WO2013150700A1 - Aluminum alloy for die cast, and aluminum alloy die cast produced using same - Google Patents
Aluminum alloy for die cast, and aluminum alloy die cast produced using same Download PDFInfo
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- WO2013150700A1 WO2013150700A1 PCT/JP2013/000748 JP2013000748W WO2013150700A1 WO 2013150700 A1 WO2013150700 A1 WO 2013150700A1 JP 2013000748 W JP2013000748 W JP 2013000748W WO 2013150700 A1 WO2013150700 A1 WO 2013150700A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
Definitions
- the present invention relates to an aluminum alloy for die casting with reduced casting cracks and an aluminum alloy die casting using the alloy.
- Aluminum alloys are widely used as component materials in automobiles, industrial machinery, aircraft, home appliances, and various other fields because of their properties such as light weight and excellent thermal conductivity and high corrosion resistance.
- One of them is the field of aluminum alloys for die casting, and a representative example thereof is ADC12 of an alloy for Al—Si—Cu based die casting specified in Japanese Industrial Standard JIS H5302.
- the ADC 12 is widely used for applications such as covers and cases such as carburetors, cylinder blocks, and cylinder head covers of automobiles, or die casting parts other than automobiles because of its good fluidity and filling property at the time of casting (die casting) It has
- ADC12 is widely used for die casting, but when the die cast to be cast is thin or depending on its shape, a phenomenon in which the die cast casted at the time of mold opening or product extrusion is broken, so-called "cast cracking" It can happen. If this casting crack occurs, the defect rate will increase, leading to an increase in cost, and in some cases, it will be necessary to change the product shape so that casting cracks are unlikely to occur, which results in a problem that the product shape will be restricted. There was.
- Patent Document 1 discloses Be (beryllium) in the Al-Si based aluminum alloy as 0. A technology for blending 0005 to 0.01% is disclosed.
- the formation of the aluminum oxide film on the surface of the molten aluminum alloy is suppressed, and the fluidity of the molten aluminum alloy is improved.
- the thin die casting can be easily manufactured.
- cost and labor are required to ensure the safety of workers when manufacturing aluminum alloys for die-casting, so aluminum alloys capable of manufacturing thin-walled die-casts can be efficiently used. There is a problem that it is difficult to manufacture economically.
- the main object of the present invention is an aluminum alloy for die-casting having seizing resistance, flowability and filling property while being hard to cause casting cracks and capable of thinning while being a highly safe and easy formulation. It is an object of the present invention to provide an aluminum alloy for die-casting which has a high degree of freedom in product shape and mechanical characteristics equivalent to those of ADC 12 and an aluminum alloy die-cast made of the alloy.
- the compounding ratio of Mg which is considered to have the largest influence on the casting cracking is suppressed to 0.09 wt% or less, the casting cracking is less likely to occur, while the strength decreased by the Mg reduction is It compensates by adding 0.20 weight% or more and 1.50 weight% or less of Cu.
- Si is incorporated in an amount of 6.0% by weight or more and less than 10.0% by weight, the fluidity of the molten aluminum alloy can be improved while suppressing the occurrence of casting cracks, and the upper limit of Fe is 1.0.
- Mn at an upper limit of 0.45 wt% and Cr at an upper limit of 0.50 wt% seizure can be prevented while maintaining an appropriate melting temperature.
- an ingot of an aluminum alloy for die-casting which is resistant to casting cracking and at the same time has seizure resistance, fluidity and filling property only by blending six kinds of elemental components in a predetermined ratio. It can be manufactured safely and easily.
- a second invention of the present invention is an aluminum alloy die cast made by die casting of the aluminum alloy for die casting according to the first invention.
- the aluminum alloy die cast by the die casting aluminum alloy according to the first invention of the present invention is less likely to cause casting cracks, so that thin articles can be mass-produced with good castability, and it has mechanical properties substantially equivalent to that of ADC12. For example, it can be applied to a wide range of applications such as automobile parts, optical parts, industrial machine parts, household appliances and the like.
- the present invention is a highly safe and easy-to-use aluminum alloy for die-casting which has both seizure resistance and fluidity / fillability while being difficult to cause casting cracks and capable of being thinned while being a simple formulation. It is possible to provide an aluminum alloy for die casting having a high degree of freedom in product shape and mechanical characteristics equivalent to that of the ADC 12, and an aluminum alloy die cast from the alloy.
- the aluminum alloy for die casting according to the present invention (hereinafter, also simply referred to as "aluminum alloy”) is mainly 0.20 wt% or more and 1.50 wt% or less of Cu (copper), 6.0 wt% or more Less than 10.0 wt% Si (silicon; silicon), 0.09 wt% or less Mg (magnesium), 1.0 wt% or less Fe (iron), 0.45 wt% or less Mn (manganese) and It contains 0.50% by weight or less of Cr (chromium), and the balance is composed of Al (aluminum) and unavoidable impurities.
- aluminum alloy is mainly 0.20 wt% or more and 1.50 wt% or less of Cu (copper), 6.0 wt% or more Less than 10.0 wt% Si (silicon; silicon), 0.09 wt% or less Mg (magnesium), 1.0 wt% or less Fe (iron), 0.45 wt% or
- Cu copper
- Mg which has the largest influence on the casting cracking
- the blending ratio of Cu with respect to the weight of the entire aluminum alloy is preferably in the range of 0.20 wt% or more and 1.50 wt% or less.
- the strength improvement effect by the blending of Cu is not sufficiently recognized, and conversely, when the blending ratio of Cu is more than 1.50 wt%, the strength improves Although the effect is remarkable, it is because casting cracks become a concern.
- Si silicon (silicon; silicon) is for improving the flowability and the filling property to the mold when the aluminum alloy is melted and pressure-casted.
- the compounding ratio of Si with respect to the weight of the whole aluminum alloy is in the range of 6.0% by weight or more and less than 10.0% by weight as described above.
- the blending ratio of Si is less than 6.0% by weight, the melting temperature and the casting temperature of the aluminum alloy become high, and the fluidity at the time of melting the aluminum alloy is lowered, so that the fluidity is sufficient at the time of die casting
- the blending ratio of Si is 10.0% by weight or more, the fluidity at the time of melting of the aluminum alloy is sufficient, but casting cracks easily occur.
- Mg manganesium
- Mg 2 Si is mainly present in the form of a solid solution in an Al base material in an aluminum alloy or as Mg 2 Si and imparts a yield strength and a tensile strength to the aluminum alloy while having the greatest effect on casting cracks. It is an ingredient to exert.
- the compounding ratio of Mg with respect to the weight of the whole aluminum alloy is 0.09 weight% or less range as mentioned above. If the blending ratio of Mg is more than 0.09% by weight, the casting cracks are likely to occur rapidly.
- Fe iron
- this Fe crystallizes needle-like crystals consisting of Al-Si-Fe, and reduces the toughness of the aluminum alloy, and when added in large amounts, makes it difficult to melt at an appropriate temperature. Therefore, in the present invention, the content of Fe is suppressed to 1.0% by weight or less based on the weight of the entire aluminum alloy.
- Mn manganese
- Mn manganese
- the Mn content is suppressed to 0.45% by weight or less based on the weight of the entire aluminum alloy.
- Al having a high Mn content such as aluminum can recovery material Mn-based scrap can be used as part of the alloy material.
- Cr chromium
- Cr is present mainly in the molten state when the aluminum alloy is in a molten state, and in the solid state it exists in a solid solution state in the Al phase or in a crystallized state as a Cr compound, Similarly, it is for preventing seizing between the aluminum alloy and the die at the time of die casting.
- Cr also makes it difficult to melt at a suitable temperature if added in large amounts, so in the present invention, the content of Cr is 0.50% by weight or less based on the weight of the entire aluminum alloy. I'm holding back.
- the total of the blending ratio of Fe, Mn, and Cr is 0.40% by weight or more based on the weight of the entire alloy. And preferably in the range of 1.95% by weight or less, more preferably in the range of 0.50% by weight or more and 1.95% by weight or less.
- the blending ratio of Cu, Si, Mg, Fe, Mn and Cr is adjusted according to the above blending ratio, although it is a simple and highly safe formulation, casting cracking is unlikely to occur and thinning is possible, and at the same time seizure resistance It is possible to obtain an aluminum alloy base metal for die-casting that has both the properties, flowability and filling properties.
- At least one selected from Na (sodium), Sr (strontium), Ca (calcium) and Sb (antimony) may be added as the improvement treatment material.
- an improvement treatment material particles of eutectic Si can be made finer, and the toughness and strength of the aluminum alloy can be further improved.
- At least one of Ti (titanium) and B (boron) may be added in place of the above-mentioned improved treatment material or together with the improved treatment material.
- Ti and B titanium
- the crystal grains of the aluminum alloy can be refined, and the elongation of the alloy can be improved. Such an effect is remarkable particularly when the amount of Si is small.
- raw materials are prepared in which the respective elemental components of Al, Cu, Si, Mg, Fe, Mn, and Cr have the above-described predetermined ratio. Subsequently, the raw material is put into a melting furnace such as a forging furnace-containing melting furnace or a closed melting furnace to melt these materials.
- the molten raw material thus melted that is, the molten metal of the aluminum alloy, is subjected to a purification treatment such as dehydrogenation treatment and removal treatment, if necessary.
