JPS5913954B2 - Covered arc welding rod - Google Patents

Covered arc welding rod

Info

Publication number
JPS5913954B2
JPS5913954B2 JP4383780A JP4383780A JPS5913954B2 JP S5913954 B2 JPS5913954 B2 JP S5913954B2 JP 4383780 A JP4383780 A JP 4383780A JP 4383780 A JP4383780 A JP 4383780A JP S5913954 B2 JPS5913954 B2 JP S5913954B2
Authority
JP
Japan
Prior art keywords
welding
titania
vertical downward
slag
welding rod
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.)
Expired
Application number
JP4383780A
Other languages
Japanese (ja)
Other versions
JPS56141995A (en
Inventor
治 田中
実 石井
哲哉 橋本
則行 原
精二郎 三浦
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP4383780A priority Critical patent/JPS5913954B2/en
Publication of JPS56141995A publication Critical patent/JPS56141995A/en
Publication of JPS5913954B2 publication Critical patent/JPS5913954B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Nonmetallic Welding Materials (AREA)

Description

【発明の詳細な説明】 本発明は、チタニア系溶接棒の特性を維持しつつ、その
欠点とされている継続性能特に耐割れ性を改善した被覆
アーク溶接棒に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coated arc welding rod that maintains the characteristics of titania-based welding rods and improves its continuous performance, particularly its cracking resistance, which has been considered a drawback.

チタニア系の被覆アーク溶接棒は、1スパッターが少な
い、2再アーク性が優れている、3ビード外観が美麗で
ある、4立向下進溶接が可能で溶接能率力塙い、等多く
の利点を有している。ところが継手性能特に耐割れ性が
劣るという欠点がある為、その適用対象は薄板の溶接に
限定されていた。しかしチタニア系溶接棒の上記特徴に
鑑みれ5 ば、その耐割れ性を改善し厚板に対しても適
用可能にすることは極めて有意義なことである。本発明
は前述の様な状況のもとで、チタニア系溶接棒の具備す
る利点を維持しつつ溶接金属の耐割れ性を改善すべく、
特に被覆剤の成分組成の面10から鋭意研究の結果完成
されたものであつて、その構成とは、TiO2:35〜
57%、SiO2:15〜28%、Al2O3:3〜8
%、Mn:2.5〜9%、MgCO3及び/若しくはC
aC03:3〜10%、有機物:1〜8%、ZrO2:
0.3〜6%15を夫々含有し、且つ(TiO2+ Z
rO2)/(CaC03+MgC03)で与えられる重
量比が5〜18の範囲内である被覆剤を、軟鋼心線外周
に塗布してなるところに要旨が存在する。以下本発明に
おける数値範囲設定の根拠を述ベク0 る。
Titania-based coated arc welding rods have many advantages, such as 1) less spatter, 2) excellent re-arcing properties, 3) beautiful bead appearance, and 4) ability to perform vertical downward welding, increasing welding efficiency. have. However, its application was limited to welding thin plates because it had the disadvantage of poor joint performance, particularly cracking resistance. However, in view of the above-mentioned characteristics of titania-based welding rods, it would be extremely meaningful to improve their cracking resistance and make them applicable to thick plates. Under the above-mentioned circumstances, the present invention aims to improve the cracking resistance of weld metal while maintaining the advantages of titania-based welding rods.
In particular, it was completed as a result of intensive research from the aspect of the component composition of the coating material, and its composition is TiO2: 35 ~
57%, SiO2: 15-28%, Al2O3: 3-8
%, Mn: 2.5-9%, MgCO3 and/or C
aC03: 3-10%, organic matter: 1-8%, ZrO2:
0.3 to 6%15, and (TiO2+ Z
The gist is that a coating material having a weight ratio given by rO2)/(CaC03+MgC03) within a range of 5 to 18 is applied to the outer periphery of a mild steel core wire. The basis for setting the numerical range in the present invention will be described below.

1TiO2:35〜57% スラグ被包性、スラグ流動性等を調整し、チタニア系溶
接棒の特長である良好な再アーク性とビード外観を確保
する為に不可欠の成分であ25り、35%未満ではこれ
らの特徴が有意に発揮されない。
1TiO2: 35-57% This is an essential component for adjusting slag encapsulation, slag fluidity, etc. and ensuring good re-arc properties and bead appearance, which are the characteristics of titania-based welding rods. Below these characteristics, these characteristics will not be exhibited significantly.

