JPH01202393A - Aluminum alloy brazing filler metal and its manufacture - Google Patents
Aluminum alloy brazing filler metal and its manufactureInfo
- Publication number
- JPH01202393A JPH01202393A JP2678088A JP2678088A JPH01202393A JP H01202393 A JPH01202393 A JP H01202393A JP 2678088 A JP2678088 A JP 2678088A JP 2678088 A JP2678088 A JP 2678088A JP H01202393 A JPH01202393 A JP H01202393A
- Authority
- JP
- Japan
- Prior art keywords
- brazing
- alloy
- filler metal
- brazing filler
- fins
- 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 40
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 27
- 239000002184 metal Substances 0.000 title claims abstract description 27
- 239000000945 filler Substances 0.000 title claims abstract description 13
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000002245 particle Substances 0.000 claims abstract description 14
- 230000005496 eutectics Effects 0.000 claims abstract description 13
- 239000010419 fine particle Substances 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 229910006776 Si—Zn Inorganic materials 0.000 claims abstract 5
- 229910045601 alloy Inorganic materials 0.000 claims abstract 5
- 239000000956 alloy Substances 0.000 claims abstract 5
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 3
- 239000011261 inert gas Substances 0.000 abstract description 2
- 229910052725 zinc Inorganic materials 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 229910001297 Zn alloy Inorganic materials 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910000679 solder Inorganic materials 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052786 argon Inorganic materials 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
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al as the principal constituent
- B23K35/288—Al as the principal constituent with Sn or Zn
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野］
この発明は、その外表面にフィンが取り付けられたアル
ミニウム製熱交換器を製造する際における、管体に対す
るフィンのろう付けのためのアルミニウム合金ろう材お
よびその製造方法に関するものである。Detailed Description of the Invention [Industrial Application Field] The present invention relates to an aluminum alloy for brazing fins to a tube body when manufacturing an aluminum heat exchanger having fins attached to the outer surface of the aluminum heat exchanger. The present invention relates to a brazing filler metal and a method for producing the same.
例えば、自動車用のラジェーター、クーラーのコンデン
サまたはエバポレータなどには、アルミニウム製の熱交
換器が使用されている。For example, aluminum heat exchangers are used in automobile radiators, cooler condensers, and evaporators.
このような熱交換器は、押出し成形された偏平で且つ多
孔のアルミニウム製の管体の表面上に、ｆｉＪ−Ｓｉ系
アルミニウム合金の金属ろう材がクラッドされたプレー
ジングシートからなるフィンを仮付けした後、フィンが
仮付けされた組立て体を加熱し、フィンを管体の表面上
にろう付けすることにより製造していた。Such a heat exchanger is made by temporarily attaching fins made of a plating sheet clad with fiJ-Si aluminum alloy metal brazing material to the surface of an extruded flat and porous aluminum tube. After that, the assembly to which the fins have been temporarily attached is heated, and the fins are brazed onto the surface of the tube body.
しかしながら、上述の方法によって製造する場合、フィ
ンの肉厚が薄いと、ろう付は時におけるフィンの高温耐
サグ性が劣化し、フィンのろう付けが不良になる問題が
生ずる。そこで、上述した問題を解決する手段として、
偏平で且つ多孔のアルミニウム製の管体の表面上に、例
えばＡｌ−３ｔ −Ｍｇ系アルミニウム合金からなる、
厚さ１０−程度の薄板状のろう材を、置きろうとして貼
り付け、その表面にろう材を有しないフィンを仮付し、
その接合部にフラックスを塗布した後、フィンが仮付け
された組立て体を加熱炉にて加熱し、フィンを管体の表
面上にろう付けする方法が知られている。However, when manufacturing by the above method, if the fins are thin, the high temperature sag resistance of the fins during brazing deteriorates, resulting in a problem that the fins are poorly brazed. Therefore, as a means to solve the above problem,
On the surface of a flat and porous aluminum tube, for example, a material made of Al-3t-Mg-based aluminum alloy,
A thin plate-shaped brazing material with a thickness of about 10 mm was pasted on the surface, and fins without brazing material were temporarily attached to the surface.
A method is known in which, after applying flux to the joint, the assembly to which the fins are temporarily attached is heated in a heating furnace, and the fins are brazed onto the surface of the tube body.
