JP4838100B2 - Flux-cored wire for horizontal corner gas shielded arc welding for weathering steel - Google Patents
Flux-cored wire for horizontal corner gas shielded arc welding for weathering steel Download PDFInfo
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- 238000003466 welding Methods 0.000 title claims description 40
- 229910000870 Weathering steel Inorganic materials 0.000 title description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 10
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 10
- 230000004907 flux Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 229910001512 metal fluoride Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 description 47
- 239000002184 metal Substances 0.000 description 47
- 239000002893 slag Substances 0.000 description 40
- 239000011324 bead Substances 0.000 description 32
- 239000007789 gas Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 14
- 229910052804 chromium Inorganic materials 0.000 description 10
- 229910052802 copper Inorganic materials 0.000 description 10
- 230000007423 decrease Effects 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010936 titanium Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 229910052748 manganese Inorganic materials 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 4
- 150000002222 fluorine compounds Chemical class 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 229910018134 Al-Mg Inorganic materials 0.000 description 2
- 229910018467 Al—Mg Inorganic materials 0.000 description 2
- 229910002551 Fe-Mn Inorganic materials 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 1
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910017082 Fe-Si Inorganic materials 0.000 description 1
- 229910017133 Fe—Si Inorganic materials 0.000 description 1
- -1 Mg and Al—Mg Chemical class 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910006639 Si—Mn Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001610 cryolite Inorganic materials 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- GROMGGTZECPEKN-UHFFFAOYSA-N sodium metatitanate Chemical compound [Na+].[Na+].[O-][Ti](=O)O[Ti](=O)O[Ti]([O-])=O GROMGGTZECPEKN-UHFFFAOYSA-N 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- Nonmetallic Welding Materials (AREA)
Description
本発明は、４００〜５７０Ｎ／ｍｍ２級の耐候性鋼用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、特に水平すみ肉溶接において、アーク状態が良好でスパッタ発生量が少なく良好なスラグ剥離性およびビード形状が得られるとともに溶接金属の機械的性能の優れた耐候性鋼用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。 The present invention relates to 400~570N / mm 2 class gas shielded arc welding flux cored wire for weathering steel, especially in the horizontal fillet welding, good spatter arc state less good slag removability and the good bead The present invention relates to a flux-cored wire for gas shielded arc welding for weathering steel, which has a shape and an excellent weld metal mechanical performance.
耐候性鋼は、鋼材の表面が大気腐食により錆層を形成し、それよりも深層への腐食を抑制する鋼材であり、特に鉄骨・橋梁分野において多く適用されている。これらの溶接は水平すみ肉姿勢溶接が多く、溶接作業性に優れたガスシールドアーク溶接用フラックス入りワイヤが求められている。 Weather-resistant steel is a steel material in which the surface of the steel material forms a rust layer due to atmospheric corrosion and suppresses corrosion to a deeper layer than that, and is widely applied particularly in the field of steel frames and bridges. Many of these weldings are horizontal fillet position welding, and a flux-cored wire for gas shield arc welding excellent in welding workability is required.
耐候性鋼用ガスシールドアーク溶接用フラックス入りワイヤは、ＪＩＳ Ｚ ３３２０規定されており、一般に使用されている軟鋼および４９０Ｎ／ｍｍ２級水平すみ肉溶接用フラックス入りワイヤに適量のＮｉ、ＣｒおよびＣｕを添加した各種溶接用フラックス入りワイヤが適用されている。 The flux-cored wire for gas shielded arc welding for weathering steel is specified in JIS Z 3320. Appropriate amounts of Ni, Cr, and Cu are used for commonly used mild steel and 490 N / mm grade 2 horizontal fillet welding flux-cored wire. Various types of flux-cored wires for welding to which is added are applied.
例えば、フラックス入りワイヤ成分（例えば、特許文献１〜３参照）に上記Ｎｉ、ＣｒおよびＣｕを適量添加して適用されている。 For example, an appropriate amount of Ni, Cr and Cu is added to a flux-cored wire component (see, for example, Patent Documents 1 to 3).
しかし、Ｎｉ、ＣｒおよびＣｕを添加した上記水平すみ肉溶接用フラックス入りワイヤを用いた場合、スラグの流動性が良くなってスラグの被包が悪くなってスラグ剥離性が不良となるとともにビード形状が不良となり満足できるものではなかった。 However, when the above-mentioned horizontal fillet welding flux-cored wire added with Ni, Cr and Cu is used, the flowability of the slag is improved, the encapsulation of the slag is deteriorated, and the slag peelability is deteriorated and the bead shape Was bad and was not satisfactory.
一方、耐候性鋼溶接用フラックス入りワイヤは種々提案されているが（例えば、特許文献４〜６参照）、これらはいずれも下向または立向姿勢における多層盛溶接用のフラックス入りワイヤであり、水平すみ肉溶接に適用した場合、溶接金属が垂れやすく凸ビードとなるという問題があった。 On the other hand, various flux-cored wires for welding weather-resistant steel have been proposed (see, for example, Patent Documents 4 to 6), all of which are flux-cored wires for multi-layer welding in a downward or vertical posture, When applied to horizontal fillet welding, there is a problem that the weld metal tends to sag and forms a convex bead.
