JP2010531388A - Structural material of Al alloy containing Mg and high Si and method for producing the same - Google Patents

Structural material of Al alloy containing Mg and high Si and method for producing the same Download PDF

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JP2010531388A
JP2010531388A JP2010513624A JP2010513624A JP2010531388A JP 2010531388 A JP2010531388 A JP 2010531388A JP 2010513624 A JP2010513624 A JP 2010513624A JP 2010513624 A JP2010513624 A JP 2010513624A JP 2010531388 A JP2010531388 A JP 2010531388A
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良 左
福暁 于
剛 趙
驤 趙
永亮 楊
艷 李
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Northeastern University China
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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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent

Abstract

【課題】鋳造過程において、如何なる変質剤も添加しない前提の下、加熱塑性加工および熱処理を通じ、良好な塑性を有し、高強度である、Ｍｇおよび高Ｓｉを含むＡｌ合金の構造材料を低コストに製造する。
【解決手段】型材、棒材、板材および鍛造材を含む、Ｍｇおよび高Ｓｉを含むＡｌ合金の構造材料である。構造材料は、半連続鋳造法によりインゴットが製造され、前熱処理により、共晶Ｓｉ相の粒子が拡散化され、次に、加熱塑性加工および熱処理を通じ、最終形状およびミクロ組織が形成される。構造材料中のＭｇの含有量は、０．２〜２．０重量％であり、Ｓｉの含有量は、８〜１８重量％であり、均一に細分化されたミクロ組織構造を有する。Ａｌマトリクス組織は、等軸晶であり、平均粒径は、＜６μｍである。Ｓｉ粒子および他の第２相粒子は、拡散分布し、平均粒径は、＜５μｍである。
【選択図】図１A low-cost Al alloy structural material containing Mg and high Si that has good plasticity and high strength through heat plastic working and heat treatment under the premise that no modifier is added in the casting process. To manufacture.
A structural material of an Al alloy containing Mg and high Si, including a mold, a bar, a plate, and a forged material. As the structural material, an ingot is manufactured by a semi-continuous casting method, particles of the eutectic Si phase are diffused by a pre-heat treatment, and then a final shape and a microstructure are formed through heat plastic working and heat treatment. The content of Mg in the structural material is 0.2 to 2.0% by weight, the content of Si is 8 to 18% by weight, and it has a finely divided microstructure. The Al matrix structure is equiaxed and the average particle size is <6 μm. Si particles and other second phase particles are diffusely distributed and the average particle size is <5 μm.
[Selection] Figure 1

Description

本発明は、Ａｌ合金およびその製造技術に関し、特に、Ｍｇおよび高Ｓｉを含むＡｌ合金の構造材料およびその製造方法に関する。   The present invention relates to an Al alloy and a manufacturing technique thereof, and more particularly to a structural material of an Al alloy containing Mg and high Si and a manufacturing method thereof.

Ａｌ−Ｓｉ合金の中で、特に、Ｓｉの含有量が多いＡｌ−Ｓｉ合金は、低密度、高耐摩耗性、高耐腐食性および低熱膨張係数であることから、自動車工業および航空宇宙技術の領域において、広く応用されている。しかし、ＡＳ ＣＡＳＴのＡｌ−Ｓｉ合金のインゴット中には、粗大な塊状の析出Ｓｉ粒子および板状の共晶組織が存在するため、合金の脆性が極めて高く、塑性加工により、凝固組織を改善することや、各種の断面形状の高性能材料を製造するのが難しい。このため、合金の応用範囲が限定されてしまう。一般に、Ａｌ−Ｓｉ合金は、鋳造Ａｌ合金に分類される。ＡＳ ＣＡＳＴのＡｌ−Ｓｉ合金が変形能力に劣る問題を解決するために、高速凝固させる方法が模索された。しかし、高速凝固させた場合、寸法の小さい（＜１０ｍｍ）塊体のみしか製造されない。仮に、大きな寸法の部材を製造する場合、更なる工程が必要である。典型的な例として、粉末冶金法を通じて製造することができるが、生産コストおよび加工技術が非常に複雑である。   Among the Al-Si alloys, particularly, an Al-Si alloy having a high Si content has low density, high wear resistance, high corrosion resistance, and a low coefficient of thermal expansion. Widely applied in the area. However, in the ingot of the AS CAST Al-Si alloy, there are coarse massive precipitated Si particles and a plate-like eutectic structure, so the brittleness of the alloy is extremely high, and the solidification structure is improved by plastic working. In addition, it is difficult to manufacture high-performance materials having various cross-sectional shapes. For this reason, the application range of an alloy will be limited. In general, Al—Si alloys are classified as cast Al alloys. In order to solve the problem that the AS-CAST Al-Si alloy is inferior in deformability, a method for rapid solidification has been sought. However, when solidified at high speed, only small lumps (<10 mm) are produced. If a member having a large size is to be manufactured, an additional process is required. As a typical example, it can be manufactured through powder metallurgy, but the production costs and processing techniques are very complex.

