JPS619993A - Flux for submerged arc welding having good bead appearance - Google Patents

Flux for submerged arc welding having good bead appearance

Info

Publication number
JPS619993A
JPS619993A JP13088484A JP13088484A JPS619993A JP S619993 A JPS619993 A JP S619993A JP 13088484 A JP13088484 A JP 13088484A JP 13088484 A JP13088484 A JP 13088484A JP S619993 A JPS619993 A JP S619993A
Authority
JP
Japan
Prior art keywords
flux
arc welding
submerged arc
bead
mgo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13088484A
Other languages
Japanese (ja)
Inventor
Mikio Sakashita
幹雄 坂下
Koji Shinkawa
新川 耕治
Noboru Nishiyama
昇 西山
Osamu Nakahama
中浜 修
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP13088484A priority Critical patent/JPS619993A/en
Publication of JPS619993A publication Critical patent/JPS619993A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3601Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
    • B23K35/3602Carbonates, basic oxides or hydroxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

PURPOSE:To provide a flux for submerged arc welding having good bead external appearance by constituting so that the contents of Al2O3, SiO2, CaF2, MgO and CaO can satisfy the prescribed relating equation. CONSTITUTION:The component quantity of a flux is fixed within the range of 1-20% Al2O3; 1-25% SiO2, 1-20% CaF2, 20-50% MgO, 5-20% CaO (each wt%) and is adjusted so as to satisfy the equation of Y<=-87X+130. Now, Y= 3.7A+3.1S, X=C/M and A, S, C, M are respectively the % contents of Al2O3, SiO2, CaF2, MgO. The adhesion of a spatter onto the surface of bead is thus eliminated and the peelability of slugs is good, and the flux for submerged arc welding having excellent external appearance of beads is obtainable.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、潜弧溶接用フラックスに関し、スラグ剥離が
良く、またビード外観が極めて優れているフラックス成
分の改良に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a flux for submerged arc welding, and relates to an improvement in flux components that have good slag removal and extremely excellent bead appearance.

〔従来の技術〕[Conventional technology]

潜弧溶接は、大入熱ならびに高速溶接が可能であること
から、造船等の分野において溶接工程の自動化に必要不
可欠の技術である。潜弧溶接においてスラグ剥離性がよ
く、優れたビードを呈する特性を得るために、従来各種
のフラックスが報告されているが、それぞれ多くの問題
点を有していた。
Since submerged arc welding is capable of high heat input and high-speed welding, it is an essential technology for automating welding processes in fields such as shipbuilding. Various types of fluxes have been reported in the past in order to obtain characteristics such as good slag removability and excellent bead formation in submerged arc welding, but each has had many problems.

例えば、特開昭49−115040では、溶接ビート外
観を良好にするために、5i0228〜40%と多く含
んでいるが、5i02の還元による溶接金属中のSt量
の増加による靭性の劣化ならびにアークが不安定になる
ことによるスパッタのビード表面への付着等の弊害があ
る。
For example, in JP-A-49-115040, in order to improve the appearance of the weld bead, 5i0228 to 40% is included, but the reduction of 5i02 increases the amount of St in the weld metal, resulting in deterioration of toughness and arcing. This instability causes problems such as adhesion of sputter to the bead surface.

また、溶接部の高性能化ならひに高速化を図るために、
特開昭49−51136ではフラックス中にCaF2を
23〜40%と多量に含むものが提案されている。しか
し、CaF2はスラグの融点を極端に下げるために、ア
ーク中で発生したスパッタがビード表面上まで到達し易
くなり、スパッタのビード表面への付着が多くなる。
In addition, in order to improve the performance of the welding part, we need to increase the speed of the welding part.
JP-A-49-51136 proposes a flux containing a large amount of 23 to 40% CaF2. However, since CaF2 extremely lowers the melting point of the slag, spatter generated in the arc tends to reach the bead surface, and more spatter adheres to the bead surface.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

これらビード表面上へのスパッタの付着は、ビード外観
を損なうだけでなく、成分偏析等も考えられ、潜弧溶接
を重要構造物へ適用するに当って、大きな注意を払う必
要がある。
The adhesion of spatter on the bead surface not only impairs the appearance of the bead, but also may cause component segregation, and great care must be taken when applying submerged arc welding to important structures.

