JPS63183795A - Flux cored wire for gas shielded arc welding - Google Patents
Flux cored wire for gas shielded arc weldingInfo
- Publication number
- JPS63183795A JPS63183795A JP16737386A JP16737386A JPS63183795A JP S63183795 A JPS63183795 A JP S63183795A JP 16737386 A JP16737386 A JP 16737386A JP 16737386 A JP16737386 A JP 16737386A JP S63183795 A JPS63183795 A JP S63183795A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- flux
- arc
- ratio
- shielded arc
- 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
- 238000003466 welding Methods 0.000 title claims abstract description 76
- 230000004907 flux Effects 0.000 title claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 17
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 17
- 239000002893 slag Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 230000035515 penetration Effects 0.000 abstract description 6
- 239000011324 bead Substances 0.000 description 22
- 239000011734 sodium Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000010953 base metal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 239000010433 feldspar Substances 0.000 description 2
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229910017076 Fe Zr Inorganic materials 0.000 description 1
- 229910002551 Fe-Mn Inorganic materials 0.000 description 1
- 229910002593 Fe-Ti Inorganic materials 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Landscapes
- Nonmetallic Welding Materials (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は浅溶込み条件下においても優れたアーク安定性
を示すガスシールドアーク溶接用フラックス入りワイヤ
に関し、殊に極薄板の溶接やパイプの裏波溶接等に適し
たガスシールドアーク溶接用フラックス入りワイヤに関
するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a flux-cored wire for gas-shielded arc welding that exhibits excellent arc stability even under shallow penetration conditions, and is particularly suitable for welding ultra-thin plates and pipes. This invention relates to a flux-cored wire for gas-shielded arc welding that is suitable for uranami welding and the like.
［従来の技術］
ガスシールドアーク溶接は、溶接作業を高能率に実施で
きると共に溶接部の機械的性質が低水素系被覆アーク溶
接棒と同程度に優秀であり、且つ全姿勢溶接が可能であ
る等の理由から広範囲の用途に使用されている。しかも
元々溶造みの深い溶接金属を形成することができるとい
う特徴をも備えていることから、大厚板や中厚板の溶接
に適した溶接法とされているが、最近では溶込み性を改
良して車輌等の分野における薄板の溶接にも適用される
様になっている。例えば薄板のガスシールドアーク溶接
の分野では、既にＪＩＳ Ｚ ３３１２ ＹＧＷ
Ｉ ２タイプのソリッドワイヤの様に短絡移行性が優れ
溶込みの浅いワイヤが開発され使用されている。[Prior art] Gas-shielded arc welding allows welding work to be carried out with high efficiency, the mechanical properties of the welded part are as excellent as those of low-hydrogen coated arc welding rods, and all-position welding is possible. For these reasons, it is used in a wide range of applications. Moreover, it has the characteristic of being able to form deep weld metal, so it is considered to be a welding method suitable for welding large and medium-thick plates. This method has been improved and is now being applied to welding thin plates in fields such as vehicles. For example, in the field of gas-shielded arc welding of thin plates, JIS Z 3312 YGW has already been established.
Wires such as I2 type solid wires, which have excellent short-circuit transferability and shallow penetration, have been developed and are in use.
この様にガスシールドアーク溶接の適用範囲は益々拡大
される傾向にあり、従来はＴＩＧ溶接に顆ってきた０、
６〜０．８ ｍｍ程度の極薄板の溶接やパイプの裏波溶
接にも、低コスト且つ高能率なガスシールドアーク溶接
の適用が検討され始めている。In this way, the scope of application of gas-shielded arc welding tends to be expanded more and more.
The application of low-cost, high-efficiency gas-shielded arc welding has begun to be considered for welding extremely thin plates of about 6 to 0.8 mm and for pipe welding.