- the refined molten metal is poured into a predetermined mold or the like and solidified to form a molten metal of an aluminum alloy into an alloy base metal ingot or the like.
- solution treatment, aging treatment and the like are performed as needed.
- the mechanical properties of the aluminum alloy casting can be improved by subjecting the aluminum alloy die cast to solution treatment, aging treatment and the like.
- Example 1 0.21% by weight of Cu, 7.88% by weight of Si, 0.04% by weight of Mg, 0.22% by weight of Fe, and 0% of Mn .04% by weight, 0.36% by weight of Cr and the balance being Al and unavoidable impurities, a molten metal is prepared to be within the range of the elemental composition of the aluminum alloy for die casting in the present invention did.
- this molten metal was die-casted under the following conditions using a normal die-casting machine (DC 250 JMT manufactured by Toshiba Machine Co., Ltd.) having a clamping force of 250 tons, and the presence or absence of casting cracks was measured.
- DC 250 JMT manufactured by Toshiba Machine Co., Ltd.
- Example 2 0.92 wt% of Cu, 8.21 wt% of Si, 0.00 wt% of Mg, 0.14 wt% of Fe and 0 wt% of Mn
- a sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that .00 wt% and the blending ratio of Cr was 0.37 wt%.
- the cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
- the mechanical characteristic it measured using the board
- Example 3 0.70% by weight of Cu, 7.02% by weight of Si, 0.01% by weight of Mg, 0.86% by weight of Fe, and 0% of Mn
- a sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 21 wt% and the blending ratio of Cr was 0.00 wt%.
- the cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
- Example 4 The blending ratio of Cu is 0.72 wt%, the blending ratio of Si is 7.75 wt%, the blending ratio of Mg is 0.01 wt%, the existing ratio of Fe is 0.82 wt%, the blending ratio of Mn is 0
- a sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 42 wt% and the blending ratio of Cr was 0.00 wt%.
- the cast cracking incidence (%) of the obtained sample is shown in Table 1.
- Example 5 1.03% by weight of Cu, 6.15% by weight of Si, 0.01% by weight of Mg, 0.84% by weight of Fe, and 0% of Mn
- a sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that 34 wt% and the blending ratio of Cr was 0.00 wt%.
- the cast cracking incidence (%) of the obtained sample is shown in Table 1.
- Example 6 1.05% by weight of Cu, 6.91% by weight of Si, 0.01% by weight of Mg, 0.86% by weight of Fe, and 0% of Mn
- a sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 21 wt% and the blending ratio of Cr was 0.00 wt%.
- the cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
- Example 7 The blending ratio of Cu is 1.11 wt%, the blending ratio of Si is 6.92 wt%, the blending ratio of Mg is 0.04 wt%, the existing ratio of Fe is 0.84 wt%, the blending ratio of Mn is 0
- a sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that the blending ratio of Cr was set to 0.00 wt%, and 20 wt%.
- the cast cracking incidence (%) of the obtained sample is shown in Table 1.
- Example 8 The blending ratio of Cu is 1.13 wt%, the blending ratio of Si is 6.97 wt%, the blending ratio of Mg is 0.07 wt%, the existing ratio of Fe is 0.85 wt%, the blending ratio of Mn is 0
- a sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that the blending ratio of Cr was set to 0.00 wt%, and 20 wt%.
- the cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
- Example 9 The blending ratio of Cu is 1.13 wt%, the blending ratio of Si is 6.99 wt%, the blending ratio of Mg is 0.05 wt%, the existing ratio of Fe is 0.85 wt%, the blending ratio of Mn is 0
- a sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that the blending ratio of Cr was set to 0.00 wt%, and 20 wt%.
- the cast cracking incidence (%) of the obtained sample is shown in Table 1.
- Example 10 The mixing ratio of Cu is 1.32% by weight, the mixing ratio of Si is 7.75% by weight, the mixing ratio of Mg is 0.01% by weight, the existing ratio of Fe is 0.82% by weight, the mixing ratio of Mn is 0
- a sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 43 wt% and the blending ratio of Cr was 0.00 wt%.
- the cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
- Example 11 0.53% by weight of Cu, 7.91% by weight of Si, 0.09% by weight of Mg, 0.39% by weight of Fe, 0% of Mn
- a sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that .09 wt% and the blending ratio of Cr was 0.34 wt%.
- the cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
- Example 12 0.54% by weight of Cu, 9.94% by weight of Si, 0.00% by weight of Mg, 0.11% by weight of Fe, and 0% of Mn
- a sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that .00 wt% and the blending ratio of Cr was 0.30 wt%.
- the cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
- Example 13 0.54% by weight of Cu, 9.98% by weight of Si, 0.00% by weight of Mg, 0.28% by weight of Fe, and 0% of Mn
- a sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that .00 wt% and the blending ratio of Cr was 0.30 wt%.
- the cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
- Example 14 0.54% by weight of Cu, 9.98% by weight of Si, 0.00% by weight of Mg, 0.44% by weight of Fe, and 0% of Mn
- a sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that .00 wt% and the blending ratio of Cr was 0.29 wt%.
- the cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
- Example 15 0.51% by weight of Cu, 7.55% by weight of Si, 0.00% by weight of Mg, 0.45% by weight of Fe, and 0% of Mn
- a sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that .00 wt% and the blending ratio of Cr was 0.33 wt%.
- the cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
- Comparative Example 1 The mixing ratio of Cu is 0.53% by weight, the mixing ratio of Si is 10.0% by weight, the mixing ratio of Mg is 0.00% by weight, the existing ratio of Fe is 0.68% by weight, the mixing ratio of Mn is 0 .01% by weight, 0.30% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
- Comparative Example 2 0.00 wt% of Cu, 12.6 wt% of Si, 0.00 wt% of Mg, 0.12 wt% of Fe, and 0 of Mn .01% by weight, 0.39% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
- Comparative Example 3 0.01% by weight of Cu, 7.95% by weight of Si, 0.15% by weight of Mg, 0.92% by weight of Fe, and 0% of Mn .01 wt%, the blending ratio of Cr is 0.27 wt%, and the remainder is Al inevitable impurities and unavoidable impurities, except that it is prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
- Comparative Example 4 0.93% by weight of Cu, 8.07% by weight of Si, 0.15% by weight of Mg, 0.73% by weight of Fe, and 0% of Mn .20% by weight, 0.31% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
- Comparative Example 5 1.02% by weight of Cu, 8.20% by weight of Si, 0.23% by weight of Mg, 0.90% by weight of Fe, and 0% of Mn .17% by weight, 0.07% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
- Comparative Example 6 The mixing ratio of Cu is 1.14% by weight, the mixing ratio of Si is 7.03% by weight, the mixing ratio of Mg is 0.13% by weight, the existing ratio of Fe is 0.86% by weight, the mixing ratio of Mn is 0 .20% by weight, 0.00% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
- Comparative Example 7 The mixing ratio of Cu is 1.28% by weight, the mixing ratio of Si is 8.13% by weight, the mixing ratio of Mg is 0.22% by weight, the existing ratio of Fe is 0.90% by weight, the mixing ratio of Mn is 0 . 18% by weight, 0.07% by weight of Cr and the remainder being Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
- Comparative Example 8 The mixing ratio of Cu is 1.89% by weight, the mixing ratio of Si is 10.7% by weight, the mixing ratio of Mg is 0.23% by weight, the existing ratio of Fe is 0.87% by weight, the mixing ratio of Mn is 0 . 19% by weight, 0.07% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it is prepared to become ADC12 out of the range of the aluminum alloy element composition in the present invention
- the sample of the aluminum alloy die-cast was produced on the same conditions as Example 1. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 2.
- Comparative Example 9 0.00 wt% of Cu, 7.87 wt% of Si, 0.00 wt% of Mg, 0.29 wt% of Fe, and 0 of Mn .00% by weight, 0.37% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 2.
- Comparative Example 10 The mixing ratio of Cu is 1.87% by weight, the mixing ratio of Si is 8.15% by weight, the mixing ratio of Mg is 0.23% by weight, the existing ratio of Fe is 0.89% by weight, the mixing ratio of Mn is 0 .19% by weight, 0.07% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 2.
- the mechanical properties measured in the examples have tensile strength and elongation approximately equal to or higher than that of the ADC 12.
Abstract
Provided are: an aluminum alloy for a die cast, which is highly safe, rarely undergoes casting cracking and can have a reduced thickness in spite of a simple formulation thereof, has seizure resistance, fluidability and a property of being filled, enables an article to be produced with high shape flexibility, and has similar mechanical properties to those of ADC12; and an aluminum alloy die cast produced by die-casting the alloy. That is, provided are: an aluminum alloy for a die cast, characterized by comprising 0.20 to 1.50 wt% inclusive of Cu, 6.0 wt% or more and less than 10.0 wt% of Si, 0.09 wt% or less of Mg, 1.0 wt% or less of Fe, 0.45 wt% or less of Mn and 0.50 wt% or less of Cr, with the remainder made up by Al and unavoidable impurities; and an aluminum alloy die cast produced die-casting the alloy.
Description
本発明は、鋳造割れを低減させたダイカスト用アルミニウム合金および当該合金を利用したアルミニウム合金ダイカストに関する。
The present invention relates to an aluminum alloy for die casting with reduced casting cracks and an aluminum alloy die casting using the alloy.
