JP2674843B2 - Coated arc welding rod for cast iron - Google Patents
Coated arc welding rod for cast ironInfo
- Publication number
- JP2674843B2 JP2674843B2 JP1284590A JP28459089A JP2674843B2 JP 2674843 B2 JP2674843 B2 JP 2674843B2 JP 1284590 A JP1284590 A JP 1284590A JP 28459089 A JP28459089 A JP 28459089A JP 2674843 B2 JP2674843 B2 JP 2674843B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- welding rod
- slag
- cast iron
- arc
- 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 - Lifetime
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- Nonmetallic Welding Materials (AREA)
Description
【発明の詳細な説明】 「産業上の利用分野」 本発明は、鋳鉄用の被覆アーク溶接棒に関し、特にア
ーク安定性、ビードの広がりが良く、スラグ巻込み、ブ
ローホールなど溶接欠陥が発生しない鋳鉄用被覆アーク
溶接棒に関するものである。TECHNICAL FIELD The present invention relates to a coated arc welding rod for cast iron, particularly good arc stability, good bead spread, and no welding defects such as slag entrainment and blowholes. The present invention relates to a covered arc welding rod for cast iron.
「従来の技術」 従来より鋳鉄の溶接では、溶接金属組成が純ニッケル
系、および50％ニッケル系からなる溶接棒が一般的に使
用される。その理由としてニッケルは、炭素の固溶度が
低く炭素が析出し易いことから、溶接の際に鋳鉄母材か
ら希釈を受けた溶接金属は、炭素による硬化も少なく、
又オーステナイト組織となることから延性に優れるな
ど、他の溶接材料に比べ鋳鉄の溶接に適していること、
50％ニッケル系組成では、他の合金組成と比較して線膨
張係数が鋳鉄母材に近く、耐割れ性の面からも優れた点
がある。"Prior Art" Conventionally, in welding of cast iron, a welding rod having a weld metal composition of pure nickel type and 50% nickel type is generally used. The reason for this is that nickel has a low solid solubility of carbon and carbon is likely to precipitate, so the weld metal diluted from the cast iron base material during welding is less hardened by carbon,
In addition, it is suitable for welding cast iron compared to other welding materials, since it has an austenite structure and has excellent ductility.
The 50% nickel-based composition has a coefficient of linear expansion close to that of the cast iron base material as compared with other alloy compositions, and is superior in terms of crack resistance.
溶接作業性の面から見ると鋳鉄用被覆アーク溶接棒
は、母材希釈を低く抑える必要から溶接入熱を極力低く
抑える溶接が一般的である。そこで他の溶接材料に見ら
れる被覆組成では、アーク電圧が高く母材への溶け込み
が大きくなり、熱影響部の白銑化が増長され割れの原因
となるなど鋳鉄用溶接棒として適当でない。鋳鉄用溶接
棒の被覆剤としては、アーク電圧を低くすることが出来
る黒鉛を多量に含有した被覆剤を適用し、上記問題の解
決を図っている。この先行技術としては、例えば特公昭
38−26078号、特開昭58−23594号公報があるが、黒鉛を
多量に含有した被覆剤は、アークの安定性及び集中性に
劣り、スラグ巻込み、ブローホールなどの溶接欠陥が発
生し易く、安定した溶接が出来ないことから十分な継手
性能が得られないなど鋳鉄溶接の問題解決は、十分とは
言えない。From the viewpoint of welding workability, a covered arc welding rod for cast iron is generally welded with the welding heat input kept as low as possible because it is necessary to keep the base metal dilution low. Therefore, the coating composition found in other welding materials is unsuitable as a welding rod for cast iron because the arc voltage is high, the penetration into the base metal is large, the white pig iron in the heat-affected zone is promoted, and cracking occurs. As a coating material for a welding rod for cast iron, a coating material containing a large amount of graphite capable of lowering an arc voltage is applied to solve the above problem. As this prior art, for example, Japanese Patent Publication Sho
Although there are 38-26078 and JP-A-58-23594, a coating material containing a large amount of graphite is inferior in arc stability and concentration, and causes welding defects such as slag entrainment and blowholes. It is not enough to solve the problems of cast iron welding, such as the fact that sufficient joint performance cannot be obtained because it is easy and stable welding cannot be performed.
