JPH0578770A - Cast aluminum alloy having excellent wear resistance - Google Patents

Cast aluminum alloy having excellent wear resistance

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Publication number
JPH0578770A
JPH0578770A JP3270209A JP27020991A JPH0578770A JP H0578770 A JPH0578770 A JP H0578770A JP 3270209 A JP3270209 A JP 3270209A JP 27020991 A JP27020991 A JP 27020991A JP H0578770 A JPH0578770 A JP H0578770A
Authority
JP
Japan
Prior art keywords
weight
content
wear resistance
alloy
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
Application number
JP3270209A
Other languages
Japanese (ja)
Other versions
JP2709663B2 (en
Inventor
Akio Hashimoto
Yoji Kanbe
Yamaji Kitaoka
Mamoru Sayashi
Kouji Watanabe
Yasuhiko Watanabe
山治 北岡
昭男 橋本
浩児 渡辺
靖彦 渡辺
洋史 神戸
守 鞘師
Original Assignee
Nikkei Techno Res Co Ltd
Nippon Light Metal Co Ltd
Nissan Motor Co Ltd
日本軽金属株式会社
日産自動車株式会社
株式会社日軽技研
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Filing date
Publication date
Application filed by Nikkei Techno Res Co Ltd, Nippon Light Metal Co Ltd, Nissan Motor Co Ltd, 日本軽金属株式会社, 日産自動車株式会社, 株式会社日軽技研 filed Critical Nikkei Techno Res Co Ltd
Priority to JP3270209A priority Critical patent/JP2709663B2/en
Publication of JPH0578770A publication Critical patent/JPH0578770A/en
Application granted granted Critical
Publication of JP2709663B2 publication Critical patent/JP2709663B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To obtain a cast Al alloy having excellent meltability, castability and machinability without deteriorating wear resistance by reducing the content of Si and regulating the contents of Cu, Mg, Mn, Cr, Ti, P, Fe, B, etc. CONSTITUTION:This cast Al alloy contains, by weight, 14.0-16.0% Si, 2.0-5.0% Cu, 0.1-1.0% Mg, 0.3-0.8% Mn, 0.1-0.3% Cr, 0.05-0.20% Ti, 0.003-0.05% P, <=1.5% Fe and <0.005% Ca or further contains 0.00010.01% B and/or 0.3-3.0% Ni. The average grain size of proeutectic Si in this alloy has been regulated to 10-50mum. This alloy is used for a cylinder block, a piston, compressor parts, change gear parts, etc.

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【産業上の利用分野】本発明は、シリンダブロック等と
して使用される耐摩耗性に優れたアルミニウム鋳造合金
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum casting alloy having excellent wear resistance which is used as a cylinder block or the like.
【0002】[0002]
【従来の技術】車両用シリンダブロックとして、軽量化
を図ってA390で代表される鋳造用アルミニウム合金
が従来から使用されている。このアルミニウム合金は、
耐摩耗性に優れていることを活用して、実用エンジン,
耐摩耗部品等として広く使用されている。
2. Description of the Related Art As a cylinder block for a vehicle, an aluminum alloy for casting represented by A390 has been conventionally used for the purpose of weight reduction. This aluminum alloy is
Taking advantage of its excellent wear resistance, a practical engine,
Widely used as wear resistant parts.
【0003】A390系のアルミニウム合金は、Si:
16.0〜18.0重量%,Cu:4.0〜5.0重量
%,Mg:0.45〜0.65重量%,Fe:0.5重
量%未満,Mn:0.1重量%未満,Ti:0.20重
量%未満の組成をもち、必要とする耐摩耗性を確保する
ため多量のSiが添加されている。しかし、Si含有量
の増加に伴って、アルミニウム合金の液相線温度が高く
なる。
The A390 series aluminum alloy is Si:
16.0 to 18.0 wt%, Cu: 4.0 to 5.0 wt%, Mg: 0.45 to 0.65 wt%, Fe: less than 0.5 wt%, Mn: 0.1 wt% , Ti: less than 0.20% by weight, and a large amount of Si is added to ensure the required wear resistance. However, as the Si content increases, the liquidus temperature of the aluminum alloy increases.
【0004】その結果、通常の合金よりもかなり高い温
度で溶解,鋳造することが必要となり、ライニング耐火
物として高価なものが要求されることは勿論、炉の寿命
低下,燃料消費量の増加,ダイキャスト金型等の寿命低
下が問題となる。また、初晶Siの分布が不均質にな
り、ヒケ巣等の鋳造欠陥が発生し易い。
As a result, it is necessary to melt and cast at a temperature considerably higher than that of a normal alloy, which requires expensive refractory linings, of course, shortens the life of the furnace, increases fuel consumption, There is a problem of shortening the life of die casting molds. In addition, the distribution of primary crystal Si becomes non-uniform, and casting defects such as sink marks are likely to occur.
【0005】このA390系アルミニウム合金の欠点を
解消するため、特開昭50−64107号公報では、S
i含有量を13.5〜16.0重量%と低めに設定して
鋳造性を確保すると共に、Cu,Mg,Zn等の添加に
よって高度及び耐摩耗性を向上させることが紹介されて
いる。
In order to solve the drawbacks of the A390 type aluminum alloy, Japanese Patent Laid-Open No. 506464107 discloses S.
It has been introduced that the i content is set to a low value of 13.5-16.0% by weight to secure the castability, and the addition of Cu, Mg, Zn and the like improves the altitude and the wear resistance.
