JP2716848B2 - Low hydrogen coated arc welding rod - Google Patents
Low hydrogen coated arc welding rodInfo
- Publication number
- JP2716848B2 JP2716848B2 JP18715890A JP18715890A JP2716848B2 JP 2716848 B2 JP2716848 B2 JP 2716848B2 JP 18715890 A JP18715890 A JP 18715890A JP 18715890 A JP18715890 A JP 18715890A JP 2716848 B2 JP2716848 B2 JP 2716848B2
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- welding
- welding rod
- arc welding
- arc
- resistance
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Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は低水素系被覆アーク溶接棒に関し、被覆剤を
改善することによって特にプライマ塗布鋼板におけるピ
ットの発生が皆無であり、また耐ブローホール性が良好
で優れた溶接作業性を発揮する低水素系被覆アーク溶接
棒に関するものである。Description: FIELD OF THE INVENTION The present invention relates to a low-hydrogen-based coated arc welding rod, in which no pits are generated particularly in a primer-coated steel sheet by improving a coating agent, and blow-hole resistance is improved. The present invention relates to a low-hydrogen-based coated arc welding rod having good weldability and excellent welding workability.
（従来の技術） 最近、船舶や橋梁、プラントなどの陸上構造物の大型
化にともなって、50キロ級高張力鋼材の使用が増加し、
またプライマ塗布鋼板が多量に使用されている。この種
の溶接には一般に低水素系被覆アーク溶接棒が使用され
ている。(Prior art) Recently, the use of high-strength steel of 50 kg class has increased with the enlargement of onshore structures such as ships, bridges, and plants.
Also, a large amount of primer-coated steel sheet is used. Generally, a low hydrogen-based coated arc welding rod is used for this type of welding.
従来、この種の溶接棒のうち、CaCO3とCaF2を主成分
とする溶接棒においては溶接性が良好であるにもかかわ
らず、反面スラグのかぶり、フラグのはくり性が悪く、
ビード形状も凸型となり、溶接作業性が劣る欠点を有し
ている。一方MgCO3-SiO2-MgOを主成分とした溶接棒は、
作業性における欠点は相当除かれているが、未だ完全と
はいえない。例えば、プライマ塗布鋼板を溶接すると、
特にすみ肉溶接部にピットの発生がさけられないなどの
欠点がある。Conventionally, of this type of welding rod, the welding rod mainly composed of CaCO 3 and CaF 2 has good weldability, but on the other hand, fogging of slag, poor peeling of the flag,
The bead shape is also convex, and has the disadvantage of poor welding workability. On the other hand, the welding rod mainly composed of MgCO 3 -SiO 2 -MgO
The drawbacks in workability have been largely eliminated, but are not yet complete. For example, when welding a primer coated steel sheet,
In particular, there is a disadvantage that pit formation cannot be avoided in the fillet welded portion.
そこでこのような欠点を除くためにCaCO3,SiO2,TiO2,
鉄粉を主成分として配合することによって前記のような
溶接作業性を改善した溶接棒が、特公昭49-20467号公報
によって開示されている。Therefore, in order to eliminate such disadvantages, CaCO 3 , SiO 2 , TiO 2 ,
Japanese Patent Publication No. 49-20467 discloses a welding rod in which the welding workability is improved by blending iron powder as a main component.
しかし本発明者等の知見では、溶接作業性はかなり改
善されるが十分とは云い難く、特にプライマ塗布鋼板に
対する耐ピット性、耐ブローホール性が劣る。However, according to the knowledge of the present inventors, the welding workability is considerably improved but is not sufficient, and particularly, the pit resistance and the blowhole resistance against the primer-coated steel sheet are poor.
