JPH01294841A - High-strength aluminum alloy for casting - Google Patents
High-strength aluminum alloy for castingInfo
- Publication number
- JPH01294841A JPH01294841A JP12331088A JP12331088A JPH01294841A JP H01294841 A JPH01294841 A JP H01294841A JP 12331088 A JP12331088 A JP 12331088A JP 12331088 A JP12331088 A JP 12331088A JP H01294841 A JPH01294841 A JP H01294841A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- alloy
- strength
- less
- aluminum alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 21
- 238000005266 casting Methods 0.000 title claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 229910052790 beryllium Inorganic materials 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 7
- 229910052710 silicon Inorganic materials 0.000 abstract description 6
- 229910052802 copper Inorganic materials 0.000 abstract description 5
- 229910052748 manganese Inorganic materials 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- 229910052725 zinc Inorganic materials 0.000 abstract description 5
- 229910052804 chromium Inorganic materials 0.000 abstract 3
- 229910052749 magnesium Inorganic materials 0.000 abstract 3
- 229910052719 titanium Inorganic materials 0.000 abstract 3
- 230000002542 deteriorative effect Effects 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 description 12
- 239000000956 alloy Substances 0.000 description 12
- 238000005336 cracking Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 229910018571 Al—Zn—Mg Inorganic materials 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910018134 Al-Mg Inorganic materials 0.000 description 1
- 229910018182 Al—Cu Inorganic materials 0.000 description 1
- 229910018467 Al—Mg Inorganic materials 0.000 description 1
- 229910009369 Zn Mg Inorganic materials 0.000 description 1
- 229910007573 Zn-Mg Inorganic materials 0.000 description 1
- 238000003483 aging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はＴ６処理時の引張り強度が４Ｑ ｋｇ ／ ｔ
ｍ ”以上であり、且つ高温強度の改善された熱間割れ
を起こさない鋳造用アルミニウム合金に関するものであ
る。[Detailed description of the invention] [Industrial application field] The present invention has a tensile strength of 4Q kg/t when treated with T6.
The present invention relates to an aluminum alloy for casting which has a heat cracking resistance of at least 100 m and has improved high-temperature strength and does not cause hot cracking.
〔従来技術とその問題点］
従来、鋳造用アルミニウム合金としてはＡｌ−Ｃｕ、Ａ
ｌ−５ｉ及びＡｌ−Ｍｇを基とするものが使用されてい
るが、これらは引張り強度が３５ｋｇ／ｍ”以下である
。そこで最近では部材の軽量化のため鋳造用アルミニウ
ム合金の構造部材としての需要が伸びると共に４Ｑ ｋ
ｇ ／ ｖｍ ”以上の引張り強度をもつ鋳造用高力ア
ルミニウム合金が要望されてきた。この要求に応するも
のとしてＡｌ−Ｚｎ−Ｍｇ系合金がある。[Prior art and its problems] Conventionally, aluminum alloys for casting include Al-Cu, A
Those based on l-5i and Al-Mg are used, but these have a tensile strength of less than 35 kg/m''.Recently, in order to reduce the weight of parts, aluminum alloys for casting have been used as structural members. 4Q k as demand grows
There has been a demand for a high-strength aluminum alloy for casting that has a tensile strength of 100 g/vm or more.Al-Zn-Mg alloys meet this demand.
即ちＡｌ−Ｚｎ−Ｍｇ系合金は引張り強度４０ ｋｇ
／ ｍ＊ ２以上であって溶接構造用アルミニウム合金
として優れた性能を有し、欧米ではクレーン、車両２戦
車あるいは特殊橋梁等の重構造材として多く用いられて
いる。この系の合金は容体化処理後、高温は勿論、常温
しも時効硬化し、又焼入鈍感性であるといわれる。従っ
て、この材料を溶接すると溶接熱で軟化した部分は溶接
後常温で時効硬化し、素材の強さ近くまで回復するので
、高い継手効率が得られる。然るに上記高力アルミニウ
ム合金は、耐食性（主として応力腐食）に問題があり、
又、熱間割れも起こりやすく、鋳造用合金としては適性
に欠けるという問題点があった。In other words, the Al-Zn-Mg alloy has a tensile strength of 40 kg.
/ m*2 or more, and has excellent performance as an aluminum alloy for welded structures, and is often used in Europe and America as heavy structural materials such as cranes, vehicles, tanks, and special bridges. This type of alloy undergoes age hardening not only at high temperatures but also at room temperature after container treatment, and is said to be insensitive to quenching. Therefore, when this material is welded, the parts that have been softened by the welding heat will age harden at room temperature after welding and recover to nearly the strength of the material, resulting in high joint efficiency. However, the above-mentioned high-strength aluminum alloys have problems with corrosion resistance (mainly stress corrosion).
