JPH0284295A - Flux cored wire for self-shielded arc welding - Google Patents
Flux cored wire for self-shielded arc weldingInfo
- Publication number
- JPH0284295A JPH0284295A JP23735488A JP23735488A JPH0284295A JP H0284295 A JPH0284295 A JP H0284295A JP 23735488 A JP23735488 A JP 23735488A JP 23735488 A JP23735488 A JP 23735488A JP H0284295 A JPH0284295 A JP H0284295A
- Authority
- JP
- Japan
- Prior art keywords
- flux
- welding
- self
- shielded arc
- cored wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 59
- 230000004907 flux Effects 0.000 title claims abstract description 24
- 229910001512 metal fluoride Inorganic materials 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 5
- 229910001148 Al-Li alloy Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 14
- 239000002893 slag Substances 0.000 description 16
- 239000011324 bead Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000002994 raw material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 4
- 229910052808 lithium carbonate Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 239000010436 fluorite Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 241000254032 Acrididae Species 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 208000008238 Muscle Spasticity Diseases 0.000 description 1
- 229910018062 Ni-M Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910001632 barium fluoride Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- JXGGISJJMPYXGJ-UHFFFAOYSA-N lithium;oxido(oxo)iron Chemical compound [Li+].[O-][Fe]=O JXGGISJJMPYXGJ-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 208000018198 spasticity Diseases 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Landscapes
- Nonmetallic Welding Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はセルフシールドアーク溶接フラックス入りワイ
ヤに係り、特に溶接欠陥のない健全な溶接部を安定して
得ることができるセルフシールドアーク溶接フラックス
入りワイヤに関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a self-shielded arc welding flux-cored wire, and in particular to a self-shielded arc welding flux-cored wire that can stably obtain a sound welded part without welding defects. Regarding wires.
（従来の技術及び解決しようとする課題）セルフシール
ドアーク溶接は、風によりピット。(Conventional technology and problems to be solved) Self-shielded arc welding causes pits due to wind.
ブローホール等の欠陥が生じる危険が少なく、また、外
部からのシールドガスを必要としないことから取扱いが
容易であるなど、屋外溶接に適した特長を持っており、
建設現場に適した溶接法と云える。It has features suitable for outdoor welding, such as low risk of blowholes and other defects, and ease of handling as it does not require external shielding gas.
It can be said that this welding method is suitable for construction sites.
しかし乍ら、セルフシールドアーク溶接は上記利点を有
するものの、溶接条件による作業性の変化が著しく大き
いため、高度の溶接技輌を必要とし、厚板の多層溶接な
どでは、溶接欠陥（スラグインクルージヨン、融合不良
）の発生機会が多く、健全な溶接部を得ることは極めて
困難と云える。However, although self-shielded arc welding has the above-mentioned advantages, the workability changes significantly depending on the welding conditions, so it requires advanced welding techniques, and when welding thick plates in multiple layers, welding defects (slag inclusions, etc.) , poor fusion) occur, and it can be said that it is extremely difficult to obtain a sound weld.
建設現場で常用される横向姿勢では特に欠陥が生じ易い
。このため、建設現場の溶接には、ガスシールドアーク
溶接が適用されている。Defects are particularly likely to occur in the horizontal position commonly used at construction sites. For this reason, gas shielded arc welding is used for welding at construction sites.
しかし、ガスシールドアーク溶接では、風の影響を受は
易いことから防風対策を講じる必要があり、特に風速の
強い時には溶接作業を中断しなければならない等の欠点
がある。However, gas-shielded arc welding is susceptible to the effects of wind, so it is necessary to take wind-proof measures, and there are drawbacks such as the welding work having to be interrupted especially when the wind speed is strong.
このようなことから、容易に健全な溶接部が得られるセ
ルフシールドアーク溶接ワイヤの開発が望まれており、
従来より種々の提案がある。例えば、特公昭６２−２５
４７９号等が提案されているが、横向溶接に対しては必
ずしも十分とはいえない。For this reason, there is a desire to develop a self-shielded arc welding wire that can easily produce sound welds.
There have been various proposals so far. For example,
No. 479 and the like have been proposed, but they are not necessarily sufficient for horizontal welding.
本発明は、上記従来技術の欠点を解消して、特に横向姿
勢の多層溶接でも溶接欠陥の発生率が極めて少なく、靭
性及び曲げ延性等の溶接性能の優れたセルフシールドア
ーク７ｓ接フラックス入りワイヤを提供することを目的
とするものである。The present invention solves the above-mentioned drawbacks of the prior art, and provides a self-shielded arc 7S welding flux-cored wire that has an extremely low incidence of welding defects even in multilayer welding in a horizontal position, and has excellent welding performance such as toughness and bending ductility. The purpose is to provide
（課題を解決するための手段）
前記目的を達成するため、本発明者は、まず、従来のセ
ルフシールドアーク１容接フラックス入りワイヤによる
溶接部において溶接欠陥が発生し易い要因について分析
したところ、以下のような要因により溶接欠陥が発生し
易いことが判明した。(Means for Solving the Problems) In order to achieve the above object, the present inventor first analyzed the factors that tend to cause welding defects in welds using conventional self-shielded arc single-contact flux-cored wire. It has been found that welding defects are likely to occur due to the following factors.
