JPH0432534A - Aluminum alloy for welding excellent in stress corrosion cracking resistance - Google Patents
Aluminum alloy for welding excellent in stress corrosion cracking resistanceInfo
- Publication number
- JPH0432534A JPH0432534A JP14025790A JP14025790A JPH0432534A JP H0432534 A JPH0432534 A JP H0432534A JP 14025790 A JP14025790 A JP 14025790A JP 14025790 A JP14025790 A JP 14025790A JP H0432534 A JPH0432534 A JP H0432534A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- stress corrosion
- cracking resistance
- corrosion cracking
- strength
- 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.)
- Granted
Links
- 238000005336 cracking Methods 0.000 title claims abstract description 38
- 230000007797 corrosion Effects 0.000 title claims abstract description 29
- 238000005260 corrosion Methods 0.000 title claims abstract description 29
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 13
- 238000003466 welding Methods 0.000 title claims description 10
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910001122 Mischmetal Inorganic materials 0.000 claims abstract 2
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 150000002739 metals Chemical class 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 20
- 239000000956 alloy Substances 0.000 abstract description 20
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 229910052749 magnesium Inorganic materials 0.000 abstract description 4
- 229910052748 manganese Inorganic materials 0.000 abstract description 3
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 3
- 229910052726 zirconium Inorganic materials 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 abstract 2
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 15
- 238000012360 testing method Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 11
- 238000005242 forging Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910000914 Mn alloy Inorganic materials 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- 229910052777 Praseodymium Inorganic materials 0.000 description 2
- 229910052772 Samarium Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- UDKYUQZDRMRDOR-UHFFFAOYSA-N tungsten Chemical compound [W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W][W] UDKYUQZDRMRDOR-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
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用ＡＩ −Ｍｇ−Ｍｎ
系アルミニウム合金に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to high-strength aluminum alloys used in welded structural materials as rolled materials, extruded materials, and forged materials. AI for welding -Mg-Mn
Regarding aluminum alloys.
［従来の技術とその課題］
従来、建築・土木、自動車、車両、船舶、容器・配管、
金型等においては、中強度で加工性が良く、耐食性、溶
接性の良好なＡＩ！−Ｍｇ系合金であるＡ ５０５２や
Ａ ｌ −Ｍ ｇ −Ｍ ｎ系合金であるＡ３０８３．
５４５６等が多く使用されていた。これらの〜１ｇを主
添加元素とするアルミニウム合金は、Ｍｇ量が増加する
に従って強度は向上するが、３，５％を越えると６６°
Ｃ以上の腐食環境では応力腐食割れや剥Ｍ腐食が発生す
る危険があり、又、圧延、押出、鍛造等の熱間加工性も
劣化してくる。低Ｍｇ含有合金であるＡ ５０５２等は
応力腐食割れの心配は無いものの、強度が低いため高Ｍ
ｇ＊を合金に比べて厚い材料を使用しなければならず、
又、３．５％を越えるＭｇを含有するＡ３０８３や５４
５６合金等は応力腐食割れの懸念がある。近年、これら
の建築・土木、自動車、車両、船舶、容器・配管、金型
等の構造物は、益々薄肉軽量化へ進んでおり、それに伴
って強度が高く、しかも溶接が可能で応力腐食割れの心
配ないアルミニウム合金の要求が高まってきている。[Conventional technologies and their issues] Conventionally, architecture/civil engineering, automobiles, vehicles, ships, containers/piping,
For molds, etc., AI has medium strength, good workability, corrosion resistance, and weldability! -A5052, which is a Mg-based alloy, and A3083, which is an Al-Mg-Mn-based alloy.
5456 etc. were often used. In aluminum alloys containing ~1g of these as the main additive element, the strength improves as the Mg content increases, but when it exceeds 3.5%, the strength decreases to 66°.