純Ａｌおよび変形Ａｌ合金を生産する上で、半連続鋳造法（Ｄｉｒｅｃｔ Ｃｈｉｌｌ Ｃａｓｔｉｎｇ：ＤＣ鋳造とも称す）が広く応用されている。この技術で重視されている事項は、如何にして、合金成分の分離を低減し、結晶粒径を小さくし、表面質量を高めるかである。半連続鋳造方法を利用し、変質剤（例えば、Ｐ、Ｎａ、Ｓｒ）を含まない大きな寸法の高Ｓｉ−Ａｌ合金インゴットを製造する特許文献１の技術が本発明の発明者により特許申請され、特許権を取得した。   In producing pure Al and deformed Al alloy, a semi-continuous casting method (also referred to as direct chill casting: DC casting) has been widely applied. What is important in this technology is how to reduce the separation of alloy components, reduce the crystal grain size, and increase the surface mass. The inventor of the present invention has applied for a patent for the technology of Patent Document 1 that uses a semi-continuous casting method to produce a large Si-Al alloy ingot having a large size that does not contain alteration agents (eg, P, Na, Sr). Obtained patent rights.

本発明の発明者は、更なる研究を通じ、上述の発明技術を利用することにより、Ｓｉの下限含有量（８％重量まで）を緩和し、Ｓｉの上限含有量（１８％重量まで）を低減し、Ｍｇの含有量および他の合金元素の含有量を調整し、加熱塑性加工およびその後の熱処理を通じ、良好な塑性を有し、高強度である、Ｍｇおよび高Ｓｉを含むＡｌ合金の構造材料を製造することができることを発見した。   Through further research, the inventor of the present invention relaxed the lower limit content of Si (up to 8% weight) and reduced the upper limit content of Si (up to 18% weight) by utilizing the above-described inventive technique. And adjusting the content of Mg and the content of other alloy elements, and through heat plastic processing and subsequent heat treatment, it has good plasticity and high strength, and is a structural material of Al alloy containing Mg and high Si Discovered that it can be manufactured.

中国特許号ＺＬ２００５１０１１９５５０．６Chinese Patent No. ZL2005101195550.6

本発明の目的は、Ｍｇおよび高Ｓｉを含むＡｌ合金の構造材料およびその方法を提供することにあり、鋳造過程において、如何なる変質剤も添加しない前提の下、加熱塑性加工および熱処理を通じ、良好な塑性を有し、高強度である、Ｍｇおよび高Ｓｉを含むＡｌ合金の構造材料を低コストに製造することができる。   An object of the present invention is to provide a structural material of Al alloy containing Mg and high Si and a method thereof, and in the casting process, under the premise that no altering agent is added, it is preferable to perform heat plastic working and heat treatment. A structural material of Al alloy containing Mg and high Si that has plasticity and high strength can be manufactured at low cost.

上記課題を解決するために、請求項１の発明は、
型材、棒材、板材および鍛造材を含むＭｇおよび高Ｓｉを含むＡｌ合金の構造材料であり、
構造材料は、先ず、半連続鋳造法によりインゴットが製造され、その後、前熱処理により、共晶Ｓｉ相の粒子が拡散化され、次に、加熱塑性加工および熱処理を通じ、最終形状およびミクロ組織が形成されるＡｌ合金であり、強化メカニズムは、Ａｌマトリクスの微細粒強化、Ｓｉ粒子の粒子強化および第２相粒子の沈殿強化であり、
構造材料中のＭｇの含有量は、０．２〜２．０重量％であり、Ｓｉの含有量は、８〜１８重量％であり、均一に細分化されたミクロ組織構造を有し、Ａｌマトリクス組織は、等軸晶であり、平均粒径は、＜６μｍであり、Ｓｉ粒子および他の第２相粒子は、拡散分布し、平均粒径は、＜５μｍであることを特徴とするＭｇおよび高Ｓｉを含むＡｌ合金の構造材料である。 In order to solve the above problems, the invention of claim 1
It is a structural material of Al alloy containing Mg and high Si including mold material, bar material, plate material and forging material,
As for the structural material, an ingot is first manufactured by a semi-continuous casting method, and then eutectic Si phase particles are diffused by pre-heat treatment, and then a final shape and microstructure are formed through heat plastic processing and heat treatment. The strengthening mechanism is Al matrix fine grain strengthening, Si particle grain strengthening and second phase particle precipitation strengthening,
The content of Mg in the structural material is 0.2 to 2.0% by weight, the content of Si is 8 to 18% by weight, and has a finely divided microstructure. Mg is characterized in that the matrix structure is equiaxed, the average particle size is <6 μm, the Si particles and the other second phase particles are diffusely distributed, and the average particle size is <5 μm. And a structural material of Al alloy containing high Si.

