JPS6245303B2 - - Google Patents
Info
- Publication number
- JPS6245303B2 JPS6245303B2 JP55075918A JP7591880A JPS6245303B2 JP S6245303 B2 JPS6245303 B2 JP S6245303B2 JP 55075918 A JP55075918 A JP 55075918A JP 7591880 A JP7591880 A JP 7591880A JP S6245303 B2 JPS6245303 B2 JP S6245303B2
- Authority
- JP
- Japan
- Prior art keywords
- titanium
- aluminum
- magnesium
- content
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 20
- 239000010936 titanium Substances 0.000 claims description 20
- 229910052719 titanium Inorganic materials 0.000 claims description 20
- 238000005266 casting Methods 0.000 claims description 19
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 6
- 229910052796 boron Inorganic materials 0.000 claims description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052790 beryllium Inorganic materials 0.000 claims description 5
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 description 16
- 239000000956 alloy Substances 0.000 description 16
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 9
- 229910000861 Mg alloy Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 description 3
- 238000007743 anodising Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000010407 anodic oxide Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
本発明は耐圧性のよい鋳造用アルミニウム合金
に関するものであり、特にアルミニウム―マグネ
シウム系でかつ耐圧性のよい鋳造用合金に関する
ものである。
一般にAC7Aに代表されるアルミニウム―マグ
ネシウム系鋳造用合金は、アルミニウム―銅系や
アルミニウム―珪素系等の鋳造用アルミニウム合
金に比較して、すぐれた耐蝕性、陽極酸化性およ
び機械加工性等を有している。しかし、このアル
ミニウム―マグネシウム系鋳造用合金は、凝固温
度範囲が広く、かつ凝固収縮量が大きいので、鋳
造時にガスポロシテイやミクロシユリンケージ等
の鋳造欠陥を生じて耐圧不良を起しやすい。特に
複雑な形状を有する鋳物では、ホツトスポツト等
の凝固の遅れる箇所に前述の鋳造欠陥を生じ易い
ので、指向性凝固を厳密に図らねばならず、鋳型
の設計を難しくしている。
従つてアルミニウム―マグネシウム系鋳造用合
金は、圧力鍋、自動車用ホイール、機械部品等の
耐圧性を要求される鋳物や複雑な形状を有する鋳
物に対しては、その使用が制限されている。
本発明は、アルミニウム―マグネシウム系でか
つ耐圧性の良い鋳造用合金を提供することを目的
とするものである。
本発明に係る合金は、マグネシウム3.0〜5.5
％、マンガン0.10〜1.0％、ベリリウム0.001〜
0.01％、チタン0.15〜0.60％およびチタンに対し
２〜20％の硼素を含有し、残余は実質的に不純物
とアルミニウムとから成る鋳造用アルミニウム合
金である（本明細書において、％は特記しない限
り重量％である）。
本発明についてさらに詳細に説明すると、本発
明に係る合金は、AC7Aで代表される耐蝕性、陽
極酸化性および機械加工性等にすぐれたアルミニ
ウム―マグネシウム系合金を、これらの諸性質を
維持したままで耐圧性の点において改良したもの
である。
本発明の合金において、マグネシウムは機械的
性質の向上に寄与するが、その含有量は3.0〜5.5
％であることが必要である。マグネシウムがこれ
よりも少いと機械的強度が小さく、また、マグネ
シウムがこれよりも多いと伸びが小さくなり、さ
らに鋳造性も低下する。
マンガンは鋳造性、機械的性質、耐応力腐蝕性
等の向上に寄与する。マンガン含有量は0.10〜
1.0％の範囲から選択し得るが、0.20〜0.60％の範
囲にあることが好ましい。
ベリリウムは合金を溶解する際のマグネシウム
の酸化を防止する作用がある。その含有量は
0.001〜0.01％の範囲にあればよいが、通常は
0.001〜0.004％で十分である。
チタンおよび硼素は結晶粒を微細化し、ガスポ
ロシテイ及びミクロシユリンケージを減少させ
る。チタン含有量は0.15〜0.60％の範囲にあるこ
とが必要であり、含有量が少なすぎると耐圧性の
すぐれた鋳物を得ることはできない。また、チタ
ン含有量が多すぎると溶湯中でのTiB2の沈降が
著るしくなり、鋳造作業上問題がある。チタンの
好適な含有量は0.20〜0.50％である。硼素はチタ
ンに対し２〜20％の範囲で存在させる。硼素はチ
タンの結晶粒微細化作用をさらに向上させるが、
チタンに対し20％より多く含有させると、その作
用はかえつて減退する。
本発明に係る鋳造用合金は、アルミニウム―マ
グネシウム合金の良好な諸性質を維持したままで
耐圧性が改良されているので、最近、脚光をあび
ている圧力鍋、自動車用ホイール、油圧ポンプ等
の部品などの耐圧性の要求される物品の鋳造に好
適である。
次に実施例により本発明をさらに具体的に説明
するが、本発明はその要旨を超えない限り、以下
の実施例に限定されるものではない。
実施例 １
750℃で脱ガス、脱滓処理を実施した表―１に
示す組成の合金を用いて、金型温度400〜450℃、
鋳造温度740℃で外径250mm、高さ150mmで一端が
閉鎖された円筒状の容器（肉厚６mm）を鋳造し
た。これを肉厚４mmに切削加工後、３〜５Kg／cm2
の水圧で水漏れの有無を試験した。結果を表―１
に示す。
また、上記の円筒から50mm×50mmの試料片を切
り出し、下記の条件で陽極酸化を行なつたとこ
ろ、いずれの試験片もすぐれた陽極酸化皮膜を生
じた。
電解浴 ３％シユウ酸水溶液
電流密度 直流3A／ｄm2、交流6A／ｄm2
の交直重畳。
浴 温 25℃±２℃
陽極酸化時間 10分間
本発明に係る合金のミクロ組織には約0.1mmの
アルミニウム―チタン系晶出物が認められるが、
陽極酸化皮膜はアルミニウム―チタン系晶出物の
認められないチタン含有量0.03％の合金のそれと
同等であつた。従つてアルミニウム―チタン系晶
出物は陽極酸化に悪影響を及ぼさないことが判明
した。
The present invention relates to an aluminum alloy for casting having good pressure resistance, and particularly to an aluminum-magnesium based casting alloy having good pressure resistance. In general, aluminum-magnesium-based casting alloys, such as AC7A, have superior corrosion resistance, anodizing properties, and machinability compared to aluminum-copper-based and aluminum-silicon-based casting aluminum alloys. are doing. However, since this aluminum-magnesium based casting alloy has a wide solidification temperature range and a large amount of solidification shrinkage, it tends to cause casting defects such as gas porosity and microshrinkage during casting, resulting in poor pressure resistance. Particularly in castings with complex shapes, the aforementioned casting defects are likely to occur at locations where solidification is delayed, such as hot spots, so directional solidification must be strictly achieved, making mold design difficult. Therefore, the use of aluminum-magnesium based casting alloys is limited to castings that require pressure resistance, such as pressure cookers, automobile wheels, and mechanical parts, and castings that have complex shapes. An object of the present invention is to provide an aluminum-magnesium based casting alloy with good pressure resistance. The alloy according to the present invention has magnesium 3.0 to 5.5