［発明が解決しようとする問題点］
しかるに現在提案されている薄板溶接用のソリッドワイ
ヤでは、溶込み量が極めて少量に制限される薄板溶接（
例えば厚さ０．８ ｍｍのＩ型突合せ溶接）用としては
アーク安定性が悪く必ずしも満足し得る溶接結果を得る
ことができない、即ち薄板溶接の様な浅溶込み溶接では
溶接電流値を下げなければならないが、そうするとアー
クの安定性が悪くなり、断続的なアークによって局部的
に深溶造みとなり溶落ちが発生する。又アークの安定性
が溶接ビードの外観を直接的に支配する様なバイブの裏
波溶接にあっては、やや不満足な結果を招き易く、時に
よっては溶接の実施が困難であった。[Problems to be Solved by the Invention] However, the currently proposed solid wires for welding thin plates are difficult to weld (thin plate welding) where the amount of penetration is limited to an extremely small amount.
For example, when used for I-type butt welding with a thickness of 0.8 mm, the arc stability is poor and it is not always possible to obtain satisfactory welding results.In other words, the welding current value must be lowered for shallow penetration welding such as thin plate welding. However, if this happens, the stability of the arc deteriorates, and the intermittent arc causes local deep melting and burn-through. Furthermore, in vibrator uranami welding in which the appearance of the weld bead is directly controlled by the stability of the arc, somewhat unsatisfactory results tend to occur, and in some cases it has been difficult to carry out the welding.
本発明はこうした事情に着目してなされたものであって
、極薄板の溶接やバイブの裏波溶接に適用することがで
きる様な、アーク安定性の優れたガスシールドアーク溶
接用ワイヤを提供することを目的とするものである。The present invention has been made in view of these circumstances, and it is an object of the present invention to provide a gas shielded arc welding wire with excellent arc stability, which can be applied to welding ultra-thin plates and back wave welding of vibrators. The purpose is to
［問題点を解決するための手段］
しかして上記目的を達成した本発明のガスシールドアー
ク溶接用フラックス入りワイヤとは、Ｃ： Ｏ，Ｏａ％
（重量％の意味、以下同じ）以下の鋼製外皮中に、下記
成分並びにスラグ形成剤を含有するフラックスを８〜２
０％の割合で充填してなる点に要旨を有するものである
。[Means for Solving the Problems] The flux-cored wire for gas-shielded arc welding of the present invention that achieves the above object has C: O, Oa%.
(Meaning of weight %, the same applies hereinafter) 8 to 2% of flux containing the following components and slag forming agent is added to the following steel shell
The gist of this is that it is filled at a rate of 0%.
アルカリ金属：０．１〜５％
（Ｎ ａ ／ Ｋ ）比：１〜５０％
Ｃ： ０．３〜２．５％
金属粉 ＝８０％以上
［作用コ
従来のガスシールドアーク溶接用ワイヤは一般にソリッ
ドワイヤであり、前述の様な諸問題を抱えていたので、
本発明においては、安価な交流溶接機が利用でき、又ス
ラグの生成によってビード外観が良好になるという理由
からフラックス入りワイヤを採用することとした。そし
てフラックス入りワイヤにおける外皮金属及び充填フラ
ックスの構成を夫々工夫することにより、アーク安定性
の向上並びに溶込み深さの抑制という課題に答えている
。Alkali metal: 0.1-5% (Na/K) ratio: 1-50% C: 0.3-2.5% Metal powder = 80% or more Since it was a solid wire and had the problems mentioned above,
In the present invention, a flux-cored wire is used because an inexpensive AC welding machine can be used and the bead appearance is improved by generating slag. The problems of improving arc stability and suppressing penetration depth have been solved by devising the configurations of the outer sheath metal and the filling flux in the flux-cored wire.
以下本発明の構成を順を追って説明する。The configuration of the present invention will be explained in order below.