「発明が解決しようとする課題」 本発明は、鋳鉄用被覆アーク溶接棒を用いた溶接にお
いてアークの安定性、集中性に優れ、スラグ巻込み、ブ
ローホールなどの溶接欠陥が発生せず、健全な継手性能
が得られる鋳鉄用被覆アーク溶接棒を提供することにあ
る。"Problems to be solved by the invention" The present invention is excellent in arc stability and concentration in welding using a coated arc welding rod for cast iron, does not cause welding defects such as slag entrainment and blowholes, and is sound. It is an object of the present invention to provide a coated arc welding rod for cast iron that can obtain excellent joint performance.
「課題を解決するための手段」 本発明の要旨は、重量比で40％以上のNiを含有し、残
部が実質Feからなる心線の外周に炭酸塩;30〜60％、金
属フッ化物;1〜10％、硅酸塩;1〜15％、有機物１〜10
％、粒度が１〜32ミクロンが85％以上で、かつ１〜12ミ
クロンが50％以上から構成される微粒黒鉛が８〜20％含
有する被覆剤を溶接棒全量に対して10〜30％塗布した
後、100〜280℃の温度で乾燥したことを特徴とした鋳鉄
用被覆アーク溶接棒にある。"Means for Solving the Problems" The gist of the present invention is to contain a carbonate in the outer periphery of a core wire containing 40% or more by weight of Ni and the balance being substantially Fe; 30 to 60%, a metal fluoride; 1-10%, silicate; 1-15%, organic matter 1-10
%, The particle size of 1 to 32 microns is 85% or more, and the particle size of 1 to 12 microns is 8% to 20% of fine particle graphite. After that, the coated arc welding rod for cast iron is characterized by being dried at a temperature of 100 to 280 ° C.
「作用」 以下本発明を詳細に説明する。"Operation" The present invention will be described in detail below.
まず心線としては、純NiおよびNi−Fe合金を使用する
が、これは前述の鋳鉄用溶接棒として、Niの特徴を確保
するための40％以上のNiを含有する心線を使用する必要
がある。心線としては、純Niおよび55％ニッケル残部Fe
からなる心線が一般的である。First, as the core wire, pure Ni and Ni-Fe alloys are used, but it is necessary to use a core wire containing 40% or more Ni for securing the characteristics of Ni as the above-mentioned welding rod for cast iron. There is. As the core wire, pure Ni and 55% nickel balance Fe
The core wire consisting of is common.
次に被覆剤を限定した理由について述べる。 Next, the reason why the coating material is limited will be described.
まず、炭酸塩は、溶接中にCO2ガスを発生し、溶融プ
ールを大気から遮断すると同時に、スラグの一部とな
る。又アーク安定性の改善にも効果が大きい。しかし、
炭酸塩が30％未満では、CO2ガス発生量が十分でなく大
気の遮断が十分行えないことから、スパッタの発生、ア
ークが不安定になるなどその効果は十分でない。又60％
超では、CO2ガス発生量が過多になり、スパッタが多く
なると同時にスラグ発生量も過多となり、溶接棒先端に
スラグが回り込みアーク切れの原因となることから炭酸
塩を30〜60％の範囲に規定した。尚、ここで言う炭酸塩
とは、炭酸石灰、炭酸バリウム、炭酸マグネシウム、炭
酸リチウムおよび炭酸ストロンチウムなどを言い効果は
変わらなかった。First, carbonates generate CO 2 gas during welding, which shuts off the molten pool from the atmosphere and at the same time becomes part of the slag. It is also very effective in improving arc stability. But,
If the amount of carbonate is less than 30%, the amount of CO 2 gas generated is not sufficient and the atmosphere cannot be shielded sufficiently, so that the effects such as generation of spatter and unstable arc are not sufficient. Again 60%
If it exceeds the above range, the amount of CO 2 gas generated will be excessive, the amount of spatter will increase, and the amount of slag will also increase at the same time, and slag will wrap around the tip of the welding rod, causing arc breakage. Stipulated. The term "carbonate" as used herein means lime carbonate, barium carbonate, magnesium carbonate, lithium carbonate, strontium carbonate, etc. and the effect was not changed.