本発明は、４００〜５７０Ｎ／ｍｍ２級の耐候性鋼の水平すみ肉溶接において、アーク状態が良好でスパッタ発生量が少なく良好なスラグ剥離性およびビード形状が得られるとともに溶接金属の機械的性能の優れた耐候性鋼用ガスシールドアーク溶接用フラックス入りワイヤを提供することを目的とする。 In the horizontal fillet welding of 400 to 570 N / mm grade 2 weatherproof steel, the present invention provides good slag releasability and bead shape with a good arc state and low spatter generation, and mechanical performance of weld metal. An object of the present invention is to provide a flux-cored wire for gas shielded arc welding for weathering steel having excellent resistance.
本発明者らは、Ｎｉ、ＣｒおよびＣｕを含む種々の耐候性鋼用ガスシールドアーク溶接用フラックス入りワイヤを耐候性鋼の水平すみ肉溶接に適用し、アーク状態、スパッタ発生量、スラグ剥離性、ビード形状および耐ピット性等におよぼす影響について鋭意研究した。その結果、ワイヤ中に含有されるＴｉＯ２、ＳｉＯ２およびＺｒＯ２量を適量にし、また、Ｍｎ／ＳｉおよびＡｌ／Ｍｇを適正にし、さらに、生成スラグ量を抑えることにより、アーク状態が良好でスパッタ発生量が少なく良好なスラグ剥離性およびビード形状が得られるとともに溶接金属の機械的性能の優れた耐候性鋼用ガスシールドアーク溶接用フラックス入りワイヤが得られることを見出して、本発明を完成した。 The inventors applied various flux-cored wires for gas shielded arc welding for weathering steel containing Ni, Cr and Cu to horizontal fillet welding of weathering steel, and the arc state, spatter generation amount, slag peelability In addition, we have intensively studied the effects on bead shape and pit resistance. As a result, the amount of TiO 2 , SiO 2 and ZrO 2 contained in the wire is set appropriately, Mn / Si and Al / Mg are set appropriately, and the amount of generated slag is suppressed, so that the arc state is good. The present invention was completed by finding that a flux-cored wire for gas-shielded arc welding for weatherproof steel with excellent spatter generation and good slag peelability and bead shape and excellent mechanical properties of weld metal was obtained. did.
本発明の要旨は、鋼製外皮にフラックスを充填してなる耐候性鋼用水平すみ肉ガスシールドアーク溶接用フラックス入りワイヤにおいて、ワイヤ全質量に対する質量で、Ｔｉ酸化物のＴｉＯ２換算：２．０〜４．０％、ＳｉＯ２：０．５〜１．５％、ＺｒＯ２：０．１〜０．６％、 金属弗化物のＦ換算値：０．０２〜０．０８％、Ｃ：０．０２〜０．０８％、Ｓｉ：０．３〜０．７％、Ｍｎ：１．５〜２．５％、かつ、Ｍｎ／Ｓｉ：２．５〜６．０、Ａｌ：０．１５〜０．５％、Ｍｇ：０．１５〜０．５％、かつ、Ａｌ／Ｍｇ：０．３〜３．０、Ｎｉ：０．３〜０．７％、Ｃｒ：０．４５〜０．８％、Ｃｕ：０．３〜０．６％を含有し、残部はＦｅ、アーク安定剤および不可避不純物であることを特徴とする耐候性鋼用水平すみ肉ガスシールドアーク溶接用フラックス入りワイヤにある。 The gist of the present invention is that, in a flux cored wire for horizontal fillet gas shielded arc welding for weatherproof steel, in which a steel outer shell is filled with flux, the mass with respect to the total mass of the wire and the Ti oxide in terms of TiO 2 : 2. 0 to 4.0%, SiO 2 : 0.5 to 1.5%, ZrO 2 : 0.1 to 0.6%, F conversion value of metal fluoride: 0.02 to 0.08%, C: 0.02 to 0.08%, Si: 0.3 to 0.7%, Mn: 1.5 to 2.5%, and Mn / Si: 2.5 to 6.0, Al: 0.15 -0.5%, Mg: 0.15-0.5%, Al / Mg: 0.3-3.0, Ni: 0.3-0.7%, Cr: 0.45-0. 8% Cu: contains 0.3 to 0.6%, the balance being Fe, corner horizontal for weathering steel, characterized in that an arc stabilizers and unavoidable impurities meat Gasushi In the flux-cored wire for Rudoaku welding.
