JP2820884B2 - Manufacturing method of aluminum alloy casting with excellent airtightness to be used as automotive intake system parts - Google Patents
Manufacturing method of aluminum alloy casting with excellent airtightness to be used as automotive intake system partsInfo
- Publication number
- JP2820884B2 JP2820884B2 JP6056218A JP5621894A JP2820884B2 JP 2820884 B2 JP2820884 B2 JP 2820884B2 JP 6056218 A JP6056218 A JP 6056218A JP 5621894 A JP5621894 A JP 5621894A JP 2820884 B2 JP2820884 B2 JP 2820884B2
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- Prior art keywords
- aluminum alloy
- casting
- intake system
- pores
- alloy casting
- 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.)
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- Manufacture And Refinement Of Metals (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えばマニホルドやコ
レクタなど気密と強度を要求される自動車用吸気系部品
となる気密性に優れたアルミニウム合金鋳物の製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a highly airtight aluminum alloy casting, such as a manifold or a collector, which is to be used as an automobile air intake system component requiring airtightness and strength.
【０００２】[0002]
【従来の技術】アルミニウム合金を溶解して、その溶湯
によりアルミニウム合金鋳物を鋳造すると、多くの場
合、鋳物の内部に水素ガスまたは引けによる気孔が発生
する。そういった鋳物を気体の通路部分や容器等の部品
に用いた際に部品の内外に漏れが発生することがあるの
は、鋳物内部の気孔などの欠陥がつながっている場合で
ある。つまり、鋳物の内部欠陥が水素ガスによる気孔で
あれ、引けによる気孔であれ、それが独立して存在して
いれば部品の内外の漏れは発生しない。2. Description of the Related Art When an aluminum alloy is melted and an aluminum alloy casting is cast from the molten metal, pores are often generated inside the casting due to hydrogen gas or shrinkage. When such a casting is used for a part such as a gas passage or a container, leakage may occur inside and outside the part when defects such as pores inside the casting are connected. In other words, whether the internal defect of the casting is a porosity caused by hydrogen gas or a porosity caused by shrinkage, if the porosity is present independently, no leakage occurs inside and outside the part.
【０００３】鋳物内部に発生する気孔は、図３に示すよ
うに、多くの場合結晶粒１の境界である結晶粒界５に存
在する。通常の鋳造法、例えば重力鋳造、低圧鋳造等で
得られるアルミ鋳物の内部に発生する気孔は図３に示す
ように非円形であり、気孔３ａと３ｂはつながりやすく
なる。As shown in FIG. 3, pores generated in a casting are present at crystal grain boundaries 5 which are boundaries of crystal grains 1 in most cases. Pores generated inside an aluminum casting obtained by a normal casting method, for example, gravity casting, low pressure casting, etc., are non-circular as shown in FIG. 3, and the pores 3a and 3b are easily connected.
【０００４】そのような形状の気孔３を持つアルミニウ
ム合金鋳物を、内外で圧力差の生じる部品、例えばマニ
ホルドやコレクタなどの自動車用吸気系部品に使用する
と、吸入空気が外部に漏れ、エンジン性能を損なう恐れ
が生じる。このため、従来は、アルミニウム合金溶湯中
のガスを除去する脱ガス処理等、水素ガスによる気孔の
発生を防ぐ種々の対策が採られてきた。When an aluminum alloy casting having the pores 3 having such a shape is used for a component that generates a pressure difference between inside and outside, for example, an intake system component for a vehicle such as a manifold or a collector, the intake air leaks to the outside and the engine performance is reduced. There is a risk of damage. For this reason, various measures have conventionally been taken to prevent the generation of pores due to hydrogen gas, such as a degassing treatment for removing gas in the aluminum alloy melt.
