JP3360235B2 - Gas shielded arc welded steel wire for high tensile steel - Google Patents
Gas shielded arc welded steel wire for high tensile steelInfo
- Publication number
- JP3360235B2 JP3360235B2 JP32655294A JP32655294A JP3360235B2 JP 3360235 B2 JP3360235 B2 JP 3360235B2 JP 32655294 A JP32655294 A JP 32655294A JP 32655294 A JP32655294 A JP 32655294A JP 3360235 B2 JP3360235 B2 JP 3360235B2
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- strength
- toughness
- steel
- weld metal
- wire
- Prior art date
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、Ａｒ−ＣＯ2 混合ガス
をシールドガスとして使用する高張力鋼用鋼ワイヤに関
し、詳しくは１００ｋｇｆ／ｍｍ2 級鋼のガスシールド
アーク溶接に使用し、特に比較的薄板の溶接において優
れた溶接金属を得るための高張力鋼用鋼ワイヤに係わる
ものである。BACKGROUND OF THE INVENTION This invention is an Ar-CO 2 mixed gas relates high-tensile steel for steel wire used as a shielding gas, and more particularly used in gas shielded arc welding of 100 kgf / mm 2 class steel, particularly compared The present invention relates to a high-strength steel wire for obtaining an excellent weld metal in welding a thin sheet.
【０００２】[0002]
【従来の技術】近年、鋼構造物の大型化に伴い、構造物
の軽量化を図るために高張力鋼が広く使用されるように
なってきている。また、鋼材の技術進歩もめざましく、
高張力鋼の溶接性は著しく改善され、特に高張力鋼の溶
接において問題とされていた低温割れ感受性は著しく改
善されている。このため、８０〜１００ｋｇｆ／ｍｍ2
級高張力鋼の需要はますます高まっている。2. Description of the Related Art In recent years, with the enlargement of steel structures, high-strength steels have been widely used to reduce the weight of the structures. In addition, technical progress of steel material is remarkable,
The weldability of high strength steel is significantly improved, and the cold cracking susceptibility, which has been a problem particularly in welding high strength steel, is significantly improved. For this reason, 80-100 kgf / mm 2
Demand for high-grade high-strength steel is increasing.
【０００３】これら８０ｋｇｆ／ｍｍ2 級以上の高張力
鋼を使用する構造物の製造にあたっては、水素量が少な
く、耐割れ性に優れ、また高能率化に適するガスシール
ドアーク溶接が使用される。従来、このような用途に
は、特開昭５７−１５９２９３号公報に開示されるよう
に、Ｎｉ、Ｃｒ、Ｍｏなどを適量添加した高張力鋼用鋼
ワイヤ（以下ワイヤ）が使用されていた。しかし、これ
らワイヤは、主に厚板の多層溶接において、強度、靱性
を確保することを対象としたものであった。[0003] In the production of structures using these 80 kgf / mm 2 or higher grade high tensile steel, small amount of hydrogen, is excellent in crack resistance, also gas-shielded arc welding suitable for high efficiency is used. Conventionally, for such applications, as disclosed in Japanese Patent Application Laid-Open No. 57-159293, a steel wire for high-tensile steel (hereinafter, wire) to which an appropriate amount of Ni, Cr, Mo, or the like has been added has been used. However, these wires are intended to secure strength and toughness mainly in multilayer welding of thick plates.
【０００４】これら厚板に適したワイヤを、単層または
２、３層で溶接する薄板に適用した場合、十分な溶接金
属の強度、靱性を得ることができず、薄板用ワイヤの要
望が高まっている。厚板溶接における溶接部の強度を母
材強度と同等以上に改善するには、特開昭５２−１２９
６４６号公報に開示されるように、Ｎｉ、Ｃｒ、Ｍｏな
どの合金成分を多量に添加する方法が広く採用されてい
る。When a wire suitable for such a thick plate is applied to a thin plate to be welded with a single layer or two or three layers, sufficient strength and toughness of a weld metal cannot be obtained, and the demand for a wire for a thin plate has increased. ing. In order to improve the strength of the welded portion in thick plate welding to be equal to or higher than the base metal strength, Japanese Patent Laid-Open No.