（Ａ）鋼製外皮金属
（１）鋼製外皮中のＣ量：０゜０８％以下鋼製外皮中の
Ｃ量が増加するとアークの方向性が不安定となり裏波溶
接においては裏波ビードの外観が悪化すると共にスパッ
タが増加する。従って鋼製外皮中のＣ量は少ない方が望
ましく、Ｏ，Ｏａ％以下とする必要がある。特に鋼製外
皮中のＣ量を０．０５％以下にするとアークの方向性が
一層均一となってアーク安定性が良好となり薄板で且つ
ルート間隙の広い開先についても容易に溶接することが
でき、スパッタ量も減少する。尚鋼製外皮としては一般
に軟鋼が使用されるが、Ｃ以外の成分については格別の
制限はない。又合金成分は一般にフラックス中に含ませ
ておくが、必要により鋼製外皮中に含ませることも可能
である。(A) Steel sheath metal (1) Amount of C in the steel sheath: 0°08% or less When the amount of C in the steel sheath increases, the directionality of the arc becomes unstable, and in Uranami welding, the direction of the arc becomes unstable. The appearance deteriorates and spatter increases. Therefore, it is desirable that the amount of C in the steel outer skin is as small as possible, and it is necessary to keep it below O and Oa%. In particular, when the amount of C in the steel outer skin is 0.05% or less, the directionality of the arc becomes more uniform and the arc stability becomes better, making it possible to easily weld thin plates and grooves with wide root gaps. , the amount of spatter is also reduced. Although mild steel is generally used as the steel outer skin, there are no particular restrictions on components other than C. The alloy components are generally contained in the flux, but they can also be contained in the steel shell if necessary.
（Ｂ）充填フラックス
（１）アルカリ金属＝０．１〜５％
アルカリ金属はアーク安定剤として溶接材料によく用い
られているが、本発明においてはアークの安定化によっ
て薄板溶接での耐溶落性を向上させると共に、バイブの
裏波溶接における裏波ビード外観を改善する効果を発揮
する。しかし単にアルカリ金属を添加するだけでは不十
分であり、アルカリ金属を０．１〜５％添加すると共に
前・後記の要件を更に満足する必要がある。尚０．１％
未満では上記効果が得られず、一方５％を超えて添加し
てもアークの安定性をそれ以上に改善することができな
いばかりでなく、スラグの融点が低下して下向突合せ溶
接におけるスラグの被包状態が悪化し、且つビード外観
が損なわれる。(B) Filling flux (1) Alkali metal = 0.1 to 5% Alkali metals are often used as arc stabilizers in welding materials, but in the present invention, arc stabilization improves burn-through resistance in thin plate welding. It is effective in improving the appearance of the uranami bead in uranami welding of vibrators. However, simply adding an alkali metal is not sufficient; it is necessary to add 0.1 to 5% of an alkali metal and further satisfy the requirements described above and below. Furthermore, 0.1%
If the amount is less than 5%, the above effect cannot be obtained, while if it is added in excess of 5%, not only will the arc stability not be further improved, but the melting point of the slag will decrease and the slag will become weaker in downward butt welding. The encapsulation condition deteriorates and the bead appearance is impaired.
（２）アルカリ金属中の（Ｎａ／Ｋ）比：１〜５０第１
図（ａ）〜（ｄ）はＣ量しベルが夫々０．１％。(2) (Na/K) ratio in alkali metal: 1-50 1st
Figures (a) to (d) have a C content of 0.1%, respectively.
０．３％、１．０％、２．５％である４種類のフラック
スを充填したフラックス入りワイヤを使用してガスシー
ルドアーク溶接を行なったときの（Ｎａ／Ｋ）比と短絡
回数の関係を表わしたグラフである。尚測定条件は下記
の通りである。Relationship between (Na/K) ratio and number of short circuits when performing gas-shielded arc welding using flux-cored wire filled with four types of flux: 0.3%, 1.0%, and 2.5% This is a graph showing the following. The measurement conditions are as follows.
（測定条件）
厚さ６ｍｍＸ幅２００ｍｍＸ長さ５００ｍｍ５Ｍ５０材
ビードオンプレート
外皮金属（フープ）厚さ０．８ ｍｍＸ幅１１ｍｍ（外
径１２ｍｍφ、肉厚２ｍｍ
のパイプでも結果は同様
であった、）
成分組成 Ｃ： ０．０３％、Ｍｎ：０．２％。(Measurement conditions) Thickness: 6 mm x Width: 200 mm x Length: 500 mm 5M50 material Bead-on-plate shell metal (hoop) Thickness: 0.8 mm x Width: 11 mm (Results were similar for pipes with outer diameter of 12 mmφ and wall thickness of 2 mm.) Composition C: 0.03%, Mn: 0.2%.
