JPH0146231B2 - - Google Patents
Info
- Publication number
- JPH0146231B2 JPH0146231B2 JP54097219A JP9721979A JPH0146231B2 JP H0146231 B2 JPH0146231 B2 JP H0146231B2 JP 54097219 A JP54097219 A JP 54097219A JP 9721979 A JP9721979 A JP 9721979A JP H0146231 B2 JPH0146231 B2 JP H0146231B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- gas
- hydrogen
- arc
- amount
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Description
【発明の詳細な説明】
この発明は、耐水素誘起われ鋼のガスシールド
アーク溶接法に関するものである。DETAILED DESCRIPTION OF THE INVENTION This invention relates to a process for gas-shielded arc welding of hydrogen-resistant induced steel.
耐水素誘起われ対策として希土類元素（以下
「RE」と略す）及び／又はカルシウム（以下
「Ca」と略す）の添加の有効性については既知で
あるが、ガスシールドアーク溶接に際して溶接性
に問題がある。 Although it is known that the addition of rare earth elements (hereinafter referred to as "RE") and/or calcium (hereinafter referred to as "Ca") is effective as a countermeasure against hydrogen-induced corrosion, there are problems with weldability during gas-shielded arc welding. be.
この発明はかような限局条件における溶接性の
改善を目的とするものである。 The object of the present invention is to improve weldability under such localized conditions.
近年エネルギー需要の増大にともない、極寒地
あるいは深海底より採取した石油またはガス資源
を安全かつ能率的に輸送するために、高品質パイ
プヘの要求が一段と高まつている。ここにパイプ
メーカー、パイプユーザーにとつて最も重大な問
題は、使用中のパイプ破壊である。最近の非破壊
検査技術の進歩とあいまつて破壊の発生源となる
ようなパイプ製造時の内部欠陥はほとんど皆無に
することも可能となつたが、パイプ内搬送物質か
らもたらされる水素ガスによる水素誘起われ（以
下「HIC」と略す）はその予防が著しく困難であ
る。 With the increase in energy demand in recent years, the demand for high-quality pipes has increased further in order to safely and efficiently transport oil or gas resources extracted from extremely cold regions or the deep seabed. The most serious problem for pipe manufacturers and pipe users is pipe breakage during use. Coupled with recent advances in non-destructive testing technology, it has become possible to almost completely eliminate internal defects during pipe manufacturing that can cause fractures; We (hereinafter abbreviated as "HIC") find it extremely difficult to prevent it.
パイプのみならず硫化水素など水素源の多い環
境下で用いられる鋼材は環境脆化としてHICの危
険にさらされている。 Steel materials used not only in pipes but also in environments with many hydrogen sources such as hydrogen sulfide are at risk of HIC due to environmental embrittlement.
一方このようなHICを予防するために鋼メーカ
ーらは種々の研究から、HICは鋼板中の延展した
マンガンサルフアイド（MnS）と水素の結合に
起因すること、そして鋼中にRE及び／又はCaを
添加してＳと結合させ、MnSの形成を阻止する
ことがHIC対策に有効であることを見出し、すで
にその実用の段階に到達しつつあつて、今後はま
すますこの種の耐HIC鋼の需要は増大の一途をた
どると考えられる。 On the other hand, in order to prevent such HIC, steel manufacturers have based on various studies that HIC is caused by the bonding of expanded manganese sulfide (MnS) and hydrogen in steel sheets, and that RE and/or Ca We have discovered that adding MnS to combine with S and prevent the formation of MnS is effective as a countermeasure against HIC, and we have already reached the stage of practical use of this method. Demand is expected to continue to increase.
ところで鋼板はほとんど不可欠に溶接加工によ
つて鋼構造体に形成され、自動溶接技術の進歩の
結果、手溶接に匹敵する以上にガスシールドアー
ク溶接が多用されているのが現状であつて、パイ
プを連結する円周溶液の場合もその例にもれな
い。 By the way, steel plates are almost always formed into steel structures by welding, and as a result of advances in automatic welding technology, gas-shielded arc welding is now used more frequently than manual welding. The case of a circumferential solution that connects is no exception.