アルミニウム合金は、軽量であると共に、優れた熱伝導性および高い耐蝕性などの諸特性から、自動車や産業機械、航空機、家庭電化製品その他各種分野において、その構成部品素材として広く使用されている。その一つとしてダイカスト用アルミニウム合金の分野があり、その代表的なものとして日本工業規格ＪＩＳ Ｈ５３０２にて規定されたＡｌ－Ｓｉ－Ｃｕ系ダイカスト用合金のＡＤＣ１２がある。このＡＤＣ１２は、鋳造(ダイカスト)の際における流動性や充填性が良いことから、自動車のキャブレター，シリンダーブロック，シリンダーヘッドカバーなどのカバー類やケース類等の用途、或いは自動車以外のダイカスト部品に多用されてきた。
Aluminum alloys are widely used as component materials in automobiles, industrial machinery, aircraft, home appliances, and various other fields because of their properties such as light weight and excellent thermal conductivity and high corrosion resistance. One of them is the field of aluminum alloys for die casting, and a representative example thereof is ADC12 of an alloy for Al—Si—Cu based die casting specified in Japanese Industrial Standard JIS H5302. The ADC 12 is widely used for applications such as covers and cases such as carburetors, cylinder blocks, and cylinder head covers of automobiles, or die casting parts other than automobiles because of its good fluidity and filling property at the time of casting (die casting) It has
このように、ＡＤＣ１２は広くダイカストに用いられているが、鋳造されるダイカストが薄肉である場合やその形状によっては、型開き時や製品押出し時に鋳造したダイカストが割れる現象、所謂「鋳造割れ」が起こることがある。この鋳造割れが発生すると、不良率が上がってコスト増につながったり、場合によっては、鋳造割れが発生しにくい製品形状に変更しなければならず、製品形状に制約が生じるようになると云う問題が有った。
Thus, ADC12 is widely used for die casting, but when the die cast to be cast is thin or depending on its shape, a phenomenon in which the die cast casted at the time of mold opening or product extrusion is broken, so-called "cast cracking" It can happen. If this casting crack occurs, the defect rate will increase, leading to an increase in cost, and in some cases, it will be necessary to change the product shape so that casting cracks are unlikely to occur, which results in a problem that the product shape will be restricted. There was.
そこで、アルミニウム合金溶湯の流動性を更に改善して、より薄肉のアルミニウム合金ダイカストを製造できるようにする技術として、特許文献１には、Ａｌ－Ｓｉ系のアルミニウム合金にＢｅ(ベリリウム)を０．０００５～０．０１％配合する技術が開示されている。
Therefore, as a technology for further improving the flowability of the aluminum alloy molten metal so as to be able to manufacture a thinner aluminum alloy die cast, Patent Document 1 discloses Be (beryllium) in the Al-Si based aluminum alloy as 0. A technology for blending 0005 to 0.01% is disclosed.
この技術によれば、アルミニウム合金溶湯表面でのアルミニウム酸化被膜の生成が抑制され、アルミニウム合金溶湯の流動性が改善される結果、薄肉ダイカストの製造を容易にすることができる。しかしながら、毒性の高いＢｅを用いるこの技術では、ダイカスト用アルミニウム合金の製造時における作業者の安全確保のためのコストや労力が必要であることから、薄肉ダイカストの製造が可能なアルミニウム合金を効率よく経済的に製造するのが困難であると云う問題が有った。
According to this technique, the formation of the aluminum oxide film on the surface of the molten aluminum alloy is suppressed, and the fluidity of the molten aluminum alloy is improved. As a result, the thin die casting can be easily manufactured. However, in this technology using highly toxic Be, cost and labor are required to ensure the safety of workers when manufacturing aluminum alloys for die-casting, so aluminum alloys capable of manufacturing thin-walled die-casts can be efficiently used. There is a problem that it is difficult to manufacture economically.
それゆえに、この発明の主たる課題は、安全性の高い簡単な処方で有りながら鋳造割れが起こりにくく薄肉化が可能であると同時に、耐焼付き性や流動性・充填性を兼ね備えたダイカスト用アルミニウム合金であって、製品形状の自由度が高くＡＤＣ１２と同等の機械的特性を有するダイカスト用アルミニウム合金と、当該合金でダイカストされたアルミニウム合金ダイカストとを提供することである。
Therefore, the main object of the present invention is an aluminum alloy for die-casting having seizing resistance, flowability and filling property while being hard to cause casting cracks and capable of thinning while being a highly safe and easy formulation. It is an object of the present invention to provide an aluminum alloy for die-casting which has a high degree of freedom in product shape and mechanical characteristics equivalent to those of ADC 12 and an aluminum alloy die-cast made of the alloy.
本発明における第１の発明は、「Ｃｕ：０．２０重量％以上で且つ１．５０重量％以下、Ｓｉ：６．０重量％以上で且つ１０．０重量％未満、Ｍｇ：０．０９重量％以下、Ｆｅ：１．０重量％以下、Ｍｎ：０．４５重量％以下、Ｃｒ：０．５０重量％以下を含有し、残部がＡｌと不可避不純物とからなる」ことを特徴とするダイカスト用アルミニウム合金である。
According to the first aspect of the present invention, “Cu: 0.20% by weight or more and 1.50% by weight or less, Si: 6.0% by weight or more and less than 10.0% by weight, Mg: 0.09% by weight %, Fe: 1.0% by weight or less, Mn: 0.45% by weight or less, Cr: 0.50% by weight or less, and the balance consists of Al and unavoidable impurities "for die casting It is an aluminum alloy.
この発明では、鋳造割れに最も大きな影響を与えると考えられるＭｇの配合割合を０．０９重量％以下に抑えているので、鋳造割れが起こりにくくなっている一方で、Ｍｇ低減によって低下する強度を、０．２０重量％以上で且つ１．５０重量％以下のＣｕを添加することで補っている。また、Ｓｉを６．０重量％以上で且つ１０．０重量％未満配合しているので鋳造割れの発生を抑えつつ、アルミニウム合金溶湯の流動性を向上させることができ、Ｆｅを上限１．０重量％、Ｍｎを上限０．４５重量％、Ｃｒを上限０．５０重量％添加することで、適正な溶解温度を保ちつつ、焼付きを防止することができるようになる。
In the present invention, since the compounding ratio of Mg which is considered to have the largest influence on the casting cracking is suppressed to 0.09 wt% or less, the casting cracking is less likely to occur, while the strength decreased by the Mg reduction is It compensates by adding 0.20 weight% or more and 1.50 weight% or less of Cu. In addition, since Si is incorporated in an amount of 6.0% by weight or more and less than 10.0% by weight, the fluidity of the molten aluminum alloy can be improved while suppressing the occurrence of casting cracks, and the upper limit of Fe is 1.0. By adding wt%, Mn at an upper limit of 0.45 wt% and Cr at an upper limit of 0.50 wt%, seizure can be prevented while maintaining an appropriate melting temperature.
以上のように、本発明では、６種類の元素成分を所定の割合で配合するだけで、鋳造割れが起こりにくく、同時に耐焼付き性や流動性・充填性を兼ね備えたダイカスト用アルミニウム合金のインゴットを安全且つ簡便に製造することができる。
As described above, according to the present invention, an ingot of an aluminum alloy for die-casting which is resistant to casting cracking and at the same time has seizure resistance, fluidity and filling property only by blending six kinds of elemental components in a predetermined ratio. It can be manufactured safely and easily.
また、本発明における第２の発明は、上記第１の発明に記載のダイカスト用アルミニウム合金でダイカストされたことを特徴とするアルミニウム合金ダイカストである。
A second invention of the present invention is an aluminum alloy die cast made by die casting of the aluminum alloy for die casting according to the first invention.
本発明における第１の発明のダイカスト用アルミニウム合金でダイカストされたアルミニウム合金ダイカストは、鋳造割れが生じにくいため、鋳造性よく薄物を量産できると共に、ＡＤＣ１２とほぼ同等の機械的特性を有することから、例えば自動車部品、光学部品、産業機械部品、家庭用器具など幅広い用途に適用することができる。
The aluminum alloy die cast by the die casting aluminum alloy according to the first invention of the present invention is less likely to cause casting cracks, so that thin articles can be mass-produced with good castability, and it has mechanical properties substantially equivalent to that of ADC12. For example, it can be applied to a wide range of applications such as automobile parts, optical parts, industrial machine parts, household appliances and the like.
本発明によれば、安全性の高い簡単な処方で有りながら鋳造割れが起こりにくく薄肉化が可能であると同時に、耐焼付き性や流動性・充填性を兼ね備えたダイカスト用アルミニウム合金であって、製品形状の自由度が高くＡＤＣ１２と同等の機械的特性を有するダイカスト用アルミニウム合金と、当該合金でダイカストされたアルミニウム合金ダイカストとを提供することができる。
According to the present invention, it is a highly safe and easy-to-use aluminum alloy for die-casting which has both seizure resistance and fluidity / fillability while being difficult to cause casting cracks and capable of being thinned while being a simple formulation. It is possible to provide an aluminum alloy for die casting having a high degree of freedom in product shape and mechanical characteristics equivalent to that of the ADC 12, and an aluminum alloy die cast from the alloy.
