-03-27 | Mixed powder for brazing Al or Al alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10263877A JPH10263877A (en) | 1998-10-06 |
| JP3601238B2 true JP3601238B2 (en) | 2004-12-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07535797A Expired - Fee Related JP3601238B2 (en) | 1997-03-27 | 1997-03-27 | Mixed powder for brazing Al or Al alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3601238B2 (en) |
-
1997
- 1997-03-27 JP JP07535797A patent/JP3601238B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10263877A (en) | 1998-10-06 |
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