上記のような新規な鋼種である耐HIC鋼のガス
シールドアーク溶接性について発明者らが検討を
行つた結果、
RE及び／又はCaは、発明者らが見出したパ
ラメータのもとに相加的に溶接作業性への悪影
響をもたらすこと、
この悪影響は溶接電流に依存するワイヤから
の溶滴移行形態によつて特性が異なること、
それぞれに対しワイヤ組成とシールドガス組
成を総合的に適正選択することにより良好なガ
スシールドアーク溶接が行えること
が見出された。 As a result of the inventors' study on the gas-shielded arc weldability of HIC-resistant steel, which is a new steel type as mentioned above, RE and/or Ca are additive based on the parameters found by the inventors. This has an adverse effect on welding workability, and the characteristics of this adverse effect vary depending on the form of droplet transfer from the wire, which depends on the welding current.The wire composition and shielding gas composition should be comprehensively selected appropriately for each. It has been found that good gas-shielded arc welding can be performed by this method.
ガスシールドアーク溶接におけるシールドガス
としては、一般にCO2単独又はCO2とArなどの不
活性ガスとの混合ガスが用いられまた溶接ワイヤ
には、通常のＣ、Si、Mnとともに、必要に応じ
る合金成分としてNi、Cr、Mo、Ｂなどを含み、
また不可避にＰ、Ｓが混入する以外に、脱酸剤と
してAl、Tiを含有する場合も多い。 The shielding gas in gas-shielded arc welding is generally CO 2 alone or a mixture of CO 2 and an inert gas such as Ar, and the welding wire is made of ordinary C, Si, Mn, as well as alloys as required. Contains Ni, Cr, Mo, B, etc. as ingredients,
In addition to unavoidably containing P and S, Al and Ti are often contained as deoxidizing agents.
このうち溶接ワイヤ組成についてREやCaのご
ときがアーク特性に影響を及ぼすことは、古くか
ら定性的に知られてはいたが、従来これらの元素
は積極的にワイヤや鋼板などに添加されることは
なく、その必要もなかつたことからそれらのシー
ルドガスアーク溶接性への悪影響のごときはその
実態として全く把握されていない。なお鋼板中の
REによるアーク溶接性への影響に関しては若干
の報告はあるが、上記HIC対策としてはREと同
時にCa添加を不可欠とする場合が多くこれらの
影響を把握しない限りにおいては、耐HIC鋼のガ
スシールドアーク溶接に適合し得ないのである。 It has been qualitatively known for a long time that RE and Ca in the welding wire composition affect arc characteristics, but in the past these elements were not actively added to wires or steel plates. Since there is no such thing and there is no need to do so, the actual situation is completely unknown regarding their adverse effects on shielded gas arc weldability. In addition, in the steel plate
Although there have been some reports regarding the effects of RE on arc weldability, in many cases it is essential to add Ca at the same time as RE as a countermeasure against HIC, unless these effects are understood, gas shielding of HIC-resistant steel It is not suitable for arc welding.
つまり従来公知の技術にあつては、
シールドガス溶接におけるアーク不安定に対
するREとCaの単独または複合挙動の具体的な
内容、
溶接条件、ワイヤ組成、シールドガス組成に
関連した溶接時のアーク不安定発生状況の詳
細、が把握されていなかつたと同時に、当然
それに対処すべき具体的、定量的方法
は見出されてはいなかつたのである。 In other words, in the case of conventionally known technology, the specific details of the individual or combined behavior of RE and Ca with respect to arc instability in shielding gas welding, arc instability during welding related to welding conditions, wire composition, and shielding gas composition The details of the situation were not understood, and at the same time, no concrete, quantitative method had been found to deal with it.
そこで発明者らは、耐HIC鋼のガスシールド溶
接のアーク安定化をはかるべく種々検討を行つた
結果、上記との間に存在する特別な関係を見
出し、同時にを可能ならしめる方法を確立した
のである。 As a result of various studies aimed at stabilizing the arc in gas shield welding of HIC-resistant steel, the inventors discovered a special relationship between the above and established a method that makes it possible to simultaneously be.