Ｓ ７０．０１％、 Ｐ ： ０．０１２％。S: 70.01%, P: 0.012%.
ｓ ： ｏ、ｏｏａ％
ワイヤ径 １．２１φ
フラックス率 １３％
フラックス成分
アルカリ金属：ソーダ長石、カリ長石０紫長石、フッ化
ソーダ、フッ
カリ、フッ化リチウムを添
加（珪酸ソーダ、珪酸力
リ、珪酸リチウムを添加し
てもよい。この場合には
ビードの光沢が良くな
る。）
脱酸剤：Ｆｅ−Ｍｎ、Ｆｅ−３ｔ
合金剤：添加せず
スラグ生成剤：添加せず
第１図において（ａ） 〜（Ｃ）では（Ｎａ／Ｋ）比が
１以上になると短絡回数が増加し、５０を超えると却っ
て減少することが分かる。但しアルカリ金属量が０．０
５％（０，１％未満）の場合には殆んど変化がみられな
い。又フラックス中のＣ量しベルが０．１％（０，３％
未満）の場合には、アルカリ金属を添加すると共に（Ｎ
ａ／Ｋ）比を°１〜５０としても短絡回数の増加はみら
れなかった。s: o, ooa% Wire diameter 1.21φ Flux rate 13% Flux component alkali metal: soda feldspar, potassium feldspar 0 purple feldspar, sodium fluoride, fluoride, lithium fluoride added (sodium silicate, silicic acid, lithium silicate may be added. In this case, the gloss of the bead will improve.) Deoxidizing agent: Fe-Mn, Fe-3t Alloying agent: Not added Slag forming agent: Not added In Fig. 1 (a) In ~(C), it can be seen that when the (Na/K) ratio becomes 1 or more, the number of short circuits increases, and when it exceeds 50, it actually decreases. However, the amount of alkali metal is 0.0
In the case of 5% (less than 0.1%), almost no change is observed. Also, the amount of C in the flux is 0.1% (0.3%
(less than), add an alkali metal and (N
No increase in the number of short circuits was observed even when the a/K) ratio was changed from 1 to 50.
即ち他の要件を満足し、且つ（Ｎ ａ ／ Ｋ ）比が
１〜５０となる様にアルカリ金属を添加すると短絡回数
が著しく増加することが分かった。単位時間当たりの短
絡回数が多いということは溶滴の移行回数が多いという
ことであり、溶滴粒が小さくなりアークが安定して耐溶
落性が改゛善される。又バイブの裏波溶接においてはア
ークの安定により溶接作業性が改善され良好な裏波ビー
ドが得られる。That is, it has been found that when an alkali metal is added so that the other requirements are satisfied and the (N a / K ) ratio is 1 to 50, the number of short circuits increases significantly. A large number of short circuits per unit time means a large number of droplet transfers, which reduces the size of the droplet grains, stabilizes the arc, and improves the burn-through resistance. In addition, in uranami welding using a vibrator, welding workability is improved due to the stability of the arc, and a good uranami bead can be obtained.
（３）フラックス中のＣ量二０．３〜２．５％フラック
ス中のＣはシールドガス中の酸化成分に由来する酸素と
反応してＣＯガスを発生し、ワイヤ外皮筒から溶融プー
ル方向へ吹付けられるから、この力によってアークの集
中性が向上せしめられ良好な裏波ビードが形成される。(3) Amount of C in the flux 2 0.3 to 2.5% C in the flux reacts with oxygen derived from the oxidizing component in the shielding gas to generate CO gas, which flows from the wire jacket tube toward the molten pool. Since it is sprayed, this force improves the concentration of the arc and forms a good Uranami bead.