また特開昭50-56339号公報では、TiO2,CaCO3,SiO2を
主成分とする被覆剤を用いて溶接ヒュームの発生量を低
減することを開示しているが、本発明者の実験によれ
ば、なる程溶接ヒュームの発生量が従来のCaCO3-CaF2系
被覆アーク溶接棒に比べて、低減される効果は認められ
るが、本質的な溶接作業性の向上とプライマ塗布鋼板に
対する耐ピット性は、本発明者らが目標とする域に達し
ていない。Japanese Patent Application Laid-Open No. 50-56339 discloses that the amount of welding fumes generated is reduced by using a coating agent containing TiO 2 , CaCO 3 , and SiO 2 as main components. According to, the amount of generated welding fume is reduced compared to the conventional CaCO 3 -CaF 2 coated arc welding rod, but the effect is reduced, but the essential improvement in welding workability and the The pit resistance has not reached the range targeted by the present inventors.
（発明が解決しようとする課題） 本発明は溶接作業性を良好にするとともに、プライマ
塗布鋼板に対するピットの発生が皆無であり、またブロ
ーホールの発生を防止し、溶接後の補修作業をなくす、
低水素系被覆アーク溶接棒を提供することを目的とす
る。(Problems to be Solved by the Invention) The present invention improves the welding workability, eliminates the occurrence of pits in the primer-coated steel sheet, prevents the occurrence of blowholes, and eliminates repair work after welding.
An object of the present invention is to provide a low hydrogen-based coated arc welding rod.
（課題を解決するための手段） 本発明は前述した要望に応えるために種々被覆剤成分
を検討し、プライマ塗布鋼板に対する溶接作業性を良好
で、耐ピット、耐ブローホール性が向上したものであっ
て、その要旨とするところは、マイカ又はタルクの少な
くとも１種を４〜10％、リチール35〜62％、炭酸石灰９
〜30％、蛍石１〜８％、Fe-Mn3〜18％、珪砂１〜15％、
有機物0.1〜２％を含み、残部が水ガラスから成る被覆
剤を鋼心線に被覆したことを特徴とする低水素系被覆ア
ーク溶接棒である。(Means for Solving the Problems) In order to meet the above-mentioned demands, the present invention examines various coating components and has improved welding workability to a primer-coated steel sheet and improved pit resistance and blow hole resistance. The point is that at least one of mica or talc is 4 to 10%, lithium is 35 to 62%, carbonated lime 9
~ 30%, fluorite 1-8%, Fe-Mn3 ~ 18%, silica sand 1 ~ 15%,
A low hydrogen coated arc welding rod comprising a steel core wire coated with a coating agent containing 0.1 to 2% of an organic substance and a balance of water glass.
また本発明は、マイカ又はタルクの少なくとも１種を
４〜10重量％（以下％で表わす）、ルチール35〜63％、
炭酸石灰９〜30％、螢石１〜18％、Fe-Mn3〜18％、珪砂
１〜15％、および有機物0.1〜２％に、更に鉄粉35％以
下を含み、残部が水ガラスから成る被覆剤を鋼心線に被
覆したことを特徴とする低水素系被覆アーク溶接棒であ
る。Further, the present invention provides a method for preparing at least one kind of mica or talc by 4 to 10% by weight (hereinafter expressed by%), 35 to 63% of rutile,
Carbonaceous lime 9-30%, fluorite 1-18%, Fe-Mn 3-18%, silica sand 1-15%, and organic matter 0.1-2%, further containing iron powder 35% or less, the balance consisting of water glass This is a low-hydrogen coated arc welding rod characterized in that a coating agent is coated on a steel core wire.
（作用） 前述のような状況に鑑み本発明者等は低水素系被覆ア
ーク溶接棒の溶接作業性および耐ピット性の向上につい
て被覆剤の面から鋭意研究を進めてきた。(Operation) In view of the above-described situation, the present inventors have intensively studied the improvement of welding workability and pit resistance of a low hydrogen-based coated arc welding rod from the aspect of a coating agent.
その結果、これ等の課題を解決する手段として、ルチ
ール、炭酸石灰、蛍石を主成分とする被覆剤配合に含水
鉱物であるマイカ又はタルクの少なくとも１種を添加す
ることにより、溶滴移行がスプレー状となることによ
り、溶接作業性が改善され、プライマ塗布鋼板に対する
耐ピット性も大幅に向上するという新規知見を得て、本
発明を成したものである。As a result, as a means for solving these problems, droplet transfer is achieved by adding at least one of mica or talc, which is a hydrous mineral, to a coating composition mainly composed of rutile, carbonated lime, and fluorite. The present invention has been accomplished based on a new finding that the spraying improves the welding workability and greatly improves the pit resistance to the primer-coated steel sheet.