■ビードが凸状になるため、ビードとビードの間に狭い
溝を形成し、スラグインクルージヨンや融合不良が生じ
る。■Since the beads are convex, narrow grooves are formed between the beads, resulting in slag inclusions and poor fusion.
■ビードが垂れ落ち易いため、コールトラップを形成す
る。■Beads tend to drip, forming coal traps.
■ビードの揃いが不良のため、凹凸が生じ、融合不良や
スラグインクルージヨンの原因になる。■Improper bead alignment causes unevenness, which can lead to poor fusion and slag inclusions.
■ビートにスラグが焼付くので十分な除去が困難であり
、焼付いたスラグの上から溶接した場合にはスラグイン
クルージヨンやコールドラップを生じ易い。■Since slag is baked into the beat, it is difficult to remove it sufficiently, and when welding over baked-on slag, slag inclusions and cold laps are likely to occur.
■アークが安定しないため、安定した溶込みや安定した
溶融状況が得にくく、溶接欠陥の原因になり易い。■Since the arc is not stable, it is difficult to obtain stable penetration and stable melting conditions, which can easily cause welding defects.
■ワイヤの突出し長さが短くなったり、またアーク電圧
が高すぎるとピットが発生し、条件変動に弱く、溶接条
件範囲が狭い。■If the protruding length of the wire becomes short or the arc voltage is too high, pits will occur, making it vulnerable to condition fluctuations and narrowing the range of welding conditions.
これらの要因のうち、■〜■はスラグの物性に起因し、
■はフラックス率の安定性に起因し、■はシールド性に
基因するものと考えられる。Among these factors, ■～■ are due to the physical properties of the slag,
It is thought that (2) is due to the stability of the flux rate, and (2) is due to the shielding property.
そこで５本発明者は、シールド性を強化し、スラグに適
正な物性を与えると共に、フラックス率の安定したフラ
ックス入りワイヤを作成することによって健全な溶接部
が得られるとの知見に基づいて鋭意研究を重ねた。Therefore, the present inventor conducted extensive research based on the knowledge that a healthy weld can be obtained by strengthening the shielding property, giving appropriate physical properties to the slag, and creating a flux-cored wire with a stable flux rate. layered.
その結果、鋼製外皮に充填するフラックスとして金属弗
化物、金属炭酸塩、Ｌｉ、脱酸剤、鉄粉等を必須成分と
して調整し且つフラックス率を規制することにより可能
であることを見い出し、ここに本発明をなしたものであ
る。As a result, we discovered that it is possible to fill the steel shell with metal fluorides, metal carbonates, Li, deoxidizing agents, iron powder, etc. as essential components and by regulating the flux rate. The present invention has been made in this way.
すなわち、本発明に係るセルフシールドアーク溶接フラ
ンクス入りワイヤは、鋼製外皮中に、金属弗化物：１８
〜３０％、
金属炭酸塩：２〜１５％、
Ｌｌ：０．１〜４％、
Ａｌ：８〜１５％、
Ｍｇ：３〜１０％。That is, the self-shielded arc welding flank-cored wire according to the present invention contains metal fluoride: 18 in the steel outer sheath.
-30%, metal carbonate: 2-15%, Ll: 0.1-4%, Al: 8-15%, Mg: 3-10%.
Ｍｎ：０．２〜８％、
鉄粉：３０〜６０％、
但し、金層弗化物／鉄粉：０．４〜０．７％を必須成分
として含有する組成のフラックスをフラックス率が１７
〜２３％重量％となるように充填してなることを特徴と
するものである。Mn: 0.2 to 8%, iron powder: 30 to 60%, however, a flux with a composition containing gold layer fluoride/iron powder: 0.4 to 0.7% as essential components is used when the flux rate is 17%.
It is characterized by being filled so that the amount is 23% by weight.
以下に本発明を更に詳細に説明する。The present invention will be explained in more detail below.
（作用）
まず、本発明のセルフシールドアーク溶接フラックス入
りワイヤに用いるフラックスの成分限定理由を説明する
。(Function) First, the reason for limiting the components of the flux used in the self-shielded arc welding flux-cored wire of the present invention will be explained.
倉且兆■璽：
金属弗化物はシールド剤であると共に主要な造滓剤であ
り、１８〜３０％の範囲で添加する。Note: Metal fluoride is a shielding agent as well as a major slag-forming agent, and is added in a range of 18 to 30%.
添加量が多いほどシールド効果を増すが、スパッタ及び
ヒユーム量が過大になり、溶接作業性を著しく損なう。The shielding effect increases as the amount added increases, but the amount of spatter and fume becomes excessive, which significantly impairs welding workability.
