JPH01157766A - Manufacture of high strength al alloy made heat exchanger - Google Patents
Manufacture of high strength al alloy made heat exchangerInfo
- Publication number
- JPH01157766A JPH01157766A JP31573287A JP31573287A JPH01157766A JP H01157766 A JPH01157766 A JP H01157766A JP 31573287 A JP31573287 A JP 31573287A JP 31573287 A JP31573287 A JP 31573287A JP H01157766 A JPH01157766 A JP H01157766A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- heat exchanger
- brazing
- structural member
- 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
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000005219 brazing Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 239000011162 core material Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 10
- 239000000956 alloy Substances 0.000 description 10
- 229910001316 Ag alloy Inorganic materials 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- 229910019752 Mg2Si Inorganic materials 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000003353 gold alloy Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002244 precipitate Substances 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、高強度を有するＡｇ合金製熱交換器の製造
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a high strength Ag alloy heat exchanger.
従来、一般に、ＡＪ７合金製熱交換器が、フィン材や管
材などの構造部材として、各種のＡＪ金合金構成された
板材や、これらのＡｌ合金板材を芯材とし、これにろう
材としてのＡｌ１−８ｉ系合金を皮材としてクラッドし
てなるブレージングシートを用い、これらの構造部材を
所定の形状に組立て、真空中あるいは不活性ガス雰囲気
中で、フラックスを用い、あるいはフラックスなしでろ
う付けを行ない、ろう付け加熱後、例えば窒素雰囲気中
において、５〜１０分かけて室温まで冷却することによ
り製造されていることは良く知られるところである。Conventionally, heat exchangers made of AJ7 alloy have generally used plates made of various AJ gold alloys or Al alloy plates of these as the core material as structural members such as fin materials and tube materials, and Al1 as the brazing material. -Using a brazing sheet clad with 8i alloy as a skin material, these structural members are assembled into a predetermined shape and brazed with or without flux in a vacuum or inert gas atmosphere. It is well known that, after heating for brazing, it is manufactured by cooling to room temperature over 5 to 10 minutes, for example, in a nitrogen atmosphere.
一方、近年、Ａｌ合金製熱交換器に対しても、より一段
の軽量化、小型化、および高性能化が強く望まれるよう
になってきたが、上記の従来法で製造されたＡｌ合金製
熱交換器では、構造部材の強度不足が原因でこれに十分
に対応することができないのが現状である。On the other hand, in recent years, there has been a strong desire for aluminum alloy heat exchangers to be even lighter, more compact, and have higher performance. Currently, heat exchangers cannot adequately cope with this problem due to insufficient strength of their structural members.
そこで、本発明者等は、上述のような観点から、Ａｇ合
金製熱交換器の構造部材の強化をはかるべく研究を行な
った結果、合金成分として少なくともＭｇとＳＩを含有
するＡｌ合金を特定し、これの板材およびこれを芯材と
するブレージングシートをＡｆｉ合金製熱交換器の構造
部材として用い、かつこれらの構造部材を熱交換器に組
立て、ろう付けした後の冷却過程で、所定温度に所定時
間保持すると、前記構造部材の素地中には、微細均一に
Ｍｇ２５１の金属間化合物が析出するようになり、この
結果構造部材は著しく高い強度をもつようになるという
知見を得たのである。Therefore, from the above-mentioned viewpoint, the present inventors conducted research to strengthen the structural members of Ag alloy heat exchangers, and as a result, they identified an Al alloy containing at least Mg and SI as alloy components. This plate material and a brazing sheet with this as a core material are used as structural members of an Afi alloy heat exchanger, and these structural members are assembled into a heat exchanger and heated to a predetermined temperature in the cooling process after being brazed. They found that when held for a predetermined period of time, an intermetallic compound of Mg251 will precipitate finely and uniformly in the matrix of the structural member, and as a result, the structural member will have significantly high strength.
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、Ａｇ合金製熱交換器の構造部材として、少なくとも
Ｍｇ：０．２〜１．５％、およびＳｉ 二０．３〜１．
５％を含有するＡｌ合金板材（以上重量％、以下％は重
量％を示す）、並びにこのＡｌ１合金板材を芯材とする
ブレージングシートを用い、この構造部材を組立て、ろ
う付けしてＡｎ）合金製熱交換器を製造するに際して、
ろう付け加熱後の冷却途中における１８０〜２７０℃の
温度に１０〜６０分間保持してＭ ｇ ２ Ｓ ｉの金
属間化合物を析出せしめ、もって構造部材の強化をはか
る高強度Ａｌ１合金製熱交換器の製造法に特徴を有する
ものである。This invention was made based on the above findings, and the structural members of the Ag alloy heat exchanger contain at least 0.2 to 1.5% Mg and 0.3 to 1% Si.
Using an Al alloy plate material containing 5% (the above weight %, below % indicates weight %) and a brazing sheet having this Al1 alloy plate material as a core material, this structural member is assembled and brazed to produce an An) alloy. When manufacturing heat exchangers,
A high-strength Al1 alloy heat exchanger that is maintained at a temperature of 180 to 270°C for 10 to 60 minutes during cooling after brazing heating to precipitate an intermetallic compound of M g 2 Si, thereby strengthening the structural member. It is characterized by its manufacturing method.
なお、この発明の方法において、構造部材を構成するＡ
ｆｉ合金のＭｇおよびＳｉ含有量を、それぞれＭｇ：０
．２〜１．５％、およびＳｉ：０．３〜１．５％と限定
したのは、その含有量がＭｇ：０．２％未満およびＳＩ
：０．３％未満ではＭ ｇ ２ Ｓ ｌの析出が不十分
で所望の高強度を確保することができず、一方その含有
量がいずれも１．５％を越えると、高温強度が低下する
ようになり、ろう付け時に変形し易くなるという理由に
よるものであり、またろう付け加熱後の冷却途中におけ
る保持温度を１８０〜２７０℃に定めたのは、その温度
が１８０℃未満では、所定のＭｇ２５１を析出させるの
に長時間を要し、実用的でなく、一方その温度が２７０
℃を越えると、Ｍ ｇ ２ Ｓ ｉ析出による強化現象
が起らないという理由からであり、さらに同じく保持時
間を１０〜６０分に定めたのは、その時間が１０分未満
ではＭｇ２５ｔの析出が不十分で所望の強化をはかるこ
とができず、一方ＢＯ分を越えて保持してもより一層の
向上効果が見られず、むしろ製造工程上問題が生じるよ
うになるという理由にもとづくものである。この場合、
保持温度は一定にする必要はなく、１８０〜２７０℃の
温度範囲に１０〜６０分間存在せしめればよい。In addition, in the method of this invention, A constituting the structural member
The Mg and Si contents of the fi alloy were set to Mg:0, respectively.
．． 2 to 1.5% and Si: 0.3 to 1.5% are limited to Mg: less than 0.2% and Si: 0.3 to 1.5%.
: If the content is less than 0.3%, the precipitation of Mg2Sl will be insufficient and the desired high strength cannot be secured, while if the content exceeds 1.5%, the high temperature strength will decrease. This is because the holding temperature during cooling after brazing heating was set at 180 to 270°C.If the temperature is less than 180°C, It takes a long time to precipitate Mg251, making it impractical;
This is because the strengthening phenomenon due to Mg2Si precipitation does not occur if the temperature exceeds 10°C, and the reason why the holding time was set at 10 to 60 minutes is that if the holding time is less than 10 minutes, Mg25t precipitation will not occur. This is based on the reason that if it is insufficient, the desired strengthening cannot be achieved, and on the other hand, even if it is held in excess of the BO content, no further improvement effect will be seen, but rather problems will arise in the manufacturing process. . in this case,
The holding temperature does not need to be constant, and may be kept in a temperature range of 180 to 270°C for 10 to 60 minutes.
つぎに、この発明の方法を実施例により具体的に説明す
る。Next, the method of the present invention will be specifically explained using examples.
それぞれ第１表に示される成分組成および厚さを有する
ブレージングシートＡ−ＣおよびＡｌ１合金板材りを、
通常の条件での溶解、鋳造、熱間圧延、および冷間圧延
にて製造し、ついでこれらの板材に対して、通常のろう
付けに相当する条件、すなわち窒素雰囲気中、温度＝６
００℃に１０分間保持の条件での加熱処理を施し、この
加熱処理における冷却を、
（ａ） 窒素雰囲気中、１０分間で室温まで冷却（以
下、従来法という）、
（ｂ） 窒素雰囲気中、上記（ａ）条件と同じ冷却速
度で室温まで冷却する途中、温度：２００℃に５０分間
保持（以下、本発明法ｌという）、
（ｃ） 窒素雰囲気中、上記（ａ）条件と同じ冷却速
度で室温まで冷却する途中、温度：２５０℃に２０分間
保持（以下、本発明法２という）、
以上（ａ）〜（ｃ）の条件で行ない、冷却後の板材の引
張特性を測定した。これらの測定結果を第１表に示した
。Brazing sheets A-C and Al1 alloy plates having the compositions and thicknesses shown in Table 1, respectively, were
Manufactured by melting, casting, hot rolling, and cold rolling under normal conditions, then these plates are subjected to conditions equivalent to normal brazing, that is, in a nitrogen atmosphere at a temperature of 6.
Heat treatment was performed under the conditions of holding at 00°C for 10 minutes, and cooling during this heat treatment was performed by (a) cooling to room temperature in a nitrogen atmosphere for 10 minutes (hereinafter referred to as conventional method), (b) in a nitrogen atmosphere, Temperature: Maintained at 200°C for 50 minutes during cooling to room temperature at the same cooling rate as in the above (a) condition (hereinafter referred to as the present invention method 1); (c) In a nitrogen atmosphere, at the same cooling rate as in the above (a) condition. During cooling to room temperature, the temperature was maintained at 250°C for 20 minutes (hereinafter referred to as method 2 of the present invention) under the conditions (a) to (c) above, and the tensile properties of the plate material after cooling were measured. The results of these measurements are shown in Table 1.
第１表に示される結果から、ろう付け加熱後、本発明法
１，２で冷却した場合、従来法で冷却された場合に比し
て、へΩ合金製熱交換器の構造部材となる板材は一段と
高い強度をもつようになることが明らかである。From the results shown in Table 1, when cooling by methods 1 and 2 of the present invention after brazing heating, compared to when cooling by the conventional method, the plate material that becomes a structural member of the Hemega alloy heat exchanger It is clear that the material has even higher strength.
上述のように、この発明の方法によれば、ろう付け加熱
後の冷却条件を特定することによりＡｇ合金製熱交換器
を構成する構造部材を強化することができ、この結果と
して高強度を有するＡＩ）合金製熱交換器が製造できる
ようになるのである。As described above, according to the method of the present invention, the structural members constituting the Ag alloy heat exchanger can be strengthened by specifying the cooling conditions after brazing heating, and as a result, the structural members that make up the Ag alloy heat exchanger have high strength. AI) Alloy heat exchangers can now be manufactured.
Claims (1)
ｇ：０．２〜１．５重量％、およびＳｉ：０．３〜１．
５重量％を含有するＡｌ合金板材、並びにこのＡｌ合金
板材を芯材とするブレージングシートを用い、この構造
部材を組立て、ろう付けすることによりＡｌ合金製熱交
換器を製造するに際して、ろう付け加熱後の冷却途中に
おける１８０〜２７０℃の温度に１０〜６０分間保持す
ることを特徴とする高強度Ａｌ合金製熱交換器の製造法
。As a structural member of an Al alloy heat exchanger, at least M
g: 0.2-1.5% by weight, and Si: 0.3-1.
When manufacturing an Al alloy heat exchanger by assembling and brazing these structural members using an Al alloy plate material containing 5% by weight and a brazing sheet having this Al alloy plate material as a core material, brazing heating is performed. A method for manufacturing a high-strength Al alloy heat exchanger, characterized by maintaining the temperature at 180 to 270° C. for 10 to 60 minutes during subsequent cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31573287A JPH01157766A (en) | 1987-12-14 | 1987-12-14 | Manufacture of high strength al alloy made heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31573287A JPH01157766A (en) | 1987-12-14 | 1987-12-14 | Manufacture of high strength al alloy made heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01157766A true JPH01157766A (en) | 1989-06-21 |
Family
ID=18068867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31573287A Pending JPH01157766A (en) | 1987-12-14 | 1987-12-14 | Manufacture of high strength al alloy made heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01157766A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991013719A1 (en) * | 1990-03-09 | 1991-09-19 | Furukawa Aluminum Co., Ltd. | Brazing sheet comprising brazing material based on aluminum-magnesium-silicon alloy |
| JP2004358519A (en) * | 2003-06-04 | 2004-12-24 | Furukawa Sky Kk | Method for brazing aluminum material |
| JP2005328942A (en) * | 2004-05-19 | 2005-12-02 | Toshiba Tec Corp | Treatment apparatus |
| JP2008100283A (en) * | 2001-09-28 | 2008-05-01 | Furukawa Sky Kk | Method of brazing aluminum or aluminum alloy materials and aluminum alloy brazing sheet |
| JP2014184489A (en) * | 2014-04-18 | 2014-10-02 | T Rad Co Ltd | Aluminum heat exchanger production method |
-
1987
- 1987-12-14 JP JP31573287A patent/JPH01157766A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991013719A1 (en) * | 1990-03-09 | 1991-09-19 | Furukawa Aluminum Co., Ltd. | Brazing sheet comprising brazing material based on aluminum-magnesium-silicon alloy |
| US5234759A (en) * | 1990-03-09 | 1993-08-10 | Furukawa Aluminum Co., Ltd. | Brazing sheet comprising an Al--Mg--Si alloy brazing material |
| JP2008100283A (en) * | 2001-09-28 | 2008-05-01 | Furukawa Sky Kk | Method of brazing aluminum or aluminum alloy materials and aluminum alloy brazing sheet |
| JP4491478B2 (en) * | 2001-09-28 | 2010-06-30 | 古河スカイ株式会社 | Brazing method of aluminum or aluminum alloy material and brazing sheet made of aluminum alloy |
| JP2004358519A (en) * | 2003-06-04 | 2004-12-24 | Furukawa Sky Kk | Method for brazing aluminum material |
| JP4537019B2 (en) * | 2003-06-04 | 2010-09-01 | 古河スカイ株式会社 | Brazing method of aluminum material |
| JP2005328942A (en) * | 2004-05-19 | 2005-12-02 | Toshiba Tec Corp | Treatment apparatus |
| JP2014184489A (en) * | 2014-04-18 | 2014-10-02 | T Rad Co Ltd | Aluminum heat exchanger production method |
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