JPS5941433A - Aluminum-magnesium alloy for casting - Google Patents
Aluminum-magnesium alloy for castingInfo
- Publication number
- JPS5941433A JPS5941433A JP15171782A JP15171782A JPS5941433A JP S5941433 A JPS5941433 A JP S5941433A JP 15171782 A JP15171782 A JP 15171782A JP 15171782 A JP15171782 A JP 15171782A JP S5941433 A JPS5941433 A JP S5941433A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- casting
- aluminum
- magnesium
- stress corrosion
- 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.)
- Granted
Links
Landscapes
- Prevention Of Electric Corrosion (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は鋳物用アルミニウムーマグネシウム合金に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aluminum-magnesium alloy for casting.
マグネシウムを主要合金成分として含む鋳物用アルミニ
ウム合金はすぐれた機械的性質と耐食性を有し、また陽
極酸化処理も可能であるので船舶用部品、外装材などに
使用されている。Aluminum alloys for casting containing magnesium as a main alloying component have excellent mechanical properties and corrosion resistance, and can be anodized, so they are used for ship parts, exterior materials, etc.
この系の合金はマグネシウムの含有量が多くなるにつれ
て、よシーそう強度が高くなるので上記した用途のほか
に構造材等への用途拡大も期待されるが一方において応
力腐食割れを起し易くなるので応力下での使用を行なう
場合にはマグネシウム量を5%以上含ませることは行わ
れない。As the magnesium content of this type of alloy increases, its strength increases, so it is expected that its use will expand to structural materials in addition to the above-mentioned uses, but on the other hand, it becomes more susceptible to stress corrosion cracking. Therefore, when used under stress, magnesium should not be contained in an amount of 5% or more.
発明者らはマグネシウム5%以上を含む鋳物用アルミニ
ウム合金における応力腐食割れ防止について鋭意研究を
進めた結果、この系の合金に亜鉛、珪素の適量を添加共
存せしめると応力腐食割れ防止に効果があること、!た
さらに適量の亜鉛、珪素と共に適量のマンガンを添加含
有させるときは−そうその応力腐食防止にすぐれた効果
を発揮するととを見出した。The inventors conducted intensive research on preventing stress corrosion cracking in aluminum alloys for castings containing 5% or more of magnesium, and found that adding appropriate amounts of zinc and silicon to this type of alloy is effective in preventing stress corrosion cracking. thing,! Furthermore, it has been found that when an appropriate amount of manganese is added together with an appropriate amount of zinc and silicon, an excellent effect is exhibited in preventing stress corrosion.
即ち2本発明はマグネシウム5,0〜9.0 %珪素0
.5〜1.2%、亜鉛0.′5〜1.5%、マンガン0
.1〜0.6チを含み、残部アルミニウムおよび不純物
からなる鋳物用アルミニウムーマグネシウム合金である
。That is, the present invention contains 5.0 to 9.0% magnesium and 0% silicon.
.. 5-1.2%, zinc 0. '5-1.5%, manganese 0
.. This is an aluminum-magnesium alloy for foundry use, containing 1 to 0.6 g of aluminum, with the balance being aluminum and impurities.
本発明による鋳物用アルミニウムーマグネシウム合金は
5%以上のマグネシウムを含む合金において最も問題と
されていた応力腐食割れ傾向を大巾に改善することがで
きるので合金の有するすぐれた機械的性質や陽極皮膜性
と相俟って建築、車輛等の構造材としてその用途拡大が
期待される。The aluminum-magnesium alloy for casting according to the present invention can greatly improve the tendency to stress corrosion cracking, which has been the most problematic problem in alloys containing 5% or more magnesium. Due to its excellent properties, its use as a structural material for buildings, vehicles, etc. is expected to expand.
次に本発明の鋳物用合金における各合金成分の組成範囲
を定めた理由について述べる。Next, the reason for determining the composition range of each alloy component in the foundry alloy of the present invention will be described.
マグネシウムは合金に強度を附与し、また溶湯の流動性
を改善する。5%未満では構造材な材等への使用に適さ
ない。Magnesium imparts strength to the alloy and also improves the fluidity of the molten metal. If it is less than 5%, it is not suitable for use in structural materials.
珪素はダイカスト性を改善すると共に後述うる亜鉛の添
加と相俟って応力腐食割れ防止効果を有する。珪素0,
5チ未満ではその効果が十分でなく1.2%を超えると
機械的性質9%に靭性を低下し、また陽極皮膜を施した
場合に皮膜の光輝性を劣化させる。Silicon not only improves die-casting properties, but also has the effect of preventing stress corrosion cracking in combination with the addition of zinc, which will be described later. Silicon 0,
If the content is less than 5%, the effect will not be sufficient, and if it exceeds 1.2%, the mechanical properties will decrease in toughness to 9%, and when an anodic coating is applied, the brightness of the coating will deteriorate.