%, manganese 0.10~1.0%, beryllium 0.001~
It is a cast aluminum alloy containing 0.01% titanium, 0.15% to 0.60% titanium, and 2% to 20% boron relative to titanium, with the remainder consisting essentially of impurities and aluminum (in this specification, % indicates unless otherwise specified). % by weight). To explain the present invention in more detail, the alloy according to the present invention is an aluminum-magnesium alloy represented by AC7A which has excellent corrosion resistance, anodizing property, machinability, etc., while maintaining these properties. This is an improved version in terms of pressure resistance. In the alloy of the present invention, magnesium contributes to improving mechanical properties, but its content is between 3.0 and 5.5
%. If the magnesium content is less than this, the mechanical strength will be low, and if the magnesium content is more than this, the elongation will be small and the castability will also be reduced. Manganese contributes to improving castability, mechanical properties, stress corrosion resistance, etc. Manganese content is 0.10~
It can be selected from the range of 1.0%, but preferably from 0.20 to 0.60%. Beryllium has the effect of preventing the oxidation of magnesium when melting the alloy. Its content is
It should be in the range of 0.001 to 0.01%, but usually
0.001-0.004% is sufficient. Titanium and boron refine grains and reduce gas porosity and microshrinkage. The titanium content must be in the range of 0.15 to 0.60%; if the titanium content is too low, a casting with excellent pressure resistance cannot be obtained. Furthermore, if the titanium content is too high, TiB 2 will significantly settle in the molten metal, causing problems in casting operations. The preferred content of titanium is 0.20-0.50%. Boron is present in an amount of 2 to 20% based on titanium. Boron further improves the grain refining effect of titanium, but
If the content exceeds 20% of titanium, its effect will be reduced. The casting alloy according to the present invention has improved pressure resistance while maintaining the good properties of aluminum-magnesium alloys, and has recently been in the spotlight for parts such as pressure cookers, automobile wheels, and hydraulic pumps. It is suitable for casting products that require pressure resistance such as. EXAMPLES Next, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to the following Examples unless it exceeds the gist thereof. Example 1 Using an alloy with the composition shown in Table 1 that was degassed and de-slaged at 750°C, the mold temperature was 400-450°C,
A cylindrical container (6 mm wall thickness) with an outer diameter of 250 mm, a height of 150 mm, and one end closed was cast at a casting temperature of 740°C. After cutting this into a wall thickness of 4mm, it weighs 3~5Kg/cm 2
The presence or absence of water leakage was tested at the water pressure of . Table of results-1
Shown below. Further, when 50 mm x 50 mm sample pieces were cut out from the above cylinder and anodized under the following conditions, all test pieces produced excellent anodic oxide films. Electrolytic bath 3% oxalic acid aqueous solution Current density DC 3A/dm 2 , AC 6A/dm 2
Orthogonal superposition of Bath temperature: 25°C±2°C Anodizing time: 10 minutes Approximately 0.1 mm of aluminum-titanium crystallized material is observed in the microstructure of the alloy according to the present invention.
