JPS63118044A - High strength al alloy brazing sheet for heat exchanger having superior corrosion resistance - Google Patents
High strength al alloy brazing sheet for heat exchanger having superior corrosion resistanceInfo
- Publication number
- JPS63118044A JPS63118044A JP26528586A JP26528586A JPS63118044A JP S63118044 A JPS63118044 A JP S63118044A JP 26528586 A JP26528586 A JP 26528586A JP 26528586 A JP26528586 A JP 26528586A JP S63118044 A JPS63118044 A JP S63118044A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- corrosion resistance
- brazing
- core material
- high strength
- 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.)
- Pending
Links
- 238000005219 brazing Methods 0.000 title claims abstract description 48
- 238000005260 corrosion Methods 0.000 title claims abstract description 25
- 230000007797 corrosion Effects 0.000 title claims abstract description 25
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 14
- 239000011162 core material Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 229910021364 Al-Si alloy Inorganic materials 0.000 claims abstract description 7
- 238000005253 cladding Methods 0.000 claims abstract 6
- 229910045601 alloy Inorganic materials 0.000 claims description 25
- 239000000956 alloy Substances 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 6
- 229910000714 At alloy Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 9
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000000945 filler Substances 0.000 abstract description 8
- 229910052748 manganese Inorganic materials 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 230000035515 penetration Effects 0.000 description 5
- 229910000679 solder Inorganic materials 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- 229910018643 Mn—Si Inorganic materials 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 229910018473 Al—Mn—Si Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、すぐれた耐食性と高強度を有し、特に自動
車用ラジェータの管材やヘッダープレート材、さらにエ
アコンのドロンカップ材などとして用いるのに適したＭ
合金ブレージングシートに関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention has excellent corrosion resistance and high strength, and is particularly suitable for use as pipe materials and header plate materials for automobile radiators, as well as air conditioner cup materials. Suitable M
This invention relates to alloy brazing sheets.
従来、一般に、この種の熱交換器用Ａｌ合金ブレージン
グシートとしては、ＪＩＳ３００３合金を芯材とし、こ
の芯材の片面に、皮材としてＡｌ−Ｓｉ系合金のろう材
をクラッドしたものが知られている。Conventionally, this type of Al alloy brazing sheet for heat exchangers is generally known to have a core material of JIS 3003 alloy, and one side of this core material is clad with an Al-Si alloy brazing material as a skin material. There is.
しかし、上記の従来熱交換器用Ａｌ合金ブレージングシ
ートにおいては、皮材としてのろう材の８１濃度が高く
、このＳｉ成分が特にろう付は時に容易に芯材中に侵入
するため、芯材の耐食性が低下するようになり、この結
果孔食が生じ易くなり、場合によっては比較的早期に貫
通孔を生じるようになるほか、芯材自体の強度が十分で
ないために、近年の軽量化および低コスト化に伴う材料
の薄肉化に十分満足して対応することができないのが現
状である。However, in the above-mentioned conventional Al alloy brazing sheets for heat exchangers, the 81 concentration of the brazing material as the skin material is high, and this Si component sometimes easily penetrates into the core material, especially during brazing, resulting in poor corrosion resistance of the core material. As a result, pitting corrosion is more likely to occur, and in some cases, through-holes occur relatively early.In addition, the strength of the core material itself is not sufficient, which has led to weight reduction and cost reduction in recent years. At present, it is not possible to satisfactorily respond to the thinning of materials that accompanies this trend.
