JP2667636B2 - Molten flux for submerged arc welding - Google Patents
Molten flux for submerged arc weldingInfo
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- JP2667636B2 JP2667636B2 JP10007694A JP10007694A JP2667636B2 JP 2667636 B2 JP2667636 B2 JP 2667636B2 JP 10007694 A JP10007694 A JP 10007694A JP 10007694 A JP10007694 A JP 10007694A JP 2667636 B2 JP2667636 B2 JP 2667636B2
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Description
【０００１】[0001]
【産業上の利用分野】本発明は大電流域でのサブマージ
アーク溶接において、溶接作業性が良好であると共に、
靱性が優れた溶接金属を得ることができるサブマージア
ーク溶接用溶融型フラックスに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides good welding workability in submerged arc welding in a large current range.
The present invention relates to a molten type flux for submerged arc welding, which can obtain a weld metal having excellent toughness.
【０００２】[0002]
【従来の技術】サブマージアーク溶接は、能率が高く、
安定した溶接作業性及び溶接性能が得られることから、
広い分野で使用されている。近年、このサブマージアー
ク溶接においては、溶接能率を向上させるために、大電
流化及び高速化が図られている。特に、大電流で溶接が
可能になれば、溶接に要するパス数が低減されて工程の
省略が可能になるという利点がある。2. Description of the Related Art Submerged arc welding is highly efficient.
Because stable welding workability and welding performance are obtained,
Used in a wide range of fields. In recent years, in this submerged arc welding, in order to improve welding efficiency, large current and high speed have been achieved. Particularly, if welding can be performed with a large current, there is an advantage that the number of passes required for welding can be reduced and the process can be omitted.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来、
サブマージアーク溶接において、大電流で溶接すること
はできなかった。この大電流化を阻害している要因の主
なものは、ビード外観の乱れ等による溶接作業性の低下
と靱性の劣化である。However, conventionally,
In submerged arc welding, welding could not be performed with a large current. The main factors that hinder this increase in current are the deterioration of welding workability and the deterioration of toughness due to disturbance of the bead appearance and the like.
【０００４】大電流における溶接作業性の低下を改善し
たフラックスとして、特公平５−９１９７号等に開示さ
れたものがあるが、これは主として下向きすみ肉溶接時
の作業性を改善したものであり、突合せ溶接時の大電流
適用においてはビードの蛇行等が目立ち、ビード外観に
ついては必ずしも満足できるものではなかった。[0004] As a flux which has improved the deterioration of the welding workability at a large current, there is a flux disclosed in Japanese Patent Publication No. 5-9197 and the like, which mainly improves the workability during downward fillet welding. When a high current was applied during butt welding, meandering of the bead was noticeable, and the bead appearance was not always satisfactory.
【０００５】本発明はかかる問題点に鑑みてなされたも
のであって、溶接品質を劣化させることなく、大電流に
よる溶接を可能とし、溶接作業性及び溶接能率を向上さ
せることができるサブマージアーク溶接用溶融型フラッ
クスを提供することを目的とする。[0005] The present invention has been made in view of the above problems, and it is a submerged arc welding method capable of performing welding with a large current without deteriorating welding quality and improving welding workability and welding efficiency. It is an object of the present invention to provide a molten flux for use.
【０００６】[0006]
【課題を解決するための手段】本発明に係るサブマージ
アーク溶接用溶融型フラックスは、ＳｉＯ2；４５乃至
５５重量％、ＣａＯ；０．５乃至５重量％、ＣａＦ2；
３乃至１０重量％、Ｍｎ０；１５乃至２２重量％、Ｍｇ
Ｏ；１０乃至２０重量％、ＴｉＯ2；１乃至１０重量
％、Ａｌ2Ｏ3；０．５乃至４重量％、Ｎａ2Ｏ及び／又
はＫ2Ｏ；０．０５乃至５重量％を含有し、ＳｉＯ2／
（ＣａＦ2；＋Ａｌ2Ｏ3）；３．５乃至１０であると共
に、残部は微量成分及び不可避的不純物からなることを
特徴とする。The molten flux for submerged arc welding according to the present invention is composed of 45 to 55% by weight of SiO 2 , 0.5 to 5% by weight of CaO, and CaF 2 ;
3 to 10% by weight, Mn0; 15 to 22% by weight, Mg
O; 10 to 20 wt%, TiO 2; 1 to 10 wt%, Al 2 O 3; 0.5 to 4 wt%, Na 2 O and / or K 2 O; 0.05 to contain 5 wt% , SiO 2 /
(CaF 2 ; + Al 2 O 3 ); 3.5 to 10, with the balance being trace components and unavoidable impurities.
