JP2001001181A - Wire for gas shielded arc welding - Google Patents
Wire for gas shielded arc weldingInfo
- Publication number
- JP2001001181A JP2001001181A JP2000110198A JP2000110198A JP2001001181A JP 2001001181 A JP2001001181 A JP 2001001181A JP 2000110198 A JP2000110198 A JP 2000110198A JP 2000110198 A JP2000110198 A JP 2000110198A JP 2001001181 A JP2001001181 A JP 2001001181A
- Authority
- JP
- Japan
- Prior art keywords
- toughness
- strength
- welding
- weld metal
- less
- 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
Landscapes
- Arc Welding In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ガスシールドアー
ク溶接用ワイヤに係り、とくに950MPa以上の引張強さを
有する超高張力鋼板のガスシールドアーク溶接、さらに
詳しくはＭＡＧ（マグ）溶接、に好適なワイヤに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire for gas shielded arc welding, and is particularly suitable for gas shielded arc welding of an ultra-high tensile strength steel sheet having a tensile strength of 950 MPa or more, and more particularly MAG (mag) welding. About the wires.
【０００２】[0002]
【従来の技術】高張力鋼の溶接には、被覆アーク溶接、
サブマージアーク溶接、マグ（ＭＡＧ）溶接、ティグ
（ＴＩＧ）溶接など各種の溶接方法が適用されている。
各種溶接方法のなかで、引張強さが950MPa以上の超高張
力鋼板を溶接する際には、低温割れの発生を防止する観
点から、溶接金属中の水素量を低減できるマグ溶接、テ
ィグ溶接が好適である。2. Description of the Related Art Covered arc welding, welding of high strength steel,
Various welding methods such as submerged arc welding, MAG (MAG) welding, and TIG (TIG) welding have been applied.
Among various welding methods, when welding ultra-high-strength steel sheets with a tensile strength of 950MPa or more, from the viewpoint of preventing the occurrence of low-temperature cracking, mag welding and TIG welding, which can reduce the amount of hydrogen in the weld metal, are used. It is suitable.
【０００３】また、ティグ溶接によれば、溶接金属中の
酸素量を極めて低くすることが可能であり、良好な靱性
を有する溶接金属を得ることができる。しかし、溶接施
工効率の面からはティグ溶接にくらべマグ溶接の方が優
れており、溶接施工コストの軽減という観点からは、マ
グ溶接の適用が要望されている。高張力鋼の溶接におい
ては、強度が高くなればなるほど溶接部に低温割れが発
生しやすくなり、また溶接部の靱性も低下する傾向とな
る。そのため、高張力鋼用溶接材料には、高い強度を有
し、かつ良好な耐低温割れ感受性と高い靱性を有するこ
とが要求されている。[0003] Further, according to TIG welding, the amount of oxygen in the weld metal can be extremely reduced, and a weld metal having good toughness can be obtained. However, MAG welding is superior to TIG welding in terms of welding work efficiency, and application of MAG welding is demanded from the viewpoint of reducing welding work costs. In the welding of high-tensile steel, the higher the strength, the easier it is for a low-temperature crack to occur in the weld, and the toughness of the weld tends to decrease. Therefore, a welding material for high-strength steel is required to have high strength, good low-temperature cracking resistance and high toughness.
【０００４】このようなことから、強度、靱性、耐低温
割れ性の向上を目的として、種々の高張力鋼用溶接材料
が開発されている。高張力鋼用マグ溶接材料では、Ｃ、
Si、Mn、Ni、Cr、Moを基本成分として、さらに、Ｖ、T
i、Nb、Ｎなどの合金元素を単独または複合して添加
し、所望の溶接部強度を確保しているのが一般的であ
る。これは、合金元素の多量添加は靱性を劣化させるた
め、基本成分の多量添加を避け、少量の添加で強度増加
が期待できる元素を添加して、高い強度と良好な靱性を
確保しようとするものである。[0004] For these reasons, various welding materials for high-strength steel have been developed for the purpose of improving strength, toughness, and low-temperature cracking resistance. For high strength steel mag welding materials, C,
Si, Mn, Ni, Cr, Mo as basic components, and V, T
Generally, alloy elements such as i, Nb, and N are added singly or in combination to secure a desired weld strength. This is because the addition of a large amount of alloying elements degrades toughness, so avoid adding a large amount of basic components, and add elements that can be expected to increase strength with a small amount of addition to secure high strength and good toughness. It is.