そこで本発明者らはフラックスの成分について種々検討
した。その結果、ビード表面上へのスパッタ付着が全く
発生しない潜弧溶接用フラックスを得ることができた0
本発明はこのようなど一ド外観の良好な潜弧溶接用フラ
ックスを提供することを目的とする。
Therefore, the present inventors conducted various studies on the components of flux. As a result, we were able to obtain a flux for submerged arc welding that does not cause any spatter adhesion on the bead surface.
An object of the present invention is to provide a flux for submerged arc welding that has a good appearance.

〔問題点を解決するための手段〕[Means for solving problems]

潜弧溶接法では、他の可視アーク溶接法に比べてスパッ
タはほとんど付着しないが、」−記検討の結果、ある範
囲内では却って多量に発生する場合があり、ビード表面
上に多くイ」着することを見出した。
In submerged arc welding, almost no spatter adheres compared to other visible arc welding methods, but as a result of our study, a large amount of spatter may be generated within a certain range, and a large amount of spatter may be deposited on the bead surface. I found out what to do.

この発生機構について種々検討した結果を模式的に第1
図に示す。第1図は溶接部の縦断面を略示したもので、
溶接部鋼板表面3上をフラックス2で覆い、電極1によ
り潜弧溶接している0図中(1)の領域は溶融スラグ、
(II )の領域は溶融金属、(m)の領域は凝固スラ
グ、(rV)の領域は凝固金属である。第1図に示すよ
うに、発生したスパッタ4(黒点で表示した)が溶融ス
ラグ(I)中を沈降し、ビード表面が溶融状!+(11
)のときは、スパッタは総へてビード内に取り込まれる
が、溶融スラグ領域(1)から凝固スラグ領域(II 
)に移行する近傍ではすでに凝固したビードは、第2図
にビードの平面図を示すようにスパッタ4がビード5の
表面に付着する。そこでビード5の表面へのスパッタ4
の付着を防ぐためには下記の2点の対策が挙げられる。
The results of various studies on this generation mechanism are summarized in the first part.
As shown in the figure. Figure 1 schematically shows the longitudinal section of the welded part.
The area (1) in Figure 0 where the surface 3 of the welded steel plate is covered with flux 2 and submerged arc welding is performed using electrode 1 is molten slag,
The region (II) is molten metal, the region (m) is solidified slag, and the region (rV) is solidified metal. As shown in Fig. 1, the generated spatter 4 (indicated by black dots) settles in the molten slag (I), and the bead surface becomes molten! +(11
), the spatter is completely taken into the bead, but the spatter is absorbed from the molten slag region (1) to the solidified slag region (II).
), the sputter 4 adheres to the surface of the bead 5, as shown in the plan view of the bead in FIG. 2, which has already solidified. Therefore, sputtering 4 on the surface of bead 5
The following two measures can be taken to prevent adhesion.

(1)スパッタの発生を減少させる。(1) Reduce the occurrence of spatter.

(2)スパッタをスラグ中で捕捉する。(2) Capturing spatter in the slag.

−h記(1)については、アーク電圧を上昇させるよう
なS i02 、AJ2203を減らせばよい。
Regarding item (1) in -h, it is sufficient to reduce S i02 and AJ2203, which increase the arc voltage.

また上記(2)については、スラグの凝固点を−しげる
ように、MgOの添加量を増すか、あるいは、CaF2
のような低融点化合物の添加量を減らせばよいとの知見
が得られるに至ったのである。
Regarding (2) above, the amount of MgO added should be increased to lower the freezing point of the slag, or the amount of CaF2
This led to the discovery that the amount of low-melting point compounds such as those added should be reduced.

本発明は、上記知見に基づいてなされたものであり、フ
ラックス中に(以下%とあるのは全て重量%を示す)、 A又203:1〜20% 5i02:1〜25% CaF2:1〜20% MgO:20〜50% CaO:5〜20% を含有し、 F記(1)式を満足することを特徴とすると一ド外観の
良好な潜弧溶接用フラックスである。
The present invention was made based on the above findings, and in the flux (hereinafter all % indicates weight %), A or 203:1-20% 5i02:1-25% CaF2:1- The flux for submerged arc welding has a good appearance when it contains 20% MgO: 20 to 50% and CaO: 5 to 20% and satisfies the following formula (1).