そこで、本発明者等は、上述のような観点から、特に熱
交換器用Ｍ合金ブレージングシートの芯材に着目し、こ
の芯材にすぐれた耐食性と高強度を付与すべく研究を行
なった結果、芯材を、基本的に、重量％で（以下チは重
量％を示す）、Ｍｎ ： ０．３〜１．５％、
Ｓｉ：０．７〜１．２％、
を含有し、残υがＭと不可避不純物からなる組成を有す
るＭ合°金で構成すると、このＡｌ合金は、素地中に微
細なＡｌｌ −Ｍｎ−Ｓｉ化合物が均一に分散した組織
をもつことから、このＭ合金で構成された芯材は、前記
ＡＨ−Ｍｎ −Ｓｉ化合物の作用によって高強度をもつ
ようになるほか、このＡｌ−Ｍｎ−Ｓｉ化合物には、ろ
う付は時に結晶粒を非等方性の比較的粗大粒とする作用
があるので、溶融ろうの芯材への侵入が抑制されるよう
になることから（なお、−般に溶融ろうの侵入は結晶粒
界で起シ、したがって結晶粒が細粒なほど結晶粒界は増
大し、溶融ろうの侵入は促進されるようになる）、芯材
自体のもつすぐれた耐食性が損なわれることがないとい
う知見を得たのである。Therefore, from the above-mentioned viewpoint, the present inventors focused particularly on the core material of M alloy brazing sheets for heat exchangers, and as a result of conducting research to impart excellent corrosion resistance and high strength to this core material, Basically, the core material contains the following in weight% (hereinafter, CH indicates weight%): Mn: 0.3 to 1.5%, Si: 0.7 to 1.2%, and the remainder υ When composed of an M alloy having a composition consisting of M and unavoidable impurities, this Al alloy has a structure in which fine All-Mn-Si compounds are uniformly dispersed in the matrix. The core material has high strength due to the action of the AH-Mn-Si compound, and brazing can sometimes change the crystal grains into anisotropic, relatively coarse grains. As a result, penetration of molten solder into the core material is suppressed (in general, penetration of molten solder occurs at grain boundaries, therefore, the finer the crystal grains, the more They found that the grain boundaries increase and the penetration of molten solder is accelerated), but the excellent corrosion resistance of the core material itself is not impaired.
この発明は、上記知見にもとづいてなされたものであっ
て、
Ｍｎ： ０．３〜１．５％、
Ｓｉ：０．７〜１．２％、
を含有し、さらに必要に応じて、
Ｚｒ： ０．０３〜Ｏ１５％、
Ｃｕ： ０．１〜０．６ ％、
のうちの１種または２推を含有し、残りがＡｔと不可避
不純物からなる組成を有するＡｇ合金で構成された芯材
の片面に、皮材としてＡＨ−Ｓｉ系合金からなるろう材
をクラッドしてなる耐食性にすぐれた熱交換器用高強度
Ａｔ合金ブレージングシートに特徴を有するものである
。This invention was made based on the above knowledge, and contains Mn: 0.3 to 1.5%, Si: 0.7 to 1.2%, and further contains Zr: if necessary. A core material made of an Ag alloy containing one or two of the following: 0.03 to 15% O, Cu: 0.1 to 0.6%, and the remainder consisting of At and unavoidable impurities. The present invention is characterized by a high-strength At alloy brazing sheet for heat exchangers having excellent corrosion resistance and having one side clad with a brazing material made of an AH-Si alloy as a skin material.
つぎに、この発明のＭ合金ブレージングシートにおいて
、芯材の成分組成を上記の通りに限定した理由を説明す
る。Next, in the M alloy brazing sheet of the present invention, the reason why the composition of the core material is limited as described above will be explained.
（ａ） ＭｎおよびＳｉ
これらの成分には、上記のように素地中に均一に分散す
る微細なＡｌ−Ｍｎ −Ｓｉ化合物を形成して、芯材の
強度を向上させると共に、ろう付は時において芯材の結
晶粒を粗大化し、溶融ろうの侵入を抑制して、耐食性の
低下を防止し、もってすぐれた耐食性を確保する作用が
あるが、その含有量が、それぞれＭｎ： ０．３％未満
およびＳｉ：０．７％未満では、前記作用に所望の効果
が得られず、一方その含有量が、Ｍｎ成分にあっては１
．５％を越えると加工性が低下するようになシ、またＳ
ｉ成分にあっては１．２％を越えると、芯材の融点が下
り、ろう付は中に部分溶融が起るようになるばかりでな
く、強度および耐食性も低下するようになることから、
その含有量を、それぞれＭｎ： ０．３〜１．５％、Ｓ
ｉ：０、７〜１．２％と定めた。(a) Mn and Si As mentioned above, these components form fine Al-Mn-Si compounds that are uniformly dispersed in the base material, improving the strength of the core material and sometimes preventing brazing. It has the effect of coarsening the crystal grains of the core material, suppressing the penetration of molten solder, preventing a decrease in corrosion resistance, and ensuring excellent corrosion resistance, but the content of Mn: less than 0.3%. and Si: If the content is less than 0.7%, the desired effect cannot be obtained, while if the content is 1% in the Mn component,
．． If it exceeds 5%, workability will decrease, and S
When the i component exceeds 1.2%, the melting point of the core material decreases, and not only does partial melting occur during brazing, but also the strength and corrosion resistance decrease.
The contents are Mn: 0.3-1.5%, S
i: 0, set at 7-1.2%.