そして、３０％を超える量ではスラグの融点を上げ、横
向などの姿勢溶接においてはビードが垂れ落ち易く、ま
たコールドラップの原因となる。シールド性及び作業性
のからみからみて、最適含有量は２０〜２６％であるが
、上限値以下であれば許容できる。一方、金属弗化物量
は少ないほど作業性向上の傾向にあるが、過少になると
シールドが不十分になり、ピット、ブローホール等の欠
陥が生じるので、下限値は１８％にとどめるのが望まし
い。If the amount exceeds 30%, the melting point of the slag will increase, and in horizontal welding, the beads will tend to drip down, and this will cause cold lap. From the viewpoint of shielding properties and workability, the optimum content is 20 to 26%, but it is permissible as long as it is below the upper limit. On the other hand, the lower the amount of metal fluoride, the better the workability tends to be, but if it is too small, shielding becomes insufficient and defects such as pits and blowholes occur, so it is desirable to keep the lower limit at 18%.
なお、金属弗化物としては５種々のものが使用できるが
、スラブの剥離性や耐吸湿性の点から蛍石（ＣａＦ２）
が最も望ましい。この蛍石量の一部をＬｉＦ、に、Ｓｉ
Ｆ、、ＮａＦ、ＢａＦ２等で置換すると溶滴移行をスム
ーズにして、吹き付は等を改善できるなどの好ましい影
響を与えるが、過大になるとスラグの剥離性等を損ない
、却ってスパッタ量が増すので、置換量は１０％以下に
するのがよい。Five different metal fluorides can be used, but fluorite (CaF2) is preferred from the viewpoint of slab releasability and moisture absorption resistance.
is the most desirable. A part of this amount of fluorite is converted into LiF, Si
When replaced with F, NaF, BaF2, etc., it has favorable effects such as smoothing the droplet transfer and improving spraying, but if it is excessive, it impairs the slag releasability and on the contrary increases the amount of spatter. The amount of substitution is preferably 10% or less.
金、１！ＪＬ東：
金属炭酸塩はスラグの剥離性及びスラグの粘性を好まし
いものにする作用がある。したがって、光沢のあるビー
ド表面が得られると共にビードの垂れ落ちを改善し、均
一で平滑なビード形状が得られる。更にはシールド剤と
しても作用するものである。そのために、金属炭酸塩は
２〜１５％の範囲で添加する。Money, 1! JL Higashi: Metal carbonates have the effect of improving the peelability and viscosity of slag. Therefore, a glossy bead surface is obtained, and the dripping of the bead is improved, and a uniform and smooth bead shape is obtained. Furthermore, it also acts as a shielding agent. For this purpose, the metal carbonate is added in a range of 2 to 15%.
添加量が多いほどスラグの剥離性、ビート形状、シール
ド性は改善されるが、１５％を超えて過大になると溶接
時に発生する分解ガス（ＣＯ２）のため著しく大粒の叉
バッタが発生し、作業性上望ましくない。最適量は４〜
７％であるが、１５％までは許容できる。一方、含有量
が２％より少なすぎるとスラブが焼付く傾向にあり、ま
たスラブの粘性が低くなるので均一で平滑なビード形状
が得られない。The greater the amount added, the better the slag releasability, bead shape, and shielding properties are, but if it exceeds 15%, extremely large particles of grasshopper will be generated due to the decomposed gas (CO2) generated during welding, making it difficult to work. Sexually undesirable. The optimal amount is 4~
7%, but up to 15% is acceptable. On the other hand, if the content is less than 2%, the slab tends to seize and the viscosity of the slab becomes low, making it impossible to obtain a uniform and smooth bead shape.
なお、金属炭酸塩としては、ＣａＣ○、が最も適当であ
るが、その他にはＢａＣＯ２、ＳｒＣＯ２、Ｌｉ２Ｃ０
，等も１種以上併用することができる。The most suitable metal carbonate is CaC○, but other examples include BaCO2, SrCO2, Li2C0.
, etc. can also be used in combination.
Ｌｉ：
Ｌｉはアーク電圧及び突出し長さの変動によるピットの
発生を抑制する効果があるので０．１〜４％の範囲で添
加する。Li: Li has the effect of suppressing the generation of pits due to fluctuations in arc voltage and protrusion length, so it is added in a range of 0.1 to 4%.
第１図はＬｉを含有しないセルフシールドアーク溶接フ
ラックス入りワイヤについて、ビードオンプレート溶接
法でテストした結果を示したもので、突出し長さが短く
なるとピットが発生する状況を示したものである。FIG. 1 shows the results of testing a self-shielded arc welding flux-cored wire that does not contain Li using the bead-on-plate welding method, and shows the situation in which pits occur as the protrusion length becomes shorter.
第１図の結果より、ピットが発生し易い突出し長さ（１
５ｍｍ）にして、Ｌｉを含有するセルフシールドアーク
溶接フラックス入りワイヤについてテストした結果を示
したものが第２図である。同図より、ＬＬがピン１〜の
抑制及びアーク電圧範囲の拡大に有効であることが判る
。しかし、０．１％未満では効果が少なく、４％を超え
るとスラグが流れ易くなり、特に横向溶接ではビードが
垂れ。From the results shown in Figure 1, the protrusion length (1
Fig. 2 shows the results of a test on a self-shielded arc welding flux-cored wire containing Li. From the figure, it can be seen that LL is effective in suppressing pin 1 and expanding the arc voltage range. However, if it is less than 0.1%, the effect will be small, and if it exceeds 4%, the slag will flow easily, and the bead will sag, especially in horizontal welding.
