JPH02280996A - Bond flux for submerged arc welding - Google Patents
Bond flux for submerged arc weldingInfo
- Publication number
- JPH02280996A JPH02280996A JP10124689A JP10124689A JPH02280996A JP H02280996 A JPH02280996 A JP H02280996A JP 10124689 A JP10124689 A JP 10124689A JP 10124689 A JP10124689 A JP 10124689A JP H02280996 A JPH02280996 A JP H02280996A
- Authority
- JP
- Japan
- Prior art keywords
- flux
- welding
- submerged arc
- amount
- arc welding
- 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 57
- 230000004907 flux Effects 0.000 title claims abstract description 46
- 239000000203 mixture Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 239000007789 gas Substances 0.000 abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 7
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract description 5
- 229910001634 calcium fluoride Inorganic materials 0.000 abstract description 5
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 229910052593 corundum Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 17
- 239000002893 slag Substances 0.000 description 14
- 239000011324 bead Substances 0.000 description 7
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- -1 : 25-42% Inorganic materials 0.000 description 4
- 229910002551 Fe-Mn Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000009863 impact test Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 239000004034 viscosity adjusting agent Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001035 drying 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
- 239000004615 ingredient Substances 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Nonmetallic Welding Materials (AREA)
Abstract
Description
（産業上の利用分野）
本発明はサブマージアーク溶接用ボンドフラックスに係
り、特に高速スミ肉溶接及び下向の多層盛突合せ溶接に
おいて、優れた溶接作業性及び経済性と安定した機械的
性能が得られるサブマージアーク溶接用ボンドフラック
ス組成に関するものである。
（従来の技術及び解決しようとする課題）水平スミ肉溶
接のサブマージアーク溶接では一般に比較的小電流の高
速溶接が実施されている。
これは、大電流、低速溶接では等脚柱が得られないため
である。
従来、このような高速サブマージアーク溶接においては
、ポックマーク、ブローホール、ピット等のガス欠陥発
生の面から、炭酸塩を含有した低温ボンドフラックスは
採用されず、炭酸塩を含有しない溶融型フラックスが一
般に広く使用されていた。
しかし、この炭酸塩を含有しない溶融型フラックスを用
いて溶接した場合、溶融中に１例えば、ＣａＣＯ３−＊
ＣａＯ＋ＣＯ＋Ｏなる化学反応で発生するＣＯガスで大
気からシールドする効果が期待できず、その結果、溶接
金属中の（Ｎ）量が非常に不安定となり、靭性にバラツ
キが生じるという問題があった。
また、このように炭酸塩を含有しない溶融型フラックス
の場合、下向の多層盛突合せ溶接のサブマージアーク溶
接においても同様の問題があり。
更には、フラックス使用量が多く経済的でないという問
題もあった。
本発明は、上記従来技術の問題点を解決するためになさ
れたものであって、シールド効果を有するガス発生成分
を含有させたボンド型フラックスであっても、ガス欠陥
の発生がなく、優れた機械的性能の溶接金属が得られ、
また優れた溶接作業性を有する経済的なサブマージアー
ク溶接用フラックスを提供することを目的とするもので
ある。
（課題を解決するための手段）
本発明者は、上述のような問題点に対処すべくボンドフ