金属フッ化物については、スラグの流動性を高め、ビ
ード形状の改善に効果は大きい。しかし１％未満では、
その効果が発揮されず10％超えでは、スラグ量が過多と
なりアーク切れの原因となる。又、スラグ流動性が低く
なり過ぎることから、安定したビードが得られないな
ど、金属フッ化物を１〜10％の範囲に規定した。尚ここ
で言う金属フッ化物とは、フッ化カルシウム、フッ化ソ
ーダ、フッ化カリおよびフッ化マグネシウムなどを言
う。The metal fluoride has a great effect on enhancing the fluidity of the slag and improving the bead shape. But below 1%,
If the effect is not exhibited and exceeds 10%, the amount of slag becomes excessive and causes arc breakage. Further, since the slag fluidity becomes too low, a stable bead cannot be obtained, and the metal fluoride is defined in the range of 1 to 10%. The metal fluoride referred to here means calcium fluoride, sodium fluoride, potassium fluoride, magnesium fluoride and the like.
硅酸塩については、アークの安定性およびスラグ流動
性の改善に効果が大きい。しかし１％未満では、その効
果は十分に発揮されない。15％超えでは、スラグの流動
性が悪くなり、ビードが凸になるなど鋳鉄用溶接棒の溶
接作業性としては適さない。又、スパッタの発生量が多
くなりスラグ剥離性も劣化することから、硅酸塩を１〜
15％の範囲に規定した。尚硅酸塩を含む材料としてカリ
長石、マイカ、けい砂および水ガラスから添加すること
が出来る。Silicate has a great effect on improving arc stability and slag fluidity. However, if it is less than 1%, the effect is not sufficiently exhibited. If it exceeds 15%, the fluidity of the slag becomes poor and the bead becomes convex, which is not suitable for the welding workability of the welding rod for cast iron. In addition, since the amount of spatter generated increases and the slag removability also deteriorates, it
Specified within a range of 15%. In addition, potassium feldspar, mica, silica sand and water glass can be added as a material containing silicate.
有機物については、アーク力の強化および被覆固着性
の改善に効果が大きい。又鋳鉄用溶接棒特有の黒鉛を多
量に含む被覆系では、被覆の保護筒を強化する効果もあ
る。しかし１％未満では、その効果は発揮されない。又
10％超えでは、被覆の保護筒が長くなりアーク安定性が
悪くなることから有機物を１〜10％の範囲に規定した。
尚ここで言う有機物とは、小麦澱粉、デキストリン、コ
ーンスターチおよびセルロースなどを言う。With respect to organic substances, they are highly effective in strengthening the arc force and improving the coating adherence. Further, a coating system containing a large amount of graphite peculiar to the welding rod for cast iron also has the effect of strengthening the protective cylinder of the coating. However, if it is less than 1%, the effect is not exhibited. or
When it exceeds 10%, the protective cylinder of the coating becomes long and the arc stability deteriorates. Therefore, the organic matter was defined in the range of 1 to 10%.
The organic substances mentioned here include wheat starch, dextrin, corn starch and cellulose.