凸状になるので好ましくない。This is not desirable because it becomes convex.
なお、ＬＬ単体は大気との反応が激しいため、原料とし
て適していない。したがって、Ｌｉ源の原料としては他
の金属との合金化した粉末で使用するのが好ましく、Ａ
ｆｌ−Ｌｉが最適である。この場合、Ａｌ−ＬｉのＬＬ
含有量は１．５〜６％程度が望ましい。６％以上では大
気との反応が激しくなり、また爆発性も増すので好まし
くない。Note that LL alone is not suitable as a raw material because it reacts violently with the atmosphere. Therefore, it is preferable to use a powder alloyed with other metals as a raw material for the Li source.
fl-Li is optimal. In this case, LL of Al-Li
The content is preferably about 1.5 to 6%. If it exceeds 6%, the reaction with the atmosphere becomes violent and the explosiveness increases, which is not preferable.
Ｌｉ源の原料としては、Ａｌ−Ｌｉの池に、炭酸リチウ
ム、リチウムフェライト、リチウムマンガネート、リチ
ウムジルコネート、リチウムシリケート等が使用できる
。なお、炭酸リチウムは分解してＣＯ２を生成し、スパ
ッタの発生を増加させるので１０％以下に抑えるのがよ
い。Ａｌ−Ｌｉや炭酸リチウム、或いは炭酸リチウム以
外の化合物を適宜併用することにより、作業性を損なう
ことなく、広い条件範囲で耐ピツト性を向上させること
ができる。As a raw material for the Li source, lithium carbonate, lithium ferrite, lithium manganate, lithium zirconate, lithium silicate, etc. can be used in an Al-Li pond. Note that lithium carbonate decomposes to produce CO2 and increases the occurrence of sputtering, so it is preferable to suppress it to 10% or less. By appropriately using Al-Li, lithium carbonate, or a compound other than lithium carbonate in combination, pit resistance can be improved over a wide range of conditions without impairing workability.
Ａ Ｑ：
Ａｌは脱酸剤として作用すると共に溶着金属中に侵入し
たＮを固定し、ピント及びブローホールを防止するので
、８〜１５％の範囲で添加する。A Q: Al acts as a deoxidizing agent and also fixes N that has entered the weld metal to prevent focusing and blowholes, so it is added in an amount of 8 to 15%.
しかし、８％未満ではピント及びブローホールが発生し
、健全な溶接部が得られない。また１５％を超えると、
溶着金属中に残存するＡｌが増加するので結晶粒が粗大
化し、著しく延性を損なうので好ましくない。なお、Ａ
ｌ原料としては金属アルミのほか、 Ｆｅ−Ａ Ｑ 、
Ａ Ｑ −Ｍｇ、 Ａ Ｑ −Ｌｉ等の合金で使用する
のが望ましい。However, if it is less than 8%, focusing and blowholes occur and a sound weld cannot be obtained. Also, if it exceeds 15%,
This is not preferable because the amount of Al remaining in the weld metal increases and the crystal grains become coarser, significantly impairing ductility. In addition, A
In addition to metal aluminum, raw materials include Fe-AQ,
It is desirable to use alloys such as AQ-Mg and AQ-Li.
」：
Ｍｇは蒸気になって溶接部のシールドを行うと共に脱酸
剤としても作用するので、３〜１０％の範囲で添加する
。しかし５３％未満ではピット。”: Mg turns into vapor and shields the weld zone, and also acts as a deoxidizing agent, so it is added in a range of 3 to 10%. However, if it is less than 53%, it will be a pit.
ブローホールの抑制が困難である。また過剰な添加はス
ラグの粘性を下げ、ビードの垂れ落ちを助長し、またヒ
ユーム量も著しく増加するので、１０％を超える添加は
好ましくない。なお、Ｍｇ原料としてはＭｇ粉末のほか
、Ａ Ｑ −Ｍｇ、 Ｆｅ −Ｓｌ−Ｍｇ、 Ｎｉ−Ｍ
ｇ、等の合金が最適である。It is difficult to suppress blowholes. Further, excessive addition lowers the viscosity of the slag, promotes dripping of beads, and also significantly increases the amount of fume, so it is not preferable to add more than 10%. In addition to Mg powder, Mg raw materials include AQ-Mg, Fe-Sl-Mg, Ni-M
Alloys such as g, etc. are optimal.
Ｍｎ：
Ｍｎは脱酸剤として作用すると共に溶着金属に適正な引
張強さを与えるので、０．２〜８％の範囲で添加する。Mn: Mn acts as a deoxidizing agent and provides appropriate tensile strength to the weld metal, so it is added in a range of 0.2 to 8%.
しかし、０．２％未満では引張強さが不足し、８％を超
えると引張強さが過剰になり、曲げ延性を著しく損なう
ので好ましくない。However, if it is less than 0.2%, the tensile strength will be insufficient, and if it exceeds 8%, the tensile strength will be excessive and the bending ductility will be significantly impaired, which is not preferable.
