JPS63179042A - Corrosion-resisting aluminum alloy for die casting - Google Patents
Corrosion-resisting aluminum alloy for die castingInfo
- Publication number
- JPS63179042A JPS63179042A JP1082387A JP1082387A JPS63179042A JP S63179042 A JPS63179042 A JP S63179042A JP 1082387 A JP1082387 A JP 1082387A JP 1082387 A JP1082387 A JP 1082387A JP S63179042 A JPS63179042 A JP S63179042A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- corrosion resistance
- corrosion
- die casting
- aluminum alloy
- 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
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 11
- 238000004512 die casting Methods 0.000 title claims description 15
- 230000007797 corrosion Effects 0.000 claims abstract description 29
- 238000005260 corrosion Methods 0.000 claims abstract description 29
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 abstract description 26
- 239000000956 alloy Substances 0.000 abstract description 26
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 7
- 229910018134 Al-Mg Inorganic materials 0.000 abstract description 6
- 229910018467 Al—Mg Inorganic materials 0.000 abstract description 6
- 229910000765 intermetallic Inorganic materials 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 3
- 239000006104 solid solution Substances 0.000 abstract description 2
- 229910000861 Mg alloy Inorganic materials 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 9
- 239000012925 reference material Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000005496 eutectics Effects 0.000 description 2
- 238000000879 optical micrograph Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 102100029203 F-box only protein 8 Human genes 0.000 description 1
- 101100334493 Homo sapiens FBXO8 gene Proteins 0.000 description 1
- 241000269821 Scombridae Species 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 235000020640 mackerel Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は耐蝕性ダイカスト用アルミニウム合金に関する
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a corrosion-resistant aluminum alloy for die casting.
従来、構造材としてのダイカスト用アルミニウム合金と
しては、Ａｌ−５ｉ−Ｃｕ系のＪＩＳ ＡＤＣ，。、Ａ
ＤＣ，、が−性的に知られており、又耐蝕性ダイカスト
用アルミニウム合金としては、Ａｌ−Ｍｇ系合金のＡＤ
Ｃ５、ＡＤＣ６がＪＩＳに規格化されている。Conventionally, aluminum alloys for die casting as structural materials include Al-5i-Cu based JIS ADC. ,A
DC, is known for its properties, and as a corrosion-resistant aluminum alloy for die casting, the Al-Mg alloy AD
C5 and ADC6 are standardized in JIS.
上記Ａ ｌ −５ｉ −Ｃｕ系合金は、ダイカスト性（
こ優れ、高強度を有していることから複雑な形状をもつ
薄肉鋳物の製造に適しているが、その反面耐蝕性が劣る
為、過酷な腐食環境下にさらされる建築用外装品や化学
装置用部品には使用できず、耐蝕性が要求される場合に
は塗装、金属メッキ等の表面処理を施す必要がある。The above Al-5i-Cu alloy has die-castability (
Due to its excellent strength and high strength, it is suitable for manufacturing thin-walled castings with complex shapes, but on the other hand, its corrosion resistance is poor, so it is used for architectural exterior products and chemical equipment that are exposed to harsh corrosive environments. It cannot be used for industrial parts, and if corrosion resistance is required, surface treatment such as painting or metal plating must be applied.
一方、上記ＡＤＣ５、ＡＤＣ６は耐蝕性を必要とする部
分の鋳物やアルマイト用合金として広く使用されており
、Ａｌ−Ｍｇ２元合金は、工業用純Ａｌに近い優れた耐
蝕性をもつが、金型への焼き付きが激しく、Ｍｇ合金化
によって凝固温度範囲が広がる為、鋳造割れ、湯流れ性
に問題があり、それ故、ＡＤＣ６では１％以下のＳｉと
微量のＮｌｎ、Ｆｅを添加することによって鋳造性を改
善すると共に強度の向上をはかり実用に供している。On the other hand, the above ADC5 and ADC6 are widely used as alloys for castings and alumite in parts that require corrosion resistance, and the Al-Mg binary alloy has excellent corrosion resistance close to that of industrial pure Al, but As the solidification temperature range expands due to Mg alloying, there are problems with casting cracks and melt flow. Therefore, in ADC6, by adding less than 1% Si and trace amounts of Nln and Fe, casting It has been put into practical use by improving its properties and strength.
