JP2915490B2 - High strength aluminum alloy for welded structural materials with excellent resistance to stress corrosion cracking - Google Patents
High strength aluminum alloy for welded structural materials with excellent resistance to stress corrosion crackingInfo
- Publication number
- JP2915490B2 JP2915490B2 JP11600490A JP11600490A JP2915490B2 JP 2915490 B2 JP2915490 B2 JP 2915490B2 JP 11600490 A JP11600490 A JP 11600490A JP 11600490 A JP11600490 A JP 11600490A JP 2915490 B2 JP2915490 B2 JP 2915490B2
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- weight
- stress corrosion
- corrosion cracking
- aluminum alloy
- strength
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Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は圧延材,押出材,鍛造材として溶接構造材に
用いられる高力アルミニウム合金に関し,さらに詳しく
は,耐応力腐食割れ性に優れた溶接構造材用Al-Zn-Mg系
高力アルミニウム合金に関する。The present invention relates to a high-strength aluminum alloy used as a rolled material, an extruded material, and a forged material for a welded structural material, and more particularly, to a material excellent in stress corrosion cracking resistance. The present invention relates to an Al-Zn-Mg high strength aluminum alloy for welding structural materials.
(従来の技術とその課題) 近年,建築,車両,船舶,航空機等においては,益々
薄肉軽量化が進み,溶接可能な高力アルミニウム合金の
要求が高まって来ている。従来,これらの用途に対する
アルミニウム合金としては,Al-Zn-Mg系合金やAl-Zn-Mg-
Cu合金が考えられてきた。この種の高力アルミニウム合
金は,Zn,Mg量を増加するに従って高強度になるが,それ
に伴って応力腐食割れ感受性や溶接割れ感受性が高くな
る傾向があり,又,圧延,押出,鍛造等の熱間加工性も
劣化してくる。(Prior art and its problems) In recent years, in buildings, vehicles, ships, aircrafts, and the like, thinning and weight reduction have been progressing, and the demand for weldable high-strength aluminum alloys has been increasing. Conventionally, aluminum alloys for these applications include Al-Zn-Mg alloys and Al-Zn-Mg-
Cu alloys have been considered. This type of high-strength aluminum alloy has higher strength as the amount of Zn and Mg increases, but it tends to increase the susceptibility to stress corrosion cracking and welding cracking. Hot workability also deteriorates.
圧延,押出,鍛造等の成形が可能で,構造材に用いら
れる高力アルミニウム合金として代表的なものにA7075
合金がある。該合金の強度はアルミニウム合金の中でも
最高に属するが,Cuを含むため溶接性が著しく劣り,接
合はボルト締め,リベット等の機械的接合によらなけれ
ばならない。また,該合金は応力腐食割れ感受性が高い
ため,従来は本来最高強度が得られる熱処理であるT6処
理では,応力腐食割れが起こる危険があるため,それよ
りさらに高い温度又は長い時間の焼き戻しを行い組織を
安定化させたT7処理で使用することが多い。A7075 can be formed by rolling, extrusion, forging, etc., and is a typical high-strength aluminum alloy used for structural materials.
There are alloys. Although the strength of the alloy belongs to the highest among aluminum alloys, the weldability is remarkably poor due to the inclusion of Cu, and the joining must be performed by mechanical joining such as bolting and rivets. In addition, since the alloy has high sensitivity to stress corrosion cracking, there is a risk that stress corrosion cracking may occur in the T6 treatment, which is the heat treatment that originally provides the highest strength, so tempering at a higher temperature or for a longer time is required. Often used in T7 treatment to stabilize the performed tissue.
7000系アルミニウム合金の中で,圧延,押出,鍛造等
の成形が可能で,しかも溶接性,耐応力腐食割れ性に優
れたアルミニウム合金としてはA7N01が良く知られてい
る。また,押出性の良好なA7003も溶接性,耐応力腐食
割れ性に優れたアルミニウム合金である。しかしながら
これらの合金では強度が比較的低いため,更に強度を要
する用途には適さなかった。上記のごとく従来の技術で
は強度,耐応力腐食割れ性,溶接性の全ての面で満足が
得られ,しかも押出,圧延,鍛造等の成形性にも優れた
アルミニウム合金を得ることは甚だ困難であった。Among the 7000 series aluminum alloys, A7N01 is well known as an aluminum alloy that can be formed by rolling, extrusion, forging, etc., and has excellent weldability and stress corrosion cracking resistance. A7003, which has good extrudability, is also an aluminum alloy with excellent weldability and stress corrosion cracking resistance. However, these alloys have relatively low strength and are not suitable for applications requiring more strength. As described above, it is extremely difficult to obtain an aluminum alloy that is satisfactory in all aspects of strength, stress corrosion cracking resistance, and weldability, and that has excellent formability such as extrusion, rolling, and forging. there were.