In a corrosive environment of C or higher, there is a risk of stress corrosion cracking and exfoliation corrosion, and hot workability in rolling, extrusion, forging, etc. also deteriorates. Low Mg containing alloys such as A 5052 do not have to worry about stress corrosion cracking, but their low strength makes it difficult to use high Mg alloys.
g* must be made of a thicker material than the alloy,
In addition, A3083 and 54 containing more than 3.5% Mg
56 alloy etc., there is a concern about stress corrosion cracking. In recent years, structures such as architecture/civil engineering, automobiles, vehicles, ships, containers/pipes, molds, etc. have become increasingly thin and lightweight, and as a result, they have become stronger, can be welded, and are less prone to stress corrosion cracking. There is an increasing demand for aluminum alloys that do not have to worry about.
しかし、上記のごと〈従来の技術では薄肉化へ対応でき
る強度、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。However, as mentioned above, conventional technology has been able to satisfy all aspects of strength, stress corrosion cracking resistance, and weldability to accommodate thinning walls, and it also has excellent formability through extrusion, rolling, forging, etc. Obtaining the alloy was extremely difficult.
本発明は、従来の技術では解決できなかった。 The present invention cannot be solved using conventional techniques.
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１押出、圧延、鍛造等の成形性にも優れた
材料を提供することを目的とするものである。The purpose is to provide a material that is satisfactory in all aspects of strength, stress corrosion cracking resistance, and weldability, and also has excellent formability in extrusion, rolling, forging, etc.
〔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１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。[Means for Solving the Problem] The present inventors have focused on the above-mentioned circumstances, and have developed a method that satisfies all aspects of strength, stress corrosion cracking resistance, and weldability as described above, and furthermore, Extrusion, rolling.
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１合金成分の種類、含有率を変えて。In order to develop an aluminum alloy with excellent formability during forging, etc., we changed the type and content of one alloy component.
種々検討した６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１本発明の完成をみた。As a result of various studies, it was found that the above object could be achieved by specifying the type and content of the alloy components as described below, and the present invention was completed.
即ち３本発明に係る耐応力腐食割れに優れる溶接用アル
ミニウム合金の構成とは、Ｍｇ３．０〜６．０重量％、
Ｍｎ０．３２〜１．５重量％、Ｃｒ ０．０３〜０．５
重量％、Ｃｕ０．０３〜１．０重量％、Ｆｅ＋Ｓｉ０．
１〜１．５重量％１かつＦｅ／Ｓ ｊ＞２を必須成分と
し、さらにＴ ｉ ０．００５〜０．２重量％、Ｂ０．
０００１〜０．０８重量％、Ｚ ｒ ０．０１〜０．２
５重１％、Ｍ ｏ ０．０３〜０．５重量％、Ｖ０．０
１〜０．２重量％、希土類元素又はミツシュメタル０．
０３〜５．０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り、また、他の発明は、Ｍｇ３．０
〜６，０重量％、Ｍ ｎ ０．３２〜１．５重量％、Ｃ
ｒ ０．０３〜０．５重蛍％１Ｃｕ０．０３〜１．０重
量％、Ａｇ０．０３〜１．０重量％、Ｆ ｅ 十Ｓ ｉ
０．１〜１．５重量％でかっＦｅ／Ｓｉ＞２を必須成分
とし、さらに、Ｔ ｉ ０．００５〜０．２重量％、Ｂ
０．０００１〜０．０８重量％、Ｚ ｒ ０．０１〜
０．２５重量％、Ｍ ｏ ０．０３〜０．５重量％、Ｖ
０．０１〜０．２重量％、希土類元素又はミツシュメタ
ル０．０３〜５．０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 aluminum alloy for welding which is excellent in stress corrosion cracking resistance according to the present invention is 3.0 to 6.0% by weight of Mg,
Mn 0.32-1.5% by weight, Cr 0.03-0.5
% by weight, Cu0.03-1.0% by weight, Fe+Si0.
1 to 1.5% by weight 1 and Fe/S j>2 as essential components, furthermore Ti 0.005 to 0.2% by weight, B0.