The anodic oxide film was equivalent to that of an alloy with a titanium content of 0.03%, in which no aluminum-titanium crystallized substances were observed. Therefore, it was found that the aluminum-titanium-based crystallized material had no adverse effect on anodic oxidation.
【表】【table】
【表】
実施例 ２
マグネシウム4.9％、マンガン0.48％、ベリリ
ウム0.002％、チタン0.03〜0.5％、およびチタン
に対して４％の硼素を含み、残部は珪素0.04％、
鉄0.07％以外は実質的にアルミニウムである合金
溶湯を用いて、試験片甲及び乙を鋳造した。試験
片甲は、550℃に予熱したイソライトレンガ上
に、同温度に予熱した肉厚25mm、外径120mm、高
さ25mmの円筒状金型を置き、これに溶湯温度740
℃で溶湯を注入することにより鋳造した。試験片
乙は、550℃に予熱したJIS舟金型に同じく溶湯温
度740℃で溶湯を注入することにより鋳造した。
試験片甲の下端から15mmの位置の横断面の結晶
粒数を測定した結果を第１図に示す。
また、試験片乙から25×25×15mmの試料を切り
出し、その密度を測定した結果を第２図に示す。
第１図および第２図から、本発明に係る合金は
チタン含有量が増加するにつれて結晶粒が微細化
し、密度が増加している。従つて、本発明に係る
合金の耐圧性がすぐれているのは、ガスポロシテ
イおよびミクロシユリンケージの減少によるもの
と推定される。[Table] Example 2 Contains 4.9% magnesium, 0.48% manganese, 0.002% beryllium, 0.03 to 0.5% titanium, and 4% boron relative to titanium, the balance being 0.04% silicon,
Test specimens A and B were cast using a molten alloy containing substantially aluminum except for 0.07% iron. For the test piece A, a cylindrical mold with a wall thickness of 25 mm, an outer diameter of 120 mm, and a height of 25 mm, which had been preheated to the same temperature, was placed on an isolite brick preheated to 550°C, and the molten metal was heated to a temperature of 740°C.
It was cast by pouring the molten metal at ℃. Test piece B was cast by pouring molten metal at a temperature of 740°C into a JIS boat mold preheated to 550°C. Figure 1 shows the results of measuring the number of crystal grains in a cross section at a position 15 mm from the lower end of the test piece shell. In addition, a 25 x 25 x 15 mm sample was cut out from the test piece O, and its density was measured. The results are shown in Figure 2. From FIGS. 1 and 2, as the titanium content increases, the crystal grains of the alloy according to the present invention become finer and the density increases. Therefore, it is presumed that the superior pressure resistance of the alloy according to the present invention is due to the reduction in gas porosity and microshrinkage.
第１図はアルミニウム―マグネシウム系合金の
チタン含有量と結晶粒数との関係の１例を示す図
である。第２図は同じくアルミニウム―マグネシ
ウム系合金のチタン含有量と密度との関係の１例
を示す図である。
FIG. 1 is a diagram showing an example of the relationship between the titanium content and the number of crystal grains in an aluminum-magnesium alloy. FIG. 2 is a diagram showing an example of the relationship between titanium content and density of an aluminum-magnesium alloy.