As disclosed in Japanese Patent Publication No. 646, a method of adding a large amount of an alloy component such as Ni, Cr, and Mo has been widely adopted.
【０００５】しかし、このように成分調整を行ったワイ
ヤを用いて薄板の溶接継手を作成すると、溶接金属の冷
却速度が遅いために焼入れ性が不足し、溶接金属の強度
が低下して母材の強度以下となる。また、薄板溶接で
は、多層溶接によって得られる後続の熱サイクル靱性の
向上が期待できないため、靱性の低下が生じる等の問題
があった。[0005] However, when a thin-plate welded joint is made using the wires whose components have been adjusted in this way, the cooling rate of the weld metal is slow, so that the hardenability is insufficient, the strength of the weld metal is reduced, and the base metal is reduced. Or less. Further, in thin plate welding, there is a problem that the toughness is reduced because the subsequent improvement of the thermal cycle toughness obtained by multi-layer welding cannot be expected.
【０００６】８０〜１００ｋｇｆ／ｍｍ2 程度の高張力
鋼のワイヤとしては、特公昭６０−５７９５３号公報
に、高張力鋼のガスシールドアーク溶接用鋼ワイヤにつ
いて、従来の方法ではミクロ組織の微細化は不十分であ
るとして、ＡｌおよびＴｉの酸可溶成分と酸不溶成分と
に分けて各々規定することにより、ミクロ組織の微細化
を図り、靱性を改善するという技術が開示されている。
しかし、いずれも板厚２５ｍｍ以上の厚板の多層溶接を
対象とした技術であり、薄板の少層溶接については何等
の改善を見ていない。Japanese Patent Publication No. 60-57953 discloses a high-strength steel wire having a strength of about 80 to 100 kgf / mm 2, which is disclosed in Japanese Patent Publication No. 60-57953. Is disclosed as a technique in which the microstructure is refined and the toughness is improved by separately defining the acid-soluble component and the acid-insoluble component of Al and Ti.
However, all of these techniques are directed to multi-layer welding of thick plates having a plate thickness of 25 mm or more, and no improvement has been seen in thin-layer welding of thin plates.
【０００７】さらに、特公昭６３−３２５５８号公報に
おいて、１００ｋｇｆ／ｍｍ2 以上の高張力鋼用不活性
ガスシールドアーク溶接ワイヤについて、主合金成分範
囲を特定し、さらに０．０３％以下のＮｂを添加するこ
とにより結晶粒を微細化して靱性を改善するという技術
が開示されているが、厚板の多層溶接を対象とした発明
である。[0007] Further, in Japanese Patent Publication No. 63-32558, a range of a main alloy component is specified for an inert gas shielded arc welding wire for high tensile strength steel of 100 kgf / mm 2 or more, and Nb of 0.03% or less is further specified. There is disclosed a technique of improving the toughness by refining crystal grains by adding, but this invention is directed to multilayer welding of thick plates.
【０００８】このように、高張力鋼の薄板の溶接を対象
とした溶接ワイヤに関しては、従来技術においては、何
等の改善も見ていない。[0008] As described above, the prior art has not seen any improvement in the welding wire for welding thin sheets of high-tensile steel.
【０００９】[0009]
【発明が解決しようとする課題】本発明は、上記問題点
を解決するためになされたものであり、１００ｋｇｆ／
ｍｍ2 級高張力鋼の５〜１５ｍｍ程度の薄板の少層溶接
においても適正な強度と靱性を有する溶接金属が得られ
る高張力鋼用ガスシールドアーク溶接鋼ワイヤを提供す
ることを目的とするものである。DISCLOSURE OF THE INVENTION The present invention has been made to solve the above problems, and has been made to solve the above problem.
It is an object of the present invention to provide a gas-shielded arc welding steel wire for high-strength steel capable of obtaining a weld metal having appropriate strength and toughness even in small-layer welding of a thin plate of about 5 to 15 mm of 2 mm high-grade steel. It is.