しかしながら、上述した管体の表面上に置きろうを貼り
付け、フィンとの接合部にフラックスを塗布してろう付
けを行なう方法には、次のような問題がある。即ち、通
常の鋳造および圧延による方法では、厚さが１０−以下
の薄板状のろう材を製造することが困難であり、且つ、
製造されたとしても、得られたろう材の組織は、５０ｔ
ｒｍ以上の粗い組織になるため、表面皮膜の影響も加わ
って、フラックスを使用しても、フィンと管体とを確実
にろう付けすることが困難であり、その上、ろう付は部
の耐食性も不十分である。However, the above-described method of attaching a solder to the surface of the tube and applying flux to the joint with the fin for brazing has the following problems. That is, it is difficult to produce a thin plate-shaped brazing filler metal with a thickness of 10 mm or less using ordinary casting and rolling methods, and
Even if it were manufactured, the structure of the obtained brazing filler metal would be 50t.
Since the structure is coarser than rm, and the effect of the surface film is added, it is difficult to reliably braze the fin and tube body even if flux is used.Moreover, brazing has a problem with the corrosion resistance of the part. is also insufficient.
従って、この発明の目的は、ろう付は性および耐食性に
優れ且つ製造が容易な、管体に対するフィンのろう付け
のための、管体表面上に貼り付けるアルミニウム合金ろ
う材およびその製造方法を提供するものである。。Therefore, an object of the present invention is to provide an aluminum alloy brazing material to be attached to the surface of a tube body for brazing fins to the tube body, which has excellent brazing properties and corrosion resistance, and is easy to manufacture, and a method for manufacturing the same. It is something to do. .
この発明のアルミニウム合金ろう材は、５．０〜１２．
０ｗｔ、χのＳｉおよび０．５〜５． ０ｗｔ．％のＺ
ｎを含有し、そして、５Ｉ！ｒｎ以下の粒子間隔で分散
された微細粒子によって構成された共晶組織を有するＡ
ｌ−３ｉ−Ｚｎ合金からなることに特徴を有するもので
ある。The aluminum alloy brazing material of the present invention has a 5.0 to 12.
0 wt, χ Si and 0.5-5. 0wt. %Z
n and 5I! A having a eutectic structure composed of fine particles dispersed at a particle spacing of rn or less
It is characterized by being made of l-3i-Zn alloy.
この発明において、Ｓｔは、ろうの融点を下げ、ろう付
は温度を低めてろう付は性を良好にする作用を有してい
る。しかしながら、Ｓｔの含有量が５、Ｏｗｔ、Ｘ未満
では、上記作用に所望の効果が得られない。一方、Ｓｉ
の含有量が１２．Ｏｗｔ、χを超えると、Ｓｉの粗大粒
が生成しやすくなり、生成した粗大粒が粗に分布し、ろ
うの溶融までに長時間を必要とする結果、ろう付は時間
を長くし、または、ろう付は温度を高めなければならな
い問題が生ずる。従って、Ｓｉの含ｌｒ量は、５．０〜
１２． Ｏｗｔ、ＮＯ）範囲内に限定すべきである。In this invention, St lowers the melting point of the solder, lowers the temperature during brazing, and has the effect of improving the properties of brazing. However, if the St content is less than 5,000,000, the desired effect cannot be obtained. On the other hand, Si
The content of is 12. If Owt, χ is exceeded, coarse particles of Si are likely to be generated, the generated coarse particles are coarsely distributed, and as a result, it takes a long time for the solder to melt, and as a result, the brazing time becomes longer, or Brazing creates the problem of having to raise the temperature. Therefore, the content of Si is 5.0~