発明者らは、耐HIC鋼のガスシールドアーク特
性について検討した結果、鋼板中のRE及び／又
はCa添加量と溶接作業性の間に以下の関係があ
ることを見出した。 As a result of studying the gas-shielded arc characteristics of HIC-resistant steel, the inventors found that there is the following relationship between the amount of RE and/or Ca added in a steel sheet and welding workability.
(1) シールドガス組成がCO2100％の場合、鋼中
RE、Caの影響は次式で示すRE、Caの成分パ
ラメータ(A)に従つて相加的であり、かつパラメ
ータ(A)の値が0.10以上になるとアークが乱れて
著しく溶接が不安定になる。(1) When the shielding gas composition is 100% CO 2 ,
The influence of RE and Ca is additive according to the component parameter (A) of RE and Ca shown by the following formula, and when the value of parameter (A) exceeds 0.10, the arc becomes disordered and welding becomes extremely unstable. Become.
(A)＝（〔RE〕／0.14）＋（〔Ca〕／0.04）
式中〔 〕は表示成分含有量（wt％）
(2) 溶接不安定現象は、溶滴移行形態によつても
その様相が異なり、次にあげる何れも直流逆極
性の場合
溶接電流Ｉが約50A以上230A未満の短絡
移行領域では短絡回数の異常な低下が生じ、
溶接電流Ｉが約230A以上600A以下のグロ
ビユラー移行領域ではスパツタロスが異常発
生する。(A) = ([RE]/0.14) + ([Ca]/0.04) In the formula, [ ] is the indicated component content (wt%) (2) The welding instability phenomenon also depends on the droplet transfer form. The aspects are different, and the following cases are all DC reverse polarity: In the short circuit transition region where the welding current I is about 50A or more and less than 230A, the number of short circuits will abnormally decrease, and in the globular transition region where the welding current I is about 230A or more and less than 600A. In this case, Spatsutaros occurs abnormally.
(3) の原因は、パラメータ(A)の値が0.10以上の
場合に形成されるRE酸化物、Ca酸化物又は
RE−Ca複合酸化物から激しくアークが発生す
るようになりさらには溶接ワイヤ中にとくに
0.03％を越えてTiが含有される場合、Tiによ
る溶滴表面張力の増大効果が相乗してスムーズ
な溶滴移行が妨げられるためである。ちなみに
の原因は、パラメータ(A)に関する同一の作用
の下で、溶接ワイヤ中のTi含有量が0.03％にも
満たない場合、Tiによる脱酸不足の傾向が相
乗して溶滴の不規則移行とCOガス気泡の爆発
を起こすことによる。The cause of (3) is RE oxide, Ca oxide, or
A strong arc is generated from the RE-Ca composite oxide, and even more so, especially in the welding wire.
This is because when Ti is contained in an amount exceeding 0.03%, the effect of increasing the droplet surface tension due to Ti is compounded, and smooth droplet transfer is hindered. Incidentally, the reason for this is that under the same effect regarding parameter (A), if the Ti content in the welding wire is less than 0.03%, the tendency for insufficient deoxidation by Ti will combine to cause irregular migration of the droplets. and by causing an explosion of CO gas bubbles.
従つて、の原因はともに鋼板中のRE及
び／又はCaの含有量が上掲数式で示すパラメ
ータで(A)≧0.10となり、かつシールドガスとな
り、かつシールドガスがCO2を主体とする酸化
性雰囲気であることと、ワイヤ中のTi量との
総合的な効果が何れもスムーズな溶滴移行をも
たらすべきアーク安定化に関し重要なポイント
となつているわけである。 Therefore, the cause of both is that the content of RE and/or Ca in the steel sheet is (A) ≥ 0.10 in the parameter shown by the above formula, and that the shielding gas is an oxidizing gas mainly composed of CO 2 . The overall effect of the atmosphere and the amount of Ti in the wire are important points for arc stabilization, which should bring about smooth droplet transfer.