本発明の耐候性鋼用ガスシールド溶接用フラックス入りワイヤによれば、４００〜５７０Ｎ／ｍｍ２級の耐候性鋼の水平すみ肉溶接に適用してもアーク状態が良好で、スパッタの発生量が少なく、スラグがビード上に均一に被包するため優れたスラグ剥離性およびビード形状を得ることができる。また、軟鋼および４９０Ｎ／ｍｍ２級水平すみ肉用フラックス入りワイヤと同等の耐ピット性が得られるとともに溶接金属の機械的性能が優れており、高品質の溶接部が得られる。 According to the flux-cored wire for gas shield welding for weathering steel of the present invention, the arc state is good even when applied to horizontal fillet welding of 400 to 570 N / mm grade 2 weathering steel, and the amount of spatter generated is high. Less, since the slag is uniformly encapsulated on the bead, excellent slag releasability and bead shape can be obtained. Moreover, the same pit resistance as that of the flux-cored wire for mild steel and 490 N / mm class 2 horizontal fillet is obtained, and the mechanical performance of the weld metal is excellent, so that a high-quality weld is obtained.
本発明者らは、Ｎｉ、ＣｒおよびＣｕを含む種々の耐候性鋼用ガスシールドアーク溶接用フラックス入りワイヤを試作して、耐候性鋼の水平すみ肉溶接に適用し、アーク状態、スパッタ発生量、スラグ剥離性、ビード形状および耐ピット性等におよぼす影響を調べた。 The inventors have made various types of flux-cored wires for gas shielded arc welding for weathering steel containing Ni, Cr, and Cu, and applied them to horizontal fillet welding of weathering steel. The effects on slag peelability, bead shape and pit resistance were investigated.
その結果、ＴｉＯ２、ＳｉＯ２およびＺｒＯ２量を適量にすることにより、アークが安定してスラグ被包が均一でスラグ剥離性が良好になることを見いだした。また、Ｍｎ／ＳｉおよびＡｌ／Ｍｇを適正にすることによって、良好なビード形状が得られることを見いだした。さらに、生成スラグ量を抑えることにより優れた耐ピット性が得られることを見出した。 As a result, it was found that by adjusting the amounts of TiO 2 , SiO 2, and ZrO 2 to appropriate amounts, the arc is stable, the slag encapsulation is uniform, and the slag peelability is improved. Moreover, it discovered that a favorable bead shape was obtained by making Mn / Si and Al / Mg appropriate. Furthermore, it has been found that excellent pit resistance can be obtained by suppressing the amount of generated slag.
以下、本発明の耐候性鋼用ガスシールドアーク溶接用フラックス入りワイヤの成分組成およびその含有量の限定理由について説明する。なお、以下に述べる各成分組成の含有量は、ワイヤ全質量に対する質量％で示す。 Hereinafter, the component composition of the flux-cored wire for gas shielded arc welding for weathering steel of the present invention and the reason for limiting the content thereof will be described. In addition, content of each component composition described below is shown by the mass% with respect to the wire total mass.
（Ｔｉ酸化物のＴｉＯ２換算値：２．０〜４．０％）
ＴｉＯ２は、スラグ形成剤の主成分であり、Ｔｉ酸化物のルチール、酸化チタン、チタン酸ソーダ、チタンスラグ、イルミナイト等から添加される。これらはビード全体を均一に包被してビード形状を整える作用を有する。また、アークを持続して安定させスパッタ発生量を低減させる効果がある。Ｔｉ酸化物のＴｉＯ２換算値が２．０％未満であると、スラグ生成量が不足してビードを均一に包被できないためスラグ剥離が悪くビード形状を整えることができなくなる。また、アークを安定させる効果がなくなりスパッタ発生量も増加する。一方、４．０％を超えると、アークは安定してスパッタ発生量は減少するが、ビード形状が垂れて凸ビードになりやすくなる。また、スラグが厚くなりガスの放出が阻害されるので、耐ピット性が悪くなる。
(TiO 2 converted value of Ti oxides: 2.0 to 4.0%)
TiO 2 is a main component of the slag forming agent, and is added from rutile of Ti oxide, titanium oxide, sodium titanate, titanium slag, illuminite, and the like. These have the effect | action which covers the whole bead uniformly and arranges a bead shape. Further, there is an effect that the arc is sustained and stabilized to reduce the amount of spatter generated. If the TiO 2 equivalent value of the Ti oxide is less than 2.0%, the amount of slag generation is insufficient and the beads cannot be uniformly encapsulated, so that the slag peeling is poor and the bead shape cannot be adjusted. Further, the effect of stabilizing the arc is lost and the amount of spatter generated increases. On the other hand, if it exceeds 4.0%, the arc is stabilized and the amount of spatter generated decreases, but the bead shape hangs down and becomes a convex bead. In addition, the slag becomes thick and gas release is hindered, resulting in poor pit resistance.
（ＳｉＯ２：０．５〜１．５％）
ＳｉＯ２は、珪砂、ジルコンサンド等より添加されスラグ形成剤として作用し、少量でスラグ粘性を大きくする効果がある。ＳｉＯ２が０．５％未満であるとスラグ形成剤としての効果が無くスラグ被包性が悪くなりスラグ剥離およびビード形状が劣化する。一方、１．５％を超えるとスラグの粘性が増大しガスの放出が阻害されるので、耐ピット性が悪くなる。また、アークも荒くなりスパッタ発生量が多くなる。
(SiO 2: 0.5~1.5%)
SiO 2 is added from silica sand, zircon sand or the like and acts as a slag forming agent, and has an effect of increasing the slag viscosity with a small amount. When SiO 2 is less than 0.5%, there is no effect as a slag forming agent, and the slag encapsulation is deteriorated, and the slag peeling and the bead shape are deteriorated. On the other hand, if it exceeds 1.5%, the viscosity of the slag increases and the gas release is inhibited, so that the pit resistance is deteriorated. Moreover, the arc becomes rough and the amount of spatter generated increases.