ラックスについて種々検討を重ねた。その結果、特に高
速水平スミ肉溶接及び下向の多層盛突合せ溶接のサブマ
ージアーク溶接において、優れた溶接作業性と安定した
機械的性能が得られる経済的なサブマージアーク溶接用
ボンドフラックスを見出したものである。
すなわち、本発明に係るサブマージアーク溶接用ボンド
フラックスは、Ｓｉｎ、：１７〜２６％、Ａ Ｍ、Ｏ，
：２５〜４２％、ＭｇＯ：１３〜２０％、Ｔ、Ｍｎ：５
〜ｌＯ％、ＣａＦ２２７〜２０％、Ｔ、Ｆｅ○：０．１
〜７．０％、Ｎａ２Ｏ及びに、０（７１１種又ハ２種＝
０．５〜３．５％、Ｔ、ＣＯ，：０．０５〜０．５％及
びＨ２：１０〜５０ｐｐｍを含む組成からなることを特
徴とするものである。
以下に本発明を更に詳細に説明する。
（作用）
本発明における化学成分の限定理由は以下のとおりであ
る。
Ｓｉｏ：１７〜２６％
Ｓｉｏ、は酸性成分であって、スラブの粘性、凝固温度
を調整するのに有効な成分である。しかし、１７％未満
ではスラグの粘性が不十分てビード幅の均一性が劣り、
またフラックス消費量が増大し好ましくない。一方、２
６％を超えると塩基度が低下し、溶接金属の靭性が劣化
し、また高速水平スミ肉溶接において、ビード形状が凸
となり、スラグ剥離性が劣化する。したがって、Ｓｉｎ
、量は１７〜２６％の範囲とする。
Ａ１１ｌ Ｏ：２５〜４２％
ＡＱ２０．は中性成分であり、スラグの塩基度を下げな
いでスラグの粘性、凝固温度を調整するのに有効な成分
である。しかし、２５％未満では高速水平スミ肉溶接に
おいて等膜性が損なわれ、またアンダーカットも生じ易
いため好ましくない。
一方、４２％を超えると粘性が高くなりすぎてスラグ巻
込みが発生し易く、下向の多層盛突合せ溶接において凸
ビードになり易い、したがって。
ＡＱ２０．量は２５〜４２％の範囲とする。
ＭｇＯ：１３〜２０％
ＭｇＯは塩基性成分であり、溶接金属中（０）を低減す
るのに有効な成分であり、粘性調整剤としての作用も有
している。しかし、１３％未満では溶接金属中（０）の
低減効果が少なく、靭性が劣る。
またビードが蛇行し易く、アンダーカットが発生する。
一方、２０％を超えるとスラブ焼付きが増すと共にポッ
クマークが多発し、またフラックス消費量が増大するの
で好ましくない。したがって、ＭｇＯ量は１３〜２０％
の範囲とする。
Ｔ、Ｍｎ：５〜１０％
Ｍｎはスラグの粘性、凝固温度を調整するのに有効な成
分であるだけでなく、溶接金属中のＭｎ量を調整し、引
張性能、衝撃性能を確保するために必須の成分である。
しかし、５％未満ではアンダーカット及びスラグ焼付き
が発生し易く好ましくない。また、安価な低Ｍｎワイヤ
と組合せた場合、溶接金属中の〔Ｍｎ量量が不足し、引
張強度及び靭性が低下する。一方、１０％を超えるとビ
ードが蛇行し易く、且つフラックス消費量が増大するた
め好ましくない。
なお、Ｍｎ成分は、金属ＭｎやＦ ｅ −Ｍ ｎなどの
化合物及びＭｎＯ，ＭｎＯ２などの酸化物の形でフラッ
クス中に添加されるが、ここではＭｎの総量としてＴ
、 Ｍ ｎで規定することにした。
したがって、Ｔ、Ｍｎ量は５〜１０％の範囲とする。
ＣａＦニア〜２０％
ＣａＦ２は塩基性成分であって、溶接金属中〔ｏ〕を低
下させる効果があると共に、スラグの流動性を調整し、
溶接中のスラグ−メタル間の反応を促進させるために有
効な成分である。しかし、７％未満ではポックマークが
発生し易く、粘性向上に対しても効果が少ない。一方、
２０％を超えるとスラグの流動性が増し、ビードの蛇行
やアンダーカットが発生し、またフラックス消費量が増
大するので好ましくない、したがって、Ｃａ Ｆ２量は
７〜２０％の範囲とする。
Ｔ、ＦｅＯ：０．１〜７．０％
ＦｅＯ成分は粘性調整剤として有効な成分であるが、０
．１％未満ではスラグの粘性が高くなり、高速水平スミ
肉溶接においてアンダーカットやスラブ巻込みが増加す
るため好ましくない。一方、７．０％を超えると溶接金
属中（０）量が増加し、衝撃性能が劣化する。
なお、Ｆｅ○成分はＦｅ−８ｉ、Ｆｅ−Ｍｎなどの化合
物及びＦｅ０１Ｆｅ、０３などの酸化物の形でフラック
ス中に添加されるが、ここではＦｅＯの総量としてＴ、
ＦｅＯで規定することにした。
したがって、Ｔ、ＦｅＯ量は０．１〜７．０％の範囲と
する。
Ｎａ ＯびＫＯの１ 又は２種：０．５〜３．５％Ｎａ
、Ｏ，に、Ｏはアーク安定剤、スラグの粘性調整剤とし
て有効であり、特に高速水平スミ肉溶接においてはアー
ク安定性を確保するためには必須の成分であるので、Ｎ
ａ、Ｏ及びに、Ｏの１種又は２種を添加する。しかし、
０．５％未満ではアークの安定性、集中性が悪くなり、
ビードが蛇行したり、スラグ巻込みが増加する。一方、
３．５％を超えるとフラックスの耐吸湿性が悪くなり。
ピットやポックマークが発生し易い。したがって、Ｎａ
、Ｏ及びに、Ｏの１種又は２種の添加量は０．５〜３．
５％の範囲とする。
Ｔ、ＣＯ：０．０５〜０．５％
ＣＯ□成分は溶接中に発生するｃｏガスで大気をシール
ドし溶接金属中〔Ｎ〕量を低減し、安定化するのに非常
に有効な成分である。ｃＯガスを発生させるためには、
フラックス中にＣａＣ０，やＢａＣ０，などの炭酸塩及
びＣ（炭素）などの形で添加するが、ここではＣＯ２の
総量としてＴ、ＣＯ２で規定することにした。しかし、
Ｔ、ＣＯ□量が０゜０５％未満では溶接金属中（Ｎ）の
低減及び安定化に対して効果がなく、靭性が低下する。
一方、０゜５％を超えると高速水平スミ肉溶接において
ポックマークが発生し易い。したがって、Ｔ、ＣＯ，量
は０．０５〜０．５％の範囲とする。
Ｈ：１０〜５０ｍ
溶接金属中（Ｎ）の低減及び安定化対策のためには、上
記Ｔ、ＣＯ□量の管理だけでは不十分であるので、本発
明では、アーク雰囲気中の（Ｎ）分圧を下げるためにＦ