Y≦−87X+130       ・・・ (1)た
だし、 Y = 3.7 A + 3.1 S A:Al2O2の% S:5i020% X=C7M C:CaF2の% M+MgOの% である。
Y≦−87X+130 (1) However, Y = 3.7 A + 3.1 S A:% of Al2O2 S: 5i020%

〔作用〕[Effect]

次に本発明の潜弧溶接用フラックスの各組成成分量を上
述のような範囲に限定した理由について説明する。
Next, the reason why the amounts of each component of the flux for submerged arc welding of the present invention are limited to the above-mentioned ranges will be explained.

(a)Si02 Si02は溶接作業性を改善するが、あまり多いとスラ
グ剥離が不良となる。少ないとビート表面に突起が生じ
易い。そこで、本発明では5i02源として珪砂、珪石
法、水ガラス、長石などの添加を行い、5i02がフラ
ックス%として、1%以上でかつ15%以下とした。
(a) Si02 Si02 improves welding workability, but if too much, slag peeling becomes poor. If it is too low, protrusions are likely to form on the beet surface. Therefore, in the present invention, silica sand, silica method, water glass, feldspar, etc. are added as a 5i02 source, and 5i02 is set to be 1% or more and 15% or less as a flux percentage.

(b)A文203 A文203は20%を超えるとスラグの流動性が過剰と
なり、また1%に満たな(Xとビード表面の美観を損な
うので1%以上で751つ20%以下に限定する。
(b) A statement 203 In A statement 203, if it exceeds 20%, the fluidity of the slag will be excessive, and if it is less than 1% (X and the beauty of the bead surface will be spoiled, so it is limited to 751 or less than 20%. do.

(c)CaF2 CaF2は、1%より少なし)と溶接ビード゛の波が粗
くなってビード外観が悪く、またアーク力く不安定にな
り、さらに溶接金属中の酸素量力く増力口するなどの不
利があり、一方、20%を超えると溶融した金属−スラ
グの界面で次式 %式% の反応によってガスが多量に発生し、溶接ビートにあば
たが発生するので、1〜20%のm囲に限定される。
(c) CaF2 (CaF2 is less than 1%), the waves of the weld bead become rough, the appearance of the bead becomes poor, the arc force becomes unstable, and the amount of oxygen in the weld metal increases. On the other hand, if it exceeds 20%, a large amount of gas will be generated at the molten metal-slag interface due to the reaction of the following formula % formula %, and pockmarks will occur on the weld bead. limited to.

(d)MgO MgOは式(3)に示す塩基度を上lずて、し力)も溶
接スラグの剥離を良くする。
(d) MgO MgO increases the basicity shown in formula (3) and also improves the peeling of welding slag.

天11ノj一度 (B  L) =6.05Ncao +48ONMn。Heaven 11 Noj Once (B L) =6.05Ncao +48ONMn.

+4.OONM、O+3.4NF、〇 −631Ns102−4.97NT1o2−0.2 N
 A文、03 ・・・・・・ (3) ここに、 N 各モル分率 である。
+4. OONM, O+3.4NF, 〇-631Ns102-4.97NT1o2-0.2 N
A sentence, 03... (3) Here, N is each mole fraction.

MgOが50%を超えるとスラグの粘性がトリ過きてビ
ートの中央部が山高となり、またMgOか20%に満た
ないとスラブの>IImか劣化するので、20%〜50
%とした。
If the MgO content exceeds 50%, the viscosity of the slag becomes too thick and the center of the beet becomes mountainous, and if the MgO content is less than 20%, the slab deteriorates to >IIm, so
%.

(e)AQ203 、S +02 、CaF2  。(e) AQ203, S+02, CaF2.