【００１０】[0010]
【課題を解決するための手段】すなわち、本発明の要旨
とするところは、ワイヤ全重量に対して重量％で、Ｃ：
０．０５〜０．１５％、Ｓｉ：０．３０〜１．０％、Ｍ
ｎ：１．７０〜３．０％、Ｐ：０．０１０％以下、Ｓ：
０．０１０％以下、Ｎｉ：２．３０〜３．５％、Ｃｒ：
０．９０〜１．５０％、Ｍｏ：０．３０〜１．００％、
Ａｌ：０．００５〜０．０１０％、Ｔｉ：０．００５〜
０．１０％、Ｚｒ：０．００５〜０．０１０％、Ｎｂ：
０．００１〜０．１０％、Ｖ：０．００５〜０．１０
％、Ｎ：０．０００５〜０．０１０％、Ｏ：０．００５
０％以下を含有し、かつ（Ａｌ＋Ｔｉ＋Ｚｒ＋Ｎｂ＋
Ｖ）／（Ｃ＋Ｎ）が０．２〜０．４の範囲にあり、残部
が実質的にＦｅよりなることを特徴とする高張力鋼用ガ
スシールドアーク溶接鋼ワイヤにある。That is, the gist of the present invention is that C:
0.05-0.15%, Si: 0.30-1.0%, M
n: 1.70 to 3.0%, P: 0.010% or less, S:
0.010% or less, Ni: 2.30 to 3.5%, Cr:
0.90 to 1.50%, Mo: 0.30 to 1.00%,
Al: 0.005 to 0.010%, Ti: 0.005 to
0.10%, Zr: 0.005 to 0.010%, Nb:
0.001 to 0.10%, V: 0.005 to 0.10
%, N: 0.0005 to 0.010%, O: 0.005
0% or less, and (Al + Ti + Zr + Nb +
V) / (C + N) is in the range of 0.2 to 0.4, and the balance is substantially made of Fe.
【００１１】[0011]
【作用】本発明者らは上記問題点を解決するため、薄板
の少層溶接の強度と靱性に有効な合金成分について種々
検討を行ったところ、厚板の多層溶接の強度増加に有効
とされているＮｉ、Ｃｒ、Ｍｏは、薄板の少層溶接にお
いても、溶接金属の引張強さに対しては有効であるが、
溶接金属の降伏強度および靱性の確保には不十分である
ことが判った。そこで、降伏強度を増加させるために、
Ｎｂ、Ｖ、Ａｌ、Ｔｉ等の炭窒化物生成元素に着目し、
その効果を検討した結果、Ｎｉ、Ｃｒ、Ｍｏ等の添加で
引張強度を確保しつつ、これらの元素を適量添加するこ
とにより、薄板の少層溶接においても十分な降伏強度と
靱性が得られることを見出した。In order to solve the above-mentioned problems, the present inventors have conducted various studies on alloy components effective for the strength and toughness of thin-layer, low-layer welding, and found that they are effective for increasing the strength of multilayer welding of thick plates. Ni, Cr, and Mo are effective for the tensile strength of the weld metal even in thin-layer welding of thin plates,
It was found that it was insufficient to secure the yield strength and toughness of the weld metal. Therefore, in order to increase the yield strength,
Focusing on carbonitride forming elements such as Nb, V, Al, Ti, etc.,
As a result of examining the effect, it is found that sufficient yield strength and toughness can be obtained even in small-layer welding of thin plates by adding appropriate amounts of these elements while securing tensile strength by adding Ni, Cr, Mo, etc. Was found.