２の添加を必須とした。しかし、１０ｐｐｍ未満では溶
接金属中（Ｎ）の低減及び安定化に対して効果がなく、
靭性が低下するため好ましくない。一方、５０ＰＰ１１
を超えると溶接金属中の〔Ｈ２〕量が高くなりすぎて、
遅れ割れ等の問題が発生するため好ましくない。また、
ピットも発生し易い。したがって、Ｆ２量は１０〜５Ｑ
ｐｐｍの範囲とする。
なお、上記Ｆ２量はガスクロマトグラフィー法により測
定した量である。例えば、３００℃×１時間の予備乾燥
後、インパルス炉を用いて抽出した水素をガスクロマト
グラフィー法で定量する。
その他の条件としては、特に制限されないが、大気から
のシールド効果を更に高めるためには、フラックス粒度
を、１０メツシユより粗い粒子が全体の５％以下とし、
４８メツシユより細い粒子が全体の８〜３５％とするの
が望ましい。
なお、ボンドフラックスとは、溶融型フラックスとは異
なり、焼成又は焼結して製造されるフッラックス（ボン
ドフラックス）を指している。
また、サブマージアーク溶接条件も特に制限されないが
、高速水平スミ肉溶接及び下向の多層盛突合せ溶接条件
のもとて上記効果が顕著である。
次に本発明の実施例を示す。
（実施例）
第１表に示す化学成分を有する供試ボンドフラックスを
準備した。その際、Ｔ 、 Ｍ ｎ量は金属Ｍ ｎ 。
Ｆｅ−Ｍｎ等の化合物及びＭｎＯ，ＭｎＯ２、Ｍｎ、○
。
等の酸化物により、Ｔ、Ｆｅ０ｆｆｉはＦｅ−Ｍｎ、Ｆ
ｅ−８ｉ等の化合物及びＦｅ０１Ｆｇ２０．等の酸化物
により、Ｔ、ＣＯ２量はＣａＣＯ３，ＢａＣＯ３及びＮ
ａ、Ｃｏ３及びＮａ、ＣＯ３等の炭酸塩により、Ｎ２量
は、例えば、Ｓｉｎ、源として用いる珪砂等に含まれる
結晶水分量、フラックスの固着剤として用いる水硝子の
添加量及びフラックスの焼成温度により、それぞれ含有
量を調整した６
なお、比較例の各フラックスにおいて、Ｎα５はＭｇＯ
とＴ 、 Ｍ ｎが多い例、Ｎａ６はＳｉｏ、とＴ、Ｆ
ｅＯが多い例、Ｎａ７はＡΩ２０．が多くＭｇＯが少な
い例、Ｎａ８はＴ、ＣＯ２とＮ２が多い例、Ｎａ９はＳ
ｉＯ２とＴ、Ｍｎが少なく、ＣａＦ２とＮａ、Ｏ及びに
２０が多い例、Ｎｌｌｌ０はＡＱ、Ｏ，とＴ、ＦｅＯと
Ｎａ、０及びに２０が少ない例、Ｎａ１ｌは’ｒ、ｃ
Ｏ，）ニー Ｈ，が少ない例、Ｎ１１２はＳｉｏ、が多
くＣａＦ、が少ない例である。
尖適盤工
第１表に示した供試フラックスを用い、１２ｍｍｔＸ７
５０ｍＩＱの寸法で第１図に示す開先の母材５Ｓ４１に
、３．２ｍｍφでＪＩＳ Ｚ ３３５１ＹＳ−８３相当
のワイヤを用い、以下の溶接条件でサブマージアーク溶
接を行った。
〈溶接条件〉
単電極水平スミ肉溶接
１ｓｔ ５ｉｄｅ：５５０Ａ−３２Ｖ−８０ｃ腸／ｗｉ
ｎ２ｎｄ ５ｉｄｅ： ｔｔ溶接作業性を
第２表に示す。
第２表より明らかなように１本発明例はいずれも良好な
溶接作業性を有し、ガス欠陥の発生もなかった。
去】１１λ
第１表に示した供試フラックスを用い、２５１Ｉｌｌｔ
Ｘ１０００■■Ｑの寸法で第２図に示すＶ開先の母材５
Ｍ４１Ｂに、４．０ｍｍφでＪＩＳ Ｚ ３３５１
ＹＳ−８３相当のワイヤを用い、以下の溶接条件で
サブマージアーク溶接を行った。
〈溶接条件〉
単電極下向多層溶接
５５０Ａ−２８Ｖ−４０ｃ腸／ｗｉｎ
溶接作業性とＸ線透過試験、衝撃試験結果並びにフラッ
クス消費量を第２表に併記する。
なお、Ｘ線透過試験は、試験板全長を対象として行い、
欠陥の有無を判定した。衝撃試験は、供試材表面９．５
ｍｍよりＪＩＳ Ｚ ３１１１ ４号試験片を採取
し、−５１℃で試験を行い、３本の平均値を求めた。ま
た、フラックス消費量については、全パス溶接終了後、
ワイヤ及びフラックス消費量をそれぞれ測定し、フラッ
クス／ワイヤ消費率を求めて評価した。
第２表より明らかなように、本発明例はいずれも良好な
溶接作業性を有し、ガス欠陥の発生もなく、靭性も優れ
ており、またフラックス消費量も少ない。
なお、第２表において、比較例Ｎα７〜Ｎα８、Ｎα１
０、Ｎ（１１２について衝撃試験結果が記載してないが
、これは、溶接作業性が悪く（スラグ巻込。
ブローホール）、したがって、靭性を確認するまでもな
いと判断し、試験を中止したためである。(Field of Industrial Application) The present invention relates to a bond flux for submerged arc welding, which provides excellent welding workability, economic efficiency, and stable mechanical performance, particularly in high-speed fillet welding and downward multilayer butt welding. The present invention relates to a bond flux composition for submerged arc welding. (Prior Art and Problems to be Solved) In submerged arc welding of horizontal fillet welding, high-speed welding with a relatively small current is generally performed. This is because high-current, low-speed welding does not produce equipodal columns. Conventionally, low-temperature bond fluxes containing carbonates have not been used in such high-speed submerged arc welding due to the generation of gas defects such as pockmarks, blowholes, and pits, and molten fluxes that do not contain carbonates have been used. It was widely used. However, when welding is performed using a molten flux that does not contain carbonates, 1 e.g., CaCO3-*