しかし多すぎるとスラグ剥離性が劣化し、作業能率が低
下するので、57%以下に止めるべきである。2510
2: 15〜28% 30スラグの粘性やアークの吹き付け強さ等を調整する
機能があり、15%未満ではアーク吹き付けが弱い為に
スラグの巻き込みが起こり易く、。
However, if it is too large, the slag removability deteriorates and work efficiency decreases, so it should be kept at 57% or less. 2510
2: 15-28% 30 It has a function to adjust the slag viscosity and arc blowing strength, etc. If it is less than 15%, the arc blowing is weak and slag is likely to get caught.

一方28%を越えるとアーク電圧力塙くなつてアアンダ
ーカツトが発生する。353Al2O3:3〜8% スラグの粘性を調整しビード外観を整えると共に、スプ
レーアークの形成を助長する。
On the other hand, if it exceeds 28%, the arc voltage becomes too strong and an undercut occurs. 353Al2O3: 3-8% Adjusts the viscosity of the slag, improves the appearance of the bead, and promotes the formation of spray arcs.

3%−nハー 未満ではこれらの効果が不十分で、8%を越えるとアー
クの吹き付けが粗くなりスパツタ一が増加する。
If it is less than 3%-n, these effects are insufficient, and if it exceeds 8%, the arc spray becomes coarse and spatter increases.

4Mn:2.5〜9% 金属Mn或はFe−MnlSi−Mnの形態で配合され
、脱酸剤としての機能を発揮する。
4Mn: 2.5 to 9% It is blended in the form of metal Mn or Fe-MnlSi-Mn and functions as a deoxidizing agent.

2.5%未満では脱酸不足によつてブローホールが発生
し易く、溶接金属のX線性能が劣化する。
If it is less than 2.5%, blowholes tend to occur due to insufficient deoxidation, and the X-ray performance of the weld metal deteriorates.

一方9(X)を越えると脱酸過剰によつてピツトの多発
を招く。5cac03及び/又はMgCO3:3〜10
%ガス発生剤として作用し溶接金属を大気から保護する
為の成分であり、3%未満ではシールド不足によりピツ
トが発生し、一方10(fl)を越えるとアークが不安
定になつてアーク切れが多発し、アンダーカツト等が生
じ易くなる。
On the other hand, if it exceeds 9(X), excessive deoxidation causes frequent pitting. 5cac03 and/or MgCO3: 3-10
% This is a component that acts as a gas generating agent and protects the weld metal from the atmosphere. If it is less than 3%, pitting will occur due to insufficient shielding, while if it exceeds 10 (fl), the arc will become unstable and arc breakage will occur. This occurs frequently, and undercuts are more likely to occur.

6有機物:1〜8% ガス発生剤であると共に再アーク性を向上する機能があ
り、10I)未満ではこれらの効果が有意に発揮されな
い。
6 Organic matter: 1 to 8% It functions as a gas generating agent and improves re-arc properties, and these effects are not significantly exhibited if the content is less than 10I).

また8%を越えるとアークの吹き付けが過大になつてア
ンダーカツトやスパツタ一の多発を招くという欠陥が生
じる。7Zr02:0.3〜6% ZrO2は高融点化合物であり、溶接時の保護筒を強化
し、チタニア系溶接棒の特長である立向下進溶接の特性
を生かす為に不可欠の成分である。
Moreover, if it exceeds 8%, the arc spray becomes excessive, resulting in defects such as frequent occurrence of undercuts and spatters. 7Zr02: 0.3-6% ZrO2 is a high melting point compound and is an essential component for strengthening the protective tube during welding and making use of the characteristics of vertical downward welding, which is a feature of titania-based welding rods.