以下に本発明における構成要件を説明する。 Hereinafter, the constituent requirements in the present invention will be described.
マイカ、タルクは結晶水を含む鉱物であり、溶接金属
の水素源として加えられるもので、４％未満では水素不
足のためプライマ塗布鋼板ではピット、ブローホールが
発生するほか、溶接始業性における溶滴がドロップ移行
で、アンダーカットを生じやすくする。Mica and talc are minerals containing water of crystallization and are added as a hydrogen source in the weld metal. If the content is less than 4%, pits and blowholes will occur in the primer coated steel sheet due to insufficient hydrogen, and droplets in welding startability will be generated. Facilitates undercut due to drop transition.
一方10％を超えると溶接作業性は良好であるが、溶接
金属の水素量が過剰となり、耐割れ性が劣化する。つま
りJIS Z 3212 D 5016「低水素系被覆アーク溶接棒」の
規格においては、拡散性水素量は15ml/100g以下である
ことが必要であることから上限10％とした。On the other hand, if it exceeds 10%, the welding workability is good, but the amount of hydrogen in the weld metal becomes excessive and the crack resistance deteriorates. That is, in the standard of JIS Z 3212 D 5016 "Low hydrogen coated arc welding rod", the upper limit is set to 10% because the amount of diffusible hydrogen needs to be 15 ml / 100 g or less.
ルチールはスラグ生成剤、粘性調整剤およびアーク安
定剤として使用される。35％未満ではアーク状態が不安
定で、また再アーク性が悪くなる。Rutile is used as a slag forming agent, viscosity modifier and arc stabilizer. If it is less than 35%, the arc state will be unstable and the re-arc property will be poor.
一方62％を超えるとスラグの流動性が増大し、溶接中
に溶接棒端にスラグがからみつきビード形状を損ねる。
さらに被覆剤の耐熱性が劣化し、溶接時の溶接棒後半部
は棒焼け現象を起し、ブローホール、アンダーカットな
どの溶接欠陥が生じやすくなる。On the other hand, if it exceeds 62%, the fluidity of the slag increases, and the slag sticks to the end of the welding rod during welding, impairing the bead shape.
Further, the heat resistance of the coating material is deteriorated, and the latter half of the welding rod during welding causes a stick burning phenomenon, and welding defects such as blowholes and undercuts are likely to occur.
炭酸石灰はスラグの粘性を調整し、またガス発生剤と
して作用する。９％未満ではガス発生剤としての効果が
不充分で、ピット、ブローホールが発生し易くなる。Carbonated lime adjusts the viscosity of the slag and acts as a gas generating agent. If it is less than 9%, the effect as a gas generating agent is insufficient, and pits and blow holes are easily generated.
一方30％を超えるとアークが弱くなり、棒焼け現象が
見られるとともに、スラグの被包性が劣化して水平すみ
肉におけるビード形状が凸状となる。On the other hand, if it exceeds 30%, the arc becomes weak, a stick burning phenomenon is observed, and the encapsulating property of the slag is deteriorated, and the bead shape in the horizontal fillet becomes convex.
蛍石はスラグ生成剤および粘性調整剤として使用され
る。１％未満ではピット、ブローホールが発生し易い。
一方８％を超えるとアーク状態が不安定となるとともに
スラグはくり性が劣化する。Fluorite is used as a slag former and a viscosity modifier. If it is less than 1%, pits and blow holes are likely to occur.
On the other hand, if it exceeds 8%, the arc state becomes unstable, and the slag is degraded.
Fe-Mnは脱酸剤および合金剤としての効果がある。３
％未満では脱酸不足となりピット、ブローホールが発生
する。また溶接金属の機械的性質が劣化するほか、アー
クの強さ、アークの広がりが損なわれてビード形状が悪
くなる。Fe-Mn has an effect as a deoxidizing agent and an alloying agent. 3
%, Deoxidation becomes insufficient and pits and blowholes are generated. In addition, the mechanical properties of the weld metal are deteriorated, and the strength of the arc and the spread of the arc are impaired, resulting in a poor bead shape.
一方18％を超えると脱酸過剰となってピットが発生す
るとともに溶接金属が硬化し、耐割れが劣化する。On the other hand, if it exceeds 18%, deoxidation will be excessive, pits will be generated, and the weld metal will be hardened and crack resistance will deteriorate.
珪砂はスラグ生成剤として使用される。１％未満では
十分なスラグの粘性が得られず、下向溶接におけるスラ
グの被包性が劣化し、ビード形状が凸状となる。Silica sand is used as a slag forming agent. If it is less than 1%, sufficient viscosity of the slag cannot be obtained, the slag encapsulation property in downward welding is deteriorated, and the bead shape becomes convex.
一方15％を超えるとスラグの粘性が著しく増大し、ピ
ットが発生し易くなったり、被覆筒が深くなりすぎてア
ーク状態が不安定となる。On the other hand, if it exceeds 15%, the viscosity of the slag increases remarkably, pits are easily generated, and the coating state becomes too deep to make the arc state unstable.
有機物として木粉、デキストリン等を塗装助剤として
使用するものであるが、0.1％未満では添加効果を期待
できず、２％を超えて添加すると被覆の固着性が劣化す
るので好ましくない。Wood flour, dextrin and the like are used as a coating aid as an organic substance. However, if it is less than 0.1%, the effect of addition cannot be expected, and if it exceeds 2%, the fixation of the coating is undesirably deteriorated.
鉄粉は高溶着速度で溶接能率を計るためや、良好な再
アーク性を得るために必要に応じて適宜添加するもので
ある。添加する場合は35％以下とするが、35％を超える
と溶着速度や再アーク性は維持されるものの、スラグ量
が不足し、またスラグの被包性が損なわれてビード形状
が悪くなる。Iron powder is added as needed to measure the welding efficiency at a high welding speed or to obtain good re-arcability. If it is added, the content is 35% or less. If it exceeds 35%, the welding speed and the re-arc property are maintained, but the amount of slag is insufficient, and the encapsulating property of the slag is impaired, resulting in a poor bead shape.
（実施例） 第１表に示す各種組成の被覆剤に水ガラスを添加して
湿式混合を行なった後、C 0.07％、Si 0.02％、Mn 0.49
％、P 0.012％、S 0.008％、N 0.0015％から成る直径4m
m×400mm長の炭素鋼心線（JIS Z 3523）に通常の押出し
式塗装機により被覆外径が6.4mmになるように塗装し
て、最高温度400℃で乾燥を行ない、被覆アーク溶接棒
を作製して、各溶接棒について、プライマ塗布鋼板に対
する溶接作業性試験、耐ピット試験、耐ブローホール試
験および耐割れ性試験を行なった。(Examples) Water glass was added to coating materials of various compositions shown in Table 1 and wet-mixed, and then C 0.07%, Si 0.02%, Mn 0.49
%, P 0.012%, S 0.008%, N 0.0015% Diameter 4m
A carbon steel core wire (JIS Z 3523) of mx 400 mm length is coated with a normal extrusion type coating machine so that the coating outer diameter becomes 6.4 mm, and dried at a maximum temperature of 400 ° C. The prepared welding rods were subjected to a welding workability test, a pit resistance test, a blow hole resistance test, and a crack resistance resistance test for a primer-coated steel sheet.
溶接作業性試験、耐ピット試験、耐ブローホール試験
および耐割れ性試験は下記の方法で試験を行なった。A welding workability test, a pit resistance test, a blow hole resistance test, and a crack resistance resistance test were conducted by the following methods.
［溶接作業性試験］ 板厚12.7mmのSM-50B鋼をＴ型に組立て立向上進溶接
（電流150A）および水平すみ肉溶接（電流170A）を行な
った。[Welding workability test] SM-50B steel having a thickness of 12.7 mm was assembled into a T-shape, and vertical welding (current 150A) and horizontal fillet welding (current 170A) were performed.
評価基準は従来のCaCO3-CaF2を主成分とする低水素系
被覆アーク溶接棒に比べ、溶滴移行状態、アークの安定
性、スラグはくり性などの溶接作業性が良好なものを○
印、あまりかわらないものを×印とした。The evaluation criteria are those that have better welding workability such as droplet transfer state, arc stability, slag removal, etc. compared to the conventional low hydrogen coated arc welding rod mainly composed of CaCO 3 -CaF 2.
Marks, those that did not change very much were marked X.
［耐ピット、耐ブローホール試験］ SM-50B鋼に膜厚が約30μｍになるようにウォッシュプ
ライマを塗布し、Ｔ型に組立てて、手で水平すみ肉溶接
を行なった。[Pit resistance and blow hole resistance test] A wash primer was applied to SM-50B steel so as to have a film thickness of about 30 µm, assembled into a T-shape, and horizontal fillet welding was performed by hand.
耐ブローホール性についてはNK鋼船規則Ｍ編により評
価し、10％以下のものを○印良好、10％以下のものを×
印とした。Blow hole resistance was evaluated according to the NK Steel Ship Regulations, Part M.
Marked.
耐ピット性についてはビード全長に渡ってまったく発
生しなかったものを○印良好、１個以上発生したものを
×印とした。Regarding the pit resistance, those that did not occur at all over the entire length of the bead were evaluated as ○, and those that generated one or more beads were evaluated as X.
［耐割れ性試験］ 板厚25mmのSM-50B鋼を用いて、JIS Z 3157のＵ型溶接
割れ試験により評価した。従来のCaCO3-CaF2を主成分と
する低水素系被覆アーク溶接棒と耐割れ性が同等のもの
を○印良好、劣るものを×印とした。これらの結果を第
１表に示す。なお○印は良好、×印は不良を示す。[Crack resistance test] Using a 25 mm-thick SM-50B steel, evaluation was made by a U-type weld crack test according to JIS Z 3157. The ones having the same cracking resistance as those of the conventional low-hydrogen-based coated arc welding rod containing CaCO 3 -CaF 2 as the main component were marked with “○”, and those with poor cracking were marked with “X”. Table 1 shows the results. In addition, ○ indicates good, and × indicates bad.
［拡散性水素量試験］ JIS Z 3118において、拡散性水素量試験をガスクロ法
にて実施した。[Diffusible hydrogen amount test] In JIS Z 3118, a diffusible hydrogen amount test was performed by a gas chromatography method.
第１表においてB-8〜B-23は比較例、B-1〜B-7は本発
明の実施例である。In Table 1, B-8 to B-23 are Comparative Examples, and B-1 to B-7 are Examples of the present invention.
この試験の結果、以下に示す如く考察される。 As a result of this test, the following is considered.
B-1〜B-7は本発明の要件を満たす低水素系被覆アーク
溶接棒を用いた場合で、全判定項目とも良好である。B-1 to B-7 are cases in which a low hydrogen-based coated arc welding rod satisfying the requirements of the present invention is used, and all the judgment items are good.
B-8はマイカが少なく、ピットを発生すると共に溶接
作業性がドロップ移行して、アンダーカットを生じ、ビ
ード形状も悪くなった。B-8 had few mica, pits were generated, and welding workability shifted to drop, resulting in undercut and poor bead shape.
B-9はタルクが多く、拡散性水素量が増加した。また
耐割れ性も劣った。B-10はマイカとタルクが少なく、ピ
ットを発生すると共にアークが荒くなり、アンダーカッ
トを生じ、また耐ブローホール性も劣化した。B-9 was rich in talc and the amount of diffusible hydrogen increased. Also, crack resistance was poor. B-10 had less mica and talc, generated pits, roughened arcs, undercuts, and deteriorated blowhole resistance.
B-11はマイカとタルクが多く、溶接作業性は良好であ
るが、拡散性水素量が増加した。また耐割れ性も劣っ
た。B-11 contains a lot of mica and talc, and welding workability is good, but the amount of diffusible hydrogen increased. Also, crack resistance was poor.