【０００５】しかし、脱ガスした溶湯により鋳造する
と、確かにアルミニウム合金鋳物の気孔発生は減少する
が、反対に肉厚変化の大きい部分の厚肉部位に、引けあ
るいはザク巣が発生しやすくなる。例えば、図４に示す
ように吸気系部品であるマニホルドやコレクタなどのボ
ス部７に引けあるいはザク巣１０が発生すると、このボ
ス部７にネジ加工を行った後に内と外がつながり、結果
として吸入空気が外部に漏れることになる。従って、水
素ガスによる気孔の発生に着目し、脱ガス処理を行うこ
とは、他の鋳造欠陥を招くことになり、気密性に優れた
アルミニウム合金鋳物を安定して得ること難しい。However, when casting is performed using the degassed molten metal, the generation of porosity in the aluminum alloy casting is certainly reduced, but on the contrary, shrinkage or pits are apt to be generated in the thick portion where the thickness change is large. For example, as shown in FIG. 4, when a boss 7 such as a manifold or a collector, which is an intake system component, is closed or a back pocket 10 is formed, the boss 7 is threaded, and then the inside and the outside are connected. The intake air leaks to the outside. Therefore, performing the degassing process while paying attention to the generation of pores due to the hydrogen gas causes other casting defects, and it is difficult to stably obtain an aluminum alloy casting having excellent airtightness.
【０００６】特公平５−６５５７３号公報には、Ａｌ−
Ｓｉ−Ｍｇ系またはＡｌ−Ｓｉ−Ｍｇ−Ｃｕ系合金に、
Ｃａを０．００１〜０．０１％添加することにより、不
純物Ｆｅの存在による引け巣の発生を防ぎ、気密性に優
れた鋳造用アルミニウム合金の開示がある。[0006] Japanese Patent Publication No. 5-65573 discloses Al-
For Si-Mg or Al-Si-Mg-Cu alloys,
There is a disclosure of a casting aluminum alloy having excellent airtightness by adding 0.001 to 0.01% of Ca to prevent shrinkage cavities due to the presence of impurity Fe.
【０００７】しかし、Ｃａを添加して引け巣を減少して
も、その引け巣の形状が非円形となり、気孔同士がつな
がる場合があり、そういったアルミニウム合金鋳物を内
外で圧力差があるような例えば自動車用吸気系部品とし
て用いるには、依然として問題が残されている。However, even if the shrinkage cavities are reduced by adding Ca, the shape of the shrinkage cavities becomes non-circular and the pores may be connected to each other. Problems still remain for use as automotive intake system components.
【０００８】鋳物の肉厚部に引け巣が発生することを防
止する方法として、溶湯に水素を添加して引け巣を分散
することが行われている。アルミニウム合金溶湯中に溶
解している水素は、溶湯の凝固時に水素溶解度が激減す
るので、次式に示すようにガス化して気泡となってアル
ミニウム合金鋳物中に残存して細かい気孔となる。この
ことから、水素は、凝固収縮の緩和と引け巣を細かい気
孔に分散する効果のあることが従来から知られている。 ２Ｈ（溶解）→Ｈ2 （ガス）[0008] As a method for preventing shrinkage cavities from being generated in a thick portion of a casting, hydrogen is added to a molten metal to disperse the shrinkage cavities. Hydrogen dissolved in the molten aluminum alloy has a drastic decrease in hydrogen solubility during solidification of the molten metal. Therefore, as shown in the following equation, hydrogen is gasified to form bubbles, which remain in the aluminum alloy casting and become fine pores. From this, it has been conventionally known that hydrogen has an effect of alleviating coagulation shrinkage and dispersing shrinkage cavities into fine pores. 2H (dissolution) → H 2 (gas)
【０００９】アルミニウム合金溶湯中へ水素を添加する
の製造方法としては、じゃがいもあるいは水を含ませた
布を溶湯に浸漬させる等して、次式に示すように水の分
解を利用する方法が従来から実施されている。 ２Ａｌ＋３Ｈ2 Ｏ→Ａｌ2 Ｏ3 ＋６Ｈ（溶解）A conventional method of adding hydrogen into a molten aluminum alloy is to use a decomposition method of water as shown in the following formula, for example, by dipping a cloth containing potatoes or water in the molten metal. Has been implemented since. 2Al + 3H 2 O → Al 2 O 3 + 6H ( dissolution)
【００１０】そのなかでも、水分を適量含むじゃがいも
が作業性に優れているため使用されることが多い。しか
し、じゃがいも等の水の分解を利用した添加方法では、
前式に示すようにアルミニウムの酸化物が生成されるた
めにノロが多量に発生し、そのノロを取り除く除滓作業
が必要になる。また、溶湯中にこの酸化物が混入するた
め、この溶湯で鋳造した鋳物中には膜状酸化物がガス発
生の起点となるために気孔が細長くなって各々がつなが
りやすくなり、気密性も低下する。Among them, potatoes containing an appropriate amount of moisture are often used because of their excellent workability. However, with the addition method utilizing the decomposition of water such as potatoes,
As shown in the above formula, a large amount of slag is generated due to the formation of an aluminum oxide, and a scrap removing operation for removing the slag is required. In addition, since this oxide is mixed into the molten metal, the film-like oxide becomes a starting point of gas generation in the casting cast with this molten metal, so that the pores are elongated and each of them is easily connected, and the airtightness is reduced. I do.