（ＺｒＯ２：０．１〜０．６％）
ＺｒＯ２は、ジルコンサンドおよび酸化ジルコニウム等より添加され、少量でスラグ被包性を改善してビード形状を改善するスラグ形成剤として作用する。ＺｒＯ２を添加することによりスラグの凝固温度が高くなりスラグの凝固が早くなるが、他のスラグ形成剤と比較して、その添加量が同量であっても生成スラグの厚みが薄くなるので耐ピット性に有効である。ＺｒＯ２が０．１％未満であるとスラグ厚みが増加するので耐ピット性が悪くなる。一方、０．６％を超えるとアークが荒くなりスパッタ発生量が多くなるとともに、スラグが硬くなりビードにスラグが均一に被包し難くなるのでスラグ剥離性が悪くなる。
(ZrO 2 : 0.1 to 0.6%)
ZrO 2 is added from zircon sand, zirconium oxide or the like, and acts as a slag forming agent that improves the slag encapsulation by a small amount and improves the bead shape. By adding ZrO 2 , the solidification temperature of the slag is increased and the solidification of the slag is accelerated. However, compared to other slag forming agents, the thickness of the generated slag is reduced even if the addition amount is the same. Effective for pit resistance. If ZrO 2 is less than 0.1%, the slag thickness increases, so the pit resistance deteriorates. On the other hand, if it exceeds 0.6%, the arc becomes rough and the amount of spatter generated increases, and the slag becomes hard and it becomes difficult to uniformly encapsulate the slag in the bead, so that the slag peelability is deteriorated.
（金属弗化物のＦ換算値：０．０２〜０．０８％）
Ｆは、弗化ソーダ、珪弗化カリ、氷晶石、弗化アルミ、弗化リチウムおよびホタル石等より添加され、アークの安定性を向上させる。金属弗化物のＦ換算値が０．０２％未満であるとアークの集中性が弱くなり安定したアーク状態を得ることができな。一方、０．０８％を超えるとアークが荒くなりヒュームおよびスパッタ発生量が多くなる。
(F value of metal fluoride: 0.02 to 0.08%)
F is added from sodium fluoride, potassium silicofluoride, cryolite, aluminum fluoride, lithium fluoride, fluorite, etc., and improves the stability of the arc. If the F-converted value of the metal fluoride is less than 0.02%, the arc concentration becomes weak and a stable arc state cannot be obtained. On the other hand, if it exceeds 0.08%, the arc becomes rough and the generation amount of fume and spatter increases.
（Ｃ：０．０２〜０．０８％）
Ｃは、鋼製外皮、Ｆｅ−Ｍｎおよびグラファイト等より添加され、溶接金属の強度を調整する重要な元素の１つである。Ｃが０．０２％未満であると溶接金属の強度および靭性が低下する。一方、０．０８％を超えるとアークが強くなりすぎてスパッタ発生量が多くなる。また、溶接金属の強度が高くなり靭性が低下する。
(C: 0.02-0.08%)
C is one of important elements that are added from a steel outer shell, Fe-Mn, graphite and the like and adjust the strength of the weld metal. When C is less than 0.02%, the strength and toughness of the weld metal are lowered. On the other hand, if it exceeds 0.08%, the arc becomes too strong and the amount of spatter generated increases. In addition, the strength of the weld metal increases and the toughness decreases.
（Ｓｉ：０．３〜０．７％）
Ｓｉは、金属Ｓｉ、Ｆｅ-ＳｉおよびＦｅ-Ｓｉ-Ｍｎ等より添加され、脱酸剤として作用して溶接金属の強度および靭性を確保するために添加する。Ｓｉが０．３％未満であると脱酸不足となり溶接部にピット等の溶接欠陥が発生する。また、強度および靭性が低下する。一方、０．７％を超えると溶接金属の強度が高くなり靭性が低下する。
(Si: 0.3-0.7%)
Si is added from metals Si, Fe-Si, Fe-Si-Mn, and the like, and is added to act as a deoxidizer to ensure the strength and toughness of the weld metal. If Si is less than 0.3%, deoxidation is insufficient, and welding defects such as pits occur in the welded portion. In addition, strength and toughness are reduced. On the other hand, if it exceeds 0.7%, the strength of the weld metal increases and the toughness decreases.