The CO gas generated by the chemical reaction CaO+CO+O cannot be expected to have a shielding effect from the atmosphere, and as a result, the amount of (N) in the weld metal becomes extremely unstable, resulting in variations in toughness. Furthermore, in the case of a molten flux that does not contain carbonates, similar problems occur in submerged arc welding of downward multilayer butt welding. Furthermore, there was also the problem that the amount of flux used was large, making it uneconomical. The present invention has been made in order to solve the problems of the prior art described above, and even with a bond type flux containing a gas generating component having a shielding effect, there is no occurrence of gas defects and an excellent A weld metal with mechanical performance is obtained,
Another object of the present invention is to provide an economical flux for submerged arc welding that has excellent welding workability. (Means for Solving the Problems) The inventors of the present invention have conducted various studies regarding bond flux in order to address the above-mentioned problems. As a result, we have discovered an economical bond flux for submerged arc welding that provides excellent welding workability and stable mechanical performance, especially in submerged arc welding for high-speed horizontal fillet welding and downward multilayer butt welding. It is. That is, the bond flux for submerged arc welding according to the present invention has Sin,: 17 to 26%, AM, O,
: 25-42%, MgO: 13-20%, T, Mn: 5
~lO%, CaF227~20%, T, Fe○: 0.1
~7.0%, Na2O and 0 (711 types or 2 types =
It is characterized by having a composition containing 0.5 to 3.5%, T, CO: 0.05 to 0.5%, and H2: 10 to 50 ppm. The present invention will be explained in more detail below. (Function) The reasons for limiting the chemical components in the present invention are as follows. Sio: 17-26% Sio is an acidic component and is an effective component for adjusting the viscosity and solidification temperature of the slab. However, if it is less than 17%, the viscosity of the slag is insufficient and the uniformity of the bead width is poor.