【００１２】表１に示す成分系のワイヤ径１．２ｍｍφ
の鋼ワイヤを用いて、表２の溶接条件および図１の開先
形状により溶接した１００ｋｇｆ／ｍｍ2 級高張力鋼溶
接金属の強度と靱性を検討した結果を表３に示す。衝撃
試験は−２０℃の吸収エネルギーが７０Ｊ以上を良好と
判定し、伸びについては１５％以上を良好と判定する目
安とした。また、引張強さは９８０Ｎ／ｍｍ2 以上を、
０．２％耐力は７８０Ｎ／ｍｍ2 以上を目標とした。The wire diameter of the component system shown in Table 1 is 1.2 mmφ.
Table 3 shows the results of examining the strength and toughness of a 100 kgf / mm class 2 high-strength steel weld metal welded by using the steel wire according to the welding conditions shown in Table 2 and the groove shape shown in FIG. In the impact test, an absorption energy at −20 ° C. of 70 J or more was judged to be good, and an elongation of 15% or more was used as a standard for judging good. In addition, the tensile strength is 980 N / mm 2 or more,
The 0.2% proof stress aimed at 780 N / mm 2 or more.
【００１３】[0013]
【表１】 [Table 1]
【００１４】[0014]
【表２】 [Table 2]
【００１５】[0015]
【表３】 [Table 3]
【００１６】このように、微量のＡｌ、Ｔｉ、Ｚｒ、Ｎ
ｂ、Ｖを添加し、さらにＡｌ＋Ｔｉ＋Ｚｒ＋Ｎｂ＋Ｖと
Ｃ＋Ｎとの比を０．２〜４．０の範囲にすることによっ
て、強度、靱性ともに改善された薄板の溶接金属が得ら
れる。本発明では、Ａｌ、Ｔｉ、Ｚｒ、Ｎｂ、Ｖ量が各
々の限定範囲内にあっても、Ｃ＋Ｎに対して０．２倍未
満では良好な強度、靱性が得られず、また４．０倍を超
えると靱性が著しく損なわれるため、適正範囲として
（Ａｌ＋Ｔｉ＋Ｚｒ＋Ｎｂ＋Ｖ）／（Ｃ＋Ｎ）を０．２
〜４．０と定めた。Thus, trace amounts of Al, Ti, Zr, N
By adding b and V and setting the ratio of Al + Ti + Zr + Nb + V to C + N in the range of 0.2 to 4.0, a thin plate weld metal with improved strength and toughness can be obtained. In the present invention, even if the amounts of Al, Ti, Zr, Nb, and V are within the respective limited ranges, good strength and toughness cannot be obtained if the amount is less than 0.2 times that of C + N, and 4.0 times. If it exceeds 300, the toughness is significantly impaired, so that (Al + Ti + Zr + Nb + V) / (C + N) is 0.2 as an appropriate range.
４4.0.
【００１７】以下に、本発明の成分限定理由を作用とと
もに詳細に説明する。 Ｃ：０．０５〜０．１５％ Ｃは溶接金属の強度確保の上で必須不可欠の成分である
が、０．０５％未満では高張力鋼溶接金属としては強度
が不足する。また、０．１５％を超えると割れ感受性が
著しく高くなるので、範囲を０．０５〜０．１５％とし
た。Hereinafter, the reasons for limiting the components of the present invention will be described in detail together with the action. C: 0.05 to 0.15% C is an indispensable component for securing the strength of the weld metal, but if it is less than 0.05%, the strength is insufficient as a high tensile strength steel weld metal. On the other hand, if it exceeds 0.15%, the cracking sensitivity becomes extremely high, so the range is set to 0.05 to 0.15%.
【００１８】Ｓｉ：０．３０〜１．０％ Ｓｉは主脱酸剤であり、また溶接金属の降伏強度を高め
る効果がある。しかし、０．３％未満では脱酸不足とな
り、ブローホールを発生させる。また、１．０％超える
とマトリックスを固溶強化して著しく溶接金属の靱性を
低下させるので、０．３０〜１．０％を範囲とした。Si: 0.30 to 1.0% Si is a main deoxidizer and has an effect of increasing the yield strength of the weld metal. However, if it is less than 0.3%, deoxidation becomes insufficient, and blowholes are generated. If the content exceeds 1.0%, the matrix is solid-solution strengthened and the toughness of the weld metal is significantly reduced.