（Ｍｎ：１．５〜２．５％）
Ｍｎは、金属Ｍｎ、Ｆｅ−Ｍｎおよび鋼製外皮等より添加され、脱酸剤として作用するとともに溶接金属の強度および靭性を確保するために添加する。Ｍｎが１．５％未満であると脱酸不足となり溶接部にピット等の溶接欠陥が発生する。また、溶接金属の強度および靭性が低下する。一方、２．５％を超えると溶接金属の強度が高くなり靭性が低下する。
(Mn: 1.5-2.5%)
Mn is added from metal Mn, Fe-Mn, steel outer shell, etc., and acts to act as a deoxidizer and to ensure the strength and toughness of the weld metal. If Mn is less than 1.5%, deoxidation is insufficient, and welding defects such as pits occur in the weld. Moreover, the strength and toughness of the weld metal are reduced. On the other hand, if it exceeds 2.5%, the strength of the weld metal increases and the toughness decreases.
（Ｍｎ／Ｓｉ：２．５〜６．０）
Ｍｎ／Ｓｉは、溶接金属の粘性に影響する。Ｍｎ／Ｓｉが大きくなれば溶接金属の粘性が低下し、逆にＭｎ／Ｓｉが小さくなると溶接金属の粘性は高くなる。溶接金属の粘性を低くすると溶接金属中から発生するガスを早く抜けさせるので、耐ピット性を向上させることができる。Ｍｎ／Ｓｉが２．５未満であるとＳｉに対するＭｎ量が少なくなるので靭性が劣化する。一方、６．０を超えると溶接金属の粘性が低くなりすぎてビード形状が凸になる。
(Mn / Si: 2.5-6.0)
Mn / Si affects the viscosity of the weld metal. As Mn / Si increases, the viscosity of the weld metal decreases. Conversely, when Mn / Si decreases, the viscosity of the weld metal increases. When the viscosity of the weld metal is lowered, the gas generated from the weld metal is quickly released, so that the pit resistance can be improved. If Mn / Si is less than 2.5, the amount of Mn with respect to Si is reduced, so that toughness deteriorates. On the other hand, if it exceeds 6.0, the viscosity of the weld metal becomes too low and the bead shape becomes convex.
（Ａｌ：０．１５〜０．５％）
Ａｌは、金属Ａｌ、Ｆｅ−ＡｌおよびＡｌ-Ｍｇ等から添加され、脱酸剤として作用するとともにＳｉ、Ｍｎの溶接金属中への歩留まりを上げて強度および靭性を調整する効果を有する。また、溶接金属の粘性を上げる作用を有しビード形状を整える効果がある。Ａｌが０．１５％未満であると脱酸剤としての効果が少なく溶接部にピット等の溶接欠陥が発生する。また、溶接金属の粘性が低下するためにビード形状が劣化する。一方、０．５％を超えるとアークの集中性が高くなりすぎるためスパッタ発生量が多くなる。また、強度が高くなりすぎて靭性が低下する。
(Al: 0.15-0.5%)
Al is added from metals Al, Fe—Al, Al—Mg, and the like, and acts as a deoxidizer and has the effect of adjusting the strength and toughness by increasing the yield of Si and Mn into the weld metal. Moreover, it has the effect of increasing the viscosity of the weld metal and has the effect of adjusting the bead shape. If the Al content is less than 0.15%, the effect as a deoxidizer is small, and welding defects such as pits occur in the welded portion. In addition, the bead shape deteriorates because the viscosity of the weld metal decreases. On the other hand, if it exceeds 0.5%, the concentration of arc becomes too high and the amount of spatter generated increases. Further, the strength becomes too high and the toughness is lowered.
（Ｍｇ：０．１５〜０．５％）
Ｍｇは、金属Ｍｇ、Ａｌ-Ｍｇ等から添加され、脱酸剤として作用するとともにＳｉ、Ｍｎの溶接金属への歩留まりを上げて強度および靭性を調整する効果を有する。Ｍｇが０．１５％未満であると脱酸剤としての効果がなく溶接部にピット等の溶接欠陥が発生する。一方、０．５％を超えるとアークが荒くなりスパッタ発生量が多くなる。
(Mg: 0.15-0.5%)
Mg is added from metals such as Mg and Al—Mg, and acts as a deoxidizer and has the effect of adjusting the strength and toughness by increasing the yield of Si and Mn to the weld metal. If Mg is less than 0.15%, there is no effect as a deoxidizing agent, and welding defects such as pits occur in the weld. On the other hand, if it exceeds 0.5%, the arc becomes rough and the amount of spatter generated increases.
（Ａｌ／Ｍｇ：０．３〜３．０）
Ａｌ／Ｍｇは、溶接金属の粘性に影響する。Ａｌ／Ｍｇが大きくなれば溶接金属の粘性が高くなり、逆にＡｌ／Ｍｇが小さくなると溶接金属の粘性は低下する。Ａｌ／Ｍｇが０．３未満であると溶接金属の粘性が低くなるのでビード形状が垂れ気味になる。一方、３．０を超えると靭性が低下する。
(Al / Mg: 0.3-3.0)
Al / Mg affects the viscosity of the weld metal. If Al / Mg is increased, the viscosity of the weld metal is increased. Conversely, if Al / Mg is decreased, the viscosity of the weld metal is decreased. If Al / Mg is less than 0.3, the viscosity of the weld metal becomes low, and the bead shape drips. On the other hand, if it exceeds 3.0, the toughness decreases.