MgOの相関 A2203 、S +02 、CaF2 、MgOは潜
弾溶接用フラ、クスに使用される代表的なものであるが
、前述のようシこ、A文203,5i02はアーク電圧
を上昇させる原料である。
Correlation of MgO A2203, S +02, CaF2, and MgO are typical materials used in submarine bomb welding fluxes, but as mentioned above, A203 and 5i02 are raw materials that increase the arc voltage. be.

またCaF2はスラグの融点を下げ、MgOはスラグの
融点を−Lげる原料である。
Further, CaF2 is a raw material that lowers the melting point of slag, and MgO is a raw material that lowers the melting point of slag by -L.

ビード表面へのスパッタ付着を防止するためには、前述
したようにスパッタの発生を減少させ、スラグの融点を
上げるようにすればよい。
In order to prevent spatter from adhering to the bead surface, it is sufficient to reduce the occurrence of spatter and raise the melting point of the slag, as described above.

そこで、Al103  、S +02 、CaF2 。Therefore, Al103, S+02, CaF2.

MgOを種々変えることにより、スラグの融点ならびに
ビード上へのスパッタの付着の発生状況を詳細に検討し
た。
By varying MgO, the melting point of the slag and the occurrence of sputtering on the bead were investigated in detail.

スラグの融点とMgOならびにCaF2との関係を第3
図に示す。
The relationship between the melting point of slag and MgO and CaF2 is explained in the third section.
As shown in the figure.

またスパッタの付着が発生しないようなフラックスの成
分範囲は第4図のように表される。そこで、スパッタの
付着が発生しないようなフシックス組成関係は、式(1
)に示す範囲であることが分った。
Further, the range of flux components in which sputtering does not occur is shown in FIG. 4. Therefore, the fusix composition relationship that prevents spatter adhesion is determined by the formula (1
) was found to be within the range shown.

Y≦−87X+130    −(1)ただし、 Y = 3.7 A + 3. I SA:A文203
の% S:5i02の% X=C/M C:CaF2の% M:MgOの% である。
Y≦−87X+130 −(1) However, Y = 3.7 A + 3. I SA: A sentence 203
% of S: % of 5i02 X=C/MC C: % of CaF2 M: % of MgO.

(f)CaO CaOは交流溶接時のアークを安定化させ、また溶融ス
ラグの塩基度を−Lげるが、CaOが20%を超えると
アンターカットが発生し易い。またCaOが5%に満た
ないと、F〕記効果が期待できない。
(f) CaO CaO stabilizes the arc during AC welding and also reduces the basicity of molten slag by -L, but if CaO exceeds 20%, undercuts are likely to occur. Further, if the CaO content is less than 5%, the effect mentioned above cannot be expected.

本発明のフランクスに脱酸剤を含有させてもよく1本発
明の効果は維持される。その添加量はFe−3iを0.
5%以し5%以下、 Mnを0.5%以上5%以下、 Fe−Ti10.5%以に5%以下 である。
The franks of the present invention may contain a deoxidizing agent and the effects of the present invention will be maintained. The amount of Fe-3i added is 0.
5% to 5%, Mn 0.5% to 5%, Fe-Ti 10.5% to 5%.

〔実施例〕〔Example〕

本発明の実施例を示す。 An example of the present invention is shown.

第1表−1,第1表−2に示すような成分組成の潜弧溶
接用フラックスを用いて潜弧溶接を行った0表中フラッ
クス成分はフラックス全重量に対する比率(%)である
、比較例1〜5.8.1O116,19は本発明の成分
範囲外のフラックス、実施例6.7.9.11〜15.
17.18は本発明の成分範囲および制限式(1)に適
合するフラックスである。
Submerged arc welding was performed using flux for submerged arc welding with the composition shown in Table 1-1 and Table 1-2. The flux components in Table 1 are the ratios (%) to the total weight of the flux. Comparison Examples 1 to 5.8.1O116,19 are fluxes outside the component range of the present invention; Examples 6.7.9.11 to 15.
17 and 18 are fluxes that meet the component range and restriction formula (1) of the present invention.

供試鋼板およびワイヤを第2表に示した。The test steel plates and wires are shown in Table 2.

またこの実験で採用した試験条件を第3表に示した。Further, the test conditions adopted in this experiment are shown in Table 3.