従つての挙動に着目してこの発明は水素誘
起われ抑止成分として希土類元素及び／又はカ
ルシウムを、それら成分量に応じる下記式に従
うパラメータ(A)の値で0.10以上となる量で含有
する耐水素誘起われ鋼を溶接母材とし、溶接電
流230〜50Aの直流逆極性のもとに、炭酸ガス
を用いてシールドガス溶接する際、
溶接ワイヤにはチタン含有量0.03wt％以下の
ものを選択する短絡移行領域アーク安定化手段
を適用すること
を特徴とする、耐水素誘起割れ鋼のガスシール
ドアーク溶接法
記
(A)＝（〔RE〕／0.14）＋（〔Ca〕／0.04）
式中〔 〕は表示成分含有量（wt％）
を解決手段とするものである。 Focusing on this behavior, the present invention proposes a hydrogen-resistant material containing rare earth elements and/or calcium as hydrogen-induced inhibiting components in an amount such that the value of parameter (A) according to the following formula according to the amount of these components is 0.10 or more. When performing shield gas welding using carbon dioxide gas under direct current reverse polarity at a welding current of 230 to 50 A using induced steel as the welding base material, select a welding wire with a titanium content of 0.03 wt% or less. Gas-shielded arc welding method for hydrogen-induced cracking-resistant steel, characterized by applying short-circuit transition region arc stabilization means Note (A) = ([RE] / 0.14) + ([Ca] / 0.04) ] uses the indicated ingredient content (wt%) as a solution.
さて第１図は、の短絡移行領域におけるパラ
メータ(A)、短絡回数、シールドガス組成およびワ
イヤ中のTi量の影響を総合的に示すものであり、
ここにパラメータ(A)が0.10以上でシールドガス組
成がCO2100％かつワイヤ中のTiが0.03％を越す
場合（●）、短絡回数は約80回から約20回へと異
常低下している。 Now, Figure 1 comprehensively shows the influence of the parameter (A), the number of short circuits, the shielding gas composition, and the amount of Ti in the wire in the short circuit transition region.
Here, when the parameter (A) is 0.10 or more, the shielding gas composition is 100% CO 2 and the Ti in the wire exceeds 0.03% (●), the number of short circuits abnormally decreases from about 80 to about 20. .
一方参考のため、のグロビユラー移行領域に
おけるパラメータ(A)、スパツタロス、シールドガ
ス組成およびワイヤ中のTi量の影響を第２図に
て総合的に示すように、何れもパラメータ(A)が
0.10以上でシールドガス組成がCO2100％、そし
てワイヤ中のTiが0.03％に満たない場合（○ぁ砲 On the other hand, for reference, as shown in Fig. 2, the effects of parameter (A), spatutal loss, shielding gas composition, and Ti content in the wire in the globular transition region are comprehensively shown.
If the shielding gas composition is 0.10 or more, CO 2 is 100%, and Ti in the wire is less than 0.03% (○†
Claims (1)
び／又はカルシウムを、それら成分量に応じる下
記式に従うパラメータ(A)の値で0.10以上となる量
で含有する耐水素誘起われ鋼を溶接母材とし、溶
接電流230〜50Aの直流逆極性のもとに、炭酸ガ
スを用いてシールドガス溶接する際、 溶接ワイヤにはチタン含有量0.03wt％以下のの
ものを選択する短絡移行領域アーク安定化手段を
適用すること を特徴とする、耐水素誘起割れ鋼のガスシールド
アーク溶接法。 記 (A)＝（〔RE〕／0.14）＋（〔Ca〕／0.04） 式中〔 〕は表示成分含有量（wt％）[Claims] 1. A hydrogen-resistant steel containing rare earth elements and/or calcium as hydrogen-induced inhibiting components in an amount such that the value of parameter (A) according to the following formula according to the amount of these components is 0.10 or more. When performing shield gas welding using carbon dioxide gas as the welding base material under direct current reverse polarity with a welding current of 230 to 50 A, select a welding wire with a titanium content of 0.03 wt% or less in the short-circuit transition region. A gas-shielded arc welding process for hydrogen-induced cracking-resistant steel, characterized by the application of arc stabilization means. Note (A) = ([RE]/0.14) + ([Ca]/0.04) In the formula, [ ] is the indicated component content (wt%)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9721979A JPS5623386A (en) | 1979-08-01 | 1979-08-01 | Gas shielded arc welding method of hydrogen-induced cracking resistance steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9721979A JPS5623386A (en) | 1979-08-01 | 1979-08-01 | Gas shielded arc welding method of hydrogen-induced cracking resistance steel |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18675887A Division JPS6349375A (en) | 1987-07-28 | 1987-07-28 | Gas shielding arc welding method for hydrogen induced cracking resisting steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5623386A JPS5623386A (en) | 1981-03-05 |