以下、本発明の実施の形態について具体例を示しながら詳述する。
Hereinafter, embodiments of the present invention will be described in detail by way of specific examples.
本発明のダイカスト用アルミニウム合金(以下、単に「アルミニウム合金」とも云う。)は、主として０．２０重量％以上で且つ１．５０重量％以下のＣｕ(銅)，６．０重量％以上で且つ１０．０重量％未満のＳｉ(シリコン；ケイ素)，０．０９重量％以下のＭｇ(マグネシウム)，１．０重量％以下のＦｅ(鉄)，０．４５重量％以下のＭｎ(マンガン)及び０．５０重量％以下のＣｒ(クロム)を含有し、残部がＡｌ(アルミニウム)と不可避不純物とで構成されている。以下、各元素の特性について説明する。
The aluminum alloy for die casting according to the present invention (hereinafter, also simply referred to as "aluminum alloy") is mainly 0.20 wt% or more and 1.50 wt% or less of Cu (copper), 6.0 wt% or more Less than 10.0 wt% Si (silicon; silicon), 0.09 wt% or less Mg (magnesium), 1.0 wt% or less Fe (iron), 0.45 wt% or less Mn (manganese) and It contains 0.50% by weight or less of Cr (chromium), and the balance is composed of Al (aluminum) and unavoidable impurities. The characteristics of each element will be described below.
Ｃｕ(銅)は、アルミニウム合金の機械的強度や硬度を向上させるためのものである。後述するように、鋳造割れに対して最も大きな影響があるＭｇの配合割合を低減させると、アルミニウム合金の強度が低下するようになるが、この低下した強度を補うのがＣｕの役割である。
Cu (copper) is for improving the mechanical strength and hardness of the aluminum alloy. As described later, when the blending ratio of Mg, which has the largest influence on the casting cracking, is reduced, the strength of the aluminum alloy is reduced. The role of Cu is to compensate for the reduced strength.
アルミニウム合金全体の重量に対するＣｕの配合割合は、上述したように０．２０重量％以上で且つ１．５０重量％以下の範囲であることが好ましい。Ｃｕの配合割合が０．２０重量％未満の場合には、Ｃｕの配合による強度改善効果が十分に認められず、逆にＣｕの配合割合が１．５０重量％より多い場合には、強度改善効果は顕著なものとなるが、鋳造割れが懸念されるようになるからである。
As described above, the blending ratio of Cu with respect to the weight of the entire aluminum alloy is preferably in the range of 0.20 wt% or more and 1.50 wt% or less. When the blending ratio of Cu is less than 0.20 wt%, the strength improvement effect by the blending of Cu is not sufficiently recognized, and conversely, when the blending ratio of Cu is more than 1.50 wt%, the strength improves Although the effect is remarkable, it is because casting cracks become a concern.
Ｓｉ(シリコン；ケイ素)は、アルミニウム合金を溶融して加圧鋳造する際に、その流動性や金型への充填性を向上させるためのものである。
Si (silicon; silicon) is for improving the flowability and the filling property to the mold when the aluminum alloy is melted and pressure-casted.
アルミニウム合金全体の重量に対するＳｉの配合割合は、上述したように６．０重量％以上で且つ１０．０重量％未満の範囲であることが好ましい。Ｓｉの配合割合が６．０重量％未満の場合には、アルミニウム合金の溶融温度および鋳造温度が高くなると共に、アルミニウム合金を溶融した際の流動性が低下するためダイカスト時に十分な湯流れ性が確保できず、逆に、Ｓｉの配合割合が１０．０重量％以上の場合には、アルミニウム合金の溶融時の流動性は十分なものとなるが、鋳造割れが起き易くなるからである。
It is preferable that the compounding ratio of Si with respect to the weight of the whole aluminum alloy is in the range of 6.0% by weight or more and less than 10.0% by weight as described above. When the blending ratio of Si is less than 6.0% by weight, the melting temperature and the casting temperature of the aluminum alloy become high, and the fluidity at the time of melting the aluminum alloy is lowered, so that the fluidity is sufficient at the time of die casting On the contrary, when the blending ratio of Si is 10.0% by weight or more, the fluidity at the time of melting of the aluminum alloy is sufficient, but casting cracks easily occur.
Ｍｇ(マグネシウム)は、主としてアルミニウム合金中のＡｌ母材に固溶した状態又はＭｇ２Ｓｉとして存在し、アルミニウム合金に耐力および引張強さを付与する一方で、鋳造割れに対して最も大きな影響を及ぼす成分である。
Mg (magnesium) is mainly present in the form of a solid solution in an Al base material in an aluminum alloy or as Mg 2 Si and imparts a yield strength and a tensile strength to the aluminum alloy while having the greatest effect on casting cracks. It is an ingredient to exert.
アルミニウム合金全体の重量に対するＭｇの配合割合は、上述したように０．０９重量％以下の範囲であることが好ましい。Ｍｇの配合割合が０．０９重量％より多い場合には、急激に鋳造割れが発生し易くなるからである。
It is preferable that the compounding ratio of Mg with respect to the weight of the whole aluminum alloy is 0.09 weight% or less range as mentioned above. If the blending ratio of Mg is more than 0.09% by weight, the casting cracks are likely to occur rapidly.
Ｆｅ(鉄)は、ダイカスト時の焼付き防止効果を有することが知られている。しかしながら、このＦｅは、Ａｌ-Ｓｉ-Ｆｅからなる針状晶を晶出し、アルミニウム合金の靱性を低下させると共に、大量に添加すると適温での溶解を困難にする。このため、本発明では、Ｆｅの含有量を、アルミニウム合金全体の重量に対して１．０重量％以下に抑えている。
Fe (iron) is known to have a seizure prevention effect at the time of die casting. However, this Fe crystallizes needle-like crystals consisting of Al-Si-Fe, and reduces the toughness of the aluminum alloy, and when added in large amounts, makes it difficult to melt at an appropriate temperature. Therefore, in the present invention, the content of Fe is suppressed to 1.0% by weight or less based on the weight of the entire aluminum alloy.
Ｍｎ(マンガン)は、上述したＦｅと同様に、主としてダイカスト時におけるアルミニウム合金と金型との焼付きを防止するためのものである。このＭｎもＦｅと同様に、大量に添加すると適温での溶解が困難になることから、本発明では、Ｍｎの含有量を、アルミニウム合金全体の重量に対して０.４５重量％以下に抑えている。
Mn (manganese) is mainly for preventing seizing between the aluminum alloy and the mold at the time of die casting, similarly to Fe described above. Similar to Fe, too much Mn makes this solution difficult to melt at an appropriate temperature. Therefore, in the present invention, the Mn content is suppressed to 0.45% by weight or less based on the weight of the entire aluminum alloy. There is.
なお、本発明のアルミニウム合金では、上述のようにＭｎの配合割合を合金全体の重量に対して最大で０．４５重量％まで許容しているので、アルミ缶回収材料などＭｎ含有量が高いＡｌ－Ｍｎ系スクラップを合金原料の一部として使用することができる。
In addition, in the aluminum alloy of the present invention, as described above, since the blending ratio of Mn is allowed up to 0.45% by weight with respect to the weight of the entire alloy, Al having a high Mn content such as aluminum can recovery material Mn-based scrap can be used as part of the alloy material.
Ｃｒ(クロム)は、主としてアルミニウム合金が溶融している時には溶融状態で、また、固体の時にはＡｌ相に固溶した状態あるいはＣｒ系化合物として晶出した状態で存在し、上述したＦｅ及びＭｎと同様に、ダイカスト時におけるアルミニウム合金と金型との焼付きを防止するためのものである。このＣｒもＦｅ及びＭｎと同様に、大量に添加すると適温での溶解が困難になることから、本発明では、Ｃｒの含有量を、アルミニウム合金全体の重量に対して０.５０重量％以下に抑えている。
Cr (chromium) is present mainly in the molten state when the aluminum alloy is in a molten state, and in the solid state it exists in a solid solution state in the Al phase or in a crystallized state as a Cr compound, Similarly, it is for preventing seizing between the aluminum alloy and the die at the time of die casting. Similarly to Fe and Mn, Cr also makes it difficult to melt at a suitable temperature if added in large amounts, so in the present invention, the content of Cr is 0.50% by weight or less based on the weight of the entire aluminum alloy. I'm holding back.
ここで、金型への焼付きを防止してより一層好適なダイカスト適性を得るためには、Ｆｅ，Ｍｎ，Ｃｒの配合割合の合計が、合金全体の重量に対して０．４０重量％以上で且つ１．９５重量％以下の範囲となるようにするのが好ましく、より好ましくは、０．５０重量％以上で且つ１．９５重量％以下の範囲である。
Here, in order to prevent seizing to the mold and obtain more suitable die-casting suitability, the total of the blending ratio of Fe, Mn, and Cr is 0.40% by weight or more based on the weight of the entire alloy. And preferably in the range of 1.95% by weight or less, more preferably in the range of 0.50% by weight or more and 1.95% by weight or less.