【００１１】一方、特公昭５１−４４０８４号公報に
は、アルミニウム溶湯が急激に凝固するのを防ぎ、かつ
結晶粒の大きさを制御するために１〜２５％のマグネシ
ウムを添加溶解し、次いで発泡を図りかつ合金の粘性向
上を図るため合金の液相線以下固相線以上の温度におい
てガスを発生するチタン水素化物を添加攪拌して鋳造す
る多孔質アルミニウム合金鋳物の製造法の開示がある。
この発明によれば、発泡性を持つアルミニウム合金鋳物
が得られ、その発泡の気孔率は約３０〜約６０％、気孔
の大きさは約０．０５〜約０．２０ｍｍとなる。しか
し、上記特公昭５１−４４０８４号公報では、気孔率、
気孔ともに大きすぎて気密性がなく、また機械的強度も
不足し、自動車用吸気系部品などには適用できない。On the other hand, Japanese Patent Publication No. 51-44084 discloses a method in which 1 to 25% of magnesium is added and dissolved in order to prevent rapid solidification of an aluminum melt and to control the size of crystal grains. There is disclosed a method for producing a porous aluminum alloy casting in which a titanium hydride which generates a gas at a temperature not lower than the liquidus line of the alloy and not lower than the solidus line is added and stirred to improve the viscosity of the alloy.
According to the present invention, an aluminum alloy casting having foamability is obtained, and the porosity of the foam is about 30 to about 60%, and the pore size is about 0.05 to about 0.20 mm. However, Japanese Patent Publication No. 51-44084 discloses a porosity,
Both pores are too large to be airtight and have insufficient mechanical strength, so that they cannot be applied to automobile intake system parts.
【００１２】本発明は、内外で圧力差のある部位に使用
される部品、例えばマニホルドやコレクタなどの自動車
吸気系部品の製造方法に関し、アルミニウム合金溶湯を
酸化させることなく水素を添加することにより、気孔を
気孔同士がつながることなく分散発生させ、肉厚部に引
けなどの鋳造欠陥のない自動車用吸気系部品となる気密
性に優れたアルミニウム合金鋳物の製造方法を提供する
ことを目的とする。[0012] The present invention relates to a method of manufacturing a part used in a part having a pressure difference inside and outside, for example, an automobile intake system part such as a manifold or a collector, and by adding hydrogen without oxidizing a molten aluminum alloy, It is an object of the present invention to provide a method for producing an aluminum alloy casting having excellent airtightness, in which pores are dispersed and generated without connecting the pores, and serve as an automobile intake system component having no casting defects such as shrinkage in a thick portion.
【００１３】[0013]
【課題を解決するための手段】本発明の自動車用吸気系
部品となる気密性に優れたアルミニウム合金鋳物の製造
方法は、（ＪＩＳ）ＡＣ４Ｂ組成となるアルミニウム合
金溶湯中に液相線以上の温度においてチタン水素化物を
重量比で０．００１％〜０．１０％添加した後、鋳造す
ることを特徴とする。そして、前記自動車用吸気系部品
となる気密性に優れたアルミニウム合金鋳物が、肉厚５
ｍｍ部を有するマニホルドであることを特徴とする。SUMMARY OF THE INVENTION The method of the present invention for producing a highly airtight aluminum alloy casting which is to be used as a vehicle air intake system component comprises the steps of: (a) subjecting a molten aluminum alloy having an AC4B composition to a temperature above the liquidus temperature; Is characterized in that titanium hydride is added in a weight ratio of 0.001% to 0.10% and then cast. Then, the aluminum alloy casting having excellent airtightness, which is used as the automobile intake system component, has a thickness of 5 mm.