かかる効果を得る為には０．３％以上のＣが必要である
が、２．５％を超えて添加するとアークの集中性が良く
なりすぎて拡がりがなくなり、母材とのなじみが悪化す
る為裏波ビード形状が悪化する。In order to obtain such an effect, 0.3% or more of C is required, but if it is added in excess of 2.5%, the arc becomes too concentrated and does not spread, resulting in poor compatibility with the base metal. As a result, the Uranami bead shape deteriorates.
（４）金属粉：８０％以上
フラックス中にはアルカリ金属等のアーク安定剤、Ｆｅ
−Ｍｎ、Ｆｅ−５ｔ、ＡＩ、Ｆｅ−Ｔｉ、Ｆｅ−Ｚｒ、
金属Ｍｇ、金属Ｍｎ等の脱酸剤、Ｍｏ、Ｃｒ、Ｎｉ等の
合金剤、鉄粉。(4) Metal powder: 80% or more The flux contains arc stabilizers such as alkali metals, Fe
-Mn, Fe-5t, AI, Fe-Ti, Fe-Zr,
Deoxidizing agents such as metal Mg and metal Mn, alloying agents such as Mo, Cr, and Ni, iron powder.
ＴｉＯ□、ＺｒＯ２，ＳｉＯ２，Ａｌａ Ｏｓ 。TiO□, ZrO2, SiO2, AlaOs.
Ｃａｂ、ＭｇＯ等のスラグ生成剤等が含まれるが、スラ
グ生成量が増加すると生成スラグによって溶融プールが
被包され、アーク安定性が損なわれることがある。そこ
で脱酸剤１合金剤及び鉄粉からなる金属粉を８０％以上
配合してアーク安定性を向上させる必要がある。即ち金
属粉配合量が８０％未満であると、鉄粉を除くスラグ生
成剤の占める割合が相対的に大きくなりスラグ量が増加
してアーク安定性が悪化することになる。尚金属粉配合
量が９５％以上になるとアークの安定性は更に向上し薄
板溶接における耐溶落性および裏波溶接における裏波ビ
ード外観が極めて良好となる。Slag forming agents such as Cab and MgO are included, but when the amount of slag generated increases, the molten pool is covered with the generated slag, which may impair arc stability. Therefore, it is necessary to improve the arc stability by blending 80% or more of the deoxidizer 1 alloy agent and metal powder consisting of iron powder. That is, if the amount of metal powder mixed is less than 80%, the proportion of the slag forming agent other than iron powder becomes relatively large, the amount of slag increases, and the arc stability deteriorates. When the metal powder content is 95% or more, the stability of the arc is further improved, and the burn-through resistance in thin plate welding and the appearance of the uranami bead in uranami welding become extremely good.
（５）フラックス率＝８〜２０％
フラックス率はアークの方向性に大きな影響があり、フ
ラックス率が高すぎるとワイヤ外皮金属が薄くなり外皮
金属の溶落が先行してアークが不安定となり、且つワイ
ヤ溶融速度が低下する。一方フラックス率が低すぎると
アークの集中性が良くなりすぎてアークの拡がりが悪く
なり母材とのなじみが悪化する結果、裏波ビードの外観
を損なうと共に薄板溶接に招ける耐溶落性が悪化する。(5) Flux rate = 8 to 20% The flux rate has a great effect on the directionality of the arc. If the flux rate is too high, the wire sheath metal will become thinner and the sheath metal will burn through, making the arc unstable. And the wire melting rate is reduced. On the other hand, if the flux rate is too low, the concentration of the arc will be too good, resulting in poor arc spread and poor compatibility with the base metal, which will impair the appearance of the uranami bead and deteriorate the burn-through resistance that can lead to thin plate welding. do.
かかる理由からフラックス率は８〜２０％とすべきであ
る。For this reason, the flux rate should be 8-20%.