(発明が解決しようとする課題) 本発明は,従来の技術では解決できなかった,強度,
耐応力腐食割れ性,溶接性の全ての面で満足が得られ,
しかも,押出,圧延,鍛造等の成形にも優れた材料を提
供することを目的とするものである。(Problems to be Solved by the Invention) The present invention has a strength,
Satisfaction was obtained in all aspects of stress corrosion cracking resistance and weldability.
Moreover, it is an object of the present invention to provide a material excellent in forming such as extrusion, rolling, and forging.
(課題を解決するための手段) 本発明者らは,前述の様な事情に着目し,上記したごと
き,強度,耐応力腐食割れ性,溶接性の全ての面で満足
が得られ,しかも,押出,圧延,鍛造等の成形性にも優
れたアルミニウム合金の開発を期して,合金成分の種
類,含有率を変えて,種々検討した。その結果,下記の
ごとく合金成分の種類,含有率を特定してやれば上記の
目的を達成できることを見出し,本発明の完成をみた。(Means for Solving the Problems) The present inventors have paid attention to the above-mentioned circumstances, and as described above, have been satisfied in all aspects of strength, stress corrosion cracking resistance, and weldability, and With the aim of developing an aluminum alloy with excellent formability such as extrusion, rolling, and forging, various studies were conducted by changing the type and content of alloy components. As a result, the inventors have found that the above objects can be achieved by specifying the types and contents of alloy components as described below, and have completed the present invention.
即ち,本発明に係る耐応力腐食割れに優れる溶接用高
力アルミニウム合金の構成とは,Zn5〜8重量%、Mg1.2
〜4.0重量%、Cu1.5重量%を越え4.0重量%以下、Ag0.0
3〜1.0重量%、希土類元素又はミッシュメタル0.03〜5.
0重量%、Fe0.01〜1.0重量%、Ti0.005〜0.2重量%を含
有し、かつ、Mn0.01〜1.5重量%、Cr0.01〜0.6重量%、
Zr0.01〜0.25重量%、B0.0001〜0.08重量%、Mo0.03〜
0.5重量%のうちの少なくとも1種または2種以上を含
み、残りアルミニウム及び不可避不純物からなるところ
が要旨である。That is, the composition of the high-strength aluminum alloy for welding according to the present invention, which is excellent in stress corrosion cracking resistance, is defined as Zn 5 to 8 wt%, Mg 1.2
~ 4.0% by weight, Cu 1.5% by weight to 4.0% by weight or less, Ag 0.0
3 to 1.0% by weight, rare earth element or misch metal 0.03 to 5.
0% by weight, Fe 0.01 to 1.0% by weight, Ti 0.005 to 0.2% by weight, and Mn 0.01 to 1.5% by weight, Cr 0.01 to 0.6% by weight,
Zr0.01 ~ 0.25% by weight, B0.0001 ~ 0.08% by weight, Mo0.03 ~
The gist is that at least one or more of 0.5% by weight is contained, and the balance consists of aluminum and unavoidable impurities.
すなわち本発明は、Al-Zn-Mg-Cu系合金にAgおよび稀土
類元素またはミッシュメタルを添加することにより耐応
力腐食割れ性及び強度と耐溶接割れ性を向上させたもの
である。That is, the present invention improves stress corrosion cracking resistance and strength and weld cracking resistance by adding Ag and a rare earth element or a misch metal to an Al-Zn-Mg-Cu alloy.
(作用) 本発明に係る上記アルミニウム合金の成分の種類と含
有率の限定理由について説明すると次のとおりである。(Operation) The reasons for limiting the types and contents of the components of the aluminum alloy according to the present invention will be described below.
Znは,硬化要素として合金の強度の増大のために不可
欠の元素であり,含有量が5重量%未満ではその効果が
少なく,8重量%を越えると耐応力腐食割れ性,溶接性,
加工性が劣化する。Znの最も好ましい含有量は5〜8重
量%である。Zn is an indispensable element for increasing the strength of the alloy as a hardening element. If its content is less than 5 wt%, its effect is small, and if it exceeds 8 wt%, stress corrosion cracking resistance, weldability,
Workability deteriorates. The most preferred content of Zn is 5 to 8% by weight.
Mgは,これもZnと同様に強度向上に不可欠な元素であ
り,含有量が1.2重量%未満では充分な強度が得られず,
4.0重量%を越えて含有されると耐応力腐食割れ性,溶
接性,加工性が劣化する。よって,Mgの最も好ましい含
有量は1.2〜4.0重量%である。Mg, like Zn, is also an indispensable element for improving the strength. If the content is less than 1.2% by weight, sufficient strength cannot be obtained.
If the content exceeds 4.0% by weight, the stress corrosion cracking resistance, weldability and workability deteriorate. Therefore, the most preferred content of Mg is 1.2-4.0% by weight.
Cuは,これもZnと同様に強度向上に不可欠な元素であ
り,含有量が1.5重量%以下では十分な強度が得られ
ず、4.0重量%を越えて含有量されると耐応力腐食割れ
性、溶接性、加工性が劣化する。よって、Cuの最も好ま
しい含有量は1.5重量%を越え4.0重量%以下である。Cu, like Zn, is also an indispensable element for improving the strength. If the content is less than 1.5% by weight, sufficient strength cannot be obtained, and if the content exceeds 4.0% by weight, stress corrosion cracking resistance , Weldability and workability deteriorate. Therefore, the most preferable content of Cu is more than 1.5% by weight and 4.0% by weight or less.
Agは,耐応力腐食割れ性及び強度を向上させる元素で
あり,含有量が0.03重量%未満ではその効果が少なく,
1.0重量%を越えて含有させると溶接性が劣化する。よ
ってAgの最も好ましい含有量は0.03〜1.0重量%であ
る。Ag is an element that improves the stress corrosion cracking resistance and strength. If its content is less than 0.03% by weight, its effect is small.
If the content exceeds 1.0% by weight, the weldability deteriorates. Therefore, the most preferable content of Ag is 0.03 to 1.0% by weight.
稀土類元素又はミッシュメタルは,耐応力腐食割れ性
及び耐溶接割れ性を向上させるものであり,含有量が0.
03重量%未満では,その効果が少なく,5.0重量%を越え
ると合金中に粗大晶出物が生成し,強度を劣化させる。
よって稀土類元素又はミッシュメタルの最も好ましい含
有量は0.03〜5.0重量%である。尚,稀土類元素として
は,La,Ce,Pr,Nd,Sm等,又,ミッシュメタルとしてはCe,
Laを主成分とする合金で,通常Ce45〜50重量%,La20〜4
0重量%,残部その他の稀土類元素(Nd,Sm,Pr等)から
なり,稀土類元素,ミッシュメタル何れも同等の効果を
示すも,稀土類元素単体は高価であり,ミッシュメタル
として添加する方が経済的に有利である。Rare earth elements or misch metals improve stress corrosion cracking resistance and weld cracking resistance.
If the content is less than 03% by weight, the effect is small, and if the content exceeds 5.0% by weight, coarse crystals are formed in the alloy and the strength is deteriorated.
Therefore, the most preferable content of the rare earth element or the misch metal is 0.03 to 5.0% by weight. La, Ce, Pr, Nd, Sm, etc. are rare earth elements, and Ce,
An alloy containing La as the main component, usually Ce45-50% by weight, La20-4
0% by weight, balance consisting of other rare earth elements (Nd, Sm, Pr, etc.). Both rare earth elements and misch metals have the same effect, but rare earth elements alone are expensive and must be added as misch metal. Is more economically advantageous.
Feは,溶接性を向上させる元素であり,含有量が0.01
重量%未満ではその効果が少なく,1.0重量%を越えて含
有させると靭性,加工性が劣化する。よって,Feの最も
好ましい含有量は0.01〜1.0重量%である。Fe is an element that improves weldability, and its content is 0.01%.
If the content is less than 1.0% by weight, the effect is small, and if the content exceeds 1.0% by weight, toughness and workability deteriorate. Therefore, the most preferable content of Fe is 0.01 to 1.0% by weight.
Tiは,組織を微細化し,溶接性を向上させる元素であ
るが,含有量が0.005重量%未満ではその効果が少なく,
0.2重量%を越えて含有させると巨大化合物が発生し靭
性,加工性が劣化する危険性がある。よって,Tiの最も
好ましい含有量は0.005〜0.2重量%である。Ti is an element that refines the structure and improves the weldability, but its effect is small when its content is less than 0.005% by weight.
If the content exceeds 0.2% by weight, a giant compound is generated, and there is a risk that toughness and workability are deteriorated. Therefore, the most preferable content of Ti is 0.005 to 0.2% by weight.
Mn,Cr,Zr,B,Moは,それぞれ組織安定化のために含有
させる元素であり,1種または2種以上添加するものであ
るが,含有量がMn0.01重量%未満,Cr0.01重量%未満,Zr
0.01重量%未満,B0.0001重量%未満,Mo0.03重量%未満
では結晶粒微細化の効果が少なくなり,また,Mn3.0重量
%,Cr0.6重量%,Zr0.25重量%,B0.08重量%,Mo0.5重量
%を越えて含有されると巨大化合物が発生し,靭性,加
工性を劣化させる危険がある。Mn, Cr, Zr, B, and Mo are elements to be contained for stabilizing the structure, and one or more of them are added. Less than wt%, Zr
If the content is less than 0.01% by weight, B is less than 0.0001% by weight, and Mo is less than 0.03% by weight, the effect of grain refinement is reduced, and Mn 3.0% by weight, Cr 0.6% by weight, Zr 0.25% by weight, B0 If the content is more than .08% by weight and 0.5% by weight of Mo, a giant compound is generated, and there is a risk of deteriorating toughness and workability.
尚本発明合金において,Si,Niは,不純物として,Si0.2
重量%未満,Ni0.03重量%未満に制限することが必要で
ある。それぞれ制限値を越えて含有されると溶接性を低
下させる。In the alloy of the present invention, Si and Ni were
It is necessary to limit to less than 0.03% by weight and less than 0.03% by weight of Ni. If the content exceeds the respective limit values, the weldability is reduced.
(実施例) 以下に本発明の一実施例について説明する。Example An example of the present invention will be described below.
第1表に示す本発明合金,比較材,及び従来合金の組
成の合金を半連続水冷鋳造装置を用いて押出用鋳塊(9
インチ径)に鋳造した。この9インチ径の棒状鋳塊を47
0℃で12時間均質化処理した後,430℃に加熱して押出機
によって,それぞれ厚さ5mm,幅100mmの平角材に押出し
た。押出加工するに際して,前記平角材が表面欠陥や割
れ発生が無く押出し得る最高押出速度をもって,各合金
の押出性の良否を評価した。その結果を第2表に示す。
各々の材料は押出後,460℃で1時間の溶体化処理後焼入
し,120℃で24時間の焼戻し処理を行った。The alloys of the present invention, the comparative material, and the conventional alloys shown in Table 1 were extruded into an ingot (9
Inch diameter). This 9-inch diameter bar-shaped ingot is 47
After homogenizing at 0 ° C for 12 hours, the mixture was heated to 430 ° C and extruded by an extruder into a rectangular piece having a thickness of 5 mm and a width of 100 mm. At the time of extrusion, the extrudability of each alloy was evaluated at the maximum extrusion speed at which the rectangular material could be extruded without surface defects or cracks. Table 2 shows the results.
Each material was extruded, quenched after solution treatment at 460 ° C. for 1 hour, and tempered at 120 ° C. for 24 hours.
このようにして製造した材料について,引張試験,応
力腐食割れ試験.及び溶接割れ試験を行った結果を第2
表に併記した。なお,試験方法を下記に示す。Tensile test, stress corrosion cracking test on the material manufactured in this way. And the results of welding crack test
Also shown in the table. The test method is shown below.
(1)加工性(押出性) (a)押出条件:鋳塊サイズ……9インチ径(219mm
φ) 押出温度……430℃ (b)押出サイズ:5mmx100mm (c)評価方法:押出速度がA7075と同等か否かにより
判定した。(1) Workability (extrusion) (a) Extrusion conditions: ingot size ... 9 inch diameter (219 mm
φ) Extrusion temperature 430 ° C. (b) Extrusion size: 5 mm × 100 mm (c) Evaluation method: Judgment was made based on whether or not the extrusion speed was equivalent to A7075.
〇……A7075の限界押出速度以上 x……A7075の限界押出速度未満 (2)引張試験 (a)試験片:JIS Z 2201の5号試験片 (b)試験方法:アムスラー万能試験機,JIS Z 2241に
基づき試験する。以上: Exceeds the limit extrusion rate of A7075 x …… Exceeds the limit extrusion rate of A7075 (2) Tensile test (a) Test piece: No. 5 test piece of JIS Z 2201 (b) Test method: Amsler universal testing machine, JIS Z Test based on 2241.
(c)測定値:引張強さ,耐力,伸びを測定し,次の基
準で判定する。(C) Measured value: Measure the tensile strength, proof stress, and elongation, and judge according to the following criteria.
〇……引張強さ55kgf/mm2以上 Δ……引張強さ50kgf/mm2以上55kgf/mm2未満 x……50kgf/mm2未満 (3)応力腐食割れ試験 (a)試験片:JIS H 8711の1号試験片 (b)試験方法:JIS H 8711に基づく。〇 ...... tensile strength of 55 kgf / mm 2 or more delta ...... tensile strength 50 kgf / mm 2 or more and less than 55kgf / mm 2 x ...... 50kgf / mm less than 2 (3) Stress corrosion cracking test (a) test piece: JIS H No. 1 test piece of 8711 (b) Test method: Based on JIS H 8711.
応力負荷…1号試験片用ジグを用いて耐力の75%を負
荷試験液,浸漬…3.5%NaCl液,交互浸漬(周期10分浸
漬,50分乾燥)30日間 (c)評価:耐応力腐食割れ発生の有無観察 x…割れ発生 〇…割れ発生せず (4)溶接割れ試験 (a)試験片:第1図に示す,フィッシュボーン形試験
片 (b)溶接条件:溶接方法……TIG 溶加材……使用せず 電極……トリウム入りタングステン棒3.2mmφ 溶接電流……180A アーク電圧……19V 溶接速度……30cm/min アルゴンガス流量……10l/min (c)割れ評価:割れ長さ測定し,次の基準で判定す
る。Stress loading: 75% of the proof stress was applied using a No. 1 test piece jig, and immersion: 3.5% NaCl solution, alternate immersion (period immersion for 10 minutes, drying for 50 minutes) for 30 days (c) Evaluation: stress corrosion resistance (4) Weld cracking test (a) Test piece: Fishbone type test piece shown in Fig. 1 (b) Welding condition: Welding method: TIG solution Additive: Not used Electrode: Thorium-containing tungsten rod 3.2 mmφ Welding current: 180 A Arc voltage: 19 V Welding speed: 30 cm / min Argon gas flow rate: 10 l / min (c) Crack evaluation: crack length Measure and judge according to the following criteria.
〇……割れ長さ30mm未満 Δ……割れ長さ30mm以上50mm未満 x……割れ長さ50mm以上 表の結果より,本発明例によるものはいずれも,押出
加工性,強度,耐応力腐食割れ性,溶接性の全てにおい
て優れていたの対し,比較合金,特にAg及び稀土類元素
又はミッシュメタルが本発明範囲外のもの及び従来合金
はいずれかの特性で劣っていた。〇: Crack length less than 30mm Δ …… Crack length 30mm or more and less than 50mm x …… Crack length 50mm or more From the results shown in the table, all of the examples according to the present invention were excellent in extrudability, strength, stress corrosion cracking resistance, and weldability, while the comparative alloys, especially Ag and rare earth elements or misch metal were excellent. Those outside the scope of the present invention and conventional alloys were inferior in any of the properties.
(発明の効果) 本発明においては,上述したところから既に理解しう
るように,溶接構造用アルミニウム合金として,従来合
金を凌ぐ高強度を有し,かつ耐応力腐食割れ性に優れて
おり,しかも押出加工,圧延加工,鍛造加工等の熱間加
工性を保有した溶接構造用アルミニウム合金を提供しう
るものであり,従来合金による場合に比べ,更に溶接構
造材としての薄肉軽量化の要請に好適に対応しうるもの
である。(Effects of the Invention) In the present invention, as can be understood from the above, as an aluminum alloy for a welded structure, it has higher strength than conventional alloys, and is excellent in stress corrosion cracking resistance. It can provide an aluminum alloy for welded structures that possesses hot workability such as extrusion, rolling, and forging, and is more suitable for requests for thinner and lighter welded structural materials than conventional alloys. It can correspond to.
第1図はフィッシュボーン形割れ試験片を示す平面図で
ある。 1……フィッシュボーン形割れ試験片 1a……溶接ビード 1b……溶接割れ 1c……割れ長さ 1d……溶接方向FIG. 1 is a plan view showing a fishbone type cracked test piece. 1 ... Fishbone type crack test piece 1a ... Weld bead 1b ... Weld crack 1c ... Crack length 1d ... Welding direction
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−118865(JP,A) 特開 昭60−5862(JP,A) 特開 昭62−250149(JP,A) 特開 昭61−238937(JP,A) 特開 昭63−96241(JP,A) (58)調査した分野(Int.Cl.6,DB名) C22C 21/00 - 21/18 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-59-118865 (JP, A) JP-A-60-5862 (JP, A) JP-A-62-250149 (JP, A) JP-A 61-118 238937 (JP, A) JP-A-63-96241 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C22C 21/00-21/18
Claims (1)
重量%を越え4.0重量%以下、Ag0.03〜1.0重量%、希土
類元素又はミッシュメタル0.03〜5.0重量%、Fe0.01〜
1.0重量%、Ti0.005〜0.2重量%を含有し、かつ、Mn0.0
1〜1.5重量%、Cr0.01〜0.6重量%、Zr0.01〜0.25重量
%、B0.0001〜0.08重量%、Mo0.03〜0.5重量%のうちの
少なくとも1種または2種以上を含み、残りアルミニウ
ム及び不可避不純物からなることを特徴とする耐応力腐
食割れ性に優れた溶接構造材用高力アルミニウム合金。1-5% by weight of Zn, 1.2-4.0% by weight of Mg, Cu1.5
More than 4.0% by weight, more than 4.0% by weight, 0.03 to 1.0% by weight of Ag, 0.03 to 5.0% by weight of rare earth element or misch metal, 0.01 to Fe%
1.0% by weight, 0.005 to 0.2% by weight of Ti
1 to 1.5% by weight, Cr 0.01 to 0.6% by weight, Zr 0.01 to 0.25% by weight, B0.0001 to 0.08% by weight, Mo at least one or more of 0.03 to 0.5% by weight, A high-strength aluminum alloy for welded structural materials having excellent resistance to stress corrosion cracking, comprising the remaining aluminum and unavoidable impurities.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11600490A JP2915490B2 (en) | 1990-05-02 | 1990-05-02 | High strength aluminum alloy for welded structural materials with excellent resistance to stress corrosion cracking |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11600490A JP2915490B2 (en) | 1990-05-02 | 1990-05-02 | High strength aluminum alloy for welded structural materials with excellent resistance to stress corrosion cracking |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0413832A JPH0413832A (en) | 1992-01-17 |
JP2915490B2 true JP2915490B2 (en) | 1999-07-05 |
Family
ID=14676455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11600490A Expired - Fee Related JP2915490B2 (en) | 1990-05-02 | 1990-05-02 | High strength aluminum alloy for welded structural materials with excellent resistance to stress corrosion cracking |
Country Status (1)
Country | Link |
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JP (1) | JP2915490B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114990395B (en) * | 2022-04-13 | 2024-01-16 | 山东南山铝业股份有限公司 | High-strength deformed aluminum alloy containing rare earth elements and preparation method thereof |
-
1990
- 1990-05-02 JP JP11600490A patent/JP2915490B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0413832A (en) | 1992-01-17 |
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