【０００５】例えば、特公昭63-32558号公報には、Tiと
Nbの複合添加による析出強化および組織強化を利用した
高強度と高靱性を有する超高張力鋼用マグ溶接材料が提
案されている。また、特開昭61-135499 号公報には、Ni
を3.51％以上添加し、さらにＶを添加して、Ｖによる析
出強化とNiによる靱性改善により、高強度と良好な靱性
を得る超高張力鋼用マグ溶接材料が提案されている。For example, Japanese Patent Publication No. Sho 63-32558 discloses that Ti and
A mag-welding material for ultra-high-strength steels having high strength and high toughness utilizing precipitation strengthening and structure strengthening by Nb composite addition has been proposed. JP-A-61-135499 discloses Ni
Is added by 3.51% or more, and further V is added, and a mag-welding material for ultra-high-strength steel that obtains high strength and good toughness by precipitation strengthening by V and improvement of toughness by Ni has been proposed.
【０００６】また、特開平7-276080号公報には、Ｃ、S
i、Mn、Ni、Cr、Moを基本組成として、TiとＶを複合添
加し、さらにＮを適量添加して、TiとＶによる析出強化
とＮによる靱性改善により、高強度と良好な靱性を得る
超高張力鋼用マグ溶接材料が提案されている。[0006] Japanese Patent Application Laid-Open No. 7-276080 discloses C, S
With the basic composition of i, Mn, Ni, Cr, and Mo, Ti and V are added in combination, and an appropriate amount of N is added. By strengthening precipitation with Ti and V and improving toughness with N, high strength and good toughness are achieved. A resulting mag welding material for ultra-high tensile steel has been proposed.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、特公昭
63-32558号公報、特開平7-276080号公報に記載された技
術におけるように、溶接材料（ワイヤ）にTiとNbあるい
はTiとＶ、Ｎを多量に添加すると、溶接金属を高強度化
できるが、溶接金属の靱性が劣化する場合があり、安定
して高強度と良好な靱性を有する溶接金属を得ることが
できないという問題があった。また、特開昭61-135499
号公報に記載された技術では、高価なNi、Ｖを多量に添
加する必要があり、製造コストが上昇し経済的に問題を
残していた。[Problems to be solved by the invention]
As in the techniques described in JP-A-63-32558 and JP-A-7-276080, when a large amount of Ti and Nb or Ti, V and N is added to a welding material (wire), the strength of the weld metal can be increased. However, there has been a problem that the toughness of the weld metal may deteriorate, and a weld metal having high strength and good toughness cannot be obtained stably. Also, JP-A-61-135499
In the technique described in Japanese Patent Application Laid-Open Publication No. H11-129, a large amount of expensive Ni and V needs to be added, and the production cost increases, leaving a problem economically.
【０００８】本発明は、上記した従来技術の問題を有利
に解決し、引張強さ：950MPa以上の超高張力鋼板をガス
シールドアーク溶接、なかでもマグ溶接により溶接継手
を作製する際に、高強度と高靱性を有する溶接金属を形
成することができる、超高張力鋼のガスシールドアーク
溶接に好適なガスシールドアーク溶接用ワイヤを提供す
ることを目的とする。The present invention advantageously solves the above-mentioned problems of the prior art, and is used for producing a high-strength steel plate having a tensile strength of 950 MPa or more by gas shielded arc welding, in particular, mag welding. An object of the present invention is to provide a gas shielded arc welding wire suitable for gas shielded arc welding of ultra-high strength steel, which can form a weld metal having strength and high toughness.
【０００９】[0009]
【課題を解決するための手段】本発明者らは、上記した
課題を達成するために、まず溶接用ワイヤの基本組成に
ついて鋭意検討した。その結果、超高張力鋼の溶接にお
いて、高靱性の溶接金属を得るためには、溶接用ワイヤ
の基本組成としてNiを2.90〜3.50％含有することが好ま
しいという知見を得た。超高張力鋼の溶接においては、
この範囲を外れると良好な靱性を有する溶接金属を得る
ことができない。Means for Solving the Problems In order to achieve the above-mentioned objects, the present inventors have first studied diligently about the basic composition of a welding wire. As a result, it has been found that, in order to obtain a high toughness weld metal in welding ultra-high tensile strength steel, it is preferable to contain 2.90 to 3.50% of Ni as a basic composition of a welding wire. In welding ultra-high strength steel,
Outside this range, a weld metal having good toughness cannot be obtained.