（Ｎｉ：０．３〜０．７％、Ｃｒ：０．４５〜０．８％、Ｃｕ：０．３〜０．６％）
Ｎｉ、Ｃｒ、Ｃｕは金属Ｎｉ、金属Ｃｒ、金属Ｃｕ等から添加され、溶接金属が耐候性の性能を有するために必須である。Ｎｉが０．３％未満、Ｃｒが０．４５％未満およびＣｕが０．３％未満であると耐候性の性能を満足することができない。一方、Ｎｉが０．７％超、Ｃｒが０．８％超およびＣｕが０．６％を超えると強度が高くなりすぎる。また、コストが高くなりすぎ経済的ではない。
(Ni: 0.3-0.7%, Cr: 0.45-0.8%, Cu: 0.3-0.6%)
Ni, Cr, and Cu are added from metal Ni, metal Cr, metal Cu, and the like, and are essential for the weld metal to have weather resistance performance. When Ni is less than 0.3%, Cr is less than 0.45% and Cu is less than 0.3%, the weather resistance performance cannot be satisfied. On the other hand, if Ni exceeds 0.7%, Cr exceeds 0.8% and Cu exceeds 0.6%, the strength becomes too high. Also, the cost is too high and it is not economical.
以下、実施例により本発明の効果をさらに詳細に説明する。 Hereinafter, the effect of the present invention will be described in more detail with reference to examples.
まず、鋼製外皮にＪＩＳ Ｇ３１４１ ＳＰＣＣ帯鋼を使用し、表１に示すワイヤ径１．２ｍｍの各種成分のガスシールドアーク溶接用フラックス入りワイヤを試作した。 First, JIS G3141 SPCC band steel was used for the steel outer sheath, and various flux-cored wires for gas shield arc welding having various wire diameters of 1.2 mm shown in Table 1 were produced.
表１に示す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、板厚１２ｍｍの耐候性鋼板（ＪＩＳ Ｇ３１１４ ＳＭＡ４９０ＢＷ）をＴ字すみ肉試験体（長さ１０００ｍｍ）とし、表２に示す条件Ｎｏ．１の溶接条件で水平すみ肉溶接を行い、アーク状態、スパッタ発生量、スラグ剥離性およびビード形状を調査した。スパッタ発生量の測定は、発生したスパッタ全量を捕集し、１分間当たりの発生量に換算した。なお、耐候性鋼板でのスパッタ発生量は２ｇ／ｍｉｎ以下が良好である。 Using the flux-cored wire for gas shielded arc welding shown in Table 1, a weather-resistant steel plate (JIS G3114 SMA490BW) having a thickness of 12 mm was used as a T-shaped fillet specimen (length 1000 mm). Horizontal fillet welding was performed under the welding conditions of No. 1, and the arc state, spatter generation amount, slag peelability, and bead shape were investigated. For the measurement of the amount of spatter generated, the total amount of spatter generated was collected and converted to the amount generated per minute. Note that the amount of spatter generated in the weather-resistant steel plate is preferably 2 g / min or less.
また、耐ピット性の評価は、板厚１２ｍｍの無機ジンクプライマ塗布鋼板（ＪＩＳ Ｇ３１１４ ＳＭＡ４９０ＢＷ、プライマ膜厚３５〜４０μｍ）をＴ字すみ肉試験体（長さ１０００ｍｍ）とし、片側づつ両側に表２に示す条件Ｎｏ．１の溶接条件で水平すみ肉溶接を行い、発生したピット数を調査した。 In addition, the evaluation of pit resistance was carried out by using a 12 mm-thick inorganic zinc primer coated steel sheet (JIS G3114 SMA490BW, primer film thickness 35-40 μm) as a T-shaped fillet specimen (length 1000 mm). Condition No. shown in FIG. Horizontal fillet welding was performed under the welding conditions of 1 and the number of generated pits was investigated.
さらに、ＪＩＳ Ｚ ３３２０に準じて板厚２０ｍｍの耐候性鋼板（ＪＩＳ Ｇ３１１４ ＳＭＡ４９０ＢＷ）を用いて溶着金属試験を表２に示す条件Ｎｏ．２の溶接条件で行い、引張試験片と衝撃試験片を採取して試験した。なお、引張強さは４９０Ｎ／ｍｍ２以上、吸収エネルギーは０℃で７０Ｊ以上を良好とした。それらの調査結果を表３にまとめて示す。 Furthermore, a weld metal test using a weather-resistant steel plate (JIS G3114 SMA490BW) having a thickness of 20 mm according to JIS Z 3320 was conducted under the condition No. 1 shown in Table 2. The test was conducted under the welding conditions of No. 2, and a tensile test piece and an impact test piece were collected and tested. The tensile strength was 490 N / mm 2 or more, and the absorbed energy was 70 J or more at 0 ° C. The survey results are summarized in Table 3.