It is a manifold having an mm part.
【００１４】[0014]
【作用】金属水素化物は、水素吸蔵合金として使われて
いるように、温度上昇に伴って水素を放出する性質を持
っていることから、７００℃程度のアルミニウム合金溶
湯中に添加すれば、以下の式で示すように水素を添加す
ることが可能である。金属水素化物による水素添加によ
り、アルミニウム合金鋳物中に含まれるガスは細かい気
孔に分散し、かつ金属水素化物は酸素を殆ど含有してい
ないので、アルミニウム合金溶湯を酸化させることが少
ない。 ＭＨ→Ｍ＋Ｈ （ここで、Ｍ：金属）[Function] Since metal hydride has the property of releasing hydrogen with a rise in temperature, as is used as a hydrogen storage alloy, if it is added to a molten aluminum alloy at about 700 ° C, It is possible to add hydrogen as shown by the formula: By the hydrogenation with the metal hydride, the gas contained in the aluminum alloy casting is dispersed into fine pores, and the metal hydride hardly contains oxygen, so that the molten aluminum alloy is less likely to be oxidized. MH → M + H (where M: metal)
【００１５】かかる金属水素化物としては、ＴｉＨ2 、
Ｍｇ2ＮｉＨ2、ＭｇＨ2 等を用いることができる。特に
チタン水素化物を用いるのが好ましい。チタン水素化物
はアルミニウム合金の結晶粒を微細化し、機械的強度を
向上させる作用を持つチタンと水素との化合物であるか
らである。その際、アルミニウム合金溶湯中には、重量
比で、０．００１％〜０．１０％のチタン水素化物を添
加する。チタン水素化物が０．００１％未満では気孔を
発生させる効果がなく、０．１０％を越えては、気孔、
気孔率とも大きくなり、気密性、機械的強度が得られな
いからである。Such metal hydrides include TiH 2 ,
Mg 2 NiH 2 , MgH 2 or the like can be used. In particular, it is preferable to use titanium hydride. This is because titanium hydride is a compound of titanium and hydrogen that has a function of refining crystal grains of an aluminum alloy and improving mechanical strength. At that time, 0.001% to 0.10% by weight of titanium hydride is added to the molten aluminum alloy. If titanium hydride is less than 0.001%, there is no effect of generating pores, and if it exceeds 0.10%, pores and
This is because the porosity also increases, and airtightness and mechanical strength cannot be obtained.
【００１６】[0016]
【実施例】以下、本発明の実施例を詳細に説明する。 （実施例１）（ＪＩＳ）ＡＣ４Ｂアルミニウム合金１０
ｋｇを黒鉛坩堝で溶解して７００℃に保持し、チタン水
素化物（ＴｉＨ2 ）を重量比で、０．００１％〜０．０
９％添加した。そして、銅製金型に鋳造し、試料を作製
した。Embodiments of the present invention will be described below in detail. (Example 1) (JIS) AC4B aluminum alloy 10
kg was melted in a graphite crucible and kept at 700 ° C., and titanium hydride (TiH 2 ) was added in a weight ratio of 0.001% to 0.01%.
9% was added. Then, it was cast in a copper mold to prepare a sample.