黒鉛については、通常鋳鉄用溶接棒に用いる黒鉛は、
結晶質の天然産、非晶質の人造黒鉛に大別される。その
天然産の黒鉛には、黒鉛粒子の形状が鱗片状を呈した鱗
状黒鉛、又塊状を呈した土状黒鉛とに区別される。これ
らの黒鉛粒度は、いずれも44〜270ミクロン程度の粒度
構成をもったものが一般的であり、これらの黒鉛を適宜
調合、配合され使用される。しかしこの黒鉛を使用する
ことにより、保護筒の劣化、溶融不均一によるアーク切
れ、又溶滴移行も粗くなるなど鋳鉄用溶接棒特有の溶接
作業性を呈し、ビード形状も凸ビードとなり、溶接欠陥
（スラグ巻込み）の発生原因となるなど根本的な解決は
難しい。その解決として鋳鉄用溶接棒には、必須の成分
である黒鉛の形状および粒度に着目し、本発明をなし得
たものである。即ち黒鉛粒度が１〜32ミクロンが85％以
上で、かつ１〜12ミクロンが50％以上からなる粒度構成
を有する黒鉛を使用することで、ソフトなアーク状態を
示し、保護筒も強化され安定した溶接が可能となった。
その効果により母材希釈も低減されると同時に、スラグ
被包性、ビード形状も改善され、溶接欠陥（スラグ巻込
み）の発生も大幅に軽減された。しかし、微粒黒鉛が８
％未満では、十分の成分設計が出来ない。又20％超えで
は、アークが極端に弱くなりビードの広がりに欠け凸ビ
ードになるなど問題解決にならないので、黒鉛について
は、１〜32ミクロンが85％以上で、かつ１〜12ミクロン
が50％以上から構成される微粒黒鉛を被覆剤全量に対し
て８〜20％の範囲と規定した。Regarding graphite, graphite used for welding rods for cast iron is usually
It is roughly classified into crystalline natural products and amorphous artificial graphite. The naturally occurring graphite is classified into scaly graphite in which the shape of graphite particles is flake-like, and earth-like graphite in the form of lump. These graphite particles generally have a particle size composition of about 44 to 270 microns, and these graphites are appropriately blended and blended for use. However, by using this graphite, the welding workability peculiar to the welding rod for cast iron is exhibited, such as deterioration of the protective cylinder, arc breakage due to uneven melting, and rough transfer of droplets, and the bead shape also becomes a convex bead, resulting in welding defects. It is difficult to fundamentally solve such problems as (slag inclusion). As a solution to this problem, the present invention has been accomplished by paying attention to the shape and particle size of graphite, which is an essential component of a welding rod for cast iron. That is, by using graphite having a particle size composition of graphite particle size of 1 to 32 micron is 85% or more and 1 to 12 micron is 50% or more, a soft arc state is exhibited and the protective cylinder is strengthened and stabilized. Welding has become possible.
As a result, the dilution of the base metal was reduced, the slag encapsulation and bead shape were also improved, and the occurrence of welding defects (slag inclusion) was greatly reduced. However, if the fine graphite is 8
If it is less than%, a sufficient composition cannot be designed. On the other hand, if it exceeds 20%, the arc becomes extremely weak and the beads do not spread and become a convex bead, so it does not solve the problem. For graphite, 1-32 micron is 85% or more, and 1-12 micron is 50%. The fine graphite composed of the above is specified in the range of 8 to 20% with respect to the total amount of the coating agent.
次に本発明の鋳鉄用溶接棒は、上記被覆剤組成を必須
とするが、この他必要に応じてSi,Mn,Ni,Fe,Ti,Al,Mgの
合金、脱酸剤又、Al2O3,MgO,K2O,Na2O,TiO2などの酸化
物を少量添加することが出来る。Next, the welding rod for cast iron of the present invention requires the above coating composition, but if necessary, Si, Mn, Ni, Fe, Ti, Al, Mg alloys, deoxidizers, or Al 2 A small amount of oxides such as O 3 , MgO, K 2 O, Na 2 O and TiO 2 can be added.
被覆剤を10〜30％心線の外周に塗布する理由について
述べる。The reason for applying the coating agent to the outer circumference of the 10 to 30% core wire will be described.
被覆剤塗布量は、溶接棒を設計する上では、合金成分
の調整および溶接作業性特にスラグ量の調整を加味し決
定される。しかし10％未満では、スラグ量が不足しビー
ド表面に均一に被包しないばかりかシールド不足による
ブローホールの発生が認められた。30％超えでは、スラ
グ量が過多になりアーク直下に溶接スラグが回り込みア
ーク切れおよびスラグ巻込みが発生したので溶接棒全重
量に対して被覆剤塗布量は、10〜30％の範囲に規定し
た。The coating amount of the coating agent is determined in consideration of adjustment of alloy components and welding workability, particularly adjustment of slag amount, in designing the welding rod. However, if it is less than 10%, not only the slag amount is insufficient and the bead surface is not uniformly covered, but also blowholes are observed due to insufficient shield. If it exceeds 30%, the amount of slag becomes excessive and the welding slag wraps around immediately below the arc, causing arc breakage and slag inclusion. Therefore, the coating agent application amount was specified within the range of 10 to 30% with respect to the total weight of the welding rod. .
