JP3375905B2 - Gas shielded arc welding wire for high Cr ferritic heat resistant steel - Google Patents
Gas shielded arc welding wire for high Cr ferritic heat resistant steelInfo
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- JP3375905B2 JP3375905B2 JP03490199A JP3490199A JP3375905B2 JP 3375905 B2 JP3375905 B2 JP 3375905B2 JP 03490199 A JP03490199 A JP 03490199A JP 3490199 A JP3490199 A JP 3490199A JP 3375905 B2 JP3375905 B2 JP 3375905B2
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高Ｃｒフェライト
系耐熱鋼用ガスシールドアーク溶接ワイヤに関し、特に
９乃至１２重量％のＣｒを含有する低合金を対象として
高温におけるクリープ強度及び靭性が優れた溶接金属を
得ることができる高Ｃｒフェライト系耐熱鋼用ガスシー
ルドアーク溶接ワイヤに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shielded arc welding wire for high Cr ferritic heat-resistant steel, and particularly to a low alloy containing 9 to 12% by weight of Cr, which has excellent creep strength and toughness at high temperature. The present invention relates to a gas shielded arc welding wire for high Cr ferritic heat resistant steel capable of obtaining a weld metal.
【０００２】[0002]
【従来の技術】近時、火力発電用のボイラーには耐熱性
が優れた各種Ｃｒ−Ｍｏ鋼が使用されてきている。近年
の地球環境問題の観点から発電効率の向上が求められて
おり、蒸気条件はより高温・高圧にすることが計画され
ている。2. Description of the Related Art Recently, various Cr-Mo steels having excellent heat resistance have been used for boilers for thermal power generation. From the viewpoint of global environmental problems in recent years, improvement in power generation efficiency is required, and steam conditions are planned to be higher temperature and pressure.
【０００３】このため、火力発電用のボイラーに使用さ
れる鋼材の特性も高温強度の優れた材料が求められてお
り、改良９Ｃｒ−１Ｍｏ鋼からより高温強度が優れた９
乃至１２Ｃｒ鋼が開発されている。Therefore, there is a demand for a material having excellent high-temperature strength as a characteristic of the steel material used for the boiler for thermal power generation. From the improved 9Cr-1Mo steel, the high-temperature strength 9 is superior.
To 12Cr steel have been developed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、これら
の鋼材の実用化のためには、溶接材料の開発が必須であ
り、鋼材と同等の性能を有する溶接材料が求められてい
るが、実用化に耐える十分な性能を有する溶接材料はな
いという問題点がある。However, in order to put these steel materials into practical use, the development of welding materials is essential, and welding materials having the same performance as steel materials are required. There is a problem that no welding material has sufficient performance to endure.
【０００５】本発明はかかる問題点に鑑みてなされたも
のであって、改良９Ｃｒ−１Ｍｏ鋼に続く、高強度９乃
至１２Ｃｒ鋼等の溶接材料として母材と同等のクリープ
強度を有し、常温で十分な靭性を有する高Ｃｒフェライ
ト系耐熱鋼用ガスシールドアーク溶接ワイヤを提供する
ことを目的とする。The present invention has been made in view of the above problems, and has a creep strength equivalent to that of the base metal as a welding material such as high strength 9 to 12Cr steel following the improved 9Cr-1Mo steel, and has a room temperature. To provide a gas shielded arc welding wire for high Cr ferritic heat resistant steel having sufficient toughness.
【０００６】[0006]
【課題を解決するための手段】本発明に係る高Ｃｒフェ
ライト系耐熱鋼用ガスシールドアーク溶接ワイヤは、ワ
イヤ全重量当たり、Ｃを０．０２乃至０．１５重量％、
Ｓｉを０．１０乃至１．００重量％、Ｍｎを０．３０乃
至１．５０重量％、Ｃｕを０．０５乃至２．０重量％、
Ｎｉを０．０５乃至１．２０重量％、Ｃｒを８乃至１３
重量％、Ｍｏを０．０１乃至１．２０重量％、Ｖを０．
０３乃至０．５０重量％、Ｎｂを０．０２乃至０．１５
重量％、Ｗを０．８乃至３．５重量％、Ｎを０．０１乃
至０．０８重量％及びＴｉを０．０００８乃至０．０９
重量％を含有し、残部がＦｅ及び不可避的不純物からな
ることを特徴とする。The gas shielded arc welding wire for high Cr ferritic heat-resistant steel according to the present invention comprises 0.02 to 0.15% by weight of C, based on the total weight of the wire.
Si 0.10 to 1.00% by weight, Mn 0.30 to 1.50% by weight, Cu 0.05 to 2.0% by weight,
0.05 to 1.20% by weight of Ni and 8 to 13 of Cr
% By weight, 0.01 to 1.20% by weight of Mo and V.
03 to 0.50 wt%, Nb 0.02 to 0.15
% By weight, 0.8 to 3.5% by weight of W, 0.01 to 0.08% by weight of N, and 0.0008 to 0.09 of Ti.
%, And the balance consists of Fe and inevitable impurities.
【０００７】本発明においては、ワイヤ全重量当たり、
更にＣｏを０．４５重量％以下及びＢを０．０００５乃
至０．００８重量％を含有することが好ましい。In the present invention, based on the total weight of the wire,
Further, it is preferable to contain Co in an amount of 0.45% by weight or less and B in an amount of 0.0005 to 0.008% by weight.
【０００８】[0008]
【発明の実施の形態】以下、本発明の高Ｃｒフェライト
系耐熱鋼用ガスシールドアーク溶接ワイヤの各元素の範
囲設定の理由について詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION The reason for setting the range of each element of the gas shielded arc welding wire for high Cr ferritic heat resistant steel of the present invention will be described in detail below.
【０００９】Ｃ：０．０２乃至０．１５重量％
Ｃはオーステナイト安定化元素の１つであり、添加する
ことにより低靭性の原因となるδフェライトの生成を抑
制することができる。炭化物の生成傾向の強いＮｂ又は
Ｖと結合して、炭化物となりクリープ強度の向上に有効
である。Ｃの含有量が０．０２重量％未満ではこれらの
効果を得ることができない。一方、Ｃの含有量が０．１
５重量％を超えると強度の過度の上昇により靭性又は耐
割れ性が低下する。従って、Ｃの含有量は０．０２乃至
０．１５重量％とする。 C: 0.02 to 0.15 wt% C is one of the austenite stabilizing elements, and its addition can suppress the formation of δ ferrite, which causes low toughness. By combining with Nb or V, which has a strong tendency to form carbides, it becomes carbides and is effective in improving creep strength. If the C content is less than 0.02% by weight, these effects cannot be obtained. On the other hand, the content of C is 0.1
If it exceeds 5% by weight, the toughness or crack resistance is lowered due to excessive increase in strength. Therefore, the content of C is set to 0.02 to 0.15% by weight.
【００１０】Ｓｉ：０．１０乃至１．００重量％
Ｓｉは脱酸元素として重要な働きをし、ガスシールド溶
接において溶接ビードのなじみの改善に有効である。し
かし、Ｓｉの含有量が０．１０重量％未満ではこれらの
効果が不十分である。一方、Ｓｉの含有量が１．００重
量％を超えると強度が過度になり、靭性又は耐割れ性が
低下する。従って、Ｓｉの含有量は０．１０乃至１．０
０重量％とする。 Si: 0.10 to 1.00 wt% Si plays an important role as a deoxidizing element and is effective in improving the familiarity of weld beads in gas shield welding. However, if the Si content is less than 0.10% by weight, these effects are insufficient. On the other hand, if the Si content exceeds 1.00% by weight, the strength becomes excessive, and the toughness or crack resistance decreases. Therefore, the Si content is 0.10 to 1.0.
It is 0% by weight.