0001-0.08% by weight, Z r 0.01-0.2
5 weight 1%, Mo 0.03-0.5 weight%, V0.0
1-0.2% by weight, rare earth elements or Mitsushmetal 0.
03 to 5.0% by weight, and the remainder consists of aluminum and unavoidable impurities.
~6.0% by weight, Mn 0.32-1.5% by weight, C
r 0.03-0.5 double fluorescent % 1 Cu 0.03-1.0 weight %, Ag 0.03-1.0 weight %, Fe 10 Si
0.1-1.5% by weight, Fe/Si>2 as an essential component, furthermore, Ti 0.005-0.2% by weight, B
0.0001-0.08% by weight, Z r 0.01-
0.25% by weight, Mo 0.03-0.5% by weight, V
The gist is that it contains at least one or two or more of 0.01 to 0.2% by weight, rare earth elements or 0.03 to 5.0% by weight of Mitsushi metal, and the remainder consists of aluminum and inevitable impurities.
すなわち本発明は１．ｌｅ−Ｍｇ−Ｍｎ系合金のＦｅと
Ｓｉの量と割合を調整し、Ｃｕを添加することにより耐
溶接割れ性、耐応力腐食割れ性を向上し、強度を高めた
ものであり、また他の発明は、ＡＡ−Ｍｇ−Ｍｎ系合金
のＦｅとＳｔＯ量と割合を調整し、Ａｇ及びＣｕを添加
することにより耐溶接割れ性、耐応力腐食割れ性を向上
し、強度を高めたものである。That is, the present invention has 1. By adjusting the amount and ratio of Fe and Si in the le-Mg-Mn alloy and adding Cu, the weld cracking resistance and stress corrosion cracking resistance are improved, and the strength is increased. The invention improves weld cracking resistance, stress corrosion cracking resistance, and strength by adjusting the amounts and ratios of Fe and StO in the AA-Mg-Mn alloy and adding Ag and Cu. .
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。The reasons for limiting the types and contents of the components of the aluminum alloy according to the present invention are as follows.
Ｍｇは、強度向上に不可欠な元素であり、含有量が３．
０重量％未満では充分な強度が得られず、６．０重量％
を越えて含有されると耐応力腐食υ］れ性、加工性が極
変に劣化し、微量添加元素による改善は難しい。よって
、Ｍｇの最も好ましい含有量は３．０〜６．０重量％で
ある。Mg is an essential element for improving strength, and the content is 3.
If it is less than 0% by weight, sufficient strength cannot be obtained;
If the content exceeds υ, the stress corrosion resistance and workability will deteriorate significantly, and it is difficult to improve them by adding trace amounts of elements. Therefore, the most preferable Mg content is 3.0 to 6.0% by weight.
Ｍｎは、Ｍｇと同様に強度向上に不可欠な元素であり、
また、耐応力腐食割れ性を向上させる元素であり、含有
量が０．３２重量％未満ではその効果が少なく、１．５
重量％を越えて含有させると加工性、溶接性が劣化する
。よってＭｎの最も好ましい含有量は０．３２〜１．５
重量％である。Like Mg, Mn is an essential element for improving strength.
It is also an element that improves stress corrosion cracking resistance, and if the content is less than 0.32% by weight, the effect will be small;
If the content exceeds % by weight, workability and weldability will deteriorate. Therefore, the most preferable Mn content is 0.32 to 1.5
Weight%.
Ｃｒは、強度や耐応力腐食割れ性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
、０．５重量％を越えて含有されると加工性や靭性を劣
化させる。よってＣｒの好ましい含有量は０．０３〜０
．５重量％である。Cr is an element that improves strength and stress corrosion cracking resistance. If the content is less than 0.03% by weight, the effect will be small, and if the content exceeds 0.5% by weight, it will deteriorate workability and toughness. let Therefore, the preferable content of Cr is 0.03 to 0.
．． It is 5% by weight.
