JPS61227146A - Aluminum alloy for high pressure casting having superior strength - Google Patents

Abstract

PURPOSE:To eliminate defects caused by segregation, blowholes, inclusions, etc., in high pressure casting and to give superior strength by providing an Al alloy containing specific amounts of Si, Cu, Mn and Mg as principal components. CONSTITUTION:The alloy has a composition consisting of 0.2-1.0% Si, 1-5% Cu, 0.3-1.2% Mn, 0.3-2.0% Mg, and the balance Al with impurities, to which 0.005-0.2% Ti and 0.0005-0.05% B are incorporated, if necessary. The Al alloy is subjected to high pressure casting under a pressure of about 300-3,000kg/cm<2>. This cast Al alloy excels in strength, toughness, isotropy of mechanical properties, etc., so that it can be used for automobile parts and electronic machine-relating parts.

Description

【発明の詳細な説明】 産業上の利用分野 この発明は高圧鋳造用アルミニウム合金、とくに強度と
靭性を有する高圧鋳造用アルミニウム合金に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an aluminum alloy for high-pressure casting, and more particularly to an aluminum alloy for high-pressure casting having strength and toughness.

従来の技術 従来、自動車ホイールなどの自動車部品、ＶＴＲシリン
ダー、あるいはスピンドルパルプ、アクチェエータ−、
サポートなどの外部記憶装置の部品としてはアルミニウ
ム合金の鋳物やアルミニウムる欠陥が多く、強度の面で
信頼性に欠けるとともに、電子関連部品として使用した
場合には例えばＶＴＲの映像が乱れたり、記憶装置の作
動に支障を来すなどの問題がある。Conventional technology Conventionally, automobile parts such as automobile wheels, VTR cylinders, spindle pulp, actuators,
Supports and other parts of external storage devices are often made of aluminum alloy castings and aluminum, which have many defects and are unreliable in terms of strength.If they are used as electronic components, for example, images on a VTR may be distorted, or the storage device may be damaged. There are problems such as interfering with the operation of the

友鍛造材はコヌト亮となる雑豆がある。Tomo Forged Material has miscellaneous beans called Conut Ryo.

発明が解決しようとする問題点 この発明は上記従来の問題を解決し、偏析、巣、介在物
などによる欠陥がなく、強度、靭性、耐摩る。Problems to be Solved by the Invention The present invention solves the above-mentioned conventional problems, and has no defects due to segregation, cavities, inclusions, etc., and has strength, toughness, and wear resistance.

問題点を解決するための手段 ］ノ発明は、Ｓｉ０．２〜１．０％ｖ　Ｃｕ　１〜５％
。Means for Solving the Problem] The invention is based on Si0.2 to 1.0% v Cu 1 to 5%
.

Ｍｎ０．３〜１．２％、　Ｍ　ｇ　０．３〜２．０％を
含み、残部ＡＩおよび不純物からなる高圧鋳造用アルミ
ニウム合金お工びＳｉ０．２〜１−０％ｔ　Ｃｕ　１〜
５％。Aluminum alloy for high-pressure casting containing 0.3-1.2% Mn, 0.3-2.0% Mg, and the balance consisting of AI and impurities Si0.2-1-0%tCu 1-0%
5%.

Ｍｎ０．３〜１．２％、Ｍｇ０．３〜２．０％、　Ｔｉ
　０．００・５〜０．２％、８０．００２〜０．０５％
を含み、残余アルミニウムおよび不純物からなる強度の
すぐれた高圧鋳造用アルミニウム合金を要旨とするもの
である。Mn0.3-1.2%, Mg0.3-2.0%, Ti
0.00.5~0.2%, 80.002~0.05%
The gist of this invention is an aluminum alloy for high-pressure casting with excellent strength, consisting of residual aluminum and impurities.