【００１９】Ｍｎ：１．７０〜３．０％ ＭｎはＳｉとともに脱酸剤として作用するほか、溶接金
属の強度および靱性を確保する上で効果がある。１．７
０％未満では引張強度および降伏強度が不足し、３．０
％を超えると引張強度のみが増加し、靱性はむしろ低下
するので、範囲を１．７０〜３．０％とした。Mn: 1.70-3.0% Mn acts as a deoxidizing agent together with Si and is effective in securing the strength and toughness of the weld metal. 1.7
If it is less than 0%, the tensile strength and the yield strength are insufficient, and 3.0%
%, Only the tensile strength increases, and the toughness rather decreases. Therefore, the range is set to 1.70 to 3.0%.
【００２０】Ｐ、Ｓ：０．０１０％以下、 ＰおよびＳはともに低融点の化合物を粒界に生成して、
粒界の強度を劣化させる結果、溶接金属の靱性を著しく
損なうので、それぞれ０．０１０％以下とした。 Ｎｉ：２．３０〜３．５％ Ｎｉは強度、靱性を確保する目的で添加するが、８０〜
１００キロ級鋼の場合、２．３０％未満ではその効果が
不十分であり、３．５％超では薄板の溶接金属の耐割れ
性が低下することから、範囲を２．３０〜３．５％とし
た。P, S: 0.010% or less P and S both form a low melting point compound at the grain boundary,
As a result of deteriorating the strength of the grain boundaries, the toughness of the weld metal is significantly impaired. Ni: 2.30 to 3.5% Ni is added for the purpose of securing strength and toughness.
In the case of 100 kg class steel, if the content is less than 2.30%, the effect is insufficient, and if it exceeds 3.5%, the crack resistance of the weld metal of the thin plate is reduced, so that the range is 2.30 to 3.5. %.
【００２１】Ｃｒ：０．９０〜１．５０％ Ｃｒは溶接金属の強度を確保するために適量添加する。
しかし、０．９０％未満ではその効果が不十分であり、
１．５０％を超えると靱性低下が認められることから、
範囲を０．９０〜１．５０％とした。 Ｍｏ：０．３０〜１．００％、 Ｍｏは溶接金属の焼戻し軟化抵抗を高め、薄板の少層溶
接におけるミクロ組織粗大化による強度低下を防ぐ目的
で適量添加する。しかし、Ｍｏ量が０．３０％未満では
上記効果が不十分であり、１．００％を超えるとＭｏの
炭化物を析出して、溶接金属の硬化と靱性の低下を来す
ことから、範囲を０．３０〜１．００％とした。Cr: 0.90 to 1.50% Cr is added in an appropriate amount to secure the strength of the weld metal.
However, the effect is insufficient if it is less than 0.90%,
When the content exceeds 1.50%, a decrease in toughness is observed.
The range was 0.90 to 1.50%. Mo: 0.30 to 1.00%, Mo is added in an appropriate amount for the purpose of increasing the tempering softening resistance of the weld metal and preventing a decrease in strength due to coarsening of the microstructure in thin layer welding of thin sheets. However, if the Mo content is less than 0.30%, the above effect is insufficient. If the Mo content is more than 1.00%, carbides of Mo are precipitated, resulting in hardening of the weld metal and a decrease in toughness. 0.30 to 1.00%.