又、 ＡＤＣ５では、１．８％以下のＦｅを添加するこ
とによって金型への焼き付きを抑制し、ダイカストを可
能（こしている。In addition, in ADC5, by adding 1.8% or less of Fe, seizure to the mold is suppressed and die casting is possible.
このように、ＡＪ−Ｍｇ系ダイカスト用合金は、耐蝕性
を損なわずに鋳造性及び強度を向上させる為に比較的少
量のＳｉ 、 Ｆｅ ＳＭｎ等の元素を単独、あるいは
複合添加して実用合金としている。In this way, AJ-Mg die casting alloys are made into practical alloys by adding relatively small amounts of elements such as Si, Fe, SMn, etc. singly or in combination in order to improve castability and strength without impairing corrosion resistance. There is.
しかしながら、耐蝕性に主眼をおくこれらの合金は、Ａ
ＤＣ１０、ＡＤＣ１２に比べ引張強度、耐力、弾性率
が全般的（こ低い為、ケースやカバー等の装飾部品（こ
は使用し得るもの又構造材としては適用範囲が制限され
る問題点がある。However, these alloys, which focus on corrosion resistance,
Compared to DC10 and ADC12, the tensile strength, yield strength, and elastic modulus are generally lower, so there is a problem that the range of application is limited as decorative parts such as cases and covers, and as structural materials.
本発明は上記従来の問題点を解消しようとしたもので、
従来、Ａｌ？−Ｍｇ系合金において、Ｍｎは微量添加さ
れるにとｙまっていたが、本発明ではＮｉ ｎ ： ４
．５〜８ｗｔ％を含むＡＪ基合金に、共晶点組成に近い
２ｗｔ％前後のＭｎを添加すること（こより、合金中に
金属間化合物ＡＪｓＭｎを形成させ、引張強度、弾性率
を向上させると共に、Ａ、／６Ｍｎ中にＦｅ等の耐蝕性
に有害な元素を固溶するので耐蝕性が向上し、更にＭｎ
の添加ζこよってＡｌ −Ｍｇ系合金の鋳造性を改善し
得るようにした優れた耐蝕性と構造材として使用し得る
高強度を有するダイカスト用アルミニウム合金を提供す
ることを、その目的とする。The present invention attempts to solve the above-mentioned conventional problems.
Conventionally, Al? - In Mg-based alloys, Mn has been added in small amounts, but in the present invention, Ni n: 4
．． Adding around 2 wt% of Mn, which is close to the eutectic point composition, to an AJ-based alloy containing 5 to 8 wt% (thereby forming an intermetallic compound AJsMn in the alloy, improving tensile strength and elastic modulus, A, /6 Since elements harmful to corrosion resistance such as Fe are dissolved in Mn, corrosion resistance is improved, and Mn
The object of the present invention is to provide an aluminum alloy for die casting which has excellent corrosion resistance and high strength that can be used as a structural material by improving the castability of Al-Mg alloys.
即ち本発明は、Ｍｎ ： １．８〜３．０ｗ １％と、
Ｍｇ４５〜８０ｗｔ％とを含有し、残部がＡｌ及び不可
避的不純物からなり、もって上記問題点を解決したので
ある。That is, the present invention has Mn: 1.8 to 3.0w 1%,
The above problem was solved by containing 45 to 80 wt% of Mg, with the remainder being Al and unavoidable impurities.
次に本発明合金の組成範囲）こつき詳述する。Next, the composition range of the alloy of the present invention will be explained in detail.
Ｍｇ ： ４．５〜８Ｗ １％、Ｍｎ ： １．８〜３
．０ｗｔ％、残部をＡｌと不町避的不純物とする。Mg: 4.5~8W 1%, Mn: 1.8~3
．． 0 wt%, and the remainder is Al and unavoidable impurities.
又、 Ｍｇ ： ４．５〜８ｗ １％、 Ｍｎ １８〜
３．Ｑ ｗｔ％（こ、 Ｔｉ ：０．０１−０．３ Ｗ
１％、Ｂ ： ０．００１〜０．１ ｗｔ％、Ｚｒ：
００１〜０．３ｗｔ％のうち何れか一種又は二種以上を
含有し、残部をＡｌと不町避的不純物とする。Also, Mg: 4.5~8w 1%, Mn 18~
3. Q wt% (Ti: 0.01-0.3 W
1%, B: 0.001-0.1 wt%, Zr:
0.001 to 0.3 wt%, and the remainder is Al and unavoidable impurities.