12. Owt, NO) should be limited within the range.
Ｚｎは、ろう付は部の耐食性を向上させる作用を有して
いる。しかしながら、Ｚｎの含有量が０．５ｗｔ、χ未
満では、上記作用に所望の効果が得られず、−方、Ｚｎ
の含有量が５．Ｏｗｔ、χを超えると、逆に腐食速度が
早くなる問題が生ずる。従って、Ｚｎの含有量は、０．
５〜５．０ｗｔ、χの範囲内に限定すべきである。
・
この発明において、Ａｌ−３ｔ−Ｚｎ合金の共晶組織を
、５／Ｉｌｌ以下の粒子間隔で分散された微細粒子によ
って構成したことは、もっとも重要な特徴である。即ち
、Ａｊ−Ｓｔ−Ｚｎ合金の共晶組織を上述のような粒子
間隔で分散された微細粒子によって構成したことにより
、ろう付は時におけるろうの溶融時間が短縮されると共
に、ろうの流動性を高めることができ、ろう付は性を良
好にすることができる。Zn has the effect of improving the corrosion resistance of the brazing part. However, if the Zn content is less than 0.5 wt, χ, the desired effect cannot be obtained from the above action;
The content of 5. If Owt, χ is exceeded, the problem arises that the corrosion rate becomes faster. Therefore, the Zn content is 0.
It should be limited within the range of 5 to 5.0 wt, χ.
- The most important feature of this invention is that the eutectic structure of the Al-3t-Zn alloy is composed of fine particles dispersed at a particle spacing of 5/Ill or less. That is, by forming the eutectic structure of the Aj-St-Zn alloy with fine particles dispersed at the above-mentioned particle spacing, the melting time of the solder during brazing is shortened, and the fluidity of the solder is improved. Brazing can improve the properties.
次に、上述した成分組成および組織のろう材の製造方法
について述べる。即ち、５．０〜１２．０ｗｔ．％のＳ
Ｉおよび０．５〜５． Ｏｈｔ、＄のＺｎを含有するＡ
ｌ−５ｉ−Ｚｎ合金の溶湯を、るつぼによって溶製する
。次いで、上記により得られた溶湯を、るつぼの下方に
設けられた所定速度で回転する銅製の水冷ロールの表面
に向け、るつぼの底面に形成された所定寸法のスリット
を通し流下させ且つ不活性ガスによって吹き付けること
により、前記溶湯を１０３“Ｃ／ｓｅｅ以上の凝固速度
で急冷する。上述のようにして溶湯を急冷することによ
り、５Ｊｒｍ以下の粒子間隔で分散された微細粒子の共
晶＆ＩＩｖａからなるＭ−５ｉ−Ｚｎ合金の薄板状のろ
う材が製造される。Next, a method for manufacturing a brazing filler metal having the above-mentioned component composition and structure will be described. That is, 5.0 to 12.0 wt. %S
I and 0.5-5. Oht, A containing $ Zn
A molten l-5i-Zn alloy is melted in a crucible. Next, the molten metal obtained above is directed to the surface of a water-cooled copper roll provided below the crucible and rotates at a predetermined speed, and is caused to flow down through a slit of a predetermined size formed on the bottom of the crucible, and is then heated with an inert gas. The molten metal is quenched at a solidification rate of 103"C/see or more by spraying the molten metal with the above method. By quenching the molten metal as described above, the molten metal is made of eutectic &IIva fine particles dispersed at a particle spacing of 5 Jrm or less. A thin plate brazing filler metal of M-5i-Zn alloy is produced.
溶湯の凝固速度は、上述したように、１０″″Ｃ／ｓｅ
ｃ以上であることを必要とする。即ち、凝固速度が１０
３°（／ｓｅｃ未満では、５−以下の粒子間隔で分散さ
れた微細粒子からなる組織にすることができない。なお
、凝固速度が１０ ｈ′Ｃ／ｓｅｃを超えても、上述し
た作用に格別の向上が現われず、急冷のための費用が増
大して不経済になる。従って、溶湯の好ましい凝固速度
は、１０３〜１０６°（：／ｓｅｃである。As mentioned above, the solidification rate of the molten metal is 10''C/se
c or higher. That is, the solidification rate is 10
If the solidification rate is less than 3°/sec, it is not possible to form a structure consisting of fine particles dispersed at a particle spacing of 5° or less. However, even if the solidification rate exceeds 10 h'C/sec, the above-mentioned effect will not be significantly improved. However, the cost for quenching increases and becomes uneconomical. Therefore, the preferred solidification rate of the molten metal is 103 to 106° (:/sec).