表３中ワイヤＮｏ．１〜１０は本発明例、ワイヤＮｏ．１１〜２１は比較例である。本発明例であるワイヤＮｏ．１〜１０は、Ｔｉ酸化物のＴｉＯ２換算値、ＳｉＯ２、ＺｒＯ２、金属弗素化合物のＦ換算値、Ｃ、Ｓｉ、Ｍｎ、Ａｌ、Ｍｇ、Ｍｎ／ＳｉおよびＡｌ／Ｍｇも適正であるので、アーク状態が良好で、スパッタ発生量が少なく、スラグ剥離性およびビード形状が良好でピットの発生もなく、機械性能も良好であるなど極めて満足な結果であった。 In Table 3, wire No. 1 to 10 are examples of the present invention, wire Nos. 11 to 21 are comparative examples. Wire No. which is an example of the present invention. 1 to 10 are appropriate for TiO 2 equivalent value of Ti oxide, SiO 2 , ZrO 2 , F equivalent value of metal fluorine compound, C, Si, Mn, Al, Mg, Mn / Si and Al / Mg. The results were extremely satisfactory, such as good arc condition, small amount of spatter generation, good slag removability and bead shape, no pits, and good mechanical performance.
比較例中ワイヤＮｏ．１１は、Ｔｉ酸化物のＴｉＯ２換算値が多いのでビード形状が不良でピットも発生した。また、Ｍｎ／Ｓｉが低いので吸収エネルギーが低かった。
ワイヤＮｏ．１２は、Ｔｉ酸化物のＴｉＯ２換算値が少ないのでアークが不安定でスラグ剥離性およびビード形状が不良でスパッタ発生量も多かった。また、Ｓｉが少ないのでピットが生じ、溶着金属の引張強さおよび吸収エネルギーが低かった。
In the comparative example, the wire No. No. 11 had a large TiO 2 conversion value of Ti oxide, so the bead shape was poor and pits were generated. Moreover, since Mn / Si was low, the absorbed energy was low.
Wire No. In No. 12, since the TiO 2 conversion value of the Ti oxide was small, the arc was unstable, the slag peelability and the bead shape were poor, and the amount of spatter was large. Further, since there was little Si, pits were generated, and the tensile strength and absorbed energy of the deposited metal were low.
ワイヤＮｏ．１３は、ＳｉＯ２が多いのでスパッタ発生量が多く、ピットも生じた。また、Ａｌ／Ｍｇが高いので溶着金属の吸収エネルギーが低かった。 Wire No. No. 13 has a large amount of sputter due to a large amount of SiO 2 , and pits were also generated. Moreover, since Al / Mg was high, the absorbed energy of the weld metal was low.
ワイヤＮｏ．１４は、ＳｉＯ２が少ないのでスラグ剥離性およびビード形状が不良であった。また、Ｍｎが少ないのでピットが生じ、溶着金属の引張強さおよび吸収エネルギーが低かった。 Wire No. No. 14 had poor slag removability and bead shape because of low SiO 2 . Moreover, since Mn was small, pits were generated, and the tensile strength and absorbed energy of the deposited metal were low.
ワイヤＮｏ．１５は、ＺｒＯ２が多いのでスパッタ発生量が多くスラグ剥離性も不良であった。また、Ｃが少ないので溶着金属の引張強さおよび吸収エネルギーが低かった。 Wire No. No. 15 had a large amount of spatter due to a large amount of ZrO 2 , and the slag removability was poor. Further, since C is small, the tensile strength and absorbed energy of the deposited metal were low.
ワイヤＮｏ．１６は、ＺｒＯ２が少ないのでピットが生じた。また、Ａｌが高いのでスパッタ発生量が多く、溶着金属の引張強さが高く吸収エネルギーが低かった。 Wire No. No. 16 had pits because ZrO 2 was small. Moreover, since Al was high, the amount of spatter was large, the tensile strength of the deposited metal was high, and the absorbed energy was low.
ワイヤＮｏ．１７は、金属弗素化合物のＦ換算値が多いのでスパッタ発生量が多かった。また、Ｍｎが高いので溶着金属の引張強さが高く吸収エネルギーが低かった。 Wire No. No. 17 had a large amount of spatter generation because the F-converted value of the metal fluorine compound was large. Moreover, since Mn was high, the tensile strength of the deposited metal was high and the absorbed energy was low.
ワイヤＮｏ．１８は、金属弗素化合物のＦ換算値が少ないのでアークが不安定であった。また、Ａｌが少ないのでビード形状が不良でピットも生じた。 Wire No. In No. 18, the arc was unstable because the F-converted value of the metal fluorine compound was small. Further, since the Al content was small, the bead shape was poor and pits were generated.
ワイヤＮｏ．１９は、Ｃが高いのでスパッタ発生量が多く、溶着金属の引張強さが高く吸収エネルギーが低かった。また、Ａｌ／Ｍｇが低いのでビード形状も不良であった。 Wire No. No. 19 had a high amount of spatter due to high C, and the weld metal had high tensile strength and low absorbed energy. Moreover, since Al / Mg was low, the bead shape was also poor.