Moreover, flux consumption increases, which is not preferable. On the other hand, 2
When it exceeds 6%, the basicity decreases, the toughness of the weld metal deteriorates, and in high-speed horizontal fillet welding, the bead shape becomes convex and slag removability deteriorates. Therefore, Sin
, the amount should be in the range of 17-26%. A11l O: 25-42% AQ20. is a neutral component, and is an effective component for adjusting the viscosity and solidification temperature of the slag without reducing the basicity of the slag. However, if it is less than 25%, the film uniformity is impaired in high-speed horizontal fillet welding, and undercuts are likely to occur, which is not preferable. On the other hand, if it exceeds 42%, the viscosity becomes too high and slag entrainment tends to occur, and convex beads tend to form in downward multilayer butt welding. AQ20. The amount should be in the range 25-42%. MgO: 13-20% MgO is a basic component and is an effective component for reducing (0) in the weld metal, and also functions as a viscosity modifier. However, if it is less than 13%, the effect of reducing (0) in the weld metal is small and the toughness is poor. In addition, the bead tends to meander and undercuts occur. On the other hand, if it exceeds 20%, it is not preferable because it increases slab sticking, pockmarks occur frequently, and flux consumption increases. Therefore, the amount of MgO is 13-20%
The range shall be . T, Mn: 5-10% Mn is an effective component not only for adjusting the viscosity and solidification temperature of slag, but also for adjusting the amount of Mn in the weld metal and ensuring tensile performance and impact performance. It is an essential ingredient. However, if it is less than 5%, undercutting and slag burning tend to occur, which is not preferable. Furthermore, when used in combination with an inexpensive low-Mn wire, the amount of Mn in the weld metal is insufficient, resulting in a decrease in tensile strength and toughness. On the other hand, if it exceeds 10%, the bead tends to meander and flux consumption increases, which is not preferable. The Mn component is added to the flux in the form of metal Mn, compounds such as Fe-Mn, and oxides such as MnO and MnO2, but here, T is the total amount of Mn.
, Mn. Therefore, the amounts of T and Mn are in the range of 5 to 10%. CaF Near - 20% CaF2 is a basic component and has the effect of lowering [o] in the weld metal, as well as adjusting the fluidity of slag.