請求項２の発明は、Ｃｕ、Ｚｎ、Ｎｉ、ＴｉおよびＦｅの中の少なくとも1つ以上を含み、総含有量が２重量％未満であることを特徴とする請求項１記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料である。   The invention according to claim 2 includes at least one of Cu, Zn, Ni, Ti and Fe, and has a total content of less than 2% by weight. Mg and high Si according to claim 1 A structural material of an Al alloy containing

請求項３の発明は、半連続鋳造法により、インゴットを製造するステップと、
ここで、加工パラメータは、
鋳造温度：対応する合金液相線温度以上の１５０〜３００℃、
鋳造速度：１００〜２００ｍｍ／ｍｉｎ、
インゴットの外周を凝固させる冷却水量：５〜１５ｇ／ｍｍ・ｓ、
であり、如何なる変質剤も添加しない、
インゴットに対し、前熱処理を行うことにより、共晶Ｓｉ相の粒子を拡散化するステップと、
ここで、加工パラメータは、
加熱速度：１０〜３０℃／ｍｉｎ、
加熱温度：４５０〜５２０℃、
保温時間：１〜３ｈｒ、
であり、
前熱処理されたインゴットに対し、加熱塑性加工を行うステップと、
ここで、加工パラメータは、
変形温度：４００〜５２０℃
冷却方式：自然冷却または強制冷却、
であり、
加熱塑性加工がされた後の構造材料に対し、熱処理を行うステップと、を含むことを特徴とするＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法である。 The invention of claim 3 is a step of producing an ingot by a semi-continuous casting method,
Here, the processing parameters are
Casting temperature: 150 to 300 ° C. above the corresponding alloy liquidus temperature,
Casting speed: 100 to 200 mm / min,
Cooling water amount for solidifying the outer periphery of the ingot: 5 to 15 g / mm · s,
And no modifiers are added,
A step of pre-heat-treating the ingot to diffuse the particles of the eutectic Si phase;
Here, the processing parameters are
Heating rate: 10-30 ° C./min,
Heating temperature: 450-520 ° C.
Insulation time: 1-3 hr
And
A step of performing heat plastic processing on the preheated ingot;
Here, the processing parameters are
Deformation temperature: 400-520 ° C
Cooling method: natural cooling or forced cooling,
And
A method for producing a structural material of an Al alloy containing Mg and high Si, comprising the step of performing a heat treatment on the structural material after being subjected to heat plastic working.

請求項４の発明は、加熱塑性加工がされた後、自然冷却された構造材料に対し、固溶化処理および人工時効の熱処理加工を行うステップを含み、
ここで、固溶化処理のパラメータは、
加熱速度：１０〜３０℃／ｍｉｎ、
固溶化処理温度：５００〜５４０℃、
固溶化処理時間：０．５〜３ｈｒ、であり、
人工時効パラメータは、
時効温度：１６０〜２００℃、
時効温度：１〜１０ｈｒ、であることを特徴とする請求項３記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法である。 The invention of claim 4 includes a step of performing a solution treatment and a heat treatment of artificial aging on the naturally cooled structural material after the heat plastic working,
Here, the solution treatment parameters are:
Heating rate: 10-30 ° C./min,
Solution treatment temperature: 500-540 ° C.,
Solution treatment time: 0.5-3 hr,
The artificial aging parameter is
Aging temperature: 160-200 ° C.
4. The method for producing a structural material of Al alloy containing Mg and high Si according to claim 3, wherein the aging temperature is 1 to 10 hours.

請求項５の発明は、加熱塑性加工がされた後、強制冷却された構造材料に対し、固溶化処理または人工時効の熱処理加工を行うステップを含み、
ここで、
人工時効パラメータは、
時効温度：１６０〜２００℃、
時効温度：１〜１０ｈｒ、であることを特徴とする請求項３記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法である。 The invention of claim 5 includes a step of performing a solution treatment or artificial aging heat treatment on the structural material that has been forcibly cooled after the heat plastic working,
here,
The artificial aging parameter is
Aging temperature: 160-200 ° C.
4. The method for producing a structural material of Al alloy containing Mg and high Si according to claim 3, wherein the aging temperature is 1 to 10 hours.

請求項６の発明は、加熱塑性加工として圧延加工がされるとき、圧延総圧下量は、４０％を超えることを特徴とする請求項３記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法である。   The invention of claim 6 is characterized in that the total rolling reduction exceeds 40% when the rolling process is carried out as thermoplastic processing. The structural material of the Al alloy containing Mg and high Si according to claim 3 It is a manufacturing method.