In addition, hot cracking is likely to occur, making it unsuitable as a casting alloy.
本発明は、かかる従来例の欠点に鑑みてなされたもので
、その目的とする処は、その特長である高引張り強度を
損なう事なく、従来不可能と考えられていた熱間割れを
解消乃至軽減し得た画期的な鋳造用高力アルミニウム合
金を提供するにある。The present invention was made in view of the drawbacks of the conventional examples, and its purpose is to eliminate hot cracking, which was thought to be impossible in the past, without sacrificing the high tensile strength that is its feature. The purpose of the present invention is to provide an innovative high-strength aluminum alloy for casting that can reduce weight.
本発明は上記目的を達成するために第１項では、鋳造用
高力アルミニウム合金の化学的成分を、Ｚｎ４．７０〜
５．５０％、Ｍｎ０．３０〜０．４０％、Ｍｇ２．７５
〜３．２５％、Ｔｉｅ、 １５〜０．２５％、Ｃｒ０．
２５〜０．３５％、Ｂｅ０．０１％以下残余アルミニウ
ム合金とし、第２項の鋳造用高力アルミニウムの化学的
成分をＣｕ０．２５％以下、Ｆｅ０．９％以下、Ｓｉ
１％以下、Ｚｎ４．７０〜５．５０％、Ｍｎ０゜３０〜
０．４０％、Ｍｇ２，７５〜３．２５％、Ｔｊ０．１５
〜０．２５％、Ｃｒ０．２５〜０．４０％、Ｂｅ０．０
１％以下、残余アルミニウムとするという技術的手段を
採用している。In order to achieve the above-mentioned object, the present invention, in item 1, sets the chemical composition of a high-strength aluminum alloy for casting to Zn4.70 to Zn4.70.
5.50%, Mn0.30-0.40%, Mg2.75
~3.25%, Tie, 15~0.25%, Cr0.
25 to 0.35%, Be 0.01% or less residual aluminum alloy, and the chemical composition of the high strength aluminum for casting in item 2 is Cu 0.25% or less, Fe 0.9% or less, Si
1% or less, Zn4.70~5.50%, Mn0°30~
0.40%, Mg2,75-3.25%, Tj0.15
~0.25%, Cr0.25~0.40%, Be0.0
A technical measure has been adopted to ensure that the residual aluminum content is 1% or less.
高力へ１−Ｚｎ−Ｍｇ系合金は高引張り強度（４０１ｇ
／ｍ”以上）に特長があるものの応力腐食や熱間割礼な
どの欠点があり、高力鋳物材料としての適性に欠けるも
のである。1-Zn-Mg alloy has high tensile strength (401g
/m” or more), but it has drawbacks such as stress corrosion and hot circumcision, making it unsuitable as a high-strength casting material.
そこで、上記のような化学成分に調製した時、特にＢｅ
の存在により本系合金の特長である高引張り強度を損な
う事なくその最大の欠点である熱間割れを解消乃至軽減
出来て本系合金の鋳物材料としての用途を拓いたもので
ある。Therefore, when prepared with the above chemical components, especially Be
Due to the presence of this alloy, hot cracking, which is its biggest drawback, can be eliminated or reduced without sacrificing the high tensile strength that is a feature of this alloy, opening up the use of this alloy as a casting material.
以下、本発明に係る高力アルミニウム合金について詳述
する０本発明の第１項の高力アルミニウム合金の化学的
成分はＺｎ４．７０〜５．５０％、Ｍｎ０．３０〜０．
４０％、Ｍｇ２．７５〜３．２５％、Ｔｉ０．１５〜０
．２５％、Ｃｒｙ。The high-strength aluminum alloy according to the present invention will be described in detail below.The chemical composition of the high-strength aluminum alloy according to item 1 of the present invention is Zn 4.70-5.50%, Mn 0.30-0.
40%, Mg2.75-3.25%, Ti0.15-0
．． 25%, Cry.
２５〜０．３５％、Ｂｅ０．０１％以下残余アルミニウ
ムであり、第２項の鋳造用高力アルミニウムの化学的成
分は、Ｆｅ０．９％以下、Ｓｉ １％以下、Ｚｎ４．７
０〜５．５０％、Ｍｎ０．３０〜０．４０％、Ｍｇ２．
７５〜３．２５％、Ｔｉ０．１５〜０゜２５％、Ｃｒ０
．２５〜０．３５％、Ｂｅ０．０１％以下、残余アルミ
ニウムである。この本発明合金の特徴である熱間割れ防
止効果を従来合金により示す。25 to 0.35%, Be 0.01% or less residual aluminum, and the chemical components of the high strength aluminum for casting in item 2 are Fe 0.9% or less, Si 1% or less, Zn 4.7
0-5.50%, Mn0.30-0.40%, Mg2.