It is an effective component for promoting the reaction between slag and metal during welding. However, if it is less than 7%, pock marks are likely to occur and there is little effect on improving viscosity. on the other hand,
If it exceeds 20%, the fluidity of the slag will increase, meandering and undercutting of the bead will occur, and flux consumption will increase, which is undesirable.Therefore, the amount of CaF2 is set in the range of 7 to 20%. T, FeO: 0.1-7.0% The FeO component is an effective component as a viscosity modifier, but 0.
．． If it is less than 1%, the viscosity of the slag becomes high and undercuts and slab entrainment increase in high-speed horizontal fillet welding, which is not preferable. On the other hand, if it exceeds 7.0%, the amount of (0) in the weld metal increases and the impact performance deteriorates. Note that the Fe○ component is added to the flux in the form of compounds such as Fe-8i, Fe-Mn, and oxides such as Fe01Fe, 03, but here, the total amount of FeO is T,
It was decided to specify it using FeO. Therefore, the amounts of T and FeO are in the range of 0.1 to 7.0%. Type 1 or 2 of Na O and KO: 0.5-3.5% Na
, O, O is effective as an arc stabilizer and a slag viscosity modifier, and is an essential component to ensure arc stability, especially in high-speed horizontal fillet welding.
One or two types of O are added to a, O, and. but,
If it is less than 0.5%, the stability and concentration of the arc will deteriorate,
Bead meandering and slag entrainment increases. on the other hand,
If it exceeds 3.5%, the moisture absorption resistance of the flux will deteriorate. Pit and pockmarks are likely to occur. Therefore, Na
, O, and the amount of one or two types of O added is 0.5 to 3.
The range shall be 5%. T, CO: 0.05-0.5% CO□ component is a very effective component for shielding the atmosphere with co gas generated during welding, reducing the amount of [N] in the weld metal, and stabilizing it. be. To generate cO gas,
It is added to the flux in the form of carbonates such as CaC0, BaC0, and C (carbon), but here the total amount of CO2 is defined as T and CO2. but,
If the amount of T and CO□ is less than 0°05%, there is no effect on reducing and stabilizing (N) in the weld metal, and the toughness decreases. On the other hand, if it exceeds 0.5%, pock marks are likely to occur during high-speed horizontal fillet welding. Therefore, the amounts of T and CO are in the range of 0.05 to 0.5%. H: 10 to 50 m In order to reduce and stabilize the (N) content in the weld metal, it is not sufficient to manage the above T and CO□ amounts, so in the present invention, the (N) content in the arc atmosphere is F to reduce pressure
The addition of 2 was made essential. However, if it is less than 10 ppm, it is not effective in reducing and stabilizing (N) in the weld metal.
This is not preferable because it reduces toughness. On the other hand, 50PP11
If it exceeds, the amount of [H2] in the weld metal becomes too high,
This is not preferable because it causes problems such as delayed cracking. Also,
Pit is also likely to occur. Therefore, the amount of F2 is 10-5Q
The range shall be ppm. Note that the above amount of F2 is the amount measured by gas chromatography. For example, after preliminary drying at 300° C. for 1 hour, hydrogen extracted using an impulse furnace is quantified by gas chromatography. Other conditions are not particularly limited, but in order to further enhance the shielding effect from the atmosphere, the flux particle size should be 5% or less of the total particles coarser than 10 mesh;
It is desirable that particles finer than 48 mesh account for 8 to 35% of the total. Note that bond flux refers to flux produced by firing or sintering (bond flux), unlike molten flux. Further, although the submerged arc welding conditions are not particularly limited, the above-mentioned effect is remarkable under the conditions of high-speed horizontal fillet welding and downward multilayer butt welding. Next, examples of the present invention will be shown. (Example) A sample bond flux having the chemical components shown in Table 1 was prepared. At that time, the amounts of T and Mn are metal Mn. Compounds such as Fe-Mn and MnO, MnO2, Mn, ○