Ａｌ−Ｍｇ系合金において、Ｍｎを共晶点組成に近い２
ｗｔ％前後添加すると、合金中に金属間化合物Ａｌ６Ｍ
ｎを形成させ、引張強度、弾性率が向上する。又Ａ ｌ
ａ Ｍ ｎ中にＦｅ等の耐蝕性に有害な元素を固溶する
から耐蝕性は向上する。更にＳｉｎの添加はＡｌ−〜１
ｇ重合金の鋳造性を改善する効果があるが、Ｍｎの含有
範囲が１８ｗ ｔ％以下では、上述の効果は少なく、３
．Ｏｗ １％を越えると粗大な初晶、Ａｌ５Ｎｌｎが晶
出し機械的性質、被切削性を劣下させる為、含有範囲は
１．８ｗｔ％（Ｍｎ（３，０ｗｔ％とする。In Al-Mg alloys, Mn is set to 2 near the eutectic point composition.
When added around wt%, intermetallic compound Al6M is added in the alloy.
n, and the tensile strength and elastic modulus are improved. Also A l
Corrosion resistance is improved because elements harmful to corrosion resistance, such as Fe, are dissolved in aMn. Furthermore, the addition of Sin is Al-~1
It has the effect of improving the castability of g-heavy alloys, but if the Mn content range is 18wt% or less, the above effect is small, and 3
．． When Ow exceeds 1%, coarse primary crystals, Al5Nln, crystallize and deteriorate mechanical properties and machinability, so the content range is 1.8 wt% (Mn (3.0 wt%).
Ｍｇの添加は、合金の耐蝕性を損なわずに強度、硬さを
増大させることができる。Addition of Mg can increase the strength and hardness of the alloy without impairing its corrosion resistance.
しかし、５ｗｔ％以下の含有では十分な強度が得られず
、８ｗｔ％以上含有するとＭｇの偏析が激しくなり、Ａ
ｌ−Ｍｇ系の化合物を形成し、逆（こ機械的性質が劣下
する。However, if the content is less than 5 wt%, sufficient strength cannot be obtained, and if the content is more than 8 wt%, Mg segregation becomes severe, and A
1-Mg-based compounds are formed, and the mechanical properties are deteriorated.
ＴｉはＢの添加と相俟って結晶粒微細化（こ著しい効果
を有し、鋳造性の改善（こ有効である。Coupled with the addition of B, Ti has a remarkable effect on crystal grain refinement (this is effective) and improves castability (this is effective).
又、Ｔｉ：０．０１ｗ１％、Ｂ：０．００１ｗｔ％以下
では、その効果は少なく、Ｔ ｉ ： ０．３ｗ １％
、Ｂ：０．１ｗｔ％以上では脆い化合物を形成する為、
靭性を低下させる。Moreover, if Ti: 0.01w1% and B: 0.001wt% or less, the effect is small, and Ti: 0.3w1%
, B: At 0.1 wt% or more, a brittle compound is formed, so
Decrease toughness.
Ｚｒは、Ｔｉ、Ｂと同様に結晶粒微細化の効果をもち、
鋳造性、特に鋳造割れ防止に有効であり、０．０１ ｗ
ｔ％以下の含有では、その効果は見られず、０．３ｗ
ｔ％以上含むとｋｌ−Ｚｒ系の化合物を形成し、機械的
性質が劣下する。Like Ti and B, Zr has the effect of grain refinement,
Effective for castability, especially for prevention of casting cracks, 0.01 w
If the content is less than t%, no such effect is observed, and 0.3w
If it is contained in an amount of t% or more, a kl-Zr type compound is formed and the mechanical properties are deteriorated.
以下本発明の実施例と比較例を詳述する。 Examples and comparative examples of the present invention will be described in detail below.
下記の表−１に示す組成の合金溶湯を９０ｔｏｎダイカ
ストマシンを用いて鋳込温度７３０〜７５０℃、金型温
度１１０〜１５０℃、射出速度１３〜１．５ｍ／ｓ。A molten alloy having the composition shown in Table 1 below was cast using a 90 ton die casting machine at a casting temperature of 730 to 750°C, a mold temperature of 110 to 150°C, and an injection speed of 13 to 1.5 m/s.