【０００７】なお、必要に応じて、ＰｂＯ及び／又はＢ
ｉ2Ｏ3；０．０１乃至０．２重量％を含有してもよい。[0007] If necessary, PbO and / or B
i 2 O 3 ; 0.01 to 0.2% by weight.
【０００８】[0008]
【作用】本願発明者等は、大電流による溶接を可能にす
るフラックスを開発すべく種々実験研究を繰り返した結
果、突合せ溶接の大電流域で良好な作業性を得るために
は、Ａｌ2Ｏ3を低減すればよいことを見い出した。この
Ａｌ2Ｏ3は、従来、良好な作業性を確保するために必須
の添加成分であるとされていたものである。例えば、特
開昭６０−１８７４９５においては、Ａｌ2Ｏ3は溶接金
属の酸素量を大きく増大させずにスラグ粘性を高め、光
沢がある良好なすみ肉ビード形成に寄与すると記載され
ている。このため、この公報に記載の実施例は、４．０
重量％以上のＡｌ2Ｏ3を含有し、平均値で７．４％のＡ
ｌ2Ｏ3を含有する。しかし、本願発明においては、大電
流における溶接作業性を改善するために、Ａｌ2Ｏ3成分
を低く制限することを特徴とする。The present inventors have repeatedly conducted various experimental studies to develop a flux capable of welding with a large current. As a result, in order to obtain good workability in a large current range of butt welding, Al 2 O was required. We found that it was only necessary to reduce 3 . This Al 2 O 3 has hitherto been considered to be an essential additive component for ensuring good workability. For example, Japanese Patent Application Laid-Open No. 60-187495 describes that Al 2 O 3 increases the slag viscosity without greatly increasing the oxygen content of the weld metal, and contributes to forming a glossy and good fillet bead. Therefore, the embodiment described in this publication is 4.0
% Of Al 2 O 3 , and 7.4% of A on average
Contains l 2 O 3 . However, the present invention is characterized in that the Al 2 O 3 component is restricted to a low level in order to improve the welding workability at a large current.
【０００９】また、本発明においては、ＳｉＯ2量と、
ＣａＦ2及びＡｌ2Ｏ3の合計量との比率に着目し、この
比ＳｉＯ2／（ＣａＦ2＋Ａｌ2Ｏ3）を適切に設定するこ
とにより、大電流使用においても、溶接金属の靱性の劣
化がないことを見い出した。そこで、本発明の他の特徴
は、大電流における靱性の劣化を防止するために、Ｓｉ
Ｏ2／（ＣａＦ2＋Ａｌ2Ｏ3）を適切な範囲に設定するこ
とにある。In the present invention, the amount of SiO 2 and
By paying attention to the ratio to the total amount of CaF 2 and Al 2 O 3 and appropriately setting this ratio SiO 2 / (CaF 2 + Al 2 O 3 ), the toughness of the weld metal is deteriorated even when a large current is used. I found nothing. Therefore, another feature of the present invention is that Si is used in order to prevent deterioration of toughness at a large current.
It is to set O 2 / (CaF 2 + Al 2 O 3 ) in an appropriate range.
【００１０】以下、本発明のフラックスの各成分の添加
理由及び組成限定理由について説明する。ＳｉＯ2；４５乃至５５重量％ ＳｉＯ2は酸性成分であって、スラグの融点及び粘性を
調整するのに有効な成分である。ＳｉＯ2の含有量が４
５重量％未満であると、溶融スラグの粘度が不足し、ビ
ードの蛇行及びアンダーカットの発生原因となる、一
方、ＳｉＯ2の含有量が５５重量％を超えると、フラッ
クスの塩基度が低下し、溶融金属中の酸素量が増加して
靱性が劣化する他、スラグ剥離性も悪くなる。大電流で
の作業性を考慮すると、ＳｉＯ2のより好ましい範囲は
４６乃至５２重量％である。The reasons for adding the respective components of the flux of the present invention and the reasons for limiting the composition will be described below. SiO 2 ; 45 to 55 wt% SiO 2 is an acidic component and is an effective component for adjusting the melting point and viscosity of the slag. 4 content of SiO 2
If the content is less than 5% by weight, the viscosity of the molten slag is insufficient, causing meandering and undercut of the bead. On the other hand, if the content of SiO 2 exceeds 55% by weight, the basicity of the flux decreases. In addition, the amount of oxygen in the molten metal increases and the toughness deteriorates, and the slag removability also deteriorates. Considering workability at a large current, a more preferable range of SiO 2 is 46 to 52% by weight.