請求項７の発明は、加熱塑性加工として押出加工がされるとき、押出比は、１５を超えることを特徴とする請求項３記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法である。   The invention according to claim 7 is the method for producing a structural material of an Al alloy containing Mg and high Si according to claim 3, wherein the extrusion ratio exceeds 15 when extrusion is performed as thermoplastic processing. is there.

請求項８の発明は、加熱塑性加工として鍛造加工がされるとき、鍛造比は、４０％を超えることを特徴とする請求項３記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法である。   The invention according to claim 8 is a method for producing a structural material of an Al alloy containing Mg and high Si according to claim 3, wherein the forging ratio exceeds 40% when forging is performed as thermoplastic processing. It is.

本発明は、従来技術の欠点を克服し、如何なる変質剤も添加しない前提の下、従来技術である半連続鋳造法により、Ｍｇおよび高Ｓｉを含むＡｌ合金を製造し、加熱塑性加工および熱処理を行うことにより、Ｓｉ粒子を細かく拡散させ、第２相を等軸晶のＡｌマトリクス上に分布させることができ、良好な塑性を有し、高強度である、Ａｌ合金の加工材料を製造することができる。   The present invention overcomes the drawbacks of the prior art and, under the premise that no modifier is added, produces an Al alloy containing Mg and high Si by the conventional semi-continuous casting method, and performs heat plastic working and heat treatment. By doing this, the Si particles can be finely diffused, the second phase can be distributed on the equiaxed Al matrix, and the processed material of the Al alloy having good plasticity and high strength can be produced. Can do.

表１は、本発明により製造される押出Ｓｉ−Ａｌ合金（Ａｌ−８．５Ｓｉ−１．８Ｍｇ−０．２７Ｆｅ、Ａｌ−１２．７Ｓｉ−０．７Ｍｇ−１．５Ｃｕ−０．３Ｎｉ−０．３Ｔｉ−０．３ＦｅおよびＡｌ−１５．５Ｓｉ−０．７Ｍｇ−０．２７Ｆｅ）の押出および熱処理状態の下での力学性能を示し、中国国家基準中の押出６０６３合金のＴ５およびＴ６状態の下の力学性能と比較する。

Figure 2010531388
Table 1 shows the extruded Si-Al alloys produced according to the present invention (Al-8.5Si-1.8Mg-0.27Fe, Al-12.7Si-0.7Mg-1.5Cu-0.3Ni-0. 3Ti-0.3Fe and Al-15.5Si-0.7Mg-0.27Fe) showing the mechanical performance under extrusion and heat treatment conditions, under the T5 and T6 states of extruded 6063 alloy in Chinese national standards Compare with mechanical performance.
Figure 2010531388

表１から、Ａｌ−１５．５Ｓｉ−０．７Ｍｇ−０．２７Ｆｅ、Ａｌ−１２．７Ｓｉ−０．７Ｍｇ−１．５Ｃｕ−０．３Ｎｉ−０．３Ｔｉ−０．３ＦｅおよびＡｌ−８．５Ｓｉ−１．８Ｍｇ−０．２７Ｆｅの合金は、Ｔ６状態の下の降伏強度および引張強度が６０６３合金のＴ６状態の国家基準よりも高いことが分かる。合金の押出状態（Ｔ１）の力学性能の中で、特に、延伸率が６０６０合金のＴ５状態の国家基準よりも高い。６０６３合金は、最も汎用性の高い押出型材合金であり、国内外の建築、車両、装飾などの領域において大量に応用されており、大きな需要がある。従って、６０６３合金に代わり、本発明のＭｇおよび高Ｓｉを含むＡｌ合金が使用された場合、大きな経済効果をもたらす。また、Ｓｉの添加により、Ａｌ資源を大量に節約することができる。   From Table 1, Al-15.5Si-0.7Mg-0.27Fe, Al-12.7Si-0.7Mg-1.5Cu-0.3Ni-0.3Ti-0.3Fe, and Al-8.5Si- It can be seen that the 1.8 Mg-0.27 Fe alloy has higher yield strength and tensile strength under the T6 state than the national standard of the T63 state of the 6063 alloy. Among the mechanical performance of the extruded state (T1) of the alloy, in particular, the stretch ratio is higher than the national standard of the T5 state of 6060 alloy. The 6063 alloy is the most versatile extruded material alloy and is applied in large quantities in the fields of architecture, vehicles, decorations, etc. in Japan and abroad, and has a great demand. Therefore, when the Al alloy containing Mg and high Si of the present invention is used instead of the 6063 alloy, a great economic effect is brought about. Further, by adding Si, a large amount of Al resources can be saved.