【００１０】さらに、本発明者らは、溶接用ワイヤの基
本組成としてNiを2.90〜3.50％含有させたうえで、溶接
金属の良好な靱性を確保しつつ、溶接金属の強度をさら
に増加させる手段について検討した。本発明者らは、強
度増加元素として、少量添加で強度の増加が得られるTi
に注目した。しかし、Tiのみの添加では、強度の増加は
得られるが、やはり強度の増加に伴い靱性の劣化が見ら
れた。そこで、本発明者らは、従来、靱性を劣化させる
と考えられ添加量が制限されていたAlに注目し、溶接金
属の靱性確保に有効なAl含有量が存在することを見いだ
した。溶接用ワイヤに、Tiと、さらに適正量のAlを添加
することにより、高強度でかつ高靱性の溶接金属を形成
できるという知見を得た。さらに加えて、溶接用ワイヤ
中の不純物としてＶ、Nb、Ｎ、Ｏ量を低減することによ
り、さらに靱性が向上することを見いだした。Further, the inventors of the present invention have disclosed a means for further increasing the strength of a weld metal while ensuring good toughness of the weld metal after containing 2.90 to 3.50% of Ni as a basic composition of the welding wire. Was considered. The present inventors have proposed, as a strength-increasing element, Ti
We paid attention to. However, when only Ti was added, the strength was increased, but the toughness was also deteriorated with the increase in strength. Therefore, the present inventors have paid attention to Al, which has been conventionally considered to deteriorate toughness and whose addition amount is limited, and found that there is an Al content effective for securing the toughness of the weld metal. It has been found that by adding Ti and an appropriate amount of Al to a welding wire, a high-strength and high-toughness weld metal can be formed. In addition, it has been found that toughness is further improved by reducing the amounts of V, Nb, N, and O as impurities in the welding wire.
【００１１】本発明は、上記した知見に基づき、さらに
検討し完成されたものである。すなわち、本発明は、質
量％で、Ｃ：0.020 〜0.060 ％、Si：0.20〜0.50％、M
n：1.50〜2.50％、Ni：2.90〜3.50％、Cr：0.7 〜1.5
％、Mo：0.30〜1.00％、Ti：0.010 〜0.050 ％、Al：0.
020 〜0.080 ％を含み、不純物としてのＰ、Ｓ、Ｎ、
Ｏ、Ｖ、Nbを、Ｐ：0.007 ％以下、Ｓ：0.007 ％以下、
Ｎ：0.007 ％以下、Ｏ：0.007 ％以下、Ｖ：0.005 ％以
下、Nb：0.003 ％以下に低減し、残部Feおよび不可避的
不純物からなることを特徴とする超高張力鋼ガスシール
ドアーク溶接用ワイヤである。The present invention has been further studied and completed based on the above findings. That is, in the present invention, C: 0.020 to 0.060%, Si: 0.20 to 0.50%, M
n: 1.50-2.50%, Ni: 2.90-3.50%, Cr: 0.7-1.5
%, Mo: 0.30 to 1.00%, Ti: 0.010 to 0.050%, Al: 0.
020-0.080%, P, S, N as impurities
O, V, Nb, P: 0.007% or less, S: 0.007% or less,
N: 0.007% or less, O: 0.007% or less, V: 0.005% or less, Nb: 0.003% or less, and the balance is composed of Fe and unavoidable impurities, and is a wire for an ultra-high strength steel gas shielded arc welding. It is.
【００１２】[0012]
【発明の実施の形態】本発明溶接用ワイヤの組成限定理
由について説明する。なお、質量％は、以下、単に％と
記す。 Ｃ：0.020 〜0.060 ％ Ｃは、溶接金属の強度を増加させる元素であるが、0.02
0 ％未満では所望の強度を得ることができない。一方、
0.060 ％を超える含有は、靱性が低下するとともに低温
割れ感受性が増大する。このため、Ｃは0.020 〜 0.060
％の範囲に限定した。DESCRIPTION OF THE PREFERRED EMBODIMENTS The reasons for limiting the composition of the welding wire of the present invention will be described. Hereinafter, the mass% is simply described as%. C: 0.020 to 0.060% C is an element that increases the strength of the weld metal.
If it is less than 0%, the desired strength cannot be obtained. on the other hand,
If the content exceeds 0.060%, the toughness decreases and the cold cracking sensitivity increases. Therefore, C is 0.020 to 0.060.
%.
【００１３】Si：0.20〜0.50％ Siは、溶接金属の脱酸のために不可欠の元素であり、ま
た溶接金属の強度を増加させる元素であり、本発明では
0.20％以上の含有を必要とする。Si含有量が0.20％未満
では、ピンホール、ブローホールが発生するうえ、靱性
が劣化する。一方、0.50％を超える含有は、靱性が劣化
する。このため、Siは0.20〜0.50％の範囲に限定した。Si: 0.20 to 0.50% Si is an indispensable element for deoxidizing the weld metal, and is an element that increases the strength of the weld metal.