好ましい組成としてはＳｉ０．８５〜１．０％、Ｃｕ８
、５〜４．５％ｅ　Ｍｎ　０．４〜１．０％、Ｆｉｌ１
ｇ０．４５〜１．０．Ｔｉ０．０１〜０．１５％、Ｂ０
．００１〜０．００５残部アルミニウムおよび不純物か
らなる特許請求の範囲第２項記載の強度のすぐれｔ高圧
鋳造用アルミニウム合金である。The preferred composition is Si0.85-1.0%, Cu8
, 5-4.5%e Mn 0.4-1.0%, Fil1
g0.45-1.0. Ti0.01-0.15%, B0
．． 001 to 0.005, the balance being aluminum and impurities, the aluminum alloy has excellent strength and is for high pressure casting as claimed in claim 2.

以下成分添加元素の電装お工び組成限度の理由について
説明する。The reason for the composition limit for electrical equipment for added elements will be explained below.

Ｓｉ：Ｍｇと共存して強度向上に役立つ成分であるが、
０．２９６より少いと効果が小さく、１．０％全越すと
伸び、靭性を低下させる。０．３〜０．８０％の範囲で
添加するのが好ましい。Si: A component that coexists with Mg and helps improve strength.
If it is less than 0.296, the effect will be small, and if it exceeds 1.0%, it will elongate and reduce toughness. It is preferable to add it in a range of 0.3 to 0.80%.

Ｍｇ：Ｓｉと共存して強度向上に役立つが、０．３％よ
り少いと効果が小さく、１．２％を越えると伸び、靭性
全低下させる。０．３〜１．２％の範囲で添加するのが
好ましい。Mg: Coexists with Si and helps improve strength, but if it is less than 0.3%, the effect is small, and if it exceeds 1.2%, it will elongate and reduce the toughness completely. It is preferable to add it in a range of 0.3 to 1.2%.

Ｃｕ：Ｍｇと共存して強度向上に役立つ。１％より少い
と効果が少く５％を越えると伸びと靭性を低下して好ま
しくない。Cu: Coexists with Mg and helps improve strength. If it is less than 1%, the effect will be small, and if it exceeds 5%, elongation and toughness will decrease, which is not preferable.

Ｍｎ：Ｉｆｉｔ食性、耐応力腐食性、靭性を向上させる
効果があるが、この場合１．２％をこえると伸びと靭性
を低下し、０．８％以下で框惣度向上効果が少ない。Mn: Ifit has the effect of improving corrosion resistance, stress corrosion resistance, and toughness, but if it exceeds 1.2%, elongation and toughness decrease, and if it is 0.8% or less, the effect of improving frame strength is small.

Ｔ　ｉ　ｅ　Ｂ　：　Ｔ　ｉは借景のＢと共存して鋳造
組織を微細化する。高圧凝固鋳造の欠点であるマクロ關
析防止に役立つ。それぞれ０．００５ｑ６および０．０
００２％より少いと効果が小さく、それぞれ０．２％お
よび０．０５％を越えると大きな介在物’Ｉ’　ｉ　Ｂ
　！などが生じ、八−ドスポット等の発生原因になり靭
性、伸びを低下させる。とくにＴ　ｉ　ｅ　Ｂ　’ｓ：
共存させた場合０．０１〜０．１５．Ｂ０．００１〜０
．００５％の範囲で添加するのがより好ましい。Ｔｉ単
独添加ではＴｉｆｉが多くなり０．５％に至ると金属間
化合物を生ずる欠点がある。製造工程について説明する
と、この合金は高圧下で鋳造した場合に鋳造欠陥をなく
し、所期の性能が得られる。加圧条件としてはａＯＯ〜
３０００＆ｌＦ／１４が好ましい。T i e B: T i coexists with borrowed B to refine the casting structure. This helps prevent macroscopic analysis, which is a drawback of high-pressure solidification casting. 0.005q6 and 0.0 respectively
If it is less than 0.02%, the effect is small, and if it exceeds 0.2% and 0.05%, large inclusions 'I' i B
! This causes the occurrence of eight-dot spots, etc., and reduces toughness and elongation. Especially TieB's:
0.01 to 0.15 when coexisting. B0.001~0
．． More preferably, it is added in a range of 0.005%. Addition of Ti alone has the drawback of increasing Tifi and forming intermetallic compounds when the amount reaches 0.5%. Regarding the manufacturing process, this alloy eliminates casting defects when cast under high pressure and achieves the desired performance. The pressurizing conditions are aOO~
3000&lF/14 is preferred.