（ｂ） Ｚｒ
Ｚｒ成分には、素地中に均一に分散する微細なＡＡ ３
Ｚ ｒ化合物を形成して、強度を向上させるほか、非等
方性粗大粒の形成を一段と促進させ、溶融ろうの侵入を
阻止して耐食性改善に寄与する作用があるので、より一
層の高強度と耐食性が要求される場合に必要に応じて含
有されるが、その含有量が０．０３％未満では前記作用
に所望の向上効果が得られず、一方その含有量が０．１
５％を越えると加工性が劣化するようになることから、
その含有量を０．０３〜０，１５％と定めた。(b) Zr The Zr component contains fine AA3 particles that are uniformly dispersed in the matrix.
In addition to forming a Zr compound and improving strength, it further promotes the formation of anisotropic coarse grains, prevents the penetration of molten solder, and contributes to improved corrosion resistance, resulting in even higher strength. If the content is less than 0.03%, the desired effect of improving the above action cannot be obtained; on the other hand, if the content is less than 0.1%,
If it exceeds 5%, workability will deteriorate, so
Its content was determined to be 0.03 to 0.15%.
（ｃ） Ｃｕ
Ｃｕ成分には、素地に固溶して、・これを強化し、もっ
て強度を向上させるほか、芯材を相対的に電気化学的に
貴にし、この結果ろう材が芯材に比して−１電気化学的
に卑となることから、ろう材が芯材を防食し、芯材の耐
食性を一段と向上させる作用があるので、必要に応じて
含有されるが、その含有量が０．１チ未満では前記作用
に所望の効果が得られず、一方その含有量が０６チを越
えると、粒界腐食が生じ易くなって耐食性低下を招くよ
うになることから、その含有量を０．１〜０．６％と定
めた。(c) Cu The Cu component is dissolved in the base material to strengthen it, thereby improving its strength, and also makes the core material relatively electrochemically noble, as a result of which the brazing filler metal becomes the core material. Compared to -1 electrochemical base, the brazing filler metal has the effect of preventing corrosion of the core material and further improving the corrosion resistance of the core material, so it is included as necessary, but its content is If the content is less than 0.1 inch, the desired effect cannot be obtained, while if the content exceeds 0.6 inch, intergranular corrosion is likely to occur, resulting in a decrease in corrosion resistance. It was set at 0.1 to 0.6%.
つぎに、この発明のＭ合金ブレージングシートを実施例
により具体的に説明する。Next, the M alloy brazing sheet of the present invention will be specifically explained using examples.
通常の溶解法によシそれぞれ第１表に示される成分組成
をもった芯材用Ｍ合金Ａ−Ｐおよびろう材用Ｍ合金ａ、
ｂを溶製し、鋳造して鋳塊となし、これらの鋳塊に均質
化熱処理と固剤を施した後、芯材用Ｍ合金鋳塊について
は熱間圧延にて、厚さ＝９朋の熱延板とし、一方ろう材
用Ａｇ合金鋳塊については、まず熱間圧延にて厚さ：３
朋の熱延板とした後、冷間圧延にて淳さ：１ｍｍの冷延
板とし、ついで、これらの芯材用Ｍ合金の片面にろう材
用Ｍ合金の板材を、第２表に示される組み合せで重ね合
わせ、熱間圧延にて淳さ＝２Ｂのクラツド材とし、引続
いて冷間圧延と中間焼鈍を施し、この中間焼鈍は厚さ：
０．５７＋ｏｃの時に温度；３７０℃第 １ 衆
に１２０分間保持の条件で行なうことによって厚さ：０
．４朋の本発明Ｍ合金ブレージングシート１〜１３と比
較Ｍ合金ブレージングシート１〜３をそれぞれ製造した
。M alloy A-P for core material and M alloy a for brazing material each having the composition shown in Table 1 by ordinary melting method,
After melting and casting b into an ingot, and subjecting these ingots to homogenization heat treatment and solidifying agent, the M alloy ingot for the core material is hot rolled to a thickness of 9 mm. On the other hand, the Ag alloy ingot for brazing material was first hot-rolled to a thickness of 3.
After forming our hot-rolled sheets, they were cold-rolled to a thickness of 1 mm, and then a plate of M-alloy for brazing filler metal was placed on one side of the M-alloy for core material as shown in Table 2. The materials were stacked together and hot rolled to form a clad material with a thickness of 2B, followed by cold rolling and intermediate annealing, and this intermediate annealing had a thickness of:
When the temperature was 0.57+oc, the temperature was 370°C and the temperature was maintained for 120 minutes, so that the thickness was 0.