なお、Ｍｎ原料としてはＭｎ粉末のほか、Ｆｅ Ｍｎ
、ＦｅＦｅ−８ｉ−等の合金が適当である。In addition to Mn powder, Mn raw materials include Fe Mn
, FeFe-8i-, etc. are suitable.
灰皿：
鉄粉はフラックスの流動性を増すのでフラックス率を安
定にする。また、溶接時の作用としては、熱伝導の役割
を担い、金属弗化物の溶融を促進しているものと考えら
れる。したがって、鉄粉はアークを安定にし、且つ安定
した溶融状態が得られるので、３０〜６０％の範囲で添
加する。しかし、３０％未満ではフラックス柱の生成が
観察され。Ashtray: Iron powder increases the fluidity of the flux and stabilizes the flux rate. Furthermore, during welding, it is thought to play a role in heat conduction and promote melting of the metal fluoride. Therefore, since iron powder stabilizes the arc and provides a stable molten state, it is added in an amount of 30 to 60%. However, below 30%, formation of flux columns was observed.
溶接欠陥の抑制に好ましくなく、スパシタ増加の問題が
ある。また６０％を超えると、金属弗化物の添加量が相
対的に減少し、シールド低下等の問題が発生するので好
ましくない。なお、鉄粉のカサ比重は２．５〜３．７％
のものが望ましく、成分的には特に制約を受けない。This is not preferable for suppressing welding defects, and there is a problem of increased spasticity. Moreover, if it exceeds 60%, the amount of metal fluoride added is relatively reduced, causing problems such as a reduction in shielding, which is not preferable. In addition, the bulk specific gravity of iron powder is 2.5 to 3.7%.
There are no particular restrictions on the components.
本発明者は、鉄粉につき主要な造滓剤である金属弗化物
との関係で溶接現象を調査したところ、（金属弗化物）
／（鉄粉）の比がアーク状態と密接な関係が認められ、
０．４〜０．７％の範囲で極めて効果的であることが判
明した。The present inventor investigated welding phenomena in relation to metal fluoride, which is the main slag-forming agent for iron powder, and found that (metal fluoride)
The ratio of / (iron powder) was found to have a close relationship with the arc condition,
A range of 0.4-0.7% was found to be extremely effective.
すなわち、第３図に示すように、（金属弗化物）／（鉄
粉）の比が０．７％を超えるとアークの安定性が損なわ
れ、スパッタ発生量が増す傾向が認められる。一方、０
．４％未満では、フラックス柱の形成が認められ、シー
ルド不良等が生じる。この比を規定した点が本発明の特
長でもある。That is, as shown in FIG. 3, when the ratio of (metal fluoride)/(iron powder) exceeds 0.7%, the stability of the arc is impaired and the amount of spatter generated tends to increase. On the other hand, 0
．． If it is less than 4%, formation of flux columns is observed, resulting in poor shielding and the like. The feature of the present invention is that this ratio is defined.
以上の組成のフラックスは以下のフラックス率にて鋼製
外皮中に充填して製造することにより、目的とする溶接
性能が得られる。The desired welding performance can be obtained by filling the flux having the above composition into a steel shell at the following flux rate.
フラックス率：
ワイヤ構成中のフラックス率は１７〜２３％の範囲内に
とどめるべきである。１７％未満では必要なスラグ基が
確保できなくなるので、作業性を劣化させる。また、２
３％を超えると伸線中に断線が発生し、能率的な生産を
行うことができなくなるので避けるべきである。Flux Rate: The flux rate in the wire construction should remain within the range of 17-23%. If it is less than 17%, the necessary slag groups cannot be secured, resulting in poor workability. Also, 2
If it exceeds 3%, wire breakage will occur during wire drawing, making efficient production impossible, and should be avoided.
なお、本発明においては、必要に応じて次の成分を加え
てフラックス入りワイヤを製造することができる。In addition, in the present invention, the following components can be added as needed to manufacture the flux-cored wire.
Ｎ１：
Ｎｉは靭性を向上させるので、ワイヤ全重量当たり０．
２〜３％の範囲で添加することができる。N1: Since Ni improves toughness, it is added 0.0% per total weight of the wire.
It can be added in a range of 2 to 3%.
しかし、０．２％未満では効果が得られず、３％を超え
ると溶着金属の引張強さが過剰になり、靭性を損なうの
で好ましくない。However, if it is less than 0.2%, no effect will be obtained, and if it exceeds 3%, the tensile strength of the welded metal will become excessive and the toughness will be impaired, which is not preferable.
二乙キ水分ｌ：
ワイヤの水分量は３００〜２０００ｐｐｍの範囲が推奨
される。３００ｐｐｍ未満ではシールド性の面で、また
２０００ｐｐｍを超えると耐ピツト性、割れの面でそれ
ぞれ問題となる。なお、ワイヤの水分量は、ＪＩＳ
Ｋ ０１１３（１９７９）に準じて１ｌｌ１１定した
値である。Moisture content in the wire: It is recommended that the moisture content of the wire be in the range of 300 to 2000 ppm. If it is less than 300 ppm, it will cause problems in terms of shielding properties, and if it exceeds 2000 ppm, it will cause problems in terms of pit resistance and cracking. In addition, the moisture content of the wire is JIS
This is a value determined according to K 0113 (1979).