亜鉛は珪素の添加と相俟って耐応力腐食割れ性を改善す
る。0.3%未満ではその改善効果に乏しく、また1、
5%を超えると合金の耐食性をマンガンは合金中に不純
物として存在する鉄と共存することによって鋳造後の合
金組織中にアルミニウムー鉄−マンガン系の球状化合物
を生成シ、このためアルミニウムー鉄系針状化合物の生
成が抑制され1合金の機械的性質や耐食性が改善され、
また本発明における珪素、亜鉛添加に基づく応力腐食割
れ抑制の効果を助長する。0.1%未満ではその効果が
十分でなく0.6チを超えるとA 13− M n系化
合物を生じ1機械的性質を低下させる。Zinc improves stress corrosion cracking resistance in combination with the addition of silicon. If it is less than 0.3%, the improvement effect is poor, and 1.
If it exceeds 5%, the corrosion resistance of the alloy will decrease.Manganese coexists with iron, which is present as an impurity in the alloy, and forms aluminum-iron-manganese-based spherical compounds in the alloy structure after casting. The formation of needle-like compounds is suppressed and the mechanical properties and corrosion resistance of the alloy are improved.
It also promotes the effect of suppressing stress corrosion cracking based on the addition of silicon and zinc in the present invention. If it is less than 0.1%, the effect is not sufficient, and if it exceeds 0.6%, an A 13-M n-based compound is produced, which deteriorates the mechanical properties.
合金中に不純物として含まれる鉄はA4−Fe針状化合
物を生じ機械的性質や耐食性を劣化させるため0.5−
以下で出来る丈は少量に抑えることが望ましい。Iron contained as an impurity in the alloy forms A4-Fe acicular compounds and deteriorates mechanical properties and corrosion resistance.
It is desirable to keep the length that can be made below to a small amount.
次に本発明の合金のいくつかの実施例について述べる。Next, some examples of the alloy of the present invention will be described.
第1表は本実施例に用いた鋳物用アルミニウムーマグネ
シウム合金の化学組成を示すものであるO
以上述べたように本発明の鋳物用アルミニウムーマグネ
シウム合金は従来マグネシウム量を増大させると機械的
性質が向上するにか\わらず応力腐食割れ傾向も増大す
るので工業的用途の拡大が抑制されているこの種合金に
ついて応力腐食割れ寿命を大巾に改善し、栴造材等への
用途拡大が期待されるのでその工業的効果は大きい。Table 1 shows the chemical composition of the aluminum-magnesium alloy for casting used in this example. However, the stress corrosion cracking tendency of this type of alloy increases even though the stress corrosion cracking tendency increases, so the expansion of industrial applications has been suppressed.The stress corrosion cracking life of this type of alloy has been greatly improved, and the application can be expanded to ceramic materials, etc. Therefore, its industrial effects are great.
特許出願人 日本軽金属株式会社Patent applicant: Nippon Light Metal Co., Ltd.
Claims (1)
0.5〜1.2%、亜鉛0.3〜1.5チマンガン0.
1〜0.6 %を含み、残部アルミニウムおよび不純物
からなる鋳物用アルミニウムーマグネシウム合金。(1) Magnesium 5.0-9.0%, silicon 0.5-1.2%, zinc 0.3-1.5, thimanganese 0.
An aluminum-magnesium alloy for casting, containing 1 to 0.6%, with the balance consisting of aluminum and impurities.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15171782A JPS5941433A (en) | 1982-09-02 | 1982-09-02 | Aluminum-magnesium alloy for casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15171782A JPS5941433A (en) | 1982-09-02 | 1982-09-02 | Aluminum-magnesium alloy for casting |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5941433A true JPS5941433A (en) | 1984-03-07 |
JPH0239579B2 JPH0239579B2 (en) | 1990-09-06 |
Family
ID=15524739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15171782A Granted JPS5941433A (en) | 1982-09-02 | 1982-09-02 | Aluminum-magnesium alloy for casting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5941433A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63117606U (en) * | 1987-01-27 | 1988-07-29 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS545810A (en) * | 1977-06-16 | 1979-01-17 | Kubota Ltd | Aluminium alloy for casting |
JPS56169745A (en) * | 1980-05-31 | 1981-12-26 | Kobe Steel Ltd | A -mg base alloy |
JPS57101654A (en) * | 1980-12-16 | 1982-06-24 | Kobe Steel Ltd | Preparation of al-mg series alloy |
-
1982
- 1982-09-02 JP JP15171782A patent/JPS5941433A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS545810A (en) * | 1977-06-16 | 1979-01-17 | Kubota Ltd | Aluminium alloy for casting |
JPS56169745A (en) * | 1980-05-31 | 1981-12-26 | Kobe Steel Ltd | A -mg base alloy |
JPS57101654A (en) * | 1980-12-16 | 1982-06-24 | Kobe Steel Ltd | Preparation of al-mg series alloy |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63117606U (en) * | 1987-01-27 | 1988-07-29 |
Also Published As
Publication number | Publication date |
---|---|
JPH0239579B2 (en) | 1990-09-06 |
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