即ちチタニア系溶接棒を用いた立向下進溶接では、コン
タクト溶接を行なうか否かによつてビード形状は相当異
なる。そしてコンタクト溶接を行なえない場合は、第1
図aに示す如くビードが凹状になり、設計強度を満足す
る為には多層盛溶接が必要になつて溶接能率が低下し、
立向下進溶接の利点が減殺される。これに対しコンタク
ト溶接を行なうと、第1図bに示す如く一層溶接で良好
なビードが得られるから、立向下進溶接の利点が有効に
発揮される。即ちコンタクト溶接を可能にすることは、
立向下進溶接の特長を生かす上で不可欠の要件であるが
、その為には適度の保護筒強度が要求される。かかる観
点から保護筒強化成分を種々検索した結果、ZrO2に
想到したものである。そしてZrO2の保護筒強化作用
を有意に発揮させる為には少なくとも0.3%以上の配
合が必要であり、一方6%を越えると、保護筒強化効果
は高ま・るもののスラグ流動性が増加し、スラグの巻き
込みによる欠陥が生じる。上記1〜7の被覆剤原料は、
水ガラス等の粘結剤と共に混練して心線外周に塗布され
る。
That is, in vertical downward welding using a titania-based welding rod, the bead shape varies considerably depending on whether contact welding is performed or not. If contact welding is not possible, the first
As shown in Figure a, the bead becomes concave and multi-layer welding is required to satisfy the design strength, reducing welding efficiency.
The advantages of vertical downward welding are diminished. On the other hand, when contact welding is performed, a better bead can be obtained by welding as shown in FIG. 1b, so that the advantages of vertical downward welding can be effectively exhibited. In other words, enabling contact welding is
This is an essential requirement to take advantage of the advantages of vertical downward welding, and for this purpose a suitable protective tube strength is required. From this point of view, we searched for various components to strengthen the protective tube, and as a result, we came up with ZrO2. In order to significantly exert the effect of reinforcing the protective cylinder of ZrO2, it is necessary to contain at least 0.3%. On the other hand, if it exceeds 6%, although the effect of strengthening the protective cylinder increases, the fluidity of the slag increases. However, defects occur due to slag entrainment. The coating material raw materials 1 to 7 above are:
It is kneaded with a binder such as water glass and applied to the outer periphery of the core wire.

周保護筒の強度に影響する他の因子についても検討を加
えたところ、被覆径/心線径で示される比(以下被覆径
比という)を1.35〜1.65の範囲に設定すること
により、一段と適正な保護筒強度が得られることを知つ
た。しかして被覆径比が1.35未満では、保護筒が薄
くなつて強度が不十分になり、溶接中で溶接棒が短絡を
起こし易くなる。一方1.65を越えるとアーク電圧が
高くなつて溶接入熱が増加し、母材の溶け落ちを生じた
り或はスラグ量が増加する為スラグの巻き込みを起こす
ので好ましくない。ちなみに第2図は、被覆剤中のZr
O2量と被覆径比が保護筒の強度に及ぼす影響を調べた
結果(実験条件は下記の通り)を示すグラフで、ZrO
2量が0.3〜6(Fbで且つ被覆径比が1.35〜1
.65の範囲になる様に調整すれば、適正な保護筒強度
を確実に得ることができる。
After considering other factors that affect the strength of the circumferential protection tube, we found that the ratio expressed by coating diameter/core wire diameter (hereinafter referred to as coating diameter ratio) was set in the range of 1.35 to 1.65. I learned that even more appropriate protection tube strength can be obtained by doing this. However, if the covering diameter ratio is less than 1.35, the protective tube becomes thin and its strength becomes insufficient, and the welding rod is likely to cause a short circuit during welding. On the other hand, if it exceeds 1.65, the arc voltage becomes high and the welding heat input increases, causing burn-through of the base metal or increasing the amount of slag, which is not preferable. By the way, Figure 2 shows the Zr content in the coating material.
This is a graph showing the results of investigating the influence of O2 amount and coating diameter ratio on the strength of the protective tube (experimental conditions are as below).
2 amount is 0.3 to 6 (Fb and coating diameter ratio is 1.35 to 1
.. By adjusting it within the range of 65, it is possible to reliably obtain an appropriate protection cylinder strength.

〔実験条件〕[Experimental conditions]

供試棒:4mmφ 溶接継手:板厚3.2m7x0T継手 溶接電流:165A 溶接法:立向下進コンタクト溶接 周第2図中の○、△、×は下記の意味を示す。 Test rod: 4mmφ Welded joint: plate thickness 3.2m 7x0T joint Welding current: 165A Welding method: Vertical downward contact welding Circles ○, △, and × in Figure 2 have the following meanings.