．． Four M alloy brazing sheets 1 to 13 of the present invention and comparative M alloy brazing sheets 1 to 3 were manufactured, respectively.
なお、比較Ｍ合金ブレージングシート１〜３は、いずれ
も芯材を構成するＭ合金の合金成分のうちのいずれかの
成分（第１表に※印を付したもの）がこの発明の範囲か
ら外れたものである。In addition, in all of the comparative M alloy brazing sheets 1 to 3, one of the alloy components of the M alloy constituting the core material (those marked with * in Table 1) is outside the scope of this invention. It is something that
また、上記の芯材用Ｍ合金Ａ−Ｐおよびろう材用Ａｔ合
金ａ、ｂは、不可避不純物として、Ｍｎ゛００１％以下
、Ｓｉ：Ｏ，１％以下、Ｚｒ：０．０１％以下、Ｃｕ：
Ｏ，０１％以下、Ｆｅ：０．４％以下、Ｍｇ：０．０１
％以下を含有するものであった。In addition, the above M alloys A-P for core materials and At alloys a and b for brazing materials contain unavoidable impurities such as Mn: 001% or less, Si: O, 1% or less, Zr: 0.01% or less, Cu. :
O, 01% or less, Fe: 0.4% or less, Mg: 0.01
% or less.
つぎに、この結果得られた各種のＭ合金ブレージングシ
ートについて、強度を評価する目的で引張強さを測定し
、さらに耐食性を評価する目的で、真空ろう付は処理お
よび不活性ガスろう伺は処理に相当する条件、すなわち
ろう材用Ａｌ合金すとのブレージングシートについては
、圧カニｌＸ１Ｏ−’ｔｏｒｒの真空中、またろう材用
Ｍ合金ａとのプレー第 ２ 表
ジングシートについては、圧カニ ７６０ ｔｏｒｒの
窒素ガス雰囲気中、温度：６００℃に５分間保持の条件
でそれぞれ加熱処理を施した試料に対して、それぞれ片
面を塗装絶縁し、ろう材側については、７２０時間の酸
性海水噴霧試験、並びに芯材側については、１ ｐｐｍ
のＣｕイオンを含有する水道水に４週間浸漬の水道水浸
漬試験を行ない、いずれの試験でも最大孔食深さを測定
した。これらの測定結果を第２表に示した。Next, for the various M alloy brazing sheets obtained as a result, the tensile strength was measured for the purpose of evaluating the strength, and the vacuum brazing was treated and the inert gas brazing was treated for the purpose of evaluating the corrosion resistance. For the brazing sheet with Al alloy for brazing filler metal, in a vacuum of pressure crab 1X1O-'torr, and for the brazing sheet with M alloy a for brazing filler metal, pressure crab 760 Each sample was heat-treated under conditions of holding the temperature at 600°C for 5 minutes in a nitrogen gas atmosphere of torr. One side of each sample was coated and insulated, and the brazing metal side was subjected to an acidic seawater spray test for 720 hours. and 1 ppm for the core material side.
A tap water immersion test was conducted for 4 weeks in tap water containing Cu ions, and the maximum pitting depth was measured in each test. The results of these measurements are shown in Table 2.
第２表゛に示される結果から、本発明Ｍ合金ブレージン
グシート１〜１３は、いずれも高強度とすぐれた耐食性
を示し、一方比較ＡＡ合金ブレージングシート１〜３に
′見られるように、芯材を構成するＭ合金のいずれかの
成分含有量でもこの発明の範囲から外れると所望の強度
と耐食性が得られないことが明らかである。From the results shown in Table 2, the M alloy brazing sheets 1 to 13 of the present invention all exhibit high strength and excellent corrosion resistance, while, as seen in the comparative AA alloy brazing sheets 1 to 3, the core material It is clear that the desired strength and corrosion resistance cannot be obtained if the content of any component of the M alloy constituting the alloy is outside the scope of the present invention.
上述のように、この発明のＭ合金ブレージングシートは
、すぐれた耐食性と高強度を有するので、特に熱交換器
の構造部材として用いた場合にすぐれた性能を発揮する
ばかりでなく、軽量化のための薄肉化を可能とするなど
工業上有用な特性を有するのである。As mentioned above, the M alloy brazing sheet of the present invention has excellent corrosion resistance and high strength, so it not only exhibits excellent performance especially when used as a structural member of a heat exchanger, but also can be used to reduce weight. It has industrially useful properties such as making it possible to make the walls thinner.