| JPH0146231B2 true JPH0146231B2 (en) | 1989-10-06 |
Family
ID=14186510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9721979A Granted JPS5623386A (en) | 1979-08-01 | 1979-08-01 | Gas shielded arc welding method of hydrogen-induced cracking resistance steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5623386A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008024977A1 (en) * | 2008-05-23 | 2009-11-26 | Linde Ag | Method of arc joining |
| CN106238960A (en) * | 2016-08-05 | 2016-12-21 | 天长市通联焊业有限公司 | A kind of low-temperature storage tank welding wire with excellent toughness and drawing property |
| CN106141498A (en) * | 2016-08-05 | 2016-11-23 | 天长市通联焊业有限公司 | A kind of Oil-gas Long-distance Transportation Pipeline high intensity welding wire |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49107937A (en) * | 1973-02-19 | 1974-10-14 | ||
| JPS5843195B2 (en) * | 1974-04-28 | 1983-09-26 | 大同特殊鋼株式会社 | Electrode steel wire for gas shield arc welding |
| JPS5425215A (en) * | 1977-07-28 | 1979-02-26 | Sumitomo Metal Ind Ltd | Method of producing steel plate excellent in anti-hydrogen sulfide cracking property |
-
1979
- 1979-08-01 JP JP9721979A patent/JPS5623386A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5623386A (en) | 1981-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3476125B2 (en) | Flux-cored wire for duplex stainless steel welding | |
| US4366364A (en) | Flux-cored wire for use in gas-shielded arc welding | |
| CN102076457B (en) | Addition of rare earth aluminides to improve performance of self shielded electrodes | |
| JP4261647B2 (en) | Flux cored wire for self-shielding welding | |
| JPS62183994A (en) | Wire for gas shielded arc welding of stainless steel | |
| KR101719797B1 (en) | Flux cored wire | |
| JPH0146231B2 (en) | ||
| JPS5950437B2 (en) | Covered arc welding rod for Cr-Mo based low alloy steel | |
| JP3551136B2 (en) | Gas shielded arc welding wire | |
| JP2711130B2 (en) | Gas shielded arc welding wire | |
| JPH0149593B2 (en) | ||
| JPH0355231B2 (en) | ||
| JP3718323B2 (en) | Flux-cored wire for multi-electrode vertical electrogas arc welding for extra heavy steel | |
| JPH07100688A (en) | Tig welding wire for high-strength cr-mo steel | |
| JPS62197294A (en) | Mig arc welding wire for austenitic stainless steel | |
| JPH10180488A (en) | Flux-cored wire for electrogas arc welding | |
| JPH01262094A (en) | Low hydrogen type coated electrode | |
| JPH0677837B2 (en) | Gas-shielded arc welding method for hydrogen-induced induction cracked steel | |
| US12440928B2 (en) | Welding wires with high impact toughness | |
| JPS60261690A (en) | Coated electrode for cr-mo low alloy steel | |
| JP2005254284A (en) | Gas shield arc welding method | |
| JPH0542390A (en) | Low hydrogen system coated arc welding rod for 9Cr steel welding | |
| JPH03197660A (en) | Method for hot dip galvanizing welded steel structure | |
| JP2004098108A (en) | Welding material, welding method and welded joint | |
| JPS6372498A (en) | Gas shield arc welding wire for galvanized steel sheets |