半連続鋳造設備の構造を示す模式図である。It is a schematic diagram which shows the structure of a semi-continuous casting installation. 本発明の実施例１のＡｌ−１２．７Ｓｉ−０．７Ｍｇ−０．３Ｆｅ合金（♯３）の半連続鋳造（鋳造温度７３０℃、鋳造速度１８０ｍｍ／ｍｉｎ、冷却水流量８ｇ／ｍｍ・ｓ）インゴットの鋳造状態のミクロ組織を示す顕微鏡写真である。Semi-continuous casting of Al-12.7Si-0.7Mg-0.3Fe alloy (# 3) of Example 1 of the present invention (casting temperature 730 ° C., casting speed 180 mm / min, cooling water flow rate 8 g / mm · s) It is a microscope picture which shows the microstructure of the casting state of an ingot. 本発明の実施例１のＡｌ−１２．７Ｓｉ−０．７Ｍｇ−０．３Ｆｅ合金（♯３）の半連続鋳造（鋳造温度７３０℃、鋳造速度１８０ｍｍ／ｍｉｎ、冷却水流量８ｇ／ｍｍ・ｓ）インゴットの鋳造状態のミクロ組織を示す高倍率顕微鏡写真である。Semi-continuous casting of Al-12.7Si-0.7Mg-0.3Fe alloy (# 3) of Example 1 of the present invention (casting temperature 730 ° C., casting speed 180 mm / min, cooling water flow rate 8 g / mm · s) It is a high magnification photomicrograph which shows the microstructure of the casting state of an ingot. 本発明の実施例２の半連続鋳造されたＡｌ−１２．７Ｓｉ−０．７Ｍｇ−０．３Ｆｅ合金（♯３）に５００℃の前熱処理を２ｈｒ行い、４７０℃の加熱押出（押出比１５）を行った後のミクロ組織を示す顕微鏡写真である。The semi-continuous cast Al-12.7Si-0.7Mg-0.3Fe alloy (# 3) of Example 2 of the present invention was subjected to pre-heat treatment at 500 ° C. for 2 hours, and heated extrusion at 470 ° C. (extrusion ratio 15). It is a microscope picture which shows the micro structure after performing. 本発明の実施例３の半連続鋳造されたＡｌ−１２．７Ｓｉ−０．７Ｍｇ−０．３Ｆｅ合金（♯３）に５００℃の前熱処理を２ｈｒ行い、４７０℃の加熱押出（押出比１５）を行った後、Ｔ６状態（固溶温度５４０℃、時間１ｈｒ、人工時効温度２００℃、時間３ｈｒ）のミクロ組織を示す顕微鏡写真である。The semi-continuous cast Al-12.7Si-0.7Mg-0.3Fe alloy (# 3) of Example 3 of the present invention was subjected to a preheat treatment at 500 ° C. for 2 hours and heated extrusion at 470 ° C. (extrusion ratio 15). Is a photomicrograph showing the microstructure of the T6 state (solid solution temperature 540 ° C., time 1 hr, artificial aging temperature 200 ° C., time 3 hr). 本発明の実施例１のＡｌ−１５．５Ｓｉ−０．７Ｍｇ−０．２７Ｆｅ合金（♯５）の半連続鋳造（鋳造温度８００℃、鋳造速度１４０ｍｍ／ｍｉｎ、冷却水流量１０ｇ／ｍｍ・ｓ）インゴットの鋳造状態のミクロ組織を示す顕微鏡写真である。Semi-continuous casting of Al-15.5Si-0.7Mg-0.27Fe alloy (# 5) of Example 1 of the present invention (casting temperature 800 ° C., casting speed 140 mm / min, cooling water flow rate 10 g / mm · s) It is a microscope picture which shows the microstructure of the casting state of an ingot. 本発明の実施例１のＡｌ−１５．５Ｓｉ−０．７Ｍｇ−０．２７Ｆｅ合金（♯５）の半連続鋳造（鋳造温度８００℃、鋳造速度１４０ｍｍ／ｍｉｎ、冷却水流量１０ｇ／ｍｍ・ｓ）インゴットの鋳造状態のミクロ組織を示す高倍率顕微鏡写真である。Semi-continuous casting of Al-15.5Si-0.7Mg-0.27Fe alloy (# 5) of Example 1 of the present invention (casting temperature 800 ° C., casting speed 140 mm / min, cooling water flow rate 10 g / mm · s) It is a high magnification photomicrograph which shows the microstructure of the casting state of an ingot. 本発明の実施例２の半連続鋳造されたＡｌ−１５．５Ｓｉ−０．７Ｍｇ−０．２７Ｆｅ合金（♯５）に５００℃の前熱処理を２ｈｒ行い、４７０℃の加熱押出（押出比４５）を行った後のミクロ組織を示す顕微鏡写真である。