Claims (1)
％、ベリリウム0.001〜0.01％、チタン0.15〜0.60
％およびチタンに対し２〜20％の硼素を含有し、
残余は実質的に不純物とアルミニウムとから成る
耐圧性のよい鋳造用アルミニウム合金。 ２ マンガン含有量が0.20〜0.60％であることを
特徴とする特許請求の範囲第１項記載のアルミニ
ウム合金。 ３ ベリリウム含有量が0.001〜0.004％であるこ
とを特徴とする特許請求の範囲第１項または第２
項記載のアルミニウム合金。 ４ チタン含有量が0.20〜0.50％であることを特
徴とする特許請求の範囲第１項ないし第３項のい
ずれかに記載のアルミニウム合金。[Claims] 1. Magnesium 3.0-5.5%, manganese 0.10-1.0
%, beryllium 0.001-0.01%, titanium 0.15-0.60
% and contains 2 to 20% boron to titanium,
The remainder is an aluminum alloy for casting with good pressure resistance, consisting essentially of impurities and aluminum. 2. The aluminum alloy according to claim 1, wherein the manganese content is 0.20 to 0.60%. 3. Claim 1 or 2, characterized in that the beryllium content is 0.001 to 0.004%.
Aluminum alloy as described in Section 1. 4. The aluminum alloy according to any one of claims 1 to 3, characterized in that the titanium content is 0.20 to 0.50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7591880A JPS572858A (en) | 1980-06-05 | 1980-06-05 | Aluminum alloy for casting with high pressure resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7591880A JPS572858A (en) | 1980-06-05 | 1980-06-05 | Aluminum alloy for casting with high pressure resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS572858A JPS572858A (en) | 1982-01-08 |
| JPS6245303B2 true JPS6245303B2 (en) | 1987-09-25 |
Family
ID=13590171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7591880A Granted JPS572858A (en) | 1980-06-05 | 1980-06-05 | Aluminum alloy for casting with high pressure resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS572858A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2640993B2 (en) * | 1990-06-11 | 1997-08-13 | スカイアルミニウム株式会社 | Aluminum alloy rolled plate for superplastic forming |
| EP0618303B1 (en) * | 1993-03-26 | 1997-06-11 | Hitachi Metals, Ltd. | Airtight aluminum alloy casting and its manufacturing method |
| EP0892077A1 (en) * | 1997-07-18 | 1999-01-20 | Aluminum Company Of America | Cast aluminium alloy and components produced thereof |
| CN101537486B (en) * | 2009-04-30 | 2013-06-05 | 哈尔滨工业大学 | Method for preventing 5XXX aluminum alloy cast ingot from surface ruffle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3503738A (en) * | 1967-09-15 | 1970-03-31 | Hugh S Cooper | Metallurgical process for the preparation of aluminum-boron alloys |
-
1980
- 1980-06-05 JP JP7591880A patent/JPS572858A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3503738A (en) * | 1967-09-15 | 1970-03-31 | Hugh S Cooper | Metallurgical process for the preparation of aluminum-boron alloys |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS572858A (en) | 1982-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111690844B (en) | Eutectic Al-Fe-Mn-Si-Mg die casting alloy and preparation method and application thereof | |
| WO2021185209A1 (en) | High-strength, high-corrosion resistance ternary magnesium alloy and preparation method therefor | |
| CN110983120A (en) | 300 MPa-grade high-strength plastic non-heat-treatment self-strengthening die-casting aluminum alloy and manufacturing method thereof | |
| US20190161834A1 (en) | High-strength aluminum alloy for die casting having excellent corrosion resistance and thermal conductivity, method for producing the same, and method for producing aluminum alloy casting using the same | |
| CN113862523A (en) | Al-Mn series die-casting alloy and preparation method and application thereof | |
| US11807928B2 (en) | Copper-based casting products and processes | |
| JPS6245303B2 (en) | ||
| US3392015A (en) | Aluminum-base alloy for use at elevated temperatures | |
| JPS5810455B2 (en) | Aluminum alloy for rolling | |
| JP6900199B2 (en) | Manufacturing method of aluminum alloy for casting, aluminum alloy casting products and aluminum alloy casting products | |
| KR810002049B1 (en) | Non-erosion aluminium alloy for die-casting | |
| CA3135702C (en) | Aluminium casting alloy | |
| US1946069A (en) | Magnesium base die casting alloys | |
| JP2019005758A (en) | Die-cast product, method for producing the same, and die casting machine | |
| JPH0132300B2 (en) | ||
| JPS5830381B2 (en) | Bright corrosion resistant Al alloy for die casting | |
| US3993474A (en) | Fluid mold casting slag | |
| JPS61136652A (en) | Aluminum alloy for casting | |
| JPS594496B2 (en) | Aluminum alloy for casting | |
| JPS621463B2 (en) | ||
| KR102353612B1 (en) | Magnesium alloy, magnesium alloy plate using thereof, and method for manufacturing of magnesium alloy plate | |
| AU2022333523A1 (en) | Improved aluminium based casting alloy | |
| JPH10158771A (en) | Aluminum alloy for casting, excellent in pressure resistance | |
| Hino et al. | Effect of Surface Treatment on Glossiness of Al–Mg–Zn Alloy Casting | |
| EP4124668A1 (en) | Cast alloy |