○:保護筒強く、溶接欠陥なし△:保護筒強いが溶接欠
陥(スラグ巻き込み、母材の溶け落ち)あり×:保護筒
弱く、短絡により溶接不能 8(TlO2+ZrO2)/(CaCO3+MgCO3
):5〜18この比率はチタニア系溶接棒の特長である
立向下進溶接作業性を確保すると共に、溶接金属の耐割
れ性等を高めるのに不可欠の要件である。
○: Protective tube is strong, no welding defects △: Protective tube is strong, but there are welding defects (slag entrainment, base metal burn-through)
): 5 to 18 This ratio is an essential requirement to ensure vertical downward welding workability, which is a feature of titania-based welding rods, and to improve the cracking resistance of weld metal.

TlO2、ZrO2、CacO3、MgCO3の個々の
機能については先に説明した通りであるが、更に本発明
者等は(TlO2+ZrO2)/(CaCO3+MgC
O3)の比率が溶接金属の耐割れ性及び残棒長に及ぼす
影響を調べたところ、第3図の結果を得た。但し残棒長
とは、各供試棒を用いて立向下進溶接を行ない、スラグ
巻き込みで溶接不能になつた時点における未使用部分の
長さを意味し、スラグ巻き込みを早く生じたもの程残棒
長が長くなるので、溶接棒の性能及び溶接作業性の1つ
の評価基準と考えることができる。また耐割れ性はJI
S−Z−3155「C形ジグ拘束突合せ溶接割れ試験法
」により測定した。この結果、耐割れ性についてみると
、(TiO2+ZrO2)/(CaCO3+MgCO3
)の値が小さい方が良好となる傾向が見られる。しかし
この比率が小さくなりすぎるとスラグの粘性が低下し、
溶接中にスラグの巻き込みが起こる結果、溶接を中断せ
ざるを得なくなり、残棒長が長くなつて不経済であると
共にチタニア系溶接棒の利点が生かせない。一方、(T
iO2+ZrO2)/(CaCO3+MgCO3)の比
が5〜18の範囲となる様に各成分の配合量を設定した
ものでは、上記各項目を満足させることができる。本発
明は概略以上の様に構成されるが、要は配合成分の種類
及び配合率を夫々特定範囲に設定すると共に、(TlO
2+ZrO2)/(CaCO3+MgCO3)の重量比
率を特定範囲に設定した被覆剤を使用することにより、
チタニア系溶接棒の特長である立向下進溶接作業性を維
持しつつ、溶接金属の耐割れ性を大幅に改善し得ること
になつた。その結果、耐割れ性の点で薄板材の溶接にし
か適用できなかつたチタニア系溶接棒が、厚板材の立向
下進溶接にも適用できる様になり、チタニア系被覆アー
ク溶接棒の適用分野を拡大し得ることになつた。次に実
験例を示す。
The individual functions of TlO2, ZrO2, CacO3, and MgCO3 are as explained above, but the inventors further discovered that (TlO2+ZrO2)/(CaCO3+MgC
When the influence of the ratio of O3) on the cracking resistance and remaining bar length of weld metal was investigated, the results shown in Figure 3 were obtained. However, the remaining rod length refers to the length of the unused portion when vertical downward welding is performed using each test rod and welding becomes impossible due to slag entrainment. Since the remaining rod length becomes longer, it can be considered as one evaluation criterion for the performance of the welding rod and welding workability. In addition, the cracking resistance is JI
Measured by S-Z-3155 "C-shaped jig restraint butt weld cracking test method". As a result, regarding the cracking resistance, (TiO2+ZrO2)/(CaCO3+MgCO3
) tends to be better when the value is smaller. However, if this ratio becomes too small, the viscosity of the slag will decrease,
As a result of the entrainment of slag during welding, welding has to be interrupted and the length of the remaining rod becomes longer, which is uneconomical and the advantages of titania-based welding rods cannot be utilized. On the other hand, (T
The above-mentioned items can be satisfied by setting the blending amount of each component so that the ratio of iO2+ZrO2)/(CaCO3+MgCO3) is in the range of 5 to 18. The present invention is roughly constructed as described above, but the key point is that the types and blending ratios of the ingredients are set within specific ranges, and (TlO
By using a coating material with a weight ratio of 2+ZrO2)/(CaCO3+MgCO3) set within a specific range,
While maintaining vertical downward welding workability, which is a feature of titania-based welding rods, it has been possible to significantly improve the cracking resistance of the weld metal. As a result, titania-based welding rods, which were previously only applicable to welding thin plates due to their crack resistance, can now be applied to vertical downward welding of thick plates. It has now become possible to expand the Next, an experimental example will be shown.