The semi-continuous cast Al-15.5Si-0.7Mg-0.27Fe alloy (# 5) of Example 2 of the present invention was subjected to pre-heat treatment at 500 ° C. for 2 hours and heated extrusion at 470 ° C. (extrusion ratio 45). It is a microscope picture which shows the micro structure after performing. 本発明の実施例２の半連続鋳造されたＡｌ−１５．５Ｓｉ−０．７Ｍｇ−０．２７Ｆｅ合金（♯５）の矩形インゴットに５００℃の前熱処理を１ｈｒ行い、５００℃の加熱圧延（圧下量６０％）を行った後のミクロ組織を示す顕微鏡写真である。The pre-heat treatment at 500 ° C. was performed for 1 hr on the rectangular ingot of the Al-15.5Si-0.7Mg-0.27Fe alloy (# 5) semi-continuously casted in Example 2 of the present invention for 1 hour, followed by 500 ° C. hot rolling (reduction) It is a microscope picture which shows the microstructure after performing 60% of quantity. 本発明の実施例３の半連続鋳造されたＡｌ−１５．５Ｓｉ−０．７Ｍｇ−０．２７Ｆｅ合金（♯５）に５００℃の前熱処理を２ｈｒ行い、４７０℃の加熱押出（押出比１５）を行った後、Ｔ６状態（固溶温度５２０℃、時間２ｈｒ、人工時効温度１８０℃、時間４ｈｒ）のミクロ組織を示す顕微鏡写真である。The semi-continuous cast Al-15.5Si-0.7Mg-0.27Fe alloy (# 5) of Example 3 of the present invention was subjected to a preheat treatment at 500 ° C. for 2 hours and heated extrusion at 470 ° C. (extrusion ratio 15). Is a photomicrograph showing the microstructure of the T6 state (solid solution temperature 520 ° C., time 2 hr, artificial aging temperature 180 ° C., time 4 hr). 本発明の実施例３の半連続鋳造されたＡｌ−１５．５Ｓｉ−０．７Ｍｇ−０．２７Ｆｅ合金（♯５）の矩形インゴットに５００℃の前熱処理を１ｈｒ行い、５００℃の加熱圧延（圧下量６０％）を行った後、Ｔ６状態（固溶温度５２０℃、時間３ｈｒ、人工時効温度２００℃、時間４ｈｒ）のミクロ組織を示す顕微鏡写真である。A semi-continuous cast Al-15.5Si-0.7Mg-0.27Fe alloy (# 5) rectangular ingot of Example 3 of the present invention was subjected to preheating treatment at 500 ° C. for 1 hr, followed by heating and rolling at 500 ° C. (reduction) It is a photomicrograph showing the microstructure of the T6 state (solid solution temperature 520 ° C., time 3 hr, artificial aging temperature 200 ° C., time 4 hr) after performing the amount 60%. 本発明の実施例３の半連続鋳造されたＡｌ−１５．５Ｓｉ−０．７Ｍｇ−０．２７Ｆｅ合金（♯５）に５００℃の前熱処理を２ｈｒ行い、４７０℃の加熱押出（押出比４５）を行った後、Ｔ６状態（固溶温度５２０℃、時間２ｈｒ、人工時効温度１８０℃、時間４ｈｒ）のミクロ組織を示す高倍率顕微鏡写真である。The semi-continuous cast Al-15.5Si-0.7Mg-0.27Fe alloy (# 5) of Example 3 of the present invention was preheated at 500 ° C. for 2 hours, and heated extrusion at 470 ° C. (extrusion ratio 45). Is a high-power micrograph showing the microstructure of the T6 state (solid solution temperature 520 ° C., time 2 hr, artificial aging temperature 180 ° C., time 4 hr). 本発明の実施例１のＡｌ−１７．５Ｓｉ−０．７Ｍｇ−１．０Ｃｕ−０．２７Ｆｅ合金（♯７）の半連続鋳造（鋳造温度８５０℃、鋳造速度１２０ｍｍ／ｍｉｎ、冷却水流量１０ｇ／ｍｍ・ｓ）インゴットの鋳造状態のミクロ組織を示す顕微鏡写真である。Semi-continuous casting of Al-17.5Si-0.7Mg-1.0Cu-0.27Fe alloy (# 7) of Example 1 of the present invention (casting temperature 850 ° C., casting speed 120 mm / min, cooling water flow rate 10 g / It is a microscope picture which shows the microstructure of the casting state of a mm * s) ingot.