以上の配合割合に従って、Ｃｕ，Ｓｉ，Ｍｇ，Ｆｅ，Ｍｎ及びＣｒの配合割合を調整すると、安全性の高い簡単な処方で有りながら鋳造割れが起こりにくく薄肉化が可能であると同時に、耐焼付き性や流動性・充填性を兼ね備えたダイカスト用アルミニウム合金地金を得ることができる。
If the blending ratio of Cu, Si, Mg, Fe, Mn and Cr is adjusted according to the above blending ratio, although it is a simple and highly safe formulation, casting cracking is unlikely to occur and thinning is possible, and at the same time seizure resistance It is possible to obtain an aluminum alloy base metal for die-casting that has both the properties, flowability and filling properties.
なお、上述した各元素成分のほかに、Ｎａ(ナトリウム)，Ｓｒ(ストロンチウム)，Ｃａ(カルシウム)およびＳｂ(アンチモン)から選ばれる少なくとも１種を改良処理材として添加するようにしてもよい。このような改良処理材を添加することによって共晶Ｓｉの粒子を細かくすることができ、アルミニウム合金の靱性や強度をより一層向上させることができる。
In addition to the above-described respective element components, at least one selected from Na (sodium), Sr (strontium), Ca (calcium) and Sb (antimony) may be added as the improvement treatment material. By adding such an improvement treatment material, particles of eutectic Si can be made finer, and the toughness and strength of the aluminum alloy can be further improved.
また、上記改良処理材に代えて、或いは改良処理材と共に、Ｔｉ（チタン）およびＢ（硼素）の少なくとも一方を添加するようにしてもよい。このようにＴｉおよびＢの少なくとも一方を添加することによってアルミニウム合金の結晶粒が微細化され、当該合金の伸びを向上させることができる。なお、かかる効果は、特にＳｉ量が少ない場合に顕著となる。
Further, at least one of Ti (titanium) and B (boron) may be added in place of the above-mentioned improved treatment material or together with the improved treatment material. Thus, by adding at least one of Ti and B, the crystal grains of the aluminum alloy can be refined, and the elongation of the alloy can be improved. Such an effect is remarkable particularly when the amount of Si is small.
本発明のダイカスト用アルミニウム合金を製造する際には、まず、Ａｌ，Ｃｕ，Ｓｉ，Ｍｇ，Ｆｅ，Ｍｎ及びＣｒの各元素成分が上述した所定の割合となるように配合した原料を準備する。続いて、この原料を前炉付溶解炉や密閉溶解炉などの溶解炉に投入し、これらを溶解させる。溶解させた原料すなわちアルミニウム合金の溶湯は、必要に応じて脱水素処理および脱介在物処理などの精製処理が施される。そして、精製された溶湯を所定の鋳型などに流し込み、固化させることによって、アルミニウム合金の溶湯を合金地金インゴットなどに成形する。
When manufacturing the aluminum alloy for die casting of the present invention, first, raw materials are prepared in which the respective elemental components of Al, Cu, Si, Mg, Fe, Mn, and Cr have the above-described predetermined ratio. Subsequently, the raw material is put into a melting furnace such as a forging furnace-containing melting furnace or a closed melting furnace to melt these materials. The molten raw material thus melted, that is, the molten metal of the aluminum alloy, is subjected to a purification treatment such as dehydrogenation treatment and removal treatment, if necessary. Then, the refined molten metal is poured into a predetermined mold or the like and solidified to form a molten metal of an aluminum alloy into an alloy base metal ingot or the like.
また、本発明のダイカスト用アルミニウム合金を用いてアルミニウム合金ダイカストを鋳造した後、必要に応じて溶体化処理及び時効処理などが施される。このようにアルミニウム合金ダイカストに溶体化処理および時効処理などを施すことによってアルミニウム合金鋳物の機械的特性を改良することができる。
In addition, after casting an aluminum alloy die cast using the aluminum alloy for die casting of the present invention, solution treatment, aging treatment and the like are performed as needed. Thus, the mechanical properties of the aluminum alloy casting can be improved by subjecting the aluminum alloy die cast to solution treatment, aging treatment and the like.
以下に、実施例を挙げて本発明を具体的に説明するが、本発明は実施例に限定されるものではない。なお、所定の実施例および比較例における各機械的特性(引張強さ，伸び，０．２％耐力)は、（株）島津製作所社製の万能試験機(ＡＧ－ＩＳ １００ｋＮ)で測定した。
Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to the examples. The mechanical properties (tensile strength, elongation, 0.2% proof stress) in predetermined Examples and Comparative Examples were measured by a universal tester (AG-IS 100 kN) manufactured by Shimadzu Corporation.
[実施例１]
Ｃｕの配合割合を０．２１重量％，Ｓｉの配合割合を７．８８重量％，Ｍｇの配合割合を０．０４重量％，Ｆｅの存在割合を０．２２重量％，Ｍｎの配合割合を０．０４重量％，Ｃｒの配合割合を０．３６重量％，そして残部をＡｌ及び不可避不純物とすることによって、本発明におけるダイカスト用アルミニウム合金の元素組成の範囲内となるように配合した溶湯を調製した。 Example 1
0.21% by weight of Cu, 7.88% by weight of Si, 0.04% by weight of Mg, 0.22% by weight of Fe, and 0% of Mn .04% by weight, 0.36% by weight of Cr and the balance being Al and unavoidable impurities, a molten metal is prepared to be within the range of the elemental composition of the aluminum alloy for die casting in the present invention did.
Ｃｕの配合割合を０．２１重量％，Ｓｉの配合割合を７．８８重量％，Ｍｇの配合割合を０．０４重量％，Ｆｅの存在割合を０．２２重量％，Ｍｎの配合割合を０．０４重量％，Ｃｒの配合割合を０．３６重量％，そして残部をＡｌ及び不可避不純物とすることによって、本発明におけるダイカスト用アルミニウム合金の元素組成の範囲内となるように配合した溶湯を調製した。 Example 1
0.21% by weight of Cu, 7.88% by weight of Si, 0.04% by weight of Mg, 0.22% by weight of Fe, and 0% of Mn .04% by weight, 0.36% by weight of Cr and the balance being Al and unavoidable impurities, a molten metal is prepared to be within the range of the elemental composition of the aluminum alloy for die casting in the present invention did.
続いて、この溶湯を、型締力２５０トンの通常のダイカストマシン(東芝機械(株)社製ＤＣ２５０ＪＭＴ)を用いて以下の条件でダイカストし、鋳造割れの有無を測定した。
Subsequently, this molten metal was die-casted under the following conditions using a normal die-casting machine (DC 250 JMT manufactured by Toshiba Machine Co., Ltd.) having a clamping force of 250 tons, and the presence or absence of casting cracks was measured.
すなわち、厚さ０．５ｍｍ及び０．７ｍｍの短冊状の板材(幅２０ｍｍ×長さ１５０ｍｍ)を二個取りする金型であって、ゲート部分が鋳造割れを起こし易く、ＪＩＳ ＡＤＣ１２を用いた場合には１００％鋳造割れが発生する形状の金型を用いてダイカストを行った。その際、鋳造温度を７２０℃、射出速度を１．５ｍ／秒（ゲート速度１５８ｍ／秒）、鋳造圧力を５０ＭＰａ、ダイタイマ(高速射出開始時から金型を開くまでの時間)を３秒に設定した。そして、３０ショット中、ゲート部分に鋳造割れが発生した個数をカウントし、鋳造割れ発生率(％)を算出した。得られた結果を表１に示す。
That is, it is a mold which takes two pieces of strip-like plate material (width 20 mm × length 150 mm) with a thickness of 0.5 mm and 0.7 mm, and the gate part is prone to casting cracking, and JIS ADC 12 is used. The die casting was performed using a mold having a shape that causes 100% casting cracking. At that time, set the casting temperature to 720 ° C, the injection speed to 1.5 m / s (gate speed 158 m / s), the casting pressure to 50 MPa, and the die timer (time from the start of high-speed injection to opening the mold) to 3 seconds did. Then, the number of casting cracks occurring in the gate portion was counted during 30 shots, and the casting crack occurrence rate (%) was calculated. The obtained results are shown in Table 1.
[実施例２]
Ｃｕの配合割合を０．９２重量％，Ｓｉの配合割合を８．２１重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．１４重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．３７重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。なお、機械的特性については厚さ０．７ｍｍの板材を用いて測定した(以下、同じ。)。 Example 2
0.92 wt% of Cu, 8.21 wt% of Si, 0.00 wt% of Mg, 0.14 wt% of Fe and 0 wt% of Mn A sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that .00 wt% and the blending ratio of Cr was 0.37 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1. In addition, about the mechanical characteristic, it measured using the board | plate material of thickness 0.7 mm (following, the same.).
Ｃｕの配合割合を０．９２重量％，Ｓｉの配合割合を８．２１重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．１４重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．３７重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。なお、機械的特性については厚さ０．７ｍｍの板材を用いて測定した(以下、同じ。)。 Example 2
0.92 wt% of Cu, 8.21 wt% of Si, 0.00 wt% of Mg, 0.14 wt% of Fe and 0 wt% of Mn A sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that .00 wt% and the blending ratio of Cr was 0.37 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1. In addition, about the mechanical characteristic, it measured using the board | plate material of thickness 0.7 mm (following, the same.).