【００２２】Ａｌ：０．００５〜０．０１０％ Ａｌは強脱酸元素であり、極微量の添加で溶接金属の酸
素を低減し、靱性向上に効果を示す。しかし、０．００
５％未満では上記効果は認められず、０．０１０％を超
えると大型のＡｌ酸化物の析出により靱性が著しく低下
する。 Ｔｉ：０．００５〜０．１０％ ＴｉはＡｌと同様に強脱酸剤であり、溶接金属のミクロ
組織を微細化して、靱性向上に効果があり、Ａｌとの共
存でその効果が高まる。その効果は、０．００５％未満
では発揮されず、０．１０％を超えると靱性を低下させ
ることから、範囲を０．００５〜０．１０％とした。Al: 0.005 to 0.010% Al is a strong deoxidizing element, and reduces the oxygen of the weld metal by adding a trace amount thereof, and has an effect of improving the toughness. However, 0.00
If it is less than 5%, the above effect is not recognized. If it exceeds 0.010%, the toughness is remarkably reduced due to precipitation of large Al oxide. Ti: 0.005 to 0.10% Ti is a strong deoxidizing agent like Al, and has an effect of improving the toughness by refining the microstructure of the weld metal, and its effect is enhanced by coexistence with Al. The effect is not exhibited when the content is less than 0.005%, and the toughness is reduced when the content exceeds 0.10%. Therefore, the range is set to 0.005 to 0.10%.
【００２３】Ｚｒ：０．００５〜０．０１０％ ＺｒはＡｌ、Ｔｉと同様に強脱酸剤であり、Ａｌ、Ｔｉ
との複合添加により溶接金属の酸素を低減し、さらに靱
性向上に効果がある。しかし、Ｚｒ量が０．００５％未
満では靱性向上効果は得られず、また０．０１０％を超
えると靱性が低下する。Zr: 0.005 to 0.010% Zr is a strong deoxidizing agent like Al and Ti.
Addition of a combination with the above has the effect of reducing the oxygen of the weld metal and further improving the toughness. However, if the Zr content is less than 0.005%, the effect of improving toughness cannot be obtained, and if it exceeds 0.010%, the toughness decreases.
【００２４】Ｎｂ：０．００１〜０．１０％、 Ｎｂは微細な窒炭化物を析出し、溶接金属の強度を高め
る目的で添加する。しかし、０．００１％未満では強度
を高める効果が不十分であり、０．１０％を超えるとむ
しろ靱性を低下させるので、範囲を０．００１〜０．１
０％とした。 Ｖ：０．００５〜０．１０％ Ｖは微細な窒炭化物を析出し、溶接金属の強度を高める
目的で添加する。しかし、０．００５％未満では強度を
高める効果が不十分であり、０．１０％を超えるとむし
ろ靱性を低下させるので、範囲を０．００５〜０．１０
％とした。Nb: 0.001 to 0.10%, Nb is added for the purpose of precipitating fine nitrided carbides and increasing the strength of the weld metal. However, if the content is less than 0.001%, the effect of increasing the strength is insufficient, and if it exceeds 0.10%, the toughness is rather reduced.
0%. V: 0.005 to 0.10% V is added for the purpose of precipitating fine nitrided carbides and increasing the strength of the weld metal. However, if the content is less than 0.005%, the effect of increasing the strength is insufficient, and if it exceeds 0.10%, the toughness is rather reduced, so the range is 0.005 to 0.10.
%.
【００２５】Ｎ：０．０００５〜０．０１０％ ＮはＮｂ、Ｖとの窒化物を析出し、強度向上効果を目的
として微量添加する。しかし０．０００５％未満ではＮ
ｂ、Ｖ添加の効果を有効に発揮できず、強度向上効果が
期待できない。また、０．０１０％を超えるとブローホ
ールが発生するため、０．０１０％を上限とした。N: 0.0005 to 0.010% N precipitates a nitride with Nb and V and is added in a small amount for the purpose of improving the strength. However, if it is less than 0.0005%, N
b) The effect of adding V cannot be effectively exhibited, and the effect of improving strength cannot be expected. Further, when the content exceeds 0.010%, blowholes are generated. Therefore, the upper limit is set to 0.010%.
【００２６】Ｏは０．００５０％以下 Ｏは０．００５０％を超えると溶接金属の酸素が高ま
り、靱性を損なうので、０．００５０％を上限とした。
以下に実施例により、本発明を具体的に説明する。O is not more than 0.0050% When O exceeds 0.0050%, the oxygen of the weld metal increases and the toughness is impaired, so the upper limit was made 0.0050%.
Hereinafter, the present invention will be specifically described with reference to Examples.