Ｃｕは、耐応力腐食割れ性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％を越えて含有されると溶接性が劣化する。よっ
て、Ｃｕの最も好ましい含有量は０．０３〜１．０重量
％である。Cu is an element that improves stress corrosion cracking resistance, and if the content is less than 0.03% by weight, the effect is small;
If the content exceeds 0% by weight, weldability will deteriorate. Therefore, the most preferable content of Cu is 0.03 to 1.0% by weight.
ＦｅとＳｔは、溶接性を向上させる元素であるが、含有
量がＦｅ＋Ｓｔとして０．１重量％未満ではその効果が
少なく、１．５重量％を越えて含有されると靭性、加工
性が劣化する。また、Ｆ ｅ ／ Ｓｉ比が２未満では
溶接性を向上させる効果が少ない。よって、ＦｅとＳｉ
の最も好ましい含有量はＦ ｅ ＋ Ｓ ｉ０．１〜１
．５重量％１かつＦｅ＋Ｓｉ２である。Fe and St are elements that improve weldability, but if the content is less than 0.1% by weight as Fe + St, the effect is small, and if it is contained in excess of 1.5% by weight, toughness and workability deteriorate. do. Further, if the Fe/Si ratio is less than 2, the effect of improving weldability is small. Therefore, Fe and Si
The most preferable content of Fe + Si0.1-1
．． 5% by weight 1 and Fe+Si2.
Ｔｉ、Ｂは、組織を微細化し、溶接性を向上させる元素
であり、各々単独で添加しても効果はあるが、両方を同
時に添加した方が効果が大きい。Ti and B are elements that refine the structure and improve weldability, and although each is effective when added alone, it is more effective when both are added at the same time.
しかし、含有量がＴｉ０．００５重量１未満、Ｂ１０．
０００１重量％未満ではその効果が少なく、Ｔｉ０．２
重量％、８０．０８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％であり、Ｂの最も好ましい含有量は０．０００１
〜０．０８重量％である。However, the content of Ti is less than 0.005 weight 1, B10.
If it is less than 0.0001% by weight, the effect is small, and Ti0.2
If the content exceeds 80.08% by weight, there is a risk that giant compounds will be generated and the toughness and workability will deteriorate. Therefore, the most preferable content of Ti is 0.005 to 0.2
% by weight, and the most preferable content of B is 0.0001
~0.08% by weight.
■は、耐応力腐食割れ性、耐溶接割れ性を改善する元素
であり、含有量が０．０１重量％未満ではその効果が少
なく、０．２重量％を越えて含有させると靭性が劣化す
る。よってＶの好ましい含有量は０．０１〜０．２重量
％である。■ is an element that improves stress corrosion cracking resistance and weld cracking resistance; if the content is less than 0.01% by weight, the effect will be small, and if the content exceeds 0.2% by weight, the toughness will deteriorate. . Therefore, the preferable content of V is 0.01 to 0.2% by weight.
希土類元素又はミツシュメタルは、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０．０
３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２強度を劣化させる
。よって稀土類元素又はミツ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、ＬａＣｅ、Ｐｒ、Ｎｄ、Ｓｍ等、又、ミツ
シュメタルとしてはＣｅ、Ｌａを主成分とする合金で９
通常Ｃｅ４５〜５０重量％、 Ｌ ａ ２０〜４０重
量％、残部その他の稀土類元素（Ｎｄ、Ｓｍ、Ｐｒ等）
からなり。Rare earth elements or Mitsushi metals improve stress corrosion cracking resistance and weld cracking resistance, and the content is 0.0.
If it is less than 3% by weight, the effect will be small, and if it exceeds 5.0% by weight, coarse crystallized substances will be formed in the alloy, deteriorating the strength. Therefore, the most preferable content of rare earth elements or metal is 0.03 to 5.0% by weight. Rare earth elements include LaCe, Pr, Nd, Sm, etc., and Mitsushi metals include alloys mainly composed of Ce and La.
Usually Ce 45-50% by weight, La 20-40% by weight, balance other rare earth elements (Nd, Sm, Pr, etc.)
It consists of
稀土類元素、ミッシュメタルいず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。Although both rare earth elements and misch metals exhibit similar effects, rare earth elements alone are expensive, and it is economically advantageous to add them as misch metals.