【００１１】ＣａＯ；０．５乃至５重量％ ＣａＯは塩基性成分であってスラグの塩基度、粘性及び
融点を調整するのに有効な成分である。ＣａＯの含有量
が０．５重量％未満であると、塩基度が不足するばかり
でなく、スラグの粘度が低下するため、ビードの蛇行が
生じやすくなる。一方、ＣａＯの含有量が５重量％を超
えると、スラグ剥離性が悪化する。 CaO: 0.5 to 5% by weight CaO is a basic component and is an effective component for adjusting the basicity, viscosity and melting point of slag. When the content of CaO is less than 0.5% by weight, not only the basicity is insufficient, but also the viscosity of the slag is reduced, so that the bead tends to meander. On the other hand, when the content of CaO exceeds 5% by weight, the slag removability deteriorates.
【００１２】ＣａＦ2；３乃至１０重量％ ＣａＦ2は塩基性の成分であり、スラグの融点及び流動
性を調整するのに有効な成分でもある。更に、ＣａＦ2
は溶接金属の酸素及び窒素の含有量の低減に極めて有効
な成分である。ＣａＦ2の含有量が３重量％未満である
と、上記効果が有効に発揮されず、特に溶接金属中の酸
素量が増加して靱性不足となる。一方、ＣａＦ2の含有
量が１０重量％を超えると、スラグ巻き込みが著しくな
り、スラグ剥離性が悪くなる他、ポックマークも発生し
やすくなる。 CaF 2 ; 3 to 10% by weight CaF 2 is a basic component and also a component effective for adjusting the melting point and fluidity of slag. Furthermore, CaF 2
Is a very effective component for reducing the oxygen and nitrogen contents of the weld metal. If the content of CaF 2 is less than 3% by weight, the above effect is not effectively exhibited, and particularly, the oxygen content in the weld metal increases, resulting in insufficient toughness. On the other hand, when the content of CaF 2 exceeds 10% by weight, slag entrainment becomes remarkable, slag removability is deteriorated, and pock marks are easily generated.
【００１３】ＭｎＯ：１５乃至２２重量％ Ｍｎ０はスラグの融点及び粘性を調整するのに有効な成
分である。ＭｎＯの含有量が１５重量％未満ではスラグ
−メタル間の界面張力が過大となり、スラグが焼付いた
り、又はアンダーカットが発生しやすくなる。一方、Ｍ
ｎＯの含有量が２２重量％を超えると、溶融金属中の酸
素量が増加して靱性が低下し、またビードが蛇行し易く
なる。 MnO: 15 to 22 wt% Mn0 is an effective component for adjusting the melting point and viscosity of the slag. When the content of MnO is less than 15% by weight, the interfacial tension between the slag and the metal becomes excessive, and the slag tends to seize or undercut. On the other hand, M
When the content of nO exceeds 22% by weight, the amount of oxygen in the molten metal increases, the toughness decreases, and the bead tends to meander.
【００１４】ＭｇＯ：１０乃至２０重量％ ＭｇＯは塩基性成分として、溶融金属中の酸素量を低減
する効果があり、また粘性調整剤としての作用も有して
いる。ＭｇＯの含有量が１０重量％未満であると、溶融
金属中の酸素量の低減効果を十分発揮し得ず、また粘度
不足によりビードが蛇行し易くなる。一方、ＭｇＯが２
０重量％を超えると、耐吸湿性が劣化し、ポツクマーク
が発生しやすくなる他、スラグ剥離性も悪くなる。 MgO: 10 to 20% by weight MgO, as a basic component, has an effect of reducing the amount of oxygen in the molten metal, and also has a function as a viscosity modifier. If the content of MgO is less than 10% by weight, the effect of reducing the amount of oxygen in the molten metal cannot be sufficiently exhibited, and the bead tends to meander due to insufficient viscosity. On the other hand, MgO is 2
If it exceeds 0% by weight, the moisture absorption resistance is deteriorated, and a pock mark is likely to be generated, and the slag removability is deteriorated.