【００１７】表１は、ＴｉＨ2 添加前の溶湯、本発明例
のＴｉＨ2 を添加した溶湯、および従来例のじゃがいも
を添加した溶湯を各々同じ銅製金型により作製した鋳造
品の水素量、酸素量およびノロ発生状況を示すものであ
る。なお、水素量は、銅製金型で急冷した鋳造品の下部
から分析試料を採取し、ランズレー式水素分析法により
測定した。また、酸素量は水素量測定と同様に、鋳造品
の下部から採取した分析試料を不活性ガス中融解赤外線
吸収法により分析して測定した。Table 1 shows the hydrogen content and the oxygen content of the castings prepared by using the same copper mold as the molten metal before the addition of TiH 2, the molten metal of the present invention with the addition of TiH 2 , and the molten metal of the prior art with the addition of potato. It shows the amount and the state of slag generation. The amount of hydrogen was measured by a Lansley hydrogen analysis method by collecting an analysis sample from the lower part of a cast product quenched by a copper mold. Further, the oxygen content was measured by analyzing an analytical sample taken from the lower part of the casting by an infrared absorption method in an inert gas in the same manner as the hydrogen content measurement.
【００１８】 （表１） 添加材 添加量 水素量 酸素量 ノロの発生 (wt％) (cc/100g) (wt％) 添加前 − − 0.18 0.002 − 本発明例 1 TiH2 0.001 0.24 0.002 無 2 TiH2 0.002 0.29 0.002 無 3 TiH2 0.004 0.41 0.002 無 4 TiH2 0.006 0.52 0.002 無 5 TiH2 0.010 0.54 0.002 無 6 TiH2 0.090 0.63 0.002 無 比較例 7 じゃがいも 0.05 0.52 0.006 大 (Table 1) Additives Additive amount Hydrogen amount Oxygen amount Generation of slag (wt%) (cc / 100g) (wt%) Before addition--0.18 0.002-Inventive example 1 TiH 2 0.001 0.24 0.002 None 2 TiH 2 0.002 0.29 0.002 None 3 TiH 2 0.004 0.41 0.002 None 4 TiH 2 0.006 0.52 0.002 None 5 TiH 2 0.010 0.54 0.002 None 6 TiH 2 0.090 0.63 0.002 None Comparative Example 7 Potato 0.05 0.52 0.006 Large
【００１９】本発明例１〜６から、アルミニウム合金溶
湯にＴｉＨ2 を添加したものは、添加前に比べ水素量が
増加しており、ＴｉＨ2 添加量０．００１％で水素添加
が可能であることがわかる。これまでの経験から水素量
は０．３ｃｃ／１００ｇ程度以上であれば引け巣の分散
に有効であることがわかっているので、ＴｉＨ2 の添加
量は０．００２％以上が好ましい。From Examples 1 to 6 of the present invention, the addition of TiH 2 to the molten aluminum alloy has a greater amount of hydrogen than before the addition, and hydrogenation is possible with the addition of 0.001% TiH 2. You can see that. Experience has shown that a hydrogen content of about 0.3 cc / 100 g or more is effective in dispersing shrinkage cavities. Therefore, the addition amount of TiH 2 is preferably 0.002% or more.
【００２０】一方、比較例７のじゃがいも添加でも、水
素量は０．５２ｃｃ／１００ｇになっているが、ノロが
大量に発生する。そのノロを取り除いた後の溶湯から採
取した分析試料の酸素量は０．００２％から０．００６
％に増加していることから、溶湯中の酸化物も３倍程度
に増加しているものと思われる。これに対し、ＴｉＨ2
では酸素量は全く増加せず、ノロの発生も殆どない。On the other hand, even when the potatoes of Comparative Example 7 were added, the amount of hydrogen was 0.52 cc / 100 g, but a large amount of slag was generated. The oxygen content of the analysis sample collected from the molten metal after removing the slag is 0.002% to 0.006%.
%, It is considered that the oxide in the molten metal also increased about three times. In contrast, TiH 2
In this case, the amount of oxygen does not increase at all and almost no slag is generated.
【００２１】（実施例２） （ＪＩＳ）ＡＣ４Ｂアルミニウム合金を黒鉛坩堝で溶解
して７００℃に保持し、チタン水素化物（ＴｉＨ2 ）を
重量比で０．０１０％添加した。この溶湯を用いて、図
５に示す薄肉部の肉厚５ｍｍのマニホルド４を１００個
鋳造した。Example 2 (JIS) AC4B aluminum alloy was melted in a graphite crucible and kept at 700 ° C., and 0.010% by weight of titanium hydride (TiH 2 ) was added. Using this molten metal, 100 manifolds 4 having a thickness of 5 mm in a thin portion shown in FIG. 5 were cast.