この圧カニ９低いと収縮巣や割れが発生し易い。If this pressure crab 9 is low, shrinkage cavities and cracks are likely to occur.

またこの限界をこえて高圧にしても巣や割れの目的に応
じて時効処理などの調質が可能である。Furthermore, even if the pressure is increased beyond this limit, it is possible to perform aging treatment and other tempering treatments depending on the purpose of removing cavities and cracks.

実施例 下表に示すアルミニウム合金を圧力１０００＆９／ｄで
金型に高圧鋳造し長さ１００φ×２００長さ鱈の棒材と
し、この棒材からＪＩＳ４号引張り試験片を切り出して
熱処理後引張り試験を行っｔｏこの高圧下で鋳造した発
明合金には巣や割れなどの欠陥は見られなかっ几。一方
翫１の合金を大気圧の下で金型鋳造し几場合Ｔ４処理の
結果σ０．２２４．１Ｆ／−σＢ８６゜８ｋｇ／−６５
％であり几。Example: The aluminum alloy shown in the table below was high-pressure cast into a mold at a pressure of 1000 x 9/d to obtain a cod bar with a length of 100φ x 200. JIS No. 4 tensile test pieces were cut from this bar and subjected to a tensile test after heat treatment. The invented alloy cast under high pressure showed no defects such as cavities or cracks. On the other hand, if the alloy for rod 1 is cast in a mold under atmospheric pressure, the result of T4 treatment is σ0.224.1F/-σB86゜8kg/-65
% and 几.

まｔ断面を検査したところ巣や割れが生じてい友。When I inspected the cross section, I found that there were cavities and cracks.

これが延性劣下の原因をなすものと考えられる。This is thought to be the cause of the deterioration in ductility.

発明の効果 以上のようにこの発明の高圧鋳造用合金は偏析、巣など
の欠陥がなく強度、靭性にすぐれてかり、自動車部品、
電子関連部品として適している。As described above, the high-pressure casting alloy of this invention has no defects such as segregation or cavities and has excellent strength and toughness, and is suitable for automobile parts,
Suitable for electronic related parts.

Claims (2)

【特許請求の範囲】[Claims] （１）Ｓｉ０．２〜１．０％、Ｃｕ１〜５％、Ｍｎ０．
３〜１．２％、Ｍｇ０．３〜２．０％を含み、残部アル
ミニウムおよび不純物からなる強度のすぐれた高圧鋳造
用アルミニウム合金。(1) Si0.2-1.0%, Cu1-5%, Mn0.
An aluminum alloy for high-pressure casting with excellent strength, containing 3% to 1.2% Mg, 0.3% to 2.0% Mg, and the balance consisting of aluminum and impurities. （２）Ｓｉ０．２〜１．０％、Ｃｕ１〜５％、Ｍｎ０．
３〜１．２％、Ｍｇ０．３〜２．０％、Ｔｉ０．００５
〜０．２％、Ｂ０．０００２〜０．０５％を含み、残部
アルミニウムおよび不純物からなる強度のすぐれた高圧
鋳造用アルミニウム合金。(2) Si0.2-1.0%, Cu1-5%, Mn0.
3-1.2%, Mg0.3-2.0%, Ti0.005
An aluminum alloy for high-pressure casting with excellent strength, containing ~0.2%, B0.0002~0.05%, and the balance consisting of aluminum and impurities.