（実施例１）
半連続鋳造により、インゴットを製造した。 Example 1
Ingots were produced by semi-continuous casting.

設備は自作の設備である。構造原理を図１に示す。図中、１−冷却水、２−晶析装置、３―ブランク材、４−ホットトップ、５−黒鉛リング、６−金属液である。合金の化学成分を表２に示す。鋳造加工パラメータを表３に示す。

Figure 2010531388
Figure 2010531388
 The equipment is self-made. The structural principle is shown in FIG. In the figure, 1-cooling water, 2-crystallizer, 3-blank material, 4-hot top, 5-graphite ring, 6-metal liquid. The chemical composition of the alloy is shown in Table 2. Table 3 shows the casting parameters.
Figure 2010531388
Figure 2010531388

（実施例２）
鋳造した合金インゴットの前熱処理、押出、圧延および鍛造を行った。 (Example 2)
The cast alloy ingot was preheated, extruded, rolled and forged.

前熱処理は、熱処理炉中において所定の加熱速度で加熱し、所定の温度に達した後、所定の時間保温した。その後、押出機、加熱圧延機および鍛造機により、塑性変形を完了させた。具体的な加工パラメータを表４、表５および表６中に記す。

Figure 2010531388
Figure 2010531388
Figure 2010531388
 In the pre-heat treatment, heating was performed in a heat treatment furnace at a predetermined heating rate, and after reaching a predetermined temperature, the temperature was kept for a predetermined time. Thereafter, plastic deformation was completed by an extruder, a hot rolling mill, and a forging machine. Specific processing parameters are shown in Table 4, Table 5, and Table 6.
Figure 2010531388
Figure 2010531388
Figure 2010531388

（実施例３）
合金変形（押出、圧延、鍛造）後、熱処理を行った。 (Example 3)
After alloy deformation (extrusion, rolling, forging), heat treatment was performed.

所定の熱処理パラメータの下、押出、圧延、鍛造を行った材料の熱処理を行った。具体的な熱処理加工パラメータは、表７、表８および表９中に記す。一部合金の変形および熱処理後の力学性能を表１０に記す。

Figure 2010531388
Figure 2010531388
Figure 2010531388
Figure 2010531388
 Under predetermined heat treatment parameters, heat treatment was performed on the extruded, rolled, and forged materials. Specific heat treatment parameters are shown in Table 7, Table 8, and Table 9. Table 10 shows the mechanical performance after deformation and heat treatment of some alloys.
Figure 2010531388
Figure 2010531388
Figure 2010531388
Figure 2010531388

本発明のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料およびその製造方法により、鋳造過程において、如何なる変質剤も添加しない前提の下、加熱塑性加工および熱処理を通じ、良好な塑性を有し、高強度である、Ｍｇおよび高Ｓｉを含むＡｌ合金の構造材料を低コストに製造することができた。   With the structural material of Al alloy containing Mg and high Si of the present invention and its manufacturing method, it has good plasticity and high strength through heat plastic working and heat treatment under the premise that no alteration agent is added in the casting process. The structural material of Al alloy containing Mg and high Si was able to be manufactured at low cost.

１ 冷却水
２ 晶析装置
３ ブランク材
４ ホットトップ
５ 黒鉛リング
６ 金属液 DESCRIPTION OF SYMBOLS 1 Cooling water 2 Crystallizer 3 Blank material 4 Hot top 5 Graphite ring 6 Metal liquid

Claims (8)