【0006】[0006]
【発明が解決しようとする課題】しかし、A390系ア
ルミニウム合金の他の欠点である初晶Siの不均一分布
は、前掲公報の合金設計によっても未解決のままであ
る。そのため、依然として鋳造欠陥等が生じ易い材料と
して扱われている。また、不均一に分布した初晶Si
は、特に急冷効果を受ける部分と徐冷される部分との間
でアルミニウム合金鋳物の性質に変動をきたし、材質に
対する信頼性を欠く原因となる。
However, the non-uniform distribution of primary crystal Si, which is another drawback of the A390 series aluminum alloy, remains unsolved by the alloy design described in the above publication. Therefore, it is still treated as a material that is prone to casting defects and the like. In addition, non-uniformly distributed primary crystal Si
In particular, the properties of the aluminum alloy casting fluctuate between the part that is subjected to the rapid cooling effect and the part that is gradually cooled, and this causes the lack of reliability of the material.
【0007】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、Si含有量を14.0〜16.0
重量%に設定した合金系においてCu,Mg,Mn,C
r,Ti,P,Fe等の配合割合を特定することによっ
て、微細な初晶Siの均一分散を図り、耐摩耗性に優れ
鋳造欠陥のないアルミニウム鋳造合金を提供することを
目的とする。
The present invention has been devised to solve such a problem, and has a Si content of 14.0 to 16.0.
Cu, Mg, Mn, C in the alloy system set to wt%
By specifying the blending ratio of r, Ti, P, Fe, etc., it is an object of the present invention to achieve a uniform dispersion of fine primary crystal Si and to provide an aluminum casting alloy having excellent wear resistance and no casting defects.
【0008】[0008]
【課題を解決するための手段】本発明のアルミニウム鋳
造合金は、その目的を達成するため、Si:14.0〜
16.0重量%,Cu:2.0〜5.0重量%,Mg:
0.1〜1.0重量%,Mn:0.3〜0.8重量%,
Cr:0.1〜0.3重量%,Ti:0.05〜0.2
0重量%,P:0.003〜0.05重量%,Fe:
1.5重量%以下を含有し、Ca含有量が0.005重
量%未満に規制され、且つ平均粒径10〜50μmの初
晶Siが均一に分散した組織をもっていることを特徴と
する。
The aluminum casting alloy of the present invention has a Si: 14.0 to
16.0% by weight, Cu: 2.0 to 5.0% by weight, Mg:
0.1-1.0% by weight, Mn: 0.3-0.8% by weight,
Cr: 0.1 to 0.3% by weight, Ti: 0.05 to 0.2
0% by weight, P: 0.003 to 0.05% by weight, Fe:
It is characterized in that it contains 1.5 wt% or less, the Ca content is regulated to less than 0.005 wt%, and the primary crystal Si having an average grain size of 10 to 50 μm is uniformly dispersed.
【0009】また、このアルミニウム鋳造合金は、更に
B:0.0001〜0.01重量%及びNi:0.3〜
3.0重量%の1種又は2種を含有することができる。
The cast aluminum alloy further contains B: 0.0001 to 0.01% by weight and Ni: 0.3 to.
It may contain 3.0% by weight of one or two.
【0010】[0010]
【作 用】本発明者等は、耐摩耗性,機械的性質,物理
的性質,切削性,鋳造性等にSi,Cu,Mg,Mn,
Cr等の合金元素が与える影響について詳細に検討し
た。その結果、A390合金の下限である16重量%以
下にSi含有量を下げても、初晶Siが微細で且つ均一
に分散している限り、耐摩耗性の確保が図られることを
見出した。
[Operation] The inventors of the present invention have found that the wear resistance, mechanical properties, physical properties, machinability, castability, etc. of Si, Cu, Mg, Mn,
The effects of alloying elements such as Cr were examined in detail. As a result, they have found that even if the Si content is reduced to 16% by weight or less, which is the lower limit of the A390 alloy, wear resistance can be ensured as long as the primary crystal Si is finely and uniformly dispersed.
【0011】すなわち、本発明のアルミニウム鋳造合金
においては、A390系合金に比較してSi含有量を1
6.0重量%以下と低めに設定しているので、溶解性及
び鋳造性が大幅に改善され、操業が容易になる。そし
て、シリンダーブロック等の耐摩耗部品に要求される切
削性,溶解性,鋳造性等に関するA390系合金の問題
点を、Siを始めとする合金元素の含有量の調整,マト
リックスの強化等によって、耐摩耗性の低下を伴うこと
なく解消したものである。
That is, in the aluminum casting alloy of the present invention, the Si content is 1 as compared with the A390 series alloy.
Since it is set as low as 6.0% by weight or less, the solubility and the castability are significantly improved and the operation becomes easy. Then, the problems of the A390 series alloy regarding the machinability, solubility, castability, etc. required for wear resistant parts such as cylinder blocks can be solved by adjusting the content of alloying elements such as Si and strengthening the matrix. This is solved without deterioration of wear resistance.