B-12はルチールが少なく、スラグ量が不足し、アーク
不安定で、ビード形状が悪くなった。B-12 was low in rutile, lacked slag, was unstable in arc, and had bad bead shape.
B-13はルチールが多く、スラグの流動性が増大しす
ぎ、ビード形状を悪くし、棒焼けによる耐ブローホール
やアンダーカットが生じた。B-13 was rich in rutile, the fluidity of the slag was too high, the bead shape was bad, and blowhole resistance and undercut due to bar burning occurred.
B-14は炭酸石灰が少なく、ガス発生剤の効果が不十分
でピットやブローホールが発生した。B-14 had less carbonated lime, and the effect of the gas generating agent was insufficient, causing pits and blowholes.
B-15は炭酸石灰が多く、アートがあらくなりスパッタ
の発生が多く、アンダーカットが生じ、ビード形状が悪
くなった。B-15 had a lot of carbonated lime, the art was rough, spatter was generated frequently, undercut occurred, and the bead shape became bad.
B-16は蛍石が少なく、ピットやブローホールが発生し
た。B-16 had less fluorite, and had pits and blowholes.
B-17は蛍石が多く、溶接作業性が悪く、特にアーク状
態が不安定となり、スラグはくりが劣化した。B-17 had a large amount of fluorite, and the welding workability was poor. In particular, the arc condition became unstable, and the slag was degraded.
B-18はFe-Mnが少なく、脱酸不足によるピットやブロ
ーホールが発生すると共にアークの強さおよび広がりが
損なわれてビード形状が悪くなった。In B-18, Fe-Mn was low, and pits and blowholes were generated due to insufficient deoxidation, and the strength and spread of the arc were impaired, resulting in poor bead shape.
B-19はFe-Mnが多く、脱酸過剰となってピットが発生
すると共に溶接金属が硬化し、耐割れが劣化する。B-19 contains a lot of Fe-Mn, which causes excessive deoxidation to generate pits, harden the weld metal, and degrade cracking resistance.
B-20は珪砂が少なく、スラグ量および粘性が不足し、
ビード形状が悪くなる。B-20 has less silica sand, slag amount and viscosity are insufficient,
The bead shape becomes worse.
B-21は珪砂が多く、スラグの粘性が著しく増し、ピッ
トが発生し、被覆筒が深くなりアーク状態が不安定で、
ビード形状が悪くなる。B-21 has a lot of silica sand, the viscosity of slag increases remarkably, pits are generated, the coating cylinder becomes deep and the arc state is unstable,
The bead shape becomes worse.
B-22は有機物が多く、アークの吹付けが強く、アーク
不安定となり、またスパッタも多く発生し、ビード形状
も悪くなった。B-22 had a lot of organic matter, strong arc spraying, arc instability, spatter was also generated, and the bead shape was bad.
B-23は鉄粉が多く、スラグ量が不足し、ビード形状が
悪い。B-23 has a lot of iron powder, lacks the amount of slag, and has a bad bead shape.
（発明の効果） 本発明は被覆剤を構成する配合成分の種類を特定する
と共に、各成分の配合割合を特定範囲に設定することに
より、ピットの発生が皆無で耐ブローホール性、耐割れ
性および溶接作業性の良好な低水素系被覆アーク溶接棒
を提供するものである。(Effects of the Invention) The present invention specifies the types of the components constituting the coating agent and sets the compounding ratio of each component in a specific range. Another object of the present invention is to provide a low hydrogen coated arc welding rod having good welding workability.