上述の方法によれば、ろう材として好ましい５〜１１０
０Ｊ１程度の厚さの／ｄ −３ｉ Ｚｎ合金の薄板を
容易に製造することができる。なお、板厚は上述の範囲
に限られるものではないが、水冷ロールの冷却能力との
関係において定まり、板厚が大になるほど、板厚方向の
すべての部分を、上述の凝固速度で冷却することが困難
になる。According to the above method, the brazing material is preferably 5 to 110.
A thin plate of /d −3i Zn alloy with a thickness of about 0J1 can be easily manufactured. Although the plate thickness is not limited to the above range, it is determined in relation to the cooling capacity of the water-cooled roll, and as the plate thickness increases, all parts in the thickness direction are cooled at the solidification rate described above. things become difficult.
次に、この発明を実施例により説明する。 Next, the present invention will be explained with reference to examples.
第１表に示すように、本発明の範囲内の化学成分組成お
よび共晶組織を有する本発明のアルミニウム合金ろう材
の供試体（以下、「本発明供試体」という）Ｎα１〜５
と、そして、本発明の範囲外の化学成分組成または共晶
組織を存する比較のためのアルミニウム合金ろう材の供
試体（以下、「比較用供試体Ｊという）Ｎα１〜５とを
、次に述べる方法によって調製した。As shown in Table 1, specimens of aluminum alloy brazing filler metal of the present invention (hereinafter referred to as "specimens of the present invention") having chemical compositions and eutectic structures within the scope of the present invention Nα1 to 5
And, aluminum alloy brazing filler metal specimens for comparison (hereinafter referred to as "comparative specimen J") Nα1 to Nα5 having a chemical composition or eutectic structure outside the scope of the present invention are described below. Prepared by method.
第１表に示す化学成分組成の本発明供試体および比較用
供試体の各々の溶湯を、るつぼによって溶製した。上述
のようにして溶製された本発明供試体Ｎα１〜５および
比較用供試体Ｎα１〜４の各々の溶湯を、るつぼの下方
に設けられた、３０００ｒ、ｐ、ｍの速度で回転する、
直径２５０Ｉの銅製の水冷ロールの表面に向け、るつぼ
の底面に設けられた０、 ５ Ｘ ３０ ｍｓの寸法の
スリットを通して流出させ、且つ、高速高圧のアルゴン
ガスを吹き付けて、第１表に示す凝固速度により急冷し
た。かくして、同表に示す粒子間隔で分散された粒子に
よ−って構成された共晶組織からなる、同表に併せて示
す厚さの本発明供試体Ｎ１１１〜５および比較用供試体
阻１〜４を調製した。Molten metals of the present invention specimen and comparative specimen having the chemical compositions shown in Table 1 were melted in a crucible. The molten metals of the present invention specimens Nα1 to 5 and comparative specimens Nα1 to 4 produced as described above are rotated at a speed of 3000 r, p, m in a crucible provided below.
The solidification shown in Table 1 was achieved by directing the flow toward the surface of a copper water-cooled roll with a diameter of 250 I through a slit with dimensions of 0.5 x 30 ms provided at the bottom of the crucible, and by spraying high-speed, high-pressure argon gas. It was rapidly cooled. Thus, the present invention specimens N111 to 5 and the comparative specimen No. 1, each having a eutectic structure composed of particles dispersed at the particle spacing shown in the same table, and having the thickness shown in the same table. ~4 was prepared.
一方、前述のようにして溶製された比較用供試体Ｎα５
の溶湯を、水冷鋳型に注入し、３５ Ｘ２００Ｘ３００
ｗｎの寸法の鋳塊を鋳造した。得られた鋳塊を、通常の
条件で熱間圧延して熱間圧延薄板となし、次いで、得ら
れた熱間圧延薄板に対し、冷間圧延と中間焼鈍とを複数
回繰返して施し、かくして、同表に示す粒子間隔で分散
された粒子によって構成された共晶組織からなる、同表
に併せて示す厚さの比較用供試体阻５を調製した。On the other hand, the comparison specimen Nα5 produced as described above
Pour the molten metal into a water-cooled mold to form a 35 x 200 x 300
An ingot with dimensions of wn was cast. The obtained ingot is hot-rolled under normal conditions to form a hot-rolled thin plate, and then the obtained hot-rolled thin plate is repeatedly subjected to cold rolling and intermediate annealing several times, and thus Comparative specimen No. 5 was prepared having a eutectic structure composed of particles dispersed at the particle spacing shown in the same table and having a thickness shown in the same table.