【００２７】[0027]
【実施例】表４および表５（表４のつづき）に示す化学
成分のワイヤ径１．２ｍｍφの鋼ワイヤを用いて、図１
の開先により、表２の溶接条件で溶接を行い、溶接継手
を作製した。この継手からＪＩＳＡ２号の引張試験片お
よび２ｍｍＶノッチシャルピー試験片を採取して機械的
試験により評価した結果を表６に示す。EXAMPLE A steel wire having a chemical diameter shown in Tables 4 and 5 (continued from Table 4) having a wire diameter of 1.2 mm was used as shown in FIG.
Were welded under the welding conditions shown in Table 2 to produce welded joints. Table 6 shows the results of taking out a tensile test piece of JISA No. 2 and a 2 mmV notch Charpy test piece from this joint and evaluating them by a mechanical test.
【００２８】衝撃試験は−２０℃の吸収エネルギーが７
０Ｊ以上を良好と判定し、伸びについては１５％以上を
良好と判定する目安とした。また、引張強さは９８０Ｎ
／ｍｍ2 以上を、０．２％耐力は７８０Ｎ／ｍｍ2 以上
を目標とした。In the impact test, the absorption energy at -20 ° C. was 7
0J or more was determined to be good, and elongation was 15% or more as a guideline for determining good. The tensile strength is 980N
/ Mm 2 or more and 0.2% proof stress of 780 N / mm 2 or more.
【００２９】[0029]
【表４】 [Table 4]
【００３０】[0030]
【表５】 [Table 5]
【００３１】[0031]
【表６】 [Table 6]
【００３２】ワイヤＮｏ．６は、Ｔｉおよび（Ａｌ＋Ｔ
ｉ＋Ｚｒ＋Ｎｂ＋Ｖ）／（Ｃ＋Ｎ）の比が本発明の限定
範囲を超えているため、引張強度は高いが０．２％耐力
は低く、また伸びおよび靱性も低下している。ワイヤＮ
ｏ．７はＳｉ、Ｍｎ、Ｎｉが高いため、引張強さは得ら
れるものの、０．２％耐力と伸びが低値となっている。Wire No. 6 are Ti and (Al + T
Since the ratio of (i + Zr + Nb + V) / (C + N) exceeds the limited range of the present invention, the tensile strength is high but the 0.2% proof stress is low, and the elongation and toughness are also low. Wire N
o. No. 7 has high Si, Mn, and Ni, and thus has high tensile strength, but low 0.2% proof stress and elongation.
【００３３】ワイヤＮｏ．８はＮｉ、Ｃｒ、Ｍｏがとも
に低いため、０．２％耐力、引張強さとも十分な値が得
られない。ワイヤＮｏ．９はＰ、Ｓが高く、またＶ、Ａ
ｌ、Ｔｉが不足し、（Ａｌ＋Ｔｉ＋Ｚｒ＋Ｎｂ＋Ｖ）／
（Ｃ＋Ｎ）比が本発明の限定範囲に満たないため、強度
不足とともに靱性が劣化している。Wire No. In No. 8, since Ni, Cr and Mo are all low, sufficient values cannot be obtained for both the 0.2% proof stress and the tensile strength. Wire No. 9 has high P and S, and V and A
l, Ti shortage, (Al + Ti + Zr + Nb + V) /
Since the (C + N) ratio is less than the limited range of the present invention, the strength is insufficient and the toughness is deteriorated.
【００３４】ワイヤＮｏ．１０は（Ａｌ＋Ｔｉ＋Ｚｒ＋
Ｎｂ＋Ｖ）／（Ｃ＋Ｎ）が本発明範囲未満のため、０．
２％耐力、伸び、靱性が得られない。これらの比較ワイ
ヤに比べて、本発明範囲のワイヤＮｏ．１〜５の各ワイ
ヤは、いずれの項目の全てに良好な成績が得られるてい
る。Wire No. 10 is (Al + Ti + Zr +
Nb + V) / (C + N) is less than the range of the present invention.