Requires a content of 0.20% or more. If the Si content is less than 0.20%, pinholes and blowholes are generated, and toughness is deteriorated. On the other hand, if the content exceeds 0.50%, the toughness deteriorates. For this reason, Si was limited to the range of 0.20 to 0.50%.
【００１４】Mn：1.50〜2.50％ Mnは、溶接金属の強度および靱性を増加させる元素であ
り、本発明では1.50％以上の含有を必要とする。しか
し、2.50％を超える含有は、靱性が低下するとともに低
温割れ感受性が増大する。このため、Mnは1.50〜2.50％
の範囲に限定した。Mn: 1.50-2.50% Mn is an element that increases the strength and toughness of the weld metal, and the present invention requires a content of 1.50% or more. However, if the content exceeds 2.50%, the toughness decreases and the cold cracking sensitivity increases. Therefore, Mn is 1.50-2.50%
Limited to the range.
【００１５】Ni：2.90〜3.50％ Niは、溶接金属の靱性を向上させる元素であり、本発明
では2.90％以上の含有を必要とする。Ni含有量が2.90％
未満では、所望の靱性を確保できない。一方、Niを3.50
％超えて含有すると、本発明におけるような950MPa以上
の引張強さを有する溶接金属では靱性はかえって低下す
る。このため、Niは2.90〜3.50％の範囲に限定した。Ni: 2.90 to 3.50% Ni is an element that improves the toughness of the weld metal. In the present invention, the content of Ni is required to be 2.90% or more. 2.90% Ni content
If it is less than 30, desired toughness cannot be secured. On the other hand, Ni
When the content exceeds 10%, the toughness is rather lowered in a weld metal having a tensile strength of 950 MPa or more as in the present invention. For this reason, Ni was limited to the range of 2.90 to 3.50%.
【００１６】Cr：0.7 〜1.5 ％ Crは、溶接金属の強度を増加させる有効な元素であり、
本発明では0.7 ％以上の含有を必要とする。一方、1.5
％を超える含有は、靱性が低下するとともに低温割れ感
受性が増大する。このため、Crは0.7 〜1.5 ％の範囲に
限定した。 Mo：0.30〜1.00％ Moは、溶接金属の強度を増加させる有効な元素であり、
本発明では0.30％以上の含有を必要とする。一方、1.00
％を超える含有は、靱性が低下するとともに低温割れ感
受性が増大する。このため、Moは0.30〜1.00％の範囲に
限定した。Cr: 0.7-1.5% Cr is an effective element for increasing the strength of the weld metal.
In the present invention, the content is required to be 0.7% or more. On the other hand, 1.5
%, The toughness decreases and the cold cracking sensitivity increases. For this reason, Cr is limited to the range of 0.7 to 1.5%. Mo: 0.30-1.00% Mo is an effective element to increase the strength of the weld metal,
In the present invention, the content is required to be 0.30% or more. On the other hand, 1.00
%, The toughness decreases and the cold cracking sensitivity increases. For this reason, Mo was limited to the range of 0.30 to 1.00%.
【００１７】Ti：0.010 〜0.050 ％ Tiは、析出強化により溶接金属の強度を増加させる元素
であり、本発明では0.010 ％以上の含有を必要とする。
一方、0.050 ％を超えて含有すると、強度は増加するが
靱性が劣化する。このため、Tiは0.010 〜0.050 ％の範
囲に限定した。 Al：0.020 〜0.080 ％ Alは、溶接金属の脱酸剤として作用するとともに、Tiと
複合添加することにより強度が増加した溶接金属の靱性
を、所望のレベルに確保する作用を有している。このよ
うな作用は0.020 ％以上の含有で認められるが、0.080
％を超える含有は靱性を著しく劣化させる。このため、
Alは0.020 〜0.080 ％の範囲に限定した。Ti: 0.010 to 0.050% Ti is an element that increases the strength of the weld metal by precipitation strengthening. In the present invention, the content of Ti is required to be 0.010% or more.
On the other hand, if the content exceeds 0.050%, the strength increases but the toughness deteriorates. For this reason, Ti is limited to the range of 0.010 to 0.050%. Al: 0.020 to 0.080% Al acts as a deoxidizing agent for the weld metal, and also has an effect of ensuring the desired level of toughness of the weld metal whose strength has been increased by adding it in combination with Ti. Such an effect is observed at a content of 0.020% or more, but 0.080%
%, Significantly deteriorates toughness. For this reason,
Al was limited to the range of 0.020 to 0.080%.
【００１８】また、本発明では、不純物としてのＰ、
Ｓ、Ｎ、Ｏ、Ｖ、Nbを下記のように低減する。 Ｐ：0.007 ％以下 Ｐは、溶接金属の靱性を低下させる元素であり、本発明
ではできるだけ低減する。Ｐ含有量が0.007 ％を超える
と、靱性の劣化が著しくなる。このため、Ｐは0.007 ％
以下に限定する。Further, in the present invention, P as an impurity,
S, N, O, V, and Nb are reduced as follows. P: 0.007% or less P is an element that lowers the toughness of the weld metal, and is reduced as much as possible in the present invention. If the P content exceeds 0.007%, the toughness deteriorates significantly. Therefore, P is 0.007%
Limited to the following.
【００１９】Ｓ：0.007 ％以下 Ｓは、溶接金属の靱性を低下させ、また高温割れの原因
にもなる元素であり、できるだけ低減する。Ｓ含有量が
0.007 ％を超えると、靱性の劣化が著しくなる。このた
め、Ｓは0.007 ％以下に限定する。 Ｎ：0.007 ％以下 Ｎは、少量の添加で溶接金属の強度を増加させる元素で
あるが、同時に靱性を劣化させる。このため、Ｎは0.00
7 ％以下に限定する。S: 0.007% or less S is an element that lowers the toughness of the weld metal and also causes hot cracking, and is reduced as much as possible. S content
If it exceeds 0.007%, the toughness is significantly deteriorated. Therefore, S is limited to 0.007% or less. N: 0.007% or less N is an element that increases the strength of the weld metal when added in a small amount, but also degrades the toughness. Therefore, N is 0.00
Limited to 7% or less.
【００２０】Ｖ：0.005 ％以下 Ｖは、少量の添加で溶接金属の強度を増加させる元素で
あるが、同時に靱性を劣化させる。このため、Ｖは0.00
5 ％以下に限定する。 Nb：0.003 ％以下 Nbは、少量の添加で溶接金属の強度を増加させる元素で
あるが、同時に靱性を劣化させる。このため、Nbは0.00
3 ％以下に限定する。V: not more than 0.005% V is an element that increases the strength of the weld metal when added in a small amount, but also degrades the toughness. Therefore, V is 0.00
Limit to 5% or less. Nb: 0.003% or less Nb is an element that increases the strength of the weld metal when added in a small amount, but also deteriorates toughness. Therefore, Nb is 0.00
Limit to 3% or less.
【００２１】Ｏ：0.007 ％以下 Ｏは、高強度の溶接金属では靱性を劣化させる元素であ
り、できるだけ低減する。Ｏ含有量が0.007 ％を超える
と、溶接金属の靱性が著しく劣化する。このため、Ｏは
0.007 ％以下に限定する。本発明の溶接用ワイヤの製造
方法について説明する。O: 0.007% or less O is an element that deteriorates toughness in a high-strength weld metal, and is reduced as much as possible. If the O content exceeds 0.007%, the toughness of the weld metal is significantly deteriorated. For this reason, O
Limited to 0.007% or less. The method for manufacturing the welding wire of the present invention will be described.
【００２２】上記した組成の溶鋼を通常公知の溶製方法
で溶製し、造塊法あるいは連続鋳造法により鋳造し、圧
延素材とする。これら圧延素材を、熱間圧延、冷間圧延
により所定の寸法のワイヤとする。熱間圧延条件、冷間
圧延条件についてはとくに限定する必要はない。上記し
た組成で所定寸法のワイヤは、さらに防錆のため表面に
Cuめっきを施すのが好ましい。Cuめっきのめっき厚は0.
2 〜1.0 μm とするのが好ましい。0.2μm 未満では、
防錆効果が少なく、一方1.0 μm を超えるとワイヤ送給
性が劣化する。The molten steel having the above-described composition is smelted by a generally known smelting method and cast by an ingot casting method or a continuous casting method to obtain a rolled material. These rolled materials are formed into wires having predetermined dimensions by hot rolling and cold rolling. Hot rolling conditions and cold rolling conditions do not need to be particularly limited. A wire of the specified composition with the above composition is applied to the surface for further rust prevention.
It is preferable to perform Cu plating. Cu plating thickness is 0.
It is preferably between 2 and 1.0 μm. If less than 0.2 μm,
The rust prevention effect is low, while if it exceeds 1.0 μm, the wire feedability deteriorates.
【００２３】本発明の溶接用ワイヤは、超高張力鋼板の
ガスシールドアーク溶接用を目的としているが、マグ溶
接用としても利用できることはいうまでもない。シール
ドガスとしては、Arガスを主体としてCO2 などを混合し
た混合ガスを用いるのが好ましく、作業性を考慮する場
合はさらにHeを混合した、Ar−He−CO2 からなる混合ガ
スを用いるのが好ましい。Although the welding wire of the present invention is intended for gas shielded arc welding of ultra-high strength steel sheets, it goes without saying that it can also be used for mag welding. As the shielding gas, it is preferable to use a mixed gas in which Ar gas is mainly mixed with CO 2 or the like, and when considering workability, a mixed gas of Ar-He-CO 2 further mixed with He is used. Is preferred.
【００２４】[0024]
【実施例】表１に示す組成の鋼板（板厚50mm）に熱処理
（焼入れ−焼戻し）を施し、引張強さ950 MPa 以上の超
高張力鋼板とした。この鋼板を、図１に示す開先形状に
加工したのち、表２に示す組成の溶接用ワイヤ（1.2mm
φ）を用いて、多層溶接を行い、溶接継手を作製した。
溶接法は、Ar−CO2 混合ガスおよびAr−He−CO2 混合ガ
スをシールドガスとするマグ溶接法とした。溶接条件を
表３に示す。EXAMPLE Heat treatment (quenching-tempering) was performed on a steel sheet (sheet thickness 50 mm) having the composition shown in Table 1 to obtain an ultra-high tensile steel sheet having a tensile strength of 950 MPa or more. After processing this steel sheet into the groove shape shown in FIG. 1, a welding wire (1.2 mm
Using φ), multi-layer welding was performed to produce a welded joint.
The welding method was a mag welding method using an Ar—CO 2 mixed gas and an Ar—He—CO 2 mixed gas as shielding gases. Table 3 shows the welding conditions.
【００２５】[0025]
【表１】 [Table 1]
【００２６】[0026]
【表２】 [Table 2]
【００２７】[0027]
【表３】 [Table 3]
【００２８】[0028]
【表４】 [Table 4]
【００２９】これらの溶接継手から試験片を採取し、引
張試験、衝撃試験を実施し、引張特性、衝撃特性を調査
した。 （１）引張試験 溶接継手部から、JIS Z 3121に規定されるJIS １号引張
試験片（全厚の溶接継手引張試験片）を採取し、これら
溶接継手部引張試験片による引張試験を実施し、引張強
度を求めた。 （２）衝撃試験 溶接継手部の溶接金属中央部で、板厚1/4 の位置から、
JIS Z 3111に規定するシャルピー衝撃試験片（JIS ４号
衝撃試験片）を採取し、-20 ℃におけるシャルピー衝撃
試験の吸収エネルギー（vE-20 ）を求めた。Test specimens were taken from these welded joints, and a tensile test and an impact test were carried out to investigate tensile properties and impact properties. (1) Tensile test A JIS No. 1 tensile test specimen (full thickness welded joint tensile test specimen) specified in JIS Z 3121 was sampled from the welded joint, and a tensile test was performed using these welded joint tensile test specimens. And tensile strength. (2) Impact test At the center of the weld metal at the weld joint, from the position of 1/4 of the plate thickness,
A Charpy impact test piece (JIS No. 4 impact test piece) specified in JIS Z 3111 was sampled, and the absorption energy (vE -20 ) of the Charpy impact test at -20 ° C was determined.
【００３０】これらの結果を表４に示す。なお、引張特
性の評価は、950MPa以上の継手引張強度を示したものを
○、それ以外を×とした。靱性の評価は、-20 ℃におけ
るシャルピー吸収エネルギー（vE-20 ）が95Ｊ以上の靱
性を示したものを○、それ以外を×とした。Table 4 shows the results. In the evaluation of the tensile properties, those showing joint tensile strength of 950 MPa or more were evaluated as ○, and the others were evaluated as ×. The toughness was evaluated as ○ when the Charpy absorbed energy (vE -20 ) at −20 ° C. was 95 J or more, and evaluated as × when the other was not.
【００３１】[0031]
【表５】 [Table 5]
【００３２】[0032]
【表６】 [Table 6]
【００３３】[0033]
【表７】 [Table 7]
【００３４】表４から、本発明例は、いずれも継手部引
張強度が950MPa以上を示し、溶接金属のvE-20 が95Ｊ以
上を示し、強度、靱性とも良好である。これに対し、本
発明の範囲を外れる比較例は、継手部引張強度あるいは
vE-20 のいずれかが上記値を満足せず、強度、靱性のい
ずれかが低下している。From Table 4, it can be seen that all of the examples of the present invention have a joint tensile strength of 950 MPa or more, a weld metal vE- 20 of 95 J or more, and have good strength and toughness. On the other hand, the comparative examples out of the range of the present invention have a joint tensile strength or
Any of vE- 20 does not satisfy the above values, and either strength or toughness is reduced.
【００３５】[0035]
【発明の効果】以上のように、本発明によれば、溶接金
属の靱性劣化もなく、所望の継手部引張強さを有する、
引張強さ：950MPa以上の超高張力鋼板のガスシールド溶
接継手を容易に作製することができ、産業上格段の効果
を奏する。As described above, according to the present invention, the desired joint tensile strength can be obtained without deterioration in the toughness of the weld metal.
Tensile strength: Gas shield welded joints of ultra-high tensile strength steel plate of 950MPa or more can be easily manufactured, and it has a remarkable industrial effect.
【図１】溶接継手部の開先形状を示す説明図である。FIG. 1 is an explanatory view showing a groove shape of a weld joint part.
Claims (1)
％ を含み、不純物としてのＰ、Ｓ、Ｎ、Ｏ、Ｖ、Nbを、 Ｐ：0.007 ％以下、 Ｓ：0.007 ％以下、 Ｎ：0.007 ％以下、 Ｏ：0.007 ％以下、 Ｖ：0.005 ％以下、 Nb：0.003 ％以下 に低減し、残部Feおよび不可避的不純物からなることを
特徴とする超高張力鋼ガスシールドアーク溶接用ワイ
ヤ。1. In mass%, C: 0.020 to 0.060%, Si: 0.20 to 0.50%, Mn: 1.50 to 2.50%, Ni: 2.90 to 3.50%, Cr: 0.7 to 1.5%, Mo: 0.30 to 1.00% , Ti: 0.010 to 0.050%, Al: 0.020 to 0.080
P: 0.007% or less, S: 0.007% or less, N: 0.007% or less, O: 0.007% or less, V: 0.005% or less, containing P, S, N, O, V, and Nb as impurities. Nb: An ultra-high tensile strength steel gas shielded arc welding wire characterized by being reduced to 0.003% or less, with the balance being Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000110198A JP3894703B2 (en) | 1999-04-15 | 2000-04-12 | Gas shielded arc welding wire |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10763899 | 1999-04-15 | ||
| JP11-107638 | 1999-04-15 | ||
| JP2000110198A JP3894703B2 (en) | 1999-04-15 | 2000-04-12 | Gas shielded arc welding wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001001181A true JP2001001181A (en) | 2001-01-09 |
| JP3894703B2 JP3894703B2 (en) | 2007-03-22 |
Family
ID=26447665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000110198A Expired - Fee Related JP3894703B2 (en) | 1999-04-15 | 2000-04-12 | Gas shielded arc welding wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3894703B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007260697A (en) * | 2006-03-27 | 2007-10-11 | Nippon Steel & Sumikin Welding Co Ltd | Solid wire for welding high tensile strength steel and gas-shielded arc welding method for high tensile strength steel |
| KR20150105925A (en) | 2014-03-10 | 2015-09-18 | 가부시키가이샤 고베 세이코쇼 | Solid wire for gas metal arc welding |
| CN105234587A (en) * | 2015-11-20 | 2016-01-13 | 山东钢铁股份有限公司 | Gas shielded welding no-plated-copper solid welding wire for 1500 MPa-grade ultrahigh-strength steel |
| US9259806B2 (en) | 2012-05-08 | 2016-02-16 | Nippon Steel & Sumitomo Metal Corporation | Flux-cored wire for welding ultrahigh tensile strength steel |
| CN108705223A (en) * | 2018-05-16 | 2018-10-26 | 武汉钢铁有限公司 | A kind of tensile strength is 810MPa grades of high-ductility corrosion Lincoln weld welding wires |
| CN110625289A (en) * | 2019-08-07 | 2019-12-31 | 中国第一重型机械集团大连加氢反应器制造有限公司 | Tungsten electrode argon arc welding wire for welding Mn-Mo-Ni steel of nuclear island main equipment |
| CN112792479A (en) * | 2021-04-07 | 2021-05-14 | 四川西冶新材料股份有限公司 | High-strength high-toughness gas shielded welding solid welding wire for X90 pipeline steel and preparation method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084752B (en) * | 2013-01-23 | 2016-03-30 | 宝山钢铁股份有限公司 | A kind of X100 pipe line steel high-strength and high ductility welding wire for submerged-arc welding |