【００１５】Ｔｉ０2：１乃至１０重量％ ＴｉＯ2は酸性成分であって、スラグの融点及び粘性調
整剤として有効である。更に、ＴｉＯ2は溶融時に還元
されて溶融金属中にＴｉとして歩留まり、溶接金属の衝
撃性能の向上に役立つ。ＴｉＯ2の含有量が１重量％未
満であると、溶接金属中に供給されるＴｉ量が不足し、
溶融金属の耐衝撃性能が低下する。一方、ＴｉＯ2が１
０重量％を超えると、スラグ焼付の原因となるＣａ０・
ＴｉＯ2が析出するようになり、スラグ剥離性が急激に
劣化する。TiO 2 : 1 to 10 wt% TiO 2 is an acidic component and is effective as a slag melting point and viscosity modifier. Furthermore, TiO 2 is reduced during melting and is retained as Ti in the molten metal, which helps improve the impact performance of the weld metal. If the content of TiO 2 is less than 1% by weight, the amount of Ti supplied to the weld metal becomes insufficient,
The impact resistance of the molten metal decreases. On the other hand, if TiO 2 is 1
If it exceeds 0% by weight, Ca0.
TiO 2 begins to precipitate, and the slag releasability deteriorates rapidly.
【００１６】Ａｌ2Ｏ3；０．５乃至４重量％ Ａｌ2Ｏ3は中性成分であり、スラグの塩基度の低下をで
きるだけ抑えてスラグの融点及び粘性を調整するのに有
効な成分である。従来のフラックスでは良好な溶接作業
性を得るために多量のＡｌ2Ｏ3が必要であるが、本願発
明においては、大電流使用時に良好な溶接作業性を得る
ために、Ａｌ2Ｏ3含有量を低く抑える。このため、Ａｌ
2Ｏ3の含有量を４重量％以下に規制する。Ａｌ2Ｏ3含有
量が４重量％を超えるとスラグの粘性が高くなり過ぎ
て、スラグの巻き込み及びビードの蛇行が生じやすくな
る。 Al 2 O 3 ; 0.5 to 4% by weight Al 2 O 3 is a neutral component, and is an effective component for controlling the melting point and viscosity of the slag by suppressing the decrease in the basicity of the slag as much as possible. is there. The conventional flux requires a large amount of Al 2 O 3 in order to obtain good welding workability. However, in the present invention, in order to obtain good welding workability when using a large current, the Al 2 O 3 content is low. Keep it low. Therefore, Al
The content of 2 O 3 is restricted to 4% by weight or less. If the Al 2 O 3 content exceeds 4% by weight, the viscosity of the slag becomes too high, so that the slag is involved and the beads meander easily.
【００１７】しかし、Ａｌ2Ｏ3の含有量が０．５重量％
未満の場合は、生成スラグが粘性不足になってアンダー
カットが生じやすくなるばかりでなく、スラグ剥離性も
悪くなる。このため、Ａｌ2Ｏ3含有量は０．５乃至４重
量％にする必要がある。大電流での溶接作業性を考慮す
ると、より好ましい範囲は０．８乃至３．８重量％であ
る。However, the content of Al 2 O 3 is 0.5% by weight.
If it is less than 3, not only does the generated slag become insufficient in viscosity and undercut easily occurs, but also the slag removability deteriorates. For this reason, the Al 2 O 3 content needs to be 0.5 to 4% by weight. Considering the welding workability at a large current, a more preferable range is 0.8 to 3.8% by weight.
【００１８】Ｎａ2Ｏ及び／又はＫ2Ｏ；０．０５乃至５
重量％ Ｎａ2Ｏ及びＫ2Ｏはアーク安定剤及びスラグの粘度調整
剤として有効である。Ｎａ2Ｏ及びＫ2Ｏはいずれも同一
の作用効果を有するので、Ｎａ2Ｏ及びＫ2Ｏはそのいず
れかを単独で又は双方を複合して添加すればよい。 Na 2 O and / or K 2 O; 0.05 to 5
Wt% Na 2 O and K 2 O is effective as a viscosity modifier of the arc stabilizer and the slag. Since both Na 2 O and K 2 O have the same action and effect, either Na 2 O or K 2 O may be added alone or in combination of both.
【００１９】これらの成分の含有量が総量で０．０５重
量％未満であると、アーク安定性が悪くなり、ビードの
凹凸及び蛇行が著しくなる。しかし、これらの成分の総
含有量が５重量％を超えると、耐吸収性が劣化し、ピッ
ト及びボックマークが発生する。If the total content of these components is less than 0.05% by weight, the arc stability becomes poor, and the unevenness and meandering of the bead become remarkable. However, when the total content of these components exceeds 5% by weight, the absorption resistance is deteriorated, and pits and box marks are generated.
【００２０】ＳｉＯ2／（ＣａＦ2＋Ａｌ2Ｏ3）；３．５
乃至１０ ＳｉＯ2、ＣａＦ2、Ａｌ2Ｏ3は、夫々前記規定範囲で含
有させることが必須要件であるが、更に、ＳｉＯ2と
（ＣａＦ2＋Ａｌ2Ｏ3）との比ＳｉＯ2／（ＣａＦ2＋Ａ
ｌ2Ｏ3）を３．５乃至１０の範囲に規定することによ
り、大電流溶接においても、作業性を損なうことなく、
靱性が優れた溶接金属が得られる。 SiO 2 / (CaF 2 + Al 2 O 3 ); 3.5
To 10 SiO 2, CaF 2, Al 2 O 3 is a mandatory requirement to be contained in each said specified range, furthermore, the ratio SiO 2 / (CaF between SiO 2 and (CaF 2 + Al 2 O 3 ) 2 + A
l 2 O 3 ) in the range of 3.5 to 10, even in high current welding, without impairing workability.
A weld metal with excellent toughness is obtained.
【００２１】即ち、前記比が３．５未満では、靱性は良
好なものの、スラグの粘性が不足し、ビードの蛇行及び
アンダーカットが発生しやすくなる。一方、前記比が１
０を超えると、溶接作業性は良好なものの、溶接金属の
酸素量が増加して靱性が劣化する。このため、前記比は
３．５乃至１０にする必要がある。That is, when the ratio is less than 3.5, the toughness is good, but the viscosity of the slag is insufficient, and the meandering and undercut of the bead tend to occur. On the other hand, the ratio is 1
If it exceeds 0, although the welding workability is good, the oxygen content of the weld metal increases and the toughness deteriorates. Therefore, the ratio needs to be 3.5 to 10.
【００２２】ＰｂＯ及び／又はＢｉ2Ｏ3；０．０１乃至
０．２重量％ ＰｂＯ及びＢｉ2Ｏ3はより一層のスラグ剥離性を望む場
合に必要に応じて添加されるものであり、その一方を単
独で又は双方を複合して添加すればよい。ＰｂＯ及び／
又はＢｉ2Ｏ3を添加する場合は、総量で０．０１重量％
以上添加しないとその効果が得られない。一方、ＰｂＯ
及び／又はＢｉ2Ｏ3の総含有量が０．２重量％を超える
と、スラグの粘性が不足し、ビードが蛇行し易くなる。 PbO and / or Bi 2 O 3 ; 0.01 to
0.2 wt% PbO and Bi 2 O 3 are added as needed when further slag releasability is desired, and one of them may be added alone or in combination of both. PbO and /
Or when Bi 2 O 3 is added, the total amount is 0.01% by weight.
If not added, the effect cannot be obtained. On the other hand, PbO
If the total content of Bi 2 O 3 and / or Bi 2 O 3 exceeds 0.2% by weight, the viscosity of the slag is insufficient and the beads tend to meander.
【００２３】なお、上記特定成分以外でも通常フラック
スに用いられている微量成分の添加を排除するものでは
ない。このような成分としては、ＢａＯ、Ｂ2Ｏ3、Ｆｅ
Ｏ、ＺｒＯ2及びＬｉ2Ｏ等がある。これらの成分は夫々
個別的に１．０重量％以下、且つ合計でも１．０重量％
以下の場合に、添加しても本発明の効果は何ら阻害され
ない。It is to be noted that addition of trace components other than the above-mentioned specific components, which are usually used in a flux, is not excluded. Such components include BaO, B 2 O 3 , Fe
O, ZrO 2, Li 2 O and the like. Each of these components is 1.0% by weight or less individually, and 1.0% by weight in total.
In the following cases, the effect of the present invention is not hindered even if added.
【００２４】[0024]
【実施例】以下、本発明の実施例についてその比較例と
比較して説明する。下記表１、２、３に示すＮｏ．１〜
Ｎｏ．５０の組成のフラックスを常法に従って調製し、
溶接作業性及び溶接金属の衝撃値を調べた。なお、溶接
条件は以下に示す。また、溶接作業性及び溶接金属の衝
撃値も下記表１、２、３に合わせて示す。但し、表１は
実施例１乃至２０、表２は実施例２１乃至３２、表３は
比較例３３乃至５１の組成及び試験結果を示す。EXAMPLES Examples of the present invention will be described below in comparison with comparative examples. Nos. Shown in Tables 1, 2 and 3 below. 1 to
No. A flux having a composition of 50 was prepared according to a conventional method,
The welding workability and the impact value of the weld metal were examined. The welding conditions are shown below. The welding workability and the impact value of the weld metal are also shown in Tables 1, 2, and 3 below. However, Table 1 shows the compositions and test results of Examples 1 to 20, Table 2 of Examples 21 to 32, and Table 3 of Comparative Examples 33 to 51.
【００２５】溶接条件 母材：ＪＩＳ ＳＭ４００Ｂ、厚さが２５ｍｍ、長さが
１０００ｍｍ ワイヤ：ＪＩＳ Ｚ３３５１ ＹＳ−Ｓ６、直径が４．
８ｍｍ 溶接方法：単電極両面一層溶接 溶接入熱：５４〜７６ｋＪ／ｃｍ フラックス粒度：２０×Ｄ メッシュ（なお、これはＪ
ＩＳ Ｚ８８０１（標準ふるい）に規定されている呼び
寸法であり、粒度を規定し、対応メッシュで表示したも
のである） 開先形状：８０°Ｖ字形状を両面に設け、そのＶ字底部
間距離を８ｍｍ、Ｖ字深さをいずれも８．５ｍｍとし
た。衝撃試験 衝撃試験の試験片は、板厚中央から、ＪＩＳ Ｚ３２１
２ ４号試験片（２ｍｍＶサイドノッチ）を採取し、０
℃で衝撃試験を行った。試験は３本の試験片を用いて行
い、その平均値を採用した。 Welding conditions Base material: JIS SM400B, thickness 25 mm, length 1000 mm Wire: JIS Z3351 YS-S6, diameter: 4.
8 mm Welding method: Single electrode double-sided single layer welding Heat input: 54 to 76 kJ / cm Flux particle size: 20 × D mesh (this is J
This is the nominal size specified in IS Z8801 (standard sieve), which defines the particle size and is indicated by the corresponding mesh.) Groove shape: 80 ° V-shape is provided on both sides, and the distance between the V-shape bottoms Was 8 mm, and the V-shaped depth was 8.5 mm in each case. Impact test The test piece of the impact test is JIS Z321 from the center of the plate thickness.
24 No. 4 test piece (2 mm V side notch) was collected and
The impact test was performed at ° C. The test was performed using three test pieces, and the average value was adopted.
【００２６】[0026]
【表１】 [Table 1]
【００２７】[0027]
【表２】 [Table 2]
【００２８】[0028]
【表３】 [Table 3]
【００２９】但し、その他の欄は、微量成分（ＢａＯ、
Ｂ2Ｏ3，ＦｅＯ，ＺｒＯ2，Ｌｉ2Ｏ等）及び不純物であ
る。また、比はＳｉＯ2／（ＣａＦ2＋Ａｌ2Ｏ3）であ
る。また、◎は極めて良好な場合、○は良好な場合、×
は不良の場合である。However, in the other columns, trace components (BaO,
B 2 O 3 , FeO, ZrO 2 , Li 2 O, etc.) and impurities. The ratio is SiO 2 / (CaF 2 + Al 2 O 3 ). In addition, ◎ is extremely good, 、 is good, ×
Is the case of failure.
【００３０】この表１乃至３から明らかなように、本発
明の実施例のフラックス（Ｎｏ．１〜Ｎｏ．３２）は溶
接作業性及び溶接金属の靱性のいずれも良好な結果が得
られた。しかしながら、比較例のフラックス（Ｎｏ．３
３〜Ｎｏ．５１）は夫々以下に示す欠点がある。比較例
Ｎｏ．３３はＳｉＯ2量が少ないために、ビード外観が
悪くアンダーカットも発生した。比較例Ｎｏ．３４はＳ
ｉＯ2量が多いために、靱性が低かった。比較例Ｎｏ．
３５はＣａＯ量が少ないために、ビード外観が悪かっ
た。比較例Ｎｏ．３６はＣａＯ量が多いために、スラグ
剥離性が悪かった。比較例Ｎｏ．３７はＣａＦ2量が少
ないために、靱性が低かった。比較例Ｎｏ．３８はＣａ
Ｆ2量が多いために、スラグ巻き込みが発生し、スラグ
剥離も悪かった。比較例Ｎｏ．３９はＭｎＯ量が少ない
ために、アンダーカットが発生し、スラグの剥離が悪か
った。比較例Ｎｏ．４０はＭｎＯ量が多いために、ビー
ド外観が悪く靱性も低かった。比較例Ｎｏ．４１はＭｇ
Ｏ量が少ないために、ビード外観が悪く靱性も低かっ
た。比較例Ｎｏ．４２はＭｇＯ量が多いために、ポック
マークが発生した。比較例Ｎｏ．４３はＴｉＯ2量が少
ないために、靱性が低かった。比較例Ｎｏ．４４はＴｉ
Ｏ2量が多いために、スラグの剥離が悪かった。比較例
Ｎｏ．４５はＡｌ2Ｏ3量が少ないために、アンダーカッ
トが生じた。比較例Ｎｏ．４６はＡｌ2Ｏ3が多いため
に、スラグ巻き込みが発生し、且つビード外観が悪かっ
た。比較例Ｎｏ．４７はＮａ2Ｏ＋Ｋ2Ｏ量が少ないため
に、ビード外観が悪かった。比較例Ｎｏ．４８はＮａ2
Ｏ＋Ｋ2Ｏ量が多いために、ポックマークが発生した。
比較例Ｎｏ．４９はＳｉＯ2／（ＣａＦ2＋Ａｌ2Ｏ3）の
比率が小さいために、靱性は良好なもののビード外観が
悪かった。比較例Ｎｏ．５０はＳｉＯ2／（ＣａＦ2＋Ａ
ｌ2０3）の比率が大きいために、ビード外観は良好であ
ったが、靱性が低かった。比較例Ｎｏ．５１はＰｂＯ量
が多いためにビード外観が悪かった。As is clear from Tables 1 to 3, the fluxes (No. 1 to No. 32) of the examples of the present invention showed good results in both the workability of welding and the toughness of the weld metal. However, the flux of the comparative example (No. 3)
3-No. 51) have the following disadvantages. Comparative Example No. In No. 33, since the amount of SiO 2 was small, the bead appearance was poor and an undercut occurred. Comparative Example No. 34 is S
Due to the large amount of iO 2 , the toughness was low. Comparative Example No.
No. 35 had a poor bead appearance due to a small amount of CaO. Comparative Example No. No. 36 had poor slag removability due to a large amount of CaO. Comparative Example No. No. 37 had low toughness due to a small amount of CaF 2 . Comparative Example No. 38 is Ca
Due to the large amount of F 2 , slag entrainment occurred and slag separation was poor. Comparative Example No. In No. 39, since the amount of MnO was small, undercut occurred, and slag peeling was poor. Comparative Example No. Since No. 40 had a large amount of MnO, the bead appearance was poor and the toughness was low. Comparative Example No. 41 is Mg
Since the amount of O was small, the bead appearance was poor and the toughness was low. Comparative Example No. Sample No. 42 had a large amount of MgO, and thus had a pock mark. Comparative Example No. No. 43 had low toughness due to a small amount of TiO 2 . Comparative Example No. 44 is Ti
Due to the large amount of O 2 , slag peeling was poor. Comparative Example No. In No. 45, an undercut occurred because the amount of Al 2 O 3 was small. Comparative Example No. No. 46 had a large amount of Al 2 O 3 , slag was involved, and the bead appearance was poor. Comparative Example No. No. 47 had a poor bead appearance because the amount of Na 2 O + K 2 O was small. Comparative Example No. 48 is Na 2
Due to the large amount of O + K 2 O, a pock mark occurred.
Comparative Example No. Since No. 49 had a small SiO 2 / (CaF 2 + Al 2 O 3 ) ratio, it had good toughness but poor bead appearance. Comparative Example No. 50 is SiO 2 / (CaF 2 + A
due to the large ratio of l 2 0 3), but the bead appearance was good, toughness was low. Comparative Example No. No. 51 had poor bead appearance due to a large amount of PbO.