かくして、本発明の溶接棒を用いることによって、プ
ライマ塗装鋼板での優れた溶接作業性、耐ピット、耐ブ
ローホール性、耐割れ性が得られることになったのであ
り、高張力鋼材等を用いた溶接建造分野に寄与するとこ
ろは極めて大である。Thus, by using the welding rod of the present invention, excellent welding workability, pit resistance, blow hole resistance, and crack resistance in primer-coated steel sheets can be obtained. It greatly contributes to the welding construction field.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 長野 功 神奈川県相模原市淵野辺５―10―１ 新 日本製鐵株式会社第二技術研究所内 (56)参考文献 特開 昭50−7743（ＪＰ，Ａ) 特開 昭59−4997（ＪＰ，Ａ) 特開 昭57−199592（ＪＰ，Ａ) 特開 昭57−154397（ＪＰ，Ａ) 特開 昭57−149095（ＪＰ，Ａ) 特公 昭45−31748（ＪＰ，Ｂ１) 特公 昭42−11228（ＪＰ，Ｂ１) 特公 昭52−26501（ＪＰ，Ｂ２) 特公 昭62−40120（ＪＰ，Ｂ２) 特公 昭60−45993（ＪＰ，Ｂ２) 特公 昭56−42399（ＪＰ，Ｂ２) ──────────────────────────────────────────────────続 き Continuing from the front page (72) Isao Nagano, Inventor 5-10-1 Fuchinobe, Sagamihara City, Kanagawa Prefecture Nippon Steel Corporation 2nd Technical Research Institute (56) References JP-A-50-7743 (JP, A JP-A-59-4997 (JP, A) JP-A-57-199592 (JP, A) JP-A-57-154397 (JP, A) JP-A-57-149095 (JP, A) 31748 (JP, B1) JP-B 42-11228 (JP, B1) JP-B 52-26501 (JP, B2) JP-B 62-40120 (JP, B2) JP-B 60-45,993 (JP, B2) JP-B-56-42399 (JP, B2)
Claims (2)
10重量％（以下％で表わす）、ルチール35〜62％、炭酸
石灰９〜30％、螢石１〜８％、Fe-Mn3〜18％、珪砂１〜
15％、および有機物0.1〜２％を含み、残部が水ガラス
から成る被覆剤を鋼心線に被覆したことを特徴とする低
水素系被覆アーク溶接棒。1. The method according to claim 1, wherein at least one kind of mica or talc is used
10% by weight (hereinafter expressed in%), rutile 35 to 62%, carbonated lime 9 to 30%, fluorite 1 to 8%, Fe-Mn 3 to 18%, silica sand 1 to 1
A low hydrogen coated arc welding rod comprising a steel core wire coated with a coating agent containing 15% and an organic substance of 0.1 to 2%, the balance being water glass.
10重量％（以下％で表わす）、ルチール35〜62％、炭酸
石灰９〜30％、螢石１〜８％、Fe-Mn3〜18％、珪砂１〜
15％、および有機物0.1〜２％に、更に鉄粉35％以下を
含み、残部が水ガラスから成る被覆剤を鋼心線に被覆し
たことを特徴とする低水素系被覆アーク溶接棒。2. The method according to claim 1, wherein at least one of mica and talc is used
10% by weight (hereinafter expressed in%), rutile 35 to 62%, carbonated lime 9 to 30%, fluorite 1 to 8%, Fe-Mn 3 to 18%, silica sand 1 to 1
A low-hydrogen coated arc welding rod comprising a steel core wire coated with a coating material containing 15%, organic matter 0.1 to 2%, iron powder 35% or less, and a balance of water glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18715890A JP2716848B2 (en) | 1990-07-17 | 1990-07-17 | Low hydrogen coated arc welding rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18715890A JP2716848B2 (en) | 1990-07-17 | 1990-07-17 | Low hydrogen coated arc welding rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0475796A JPH0475796A (en) | 1992-03-10 |
| JP2716848B2 true JP2716848B2 (en) | 1998-02-18 |
Family
ID=16201145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18715890A Expired - Lifetime JP2716848B2 (en) | 1990-07-17 | 1990-07-17 | Low hydrogen coated arc welding rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2716848B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4014896B2 (en) * | 2001-05-25 | 2007-11-28 | 株式会社トクヤマ | Method for producing flocculant for water treatment |
| US7666916B2 (en) | 2003-07-25 | 2010-02-23 | Keiichiro Asaoka | Flocculant, manufacturing method therefor, and flocculation method using the flocculant |
| CN111200098B (en) * | 2020-01-08 | 2022-08-19 | 深圳市力电电池有限公司 | Button battery pin and welding method thereof |
-
1990
- 1990-07-17 JP JP18715890A patent/JP2716848B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0475796A (en) | 1992-03-10 |
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