鋳込圧１９０Ａｉｉ’ｆ ／ｃｒＡ 、チルタイム５秒
の条件で鋳造し、試料扁１〜１１を得た。Casting was carried out under the conditions of a casting pressure of 190Aii'f/crA and a chill time of 5 seconds to obtain sample flats 1 to 11.
他＋ＣＪＩＳ規格によるＡＤＣＩＯ合金、ＡＤＣ６合金
を用いて上記と同一条件で鋳造し、参考材を得た。A reference material was obtained by casting under the same conditions as above using ADCIO alloy and ADC6 alloy according to the CJIS standard.
表−１（Ｗ＋チ）
上記試料４１−１１及び参考材を用いて以下の実験を行
なった。その結果を下記の表−２、表−３に示す。Table 1 (W+CH) The following experiment was conducted using the above sample 41-11 and reference material. The results are shown in Tables 2 and 3 below.
（１）凝固組織の観察
添付図面は試料Ａ２の凝固組織の光学顕微鏡写真（Ｘ５
００）を示す。(1) Observation of coagulation structure The attached drawing is an optical micrograph (X5
00).
写真から明らかな如く、組織は微細に分散した金属間化
合物Ａ１．、Ｍｎ相と、Ｍｇを固溶したＡｌマトリック
スから構成される。又一部ζこＡｌ’とλ１ｇの金属間
化合物が晶出している。As is clear from the photograph, the structure consists of finely dispersed intermetallic compounds A1. , an Mn phase, and an Al matrix containing Mg as a solid solution. In addition, some intermetallic compounds of ζAl' and λ1g are crystallized.
（２）引張試験
ＡＳＴＭ規格（米国規格）引張試片形状の試料７チ１〜
１１及び同様の参考材を用い、鋳放し状態で引張試験を
行なった。(2) Tensile test ASTM standard (US standard) Tensile specimen shape sample 7chi1~
Tensile tests were conducted using No. 11 and similar reference materials in the as-cast state.
（３）硬さ試験
６．３５１１１１Ｉ Ｘ ６．３５鰭Ｘ１０ｉ翼ｔ（厚
さ）の試料／１ｌｌｉ １〜１５及び同様の参考材を用
い、鋳放し状態のビッカース硬さく Ｈｖ ）を測定し
た。(3) Hardness Test Using 6.351111I x 6.35 fin x 10i wing t (thickness) samples/1lli 1 to 15 and similar reference materials, the Vickers hardness (Hv) in the as-cast state was measured.
荷重は２００７である。The load is 2007.
（４）腐食促進試験
６．３５１１１１１ Ｘ ５．３５ ｍ＋ｘＸ ５Ｑｍ
ｍｔの試料、１６１〜７及び同様の参考材を用い腐食促
進試験を行った。(4) Accelerated corrosion test 6.3511111 X 5.35 m+xX 5Qm
Accelerated corrosion tests were conducted using mt samples, 161-7 and similar reference materials.
腐食は連続塩分噴霧によって行ない、腐食状態をレイテ
ィングナンバー（Ｒ，Ｎ）で判定シた。Corrosion was carried out by continuous salt spraying, and the corrosion state was determined by rating numbers (R, N).
表−２１こ示す結果から、本発明合金は、ＡＤＣｌｏと
比べ同程度以上の引張強度と耐力を有し、伸びはＡＤＣ
ＩＯの３〜９倍の値を示す。From the results shown in Table 21, the alloy of the present invention has tensile strength and proof stress comparable to or higher than that of ADClo, and the elongation is lower than that of ADClo.
The value is 3 to 9 times that of IO.
硬サバ、ＡＤＣ６、ＡＤＣＩＯが１００以下であるのに
対し、本発明合金試料／１６５以外は１００以上を示し
、硬さにおいても従来のダイカスト用合金以上であるこ
とが判る。Hard mackerel, ADC6, and ADCIO are 100 or less, whereas all alloys other than the present invention alloy sample /165 show 100 or more, indicating that their hardness is also higher than conventional die-casting alloys.