2% yield strength, elongation and toughness cannot be obtained. Compared to these comparative wires, the wire Nos. In each of the wires 1 to 5, good results were obtained in all of the items.
【００３５】[0035]
【発明の効果】以上のように、本発明のワイヤにおいて
は、合金元素の添加量および（Ａｌ＋Ｔｉ＋Ｚｒ＋Ｎｂ
＋Ｖ）／（Ｃ＋Ｎ）の比を０．２〜４．０に特定する構
成により、薄板のガスシールドアーク溶接金属の耐力、
強度を確保し、かつ良好な延性と高い衝撃靱性を得るこ
とが可能となった。As described above, in the wire according to the present invention, the amount of alloying element and the amount of (Al + Ti + Zr + Nb)
+ V) / (C + N) is specified in the range of 0.2 to 4.0, so that the strength of the gas-shielded arc weld metal of a thin plate can be improved.
It has become possible to secure strength and obtain good ductility and high impact toughness.
【図１】試験板の開先形状を示す図である。FIG. 1 is a diagram showing a groove shape of a test plate.
フロントページの続き (72)発明者 鈴木 洋三 千葉県富津市新富20−１ 新日本製鐵株 式会社技術開発本部内 (56)参考文献 特開 平８−25080（ＪＰ，Ａ) 特開 平７−276080（ＪＰ，Ａ) 特開 平３−221294（ＪＰ，Ａ) 特開 平３−146296（ＪＰ，Ａ) 特開 平１−233088（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B23K 35/30 Continuation of front page (72) Inventor Yozo Suzuki 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Headquarters (56) References JP-A-8-25080 (JP, A) JP-A-7 -276080 (JP, A) JP-A-3-221294 (JP, A) JP-A-3-146296 (JP, A) JP-A 1-233088 (JP, A) (58) Fields investigated (Int. . 7, DB name) B23K 35/30
Claims (1)
＋Ｎ）が０．２〜４．０の範囲にあり、残部が実質的に
Ｆｅよりなることを特徴とする高張力鋼用ガスシールド
アーク溶接鋼ワイヤ。C. 0.05 to 0.15%, Si: 0.30 to 1.0%, Mn: 1.70 to 3.0%, P : 0.010% or less, S: 0.010% or less, Ni: 2.30 to 3.5%, Cr: 0.90 to 1.50%, Mo: 0.30 to 1.00%, Al: 0.005 to 0.010%, Ti: 0.005 to 0.10%, Zr: 0.005 to 0.010%, Nb: 0.001 to 0.10%, V: 0.005 to 0. 10%, N: 0.0005 to 0.010%, O: 0.0050% or less, and (Al + Ti + Zr + Nb + V) / (C
+ N) is in the range of 0.2 to 4.0, and the balance is substantially made of Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32655294A JP3360235B2 (en) | 1994-12-28 | 1994-12-28 | Gas shielded arc welded steel wire for high tensile steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32655294A JP3360235B2 (en) | 1994-12-28 | 1994-12-28 | Gas shielded arc welded steel wire for high tensile steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08174268A JPH08174268A (en) | 1996-07-09 |
| JP3360235B2 true JP3360235B2 (en) | 2002-12-24 |
Family
ID=18189107
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32655294A Expired - Fee Related JP3360235B2 (en) | 1994-12-28 | 1994-12-28 | Gas shielded arc welded steel wire for high tensile steel |
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| Country | Link |
|---|---|
| JP (1) | JP3360235B2 (en) |
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| CN112496595B (en) * | 2020-12-29 | 2022-11-11 | 中国电建集团上海能源装备有限公司 | Gas shielded welding wire for nuclear power containment vessel and preparation and application thereof |
| CN113637916A (en) * | 2021-08-19 | 2021-11-12 | 山西通才工贸有限公司 | Ultrahigh-strength hot-rolled anchor rod steel bar and production method thereof |
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- 1994-12-28 JP JP32655294A patent/JP3360235B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JPH08174268A (en) | 1996-07-09 |
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