75~3.25%, Ti0.15~0°25%, Cr0
．． 25 to 0.35%, Be 0.01% or less, and residual aluminum. The effect of preventing hot cracking, which is a characteristic of the alloy of the present invention, will be demonstrated using a conventional alloy.
第↓表コゴ砧財ψお結果
試験方法は環状鋳型試験法を用いたが、この方法は環状
に鋳込んだ鋳物の収縮を中子で抑制し、発生した割れの
長さの総計で表示するものである。Table ↓Results The test method used the annular mold test method, which uses a core to suppress the shrinkage of a casting cast in an annular shape, and displays the total length of the cracks that occur. It is something.
第１表であきらかな事はＢｅを添加したものは添加しな
かったものに対して熱間割れが全く生じないか、熱間割
れが非常に軽減されるという事である。What is clear from Table 1 is that hot cracking does not occur at all or the hot cracking is greatly reduced in the products to which Be is added, compared to those to which Be is not added.
次に引張り強度について説明する。試験はＴ、処理（焼
入れ、焼戻し）材について行った。なお、従来合金のＴ
ｈ処理の引張り強度は４３ ｋｇ ／ ｗ ”以上であ
る。Next, tensile strength will be explained. The test was conducted on T, treated (quenched, tempered) material. In addition, T of the conventional alloy
The tensile strength of h treatment is more than 43 kg/w''.
第２ 声量験結果
以上より、Ｂｅを添加する事によって、引張り強さを損
なう事なく熱間割れが著しく改善された事が分かる。2. From the results of the volume test above, it can be seen that by adding Be, hot cracking was significantly improved without impairing the tensile strength.
又、上記で試料５〜７はアルミニウム１次合金による試
料であり、Ｃｕ、 Ｆｅ、 Ｓｉ等の成分がほとんど含
まれていないものであり、試料８〜１１はアルミニウム
２次合金による試料で、Ｃｕ、 Ｆｅ、 Ｓｉ等の各成
分を若干含むものであるが、Ｂｅの添加により熱間割れ
が十分に抑制されるものである。In addition, Samples 5 to 7 above are samples made of a primary aluminum alloy, and contain almost no components such as Cu, Fe, and Si, and Samples 8 to 11 are samples made of a secondary aluminum alloy, and contain almost no components such as Cu, Fe, or Si. , Fe, Si, etc., but the addition of Be sufficiently suppresses hot cracking.
本発明で供した試料は、環状鋳型試験の際にＪＩｓ舟型
に鋳造され、これを自然時効、人工時効して機械加工に
より、ＪＩＳ４号試験片としたもので、これを用いて引
張試験、硬度試験を行った。The sample provided in the present invention was cast into a JIS boat shape during the annular mold test, and was made into a JIS No. 4 test piece by natural aging, artificial aging, and machining. A hardness test was conducted.
熱処理条件は４６０°ＣＸ４ｈｒ溶体化処理を行い、８
０°Ｃの温水浴で焼入し、１２０°ＣＸ８ｈｒ焼戻を行
うＴ６処理である。The heat treatment conditions were solution treatment at 460°C for 4 hours,
This is T6 treatment, which is quenching in a 0°C hot water bath and tempering at 120°C for 8 hours.
機械試験装置は、引張試験ではアムスラー型万能試験機
（１０屯スケール）を、硬度試験では、ブリネル硬度計
（５００ｇ荷重、１０１１φ球）を用いた。As the mechanical testing device, an Amsler type universal testing machine (10 ton scale) was used for the tensile test, and a Brinell hardness tester (500 g load, 1011φ ball) was used for the hardness test.