| WO2020067752A1 (en) * | 2018-09-28 | 2020-04-02 | 주식회사 포스코 | High-strength cold rolled steel sheet having high hole expansion ratio, high-strength hot-dip galvanized steel sheet, and manufacturing methods therefor |
-
2000
- 2000-04-12 JP JP2000110198A patent/JP3894703B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007260697A (en) * | 2006-03-27 | 2007-10-11 | Nippon Steel & Sumikin Welding Co Ltd | Solid wire for welding high tensile strength steel and gas-shielded arc welding method for high tensile strength steel |
| US9259806B2 (en) | 2012-05-08 | 2016-02-16 | Nippon Steel & Sumitomo Metal Corporation | Flux-cored wire for welding ultrahigh tensile strength steel |
| KR20150105925A (en) | 2014-03-10 | 2015-09-18 | 가부시키가이샤 고베 세이코쇼 | Solid wire for gas metal arc welding |
| CN105234587A (en) * | 2015-11-20 | 2016-01-13 | 山东钢铁股份有限公司 | Gas shielded welding no-plated-copper solid welding wire for 1500 MPa-grade ultrahigh-strength steel |
| CN108705223A (en) * | 2018-05-16 | 2018-10-26 | 武汉钢铁有限公司 | A kind of tensile strength is 810MPa grades of high-ductility corrosion Lincoln weld welding wires |
| CN110625289A (en) * | 2019-08-07 | 2019-12-31 | 中国第一重型机械集团大连加氢反应器制造有限公司 | Tungsten electrode argon arc welding wire for welding Mn-Mo-Ni steel of nuclear island main equipment |
| CN112792479A (en) * | 2021-04-07 | 2021-05-14 | 四川西冶新材料股份有限公司 | High-strength high-toughness gas shielded welding solid welding wire for X90 pipeline steel and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3894703B2 (en) | 2007-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3427387B2 (en) | High strength welded steel structure with excellent corrosion resistance | |
| JP2006289395A (en) | Solid wire for gas shielded arc welding | |
| US9492894B2 (en) | Flux-cored arc welding wire for providing superior toughness and weldability to a welded joint at a low temperature, and welded joint using same | |
| JP7005396B2 (en) | Ferrite-austenite two-phase stainless steel sheet for automobile fasteners | |
| JP2001001148A (en) | GAS SHIELD ARC WELDING OF THICK HIGH TENSILE STRENGTH STEEL PLATE OF AT LEAST 900 MPa CLASS | |
| JP3850764B2 (en) | Welding wire for high Cr ferritic heat resistant steel | |
| JP3329261B2 (en) | Welding materials and welded joints for high temperature high strength steel | |
| JP3894703B2 (en) | Gas shielded arc welding wire | |
| JP4625415B2 (en) | Solid wire for gas shielded arc welding | |
| JP2857318B2 (en) | Welding wire for high tensile steel | |
| JP3440710B2 (en) | H-section steel excellent in toughness of fillet portion and method for producing the same | |
| JP6961518B2 (en) | Ferrite / austenite two-phase stainless steel plate for tank band and tank band and spot welding method using this | |
| JP3572152B2 (en) | Low Cr ferritic cast steel with excellent high temperature strength and weldability | |
| JPH09225680A (en) | Welding wire for ferritic stainless steel | |
| JP4522042B2 (en) | Steel with excellent high-pass temperature weldability and its welded joint | |
| JP4192576B2 (en) | Martensitic stainless steel sheet | |
| JP3481547B2 (en) | Solid wire for gas shielded arc welding | |
| JP4040824B2 (en) | Weld metal | |
| JP3194207B2 (en) | Covered arc welding rod for high Cr ferritic heat resistant steel | |
| JPH0596397A (en) | Steel wire for high electric current mig welding | |
| JPS6261663B2 (en) | ||
| JP3933020B2 (en) | Stainless steel with excellent fatigue characteristics and toughness of fillet welded joints when forming fillet welded joints | |
| EP4365326A1 (en) | Submerged arc welding method | |
| JP2898447B2 (en) | Steel plates for pressure vessels with excellent electron beam welding characteristics | |
| JP3598600B2 (en) | Weld metal having high strength and toughness and method of forming the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20031226 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040323 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20061212 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| LAPS | Cancellation because of no payment of annual fees |