なお、本発明ワイヤは、上記成分を混合したフラックス
を鋼製の外皮内に充填されたものであるが、外皮の化学
成分は特に限定されないが、Ｓｊ：１％以下、Ｔｏｔａ
ｌＮ： １００ｐｐｍ以下の組成のものが望ましい。こ
れらの成分は、アーク特性に影響を与え、スパッタ発生
量を増加させる傾向にあり、特にＮはピットやブローホ
ールの原因となるので、上記のように規制するのが望ま
しい。The wire of the present invention has a steel outer sheath filled with a flux mixed with the above components, but the chemical composition of the outer sheath is not particularly limited, but Sj: 1% or less, Tota
IN: Desirably has a composition of 100 ppm or less. These components tend to affect the arc characteristics and increase the amount of spatter generated, and N in particular causes pits and blowholes, so it is desirable to control them as described above.
なお、本発明のセルフシールドアーク溶接フラックス入
りワイヤの製造方法は、通常のフラックス入りワイヤの
製造方法と特に変わるところはなく、同様に生産するこ
とができる。Note that the method for manufacturing the self-shielded arc welding flux-cored wire of the present invention is not particularly different from the method for manufacturing ordinary flux-cored wires, and can be produced in the same manner.
また、ワイヤの断面形状においても特に制限を受けるも
のではなく、第４図に例示する断面形状のものが使用で
きる。作業性の面で（ｂ）がよい。Further, the cross-sectional shape of the wire is not particularly limited, and wires having the cross-sectional shape illustrated in FIG. 4 can be used. (b) is better in terms of workability.
ワイヤ径は１．２〜２ 、４ ｍｍφのいずれも対象と
なるが、使い易さ、性能等の面より特にり、６＋ｎｍφ
、２ 、０ ｍ＋ａφがよい。The wire diameter can be either 1.2 to 2 or 4 mmφ, but from the viewpoint of ease of use and performance, it is particularly important to select a wire diameter of 6+nmφ.
, 2, 0 m+aφ is good.
対象鋼種は軟鋼、ＨＴ −５０、低温用鋼が主たる対象
であるが、特に制限を受けない。The target steel types are mainly mild steel, HT-50, and low temperature steel, but are not particularly limited.
極性は正極性（ＤＣＥＮ）が望ましい。The polarity is preferably positive (DCEN).
次に本発明の実施例を示す。Next, examples of the present invention will be shown.
（実施例）
第１表及び第２表に示す諸元により、ワイヤ径２ｍｍφ
のフラックス入りワイヤを作成した。ワイヤ断面形状は
第４図の（ｃ）の形状であり、鋼製外皮成分はＣｏ０．
０７％、Ｍｎ：０．３％、 Ｓｉ：０．１％、Ｃｒ：０
．０５％、Ｔ、Ｎニア０ｐｐｍ等である。(Example) According to the specifications shown in Tables 1 and 2, the wire diameter is 2 mmφ.
A flux-cored wire was created. The cross-sectional shape of the wire is as shown in FIG. 4(c), and the steel outer skin component is Co0.
07%, Mn: 0.3%, Si: 0.1%, Cr: 0
．． 05%, T, N near 0 ppm, etc.
次いで、このフラックス入りワイヤを用い、横向姿勢で
２５ｍｍｔのＶ形開先（ギャップ６１Ｉ１ｍ、開先角度
３５°）の半自動溶接を行い、溶接部の性能及び作業性
を調査した。なお、溶接条件はＤＣＥＮ、３００Ａ−２
４〜２６Ｖである。作業性の評価は、試験板作成時に！
！！察したものである。Next, using this flux-cored wire, semi-automatic welding was performed in a 25 mmt V-shaped groove (gap 61I1 m, groove angle 35°) in a horizontal position, and the performance and workability of the welded part were investigated. The welding conditions are DCEN, 300A-2.
It is 4-26V. Evaluate workability when creating test plates!
! ! I guessed it.
第３表は試験結果を示したもので、以下の如く考察され
る。Table 3 shows the test results, which are discussed as follows.
Ｎｎ １〜Ｎａ １０は本発明例であり、いずれも作業
性（ビード形状、スラグ剥離性、アーク安定性、スパッ
タ、ピット）が優れていると共に、溶接性能（強度、曲
げ延性、靭性、溶接欠陥）も優れており、良好な結果が
得られている。Nn 1 to Na 10 are examples of the present invention, and all have excellent workability (bead shape, slag removability, arc stability, spatter, pits), and welding performance (strength, bending ductility, toughness, welding defects). ) is also excellent and good results have been obtained.