溶接棒の乾燥温度を規定した理由は、100℃未満の乾
燥では、保護筒が均一に溶融できずビードの乱れおよび
残留水分によるピットの発生が認められた。また280℃
超えでは、アーク力が弱くなり安定した溶接が出来ない
ばかりか、ビードの広がりに欠けスラグ巻込みの発生も
認められたことから溶接棒の乾燥温度を100〜280℃の範
囲に規定した。The reason for defining the drying temperature of the welding rod is that the drying was less than 100 ° C, the protective cylinder could not be melted uniformly, and the bead was disturbed and pits were generated due to residual moisture. 280 ℃
Above the limit, the arc force was weakened and stable welding was not possible, and the occurrence of slag entrainment due to the lack of bead spread was also observed. Therefore, the drying temperature of the welding rod was specified in the range of 100 to 280 ° C.
以上、述べたように本発明による鋳鉄用溶接棒、母材
への希釈を低く抑えると共に、ビード形状特にビードの
広がりが良くスラグ巻込み、ブローホールなどの発生も
なく安定した溶接が可能となり、鋳鉄の溶接における信
頼性、品質構造が期待される。以下実施例により本発明
の効果を更に具体的に説明する。As described above, the welding rod for cast iron according to the present invention as described above, while suppressing the dilution to the base material to a low level, the bead shape particularly the spread of the bead is well slag inclusion, and stable welding is possible without the occurrence of blow holes, The reliability and quality structure of cast iron welding are expected. The effects of the present invention will be described more specifically with reference to the following examples.
「実 施 例」 以下本発明の実施例を示す。[Examples] Examples of the present invention will be shown below.
第１表に使用した心線を示す。心線Ａは純Ni心線、Ｂ
は純Ni心線の外周に軟鋼フープを巻き所定の寸法に伸線
したものを使用した。Table 1 shows the core wires used. Core A is pure Ni core, B
Is a pure Ni core wire with a mild steel hoop wound around it and drawn to a predetermined size.
第２表に製造した溶接棒を示す。溶接棒寸法は全て3.
2×350mmとした。また黒鉛については第３表に示す。第
４表に試験結果を示す。溶接作業性は、ビードオンプレ
ートによるアーク安定性、スラグ被包性、剥離性および
ビード形状を目視で観察した。実用上問題にならない物
には○、実用上問題となるものは×印評価とした。尚溶
接電流は全て交流90Aとした。Table 2 shows the produced welding rod. All welding rod dimensions are 3.
It was 2 × 350 mm. The graphite is shown in Table 3. Table 4 shows the test results. Regarding the welding workability, the arc stability by the bead on plate, the slag encapsulation property, the peeling property, and the bead shape were visually observed. Those that did not pose a problem in practical use were evaluated as ◯, and those that pose a problem in practical use were evaluated as x. All welding currents were 90A AC.
本発明で示した棒記号Ｃ−１〜Ｃ−８の溶液棒は、い
ずれもアークはソフトで安定し、鋳物溶接棒のいままで
の欠点であったスラグ流動性および保護筒の脆弱性など
が大幅に改善された。その結果ビード形状が安定し、ス
ラグ巻き込みも発生もない良好な溶接が可能となった。 In the solution rods having the bar symbols C-1 to C-8 shown in the present invention, the arc is soft and stable, and the slag fluidity and the fragility of the protective cylinder, which have been the drawbacks of cast welding rods, have been considered. Greatly improved. As a result, the bead shape was stable, and good welding was possible without slag inclusion.
一方比較例に示した溶接棒Ｃ−９およびＣ−10は、溶
接棒乾燥温度がいずれも60,80℃と低く保護筒が均一に
溶融できずビード形状が不安定になったり、ピット発生
などの溶接欠陥が認められた。On the other hand, the welding rods C-9 and C-10 shown in the comparative examples have low welding rod drying temperatures of 60 and 80 ° C., the protective cylinder cannot be melted uniformly, the bead shape becomes unstable, and pits are generated. Welding defects were observed.