【００２２】そして、マニホルド４の開口部６ａ、６ｂ
を閉鎖して水没し、内部に０．３ＭＰａの空気圧をかけ
て漏れの発生を検査した。その結果、鋳造した１００個
とも漏れは発生せず、気密性が良く、吸気系部品として
優れていることがわかった。また、肉厚５ｍｍ部の断面
の気孔の状況を図１に示すが、膜状酸化物が少ないた
め、気孔３ｃは微細球状になっている。一方、図２に比
較例７のじゃがいも添加による溶湯により作製した鋳物
の肉厚５ｍｍ部の断面の気孔の状況を示すが、膜状酸化
物が多いため気孔３ｃが粗大で細長くなっている。上記
の本発明例では、金属水素化物としてチタン水素化物
（ＴｉＨ2 ）について示したが、他の金属水素化物でも
同様の効果が得られる。The openings 6a, 6b of the manifold 4
Was closed and immersed in water, and an air pressure of 0.3 MPa was applied to the inside to inspect the occurrence of leakage. As a result, it was found that no leakage occurred in any of the 100 casts, the airtightness was good, and the casting was excellent as an intake system component. FIG. 1 shows the state of pores in a cross section having a thickness of 5 mm. The pores 3c have a fine spherical shape due to a small amount of film oxide. On the other hand, FIG. 2 shows the condition of pores in a cross section of a 5 mm-thick portion of a casting made of a molten metal by adding potatoes of Comparative Example 7, and the pores 3c are coarse and elongated because of a large amount of film oxide. In the above example of the present invention, titanium hydride (TiH 2 ) is shown as the metal hydride, but the same effect can be obtained with other metal hydrides.
【００２３】[0023]
【発明の効果】以上、詳細に説明した通り、本発明の自
動車用吸気系部品となる気密性に優れたアルミニウム合
金鋳物の製造方法は、（ＪＩＳ）ＡＣ４Ｂ組成となるア
ルミニウム合金溶湯中に液相線以上の温度においてチタ
ン水素化物を重量比で０．００１％〜０．１０％添加し
た後、鋳造することにより溶湯を酸化させることなく水
素添加でき、ノロなどの除滓作業も不要で、酸化物も増
加せずに、鋳物の引け巣を細かい気孔に分散させること
ができる。本発明の製造方法による自動車用吸気系部品
となる気密性に優れたアルミニウム合金鋳物は、肉厚５
ｍｍ部を有するマニホルドやコレクタなどに用いて有用
である。As described above in detail, the method for producing an aluminum alloy casting having excellent airtightness to be used as a vehicle air intake system component according to the present invention is described in (JIS). After adding 0.001% to 0.10% by weight of titanium hydride at a temperature equal to or higher than the temperature of the wire, casting allows casting to add hydrogen without oxidizing the molten metal. The shrinkage cavities of the casting can be dispersed into fine pores without increasing the number of objects. The aluminum alloy casting having excellent airtightness to be used as a vehicle intake system component by the manufacturing method of the present invention has a thickness of 5 mm.
It is useful for a manifold or a collector having an mm part.
【図１】本発明の一実施例の水素化チタンを鋳造用アル
ミニウム合金溶湯に添加して得られたアルミニウム合金
鋳物内部断面の結晶粒の状況を示す図である。FIG. 1 is a view showing a state of crystal grains in an internal cross section of an aluminum alloy casting obtained by adding titanium hydride of one embodiment of the present invention to a molten aluminum alloy for casting.
【図２】比較例のじゃがいもを鋳造用アルミニウム合金
溶湯に添加して得られたアルミニウム合金鋳物内部断面
の結晶粒の状況を示す図である。FIG. 2 is a view showing a state of crystal grains in an internal cross section of an aluminum alloy casting obtained by adding a potato of a comparative example to a molten aluminum alloy for casting.
【図３】アルミニウム合金鋳物の結晶粒界に発生する気
孔を示す図である。FIG. 3 is a diagram showing pores generated in crystal grain boundaries of an aluminum alloy casting.