次いで、図面に示すように、上記により調製さされた本
発明供試体および比較用供試体の各々からなるろう材２
を、幅ａが４０ｍ、長さｂが１００鵬、厚さＣが０．６
ｃｍの偏平状の管体１ （ＪＩＳ Ａ１０５０ ）の
表面に貼り、ろう材２′の表面上に、コルゲート杖に加
工された、下記第２表の成分組成（ＪＩＳ ３００３）
からなる厚さ０．０８ ｔｍのフィン３を仮付けし、組
立て体を調製した。Next, as shown in the drawings, a brazing filler metal 2 made of each of the present invention specimen and comparative specimen prepared as described above was prepared.
The width a is 40m, the length b is 100m, and the thickness C is 0.6m.
The component composition shown in Table 2 below (JIS 3003) was pasted on the surface of a cm flat tubular body 1 (JIS A1050) and processed into a corrugated cane on the surface of the brazing material 2'.
The fins 3 having a thickness of 0.08 tm were temporarily attached, and an assembly was prepared.
上述のようにして調製された組立て体の、管体とフィン
との接合部にフッ化物系のフラックスを塗布した上、７
６０Ｔｏｒｒの窒素ガス雰囲気の加熱炉において、６０
０°Ｃの温度で１０分間加熱し、フィンのろう付けを行
なった。After applying fluoride-based flux to the joint between the tube body and the fins of the assembly prepared as described above, 7
In a heating furnace with a nitrogen gas atmosphere of 60 Torr,
The fins were brazed by heating at 0°C for 10 minutes.
次いで、上記によりフィンがろう付けされた試験体に対
しフィンの引きちぎり試験および耐食試験を施した。耐
食試験は、試験体の各々に対し、酸性海水を７００時間
噴霧した後に、試験体の管体１に発生した最大孔食深さ
を測定することにより行なった。上記試験結果およびフ
ィレットの形成状態を第１表に併せて示す。Next, a fin tearing test and a corrosion resistance test were performed on the test specimens to which the fins were brazed as described above. The corrosion resistance test was conducted by spraying acidic seawater on each test piece for 700 hours and then measuring the maximum pitting depth that occurred in the tube body 1 of the test piece. The above test results and the state of fillet formation are also shown in Table 1.
なお、フィン（厚さ０．０８ ｍ ）の引きちぎり試験
結果は、下記により評価した。Note that the tearing test results of the fins (thickness: 0.08 m) were evaluated as follows.
○：フィンで破断した場合 Δ：フイレット部で破断した場合 ×：フィンではがれた場合 また、フィレットの形成状態は、下記により評価した。○: When the fin breaks Δ: When broken at the fillet part ×: When the fin comes off In addition, the state of fillet formation was evaluated as follows.
Ｏ：十分に形成された場合
Δ：不十分ながら形成された場合
×：殆んど形成されなかった場合
第１表から明らかなように、Ｓｉの含有量が本発明の範
囲を外れて低い比較用供試体隘１は、引きちぎり性およ
びフィレットの形成状態が悪い。また、Ｓｉの含有量が
本発明の範囲を外れて高い比較用供試体に２は、特にフ
ィンの引きちぎり性が悪い。O: Sufficiently formed Δ: Insufficiently formed ×: Hardly formed As is clear from Table 1, the Si content is outside the range of the present invention and is low. Sample No. 1 had poor tearability and fillet formation. In addition, the comparative specimen No. 2, in which the Si content was higher than the range of the present invention, had particularly poor tearing properties of the fins.
Ｚｎを含有しない比較用供試体Ｎα３およびＺｎの含有
量が本発明の範囲を外れて多い比較用供試体Ｎα４は、
何れも耐食性が悪い。Comparative specimen Nα3 which does not contain Zn and comparative specimen Nα4 whose Zn content is higher than the range of the present invention,
All have poor corrosion resistance.
共晶組織の粒子間隔が本発明の範囲を外れて大きい比較
用供試体Ｎ１１５は、フィンの引きちぎり試験結果およ
びフィレットの形状状態が共に悪い。Comparative specimen N115, in which the particle spacing of the eutectic structure is large beyond the range of the present invention, has poor fin tearing test results and poor fillet shape.
これに対して、本発明供試体Ｎα１〜５は、フィンの引
きちぎり試験結果、フィレットの形成状態および耐食性
が何れも良好であった。On the other hand, the specimens Nα1 to Nα5 of the present invention had good results in the fin tearing test, the fillet formation state, and the corrosion resistance.
以上述べたように、この発明のアルミニウム合金ろう材
によれば、ろう材がクラッドされたプレージングシート
からなるフィンを使用する必要がないから、ろう付は時
にフィンの高温耐サグ性が劣化することはない、従って
、厚さが通常０，１６国位である従来のフィンよりも格
段に薄肉の、例えば厚さが０．０８ ｃｍ位のフィンを
取り付けることができ、優れたろう付は性によって管体
に確実にフィンが接着され、しかも耐食性に優れている
等、工業上多くの有用な効果がもたらされる。As described above, according to the aluminum alloy brazing material of the present invention, there is no need to use fins made of plating sheets clad with brazing material, so brazing sometimes deteriorates the high temperature sag resistance of the fins. Therefore, it is possible to install fins that are much thinner than conventional fins, which are usually about 0.16mm thick, for example, about 0.08cm thick, and excellent brazing depends on the nature of the brazing. The fins are reliably bonded to the tube body, and it has excellent corrosion resistance, which brings about many useful effects industrially.
【図面の簡単な説明】
図面は、管体の表面上にフィンを取り付けた状態を示す
概略斜視図である。図面において、１・・・管体、
２・・・ろう材、３・・・フィン。
出願人 三菱アルミニウム株式会社
代理人 潮 谷 奈津夫 （他１名）BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a schematic perspective view showing a state in which fins are attached to the surface of a tube body. In the drawings, 1... pipe body;
2... Brazing metal, 3... Fin. Applicant Mitsubishi Aluminum Co., Ltd. Agent Natsuo Shioya (1 other person)
Claims (2)
５．０ｗｔ．％のＺｎを含有し、そして、５μｍ以下の
粒子間隔で分散された微細粒子によって構成された共晶
組織を有するＡｌ−Ｓｉ−Ｚｎ合金からなることを特徴
とするアルミニウム合金ろう材。1. 5.0-12.0wt. % Si and 0.5~
5.0wt. % of Zn and has a eutectic structure composed of fine particles dispersed at a particle spacing of 5 μm or less.
５．０ｗｔ．％のＺｎを含有するＡｌ−Ｓｉ−Ｚｎ合金
の溶湯を、所定速度で回転する水冷ロールの表面に向け
流下させ、前記水冷ロールにより前記溶湯を１０＾３℃
／ｓｅｃ以上の凝固速度で急冷凝固することにより、５
μｍ以下の粒子間隔で分散された微細粒子によって構成
された共晶組織を有するＡｌ−Ｓｉ−Ｚｎ合金の薄板状
のろう材を製造することを特徴とするアルミニウム合金
ろう材の製造方法。2. 5.0-12.0wt. % Si and 0.5~
5.0wt. A molten Al-Si-Zn alloy containing Zn of
By rapidly cooling and solidifying at a solidification rate of /sec or more, 5
A method for producing an aluminum alloy brazing filler metal, which comprises producing a thin plate-shaped brazing filler metal of an Al-Si-Zn alloy having a eutectic structure composed of fine particles dispersed at a particle interval of .mu.m or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2678088A JPH01202393A (en) | 1988-02-08 | 1988-02-08 | Aluminum alloy brazing filler metal and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2678088A JPH01202393A (en) | 1988-02-08 | 1988-02-08 | Aluminum alloy brazing filler metal and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01202393A true JPH01202393A (en) | 1989-08-15 |
Family
ID=12202819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2678088A Pending JPH01202393A (en) | 1988-02-08 | 1988-02-08 | Aluminum alloy brazing filler metal and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01202393A (en) |
-
1988
- 1988-02-08 JP JP2678088A patent/JPH01202393A/en active Pending
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