ワイヤＮｏ．２０は、Ｓｉが多いので溶着金属の引張強さが高く吸収エネルギーが低かった。また、Ｍｇが少ないのでビード形状が不良でピットも生じた。 Wire No. No. 20 had a high tensile strength of the weld metal and a low absorbed energy because of the large amount of Si. Moreover, since there was little Mg, the bead shape was bad and the pit was also produced.
ワイヤＮｏ．２１は、Ｍｇが多いのでスパッタ発生量が多かった。また、Ｍｎ／Ｓｉが高いのでビード形状が不良であった。 Wire No. No. 21 has a large amount of spatter due to a large amount of Mg. Moreover, since Mn / Si was high, the bead shape was poor.
Claims (1)
Ｔｉ酸化物のＴｉＯ２換算：２．０〜４．０％、
ＳｉＯ２：０．５〜１．５％、
ＺｒＯ２：０．１〜０．６％、
金属弗化物のＦ換算値：０．０２〜０．０８％、
Ｃ：０．０２〜０．０８％、
Ｓｉ：０．３〜０．７％、
Ｍｎ：１．５〜２．５％、
かつ、Ｍｎ／Ｓｉ：２．５〜６．０、
Ａｌ：０．１５〜０．５％、
Ｍｇ：０．１５〜０．５％、
かつ、Ａｌ／Ｍｇ：０．３〜３．０、
Ｎｉ：０．３〜０．７％、
Ｃｒ：０．４５〜０．８％、
Ｃｕ：０．３〜０．６％を含有し、残部はＦｅ、アーク安定剤および不可避不純物であることを特徴とする耐候性鋼用水平すみ肉ガスシールドアーク溶接用フラックス入りワイヤ。 In a flux cored wire for horizontal fillet gas shielded arc welding for weatherproof steel, which is made by filling the steel outer shell with flux, the mass relative to the total mass of the wire,
TiO 2 conversion of Ti oxide: 2.0 to 4.0%,
SiO 2: 0.5~1.5%,
ZrO 2 : 0.1 to 0.6%,
F converted value of metal fluoride: 0.02 to 0.08%,
C: 0.02 to 0.08%,
Si: 0.3-0.7%,
Mn: 1.5 to 2.5%
And Mn / Si: 2.5-6.0,
Al: 0.15 to 0.5%,
Mg: 0.15 to 0.5%,
And Al / Mg: 0.3-3.0,
Ni: 0.3-0.7%,
Cr: 0.45 to 0.8%,
A flux-cored wire for horizontal fillet gas shielded arc welding for weatherproof steel, characterized by containing Cu: 0.3-0.6%, the balance being Fe, an arc stabilizer and inevitable impurities.
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| JP5419492B2 (en) * | 2009-02-26 | 2014-02-19 | 日鐵住金溶接工業株式会社 | Flux-cored wire for gas shielded arc welding |
| JP5662086B2 (en) * | 2010-09-03 | 2015-01-28 | 日鐵住金溶接工業株式会社 | Flux-cored wire for Ar-CO2 mixed gas shielded arc welding |
| CN102825401A (en) * | 2011-06-14 | 2012-12-19 | 鞍钢股份有限公司 | Corrosion-resistant flux-cored wire for gas shielded welding |
| JP6085205B2 (en) * | 2013-03-25 | 2017-02-22 | 株式会社神戸製鋼所 | Flux-cored wire for gas shielded arc welding |
| CN103934594B (en) * | 2014-03-28 | 2017-06-20 | 洛阳双瑞特种合金材料有限公司 | A kind of chrome molybdenum heat resisting steel ultralow-hydrogen low bonded flux and preparation method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02205298A (en) * | 1989-02-01 | 1990-08-15 | Nippon Steel Corp | Flux cored wire for gas shielded arc welding of refractory steel |
| JPH0647191B2 (en) * | 1990-04-11 | 1994-06-22 | 新日本製鐵株式会社 | Flux-cored wire for gas shield arc welding |
| JP3730440B2 (en) * | 1999-04-23 | 2006-01-05 | 日鐵住金溶接工業株式会社 | Flux-cored wire for gas shielded arc welding |
| JP3793429B2 (en) * | 2001-07-12 | 2006-07-05 | 日鐵住金溶接工業株式会社 | Flux-cored wire for gas shielded arc welding |
| JP2003103399A (en) * | 2001-09-27 | 2003-04-08 | Nippon Steel & Sumikin Welding Co Ltd | Flux-filled wire for welding weather resistant steel |
| JP4259887B2 (en) * | 2003-01-31 | 2009-04-30 | 株式会社神戸製鋼所 | Flux-cored wire for gas shielded arc welding for corrosion resistant steel |
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2006
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170756A (en) * | 2013-04-12 | 2013-06-26 | 河北翼辰实业集团有限公司 | Self-protection flux-cored wire for downward welding and horizontal position welding |
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| JP2008114264A (en) | 2008-05-22 |
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