. T, Fe0ffi can be changed to Fe-Mn, F by oxides such as
Compounds such as e-8i and Fe01Fg20. The amount of T, CO2 is reduced by oxides such as CaCO3, BaCO3 and N
a, Co3 and carbonates such as Na and CO3, the amount of N2 depends on, for example, Sin, the amount of crystal water contained in the silica sand used as the source, the amount of water glass used as a fixing agent for the flux, and the firing temperature of the flux. , the content of each was adjusted6. Note that in each flux of the comparative example, Nα5 is MgO
and T, M An example where there are many n, Na6 is Sio, and T, F
An example with a large amount of eO, Na7 is AΩ20. example where there is a lot of MgO, Na8 is T, CO2 and N2 are large, Na9 is S
An example in which iO2 and T and Mn are small and CaF2 and Na, O and 20 are large, Nlll0 is AQ, O, and T, FeO and Na, 0 and 20 are small, Na1l is 'r, c
O, ) knee H, is an example with a small amount, and N112 is an example with a large amount of Sio and a small amount of CaF. Point fitting board work Using the sample flux shown in Table 1, 12mmtX7
Submerged arc welding was performed on a base material 5S41 having a groove size of 50 mIQ as shown in FIG. 1 using a wire having a diameter of 3.2 mm and corresponding to JIS Z 3351YS-83 under the following welding conditions. <Welding conditions> Single electrode horizontal fillet welding 1st 5ide: 550A-32V-80c intestine/wi
n2nd 5ide: tt welding workability is shown in Table 2. As is clear from Table 2, all of the examples of the present invention had good welding workability and no gas defects occurred. ] 11λ Using the test flux shown in Table 1, 251Illt
Base material 5 with V groove shown in Fig. 2 with dimensions of X1000■■Q
M41B, 4.0mmφ, JIS Z 3351
Submerged arc welding was performed using a wire equivalent to YS-83 under the following welding conditions. <Welding conditions> Single electrode downward multilayer welding 550A-28V-40c/win Welding workability, X-ray transmission test, impact test results, and flux consumption are also listed in Table 2. In addition, the X-ray transmission test was performed on the entire length of the test plate,
The presence or absence of defects was determined. In the impact test, the surface of the specimen material was 9.5
JIS Z 3111 No. 4 test pieces were taken from mm and tested at -51°C, and the average value of the three pieces was determined. Regarding flux consumption, after all pass welding is completed,
The wire and flux consumptions were each measured, and the flux/wire consumption ratio was determined and evaluated. As is clear from Table 2, all the examples of the present invention have good welding workability, no gas defects occur, excellent toughness, and low flux consumption. In addition, in Table 2, comparative examples Nα7 to Nα8, Nα1
The impact test results are not listed for 0, N (112), but this is because the welding workability was poor (slag entrainment, blowholes), so it was judged that there was no need to check the toughness, and the test was discontinued. It is.
（発明の効果）
以上詳述したように、本発明によれば、ｃｏ２、Ｈ２等
のガス発生成分を含有するボンドブラックスであるが、
優れた溶接作業性と安定した機械的性能が得られ、更に
フラックス消費量が少ないので経済性に優れている。特
に高速水平スミ肉溶接や、下向の多層盛突合せ溶接のサ
ブマージアーク溶接用フラックスに好適である。(Effects of the Invention) As detailed above, according to the present invention, bond blacks containing gas generating components such as CO2 and H2,
It provides excellent welding workability and stable mechanical performance, and is also economical because it consumes little flux. It is particularly suitable as a flux for high-speed horizontal fillet welding and submerged arc welding for downward multilayer butt welding.