溶接棒Ｃ−11は、被覆率が８％と低いためスラグ量が
やや不足気味となりスラグが均一に被包せずシールド不
足となりブローホールが発生した。又、溶接棒の乾燥温
度が300℃と高いのでアークの吹き付けが弱くなりドー
ビの広がりに欠けスラグ巻き込みなどの発生が認められ
た。Since the coverage of welding rod C-11 was as low as 8%, the amount of slag tended to be slightly insufficient, the slag was not uniformly covered, and the shield was insufficient, causing blowholes. Also, since the welding rod drying temperature was as high as 300 ° C, the arc spraying became weak and the spread of the dobby was lacked, and the occurrence of slag entrainment was observed.
溶接棒Ｃ−12は、被覆率が32％と高くスラグ量過多と
なりアーク直下に回り込み安定したアークが得られずビ
ード形状も好ましいものでなかった。又、有機物が多く
硅酸塩が少ないことから保護筒が弱く溶接中に被覆が欠
け落ち安定した溶接が出来なかった。The welding rod C-12 had a high coverage rate of 32% and an excessive amount of slag, so that the welding rod C-12 circulated directly below the arc and a stable arc was not obtained, and the bead shape was not preferable. Further, since the organic cylinder is large and the amount of silicate is small, the protective cylinder is weak and the coating falls off during welding, making stable welding impossible.
溶接棒Ｃ−13は、炭酸塩が少ないことからアークが不
安定になりスパッタが多く発生した。又、硅酸塩が多い
ため、スラグの流動性が悪くなりビードが凸ビードにな
るなどスラグ巻き込みの恐れがあると同時に黒鉛が本発
明外の中粒、粗粒黒鉛を使用したためアークは荒くスラ
グが球状となりビード表面に均一に被包しないなど満足
すべきものでなかった。Since the welding rod C-13 had a small amount of carbonate, the arc became unstable and a lot of spatter was generated. Also, since there are many silicates, there is a risk of slag entrainment such as the fluidity of the slag becoming poor and the beads becoming convex beads, and at the same time the graphite is a medium-sized and coarse-grained graphite outside the present invention, the arc is rough and the slag is rough. Became spherical and was not uniformly encapsulated on the bead surface, which was not satisfactory.
溶接棒Ｃ−14は、炭酸塩が多いことからスラグ量が過
多となりアーク直下にスラグが回り込みアークが不安定
となりスパッタの発生が多くなった。又、溶接棒乾燥温
度が高いことかアークの吹き付けが弱くなると同時に黒
鉛粒度も本発明外の中粒、粗粒の黒鉛を使用したためア
ークが荒くスラグも球状になり均一に被包しないなど、
スラグ量が多いことと相まって安定した溶接が出来なか
った。Since the welding rod C-14 contained a large amount of carbonate, the amount of slag was excessive and the slag circulated directly under the arc, and the arc became unstable, resulting in more spatter. In addition, since the welding rod drying temperature is high or the arc spraying becomes weaker, the graphite particle size is also outside the present invention medium grain size, because coarse grain graphite is used, the arc is rough and the slag is spherical and is not uniformly encapsulated.
Stable welding was not possible due to the large amount of slag.
溶接棒Ｃ−15は、フッ化物が多くスラグ流動性が低く
なりすぎると同時に使用した黒鉛も本発明外の粗粒黒鉛
を使用したことによりアークが荒くスラグが球状になる
などスラグ被包性およびビード外観が悪くなった。The welding rod C-15 has a large amount of fluoride and the slag fluidity becomes too low. At the same time, the graphite used is coarse-grained graphite other than the present invention, so that the arc is rough and the slag becomes spherical, and the slag encapsulation property and The bead appearance was bad.
溶接棒Ｃ−16は、フッ化物が少なくスラグ流動性が高
くなりすぎビード形状が凸になると同時に使用した黒鉛
粒度が本発明外のためアークが荒くスラグ被包性が悪く
なった。In the welding rod C-16, the fluoride content was low and the slag fluidity was too high, and the bead shape was convex, and at the same time, the graphite grain size used was outside the scope of the present invention, so the arc was rough and the slag encapsulation was poor.