Ｚｒ、Ｍｏは、それぞれ組織を安定化させ、溶接割れを
防止するために含有させる元素であり、含有量がＺｒ０
．０１重量％、Ｍ ｏ ０．０３重量％未満では結晶粒
微細化の効果が少なく、割れ防止に効果がなく、また、
Ｚｒ０．２５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。したがって好ましい範囲はＺ ｒ ０．０
１〜０．２５重量％、Ｍｏ０．０３〜０．５重量％であ
る。Zr and Mo are elements contained to stabilize the structure and prevent weld cracking, respectively, and the content is Zr0.
．． If Mo is less than 0.01% by weight and Mo is less than 0.03% by weight, the effect of grain refining is small and there is no effect in preventing cracking.
If the content exceeds 0.25% by weight of Zr and 0.5% by weight of Mo, there is a risk that giant compounds will be generated and the toughness and workability will deteriorate. Therefore, the preferred range is Z r 0.0
1 to 0.25% by weight, and Mo 0.03 to 0.5% by weight.
また他の発明に添加される、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。In addition, Ag, which is added in other inventions, is an element that improves stress corrosion cracking resistance and strength, and if the content is less than 0.03% by weight, the effect is small, and if the content is more than 1.0% by weight, the effect is small. If this happens, weldability will deteriorate.
よってＡｇの最も好ましい含有量は０．０３〜１．０重
量％である。その他の成分は上記と同様の作用をなすも
のである。Therefore, the most preferable content of Ag is 0.03 to 1.0% by weight. The other components have the same functions as above.
以下に本発明の一実施例について説明する。 An embodiment of the present invention will be described below.
第１表及び第２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。Alloys having the compositions of the present alloy, comparative material, and conventional alloy shown in Tables 1 and 2 were cast into extrusion ingots (9 inch diameter) using a semi-continuous water-cooled casting device.
この９インチ径の棒状鋳塊を５３０’Ｃで１２時間均質
化処理した後、４５０°Ｃに加熱して押出機によって、
それぞれ厚さ５皿、幅１００薗の平角材に押出した。After homogenizing this 9-inch diameter rod-shaped ingot at 530'C for 12 hours, it was heated to 450°C and processed by an extruder.
Each piece was extruded into a rectangular piece with a thickness of 5 plates and a width of 100 plates.
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、１％以下の弓張整直を行い矯正した。During extrusion processing, the extrudability of each alloy was evaluated using the maximum extrusion speed at which the rectangular material could be extruded without surface defects or cracks. The results are shown in Table 2. After extrusion, each material was corrected by straightening the arch to 1% or less.
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３表
および第４表に併記した。なお、試験方法を下記に示す
。Tables 3 and 4 show the results of tensile tests, stress corrosion cracking tests, and weld cracking tests on the materials produced in this manner. The test method is shown below.
〔試験方法）
（１）加工性（押出性）
（ａ）押出条件 ：鋳塊サイズ−・・・−・ ９インチ
径（２１９ａ＋ｍφ）
押出温度−−−−−−一・・・・・４５０℃（ｂ）押出
サイズ： ５ｍｍＸ １００ｍｍ（ｃ）評価方法 ：押
出速度が５４５６と同等か否かにより判定した。[Test method] (1) Workability (extrudability) (a) Extrusion conditions: Ingot size: 9 inch diameter (219a+mφ) Extrusion temperature: 450°C (b) Extrusion size: 5 mm x 100 mm (c) Evaluation method: Judgment was made based on whether the extrusion speed was equivalent to 5456.
○−５４５６の限界押出
速度と同等又はそれ以上
×−・５４５６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。○-Equivalent to or higher than the limit extrusion speed of 5456 ×-Less than the limit extrusion speed of 5456 (2) Tensile test (a) Test piece: JIS Z 2201 No. 5 test piece (b) Test method: Amsler universal testing machine .
ＪＩＳ Ｚ ２２４１に基づき試験する。Test based on JIS Z 2241.
（ｃ）測定値 ；引張強さ、耐力、伸びを測定し３次
の基準で判定する。(c) Measured values; Tensile strength, yield strength, and elongation are measured and judged based on tertiary criteria.
０−−一引張強さ３０ ｋｇｆ／ｍｍ”以上×・−引張
強さ３０ ｋｇｆ／ｍｍ”未満（３）応力腐食割れ試験
（ａ）試験片
（ｂ）試験方法
（Ｃ）評価
： ＪＩＳ Ｈ８７１１の１号試験片
： ＪＴＳ Ｈ８７１１に基づく。0--Tensile strength 30 kgf/mm" or more x - Tensile strength less than 30 kgf/mm" (3) Stress corrosion cracking test (a) Test piece (b) Test method (C) Evaluation: JIS H8711 No. 1 test piece: Based on JTS H8711.
増感処理−１８０’ＣＸ １０００ 時間加熱 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−３，５ｘＮａＣ１液、 交互浸漬（周期１０分浸漬。Sensitization treatment-180’CX 1000 time heating Stress load - jig for No. 1 test piece Load 75% of proof stress using Test solution, immersion - 3,5x NaCl solution, Alternate immersion (10 minute immersion cycle).
５０分乾燥）３０日間
：応力腐食割れ発生の有無観察
×−・−割れ発生
０−一一割れ発生せず
（４）溶接割れ試験
（ａ）試験片 ：第１回に示す、フィッシュボーン形
試験片
（ｂ）溶接条件 ：溶接方法−一−−−・・ＴＩＧ溶加
材−一−−−−−−−−−−使用せず電極−・−・−・
−一−−−−・ トリウム入りタングステン棒、 ３．
２ｍｍφ
溶接電流−・・−１８０Ａ
（ｃ）割れ評価
アーク電圧−１９Ｖ
溶接速度−−−−３０ｃｍ／ｍｉｎ
アルゴンガス流量−１０４２／■ｌ口
：割れ長さ測定し１次の基準
で判定する。50 minutes drying) 30 days: Observation of occurrence of stress corrosion cracking x - - Cracking 0-11 No cracking (4) Weld cracking test (a) Test piece: Fishbone type test shown in Part 1 Piece (b) Welding conditions: Welding method - 1 - TIG filler metal - 1 - No electrode used - - -
−1−−−−・Tungsten rod containing thorium, 3.
2mmφ Welding current: -180A (c) Crack evaluation Arc voltage: -19V Welding speed: 30cm/min Argon gas flow rate: -1042/■l Port: Measure the crack length and judge based on the primary criteria.
Ｏ−・割れ長さ３Ｑｍｍ未満 ×−割れ長さ３０＋＋＋ｍ以上 第３表 第４表 表の結果より９本発明例によるものはいずれも。O-・Crack length less than 3Qmm ×-Crack length 30+++m or more Table 3 Table 4 From the results in the table, all 9 according to the present invention examples.
押出加工性１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に対し、比較合金、特にＦ ｅ、Ｓ
ｉ、、Ｃｕ、Ａｇなど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。The extrusion processability 1 was excellent in all strength, stress corrosion cracking resistance, and weldability, whereas the comparative alloys, especially Fe and S
Those with i, Cu, Ag, etc. outside the range of the present invention and conventional alloys were inferior in some 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
を凌ぐ強度、耐溶接割れ性を有し５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] As can be understood from the above, in the present invention, as an aluminum alloy for welded structures, it has strength and weld cracking resistance superior to conventional alloys, and has excellent stress corrosion cracking resistance. Moreover, it is possible to provide an aluminum alloy for welded structures that has hot workability such as extrusion processing, rolling processing, and forging processing, compared to conventional alloys.
Furthermore, it can suitably meet the demand for thinner and lighter welded structural materials.