【0012】初晶Siの微細化及び均一分散には、特に
Crの添加が有効である。Crは、初晶Si中に混在す
る元素である。Crの混在によって初晶Siの比重が大
きくなり、鋳造中におけるSiの浮上が抑制されるもの
と推察される。併せて、微細なAl−Cr系化合物が晶
出し、これによっても耐摩耗性が向上する。また、初晶
Siの微細化には、所定量のP含有も効果がある。
The addition of Cr is particularly effective for the refinement and uniform dispersion of the primary crystal Si. Cr is an element mixed in primary crystal Si. It is presumed that the presence of Cr increases the specific gravity of primary crystal Si and suppresses the floating of Si during casting. At the same time, a fine Al-Cr compound is crystallized, which also improves the wear resistance. In addition, the inclusion of a predetermined amount of P is also effective for refining the primary crystal Si.
【0013】以下、各合金元素の含有量及び作用等につ
いて説明する。Si:耐摩耗性及び弾性係数を向上させ
る上で、重要な元素である。しかし、Si含有量が1
6.0重量%を超えると、合金の液相線温度が上昇して
溶解性,鋳造性等が悪くなると共に、初晶Siの分散が
不均一になり易い。他方、14.0重量%未満のSi含
有量では、耐摩耗性が不足する。そこで、本発明におい
ては、Si含有量を14.0〜16.0重量%の範囲に
規定した。
The contents and actions of each alloying element will be described below. Si: An important element for improving wear resistance and elastic modulus. However, the Si content is 1
If it exceeds 6.0% by weight, the liquidus temperature of the alloy increases, the solubility, castability, etc. deteriorate, and the dispersion of primary crystal Si tends to become non-uniform. On the other hand, if the Si content is less than 14.0% by weight, abrasion resistance is insufficient. Therefore, in the present invention, the Si content is defined in the range of 14.0 to 16.0% by weight.
【0014】また、Si含有量が16.0重量%以下に
なると、アルミニウム合金の切削性が急激に向上する。
その結果、摩耗に起因した工具寿命の低下がなくなり切
削コストの大幅な低減が可能となる。
When the Si content is 16.0% by weight or less, the machinability of the aluminum alloy is drastically improved.
As a result, the tool life will not be reduced due to wear, and the cutting cost can be significantly reduced.
【0015】Cu:マトリックスを強化する作用を呈
し、これによって耐摩耗性が向上する。このような作用
を得るためには、2.0重量%以上のCuを含有させる
ことが必要である。しかし、Cu含有量が5.0重量%
を超えると、ヒケ巣の発生が多くなる。
Cu: Exhibits the effect of strengthening the matrix, which improves the wear resistance. In order to obtain such an effect, it is necessary to contain 2.0% by weight or more of Cu. However, the Cu content is 5.0% by weight
Beyond that, the number of shrinkage nests increases.
【0016】Mg:硬度,耐摩耗性,機械的強度等を上
昇させる上で有効な合金元素であり、0.1重量%以上
のMg含有でこれらの作用が得られる。しかし、1.0
重量%を超えてMgを含有させると、靭性を低下させる
傾向が見られる。
Mg: An alloying element effective in increasing hardness, wear resistance, mechanical strength and the like, and these effects are obtained when Mg is contained in an amount of 0.1% by weight or more. But 1.0
If Mg is contained in excess of wt%, the toughness tends to be reduced.
【0017】Mn:マトリックスを強化し、機械的性質
を改善する合金元素である。Mn含有量が0.3重量%
未満になると、耐摩耗性が低下する傾向が見られる。他
方、0.8重量%を超えるMn含有量では、鋳造性が悪
くなり,逆に機械的性質の劣化を招く。
Mn: An alloying element that strengthens the matrix and improves mechanical properties. Mn content is 0.3% by weight
If it is less than 1, the wear resistance tends to decrease. On the other hand, if the Mn content exceeds 0.8% by weight, the castability is deteriorated and conversely the mechanical properties are deteriorated.
【0018】Cr:初晶Siを微細且つ均一に分散させ
る上で重要な合金元素であり、硬度,機械的性質の向上
にも有効に作用する。このような作用は、0.1重量%
以上のCr含有量で顕著となる。しかし、Cr含有量が
0.3重量%を超えると、鋳造性及び機械的性質が低下
する。また、多量のCr含有は、Al−Cr系晶出物を
粗大化させる原因ともなる。
Cr: An alloying element important for finely and uniformly dispersing primary crystal Si, and effectively acts to improve hardness and mechanical properties. This effect is 0.1% by weight
It becomes remarkable with the above Cr contents. However, if the Cr content exceeds 0.3% by weight, castability and mechanical properties deteriorate. In addition, a large amount of Cr content also causes coarsening of Al—Cr-based crystallized substances.
【0019】Ti:機械的性質を向上させる作用を呈
し、組織を均一化させることにも有効である。これらの
作用を得るためには、0.05重量%以上のTiを含有
させることが必要である。しかし、0.20重量%を超
えるTi含有量では、逆に機械的性質の低下を招く。
Ti: It has an effect of improving mechanical properties and is also effective in homogenizing the structure. In order to obtain these effects, it is necessary to contain 0.05% by weight or more of Ti. However, if the Ti content exceeds 0.20% by weight, the mechanical properties are deteriorated.
【0020】P:Crと共に初晶Siを微細化し均一に
分散させる作用を呈する。この初晶Siに与える作用
は、0.003重量%以上のP含有量で確保される。し
かし、P含有量が0.05重量%を超えると、湯流れ等
の鋳造性が劣化する。そこで、本発明においては、0.