[実施例３]
Ｃｕの配合割合を０．７０重量％，Ｓｉの配合割合を７．０２重量％，Ｍｇの配合割合を０．０１重量％，Ｆｅの存在割合を０．８６重量％，Ｍｎの配合割合を０．２１重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 3]
0.70% by weight of Cu, 7.02% by weight of Si, 0.01% by weight of Mg, 0.86% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 21 wt% and the blending ratio of Cr was 0.00 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
Ｃｕの配合割合を０．７０重量％，Ｓｉの配合割合を７．０２重量％，Ｍｇの配合割合を０．０１重量％，Ｆｅの存在割合を０．８６重量％，Ｍｎの配合割合を０．２１重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 3]
0.70% by weight of Cu, 7.02% by weight of Si, 0.01% by weight of Mg, 0.86% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 21 wt% and the blending ratio of Cr was 0.00 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
[実施例４]
Ｃｕの配合割合を０．７２重量％，Ｓｉの配合割合を７．７５重量％，Ｍｇの配合割合を０．０１重量％，Ｆｅの存在割合を０．８２重量％，Ｍｎの配合割合を０．４２重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表１に示す。 Example 4
The blending ratio of Cu is 0.72 wt%, the blending ratio of Si is 7.75 wt%, the blending ratio of Mg is 0.01 wt%, the existing ratio of Fe is 0.82 wt%, the blending ratio of Mn is 0 A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 42 wt% and the blending ratio of Cr was 0.00 wt%. The cast cracking incidence (%) of the obtained sample is shown in Table 1.
Ｃｕの配合割合を０．７２重量％，Ｓｉの配合割合を７．７５重量％，Ｍｇの配合割合を０．０１重量％，Ｆｅの存在割合を０．８２重量％，Ｍｎの配合割合を０．４２重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表１に示す。 Example 4
The blending ratio of Cu is 0.72 wt%, the blending ratio of Si is 7.75 wt%, the blending ratio of Mg is 0.01 wt%, the existing ratio of Fe is 0.82 wt%, the blending ratio of Mn is 0 A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 42 wt% and the blending ratio of Cr was 0.00 wt%. The cast cracking incidence (%) of the obtained sample is shown in Table 1.
[実施例５]
Ｃｕの配合割合を１．０３重量％，Ｓｉの配合割合を６．１５重量％，Ｍｇの配合割合を０．０１重量％，Ｆｅの存在割合を０．８４重量％，Ｍｎの配合割合を０．３４重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表１に示す。 [Example 5]
1.03% by weight of Cu, 6.15% by weight of Si, 0.01% by weight of Mg, 0.84% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that 34 wt% and the blending ratio of Cr was 0.00 wt%. The cast cracking incidence (%) of the obtained sample is shown in Table 1.
Ｃｕの配合割合を１．０３重量％，Ｓｉの配合割合を６．１５重量％，Ｍｇの配合割合を０．０１重量％，Ｆｅの存在割合を０．８４重量％，Ｍｎの配合割合を０．３４重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表１に示す。 [Example 5]
1.03% by weight of Cu, 6.15% by weight of Si, 0.01% by weight of Mg, 0.84% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that 34 wt% and the blending ratio of Cr was 0.00 wt%. The cast cracking incidence (%) of the obtained sample is shown in Table 1.
[実施例６]
Ｃｕの配合割合を１．０５重量％，Ｓｉの配合割合を６．９１重量％，Ｍｇの配合割合を０．０１重量％，Ｆｅの存在割合を０．８６重量％，Ｍｎの配合割合を０．２１重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 6]
1.05% by weight of Cu, 6.91% by weight of Si, 0.01% by weight of Mg, 0.86% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 21 wt% and the blending ratio of Cr was 0.00 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
Ｃｕの配合割合を１．０５重量％，Ｓｉの配合割合を６．９１重量％，Ｍｇの配合割合を０．０１重量％，Ｆｅの存在割合を０．８６重量％，Ｍｎの配合割合を０．２１重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 6]
1.05% by weight of Cu, 6.91% by weight of Si, 0.01% by weight of Mg, 0.86% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 21 wt% and the blending ratio of Cr was 0.00 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
[実施例７]
Ｃｕの配合割合を１．１１重量％，Ｓｉの配合割合を６．９２重量％，Ｍｇの配合割合を０．０４重量％，Ｆｅの存在割合を０．８４重量％，Ｍｎの配合割合を０．２０重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表１に示す。 [Example 7]
The blending ratio of Cu is 1.11 wt%, the blending ratio of Si is 6.92 wt%, the blending ratio of Mg is 0.04 wt%, the existing ratio of Fe is 0.84 wt%, the blending ratio of Mn is 0 A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that the blending ratio of Cr was set to 0.00 wt%, and 20 wt%. The cast cracking incidence (%) of the obtained sample is shown in Table 1.
Ｃｕの配合割合を１．１１重量％，Ｓｉの配合割合を６．９２重量％，Ｍｇの配合割合を０．０４重量％，Ｆｅの存在割合を０．８４重量％，Ｍｎの配合割合を０．２０重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表１に示す。 [Example 7]
The blending ratio of Cu is 1.11 wt%, the blending ratio of Si is 6.92 wt%, the blending ratio of Mg is 0.04 wt%, the existing ratio of Fe is 0.84 wt%, the blending ratio of Mn is 0 A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that the blending ratio of Cr was set to 0.00 wt%, and 20 wt%. The cast cracking incidence (%) of the obtained sample is shown in Table 1.
[実施例８]
Ｃｕの配合割合を１．１３重量％，Ｓｉの配合割合を６．９７重量％，Ｍｇの配合割合を０．０７重量％，Ｆｅの存在割合を０．８５重量％，Ｍｎの配合割合を０．２０重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 8]
The blending ratio of Cu is 1.13 wt%, the blending ratio of Si is 6.97 wt%, the blending ratio of Mg is 0.07 wt%, the existing ratio of Fe is 0.85 wt%, the blending ratio of Mn is 0 A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that the blending ratio of Cr was set to 0.00 wt%, and 20 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
Ｃｕの配合割合を１．１３重量％，Ｓｉの配合割合を６．９７重量％，Ｍｇの配合割合を０．０７重量％，Ｆｅの存在割合を０．８５重量％，Ｍｎの配合割合を０．２０重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 8]
The blending ratio of Cu is 1.13 wt%, the blending ratio of Si is 6.97 wt%, the blending ratio of Mg is 0.07 wt%, the existing ratio of Fe is 0.85 wt%, the blending ratio of Mn is 0 A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that the blending ratio of Cr was set to 0.00 wt%, and 20 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
[実施例９]
Ｃｕの配合割合を１．１３重量％，Ｓｉの配合割合を６．９９重量％，Ｍｇの配合割合を０．０５重量％，Ｆｅの存在割合を０．８５重量％，Ｍｎの配合割合を０．２０重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表１に示す。 [Example 9]
The blending ratio of Cu is 1.13 wt%, the blending ratio of Si is 6.99 wt%, the blending ratio of Mg is 0.05 wt%, the existing ratio of Fe is 0.85 wt%, the blending ratio of Mn is 0 A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that the blending ratio of Cr was set to 0.00 wt%, and 20 wt%. The cast cracking incidence (%) of the obtained sample is shown in Table 1.
Ｃｕの配合割合を１．１３重量％，Ｓｉの配合割合を６．９９重量％，Ｍｇの配合割合を０．０５重量％，Ｆｅの存在割合を０．８５重量％，Ｍｎの配合割合を０．２０重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表１に示す。 [Example 9]
The blending ratio of Cu is 1.13 wt%, the blending ratio of Si is 6.99 wt%, the blending ratio of Mg is 0.05 wt%, the existing ratio of Fe is 0.85 wt%, the blending ratio of Mn is 0 A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that the blending ratio of Cr was set to 0.00 wt%, and 20 wt%. The cast cracking incidence (%) of the obtained sample is shown in Table 1.