実験例 1 第1表に示す成分組成の被覆剤を4mmφ×400Um
1の軟鋼心線表面に対し、乾燥後の被覆径が6mmφ(
被覆径比−1.50)となる様に塗布してチタニア系被
覆アーク溶接棒を得た。
Experimental example 1 A coating material with the composition shown in Table 1 was applied to a 4mmφ×400Um
The coating diameter after drying is 6 mmφ (
A titania-based coated arc welding rod was obtained by applying the coating so that the coating diameter ratio was -1.50.

得られた各溶接棒を使用し、立向下進溶接によつて溶接
作業性を観察すると共に、溶接が不可能になつた時点で
の残棒長を測定した。また割れ試験はJIS−Z−31
55「C型ジグ拘束突合せ溶接割れ試験法」に準じて行
なつた。結果を第1表に一括して示す。第1表より次の
様に考察することができる。
Using each of the obtained welding rods, welding workability was observed by vertical downward welding, and the remaining rod length at the time when welding became impossible was measured. In addition, the cracking test is JIS-Z-31.
The test was carried out in accordance with 55 "C-type jig restraint butt weld cracking test method". The results are summarized in Table 1. From Table 1, it can be considered as follows.

(1)供試棒A−1,2,3は従来のチタニア系被覆ア
ーク溶接棒の一例を示したもので、個々の被覆剤成分の
含有率は好適範囲内にあるが、(TlO2+ZrO2)
/(CaCO3+MgCO3)が本発明の範囲外である
為、A−1,2では耐割れ性が劣悪であり、またA−3
では残棒長が長く立向下進溶接作業性が極めて悪い。(
2) C−1〜7は何れも比較例で、(TlO2+Zr
O2)/(CaCO3+MgCO3)の値が適正範囲内
にある為、残棒長が短かく溶接金属の耐割れ性も良好で
あるが、被覆剤成分のうち1又は2種以上の含有率が本
発明で定めた範囲に入らない為、立向下進溶接作業性が
悪く、チタニア系溶接棒の特長を発揮できない。
(1) Test rods A-1, 2, and 3 are examples of conventional titania-based coated arc welding rods, and although the content of each coating component is within the preferred range, (TlO2 + ZrO2)
/(CaCO3+MgCO3) is outside the scope of the present invention, so A-1 and 2 have poor cracking resistance, and A-3
In this case, the remaining rod length is long and the workability of vertical downward welding is extremely poor. (
2) C-1 to C-7 are all comparative examples, and (TlO2+Zr
Since the value of O2)/(CaCO3+MgCO3) is within the appropriate range, the remaining rod length is short and the weld metal has good cracking resistance, but the content of one or more of the coating components is Since it does not fall within the range specified by , vertical downward welding workability is poor and the features of titania-based welding rods cannot be demonstrated.

(3) B−1〜8は何れも本発明の要件を充足する実
施例で、残棒長が短く立向下進溶接作業性も良好であり
、また得られる溶接金属の耐割れ性も優れている。
(3) B-1 to B-8 are all examples that satisfy the requirements of the present invention, and the remaining bar length is short and vertical downward welding workability is good, and the resulting weld metal has excellent cracking resistance. ing.

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

第1図A,bは、立向下進溶接においてコンタクト溶接
採用の有・無によるビード形状の違いを対比して示す略
図、第2図は、ZrO2の含有率及び被覆径比と溶接棒
の保護筒強度の関係を示すグラフ、第3図は、(TiO
2+ZrO2)/(CaCO3+MgCO3)比と残棒
長及び割れ率の関係を示すグラフである。
Figures 1A and b are schematic diagrams comparing the differences in bead shape with and without contact welding in vertical downward welding, and Figure 2 shows the ZrO2 content and coating diameter ratio and the welding rod. The graph shown in Figure 3 showing the relationship between the strength of the protective cylinder is (TiO
2+ZrO2)/(CaCO3+MgCO3) ratio, remaining bar length, and cracking rate.