［実施例］
フラックス組成［アルカリ金属量、（Ｎａ／Ｋ）比、金
属粉量、Ｃ量］、フラックス率、外皮金属中のＣ量が夫
々第１表に示される通りであるガスシールドアーク溶接
用フラックス入りワイヤを用いて薄板溶接及びバイブの
裏波溶接を行ない、耐溶落性及び裏波ビード外観を官能
評価した。[Example] Gas-shielded arc welding in which the flux composition [alkali metal content, (Na/K) ratio, metal powder content, C content], flux rate, and C content in the outer skin metal are as shown in Table 1. Thin plate welding and vibrator uranami welding were performed using flux-cored wire, and the burn-through resistance and uranami bead appearance were sensory evaluated.
薄板溶接では、厚さ０．８ ｍｍ、幅７５ｍｍ、長さ３
００ｍｍの薄板を下向突合せ溶接して評価した。For thin plate welding, the thickness is 0.8 mm, the width is 75 mm, and the length is 3.
A thin plate with a thickness of 0.00 mm was welded downward butt welded and evaluated.
このときの溶接条件は、溶接電流、８０Ａ、溶接電圧：
１７ Ｖ、 ：、’−ルドガス：ＣＯ２（２０Ｉｔ／
分）とした。The welding conditions at this time were: welding current: 80A, welding voltage:
17 V, :,'-rud gas: CO2 (20It/
minutes).
また裏波溶接では、直径２００ｍ１ＩＩφ、肉厚１２ｍ
ｍ、開先角度６０°のバイブを水平に配置し全姿勢溶接
を行なって評価した。このときの溶接条件は溶接電流：
１００Ａ、溶接電圧：１８Ｖ、シールドガス；ＣＯ２（
２０％）＋Ａｔ” （ａｏ％）の混合ガス（２０Ｉｌ／
分）とした。In addition, in Uranami welding, the diameter is 200m1IIφ and the wall thickness is 12m.
A vibrator with a groove angle of 60° was placed horizontally and welding was performed in all positions for evaluation. The welding conditions at this time are welding current:
100A, welding voltage: 18V, shielding gas; CO2 (
20%)+At” (ao%) mixed gas (20Il/
minutes).
尚使用フラックス入りワイヤのフープ組成（Ｃを除＜）
、ワイヤサイズ等は前述の短絡回数測定実験と同じとし
た。In addition, the hoop composition of the flux-cored wire used (excluding C)
, wire size, etc. were the same as in the short circuit frequency measurement experiment described above.
第１表において、Ｎ００１はアルカリ金属を添加しなか
った為アークが不安定で耐溶落性及び裏波ビード外観が
いずれも不良であった。Ｎｏ、 ２． ３はＮａとＫを
夫々単独で添加した為アークが不安定で裏波ビード外観
も不良であった。一方Ｎｏ。In Table 1, since no alkali metal was added to No. 001, the arc was unstable, and both the burn-through resistance and the appearance of the Uranami bead were poor. No, 2. In No. 3, Na and K were each added individually, so the arc was unstable and the appearance of the underwave bead was poor. On the other hand, No.
１０はＮａ及びに即ちアルカリ金属の配合量が過多であ
り、薄板の下向突合せ溶接においてスラグの被包状態が
悪くなってビード外観が悪化した。In No. 10, the amount of Na and, that is, the alkali metal, was too large, and the slag encapsulation state deteriorated during downward butt welding of thin plates, resulting in poor bead appearance.
Ｎｏ、 １１は（Ｎ ａ ／ Ｋ ）比が高すぎる為
アークが不安定で耐溶落性及び裏波ビード外観が共に不
良であった。これらに対しＮｏ、 ４〜９はアルカリ金
属配合量及び（Ｎ ａ ／ Ｋ ）比が本発明を満足し
ており耐溶落性並びに裏波溶接性は良好であった。In No. 11, the (N a / K) ratio was too high, so the arc was unstable, and both the burn-through resistance and the appearance of the Uranami bead were poor. On the other hand, in Nos. 4 to 9, the alkali metal content and the (Na/K) ratio satisfied the present invention, and the burn-through resistance and uranami weldability were good.