[実施例１０]
Ｃｕの配合割合を１．３２重量％，Ｓｉの配合割合を７．７５重量％，Ｍｇの配合割合を０．０１重量％，Ｆｅの存在割合を０．８２重量％，Ｍｎの配合割合を０．４３重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 10]
The mixing ratio of Cu is 1.32% by weight, the mixing ratio of Si is 7.75% by weight, the mixing ratio of Mg is 0.01% by weight, the existing ratio of Fe is 0.82% by weight, the mixing ratio of Mn is 0 A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 43 wt% and the blending ratio of Cr was 0.00 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
Ｃｕの配合割合を１．３２重量％，Ｓｉの配合割合を７．７５重量％，Ｍｇの配合割合を０．０１重量％，Ｆｅの存在割合を０．８２重量％，Ｍｎの配合割合を０．４３重量％，Ｃｒの配合割合を０．００重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 10]
The mixing ratio of Cu is 1.32% by weight, the mixing ratio of Si is 7.75% by weight, the mixing ratio of Mg is 0.01% by weight, the existing ratio of Fe is 0.82% by weight, the mixing ratio of Mn is 0 A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that 43 wt% and the blending ratio of Cr was 0.00 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
[実施例１１]
Ｃｕの配合割合を０．５３重量％，Ｓｉの配合割合を７．９１重量％，Ｍｇの配合割合を０．０９重量％，Ｆｅの存在割合を０．３９重量％，Ｍｎの配合割合を０．０９重量％，Ｃｒの配合割合を０．３４重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 11]
0.53% by weight of Cu, 7.91% by weight of Si, 0.09% by weight of Mg, 0.39% by weight of Fe, 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that .09 wt% and the blending ratio of Cr was 0.34 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
Ｃｕの配合割合を０．５３重量％，Ｓｉの配合割合を７．９１重量％，Ｍｇの配合割合を０．０９重量％，Ｆｅの存在割合を０．３９重量％，Ｍｎの配合割合を０．０９重量％，Ｃｒの配合割合を０．３４重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 11]
0.53% by weight of Cu, 7.91% by weight of Si, 0.09% by weight of Mg, 0.39% by weight of Fe, 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that .09 wt% and the blending ratio of Cr was 0.34 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
[実施例１２]
Ｃｕの配合割合を０．５４重量％，Ｓｉの配合割合を９．９４重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．１１重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．３０重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 12]
0.54% by weight of Cu, 9.94% by weight of Si, 0.00% by weight of Mg, 0.11% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that .00 wt% and the blending ratio of Cr was 0.30 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
Ｃｕの配合割合を０．５４重量％，Ｓｉの配合割合を９．９４重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．１１重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．３０重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 12]
0.54% by weight of Cu, 9.94% by weight of Si, 0.00% by weight of Mg, 0.11% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that .00 wt% and the blending ratio of Cr was 0.30 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
[実施例１３]
Ｃｕの配合割合を０．５４重量％，Ｓｉの配合割合を９．９８重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．２８重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．３０重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 13]
0.54% by weight of Cu, 9.98% by weight of Si, 0.00% by weight of Mg, 0.28% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that .00 wt% and the blending ratio of Cr was 0.30 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
Ｃｕの配合割合を０．５４重量％，Ｓｉの配合割合を９．９８重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．２８重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．３０重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 13]
0.54% by weight of Cu, 9.98% by weight of Si, 0.00% by weight of Mg, 0.28% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as Example 1 except that .00 wt% and the blending ratio of Cr was 0.30 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
[実施例１４]
Ｃｕの配合割合を０．５４重量％，Ｓｉの配合割合を９．９８重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．４４重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．２９重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 Example 14
0.54% by weight of Cu, 9.98% by weight of Si, 0.00% by weight of Mg, 0.44% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that .00 wt% and the blending ratio of Cr was 0.29 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
Ｃｕの配合割合を０．５４重量％，Ｓｉの配合割合を９．９８重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．４４重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．２９重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 Example 14
0.54% by weight of Cu, 9.98% by weight of Si, 0.00% by weight of Mg, 0.44% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that .00 wt% and the blending ratio of Cr was 0.29 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
[実施例１５]
Ｃｕの配合割合を０．５１重量％，Ｓｉの配合割合を７．５５重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．４５重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．３３重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 15]
0.51% by weight of Cu, 7.55% by weight of Si, 0.00% by weight of Mg, 0.45% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that .00 wt% and the blending ratio of Cr was 0.33 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
Ｃｕの配合割合を０．５１重量％，Ｓｉの配合割合を７．５５重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．４５重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．３３重量％とした以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表１に示す。 [Example 15]
0.51% by weight of Cu, 7.55% by weight of Si, 0.00% by weight of Mg, 0.45% by weight of Fe, and 0% of Mn A sample of aluminum alloy die casting was produced under the same conditions as in Example 1 except that .00 wt% and the blending ratio of Cr was 0.33 wt%. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 1.
[比較例１]
Ｃｕの配合割合を０．５３重量％，Ｓｉの配合割合を１０．０重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．６８重量％，Ｍｎの配合割合を０．０１重量％，Ｃｒの配合割合を０．３０重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 1
The mixing ratio of Cu is 0.53% by weight, the mixing ratio of Si is 10.0% by weight, the mixing ratio of Mg is 0.00% by weight, the existing ratio of Fe is 0.68% by weight, the mixing ratio of Mn is 0 .01% by weight, 0.30% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
Ｃｕの配合割合を０．５３重量％，Ｓｉの配合割合を１０．０重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．６８重量％，Ｍｎの配合割合を０．０１重量％，Ｃｒの配合割合を０．３０重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 1
The mixing ratio of Cu is 0.53% by weight, the mixing ratio of Si is 10.0% by weight, the mixing ratio of Mg is 0.00% by weight, the existing ratio of Fe is 0.68% by weight, the mixing ratio of Mn is 0 .01% by weight, 0.30% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
[比較例２]
Ｃｕの配合割合を０．００重量％，Ｓｉの配合割合を１２．６重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．１２重量％，Ｍｎの配合割合を０．０１重量％，Ｃｒの配合割合を０．３９重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 2
0.00 wt% of Cu, 12.6 wt% of Si, 0.00 wt% of Mg, 0.12 wt% of Fe, and 0 of Mn .01% by weight, 0.39% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
Ｃｕの配合割合を０．００重量％，Ｓｉの配合割合を１２．６重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．１２重量％，Ｍｎの配合割合を０．０１重量％，Ｃｒの配合割合を０．３９重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 2
0.00 wt% of Cu, 12.6 wt% of Si, 0.00 wt% of Mg, 0.12 wt% of Fe, and 0 of Mn .01% by weight, 0.39% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
[比較例３]
Ｃｕの配合割合を０．０１重量％，Ｓｉの配合割合を７．９５重量％，Ｍｇの配合割合を０．１５重量％，Ｆｅの存在割合を０．９２重量％，Ｍｎの配合割合を０．０１重量％，Ｃｒの配合割合を０．２７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 3
0.01% by weight of Cu, 7.95% by weight of Si, 0.15% by weight of Mg, 0.92% by weight of Fe, and 0% of Mn .01 wt%, the blending ratio of Cr is 0.27 wt%, and the remainder is Al inevitable impurities and unavoidable impurities, except that it is prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
Ｃｕの配合割合を０．０１重量％，Ｓｉの配合割合を７．９５重量％，Ｍｇの配合割合を０．１５重量％，Ｆｅの存在割合を０．９２重量％，Ｍｎの配合割合を０．０１重量％，Ｃｒの配合割合を０．２７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 3
0.01% by weight of Cu, 7.95% by weight of Si, 0.15% by weight of Mg, 0.92% by weight of Fe, and 0% of Mn .01 wt%, the blending ratio of Cr is 0.27 wt%, and the remainder is Al inevitable impurities and unavoidable impurities, except that it is prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
[比較例４]
Ｃｕの配合割合を０．９３重量％，Ｓｉの配合割合を８．０７重量％，Ｍｇの配合割合を０．１５重量％，Ｆｅの存在割合を０．７３重量％，Ｍｎの配合割合を０．２０重量％，Ｃｒの配合割合を０．３１重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 4
0.93% by weight of Cu, 8.07% by weight of Si, 0.15% by weight of Mg, 0.73% by weight of Fe, and 0% of Mn .20% by weight, 0.31% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
Ｃｕの配合割合を０．９３重量％，Ｓｉの配合割合を８．０７重量％，Ｍｇの配合割合を０．１５重量％，Ｆｅの存在割合を０．７３重量％，Ｍｎの配合割合を０．２０重量％，Ｃｒの配合割合を０．３１重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 4
0.93% by weight of Cu, 8.07% by weight of Si, 0.15% by weight of Mg, 0.73% by weight of Fe, and 0% of Mn .20% by weight, 0.31% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
[比較例５]
Ｃｕの配合割合を１．０２重量％，Ｓｉの配合割合を８．２０重量％，Ｍｇの配合割合を０．２３重量％，Ｆｅの存在割合を０．９０重量％，Ｍｎの配合割合を０．１７重量％，Ｃｒの配合割合を０．０７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 5
1.02% by weight of Cu, 8.20% by weight of Si, 0.23% by weight of Mg, 0.90% by weight of Fe, and 0% of Mn .17% by weight, 0.07% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
Ｃｕの配合割合を１．０２重量％，Ｓｉの配合割合を８．２０重量％，Ｍｇの配合割合を０．２３重量％，Ｆｅの存在割合を０．９０重量％，Ｍｎの配合割合を０．１７重量％，Ｃｒの配合割合を０．０７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 5
1.02% by weight of Cu, 8.20% by weight of Si, 0.23% by weight of Mg, 0.90% by weight of Fe, and 0% of Mn .17% by weight, 0.07% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
[比較例６]
Ｃｕの配合割合を１．１４重量％，Ｓｉの配合割合を７．０３重量％，Ｍｇの配合割合を０．１３重量％，Ｆｅの存在割合を０．８６重量％，Ｍｎの配合割合を０．２０重量％，Ｃｒの配合割合を０．００重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 6
The mixing ratio of Cu is 1.14% by weight, the mixing ratio of Si is 7.03% by weight, the mixing ratio of Mg is 0.13% by weight, the existing ratio of Fe is 0.86% by weight, the mixing ratio of Mn is 0 .20% by weight, 0.00% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
Ｃｕの配合割合を１．１４重量％，Ｓｉの配合割合を７．０３重量％，Ｍｇの配合割合を０．１３重量％，Ｆｅの存在割合を０．８６重量％，Ｍｎの配合割合を０．２０重量％，Ｃｒの配合割合を０．００重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 6
The mixing ratio of Cu is 1.14% by weight, the mixing ratio of Si is 7.03% by weight, the mixing ratio of Mg is 0.13% by weight, the existing ratio of Fe is 0.86% by weight, the mixing ratio of Mn is 0 .20% by weight, 0.00% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
[比較例７]
Ｃｕの配合割合を１．２８重量％，Ｓｉの配合割合を８．１３重量％，Ｍｇの配合割合を０．２２重量％，Ｆｅの存在割合を０．９０重量％，Ｍｎの配合割合を０．１８重量％，Ｃｒの配合割合を０．０７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 7
The mixing ratio of Cu is 1.28% by weight, the mixing ratio of Si is 8.13% by weight, the mixing ratio of Mg is 0.22% by weight, the existing ratio of Fe is 0.90% by weight, the mixing ratio of Mn is 0 . 18% by weight, 0.07% by weight of Cr and the remainder being Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
Ｃｕの配合割合を１．２８重量％，Ｓｉの配合割合を８．１３重量％，Ｍｇの配合割合を０．２２重量％，Ｆｅの存在割合を０．９０重量％，Ｍｎの配合割合を０．１８重量％，Ｃｒの配合割合を０．０７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)を表２に示す。 Comparative Example 7
The mixing ratio of Cu is 1.28% by weight, the mixing ratio of Si is 8.13% by weight, the mixing ratio of Mg is 0.22% by weight, the existing ratio of Fe is 0.90% by weight, the mixing ratio of Mn is 0 . 18% by weight, 0.07% by weight of Cr and the remainder being Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) of the obtained sample is shown in Table 2.