Ｎｎ１ｌ〜Ｎα１２は金属炭酸塩の配合比が適切でない
比較例であり、多すぎるとアーク不安定で、スパッタ量
が多く、溶接性能も良くない。少なすぎるとピトー形状
、スラブ剥離性が悪く、溶接性能も良くない。Nn11 to Nα12 are comparative examples in which the blending ratio of metal carbonate is not appropriate; if it is too large, the arc becomes unstable, the amount of spatter is large, and the welding performance is not good. If it is too small, the pitot shape and slab peelability will be poor, and the welding performance will also be poor.
Ｎα１３〜Ｎｎ １４は金属弗化物の配合量が適切でな
い比較例であり、多すぎるとスパッタが多く溶接作業性
が悪い。少なすぎると溶接欠陥が多くなる。Nα13 to Nn14 are comparative examples in which the amount of metal fluoride compounded is not appropriate, and if it is too large, there will be a lot of spatter and welding workability will be poor. If it is too small, welding defects will increase.
Ｎα１５〜Ｎ［１１６はＬｉの配合量が適切でない比較
例であり、少なすぎるとピットが多く、？８接性能も良
くない。多すぎるとビート形状の面で悪く。Nα15 to N[116 are comparative examples in which the amount of Li blended is not appropriate, and if it is too small, there will be many pits. 8 contact performance is also not good. If there is too much, the beat shape will be bad.
溶接性能も良くない。Welding performance is also not good.
ＮＱｌ ７−Ｎｎ １８は（金属弗化物）／（鉄粉）の
比が適切でない比較例であり、この比が高すぎるとスパ
ッタが多く、少なすぎると溶接性能が劣る。NQl 7-Nn 18 is a comparative example in which the ratio of (metal fluoride)/(iron powder) is not appropriate; if this ratio is too high, there will be a lot of spatter, and if this ratio is too low, the welding performance will be poor.
Ｎα１９〜Ｎα２０はＭｇ及びＡｌの配合比が適切でな
い比較例であり、Ｎα２１〜Ｎ０２２はＭｎ及びＮｉの
配合量が多すぎる比較例であり、Ｎａ ２３〜Ｎａ ２
４は鉄粉の配合比が適切でない比較例であり、いずれの
比較例も良い結果が得られなかった。Nα19 to Nα20 are comparative examples in which the blending ratio of Mg and Al is not appropriate, Nα21 to N022 are comparative examples in which the blending amounts of Mn and Ni are too large, and Na23 to Na2
No. 4 is a comparative example in which the blending ratio of iron powder was not appropriate, and good results were not obtained in any of the comparative examples.
またＮα２５はフラックス率が適性でない比較例であり
、良い結果が得られなかった。Further, Nα25 is a comparative example in which the flux rate is not appropriate, and good results were not obtained.
（以下余白）
（発明の効果）
以上詳述した如く、本発明のセルフシールドアーク溶接
フラックス入りワイヤによれば、容易に健全な溶接部を
得ることができ、特に、従来のセルフシールドアーク溶
接では溶接性能（欠陥、曲げ性能等）が十分保障されな
かった横向溶接部の健全性を画期的に向上させることが
できる。(Left below) (Effects of the Invention) As detailed above, according to the self-shielded arc welding flux-cored wire of the present invention, a sound weld can be easily obtained, and in particular, when conventional self-shielded arc welding The soundness of horizontal welds where welding performance (defects, bending performance, etc.) was not sufficiently guaranteed can be dramatically improved.
第１図は従来のフラックス入りワイヤ（Ｌｉ無添加のも
の）における突き出し長さの変動によるピット発生状況
を示した図、
第２図は本発明のフラックス入りワイヤにおけるＬｉ含
有量とピット数及びピットの発生しない上限電圧の関係
を示した図、
第３図は（金属弗化物）／（鉄粉）の比とスパッタ及び
溶着金属中のＮ量との関係を示した図、第４図（ａ）〜
（ｄ）はフラックス入りワイヤの断面形状の一例を示す
図である。
ｌ・・・外皮金属、２・・フラックス。Figure 1 shows the occurrence of pits due to variations in protrusion length in a conventional flux-cored wire (without Li added). Figure 2 shows the Li content, number of pits, and pits in the flux-cored wire of the present invention. Figure 3 shows the relationship between the (metal fluoride)/(iron powder) ratio and the amount of N in the sputtered and deposited metal, and Figure 4 (a) ) ~
(d) is a diagram showing an example of the cross-sectional shape of a flux-cored wire. l...Sheath metal, 2...Flux.
Claims (4)
物：１８〜３０％、 金属炭酸塩：２〜１５％、 Ｌｉ：０．１〜４％、 Ａｌ：８〜１５％、 Ｍｇ：３〜１０％、 Ｍｎ：０．２〜８％、 鉄粉：３０〜６０％、 但し、金属弗化物／鉄粉：０．４〜０．７％を必須成分
として含有する組成のフラックスをフラックス率が１７
〜２３％重量％となるように充填してなることを特徴と
するセルフシールドアーク溶接フラックス入りワイヤ。(1) In the steel shell, in terms of weight percent (the same applies hereinafter): metal fluoride: 18 to 30%, metal carbonate: 2 to 15%, Li: 0.1 to 4%, Al: 8 to 15% , Mg: 3 to 10%, Mn: 0.2 to 8%, iron powder: 30 to 60%, however, a composition containing metal fluoride/iron powder: 0.4 to 0.7% as an essential component. Flux rate is 17
A self-shielded arc welding flux-cored wire characterized in that it is filled to a content of ~23% by weight.