第１図及び第２図は実施例で用いた開先形状。 寸法（ｉｎ）を示す説明図である。 特許出願人 株式会社神戸製鋼所 代理人弁理士 中 村 尚 Figures 1 and 2 show the groove shapes used in the examples. It is an explanatory view showing dimensions (in). Patent applicant: Kobe Steel, Ltd. Representative Patent Attorney Takashi Nakamura
Claims (1)
Ａｌ＿２Ｏ＿３：２５〜４２％、ＭｇＯ：１３〜２０％
、Ｔ、Ｍｎ：５〜１０％、ＣａＦ＿２：７〜２０％、Ｔ
、ＦｅＯ：０．１〜７．０％、Ｎａ＿２Ｏ及びＫ＿２Ｏ
の１種又は２種：０．５〜３．５％、Ｔ、ＣＯ＿２：０
．０５〜０．５％及びＨ＿２：１０〜５０ｐｐｍを含む
組成からなることを特徴とするサブマージアーク溶接用
ボンドフラックス。In weight% (hereinafter the same), SiO_2: 17 to 26%,
Al_2O_3: 25-42%, MgO: 13-20%
, T, Mn: 5-10%, CaF_2: 7-20%, T
, FeO: 0.1-7.0%, Na_2O and K_2O
One or two of: 0.5-3.5%, T, CO_2: 0
．． A bond flux for submerged arc welding characterized by having a composition containing 0.05 to 0.5% and H_2: 10 to 50 ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1101246A JP2544479B2 (en) | 1989-04-19 | 1989-04-19 | Bond flux for submerged arc welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1101246A JP2544479B2 (en) | 1989-04-19 | 1989-04-19 | Bond flux for submerged arc welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02280996A true JPH02280996A (en) | 1990-11-16 |
| JP2544479B2 JP2544479B2 (en) | 1996-10-16 |
Family
ID=14295548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1101246A Expired - Fee Related JP2544479B2 (en) | 1989-04-19 | 1989-04-19 | Bond flux for submerged arc welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2544479B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100462037B1 (en) * | 2000-07-10 | 2004-12-16 | 현대종합금속 주식회사 | Flux for using butt submerged arc welding |
| KR100550334B1 (en) * | 2001-12-28 | 2006-02-09 | 현대종합금속 주식회사 | Submerged arc welding flux |
| WO2015019684A1 (en) * | 2013-08-05 | 2015-02-12 | 株式会社神戸製鋼所 | Flux for submerged arc welding |
| JP2016140888A (en) * | 2015-02-02 | 2016-08-08 | 株式会社神戸製鋼所 | Flux for submerged arc welding |
| EP3081328A4 (en) * | 2013-12-13 | 2017-08-30 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Flux for submerged arc welding |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5116172A (en) * | 1974-07-30 | 1976-02-09 | Toyomatsu Nishimura | Gasukonronadono nisuiguooibuta |
| JPS589795A (en) * | 1981-07-10 | 1983-01-20 | Nippon Steel Corp | Flux for submerged arc welding by belt-like electrode |
-
1989
- 1989-04-19 JP JP1101246A patent/JP2544479B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5116172A (en) * | 1974-07-30 | 1976-02-09 | Toyomatsu Nishimura | Gasukonronadono nisuiguooibuta |
| JPS589795A (en) * | 1981-07-10 | 1983-01-20 | Nippon Steel Corp | Flux for submerged arc welding by belt-like electrode |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100462037B1 (en) * | 2000-07-10 | 2004-12-16 | 현대종합금속 주식회사 | Flux for using butt submerged arc welding |
| KR100550334B1 (en) * | 2001-12-28 | 2006-02-09 | 현대종합금속 주식회사 | Submerged arc welding flux |
| WO2015019684A1 (en) * | 2013-08-05 | 2015-02-12 | 株式会社神戸製鋼所 | Flux for submerged arc welding |
| JP2015030019A (en) * | 2013-08-05 | 2015-02-16 | 株式会社神戸製鋼所 | Flux for submerged arc welding |
| CN105408054A (en) * | 2013-08-05 | 2016-03-16 | 株式会社神户制钢所 | Flux for submerged arc welding |
| US10272528B2 (en) | 2013-08-05 | 2019-04-30 | Kobe Steel, Ltd. | Flux for submerged arc welding |
| EP3081328A4 (en) * | 2013-12-13 | 2017-08-30 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Flux for submerged arc welding |
| JP2016140888A (en) * | 2015-02-02 | 2016-08-08 | 株式会社神戸製鋼所 | Flux for submerged arc welding |
| WO2016125568A1 (en) * | 2015-02-02 | 2016-08-11 | 株式会社神戸製鋼所 | Flux for use in submerged arc welding |
| CN107206551A (en) * | 2015-02-02 | 2017-09-26 | 株式会社神户制钢所 | Solder flux used for submerged arc welding |
| EP3254798A4 (en) * | 2015-02-02 | 2018-07-11 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Flux for use in submerged arc welding |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2544479B2 (en) | 1996-10-16 |
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