[比較例８]
Ｃｕの配合割合を１．８９重量％，Ｓｉの配合割合を１０．７重量％，Ｍｇの配合割合を０．２３重量％，Ｆｅの存在割合を０．８７重量％，Ｍｎの配合割合を０．１９重量％，Ｃｒの配合割合を０．０７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金元素組成の範囲外のＡＤＣ１２となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表２に示す。 Comparative Example 8
The mixing ratio of Cu is 1.89% by weight, the mixing ratio of Si is 10.7% by weight, the mixing ratio of Mg is 0.23% by weight, the existing ratio of Fe is 0.87% by weight, the mixing ratio of Mn is 0 . 19% by weight, 0.07% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it is prepared to become ADC12 out of the range of the aluminum alloy element composition in the present invention The sample of the aluminum alloy die-cast was produced on the same conditions as Example 1. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 2.
Ｃｕの配合割合を１．８９重量％，Ｓｉの配合割合を１０．７重量％，Ｍｇの配合割合を０．２３重量％，Ｆｅの存在割合を０．８７重量％，Ｍｎの配合割合を０．１９重量％，Ｃｒの配合割合を０．０７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金元素組成の範囲外のＡＤＣ１２となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表２に示す。 Comparative Example 8
The mixing ratio of Cu is 1.89% by weight, the mixing ratio of Si is 10.7% by weight, the mixing ratio of Mg is 0.23% by weight, the existing ratio of Fe is 0.87% by weight, the mixing ratio of Mn is 0 . 19% by weight, 0.07% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it is prepared to become ADC12 out of the range of the aluminum alloy element composition in the present invention The sample of the aluminum alloy die-cast was produced on the same conditions as Example 1. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 2.
[比較例９]
Ｃｕの配合割合を０．００重量％，Ｓｉの配合割合を７．８７重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．２９重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．３７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表２に示す。 Comparative Example 9
0.00 wt% of Cu, 7.87 wt% of Si, 0.00 wt% of Mg, 0.29 wt% of Fe, and 0 of Mn .00% by weight, 0.37% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 2.
Ｃｕの配合割合を０．００重量％，Ｓｉの配合割合を７．８７重量％，Ｍｇの配合割合を０．００重量％，Ｆｅの存在割合を０．２９重量％，Ｍｎの配合割合を０．００重量％，Ｃｒの配合割合を０．３７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表２に示す。 Comparative Example 9
0.00 wt% of Cu, 7.87 wt% of Si, 0.00 wt% of Mg, 0.29 wt% of Fe, and 0 of Mn .00% by weight, 0.37% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that it was prepared to be outside the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 2.
[比較例１０]
Ｃｕの配合割合を１．８７重量％，Ｓｉの配合割合を８．１５重量％，Ｍｇの配合割合を０．２３重量％，Ｆｅの存在割合を０．８９重量％，Ｍｎの配合割合を０．１９重量％，Ｃｒの配合割合を０．０７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表２に示す。 Comparative Example 10
The mixing ratio of Cu is 1.87% by weight, the mixing ratio of Si is 8.15% by weight, the mixing ratio of Mg is 0.23% by weight, the existing ratio of Fe is 0.89% by weight, the mixing ratio of Mn is 0 .19% by weight, 0.07% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 2.
Ｃｕの配合割合を１．８７重量％，Ｓｉの配合割合を８．１５重量％，Ｍｇの配合割合を０．２３重量％，Ｆｅの存在割合を０．８９重量％，Ｍｎの配合割合を０．１９重量％，Ｃｒの配合割合を０．０７重量％，そして残部をＡｌ不可避不純物及び不可避不純物とすることにより、本発明におけるアルミニウム合金の元素組成の範囲外となるように調製したこと以外は、実施例１と同じ条件にしてアルミニウム合金ダイカストのサンプルを作製した。得られたサンプルの鋳造割れ発生率(％)と機械的特性とを表２に示す。 Comparative Example 10
The mixing ratio of Cu is 1.87% by weight, the mixing ratio of Si is 8.15% by weight, the mixing ratio of Mg is 0.23% by weight, the existing ratio of Fe is 0.89% by weight, the mixing ratio of Mn is 0 .19% by weight, 0.07% by weight of Cr, and the remainder as Al unavoidable impurities and unavoidable impurities, except that the composition is made out of the range of the elemental composition of the aluminum alloy in the present invention Under the same conditions as in Example 1, samples of aluminum alloy die casting were produced. The cast cracking incidence (%) and mechanical properties of the obtained sample are shown in Table 2.
表１及び表２より、実施例１乃至１５のアルミニウム合金は、比較例１乃至１０(但し、比較例９を除く)の合金に比べて、鋳造割れの発生が極めて少ないことがうかがえる。とりわけＡＤＣ１２に相当する比較例８のアルミニウム合金では当然に１００％鋳造割れが発生しているのに対し、実施例のものでは最大でも７％程度しか鋳造割れが発生していない。
From Tables 1 and 2, it can be seen that the aluminum alloys of Examples 1 to 15 have extremely less occurrence of casting cracks as compared with the alloys of Comparative Examples 1 to 10 (except for Comparative Example 9). In particular, 100% casting cracks naturally occur in the aluminum alloy of Comparative Example 8 corresponding to the ADC 12, whereas casting cracks only occur at a maximum of about 7% in the example of the embodiment.
また、実施例２の合金と比較例９の合金とを比較すると、Ｃｕの配合により、アルミニウム合金の引張強さ及び０．２％耐力が向上することがうかがえる。
Moreover, when the alloy of Example 2 and the alloy of Comparative Example 9 are compared, it can be seen that the tensile strength and the 0.2% proof stress of the aluminum alloy are improved by the addition of Cu.
さらに、実施例において機械的特性の測定を行ったものについて、ＡＤＣ１２とほぼ同等かそれ以上の引張強さ及び伸びを有していることがうかがえる。
Furthermore, it can be seen that the mechanical properties measured in the examples have tensile strength and elongation approximately equal to or higher than that of the ADC 12.
Claims (2)
- Ｃｕ：０．２０重量％以上で且つ１．５０重量％以下、Ｓｉ：６．０重量％以上で且つ１０．０重量％未満、Ｍｇ：０．０９重量％以下、Ｆｅ：１．０重量％以下、Ｍｎ：０．４５重量％以下、Ｃｒ：０．５０重量％以下を含有し、残部がＡｌと不可避不純物とからなることを特徴とするダイカスト用アルミニウム合金。 Cu: 0.20% by weight or more and 1.50% by weight or less Si: 6.0% by weight or more and less than 10.0% by weight Mg: 0.09% by weight or less Fe: 1.0% by weight An aluminum alloy for die-casting comprising: Mn: 0.45% by weight or less; Cr: 0.50% by weight or less and the balance comprising Al and unavoidable impurities.
- 請求項１に記載のダイカスト用アルミニウム合金でダイカストされたことを特徴とするアルミニウム合金ダイカスト。
An aluminum alloy die cast comprising the die casting aluminum alloy according to claim 1.
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| KR101779439B1 (en) | 2016-08-09 | 2017-09-26 | 주식회사 에스제이테크 | Method of producing an aluminum alloy for die-casting and aluminum alloy castings using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS50106108A (en) * | 1973-08-03 | 1975-08-21 | ||
| WO2008105066A1 (en) * | 2007-02-27 | 2008-09-04 | Nippon Light Metal Company, Ltd. | Aluminum alloy material for thermal conduction |
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| JPS50106108A (en) * | 1973-08-03 | 1975-08-21 | ||
| WO2008105066A1 (en) * | 2007-02-27 | 2008-09-04 | Nippon Light Metal Company, Ltd. | Aluminum alloy material for thermal conduction |
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| KR101779439B1 (en) | 2016-08-09 | 2017-09-26 | 주식회사 에스제이테크 | Method of producing an aluminum alloy for die-casting and aluminum alloy castings using the same |
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