第１図はフィン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
１ ｂ ・
溶接割れ
１０−・・割れ長さ
１ｄ −・・溶接方向FIG. 1 is a plan view showing a Finschborn crack test piece. 1-Fishbone type crack test piece 1a ~ Weld bead 1b ・Weld crack 10-...Crack length 1d--Welding direction
Claims (2)
５重量％、Ｃｒ０．０３〜０．５重量％、Ｃｕ０．０３
〜１．０重量％、Ｆｅ＋Ｓｉ０．１〜１．５重量％でか
つＦｅ／Ｓｉ＞２を必須成分とし、さらにＴｉ０．００
５〜０．２重量％、Ｂ０．０００１〜０．０８重量％、
Ｚｒ０．０１〜０．２５重量％、Ｍｏ０．０３〜０．５
重量％、Ｖ０．０１〜０．２重量％、希土類元素又はミ
ッシュメタル０．０３〜５．０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
に優れた溶接用アルミニウム合金。(1) Mg3.0-6.0% by weight, Mn0.32-1.
5% by weight, Cr0.03-0.5% by weight, Cu0.03
~1.0% by weight, 0.1 to 1.5% by weight of Fe+Si, with Fe/Si>2 as an essential component, and 0.00% of Ti.
5 to 0.2% by weight, B0.0001 to 0.08% by weight,
Zr0.01-0.25% by weight, Mo0.03-0.5
% by weight, V 0.01 to 0.2% by weight, and at least one or more of rare earth elements or misch metals 0.03 to 5.0% by weight, with the remainder consisting of aluminum and inevitable impurities. An aluminum alloy for welding with excellent stress corrosion cracking resistance.
５重量％、Ｃｒ０．０３〜０．５重量％、Ｃｕ０．０３
〜１．０重量％、Ａｇ０．０３〜１．０重量％、Ｆｅ＋
Ｓｉ０．１〜１．５重量％でかつＦｅ／Ｓｉ＞２を必須
成分とし、さらに、Ｔｉ０．００５〜０．２重量％、Ｂ
０．０００１〜０．０８重量％、Ｚｒ０．０１〜０．２
５重量％、Ｍｏ０．０３〜０．５重量％、Ｖ０．０１〜
０．２重量％、希土類元素又はミッシュメタル０．０３
〜５．０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用アルミ
ニウム合金。(2) Mg3.0-6.0% by weight, Mn0.32-1.
5% by weight, Cr0.03-0.5% by weight, Cu0.03
~1.0% by weight, Ag0.03-1.0% by weight, Fe+
0.1-1.5% by weight of Si and Fe/Si>2 as essential components, furthermore, 0.005-0.2% by weight of Ti, B
0.0001-0.08% by weight, Zr0.01-0.2
5% by weight, Mo0.03-0.5% by weight, V0.01-
0.2% by weight, rare earth element or misch metal 0.03
An aluminum alloy for welding having excellent stress corrosion cracking resistance, characterized in that it contains at least one or two or more of the following: ~5.0% by weight, with the remainder consisting of aluminum and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14025790A JP2915497B2 (en) | 1990-05-30 | 1990-05-30 | Aluminum alloy for welding with excellent stress corrosion cracking resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14025790A JP2915497B2 (en) | 1990-05-30 | 1990-05-30 | Aluminum alloy for welding with excellent stress corrosion cracking resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0432534A true JPH0432534A (en) | 1992-02-04 |
| JP2915497B2 JP2915497B2 (en) | 1999-07-05 |
Family
ID=15264580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14025790A Expired - Fee Related JP2915497B2 (en) | 1990-05-30 | 1990-05-30 | Aluminum alloy for welding with excellent stress corrosion cracking resistance |
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| Country | Link |
|---|---|
| JP (1) | JP2915497B2 (en) |
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|---|---|---|---|---|
| US20150132181A1 (en) * | 2013-11-11 | 2015-05-14 | Stephen L. Anderson | Aluminum welding filler metal, casting and wrought metal alloy |
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1990
- 1990-05-30 JP JP14025790A patent/JP2915497B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JP2915497B2 (en) | 1999-07-05 |
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