Ｎｏ、１２はフラックス中の金属粉添加量が少ない（換
言すると鉄粉を除くスラグ生成剤量が多い）のでスラグ
量が増加しアーク安定性が悪くなってパイプの裏波溶接
において裏波ビード外観が不良となった。これに対しＮ
ｏ、１３〜１７は金属粉添加量が本発明を満足し良好な
耐溶落性及び裏波溶接状態が得られた。特に金属粉を９
５％以上添加したＮｏ、１４．１５．１７ではアーク安
定性が更に改善されて一層優れた溶接結果が得られた。No. 12 has a small amount of metal powder added in the flux (in other words, the amount of slag forming agent excluding iron powder is large), so the amount of slag increases and the arc stability deteriorates, resulting in the appearance of an uranami bead during uranami welding of pipes. became defective. On the other hand, N
Nos. 13 to 17, the metal powder addition amount satisfied the present invention, and good burn-through resistance and Uranami welding condition were obtained. Especially metal powder 9
With No. 14, 15, and 17 added in an amount of 5% or more, the arc stability was further improved and even better welding results were obtained.
Ｎｏ、１８はフラックス中のＣ量が０．２％と少なすぎ
る為アークの集中力が弱くバイブの裏波溶接においてビ
ード外観不良が発生した。一方Ｎｏ。In No. 18, the amount of C in the flux was too small at 0.2%, so the concentration of the arc was weak and poor bead appearance occurred during uranami welding with a vibrator. On the other hand, No.
２２はフラックス中のＣ量が３％と高すぎる為にアーク
の集中性が良くなりすぎてプールの拡がりが小さくなり
、母材とのなじみが悪化して薄板溶接の耐溶落性並びに
裏波溶接におけるビード外観゛がいずれも不良となった
。これらに対しＮｏ、１９〜２１及びＮｏ、２３〜２５
はフラックス中のＣ量が本発明を満足し良好な溶接結果
が得られた。特にＮｏ、２３〜２５は金属粉含有量が９
５％以上と高い為にＮｏ、１４．１５．１７と同様に一
層優れた溶接結果が得られた。In No. 22, the amount of C in the flux is too high at 3%, so the concentration of the arc becomes too good, the spread of the pool becomes small, and the compatibility with the base metal deteriorates, resulting in poor burn-through resistance of thin plate welding and uranami welding. The bead appearance in all cases was poor. For these, No. 19-21 and No. 23-25
The amount of C in the flux satisfied the requirements of the present invention, and good welding results were obtained. In particular, No. 23 to 25 have a metal powder content of 9
Since it was as high as 5% or more, even better welding results were obtained similar to No. 14, 15, and 17.
Ｎｏ、２８は外皮のＣ量が０．０９％と高すぎる為アー
クの方向が一定せずバイブ裏波溶接のビード外観が不良
となった。これに対し外皮中のＣ量が本発明を満足する
Ｎｏ、２６．２７では良好な溶接結果が得られた。又Ｎ
ｏ、３０はフラックス率が７％と低すぎる為にプールの
拡がりが小さくなり、母材のなじみ不良が発生して耐溶
落性及び裏波溶接ビード外観が不良となった。一方Ｎｏ
、３２はフラックス率が２１％と高すぎる為アークの方
向が一定しなくなりパイプ裏波溶接におけるビード外観
が不良となった。これに対しＮｏ、２９．３１゜３３．
３４はフラックス率が本発明を満足し良好な溶接結果が
得られた。In No. 28, the C content of the outer skin was too high at 0.09%, so the direction of the arc was not constant and the bead appearance of the vibrator uranami welding was poor. On the other hand, good welding results were obtained for No. 26.27, in which the amount of C in the outer skin satisfied the present invention. Also N
In case of No. 30, the flux rate was too low at 7%, so the expansion of the pool was small, and poor conformation of the base metal occurred, resulting in poor burn-through resistance and poor appearance of the Uranami weld bead. On the other hand, No
In No. 32, the flux rate was too high at 21%, so the direction of the arc became inconsistent, resulting in poor bead appearance during pipe uranami welding. On the other hand, No, 29.31°33.
In No. 34, the flux rate satisfied the present invention and good welding results were obtained.