003〜0.05重量%の範囲にP含有量を設定した。
また、P含有量をこの範囲に維持するとき、溶湯の粘性
低下によって湯流れ性がよくなり、鋳造性の向上が図ら
れる。
P: With Cr, it has the function of refining and uniformly dispersing the primary crystal Si. The action given to the primary crystal Si is secured by the P content of 0.003% by weight or more. However, if the P content exceeds 0.05% by weight, castability such as molten metal flow deteriorates. Therefore, in the present invention, 0.
The P content was set in the range of 003 to 0.05% by weight.
Further, when the P content is maintained in this range, the melt flowability is improved due to the decrease in the viscosity of the molten metal, and the castability is improved.
【0021】Fe:溶製過程でアルミニウム合金に取り
込まれる不純物である。多量のFeが混入すると、特に
徐冷部,ホットスポット部等にAl−Fe系化合物,A
l−Fe−Mn−Si系化合物等が生成し、ミクロポロ
シティの発生原因となる。その結果、得られたアルミニ
ウム合金の靭性及び強度を低下させる。この欠点を防止
するため、本発明においては、Fe含有量を1.5重量
%以下に規定した。
Fe: Impurity taken into the aluminum alloy during the melting process. If a large amount of Fe is mixed in, especially in the slow cooling part, the hot spot part, etc., the Al-Fe compound, A
An l-Fe-Mn-Si-based compound or the like is generated, which causes generation of microporosity. As a result, the toughness and strength of the obtained aluminum alloy are reduced. In order to prevent this drawback, in the present invention, the Fe content is specified to be 1.5% by weight or less.
【0022】ただし、アルミニウム合金をダイキャスト
鋳造に使用するとき、高温の合金が金型内面に焼き付く
ことを防止する上で、Feは有効な合金元素である。そ
こで、ダイキャスト鋳物として使用する場合には、0.
1重量%以上のFe含有量を確保することが好ましい。
However, when an aluminum alloy is used for die cast casting, Fe is an effective alloying element for preventing the high temperature alloy from sticking to the inner surface of the mold. Therefore, when it is used as a die-cast casting,
It is preferable to secure an Fe content of 1% by weight or more.
【0023】Ca:Feと同様に、溶製過程でアルミニ
ウム合金に原料Siから混入する不純物である。Ca含
有量が0.005重量%を超えて多くなると、鋳造時に
内部ヒケが大きくなり、鋳造性の低下を招く。また、P
による初晶Si微細化作用を阻害する。そこで、本発明
においては、Ca含有量を0.005重量%以下に規定
した。
Similar to Ca: Fe, it is an impurity mixed into the aluminum alloy from the raw material Si during the melting process. When the Ca content exceeds 0.005% by weight and increases, the internal sink mark becomes large during casting, resulting in deterioration of castability. Also, P
Inhibits the primary crystal Si refining effect. Therefore, in the present invention, the Ca content is specified to be 0.005% by weight or less.
【0024】B:任意成分として添加されるBは、Ti
と共に結晶粒を微細化させることに寄与する。この作用
は、B含有量0.0001重量%でみられる。しかし、
多量のB含有は、アルミニウム合金の脆化を招くので、
上限を0.01重量%に設定した。
B: B added as an optional component is Ti
At the same time, it contributes to the refinement of crystal grains. This effect is seen at a B content of 0.0001% by weight. But,
Since a large amount of B content causes embrittlement of the aluminum alloy,
The upper limit was set to 0.01% by weight.
【0025】Ni:任意成分として添加されるNiは、
高温強度を向上し、硬度,耐摩耗性を改善する上で有効
な合金元素である。これらの作用は、Ni含有量0.3
重量%以上でみられる。しかし、高価なNiを多量に含
有させることは、アルミニウム合金のコストを上昇させ
るので好ましくない。また、Ni含有量の増加に伴い、
耐食性の低下もみられる。そこで、本発明においては、
Ni含有量の上限を3.0重量%に規定し、Niの作用
をMnで置換或いは補完する。
Ni: Ni added as an optional component is
It is an effective alloying element for improving high temperature strength, hardness and wear resistance. These actions have a Ni content of 0.3.
It is seen in the weight% and above. However, the inclusion of a large amount of expensive Ni is not preferable because it increases the cost of the aluminum alloy. In addition, as the Ni content increases,
Corrosion resistance is also reduced. Therefore, in the present invention,
The upper limit of the Ni content is specified to be 3.0% by weight, and the action of Ni is replaced or complemented by Mn.
【0026】初晶Siの粒径:耐摩耗性,切削性及び鋳
造性を確保するため、初晶Siの平均粒径を10〜50
μmの範囲に調整することが必要である。初晶Siの平
均粒径が10μm未満の場合に、耐摩耗性を向上させる
初晶Siの効果が小さくなる。逆に、初晶Siの平均粒
径が50μmを超えると、大きな初晶Siが存在するこ
とから、カジリ現象や機械的性質,切削性等の低下がみ
られる。
Grain size of primary crystal Si: In order to secure wear resistance, machinability and castability, the average grain size of primary crystal Si is 10 to 50.
It is necessary to adjust to the μm range. When the average grain size of the primary crystal Si is less than 10 μm, the effect of the primary crystal Si for improving the wear resistance becomes small. On the contrary, when the average grain size of the primary crystal Si exceeds 50 μm, a large primary crystal Si is present, so that the galling phenomenon, mechanical properties, machinability and the like are deteriorated.