溶接は、板厚20mmの5M50の鋼板上に第3表に示
す溶接条件を用いて、ビードオンプレート溶接を行った
Welding was performed by bead-on-plate welding on a 5M50 steel plate with a plate thickness of 20 mm using the welding conditions shown in Table 3.

溶接後のスパッタ付着の有無、ビード外観、スラグ剥離
性、溶着金属の衝撃値を第1表に示した0本発明のフラ
ックスを用いた実施例は全て良好な成績を示した。
The presence or absence of spatter adhesion after welding, bead appearance, slag removability, and impact value of deposited metal as shown in Table 1.0 Examples using the flux of the present invention all showed good results.

〔発明の効果〕〔Effect of the invention〕

本発明に係る潜弧溶接用フラックスはビード表面上への
スパッタの付着がなく、またスラグの剥離性がよく、優
れた溶接継手を得ることができる。
The flux for submerged arc welding according to the present invention does not cause spatter to adhere to the bead surface, has good slag removability, and can provide excellent welded joints.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はスパンタイ1着機構を模式的に示す溶接部縦断
面図、第2図はスパッタ付着状況を示す溶接ビート平面
図、第3図はスラグの融点を示すグラフ、第4図はスパ
ッタ付着におよぼすフラックス成分の影響を表すグラフ
である。 1・・・ft、       2・・−フラックス3・
・・鋼板表面    4・・・スパッタ5・・・ビード
     (I)・・・溶融スラグ(TI )・・・溶
融金属  (m)・・・凝固スラグ(IV)・・・凝固
金属
Figure 1 is a vertical cross-sectional view of the welding section schematically showing the span tie 1 attachment mechanism, Figure 2 is a plan view of the weld bead showing the spatter adhesion situation, Figure 3 is a graph showing the melting point of slag, and Figure 4 is the spatter adhesion. 3 is a graph showing the influence of flux components on 1...ft, 2...-flux 3.
... Steel plate surface 4 ... Spatter 5 ... Bead (I) ... Molten slag (TI) ... Molten metal (m) ... Solidified slag (IV) ... Solidified metal

Claims (1)

【特許請求の範囲】 1 Al_2O_3:1〜20重量% SiO_2:1〜25重量% CaF_2:1〜20重量% MgO:20〜50重量% CaO:5〜20重量% を含有し、下記(1)式を満足することを特徴とするビ
ード外観の良好な潜弧溶接用フ ラックス。 Y≦−87X+130・・・(1) ただし、 Y=3.7A+3.1S A:Al_2O_3の重量% S:SiO_2の重量% X=C/M C:CaF_2の重量% M:MgOの重量%
[Claims] 1 Al_2O_3: 1 to 20% by weight SiO_2: 1 to 25% by weight CaF_2: 1 to 20% by weight MgO: 20 to 50% by weight CaO: 5 to 20% by weight, and contains the following (1) A flux for submerged arc welding with a good bead appearance that satisfies the formula. Y≦-87X+130...(1) However, Y=3.7A+3.1S A: Weight % of Al_2O_3 S: Weight % of SiO_2 X=C/MC C: Weight % of CaF_2 M: Weight % of MgO
JP13088484A 1984-06-27 1984-06-27 Flux for submerged arc welding having good bead appearance Pending JPS619993A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13088484A JPS619993A (en) 1984-06-27 1984-06-27 Flux for submerged arc welding having good bead appearance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13088484A JPS619993A (en) 1984-06-27 1984-06-27 Flux for submerged arc welding having good bead appearance

Publications (1)

Publication Number Publication Date
JPS619993A true JPS619993A (en) 1986-01-17

Family

ID=15044946

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13088484A Pending JPS619993A (en) 1984-06-27 1984-06-27 Flux for submerged arc welding having good bead appearance

Country Status (1)

Country Link
JP (1) JPS619993A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997030934A1 (en) 1996-02-21 1997-08-28 Kao Corporation Ultraviolet-screening composite particulate and process for the production thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997030934A1 (en) 1996-02-21 1997-08-28 Kao Corporation Ultraviolet-screening composite particulate and process for the production thereof

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