塩水噴霧試験の４時間におけるレイティングナンバーは
ＡＤＣ６が９．３であるの（こ対し、本発明合金は何れ
も９５以上を示し、従来の耐蝕性ダイカスト用合金と同
等あるいはそれ以上の耐蝕性を有している。The rating number for ADC6 after 4 hours of the salt spray test is 9.3 (on the contrary, all of the alloys of the present invention show a rating of 95 or higher, and have corrosion resistance equal to or higher than conventional corrosion-resistant die-casting alloys). are doing.
以上説明したように本発明ζこ係る耐蝕性ダイカスト用
アルミニウム合金は、従来の耐蝕性ダイカスト用アルミ
ニウム合金に比べて引張強度、耐力が増強されるので伸
び、耐蝕性が良好であり、為に耐蝕性、強度が要求され
る構造材、外装部材に適し、広範な用途に利用できる利
点がある。As explained above, the corrosion-resistant aluminum alloy for die-casting according to the present invention has enhanced tensile strength and yield strength compared to conventional corrosion-resistant aluminum alloys for die-casting, so it elongates and has good corrosion resistance. It is suitable for structural materials and exterior members that require strength and strength, and has the advantage of being usable in a wide range of applications.
添付図面は本発明に係る耐蝕性ダイカスト用アルミニウ
ム合金を用いて鋳造した試料／ｉ６２の凝固組織の光学
顕微鏡写真を示す。
添付図面
（×に５００）The attached drawing shows an optical micrograph of the solidified structure of sample/i62 cast using the corrosion-resistant aluminum alloy for die casting according to the present invention. Attached drawing (×500)
Claims (2)
８．０ｗｔ％とを含有し、残部がＡｌ及び不可避的不純
物からなることを特徴とする耐蝕性ダイカスト用アルミ
ニウム合金。(1) Mn: 1.8~3.0wt%, Mg: 4.5~
8.0 wt%, with the remainder consisting of Al and inevitable impurities.
８．０ｗｔ％の外にＴｉ：０．０１〜０．３ｗｔ％、Ｂ
：０．００１〜０．１ｗｔ％、Ｚｒ：０．０１〜０．３
ｗｔ％のうち何れか一種又は二種以上を含有することを
特徴とする特許請求の範囲第１項記載の耐蝕性ダイカス
ト用アルミニウム合金。(2) Mn: 1.8-3.0wt%, Mg: 4.5-3.0wt%
In addition to 8.0wt%, Ti: 0.01-0.3wt%, B
:0.001~0.1wt%, Zr:0.01~0.3
The corrosion-resistant aluminum alloy for die casting according to claim 1, characterized in that the corrosion-resistant aluminum alloy for die casting contains at least one type or two or more types among wt%.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1082387A JPS63179042A (en) | 1987-01-19 | 1987-01-19 | Corrosion-resisting aluminum alloy for die casting |
| US07/076,435 US4847048A (en) | 1986-07-21 | 1987-07-21 | Aluminum die-casting alloys |
| US07/351,886 US4976918A (en) | 1986-07-21 | 1989-05-15 | Aluminum die-casting alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1082387A JPS63179042A (en) | 1987-01-19 | 1987-01-19 | Corrosion-resisting aluminum alloy for die casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63179042A true JPS63179042A (en) | 1988-07-23 |
| JPH0565572B2 JPH0565572B2 (en) | 1993-09-20 |
Family
ID=11761075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1082387A Granted JPS63179042A (en) | 1986-07-21 | 1987-01-19 | Corrosion-resisting aluminum alloy for die casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63179042A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018127708A (en) * | 2017-02-10 | 2018-08-16 | エス・エス・アルミ株式会社 | Aluminum alloy for casting, aluminum alloy cast product and manufacturing method of aluminum alloy cast product |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5496445A (en) * | 1978-01-18 | 1979-07-30 | Hitachi Cable Ltd | Anticorrosive treating method for structure to seawater |
-
1987
- 1987-01-19 JP JP1082387A patent/JPS63179042A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5496445A (en) * | 1978-01-18 | 1979-07-30 | Hitachi Cable Ltd | Anticorrosive treating method for structure to seawater |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018127708A (en) * | 2017-02-10 | 2018-08-16 | エス・エス・アルミ株式会社 | Aluminum alloy for casting, aluminum alloy cast product and manufacturing method of aluminum alloy cast product |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0565572B2 (en) | 1993-09-20 |
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