【0027】このように合金設計された本発明のアルミ
ニウム鋳造合金は、金型重力鋳造,低圧鋳造,砂型鋳
造,ダイキャスト,溶湯鍛造等で目標とする鋳物に製造
することができる。また、T5,T6 等の熱処理を施すこ
とも可能である。
The aluminum casting alloy of the present invention, which is alloy-designed as described above, can be manufactured into a target casting by die gravity casting, low pressure casting, sand casting, die casting, molten metal forging and the like. It is also possible to perform heat treatment such as T 5 and T 6 .
【0028】[0028]
【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に示した成分・組成のアルミニウム合金を
溶製し、温度350℃に保持した舟金型を使用して鋳造
した。得られた鋳物を旋盤で切削し、その切削性を調査
した。また、耐摩耗性,溶解性,鋳造性,機械的性質等
を調べ、これらを表2にまとめて示した。
EXAMPLES The present invention will be specifically described below with reference to examples. Aluminum alloys having the components and compositions shown in Table 1 were melted and cast using a boat mold held at a temperature of 350 ° C. The obtained casting was cut with a lathe, and its machinability was investigated. Further, wear resistance, solubility, castability, mechanical properties, etc. were examined, and shown in Table 2.
【0029】[0029]
【表1】 [Table 1]
【0030】[0030]
【表2】 [Table 2]
【0031】耐摩耗性は、フリクトロン式摩擦摩耗試験
機を使用し、摩擦速度を0.238m/秒,摩擦距離を
6000m,摩擦荷重を160kg,相手材を硬質クロ
ムめっきしたSK−4鋼とした摩耗条件で調べた。そし
て、摩耗量が0〜100mgのものを◎,100〜30
0mgのものを○,300〜500mgのものを△,5
00mg以上のものを×として相対評価し、表2に示し
た。
As for the wear resistance, a SK-4 steel was used, in which a friction speed was 0.238 m / sec, a friction distance was 6000 m, a friction load was 160 kg, and a mating material was hard-chrome plated using a frictron type friction wear tester. It was examined under wear conditions. And, wear amount of 0 to 100 mg is ◎, 100 to 30
0 mg is ○, 300-500 mg is △, 5
Those having a dose of 00 mg or more were evaluated relative to each other and shown in Table 2.
【0032】表2から明らかなように、本発明で規定す
る範囲でSi,Cu,Mn,Cr等を含有する合金にあ
っては、何れも摩耗量が100mg以下の優れた耐摩耗
性を呈していることが判る。これに対し、たとえば試験
番号11及び13の合金にあっては、Si含有量がそれ
ぞれ13.0重量%及び12.0重量%と低いため、初
晶Siの晶出量が少なく、耐摩耗性が悪くなっている。
As is clear from Table 2, all the alloys containing Si, Cu, Mn, Cr, etc. within the range specified by the present invention exhibit excellent wear resistance with a wear amount of 100 mg or less. You can see that On the other hand, in the alloys of Test Nos. 11 and 13, for example, since the Si contents are as low as 13.0 wt% and 12.0 wt%, respectively, the amount of primary Si crystallized is small and the wear resistance is low. Is getting worse.
【0033】切削性試験は、超硬工具を使用し、切削速
度を200m/分,400m/分及び600m/分の3
段階、送り速度を0.05mm/回転,0.1mm/回
転及び0.2mm/回転の3段階、切込み量を0.5m
m,1.0mm及び2.0mmの3段階とした条件下で
行った。そして、切削長さが5000mに達したときの
切削工具の逃げ面の摩耗幅,切削抵抗及び仕上げ面粗さ
について調べ、表3に掲げた基準で4段階評価した。
For the machinability test, a cemented carbide tool was used, and the cutting speed was 200 m / min, 400 m / min and 600 m / min.
3 steps, feed rate 0.05mm / revolution, 0.1mm / revolution and 0.2mm / revolution, depth of cut 0.5m
m, 1.0 mm, and 2.0 mm. Then, the wear width, the cutting resistance, and the finished surface roughness of the flank of the cutting tool when the cutting length reached 5000 m were examined, and evaluated in four levels based on the criteria shown in Table 3.
【0034】[0034]
【表3】 [Table 3]
【0035】各試験項目についての評価点を合算し、合
計評価点が4点以下のものを◎,5〜7点のものを○,
8〜10点のものを△,10点を超えるものを×として
相対評価した。
The evaluation points of the respective test items are added up, and the total evaluation points are 4 or less, ⊚, 5 to 7 points are ∘,
Relative evaluation was made with a score of 8 to 10 as Δ and a score of more than 10 as x.
【0036】表2から明らかなように、Si,Cu,M
n,Cr等の合金成分が本発明で規定されている範囲に
ある場合、何れも良好な切削性が得られている。一般的
にみて、切削性は、Si含有量が高いものほど悪く、S
i含有量の低下に従って切削性が向上している。たとえ
ば、試験番号13の合金例では、Si含有量が12.0
重量%と低いことから、極めて優れた切削性が示されて
いる。
As is clear from Table 2, Si, Cu, M
When the alloy components such as n and Cr are in the range specified in the present invention, good machinability is obtained in all cases. Generally speaking, the machinability is worse as the Si content is higher, and S
The machinability improves as the i content decreases. For example, in the alloy example of test number 13, the Si content is 12.0.
Since it is as low as wt%, extremely excellent machinability is shown.