型材、棒材、板材および鍛造材を含むＭｇおよび高Ｓｉを含むＡｌ合金の構造材料であり、
前記構造材料は、先ず、半連続鋳造法によりインゴットが製造され、その後、前熱処理により、共晶Ｓｉ相の粒子が拡散化され、次に、加熱塑性加工および熱処理を通じ、最終形状およびミクロ組織が形成されるＡｌ合金であり、強化メカニズムは、Ａｌマトリクスの微細粒強化、Ｓｉ粒子の粒子強化および第２相粒子の沈殿強化であり、
前記構造材料中のＭｇの含有量は、０．２〜２．０重量％であり、Ｓｉの含有量は、８〜１８重量％であり、均一に細分化されたミクロ組織構造を有し、前記Ａｌマトリクス組織は、等軸晶であり、平均粒径は、＜６μｍであり、Ｓｉ粒子および他の第２相粒子は、拡散分布し、平均粒径は、＜５μｍであることを特徴とするＭｇおよび高Ｓｉを含むＡｌ合金の構造材料。 It is a structural material of Al alloy containing Mg and high Si including mold material, bar material, plate material and forging material,
As for the structural material, first, an ingot is manufactured by a semi-continuous casting method, and then particles of the eutectic Si phase are diffused by pre-heat treatment, and then the final shape and microstructure are obtained through heat plastic working and heat treatment. The formed Al alloy, the strengthening mechanism is the fine strengthening of Al matrix, strengthening of Si particles, and precipitation strengthening of second phase particles,
The content of Mg in the structural material is 0.2 to 2.0% by weight, the content of Si is 8 to 18% by weight, and has a finely divided microstructure. The Al matrix structure is equiaxed, the average particle size is <6 μm, the Si particles and other second phase particles are diffusely distributed, and the average particle size is <5 μm. Al alloy structural material containing Mg and high Si. Ｃｕ、Ｚｎ、Ｎｉ、ＴｉおよびＦｅの中の少なくとも1つ以上を含み、総含有量が２重量％未満であることを特徴とする請求項１記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料。   The structural material of Al alloy containing Mg and high Si according to claim 1, characterized in that it contains at least one of Cu, Zn, Ni, Ti and Fe, and the total content is less than 2% by weight. . 半連続鋳造法により、インゴットを製造するステップと、
ここで、加工パラメータは、
鋳造温度：対応する合金液相線温度以上の１５０〜３００℃、
鋳造速度：１００〜２００ｍｍ／ｍｉｎ、
インゴットの外周を凝固させる冷却水量：５〜１５ｇ／ｍｍ・ｓ、
であり、如何なる変質剤も添加しない、
前記インゴットに対し、前熱処理を行うことにより、共晶Ｓｉ相の粒子を拡散化するステップと、
ここで、加工パラメータは、
加熱速度：１０〜３０℃／ｍｉｎ、
加熱温度：４５０〜５２０℃、
保温時間：１〜３ｈｒ、
であり、
前記前熱処理されたインゴットに対し、加熱塑性加工を行うステップと、
ここで、加工パラメータは、
変形温度：４００〜５２０℃
冷却方式：自然冷却または強制冷却、
であり、
前記加熱塑性加工がされた後の構造材料に対し、熱処理を行うステップと、を含むことを特徴とするＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法。 Producing an ingot by a semi-continuous casting method;
Here, the processing parameters are
Casting temperature: 150 to 300 ° C. above the corresponding alloy liquidus temperature,
Casting speed: 100 to 200 mm / min,
Cooling water amount for solidifying the outer periphery of the ingot: 5 to 15 g / mm · s,
And no modifiers are added,
Performing pre-heat treatment on the ingot to diffuse eutectic Si phase particles;
Here, the processing parameters are
Heating rate: 10-30 ° C./min,
Heating temperature: 450-520 ° C.
Insulation time: 1-3 hr
And
Performing a heat plastic working on the preheated ingot;
Here, the processing parameters are
Deformation temperature: 400-520 ° C
Cooling method: natural cooling or forced cooling,
And
A method for producing a structural material of an Al alloy containing Mg and high Si, comprising the step of heat-treating the structural material after the heat plastic working. 加熱塑性加工がされた後、自然冷却された構造材料に対し、固溶化処理および人工時効の熱処理加工を行うステップを含み、
ここで、固溶化処理のパラメータは、
加熱速度：１０〜３０℃／ｍｉｎ、
固溶化処理温度：５００〜５４０℃、
固溶化処理時間：０．５〜３ｈｒ、であり、
人工時効パラメータは、
時効温度：１６０〜２００℃、
時効温度：１〜１０ｈｒ、であることを特徴とする請求項３記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法。 After the heat plastic processing is performed, the structure material that is naturally cooled includes a step of performing a solution treatment and a heat treatment of artificial aging,
Here, the solution treatment parameters are:
Heating rate: 10-30 ° C./min,
Solution treatment temperature: 500-540 ° C.,
Solution treatment time: 0.5-3 hr,
The artificial aging parameter is
Aging temperature: 160-200 ° C.
4. The method for producing a structural material of Al alloy containing Mg and high Si according to claim 3, wherein the aging temperature is 1 to 10 hours. 加熱塑性加工がされた後、強制冷却された構造材料に対し、固溶化処理または人工時効の熱処理加工を行うステップを含み、
ここで、
人工時効パラメータは、
時効温度：１６０〜２００℃、
時効温度：１〜１０ｈｒ、であることを特徴とする請求項３記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法。 After the heat plastic processing, forcibly cooled structural material includes a step of performing a solution treatment or heat treatment of artificial aging,
here,
The artificial aging parameter is
Aging temperature: 160-200 ° C.
4. The method for producing a structural material of Al alloy containing Mg and high Si according to claim 3, wherein the aging temperature is 1 to 10 hours. 前記加熱塑性加工として圧延加工がされるとき、圧延総圧下量は、４０％を超えることを特徴とする請求項３記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法。   The method for producing a structural material of an Al alloy containing Mg and high Si according to claim 3, wherein the total rolling reduction exceeds 40% when rolling is performed as the thermoplastic processing. 前記加熱塑性加工として押出加工がされるとき、押出比は、１５を超えることを特徴とする請求項３記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法。   The method for producing a structural material of an Al alloy containing Mg and high Si according to claim 3, wherein when the extrusion is performed as the heat plastic working, the extrusion ratio exceeds 15. 前記加熱塑性加工として鍛造加工がされるとき、鍛造比は、４０％を超えることを特徴とする請求項３記載のＭｇおよび高Ｓｉを含むＡｌ合金の構造材料の製造方法。   The method for producing a structural material of an Al alloy containing Mg and high Si according to claim 3, wherein when the forging is performed as the thermoplastic processing, the forging ratio exceeds 40%.
JP2010513624A 2007-06-29 2008-06-30 Structural material of Al alloy containing Mg and high Si and method for producing the same Pending JP2010531388A (en)

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