Claims (4)
上重量％）を有するＭ合金で構成された芯材の片面に、
皮材としてＡｌ−Ｓｉ系合金からなるろう材をクラツド
してなる耐食性にすぐれた熱交換器用高強度Ａｔ合金ブ
レージングシート。(1) Contains Mn: 0.3 to 1.5%, Si: 0.7 to 1.2%, and the remainder consists of Al and unavoidable impurities (weight %). On one side of the core material,
A high-strength At alloy brazing sheet for heat exchangers with excellent corrosion resistance, which is made by cladding a brazing material made of an Al-Si alloy as a skin material.
上重量％）を有するＡｌ合金で構成された芯材の片面に
、皮材としてＡｌ−Ｓｉ系合金からなるろう材をクラツ
ドしてなる耐食性にすぐれた熱交換器用高強度Ａｌ合金
ブレージングシート。(2) Contains Mn: 0.3 to 1.5%, Si: 0.7 to 1.2%, further contains Zr: 0.03 to 0.15%, and the remainder is Al. High strength for heat exchangers with excellent corrosion resistance, made by cladding a brazing material made of an Al-Si alloy as a skin material on one side of a core material made of an Al alloy with a composition (weight %) consisting of unavoidable impurities. Al alloy brazing sheet.
上重量％）を有するＡｌ合金で構成された芯材の片面に
、皮材としてＡｌ−Ｓｉ系合金からなるろう材をクラツ
ドしてなる耐食性にすぐれた熱交換器用高強度Ｍ合金ブ
レージングシート。(3) Contains Mn: 0.3 to 1.5%, Si: 0.7 to 1.2%, further contains Cu: 0.1 to 0.6%, and the remainder is Al. High strength for heat exchangers with excellent corrosion resistance, made by cladding a brazing material made of an Al-Si alloy as a skin material on one side of a core material made of an Al alloy with a composition (weight %) consisting of unavoidable impurities. M alloy brazing sheet.
上重量％）を有するＡｌ合金で構成された芯材の片面に
、皮材としてＡｌ−Ｓｉ系合金からなるろう材をクラツ
ドしてなる耐食性にすぐれた熱交換器用高強度Ａｌ合金
ブレージングシート。(4) Contains Mn: 0.3-1.5%, Si: 0.7-1.2%, and further contains Zr: 0.03-0.15%, Cu: 0.1-0. A brazing material made of an Al-Si alloy is clad as a skin material on one side of a core material made of an Al alloy having a composition (by weight) of 6% and the rest consisting of Al and unavoidable impurities. High strength Al alloy brazing sheet for heat exchangers with excellent corrosion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26528586A JPS63118044A (en) | 1986-11-07 | 1986-11-07 | High strength al alloy brazing sheet for heat exchanger having superior corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26528586A JPS63118044A (en) | 1986-11-07 | 1986-11-07 | High strength al alloy brazing sheet for heat exchanger having superior corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63118044A true JPS63118044A (en) | 1988-05-23 |
Family
ID=17415090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26528586A Pending JPS63118044A (en) | 1986-11-07 | 1986-11-07 | High strength al alloy brazing sheet for heat exchanger having superior corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63118044A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54121213A (en) * | 1978-03-15 | 1979-09-20 | Sumitomo Light Metal Ind | Aluminium alloy for core material of brazing sheet |
| JPS57203742A (en) * | 1981-06-08 | 1982-12-14 | Mitsubishi Alum Co Ltd | High strength al alloy with superior thermal deformation resistance and heat conductivity |
| JPS6033346A (en) * | 1983-08-04 | 1985-02-20 | Sukai Alum Kk | Preparation of fin material or brazing sheet for heat exchanger |
-
1986
- 1986-11-07 JP JP26528586A patent/JPS63118044A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54121213A (en) * | 1978-03-15 | 1979-09-20 | Sumitomo Light Metal Ind | Aluminium alloy for core material of brazing sheet |
| JPS57203742A (en) * | 1981-06-08 | 1982-12-14 | Mitsubishi Alum Co Ltd | High strength al alloy with superior thermal deformation resistance and heat conductivity |
| JPS6033346A (en) * | 1983-08-04 | 1985-02-20 | Sukai Alum Kk | Preparation of fin material or brazing sheet for heat exchanger |
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