請求項１に記載のセルフシールドアーク溶接フラックス
入りワイヤ。(2) The self-shielded arc welding flux-cored wire according to claim 1, containing 0.2 to 3% Ni based on the total weight of the wire.
請求項１に記載のセルフシールドアーク溶接フラックス
入りワイヤ。(3) The self-shielded arc welding flux-cored wire according to claim 1, wherein the wire has a moisture content of 300 to 2000 ppm.
５〜６．５％）粉末が使用される請求項１に記載のセル
フシールドアーク溶接フラックス入りワイヤ。(4) Al-Li alloy as a Li source (Li content: 1.
5-6.5%) self-shielded arc welding flux-cored wire according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63237354A JP2519308B2 (en) | 1988-09-21 | 1988-09-21 | Self shielded arc welding flux cored wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63237354A JP2519308B2 (en) | 1988-09-21 | 1988-09-21 | Self shielded arc welding flux cored wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0284295A true JPH0284295A (en) | 1990-03-26 |
| JP2519308B2 JP2519308B2 (en) | 1996-07-31 |
Family
ID=17014152
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63237354A Expired - Fee Related JP2519308B2 (en) | 1988-09-21 | 1988-09-21 | Self shielded arc welding flux cored wire |
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| Country | Link |
|---|---|
| JP (1) | JP2519308B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090321404A1 (en) * | 2008-06-27 | 2009-12-31 | Lincoln Global, Inc. | Addition of rare earth elements to improve the performance of self shielded electrodes |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2628762B2 (en) | 1989-09-29 | 1997-07-09 | 株式会社神戸製鋼所 | Self-shielded arc welding flux cored wire |
| JP2628765B2 (en) | 1989-11-16 | 1997-07-09 | 株式会社神戸製鋼所 | Flux-cored wire for self-shielded arc welding |
| JP2672171B2 (en) | 1990-03-06 | 1997-11-05 | 株式会社神戸製鋼所 | Enclosed arc welding method |
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- 1988-09-21 JP JP63237354A patent/JP2519308B2/en not_active Expired - Fee Related
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|---|---|---|---|---|
| US3488469A (en) * | 1968-03-08 | 1970-01-06 | Lincoln Electric Co | High impact cored welding electrode |
| US3566073A (en) * | 1968-04-03 | 1971-02-23 | Lincoln Electric Co | Out-of-position automatic cored welding electrode |
| US3702390A (en) * | 1970-02-10 | 1972-11-07 | Murex Welding Processes Ltd | Arc welding |
| US3742185A (en) * | 1971-05-07 | 1973-06-26 | Lincoln Electric Co | Lithium containing welding electrode |
| US3778588A (en) * | 1972-03-29 | 1973-12-11 | Int Nickel Co | Self-shielding cored wire to weld cast iron |
| JPS49111844A (en) * | 1973-02-26 | 1974-10-24 | ||
| US3947655A (en) * | 1974-05-15 | 1976-03-30 | The Lincoln Electric Company | Cored type electrode welding |
| JPS5114097A (en) * | 1974-07-25 | 1976-02-04 | Omron Tateisi Electronics Co | Insatsubutsuno moyoshikibetsusochi |
| JPS5226221A (en) * | 1975-08-22 | 1977-02-26 | Canon Inc | Retrofocus type wide angle lens |
| JPS5226498A (en) * | 1975-08-22 | 1977-02-28 | Seiko Epson Corp | Permanent magnet and its manufactured process |
| JPS5227034A (en) * | 1975-08-27 | 1977-03-01 | Nippon Steel Corp | Fluxxcored wire for high speed welding |
| JPS5326219A (en) * | 1976-08-24 | 1978-03-10 | Daido Steel Co Ltd | High chrome nickel alloy with improved workability |
| US4149063A (en) * | 1977-03-28 | 1979-04-10 | The International Nickel Company, Inc. | Flux cored wire for welding Ni-Cr-Fe alloys |
| JPS58148095A (en) * | 1982-02-27 | 1983-09-03 | Kobe Steel Ltd | Wire for self-shielded arc welding |
| US4571480A (en) * | 1984-02-27 | 1986-02-18 | Kabushiki Kaisha Kobe Seiko Sho | Flux cored wire electrodes for self-shielded arc welding |
| JPS61286090A (en) * | 1985-06-12 | 1986-12-16 | Daido Steel Co Ltd | Flux-cored wire for arc welding |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090321404A1 (en) * | 2008-06-27 | 2009-12-31 | Lincoln Global, Inc. | Addition of rare earth elements to improve the performance of self shielded electrodes |
| US9138831B2 (en) * | 2008-06-27 | 2015-09-22 | Lincoln Global, Inc. | Addition of rare earth elements to improve the performance of self shielded electrodes |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2519308B2 (en) | 1996-07-31 |
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