【００３１】[0031]
【発明の効果】以上説明したように、本発明は、フラッ
クスの組成を適切なものにし、特にＡｌ2Ｏ3の含有量及
びＳｉＯ2／（ＣａＦ2＋Ａｌ2Ｏ3）比を適切なものにし
たので、溶接品質を劣化させることなく、大電流による
溶接を可能とし、溶接作業性及び溶接能率を向上させる
ことができるサブマージアーク溶接用溶融型フラックス
を提供することができる。As described above, according to the present invention, the composition of the flux is made appropriate, and in particular, the Al 2 O 3 content and the SiO 2 / (CaF 2 + Al 2 O 3 ) ratio are made appropriate. Therefore, it is possible to provide a molten flux for submerged arc welding that enables welding with a large current without deteriorating welding quality, and can improve welding workability and welding efficiency.
Claims (2)
Ｏ；０．５乃至５重量％、ＣａＦ2；３乃至１０重量
％、Ｍｎ０；１５乃至２２重量％、ＭｇＯ；１０乃至２
０重量％、ＴｉＯ2；１乃至１０重量％、Ａｌ2Ｏ3；
０．５乃至４重量％、Ｎａ2Ｏ及び／又はＫ2Ｏ；０．０
５乃至５重量％を含有し、ＳｉＯ2／（ＣａＦ2；＋Ａｌ
2Ｏ3）；３．５乃至１０であると共に、残部は微量成分
及び不可避的不純物からなることを特徴とするサブマー
ジアーク溶接用溶融型フラックス。1. SiO 2 ; 45 to 55% by weight, Ca
O: 0.5 to 5% by weight, CaF 2 : 3 to 10% by weight, Mn 0: 15 to 22% by weight, MgO: 10 to 2
0% by weight, TiO 2 ; 1 to 10% by weight, Al 2 O 3 ;
0.5-4% by weight, Na 2 O and / or K 2 O;
5 to 5% by weight, SiO 2 / (CaF 2 ; + Al
2 O 3 ); a molten flux for submerged arc welding, wherein the flux is 3.5 to 10, and the balance is composed of trace components and unavoidable impurities.
Ｏ；０．５乃至５重量％、ＣａＦ2；３乃至１０重量
％、Ｍｎ０；１５乃至２２重量％、ＭｇＯ；１０乃至２
０重量％、ＴｉＯ2；１乃至１０重量％、Ａｌ2Ｏ3；
０．５乃至４重量％、Ｎａ2Ｏ及び／又はＫ2Ｏ；０．０
５乃至５重量％、ＰｂＯ及び／又はＢｉ2Ｏ3；０．０１
乃至０．２重量％を含有し、ＳｉＯ2／（ＣａＦ2；＋Ａ
ｌ2Ｏ3）；３．５乃至１０であると共に、残部は微量成
分及び不可避的不純物からなることを特徴とするサブマ
ージアーク溶接用溶融型フラックス。2. SiO 2 ; 45 to 55% by weight, Ca
O: 0.5 to 5% by weight, CaF 2 : 3 to 10% by weight, Mn 0: 15 to 22% by weight, MgO: 10 to 2
0% by weight, TiO 2 ; 1 to 10% by weight, Al 2 O 3 ;
0.5-4% by weight, Na 2 O and / or K 2 O;
5 to 5% by weight, PbO and / or Bi 2 O 3 ; 0.01
-0.2% by weight, SiO 2 / (CaF 2 ; + A
l 2 O 3 ); a molten flux for submerged arc welding, wherein the flux is 3.5 to 10, and the balance is composed of trace components and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10007694A JP2667636B2 (en) | 1994-05-13 | 1994-05-13 | Molten flux for submerged arc welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10007694A JP2667636B2 (en) | 1994-05-13 | 1994-05-13 | Molten flux for submerged arc welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07303990A JPH07303990A (en) | 1995-11-21 |
| JP2667636B2 true JP2667636B2 (en) | 1997-10-27 |
Family
ID=14264365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10007694A Expired - Fee Related JP2667636B2 (en) | 1994-05-13 | 1994-05-13 | Molten flux for submerged arc welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2667636B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4553787B2 (en) * | 2005-04-28 | 2010-09-29 | 株式会社神戸製鋼所 | Fused flux for submerged arc welding |
| CN111761254B (en) * | 2020-06-29 | 2022-01-28 | 中国船舶重工集团公司第七二五研究所 | Seamless flux-cored wire for welding ocean engineering high-strength steel |
-
1994
- 1994-05-13 JP JP10007694A patent/JP2667636B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07303990A (en) | 1995-11-21 |
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