本発明は叙上のように、高力Ａｌ−Ｚｎ−Ｍｇ系合金で
ある。その化学成分は第１項ではＺｎ４．５０〜５．５
０％、Ｍｎ０．３０〜０．４０％、Ｍｇ２．７５〜４．
００％、Ｔｉ０．１５〜０．２５％、Ｃｒ０．２５〜０
．４０％、Ｂｅ０．０１％以下残余アルミニウムであり
、第２項が、Ｃｕ０．２５％以下、Ｆｅ０．９％以下、
Ｓｉ １％以下、Ｚｎ４．５０〜５．５０％、Ｍｎ０．
３０〜０２４０％、Ｍｇ２．７５〜３．２５％、Ｔｉ０
．１５〜０．２５％、Ｃｒ０．２５〜０．４０％、Ｂｅ
０．０１％以下、残余アルミニウムであってＢｅの存在
によりその大きな特長である高引張り強度を損なう事な
く熱間割れを解消乃至著しく軽減出来たものであり、し
かも第２項において、Ｃｕ、 Ｆｅ、 Ｓｉ等を若干含
んだとしても上記改善が損なわれないものであって、ア
ルミニウム１次合金は勿論、アルミ２次合金にも十分適
用出来るという利点がある。As mentioned above, the present invention is a high strength Al-Zn-Mg alloy. Its chemical composition is Zn4.50-5.5 in the first term.
0%, Mn0.30-0.40%, Mg2.75-4.
00%, Ti0.15-0.25%, Cr0.25-0
．． 40%, Be 0.01% or less residual aluminum, and the second term is Cu 0.25% or less, Fe 0.9% or less,
Si 1% or less, Zn 4.50-5.50%, Mn 0.
30-0240%, Mg2.75-3.25%, Ti0
．． 15-0.25%, Cr0.25-0.40%, Be
0.01% or less, residual aluminum, and the presence of Be can eliminate or significantly reduce hot cracking without impairing its major feature, high tensile strength, and in item 2, Cu, Fe , Si, etc., does not impair the above-mentioned improvement, and has the advantage that it can be sufficiently applied not only to primary aluminum alloys but also to secondary aluminum alloys.
Claims (2)
４０％、Ｍｇ２．７５〜４．００％、Ｔｉ０．１５〜０
．２５％、Ｃｒ０．２５〜０．４０％、Ｂｅ０．０１％
以下、残余アルミニウムから成る鋳造用高力アルミニウ
ム合金。(1) Zn4.50-5.50%, Mn0.30-0.
40%, Mg2.75-4.00%, Ti0.15-0
．． 25%, Cr0.25-0.40%, Be0.01%
The following is a high-strength aluminum alloy for casting made of residual aluminum.
％以下、Ｚｎ４．５０〜５．５０％、Ｍｎ０．３０〜０
．４０％、Ｍｇ２．７５〜３．２５％、Ｔｉ０．１５〜
０．２５％、Ｃｒ０．２５〜０．４０％、Ｂｅ０．０１
％以下、残余アルミニウムから成る鋳造用高力アルミニ
ウム合金。(2) Cu0.25% or less, Fe0.9% or less, Si1
% or less, Zn4.50-5.50%, Mn0.30-0
．． 40%, Mg2.75~3.25%, Ti0.15~
0.25%, Cr0.25-0.40%, Be0.01
High-strength aluminum alloy for casting, consisting of less than % residual aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12331088A JPH01294841A (en) | 1988-05-20 | 1988-05-20 | High-strength aluminum alloy for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12331088A JPH01294841A (en) | 1988-05-20 | 1988-05-20 | High-strength aluminum alloy for casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01294841A true JPH01294841A (en) | 1989-11-28 |
Family
ID=14857378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12331088A Pending JPH01294841A (en) | 1988-05-20 | 1988-05-20 | High-strength aluminum alloy for casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01294841A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2568310A (en) * | 2017-11-14 | 2019-05-15 | Jaguar Land Rover Ltd | Aluminium alloy for high presure die casting |
| KR20190091301A (en) * | 2016-11-28 | 2019-08-05 | 맥마스터 유니버시티 | Structural and non-structural semi-formal cast aluminum alloys and methods for manufacturing the same |
-
1988
- 1988-05-20 JP JP12331088A patent/JPH01294841A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190091301A (en) * | 2016-11-28 | 2019-08-05 | 맥마스터 유니버시티 | Structural and non-structural semi-formal cast aluminum alloys and methods for manufacturing the same |
| JP2020501028A (en) * | 2016-11-28 | 2020-01-16 | マクマスター・ユニバーシティＭｃｍａｓｔｅｒ Ｕｎｉｖｅｒｓｉｔｙ | Structural and non-structural near-net casting aluminum alloys and methods of making same |
| US11634795B2 (en) | 2016-11-28 | 2023-04-25 | Mcmaster University | Aluminium alloys for structural and non-structural near net casting, and methods for producing same |
| GB2568310A (en) * | 2017-11-14 | 2019-05-15 | Jaguar Land Rover Ltd | Aluminium alloy for high presure die casting |
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