JP2551882B2 - Aluminum alloy for forging - Google Patents
Aluminum alloy for forgingInfo
- Publication number
- JP2551882B2 JP2551882B2 JP3189335A JP18933591A JP2551882B2 JP 2551882 B2 JP2551882 B2 JP 2551882B2 JP 3189335 A JP3189335 A JP 3189335A JP 18933591 A JP18933591 A JP 18933591A JP 2551882 B2 JP2551882 B2 JP 2551882B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- forging
- aluminum alloy
- elongation
- 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.)
- Expired - Lifetime
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車部品，家電製品
等に使用され、良好な強度及び大きな伸び率を呈する鍛
造用アルミニウム合金に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum alloy for forging, which is used for automobile parts, home electric appliances and the like and exhibits good strength and a large elongation.
【０００２】[0002]
【従来の技術】アルミニウム合金の代表的な鍛造用素材
として、６０６１合金が使用されている。しかし、６０
６１合金は、押出工程を経て鍛造用素材にされることか
ら、コスト高になる。また、押出し材を鍛造することか
ら、製品形状がおのずと単純な形状に限定される。2. Description of the Related Art As a typical forging material of aluminum alloy, 6061 alloy is used. But 60
Since the 61 alloy is made into a forging material through an extrusion process, the cost is high. Moreover, since the extruded material is forged, the product shape is naturally limited to a simple shape.
【０００３】そのため、形状が複雑な製品を得る場合、
鍛造用素材を鋳造で得る必要が生じる。現在、鋳造によ
って所定の形状が付与された素材、すなわち予形材で鍛
造が可能な材料としては、ＡＣ４Ｃ，ＡＣ４ＣＨ等がＪ
ＩＳで掲げられている。しかし、ＡＣ４Ｃ，ＡＣ４ＣＨ
等のアルミニウム合金は、６０６１合金に比較し伸び率
等の引張り特性が劣り、形状特性に優れた鍛造製品を得
ることができない。Therefore, when a product having a complicated shape is obtained,
It is necessary to obtain a forging material by casting. Currently, AC4C, AC4CH, etc. are J as a material that is given a predetermined shape by casting, that is, a material that can be forged by a preformed material.
Listed in IS. However, AC4C, AC4CH
Such aluminum alloys are inferior in tensile properties such as elongation to the 6061 alloy, and it is impossible to obtain a forged product having excellent shape properties.
【０００４】[0004]
【発明が解決しようとする課題】ＡＣ４Ｃ，ＡＣ４ＣＨ
等のアルミニウム合金を鋳造することにより得られた鍛
造用素材の伸び率を大きくするため、Ｓｉ含有量を３重
量％程度まで少なく、更にＮａ、Ｓｒ、Ｓｂ等を添加
し、共晶Ｓｉを微細化することが、特開昭５４−１３４
０７号公報で紹介されている。[Problems to be Solved by the Invention] AC4C, AC4CH
In order to increase the elongation of the forging material obtained by casting aluminum alloys, etc., the Si content should be reduced to about 3% by weight, and Na, Sr, Sb, etc. should be added to refine the eutectic Si. It is disclosed in JP-A-54-134
No. 07 publication.
【０００５】共晶Ｓｉの微細化によって、伸び率がある
程度改善される。しかし、依然として６０６１合金の伸
び率には及ばず、鍛造性に問題が残っている。また、得
られた鍛造製品の耐力が十分でないことから、所定の構
造強度をだすために厚肉化することを余儀なくされてい
た。その結果、軽量化部品としてのアルミニウム材料の
長所を活用できない現状である。The elongation of eutectic Si is improved to some extent by improving the elongation. However, the elongation rate of the 6061 alloy is still inferior, and a problem remains in forgeability. Further, since the yield strength of the obtained forged product is not sufficient, it has been unavoidable to increase the wall thickness in order to obtain a predetermined structural strength. As a result, the advantages of aluminum materials as lightweight parts cannot be utilized.
【０００６】本発明は、このような問題を解消すべく案
出されたものであり、Ｐ含有量を規制し共晶Ｓｉを十分
に微細化することにより、鍛造性を始めとして機械強度
等に優れたアルミニウム合金を提供することを目的とす
る。The present invention has been devised in order to solve such a problem. By restricting the P content and making the eutectic Si sufficiently fine, the forging property as well as the mechanical strength and the like are improved. The object is to provide an excellent aluminum alloy.
【０００７】[0007]
【課題を解決するための手段】本発明の鍛造用アルミニ
ウム合金は、その目的を達成するため、Ｓｉ：２．０〜
３．０重量％，Ｍｇ：０．２〜０．６重量％，Ｔｉ：
０．０１〜０．１重量％，Ｂ：０．０００１〜０．０１
重量％で、更にＮａ：０．００１〜０．０１重量％，Ｓ
ｒ：０．００１〜０．０５重量％，Ｓｂ：０．０５〜
０．１０重量％及びＣａ：０．０００５〜０．０１重量
％のうち何れか１種又は２種以上を含有し、Ｐ含有量を
０．００１重量％以下に規制し、残部がＡｌからなり、
鋳造組織に含まれる共晶Ｓｉの大きさが平均粒径で２０
μｍ以下であることを特徴とする。In order to achieve the object, the aluminum alloy for forging of the present invention has a Si: 2.0-
3.0% by weight, Mg: 0.2 to 0.6% by weight, Ti:
0.01-0.1% by weight, B: 0.0001-0.01
% By weight, further Na: 0.001-0.01% by weight, S
r: 0.001 to 0.05% by weight, Sb: 0.05 to
0.10% by weight and Ca: 0.0005 to 0.01% by weight, and any one or more of them is contained, the P content is regulated to 0.001% by weight or less, and the balance is made of Al. ,
The size of eutectic Si contained in the cast structure has an average grain size of 20.
It is characterized by being less than or equal to μm.
【０００８】本発明の鍛造用アルミニウム合金は、更に
Ｃｕ：０．２〜０．５重量％，Ｚｒ：０．０１〜０．２
重量％，Ｍｎ：０．０２〜０．５重量％及びＣｒ：０．
０１〜０．３重量％のうちの何れか１種又は２種以上を
含有することもできる。また、鋳造素材の気孔率を０．
４〜１．６％とし、伸び率を１５％以上とすることが好
ましい。The aluminum alloy for forging of the present invention further comprises Cu: 0.2 to 0.5% by weight and Zr: 0.01 to 0.2.
%, Mn: 0.02 to 0.5% by weight and Cr: 0.
It is also possible to contain any one kind or two kinds or more of 01 to 0.3% by weight. In addition, the porosity of the casting material is 0.
It is preferable that it is 4 to 1.6% and the elongation is 15% or more.
【０００９】[0009]
【作用】本発明の鍛造用アルミニウム合金においては、
鋳造性を確保すると共に、高靭性化及び伸びを向上させ
るため、ＡＣ４Ｃ，ＡＣ４ＣＨ等の従来のアルミニウム
合金に比較してＳｉ含有量を低めに設定している。そし
て、共晶Ｓｉの微細化を図るため、Ｎａ，Ｓｉ，Ｓｂ等
を添加すると共に、微細化阻害元素であるＰ含有量を規
制している。更に、十分な伸びを確保できる範囲内でＭ
ｇを増量することにより、耐力の向上を図っている。こ
の条件が満された予形材を鍛造すると、据込率（圧下
率）で２０％程度の僅かな朔性加工により、６０１０合
金に匹敵する靭性を得ることが可能となる。In the aluminum alloy for forging of the present invention,
In order to ensure castability and to improve toughness and elongation, the Si content is set to be lower than that of conventional aluminum alloys such as AC4C and AC4CH. Then, in order to miniaturize the eutectic Si, Na, Si, Sb, etc. are added, and the content of P, which is a grain refining inhibiting element, is regulated. Furthermore, within the range where sufficient elongation can be secured, M
The yield strength is improved by increasing g. When a preformed material satisfying these conditions is forged, it is possible to obtain a toughness comparable to that of the 6010 alloy by a slight slackening process with an upset ratio (rolling ratio) of about 20%.
【００１０】以下、合金成分及びその含有量等について
説明する。 Ｓｉ： 本発明の鍛造用アルミニウム合金は、鋳造で得
られた予形材を鍛造することにより、所定形状をもつ製
品とされる。この予形材を得るために、溶湯の流動性，
引け性等が良く、鋳造割れ等の欠陥が発生しないことが
要求される。この鋳造性を確保する上から、Ｓｉを含有
させることが必要である。しかし、多量のＳｉ含有は、
アルミニウム合金の伸びや機械的強度を低下させる。こ
の点から、本発明においては、Ｓｉ含有量を２．０〜
３．０重量％の範囲に設定した。The alloy components and their contents will be described below. Si: The aluminum alloy for forging of the present invention is made into a product having a predetermined shape by forging the preformed material obtained by casting. In order to obtain this preform, the fluidity of the molten metal,
It is required that the shrinkability is good and that defects such as casting cracks do not occur. In order to secure this castability, it is necessary to contain Si. However, if a large amount of Si is contained,
Reduces elongation and mechanical strength of aluminum alloys. From this point, in the present invention, the Si content is 2.0 to
The range was set to 3.0% by weight.
【００１１】この範囲のＳｉ含有量で、必要とする伸び
や機械的強度が得られると共に、鋳造性も良好になる。
Ｓｉ含有量が３．０重量％を超えると、ミクロ組織でも
検出されるように粒界に比較的多量の共晶Ｓｉが晶出
し、伸び，機械的強度等を劣化させる。逆に、Ｓｉ含有
量が２．０重量％未満のときには、鋳造性が悪くなる。
特に、Ｓｉ含有量１〜２重量％未満の範囲では、流動性
が最も悪く、鋳造割れ等の欠陥が発生し易い。With the Si content in this range, the required elongation and mechanical strength can be obtained, and the castability becomes good.
If the Si content exceeds 3.0% by weight, a relatively large amount of eutectic Si crystallizes at the grain boundaries as detected in the microstructure, deteriorating elongation and mechanical strength. On the contrary, when the Si content is less than 2.0% by weight, the castability becomes poor.
Particularly, when the Si content is in the range of 1 to less than 2% by weight, the fluidity is the worst and defects such as casting cracks are likely to occur.
【００１２】Ｍｇ：Ｓｉと共存して熱処理によりＭｇ2
Ｓｉとして析出し、引張強さ，耐力等の機械的強度を向
上させる。しかし、Ｍｇ含有量が０．６重量％を越える
と，伸び，衝撃値等が大きく低下する。また、６０６１
合金の性能に近づけるためには、Ｓｉ含有量の低下によ
って伸びを増大させた分、Ｍｇ含有量を可能な限り増量
して強度向上を図る。このようなＭｇの効果を発現させ
るため、０．２重量％以上のＭｇ含有が必要である。Mg: Si coexists with Mg 2 by heat treatment
Precipitates as Si and improves mechanical strength such as tensile strength and proof stress. However, when the Mg content exceeds 0.6% by weight, the elongation, impact value, etc. are greatly reduced. Also, 6061
In order to approach the performance of the alloy, the Mg content is increased as much as possible in order to increase the strength by increasing the elongation by decreasing the Si content. In order to exert such an effect of Mg, it is necessary to contain 0.2% by weight or more of Mg.
【００１３】Ｔｉ，Ｂ：アルミニウム合金の鋳造組織
は、Ｔｉ及びＢの併用添加によって微細化される。鋳造
組織の微細化に伴い、粒界に析出する不純物やシュリン
ケージ等が細かく分散され、機械的特性が向上する。こ
のような効果を得るためには、０．０１重量％以上のＴ
ｉ及び０．０００１重量％以上のＢを含有させることが
必要である。しかし、Ｔｉ含有量及びＢ含有量がそれぞ
れ０．１重量％及び０．０１重量％を超えると、析出す
る介在物が多くなり、却って靭性，強度，伸び等が劣化
する。The cast structure of Ti, B: aluminum alloy is refined by the combined addition of Ti and B. As the cast structure becomes finer, impurities and shrinkages precipitated at the grain boundaries are finely dispersed, and the mechanical properties are improved. To obtain such an effect, 0.01% by weight or more of T
It is necessary to contain i and 0.0001% by weight or more of B. However, when the Ti content and the B content exceed 0.1% by weight and 0.01% by weight, respectively, the amount of inclusions precipitated increases, and rather the toughness, strength, elongation, etc. deteriorate.
【００１４】Ｃｕ：アルミニウム合金の強度を向上させ
る上で、必要に応じて添加される元素である。０．２〜
０．５重量％のＣｕをＭｇと併用添加するとき、十分な
伸びを確保できる範囲で耐力の向上が図られる。Cu: An element that is added as needed to improve the strength of the aluminum alloy. 0.2 ~
When 0.5% by weight of Cu is added together with Mg, the yield strength can be improved within a range where sufficient elongation can be secured.
【００１５】Ｎａ，Ｓｒ，Ｓｂ，Ｃａ：共晶Ｓｉの微細
化により伸び，衝撃値等を向上させるため、Ｎａ，Ｓ
ｒ，Ｓｂ，Ｃａ等が添加される。共晶Ｓｉ微細化作用
は、０．００１重量％以上のＮａ，０．００１重量％以
上のＳｒ，０．０５重量％以上のＳｂ或いは０．０００
５重量％以上のＣａを含有させることにより得られる。
しかし、これら添加元素は、ガスの吸収及び化合物の生
成を促進させると共に、引け性を変化させる傾向を呈す
る。その結果、多量にＮａ，Ｓｒ，Ｓｂ，Ｃａ等を添加
すると、アルミニウム合金の靭性が劣化する。この点
で、Ｎａ，Ｓｒ，Ｓｂ及びＣａ含有量の上限を、それぞ
れ０．０１重量％，０．０５重量％，０．１０重量％及
び０．０１重量％に設定した。Na, Sr, Sb, Ca: In order to improve elongation, impact value, etc. by refining eutectic Si, Na, S
r, Sb, Ca, etc. are added. The eutectic Si refinement action is 0.001 wt% or more of Na, 0.001 wt% or more of Sr, 0.05 wt% or more of Sb, or 0.000.
It is obtained by containing 5 wt% or more of Ca.
However, these additive elements have a tendency to promote absorption of gas and formation of compounds, and to change shrinkage. As a result, if a large amount of Na, Sr, Sb, Ca, etc. is added, the toughness of the aluminum alloy deteriorates. At this point, the upper limits of the Na, Sr, Sb and Ca contents were set to 0.01% by weight, 0.05% by weight, 0.10% by weight and 0.01% by weight, respectively.
【００１６】Ｐ：Ｎａ，Ｓｒ，Ｓｂ，Ｃａ等の添加元素
は、合金中のＰと反応し、共晶Ｓｉの微細化に有効に作
用しなくなる。そのため、本発明においては、微細化効
果を阻害するＰを０．００１重量％以下に規制して、Ｎ
ａ，Ｓｒ，Ｓｂ，Ｃａ等の作用を効率よく発揮させる。Additive elements such as P: Na, Sr, Sb, and Ca react with P in the alloy and do not act effectively on the refinement of eutectic Si. Therefore, in the present invention, P that inhibits the miniaturization effect is regulated to 0.001% by weight or less, and N
The action of a, Sr, Sb, Ca, etc. is efficiently exhibited.
【００１７】Ｚｒ，Ｍｎ，Ｃｒ：加工時にアルミニウム
合金が再結晶することを防止するために、必要に応じて
添加される元素である。再結晶防止を図るためには、
０．０１重量％以上のＺｒ，０．０２重量％以上のＭｎ
或いは０．０１重量％以上のＣｒを含有させることが必
要である。しかし、これら元素を多量に添加すると、マ
トリックスの硬度が上昇し、却って加工性が低下する。
そこで、Ｚｒ含有量，Ｍｎ含有量及びＣｒ含有量の上限
を、それぞれ０．２重量％，０．５重量％及び０．３重
量％に規定した。Zr, Mn, Cr: Elements added as necessary to prevent recrystallization of the aluminum alloy during processing. To prevent recrystallization,
0.01 wt% or more Zr, 0.02 wt% or more Mn
Alternatively, it is necessary to contain 0.01% by weight or more of Cr. However, when these elements are added in a large amount, the hardness of the matrix increases and the workability deteriorates.
Therefore, the upper limits of the Zr content, the Mn content, and the Cr content are defined as 0.2% by weight, 0.5% by weight, and 0.3% by weight, respectively.
【００１８】共晶Ｓｉの粒径：本発明のアルミニウム合
金においては、共晶Ｓｉの大きさが平均粒径で２０μｍ
以下の小さなものである。この小さな共晶Ｓｉは、予形
材に含まれる気孔を微細なものにすると共に、僅かな据
込み率の鍛造によって気孔率を急激に低減させ、中実度
の高い鍛造製品を得る要因となる。これに対して、従来
のアルミニウム合金を鍛造して実質的に気孔のない鍛造
製品を得ようとすると、据込み率を５０％以上に設定す
ることが必要である。Grain size of eutectic Si: In the aluminum alloy of the present invention, the size of eutectic Si is 20 μm in average grain size.
Below is a small one. This small eutectic Si is a factor that makes the pores contained in the preform finer and sharply reduces the porosity by forging with a small upsetting ratio, thereby obtaining a forged product with high solidity. . On the other hand, when a conventional aluminum alloy is forged to obtain a forged product having substantially no pores, it is necessary to set the upsetting rate to 50% or more.
【００１９】[0019]
【実施例】以下、実施例によって本発明を具体的に説明
する。表１に示した合金成分の素材をＪＩＳＤ４号の舟
形鋳型を使用して鋳造した。鋳造材にＴ6の熱処理を施
した後、引張り試験を行った。試験結果を表２に示す。EXAMPLES The present invention will be specifically described below with reference to examples. The alloy components shown in Table 1 were cast using a JIS D4 boat-shaped mold. After subjecting the cast material to the heat treatment of T 6 , a tensile test was conducted. The test results are shown in Table 2.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【表２】 [Table 2]
【００２２】表２から明らかなように、試験Ｎo.１〜６
の本発明合金では、伸び率が１５％以上であり、鍛造性
に優れていることが判る。また、引張り強さ，耐力等の
機械的強度も、従来の鍛造用アルミニウム合金と遜色の
ない値を示している。これに対し、伸び率に重点をおい
て合金設計した試験Ｎo.７及び１０の合金では機械的強
度が劣っており、機械的強度に重点をおいて合金設計し
た試験Ｎo.９の合金では伸び率が悪く鍛造性に劣ったも
のとなる。この対比から、試験Ｎo.１〜６の本発明合金
は、鍛造性及び機械的強度の双方にバランスがとれた材
料であるといえる。As is clear from Table 2, Test Nos. 1 to 6
It can be seen that the alloy of the present invention has an elongation of 15% or more and is excellent in forgeability. Further, the mechanical strength such as tensile strength and proof stress shows values comparable to those of conventional aluminum alloys for forging. On the other hand, the alloys of Test Nos. 7 and 10 in which the alloy was designed with emphasis on the elongation were inferior in mechanical strength, and the alloys of Test No. 9 with the alloy designed with emphasis on mechanical strength were elongated. The rate is poor and the forgeability is poor. From this comparison, it can be said that the alloys of the present invention in Test Nos. 1 to 6 are materials having well-balanced forgeability and mechanical strength.
【００２３】実施例２：鋳造で得られた合金材料は、凝
固速度の違いにより製品中の気孔率が異なる。製品中に
気孔が多いと、強度が低下し、荷重が加わった場合に気
孔を起点として破断等が発生する。この点、本発明合金
においては、共晶Ｓｉが微細な晶出物として分散されて
いるため、鍛造時の据込みにより気孔を潰し、伸び率が
大きな中実の製品にすることが可能である。Example 2: The alloy material obtained by casting has different porosity in the product due to the difference in solidification rate. If there are many pores in the product, the strength will decrease, and when a load is applied, breakage will occur starting from the pores. In this regard, in the alloy of the present invention, since eutectic Si is dispersed as fine crystallized substances, it is possible to crush the pores by upsetting during forging and to obtain a solid product having a large elongation. .
【００２４】たとえば、試験Ｎo.１の合金に対し据込み
率を変えた鍛造を行い、鍛造後の気孔率と据込み率との
関係を調査した。また、鍛造による中実化と肉厚との関
係を調べるため、厚肉部及び薄肉部に対する据込み率を
変化させた。その結果、据込み率と気孔率との間に、図
１に示す関係が得られた。For example, the alloy of Test No. 1 was subjected to forging with a different upsetting ratio, and the relationship between the porosity after forging and the upsetting ratio was investigated. In addition, in order to investigate the relationship between solidification by forging and wall thickness, the upsetting ratio for the thick and thin parts was changed. As a result, the relationship shown in FIG. 1 was obtained between the upsetting rate and the porosity.
【００２５】なお、図１における据込み率は、［（鍛造
前の肉厚−鍛造後の肉厚）／鍛造前の肉厚］×１００の
圧下率で表した。また、気孔率は、鍛造後の合金につい
て［（真比重−比重）／真比重］×１００で表した。図
中、○印は鋳造肉厚２０ｍｍの部分における気孔率の変
化を示し、■印は鋳造肉厚２６ｍｍの部分における気孔
率の変化を示し、△印は鋳造肉厚３２ｍｍの部分におけ
る気孔率の変化を示す。The upsetting ratio in FIG. 1 is represented by a reduction ratio of [(thickness before forging-thickness after forging) / thickness before forging] × 100. Further, the porosity was expressed by [(true specific gravity-specific gravity) / true specific gravity] × 100 for the alloy after forging. In the figure, ○ indicates the change in porosity in the portion with a cast wall thickness of 20 mm, ■ indicates the change in porosity in the portion with a cast wall thickness of 26 mm, and Δ indicates the porosity in the portion with a cast wall thickness of 32 mm. Show changes.
【００２６】図１から明らかなように、何れの肉厚をも
つものにおいても、１０〜２０％程度の僅かな据込み率
で、実質的に全ての気孔が潰され、中実度の高い製品と
なることが判る。As is apparent from FIG. 1, in any thickness, a product having a high solidity is obtained by substantially upsetting all the pores with a small upsetting rate of about 10 to 20%. It turns out that
【００２７】実施例３：表１に示した組成をもつアルミ
ニウム合金を鋳造して得られた予形材を４００℃で１時
間加熱する予熱を施した後、鍛造し、次いでＴ6 処理を
行った。得られた鍛造材から試験片を切り出し、引張り
試験に供した。表３は、その試験結果を表したものであ
る。表３から明らかなように、試験Ｎo.１〜６の本発明
合金は、１０〜２０％の僅かな据込率により従来合金よ
りも伸びが大きく優れた特性を示している。Example 3: A preform obtained by casting an aluminum alloy having the composition shown in Table 1 was heated at 400 ° C. for 1 hour, preheated, then forged, and then subjected to T 6 treatment. It was A test piece was cut out from the obtained forged material and subjected to a tensile test. Table 3 shows the test results. As is clear from Table 3, the alloys of the present invention of Test Nos. 1 to 6 have excellent elongation and superior properties to the conventional alloys due to the small upsetting ratio of 10 to 20%.
【００２８】[0028]
【表３】 [Table 3]
【００２９】[0029]
【発明の効果】以上に説明したように、本発明の鍛造用
アルミニウム合金は、鋳造材として使用可能なまでＳｉ
量を低減して伸びを改善し、結晶粒や晶出物の微細化に
よって機械的強度を確保している。そして、鋳造材に含
まれている気孔が微細であるため、鍛造によって気孔が
容易に押し潰され、僅かな据込み率で中実度が高く展延
性の良好な製品が得られる。As described above, the aluminum alloy for forging according to the present invention is made of Si until it can be used as a casting material.
The amount is reduced to improve the elongation, and the mechanical strength is secured by refining crystal grains and crystallized substances. Further, since the pores contained in the cast material are fine, the pores are easily crushed by forging, and a product having high solidity and good spreadability can be obtained with a small upsetting rate.
【図１】 本発明鍛造用アルミニウム合金の据込み率と
気孔率との関係を示したグラフFIG. 1 is a graph showing the relationship between upsetting rate and porosity of the aluminum alloy for forging according to the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 北岡 山治 東京都港区三田３丁目13番12号 株式会 社日軽技研内 (72)発明者 三部 隆宏 神奈川県横浜市神奈川区宝町２番地 日 産自動車株式会社内 (72)発明者 北村 行由 神奈川県横浜市神奈川区宝町２番地 日 産自動車株式会社内 (72)発明者 藤川 真一郎 神奈川県横浜市神奈川区宝町２番地 日 産自動車株式会社内 (72)発明者 桜木 秀偉 神奈川県横浜市神奈川区宝町２番地 日 産自動車株式会社内 (56)参考文献 特開 昭54−13407（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yamaji Kitaoka 3-13-12 Mita, Minato-ku, Tokyo Incorporated Nikkei Giken (72) Inventor Takahiro Sanbe 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Yukio Kitamura 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Shinichiro Fujikawa 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Hideki Sakuragi 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (56) Reference JP-A-54-13407 (JP, A)
Claims (3)
０．２〜０．６重量％，Ｔｉ：０．０１〜０．１重量
％，Ｂ：０．０００１〜０．０１重量％で、更にＮａ：
０．００１〜０．０１重量％，Ｓｒ：０．００１〜０．
０５重量％，Ｓｂ：０．０５〜０．１０重量％及びＣ
ａ：０．０００５〜０．０１重量％のうちの何れか１種
又は２種以上を含有し、Ｐ含有量を０．００１重量％以
下に規制し、残部がＡｌからなり、鋳造組織に含まれる
共晶Ｓｉの大きさが平均粒径で２０μｍ以下であること
を特徴とする鍛造用アルミニウム合金。1. Si: 2.0 to 3.0% by weight, Mg:
0.2 to 0.6% by weight, Ti: 0.01 to 0.1% by weight, B: 0.0001 to 0.01% by weight, and further Na:
0.001 to 0.01% by weight, Sr: 0.001 to 0.
05% by weight, Sb: 0.05-0.10% by weight and C
a: contains any one kind or two or more kinds among 0.0005 to 0.01% by weight, regulates the P content to 0.001% by weight or less, and the balance is made of Al and is included in the casting structure. An aluminum alloy for forging, wherein the size of the eutectic Si to be formed is 20 μm or less in average grain size.
０．２〜０．６重量％，Ｔｉ：０．０１〜０．１重量
％，Ｂ：０．０００１〜０．０１重量％で、更にＮａ：
０．００１〜０．０１重量％，Ｓｒ：０．００１〜０．
０５重量％，Ｓｂ：０．０５〜０．１０重量％及びＣ
ａ：０．０００５〜０．０１重量％のうちの何れか１種
又は２種以上，Ｃｕ：０．２〜０．５重量％，Ｚｒ：
０．０１〜０．２重量％，Ｍｎ：０．０２〜０．５重量
％及びＣｒ：０．０１〜０．３重量％のうちの何れか１
種又は２種以上を含有し、Ｐ含有量を０．００１重量％
以下に規制し、残部がＡｌからなり、鋳造組織に含まれ
る共晶Ｓｉの大きさが平均粒径で２０μｍ以下であるこ
とを特徴とする鍛造用アルミニウム合金。2. Si: 2.0 to 3.0% by weight, Mg:
0.2 to 0.6% by weight, Ti: 0.01 to 0.1% by weight, B: 0.0001 to 0.01% by weight, and further Na:
0.001 to 0.01% by weight, Sr: 0.001 to 0.
05% by weight, Sb: 0.05-0.10% by weight and C
a: Any one or more of 0.0005 to 0.01% by weight, Cu: 0.2 to 0.5% by weight, Zr:
Any one of 0.01 to 0.2 wt%, Mn: 0.02 to 0.5 wt% and Cr: 0.01 to 0.3 wt%
Containing 1 or 2 or more species and having a P content of 0.001% by weight
An aluminum alloy for forging, which is regulated as follows, wherein the balance is made of Al, and the size of eutectic Si contained in the cast structure is 20 μm or less in average grain size.
で、伸びが１５％以上であることを特徴とする請求項１
又は２記載の鍛造用アルミニウム合金。3. The porosity of the casting material is 0.4 to 1.6%.
And the elongation is 15% or more.
Or the aluminum alloy for forging according to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3189335A JP2551882B2 (en) | 1991-07-03 | 1991-07-03 | Aluminum alloy for forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3189335A JP2551882B2 (en) | 1991-07-03 | 1991-07-03 | Aluminum alloy for forging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH059637A JPH059637A (en) | 1993-01-19 |
| JP2551882B2 true JP2551882B2 (en) | 1996-11-06 |
Family
ID=16239621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3189335A Expired - Lifetime JP2551882B2 (en) | 1991-07-03 | 1991-07-03 | Aluminum alloy for forging |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2551882B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01232136A (en) * | 1988-03-12 | 1989-09-18 | Hitachi Ltd | Engine control device |
| JPH07109536A (en) * | 1993-10-12 | 1995-04-25 | Nippon Light Metal Co Ltd | Aluminum alloy for forging and heat treatment therefor |
| JP2001123239A (en) * | 1999-10-21 | 2001-05-08 | Daiki Aluminium Industry Co Ltd | High strength aluminum alloy for casting and aluminum alloy casting |
| JP4719731B2 (en) * | 2007-11-22 | 2011-07-06 | 住友電気工業株式会社 | Aluminum alloy rolled material with excellent machinability and method for producing the same |
-
1991
- 1991-07-03 JP JP3189335A patent/JP2551882B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH059637A (en) | 1993-01-19 |
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