溶接棒Ｃ−17は、黒鉛がすくなく溶接作業性は満足す
るものであったが溶接金属中の炭素量が低く機械的性能
がやや悪く満足する性能が得られなかった。The welding rod C-17 had less graphite and was satisfactory in welding workability, but the amount of carbon in the weld metal was low and the mechanical performance was a little poor and satisfactory performance was not obtained.
溶接棒Ｃ−18は、黒鉛が多くアークが弱くなりすぎて
ビードの広がりに欠け凸ビードとなった。又、溶接金属
中の炭素量が多くなり機械的性能、特に溶接金属の耐割
れ性にやや問題があった。The welding rod C-18 had a large amount of graphite and the arc became too weak, and the bead spread was lacked to form a convex bead. Further, the amount of carbon in the weld metal is increased, and there is a problem in mechanical performance, particularly in crack resistance of the weld metal.
「発明の効果」 以上述べたように本発明による溶接棒は、溶接作業性
が良好で溶接欠陥の発生しない溶接が可能となり鋳物溶
接における信頼性と性能が大幅に改善されその工業的価
値は高い。[Advantages of the Invention] As described above, the welding rod according to the present invention has good welding workability and enables welding without generation of welding defects, and reliability and performance in casting welding are greatly improved, and its industrial value is high. .
フロントページの続き (72)発明者 佐藤 等 神奈川県相模原市淵野辺５―10―１ 新 日本製鐵株式會社第２技術研究所内 (56)参考文献 特開 昭60−106694（ＪＰ，Ａ) 特公 昭56−7798（ＪＰ，Ｂ２)Continuation of the front page (72) Inventor Sato et al. 5-10-1 Fuchinobe, Sagamihara City, Kanagawa Pref., Second Research Laboratory, Nippon Steel Corp. (56) Reference Japanese Patent Laid-Open No. 60-106694 (JP, A) 56-7798 (JP, B2)
Claims (1)
質Feからなる心線の外周に炭酸塩;30〜60％、金属フッ
化物;1〜10％、硅酸塩;1〜15％、有機物１〜10％、粒度
が１〜32ミクロンが85％以上で、かつ１〜12ミクロンが
50％以上から構成される微粒黒鉛を８〜20％含有する被
覆剤を溶接棒全重量に対して10〜30％塗布した後、100
〜280℃の温度で乾燥したことを特徴とした鋳鉄用被覆
アーク溶接棒。1. A core wire comprising 40% or more by weight of Ni and the balance being essentially Fe, with a balance of carbonate: 30-60%, metal fluoride: 1-10%, silicate; 1 -15%, organic matter 1-10%, particle size 1-32 micron is 85% or more, and 1-12 micron
After applying a coating agent containing 8 to 20% of fine graphite composed of 50% or more to 10 to 30% of the total weight of the welding rod, 100
A coated arc welding rod for cast iron, which is characterized by being dried at a temperature of ~ 280 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1284590A JP2674843B2 (en) | 1989-10-31 | 1989-10-31 | Coated arc welding rod for cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1284590A JP2674843B2 (en) | 1989-10-31 | 1989-10-31 | Coated arc welding rod for cast iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03146298A JPH03146298A (en) | 1991-06-21 |
| JP2674843B2 true JP2674843B2 (en) | 1997-11-12 |
Family
ID=17680426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1284590A Expired - Lifetime JP2674843B2 (en) | 1989-10-31 | 1989-10-31 | Coated arc welding rod for cast iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2674843B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817465A (en) * | 2012-11-16 | 2014-05-28 | 李彬 | Fluoride welding rod |
| CN105108377A (en) * | 2015-08-13 | 2015-12-02 | 江苏新航合金科技有限公司 | Nickel alloy welding wire for welding cast iron pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI67386C (en) * | 1979-06-21 | 1985-03-11 | Hoffmann La Roche | FOERFARANDE FOER FRAMSTAELLNING AV NYA THERAPEUTIC EQUIPMENT |
| JPS60106694A (en) * | 1983-11-14 | 1985-06-12 | Mitsubishi Heavy Ind Ltd | Production of welding rod for cast iron |
-
1989
- 1989-10-31 JP JP1284590A patent/JP2674843B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03146298A (en) | 1991-06-21 |
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