【0037】しかし、試験番号13の合金例は、初晶S
iの晶出がほとんど検出されず、耐摩耗性に劣ることは
前述した通りである。更に、硬質のCu,Mn,Cr系
化合物等の晶出量が少ないものほど、切削性に優れてい
ることが判る。
However, the alloy example of Test No. 13 has the primary crystal S
As described above, the crystallization of i was hardly detected and the abrasion resistance was poor. Further, it can be seen that the smaller the amount of hard Cu, Mn, Cr-based compound or the like crystallized out, the better the machinability.
【0038】溶解性は、アルミニウム合金の液相線温度
を中心として、溶製時のガス吸収やライニング耐火物の
損傷等を取り込んで相対評価し、優れているものを◎,
良好なものを○,やや悪いものを△,悪いものを×とし
て表示した。一般的にみて、Si含有量が1重量%増加
すると、アルミニウム合金の液相線温度が約10℃上昇
する。また、Pも液相線温度を上昇させる元素であり、
P含有量が0.05重量%を超えるようになると溶湯の
粘性が上昇し、湯回り性が低下する。
The solubility is relatively evaluated by focusing on the liquidus temperature of the aluminum alloy and taking in gas absorption at the time of melting, damage to the lining refractory, and the like.
The good ones are shown as O, the slightly bad ones as Δ, and the bad ones as X. Generally speaking, when the Si content increases by 1% by weight, the liquidus temperature of the aluminum alloy increases by about 10 ° C. P is also an element that raises the liquidus temperature,
When the P content exceeds 0.05% by weight, the viscosity of the molten metal increases and the hot running property deteriorates.
【0039】鋳造性は、鋳造温度,初晶Siの粒径及び
分布,湯回り性等について、表4に示した評価基準で判
定した。なお、初晶Siの粒径及び分布は、温度200
℃に保持した塗布無しのJIS4号舟型を使用して鋳造
した試料の中心部断面を観察することによって調べた。
The castability was judged according to the evaluation criteria shown in Table 4 regarding the casting temperature, the grain size and distribution of the primary crystal Si, the hot running property and the like. The grain size and distribution of the primary crystal Si is 200
It was examined by observing the central cross section of the sample cast using an uncoated JIS No. 4 boat type held at 0 ° C.
【0040】また、湯回り性は、300℃に保持した塗
布なしのクサビ金型を使用した鋳造によって調べた。こ
のクサビ金型は、図1及び図2に示す平断面で矩形状,
側断面で傾斜状のキャビティをもつものであった。そし
て、キャビティに広がった溶湯の面積を図1の矩形面積
で除した面積率で表した。この湯回り性が良好なもの
は、製品のエッジや刻印が明瞭なものとなる。
The hot running property was examined by casting using an uncoated wedge mold held at 300 ° C. This wedge mold has a rectangular cross section with a flat cross section as shown in FIGS.
It had an inclined cavity in the side section. Then, the area of the molten metal spread in the cavity was divided by the rectangular area of FIG. The product having good hot running property has clear edges and markings on the product.
【0041】[0041]
【表4】 [Table 4]
【0042】各試験項目についての評価点を合算し、合
計評価点が4点以下のものを◎,5〜7点のものを○,
8〜10点のものを△,10点を超えるものを×として
鋳造性を相対評価した。
The evaluation points for each test item are added together, and the total evaluation points are 4 or less, ⊚, 5 to 7 points are ∘,
Castability was relatively evaluated by assigning 8 to 10 points as Δ and exceeding 10 points as x.
【0043】表2に示されているように、Si,Fe,
P等の含有量が本発明で規定した範囲にある合金例で
は、良好な鋳造性が得られていることが判る。これに対
して、Si含有量が19.0重量%と多い試験番号14
の合金例では、鋳造可能な温度が780℃と高く、鋳造
性が悪くなっていた。そして、多数の鋳造欠陥が検出さ
れた。
As shown in Table 2, Si, Fe,
It can be seen that good castability is obtained in the alloy examples in which the content of P and the like is within the range specified in the present invention. On the other hand, Test No. 14 having a high Si content of 19.0% by weight
In the alloy example, the castable temperature was as high as 780 ° C., and the castability was poor. And many casting defects were detected.
【0044】以上の説明から明らかなように、本発明に
従ったアルミニウム合金は、耐摩耗性,切削性,溶解
性,鋳造性の何れにおいても優れた特性を呈している。
そのため、得られたアルミニウム合金鋳物は、シリンダ
ブロック,ピストン,コンプレッサ部品,変速機部品等
として、優れた特性を示す材質として使用される。ま
た、切削性が良好なことから、必要形状に仕上げる加工
も容易なものとなる。
As is clear from the above description, the aluminum alloy according to the present invention exhibits excellent characteristics in wear resistance, machinability, solubility and castability.
Therefore, the obtained aluminum alloy casting is used as a material exhibiting excellent characteristics as a cylinder block, a piston, a compressor part, a transmission part, and the like. Further, since the machinability is good, the processing for finishing into a required shape becomes easy.