Claims (1)

【特許請求の範囲】[Claims] 1 TiO_2:35〜57%、SiO_2:15〜2
8%、Al_2O_3:3〜8%、Mn:2.5〜9%
、MgCO_3及び/若しくはCaCO_3:3〜10
%、有機物:1〜8%、ZrO_2:0.3〜6%を夫
々含有し、且つ(TiO_2+ZrO_2)/(CaC
O_3+MgCO_3)で与えられる重量比が5〜18
の範囲内である被覆剤を軟鋼心線外周に塗布したもので
あることを特徴とする被覆アーク溶接棒。
1 TiO_2: 35-57%, SiO_2: 15-2
8%, Al_2O_3: 3-8%, Mn: 2.5-9%
, MgCO_3 and/or CaCO_3: 3-10
%, organic matter: 1-8%, ZrO_2: 0.3-6%, and (TiO_2+ZrO_2)/(CaC
The weight ratio given by O_3 + MgCO_3) is 5 to 18
1. A coated arc welding rod, characterized in that a coating agent falling within the range of 100 to 100% is applied to the outer periphery of a mild steel core wire.
JP4383780A 1980-04-02 1980-04-02 Covered arc welding rod Expired JPS5913954B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4383780A JPS5913954B2 (en) 1980-04-02 1980-04-02 Covered arc welding rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4383780A JPS5913954B2 (en) 1980-04-02 1980-04-02 Covered arc welding rod

Publications (2)

Publication Number Publication Date
JPS56141995A JPS56141995A (en) 1981-11-05
JPS5913954B2 true JPS5913954B2 (en) 1984-04-02

Family

ID=12674853

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4383780A Expired JPS5913954B2 (en) 1980-04-02 1980-04-02 Covered arc welding rod

Country Status (1)

Country Link
JP (1) JPS5913954B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100436488B1 (en) * 2002-03-13 2004-06-22 고려용접봉 주식회사 Covered arc welding electrodes
JP6845094B2 (en) * 2017-06-14 2021-03-17 日鉄溶接工業株式会社 High titanium oxide shielded metal arc welding rod

Also Published As

Publication number Publication date
JPS56141995A (en) 1981-11-05

Similar Documents

Publication Publication Date Title
KR20030021397A (en) Basic flux cored wire
JP5367312B2 (en) High cellulosic coated arc welding rod
KR100355581B1 (en) Flux cored wire for gas shield arc welding
JPS5913954B2 (en) Covered arc welding rod
JP3150476B2 (en) Ni-base alloy flux cored wire
JP2670848B2 (en) Composite wire for gas shielded arc welding
JP6669680B2 (en) Lime titania coated arc welding rod
JP2711069B2 (en) Low hydrogen coated arc welding rod
JPH0521677B2 (en)
JP2010194571A (en) Flux-cored wire for two-electrode horizontal fillet gas shield arc welding
JP2716848B2 (en) Low hydrogen coated arc welding rod
JP6987800B2 (en) Illuminite-based shielded metal arc welding rod
JPS6030597A (en) Coated electrode
KR100494008B1 (en) Metal cored wire for CO2 gas shielded arc welding
KR900001676B1 (en) Flux cored electrodes for self-shielded arc welding
JPH02263596A (en) Coated electrode
JPH01233092A (en) Coated electrode
JPH03142099A (en) Coated arc welding rod for stainless steel
US4086389A (en) Coating composition comprising crystalline cellulose and a coated electrode for arc welding produced therewith
JPH0632870B2 (en) High cellulose coated arc welding rod
JPH04313492A (en) Low hydrogen type coated electrode
JPH08276292A (en) Non-low hydrogen type coated electrode
JPH04313493A (en) Low hydrogen type coated electrode
JP2000042787A (en) Flux cored wire for gas shield arc welding
JP2002346791A (en) Coated arc welding electrode

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees