JPH0255663A - Non-corrosive flux brazing method of al or al alloy - Google Patents
Non-corrosive flux brazing method of al or al alloyInfo
- Publication number
- JPH0255663A JPH0255663A JP20531888A JP20531888A JPH0255663A JP H0255663 A JPH0255663 A JP H0255663A JP 20531888 A JP20531888 A JP 20531888A JP 20531888 A JP20531888 A JP 20531888A JP H0255663 A JPH0255663 A JP H0255663A
- Authority
- JP
- Japan
- Prior art keywords
- brazing
- furnace
- cooling
- alloy
- brazed
- 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 60
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 10
- 230000004907 flux Effects 0.000 title claims description 19
- 230000009972 noncorrosive effect Effects 0.000 title claims description 12
- 238000001816 cooling Methods 0.000 claims abstract description 39
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 22
- 239000011162 core material Substances 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 13
- 238000005260 corrosion Methods 0.000 abstract description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 238000007664 blowing Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 14
- 229910045601 alloy Inorganic materials 0.000 description 13
- 239000000956 alloy Substances 0.000 description 13
- 239000007789 gas Substances 0.000 description 7
- 238000000605 extraction Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 229910018131 Al-Mn Inorganic materials 0.000 description 2
- 229910018461 Al—Mn Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 238000012733 comparative method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005108 dry cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910018182 Al—Cu Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Tunnel Furnaces (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はＡｌ又はＡｌ合金の非腐食性フラックスろう付
け方法に関するもので、ろう付け債の冷却速度をコント
ロールすることにより、焼入れ処理を可能にし、ろう付
け侵のコア強度及びコア部材の耐孔食性を改善するもの
である。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a non-corrosive flux brazing method for Al or Al alloy, which enables hardening treatment by controlling the cooling rate of the brazed bond. , which improves the core strength of brazing corrosion and the pitting corrosion resistance of the core member.
従来Ａｌ又はＡｌ合金からなるろう付け部材のろう付け
法として、例えば自動車用熱交換器のろう付けに、塩化
物系フラックスを使用するろう付け法やフラックスを使
用しない真空ろう付け法が幅広く利用されていたが、近
年フッ化物系の非腐食性フラックスを使用して不活性ガ
ス中で加熱ろう付けする非腐食性フラックスろう付け法
が用いられるようになった。Conventionally, brazing methods that use chloride-based flux and vacuum brazing methods that do not use flux have been widely used as brazing methods for brazing parts made of Al or Al alloy, for example, for brazing heat exchangers for automobiles. However, in recent years, a non-corrosive flux brazing method has come into use, in which fluoride-based non-corrosive flux is used for heating brazing in an inert gas.
塩化物系フラックスを使用するろう付け法は、腐食性フ
ラックスによるろう付け炉の劣化やろう付け後のフラッ
クス残滓の洗浄除去の煩雑さと共に、公害上の問題があ
る。また真空ろう付け法は設備が高価なばかりか、真空
度維持のためのメンテナンスに問題があり、更に内壁に
付着したＭ９の除去作業が煩雑なばかりか、フラックス
ろう付け法に比較しろう付け性のバラツキが大きい。Brazing methods using chloride-based fluxes have problems in terms of pollution, such as deterioration of the brazing furnace due to the corrosive flux and the complexity of cleaning and removing flux residue after brazing. In addition, the vacuum brazing method not only requires expensive equipment, but also has problems with maintenance to maintain the vacuum level.Furthermore, the removal of M9 adhering to the inner wall is complicated, and the brazing performance is lower than that of the flux brazing method. There is a large variation in
これに対しフッ化物系の非腐食性フラックスを使用する
ろう付け法は第２図に示すように予熱ゾーン（１）と加
熱ゾーン（２）と冷却ゾーン（３）を連続してタンデム
に配置し、入口（４）より出口（５）に向かって予熱ゾ
ーン（１）と加熱ゾーン（２）と冷却ゾーン（３）を通
るろう付け部材移送用のメツシュベルト（６）を設け、
加熱ゾーン（２）内にＮガス供給口（７）、 （７°）
よりＮガスを矢印方向にフローさせて、少なくとも加熱
ゾーン（２）内を露点−４０℃以下、酸素濃度１１００
０ｐｐ以下のＮガス雰囲気とした連続炉を用い、ろう付
け部材を脱脂、フラックス塗布、乾燥（２００℃）して
から図には示してないが、連続炉の入口（４）よりメツ
シュベルト（６）上にろう付け部材（コア）を乗せて搬
入し、予熱ゾーン（１）を通して予熱した後、加熱ゾー
ン（２）に送入し、６００℃程度の温度に加熱してろう
付けを行ない、その後冷却ゾーン（３）を通してハンド
リング可能な温度に冷却し、炉外に取出している。尚、
図において（８）は排ガスの乾式洗浄装置（スクラバー
）を示す。On the other hand, the brazing method using fluoride-based non-corrosive flux involves arranging a preheating zone (1), a heating zone (2), and a cooling zone (3) in tandem in succession, as shown in Figure 2. , a mesh belt (6) is provided for transferring the brazing member from the inlet (4) to the outlet (5) through the preheating zone (1), the heating zone (2), and the cooling zone (3);
N gas supply port (7) in heating zone (2), (7°)
N gas is caused to flow in the direction of the arrow at least in the heating zone (2) so that the dew point is -40°C or lower and the oxygen concentration is 1100.
Using a continuous furnace with an N gas atmosphere of 0 pp or less, the brazed parts are degreased, fluxed, and dried (200°C).Although not shown in the figure, the mesh belt (6) is inserted from the entrance (4) of the continuous furnace. The material to be brazed (core) is placed on top and carried in, and after being preheated through the preheating zone (1), it is delivered to the heating zone (2) where it is heated to a temperature of approximately 600°C to perform brazing, and then cooled. It is cooled to a handleable temperature through zone (3) and taken out of the furnace. still,
In the figure, (8) indicates a dry cleaning device (scrubber) for exhaust gas.
現在上記不活性ガスろう付け法はコンデンサ、エバポレ
ーター、ラジェーター等のろう付けに使用されているが
、コンデンサーやエバポレーターは第３図に示すように
押出多穴管（９）を蛇行状に折り曲げ、多穴管（９）の
間にフィン（１０）を取付けたもので、多穴管には純Ａ
ｉ系。Currently, the above-mentioned inert gas brazing method is used to braze condensers, evaporators, radiators, etc., but condensers and evaporators are manufactured by bending an extruded multi-hole tube (9) into a meandering shape as shown in Figure 3. A fin (10) is attached between the hole pipes (9), and the multi-hole pipe is made of pure A.
i series.
Ａｌ−Ｃｕ系、Ａｌ−Ｍｎ系を使用し、フィン材にはＡ
、ｆ！−Ｍｎ−Ｚｎ系の芯材にＡｌ−３ｉ系ろう材をク
ラッドしたプレージングシートを使用する。またラジェ
ーターは第４図に示すように、複数個の電縫チューブ（
１１）間にフィン（１２）を取付け、チューブ（１１）
の端部にヘッダ〜（１３）を設けてタンク（１４）を取
付けたもので、ヘッダーとチューブ材にはＡ、ｆ！−Ｍ
ｎ系芯材の片面に、／１−３ｉ系ろう材をクラッドし、
他面にＡＪ−Ｚｎ系犠牲材をクラッドしたものを使用し
、フィン材にはＡ、ｌ！−Ｍｎ−Ｚｎ系を使用する。尚
フィン材は厚さ０．１〜０．２ｍ、チューブ材は肉厚０
．３〜０．４Ｍ、ヘッダー材は１〜１．６Ｍのものが用
いられている。Al-Cu system and Al-Mn system are used, and the fin material is A
, f! - A plating sheet is used in which a Mn-Zn core material is clad with an Al-3i brazing material. Also, as shown in Figure 4, the radiator is made up of multiple electrically welded tubes (
11) Attach the fin (12) between the tubes (11)
A header ~ (13) is provided at the end of the tank (14) and a tank (14) is attached to it, and the header and tube material are A, f! -M
One side of the n-based core material is clad with /1-3i-based brazing material,
The other side is clad with AJ-Zn sacrificial material, and the fin material is A, l! -Mn-Zn system is used. The thickness of the fin material is 0.1 to 0.2m, and the thickness of the tube material is 0.
．． 3 to 0.4M, and a header material of 1 to 1.6M is used.
自動車用熱交換器の軽量化のニーズに対してアルミニウ
ム部材の高強度化が検討されて、非熱処理合金だけでけ
でなく、熱処理合金を積極的に使用する試みがなされて
いる。しかし現行の連続炉はろう付け加熱と冷却が同一
のライン速度のメツシュベルト上でなされるため、冷却
により焼き入れ処理を行なうためには、冷却速度が遅く
無理がある。通常の冷却スピードは６００℃から１００
℃まで平均３０〜８０℃／ｍｉｎあり、板厚が厚い部分
やコアの熱容量が大きい場合には冷却速度は更に遅くな
るのが実情である。In response to the need to reduce the weight of automobile heat exchangers, increasing the strength of aluminum members is being considered, and attempts are being made to actively use not only non-heat-treated alloys but also heat-treated alloys. However, in the current continuous furnace, brazing heating and cooling are performed on a mesh belt with the same line speed, so the cooling rate is slow and unreasonable in order to perform the hardening process by cooling. Normal cooling speed is 600℃ to 100℃
The cooling rate is on average 30 to 80°C/min, and the actual situation is that the cooling rate becomes even slower in thick parts or in cases where the heat capacity of the core is large.
また耐食性の点でも徐冷することにより、粒界へ添加元
素が析出し、粒界腐食の発生も増長される。In addition, from the viewpoint of corrosion resistance, slow cooling causes additive elements to precipitate at grain boundaries, increasing the occurrence of intergranular corrosion.
現在フッ化物系フラックスろう付け用連続炉で冷却速度
が遅くなるのは次の理由によるものである。The reason why the cooling rate in current continuous furnaces for fluoride flux brazing is slow is as follows.
（リコンベアのスピードが熱交換器コアの均熱によるろ
う付け性の確保のため、遅く設定されており、炉壁を水
冷したウォータージャケットからなる冷却ゾーンも同一
のコンベアスピードとなり、高温域（２５０’Ｃ以上）
の冷却が遅い。(The speed of the reconveyor is set slow to ensure brazing performance by uniform heating of the heat exchanger core, and the cooling zone consisting of a water jacket that cools the furnace wall with water has the same conveyor speed. C or higher)
cooling is slow.
（２）連続炉内のＮ雰囲気中の露点、酸素濃度をろう付
け性向上のために各々−４０℃以下、１０００ＰＰｍ以
下に保持することが必要で、加熱ゾーンから出口に向っ
てＮガスを導入している。ろう付けの最高温度に達した
のち、即ちろう付けのためのフィレットが形成された後
の冷却は加熱ゾーンを出たあとの冷却ゾーンで行なって
いるが、加熱ゾーンを出るまでの時間がかなりある。こ
れはろう付けゾーンへの外部からの８２０ヤαの流入を
防止し、露点、酸素濃度を低く保つため、ある程度のラ
イン長さをとらざるを得ないからである。(2) It is necessary to maintain the dew point and oxygen concentration in the N atmosphere in the continuous furnace at -40°C or lower and 1000PPm or lower, respectively, to improve brazing performance, and N gas is introduced from the heating zone toward the outlet. are doing. After reaching the maximum temperature for brazing, that is, after the fillet for brazing is formed, cooling is performed in the cooling zone after leaving the heating zone, but it takes a considerable amount of time to leave the heating zone. . This is because the line has to be a certain length in order to prevent 820 Y α from flowing into the brazing zone from the outside and to keep the dew point and oxygen concentration low.
（３）ろう付けゾーンを通過した後、連続炉内でファン
空冷することも考えられるが、Ｎガスの流動だけで炉の
温度制御をしている現行炉にとっては、これはろう付け
ゾーンの温度分布を変化させ、ろう付け性に影響を及ば
ず危険がある。(3) After passing through the brazing zone, it is possible to air-cool the furnace in a continuous furnace with a fan, but for current furnaces that control the furnace temperature only by the flow of N gas, this is because the temperature in the brazing zone is too low. It is dangerous because it changes the distribution and does not affect brazability.
本発明はこれに鑑み種々検討の結果、ろう付け後の冷却
速度をコントロールすることにより、焼入れ処理を可能
にし、ろう付け後のコア強度及びコア部材の耐孔食性を
改善したＡＩ又はＡｌ合金の非腐食性フラックスろう付
（プ方法を開発したものである。In view of this, as a result of various studies, the present invention has developed an AI or Al alloy that enables quenching treatment and improves the core strength and pitting corrosion resistance of the core member after brazing by controlling the cooling rate after brazing. A non-corrosive flux brazing method was developed.
即ち本発明は、露点−４０℃以下、酸素濃度１１０００
１）ｔ）以下の不活性ガス雰囲気としたろう付け用連続
炉内に、Ａｌ又はＡｌ合金からなるろう付け部材を搬入
移送して加熱ろう付けする非腐食性フラックスろう付け
方法において、加熱ろう付けしたろう付け部材を５００
℃以上の温度で別系統の搬出系に移載し、急速に炉外に
取出し、冷却装置に導入して急速に冷却することを特徴
とするもので、加熱ろう付けしたろう付け部材を冷却装
置内で５００℃から２００℃まで１００℃／ｍｉｎ以上
の冷却速度で冷却する。That is, the present invention has a dew point of -40°C or lower and an oxygen concentration of 11,000°C.
1) t) In a non-corrosive flux brazing method in which a brazing member made of Al or Al alloy is transported and heated into a continuous brazing furnace with an inert gas atmosphere as shown below, heat brazing is performed. 500 pieces of brazed parts
It is characterized by transferring the brazed parts to a separate delivery system at a temperature of ℃ or higher, rapidly taking them out of the furnace, and introducing them into a cooling device for rapid cooling. Cool from 500°C to 200°C at a cooling rate of 100°C/min or more.
本発明は上記の如くろう付けゾーン以後を別系統の搬送
系を使用し、ろう付け部材を短時間のうちに連続炉から
取出し、冷却装置内へ導入するとともに、冷却装置内で
５００ ’Ｃから２００℃まで急速に冷却することによ
り、ろう付け部材の粗大析出物生成を抑制し、ろう付け
性を低下させることな−くろう付け部材の焼入れ処理を
可能にしたものである。As described above, the present invention uses a separate conveyance system after the brazing zone, takes out the brazing parts from the continuous furnace in a short time, introduces them into the cooling device, and heats them from 50'C in the cooling device. Rapid cooling to 200° C. suppresses the formation of coarse precipitates in the brazing member, making it possible to harden the brazing member without reducing brazing properties.
本発明において５００℃から２００℃までの冷却速度を
１００℃／ｍｉｎ以上としたのは、ＪＩＳ ６９５１合
金、 ＪＩＳ ７ＮＯ１合金等自動車用熱交換器に使用
される熱処理合金がこの温度域でＭｇｚＳｉ。In the present invention, the cooling rate from 500°C to 200°C is set to 100°C/min or more because heat-treated alloys used in automobile heat exchangers, such as JIS 6951 alloy and JIS 7NO1 alloy, cannot be heated to MgzSi in this temperature range.
ＭＶＺｎｚ等の粗大析出物を生成するのを抑制するため
であり、これ等粗大析出物を生成させない冷却速度は合
金によっても異なるが１００’Ｃ／ｍｉｎ以上が必要で
ある。This is to suppress the formation of coarse precipitates such as MVZnz, and the cooling rate for preventing the formation of such coarse precipitates is required to be 100'C/min or more, although it varies depending on the alloy.
焼入れのためには、空気、水スプレー等適当な冷却手段
を講ずればよい。また溶体化が必要な場合には、別の加
熱炉内で所定温度に所定時間加熱すればよい。For hardening, appropriate cooling means such as air or water spray may be used. If solution treatment is required, the material may be heated to a predetermined temperature for a predetermined time in a separate heating furnace.
（実施例） 以下本発明を実施例について詳細に説明１−る。(Example) Hereinafter, the present invention will be explained in detail with reference to Examples.
実施例（１）
第１図に示すように加熱ゾーン（２）の後に、メツシュ
ベルト（６）とは別のメツシュベルト（コンベア）（６
’）による搬送系からなる高速取出ゾーン（３゛）とし
た。加熱ゾーン（２）のメツシュベルト（６）の移動速
度は５００ ｇ／ｍｉｎとし、６００℃でのろう付け加
熱ろう付Ｃプを可能にした。Example (1) As shown in FIG. 1, a mesh belt (conveyor) (6) separate from the mesh belt (6) is installed after the heating zone (2).
A high-speed extraction zone (3゛) consisting of a conveyance system using The moving speed of the mesh belt (6) in the heating zone (2) was set at 500 g/min to enable brazing heating at 600°C.
高速取出しゾーンは移動速度を５００〜１００００、ｓ
／ ｍ ｉ ｎと可変とし、ろう付け部材を５００℃
以上の温度から炉外に取り出すようにした。移動速度の
異なるメツシュベルト（６）、 （６’ ）間にろう付
け部材の移動はろう材が溶融している状態で行なわれる
ため、取出側の速度をろう付け部材の乗り換え時には加
熱ゾーンと同速度とし、半分以上取出メツシュベルトに
乗った竣は高速とする方式を採用した。取出メツシュベ
ルト端部（加熱ゾーン側）は上下動する方式を取り、メ
ツシュベルト間の乗換えをスムーズに行なっＩこ 。The high-speed extraction zone has a moving speed of 500 to 10,000 seconds.
/min, and the brazed parts were heated to 500℃.
It was decided to take it out of the furnace once the temperature exceeded that level. Since the brazing parts are moved between the mesh belts (6) and (6'), which have different moving speeds, while the brazing metal is molten, the speed on the extraction side should be set to the same speed as the heating zone when changing the brazing parts. We adopted a system in which the completion speed is high when more than half of the material has been removed from the mesh belt. The end of the extraction mesh belt (heating zone side) moves up and down, allowing smooth transfer between mesh belts.
またろう付け炉から冷却装置への乗りかえも同上の方式
で同期させて行なった。冷却装置は人気をファンでろう
付け部材にあてる方式と水スプレーを吹き付ける方式を
とった。The changeover from the brazing furnace to the cooling system was also performed in synchronization using the same method as above. The cooling system uses two popular methods: one that uses a fan to hit the brazed parts, and the other that uses water spray.
このようにしてＪＩＳ ６９５１合金板（厚さ２．Ｏａ
＋＋）を６００ ’Ｃに加熱した後、第１表に示す条件
で炉外に取出し、冷却装置により冷却した。これについ
て４日間放置した後、引張試験により引張強さを測定し
た。また５％ＮａＣ，ｆ！液中で白金電極を対極として
電流密度’１ｍＡ／ｃｉで１時間アノード電解を行ない
、断面の組織観察により粒界腐食の発生の有無を調べた
。その結果を第１表に併記した。In this way, JIS 6951 alloy plate (thickness 2.Oa
++) was heated to 600'C, then taken out of the furnace under the conditions shown in Table 1, and cooled by a cooling device. After this was left for 4 days, the tensile strength was measured by a tensile test. Also 5% NaC, f! Anodic electrolysis was performed in the solution for 1 hour at a current density of 1 mA/ci using a platinum electrode as a counter electrode, and the presence or absence of intergranular corrosion was investigated by observing the structure of the cross section. The results are also listed in Table 1.
第１表から明らかなように、５００℃以上の温度より炉
外に取出し、冷却装置で１００℃／ｍｉｎ以上の速度で
冷却した本発明方法Ｎα１〜５によるものは、何れも引
張強さが高く、粒界腐食を生ぜず、従来方法ＮＱＩＯに
比較し、はるかに優れていることが判る。As is clear from Table 1, the products according to the present invention method Nα1 to Nα5, which were taken out of the furnace from a temperature of 500°C or higher and cooled at a rate of 100°C/min or higher with a cooling device, had high tensile strength. It can be seen that this method does not cause intergranular corrosion and is far superior to the conventional method NQIO.
これに対し加熱炉からの引出温度が５００℃より低い比
較方法Ｎα５〜７及び取出温度から２００℃までの平均
冷却速度が１００ ’Ｃ／ｍｉｎより低い比較方法Ｎｏ
、 ８〜９は何れも強度が低く、特に比較方法Ｎα７〜
９では粒界腐食を生ずることが判る。On the other hand, Comparative Methods No. 5 to 7 in which the drawing temperature from the heating furnace is lower than 500°C and Comparative Method No.
, 8 to 9 all have low strength, especially comparison method Nα7 to
9, it can be seen that intergranular corrosion occurs.
実施例（２）
実施例（１）−と同様にしてＪＩＳ ３００３合金板（
厚さ２．０ｍ＞を６００℃に加熱した後第２表に示す条
件で炉外に取出し、冷却装置により冷却した。Example (2) JIS 3003 alloy plate (
2.0 m thick was heated to 600° C., then taken out of the furnace under the conditions shown in Table 2, and cooled by a cooling device.
これについて実施例（１）と同様にして引張強ざと粒界
腐食の発生を調べた。その結果を第２表に示す。Regarding this, tensile strength and occurrence of intergranular corrosion were investigated in the same manner as in Example (1). The results are shown in Table 2.
第２表から明らかなように、３００３合金は非熱処理型
の合金のため本発明方法による強度の向上は望めないが
、５００℃以上の温度より炉外に取出し、冷却装置によ
って１００℃／ｍｉｎ以上の冷却速度で冷却した本発明
製造法によるものは、粒界腐食感受性が顕著に低下する
ことが判る。As is clear from Table 2, since the 3003 alloy is a non-heat treated alloy, it cannot be expected that the strength of the 3003 alloy can be improved by the method of the present invention. It can be seen that the susceptibility to intergranular corrosion is significantly reduced in the production method of the present invention, which is cooled at a cooling rate of .
このように本発明によればｌ又はＡｌ合金の非腐食性フ
ラックスろう付け法において熱処理合金を使用し、薄肉
高強度材からなる熱交換器の製造が可能となり、従来か
ら使用されているプレージングシートの芯材であるＪＩ
Ｓ ３００３合金（Ａｌ−Ｍｎ系〉の粒界腐食感受性を
低くすることができる等工業上顕著な効果を奏するもの
である。As described above, according to the present invention, it is possible to manufacture a heat exchanger made of a thin, high-strength material by using a heat-treated alloy in a non-corrosive flux brazing method for Al or Al alloy, and it is possible to manufacture a heat exchanger made of a thin-walled high-strength material. JI, the core material of the sheet
This has industrially significant effects such as being able to lower the intergranular corrosion susceptibility of S3003 alloy (Al-Mn type).
第１図は本発明における連続炉の加熱ゾーンと炉外取出
の搬送・搬出系統の一例を示す説明図、第２図は従来の
非腐食性フラックスろう付け炉の一例を示す説明図、第
３図はコンデンサーの一例を示す正面図、第４図はラジ
ェーターの一例を示す斜視図である。
１、予熱ゾーン
２、加熱ゾーン
３、冷却ゾーン
４、入口
５、出口
６、６’ 、メツシュベルト
７．７’、ｒ＋ガス供給口
８゜乾式洗浄装置
９、押出多穴管
１０、フィン
１１、電縫チューブ
１２、フィン
１３、ヘッダー
１４、タンクFIG. 1 is an explanatory diagram showing an example of the heating zone of the continuous furnace and the conveyance/export system for taking out of the furnace in the present invention, FIG. 2 is an explanatory diagram showing an example of a conventional non-corrosive flux brazing furnace, and FIG. The figure is a front view showing an example of a condenser, and FIG. 4 is a perspective view showing an example of a radiator. 1, preheating zone 2, heating zone 3, cooling zone 4, inlet 5, outlet 6, 6', mesh belt 7.7', r+ gas supply port 8° dry cleaning device 9, extruded multi-hole tube 10, fin 11, electric Sewn tube 12, fin 13, header 14, tank
Claims (2)
の不活性ガス雰囲気としたろう付け用連続炉内に、Ａｌ
又はＡｌ合金からなるろう付け部材を搬入移送して加熱
ろう付けする非腐食性フラックスろう付け方法において
、加熱ろう付けしたろう付け部材を５００℃以上の温度
で別系統の搬出系に移載し、急速に炉外に取出し、冷却
装置に導入して急速に冷却することを特徴とするＡｌ又
はＡｌ合金の非腐食性フラックスろう付け方法。(1) Al
Or, in a non-corrosive flux brazing method in which a brazing member made of an Al alloy is carried in and transferred and heat-brazed, the heat-brazed brazing member is transferred to a separate delivery system at a temperature of 500°C or higher, A non-corrosive flux brazing method for Al or Al alloy, characterized by rapidly taking it out of the furnace and introducing it into a cooling device for rapid cooling.
００℃から２００℃まで１００℃／ｍｉｎ以上の冷却速
度で冷却する請求項（１）記載のＡｌ又はＡｌ合金の非
腐食性フラックスろう付け方法。(2) Place the heat-brazed brazing parts in the cooling device for 5 minutes.
2. The non-corrosive flux brazing method for Al or Al alloy according to claim 1, wherein cooling is performed from 00°C to 200°C at a cooling rate of 100°C/min or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20531888A JPH0255663A (en) | 1988-08-18 | 1988-08-18 | Non-corrosive flux brazing method of al or al alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20531888A JPH0255663A (en) | 1988-08-18 | 1988-08-18 | Non-corrosive flux brazing method of al or al alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0255663A true JPH0255663A (en) | 1990-02-26 |
Family
ID=16504964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20531888A Pending JPH0255663A (en) | 1988-08-18 | 1988-08-18 | Non-corrosive flux brazing method of al or al alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0255663A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5333776A (en) * | 1993-09-30 | 1994-08-02 | Air Products And Chemicals, Inc. | Atmospheres for brazing aluminum and aluminum alloys |
-
1988
- 1988-08-18 JP JP20531888A patent/JPH0255663A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5333776A (en) * | 1993-09-30 | 1994-08-02 | Air Products And Chemicals, Inc. | Atmospheres for brazing aluminum and aluminum alloys |
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