【図４】自動車用吸気系部品のマニホルドやコレクタな
どのボス部に発生する引け巣あるいはザク巣の態様を示
す図である。FIG. 4 is a view showing a form of a shrinkage cavity or a back cavity generated in a boss portion such as a manifold or a collector of a vehicle intake system component.
【図５】自動車用吸気系部品としてのマニホルドの外観
形状を示す図である。FIG. 5 is a diagram showing an external shape of a manifold as an automobile intake system component.
１：結晶粒、 ３：気孔、 ４：マニホル
ド、 ５：結晶粒界、６：開口部、 ７：ボス
部、 １０：ザク巣。1: Crystal grains, 3: Pores, 4: Manifold, 5: Grain boundaries, 6: Opening, 7: Boss, 10: Zaku nest.
フロントページの続き (56)参考文献 特開 昭50−159810（ＪＰ，Ａ) 特開 平３−230859（ＪＰ，Ａ) 特開 平１−127631（ＪＰ，Ａ) 特開 昭57−35653（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C22C 1/02 C22C 1/08 B22D 21/04 F02M 35/104Continuation of the front page (56) References JP-A-50-159810 (JP, A) JP-A-3-230859 (JP, A) JP-A-1-127631 (JP, A) JP-A-57-35653 (JP, A) , A) (58) Field surveyed (Int. Cl. 6 , DB name) C22C 1/02 C22C 1/08 B22D 21/04 F02M 35/104
Claims (2)
ウム合金溶湯中に液相線以上の温度においてチタン水素
化物を重量比で０．００１％〜０．１０％添加した後、
鋳造することを特徴とする自動車用吸気系部品となる気
密性に優れたアルミニウム合金鋳物の製造方法。1. (JIS) After adding 0.001% to 0.10% by weight of titanium hydride to a molten aluminum alloy having an AC4B composition at a temperature not lower than the liquidus line,
A method for producing an aluminum alloy casting having excellent airtightness, which is to be used as an automobile intake system component , characterized by being cast.
ｍ部を有するマニホルドであることを特徴とする請求項
１記載の自動車用吸気系部品となる気密性に優れたアル
ミニウム合金鋳物の製造方法。2. The aluminum alloy casting has a thickness of 5 m.
The method for producing an aluminum alloy casting having excellent airtightness as an automobile intake system component according to claim 1, wherein the manifold is a manifold having an m-part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6056218A JP2820884B2 (en) | 1993-03-26 | 1994-03-25 | Manufacturing method of aluminum alloy casting with excellent airtightness to be used as automotive intake system parts |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6780693 | 1993-03-26 | ||
| JP5-67806 | 1993-03-26 | ||
| JP6056218A JP2820884B2 (en) | 1993-03-26 | 1994-03-25 | Manufacturing method of aluminum alloy casting with excellent airtightness to be used as automotive intake system parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06330204A JPH06330204A (en) | 1994-11-29 |
| JP2820884B2 true JP2820884B2 (en) | 1998-11-05 |
Family
ID=26397166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6056218A Expired - Lifetime JP2820884B2 (en) | 1993-03-26 | 1994-03-25 | Manufacturing method of aluminum alloy casting with excellent airtightness to be used as automotive intake system parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2820884B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10123899A1 (en) * | 2001-05-16 | 2002-11-21 | Goldschmidt Ag Th | Production of metal molded parts comprises placing a metal body with closed surfaces on all sides and a hollow structure inside into a mold, and filling the remaining mold hollow space with a metal or metal alloy |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5216841B2 (en) * | 1974-06-18 | 1977-05-12 | ||
| JPS5735653A (en) * | 1980-08-12 | 1982-02-26 | Nissan Motor Co Ltd | Manufacture of aluminum alloy member having pinhole |
| JPH01127631A (en) * | 1987-11-10 | 1989-05-19 | Agency Of Ind Science & Technol | Production of foamed metal |
| JPH03230859A (en) * | 1990-02-07 | 1991-10-14 | Mitsubishi Heavy Ind Ltd | Manufacture of light aluminum casting |
-
1994
- 1994-03-25 JP JP6056218A patent/JP2820884B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06330204A (en) | 1994-11-29 |
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