［発明の効果］
本発明は以上の様に構成されており、外皮金属中のＣ量
及び充填フラックス組成並びにフラックス率を夫々前記
の如く規定したのでかかる構成のフラックス入りワイヤ
を用いてガスシールドアーク溶接するに際しアーク安定
性が増し裏波溶接におけるビード外観も良好となった。[Effects of the Invention] The present invention is configured as described above, and since the amount of C in the outer metal, the filling flux composition, and the flux rate are respectively defined as described above, a flux-cored wire having such a configuration can be used to create a gas-shielded arc. During welding, the arc stability increased and the bead appearance during uranami welding also improved.
又薄板溶接においては耐溶落性を改善することができた
。In addition, we were able to improve the burn-through resistance in thin plate welding.
第１図（ａ）〜（ｄ）はＮ ａ ／ Ｋ比と短絡回数の
関係を示すグラフである。
昭和６３年 ２月２７日
特許庁長官 小 川 邦 夫 殿 −１、事件の
表示
昭和６１年特許願第１６７３７３号
２、発明の名称
３、補正をする者
事件との関係 特許出願人
４、代理人FIGS. 1(a) to 1(d) are graphs showing the relationship between the N a /K ratio and the number of short circuits. Mr. Kunio Ogawa, Commissioner of the Patent Office, February 27, 1985 - 1. Indication of the case Patent Application No. 167373 filed in 1988 2. Title of the invention 3. Person making the amendment Relationship with the case Patent applicant 4. Agent Man
Claims (1)
外皮中に、下記成分並びにスラグ形成剤を含有するフラ
ックスを８〜２０％の割合で充填してなることを特徴と
するガスシールドアーク溶接用フラックス入りワイヤ。 アルカリ金属：０．１〜５％ （Ｎａ／Ｋ）比：１〜５０％ Ｃ：０．３〜２．５％ 金属粉：８０％以上[Claims] C: Flux containing the following components and a slag forming agent is filled in a steel shell of 0.08% (weight %, the same applies hereinafter) or less at a ratio of 8 to 20%. Flux-cored wire for gas shielded arc welding. Alkali metal: 0.1-5% (Na/K) ratio: 1-50% C: 0.3-2.5% Metal powder: 80% or more
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16737386A JPH0240435B2 (en) | 1986-07-15 | 1986-07-15 | GASUSHIIRUDOAAKUYOSETSUYOFURATSUKUSUIRIWAIYA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16737386A JPH0240435B2 (en) | 1986-07-15 | 1986-07-15 | GASUSHIIRUDOAAKUYOSETSUYOFURATSUKUSUIRIWAIYA |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63183795A true JPS63183795A (en) | 1988-07-29 |
| JPH0240435B2 JPH0240435B2 (en) | 1990-09-11 |
Family
ID=15848509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16737386A Expired - Lifetime JPH0240435B2 (en) | 1986-07-15 | 1986-07-15 | GASUSHIIRUDOAAKUYOSETSUYOFURATSUKUSUIRIWAIYA |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0240435B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6573476B2 (en) * | 2000-09-23 | 2003-06-03 | Kiswel, Ltd. | Flux cored wire for gas-shielded arc welding |
| WO2015029751A1 (en) | 2013-08-30 | 2015-03-05 | 株式会社神戸製鋼所 | Flux-containing wire |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6683505B2 (en) | 2016-03-08 | 2020-04-22 | 株式会社神戸製鋼所 | Welding method using special torch |
-
1986
- 1986-07-15 JP JP16737386A patent/JPH0240435B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6573476B2 (en) * | 2000-09-23 | 2003-06-03 | Kiswel, Ltd. | Flux cored wire for gas-shielded arc welding |
| WO2015029751A1 (en) | 2013-08-30 | 2015-03-05 | 株式会社神戸製鋼所 | Flux-containing wire |
| US10449637B2 (en) | 2013-08-30 | 2019-10-22 | Kobe Steel, Ltd. | Flux-cored wire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0240435B2 (en) | 1990-09-11 |
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