【0045】[0045]
【発明の効果】以上に説明したように、本発明において
は、Si含有量を低下させて鋳造性を確保すると共に、
Cu,Mg,Mn,Cr,Ti,P等の合金成分を総合
的に規制することによって、耐摩耗性を損なうことな
く、溶解性,鋳造性,切削性等を改良している。そのた
め、溶解炉のライニング耐火物等に与える損傷を少なく
することができ、また金型の寿命も長くなる。しかも、
得られたアルミニウム合金鋳物を目標形状に機械切削す
るとき、切削工具の寿命も長くなる。このようにして、
シリンダブロック,ピストン,コンプレッサ部品,変速
機部品等として好適な材料が提供される。
As described above, in the present invention, the Si content is lowered to secure the castability, and
By comprehensively controlling alloying components such as Cu, Mg, Mn, Cr, Ti, P, the solubility, castability, machinability, etc. are improved without impairing wear resistance. Therefore, damage to the lining refractory of the melting furnace can be reduced, and the life of the mold is extended. Moreover,
When the obtained aluminum alloy casting is mechanically cut into a target shape, the life of the cutting tool is extended. In this way
Materials suitable for cylinder blocks, pistons, compressor parts, transmission parts, etc. are provided.
【図面の簡単な説明】[Brief description of drawings]
【図1】 本発明実施例において湯回り性を判定すると
きに使用した舟金型のキャビティを示す平面図
FIG. 1 is a plan view showing a cavity of a boat mold used when determining the hot running property in an example of the present invention.
【図2】 同キャビティの側面図FIG. 2 is a side view of the cavity.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 北岡 山治 静岡県庵原郡蒲原町蒲原1丁目34番1号 株式会社日軽技研内 (72)発明者 渡辺 靖彦 東京都港区三田3丁目13番12号 日本軽金 属株式会社内 (72)発明者 鞘師 守 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 神戸 洋史 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 渡辺 浩児 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 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yamaji Kitaoka 1-34 Kambara, Kambara-cho, Anbara-gun, Shizuoka Prefecture Nichiritsu Giken Co., Ltd. (72) Inventor Yasuhiko Watanabe 3-13 Mita, Minato-ku, Tokyo No. 12 In Japan Light Metals Co., Ltd. (72) Inventor Mamoru Sashishi 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Hiroshi Kobe 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Stock In-house (72) Inventor Hiroko Watanabe 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd.

Claims (3)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 Si:14.0〜16.0重量%,C
    u:2.0〜5.0重量%,Mg:0.1〜1.0重量
    %,Mn:0.3〜0.8重量%,Cr:0.1〜0.
    3重量%,Ti:0.05〜0.20重量%,P:0.
    003〜0.02重量%,Fe:1.5重量%以下を含
    有し、Ca含有量が0.005重量%未満に規制され、
    且つ平均粒径10〜50μmの初晶Siが均一に分散し
    た組織をもっていることを特徴とする耐摩耗性に優れた
    アルミニウム鋳造合金。
    1. Si: 14.0 to 16.0% by weight, C
    u: 2.0 to 5.0% by weight, Mg: 0.1 to 1.0% by weight, Mn: 0.3 to 0.8% by weight, Cr: 0.1 to 0.
    3% by weight, Ti: 0.05 to 0.20% by weight, P: 0.
    003 to 0.02% by weight, Fe: 1.5% by weight or less, and the Ca content is regulated to less than 0.005% by weight.
    An aluminum casting alloy having excellent wear resistance, which has a structure in which primary crystal Si having an average grain size of 10 to 50 μm is uniformly dispersed.
  2. 【請求項2】 Si:14.0〜16.0重量%,C
    u:2.0〜5.0重量%,Mg:0.1〜1.0重量
    %,Mn:0.3〜0.8重量%,Cr:0.1〜0.
    3重量%,Ti:0.05〜0.20重量%,P:0.
    003〜0.05重量%,Fe:1.5重量%以下,
    B:0.0001〜0.01重量%を含有し、Ca含有
    量が0.005重量%未満に規制され、且つ平均粒径1
    0〜50μmの初晶Siが均一に分散した組織をもって
    いることを特徴とする耐摩耗性に優れたアルミニウム鋳
    造合金。
    2. Si: 14.0 to 16.0% by weight, C
    u: 2.0 to 5.0% by weight, Mg: 0.1 to 1.0% by weight, Mn: 0.3 to 0.8% by weight, Cr: 0.1 to 0.
    3% by weight, Ti: 0.05 to 0.20% by weight, P: 0.
    003 to 0.05% by weight, Fe: 1.5% by weight or less,
    B: 0.0001 to 0.01 wt% is contained, the Ca content is regulated to less than 0.005 wt%, and the average particle size is 1
    An aluminum casting alloy having excellent wear resistance, which has a structure in which primary crystal Si of 0 to 50 μm is uniformly dispersed.
  3. 【請求項3】 Si:14.0〜16.0重量%,C
    u:2.0〜5.0重量%,Mg:0.1〜1.0重量
    %,Mn:0.3〜0.8重量%,Cr:0.1〜0.
    3重量%,Ti:0.05〜0.20重量%,P:0.
    003〜0.05重量%,Fe:1.5重量%以下,N
    i:0.3〜3.0重量%を含有し、Ca含有量が0.
    005重量%未満に規制され、且つ平均粒径10〜50
    μmの初晶Siが均一に分散した組織をもっていること
    を特徴とする耐摩耗性に優れたアルミニウム鋳造合金。
    3. Si: 14.0 to 16.0% by weight, C
    u: 2.0 to 5.0% by weight, Mg: 0.1 to 1.0% by weight, Mn: 0.3 to 0.8% by weight, Cr: 0.1 to 0.
    3% by weight, Ti: 0.05 to 0.20% by weight, P: 0.
    003 to 0.05% by weight, Fe: 1.5% by weight or less, N
    i: 0.3-3.0% by weight, Ca content: 0.
    Regulated to less than 005% by weight and having an average particle size of 10 to 50
    An aluminum casting alloy with excellent wear resistance, which has a structure in which μm of primary crystal Si is uniformly dispersed.
JP3270209A 1991-09-20 1991-09-20 Aluminum alloy with excellent wear resistance Expired - Lifetime JP2709663B2 (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672760A1 (en) * 1994-03-16 1995-09-20 Nippon Light Metal Co., Ltd. Wear resistant cast aluminum alloy and process of producing same
FR2825376A1 (en) * 2001-05-29 2002-12-06 Nippon Light Metal Co Fabrication of a wear resistant molded article from a molten hyper-eutectic aluminum-silicon alloy containing copper held at a predetermined temperature to regulate the metallurgical structure before casting
EP1452716A1 (en) * 2003-03-01 2004-09-01 KS Aluminium Technologie Aktiengesellschaft Monolitic Aluminium crackcase for highly stressed diesel engines
WO2005090625A1 (en) * 2004-03-23 2005-09-29 Nippon Light Metal Company, Ltd. Aluminum alloy excellent in wear resistance and sliding member using the same
JP2007119869A (en) * 2005-10-28 2007-05-17 Honda Motor Co Ltd Differential gear case and manufacturing method therefor
DE10357096B4 (en) * 2003-03-01 2014-05-15 Bayerische Motoren Werke Aktiengesellschaft Monolithic aluminum cylinder crankcase for heavy-duty diesel engines
CN104342590A (en) * 2013-07-31 2015-02-11 株式会社神户制钢所 Aluminum alloy extrudate for cutting
CN107619974A (en) * 2017-11-20 2018-01-23 山西瑞格金属新材料有限公司 A kind of high-strength high-elasticity modulus aluminium alloy and preparation method thereof

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Publication number Priority date Publication date Assignee Title
JPH01180938A (en) * 1988-01-12 1989-07-18 Ryobi Ltd Wear-resistant aluminum alloy
JPH01298131A (en) * 1988-05-25 1989-12-01 Kobe Steel Ltd Wear-resistant and high-strength aluminum alloy for casting
JPH01319646A (en) * 1988-06-21 1989-12-25 Kasei Naoetsu:Kk Aluminum alloy for casting having excellent vibration isolation performance
JPH03170634A (en) * 1989-11-28 1991-07-24 Shiyouteitsuku:Kk Wear-resistant aluminum alloy for plastic working excellent in heat treating property

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01180938A (en) * 1988-01-12 1989-07-18 Ryobi Ltd Wear-resistant aluminum alloy
JPH01298131A (en) * 1988-05-25 1989-12-01 Kobe Steel Ltd Wear-resistant and high-strength aluminum alloy for casting
JPH01319646A (en) * 1988-06-21 1989-12-25 Kasei Naoetsu:Kk Aluminum alloy for casting having excellent vibration isolation performance
JPH03170634A (en) * 1989-11-28 1991-07-24 Shiyouteitsuku:Kk Wear-resistant aluminum alloy for plastic working excellent in heat treating property

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672760A1 (en) * 1994-03-16 1995-09-20 Nippon Light Metal Co., Ltd. Wear resistant cast aluminum alloy and process of producing same
US5762728A (en) * 1994-03-16 1998-06-09 Nippon Light Metal Company Ltd. Wear-resistant cast aluminum alloy process of producing the same
FR2825376A1 (en) * 2001-05-29 2002-12-06 Nippon Light Metal Co Fabrication of a wear resistant molded article from a molten hyper-eutectic aluminum-silicon alloy containing copper held at a predetermined temperature to regulate the metallurgical structure before casting
EP1452716A1 (en) * 2003-03-01 2004-09-01 KS Aluminium Technologie Aktiengesellschaft Monolitic Aluminium crackcase for highly stressed diesel engines
DE10357096B4 (en) * 2003-03-01 2014-05-15 Bayerische Motoren Werke Aktiengesellschaft Monolithic aluminum cylinder crankcase for heavy-duty diesel engines
WO2005090625A1 (en) * 2004-03-23 2005-09-29 Nippon Light Metal Company, Ltd. Aluminum alloy excellent in wear resistance and sliding member using the same
EP1762631A1 (en) * 2004-03-23 2007-03-14 Nippon Light Metal Company Ltd. Aluminum alloy excellent in wear resistance and sliding member using the same
EP1762631A4 (en) * 2004-03-23 2007-10-24 Nippon Light Metal Co Aluminum alloy excellent in wear resistance and sliding member using the same
US7695577B2 (en) 2004-03-23 2010-04-13 Nippon Light Metal Company, Ltd. Aluminum alloy excellent in wear resistance and sliding member using this alloy
JP2007119869A (en) * 2005-10-28 2007-05-17 Honda Motor Co Ltd Differential gear case and manufacturing method therefor
CN104342590A (en) * 2013-07-31 2015-02-11 株式会社神户制钢所 Aluminum alloy extrudate for cutting
CN107619974A (en) * 2017-11-20 2018-01-23 山西瑞格金属新材料有限公司 A kind of high-strength high-elasticity modulus aluminium alloy and preparation method thereof
CN107619974B (en) * 2017-11-20 2019-07-26 山西瑞格金属新材料有限公司 A kind of high-strength high-elasticity modulus aluminium alloy and preparation method thereof

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