【００１１】Ｍｎ：０．３０乃至１．５０重量％
Ｍｎもオーステナイト安定化元素の１つであり、添加す
ることにより低靭性の原因となるδフェライトの生成を
抑制することができる。しかし、Ｍｎの含有量が０．３
０重量％未満ではこの効果を得ることができない。一
方、Ｍｎの含有量が１．５０重量％を超えるとクリープ
強度の低下を招く。従って、Ｍｎの含有量は０．３０乃
至１．５０重量％とする。 Mn: 0.30 to 1.50 wt% Mn is also an austenite stabilizing element, and the addition thereof can suppress the formation of δ ferrite which causes low toughness. However, if the Mn content is 0.3
If it is less than 0% by weight, this effect cannot be obtained. On the other hand, when the content of Mn exceeds 1.50% by weight, the creep strength is lowered. Therefore, the Mn content is set to 0.30 to 1.50% by weight.
【００１２】Ｃｕ：０．０５乃至２．０重量％
Ｃｕもオーステナイト安定化元素の１つであり、添加す
ることにより低靭性の原因となるδフェライトの生成を
抑制することができる。また、メッキとして使用した場
合には、ワイヤとコンタクトチップ間の通電性を改善す
る効果がある。オーステナイト安定化のため、Ｃｕの含
有量は０．０５重量％以上の添加が必要である。一方、
Ｃｕの含有量が２．０重量％を超えると高温割れの感受
性が増大し好ましくない。従って、Ｃｕの含有量は０．
０５乃至２．０重量％とする。 Cu: 0.05 to 2.0 wt% Cu is also one of the austenite stabilizing elements, and its addition can suppress the formation of δ ferrite which causes low toughness. Further, when used as plating, it has an effect of improving the electrical conductivity between the wire and the contact tip. In order to stabilize austenite, it is necessary to add Cu in an amount of 0.05% by weight or more. on the other hand,
If the Cu content exceeds 2.0% by weight, the susceptibility to hot cracking increases, which is not preferable. Therefore, the Cu content is 0.
It is set to 05 to 2.0% by weight.
【００１３】Ｎｉ：０．０５乃至1．２０重量％
Ｎｉもオーステナイトの安定化元素として極めて有効で
あり、靭性の安定化に有効である。しかしながら、Ｎｉ
の含有量が０．０５重量％未満では十分な効果を得るこ
とができない。一方、Ｎｉの含有量が１．２０重量％を
超えるとクリープ強度の低下の原因となり好ましくな
い。従って、Ｎｉの含有量は０．０５乃至１．２０重量
％とする。 Ni: 0.05 to 1.20 wt% Ni is also extremely effective as a stabilizing element for austenite, and is also effective for stabilizing toughness. However, Ni
If the content of is less than 0.05% by weight, a sufficient effect cannot be obtained. On the other hand, if the Ni content exceeds 1.20% by weight, the creep strength is reduced, which is not preferable. Therefore, the Ni content is 0.05 to 1.20% by weight.
【００１４】Ｃｒ：８乃至１３重量％
Ｃｒは耐熱鋼としての耐酸化性の確保に重要な元素であ
ると同時に固溶強化元素として、クリープ強度の向上に
有効である。しかし、Ｃｒの含有量が８重量％未満であ
ると、これらの特性が十分ではない。一方、Ｃｒの含有
量が１３重量％を超えると、フェライト安定化元素の働
きが作用して、δフェライトの析出を招き靭性が低下す
る。従って、Ｃｒの含有量は８乃至１３重量％とする。 Cr: 8 to 13% by weight Cr is an element which is important for ensuring the oxidation resistance of the heat-resistant steel, and at the same time effective as a solid solution strengthening element for improving the creep strength. However, if the Cr content is less than 8% by weight, these characteristics are not sufficient. On the other hand, when the content of Cr exceeds 13% by weight, the function of the ferrite stabilizing element acts to induce the precipitation of δ ferrite and the toughness decreases. Therefore, the content of Cr is set to 8 to 13% by weight.
【００１５】Ｍｏ：０．０１乃至１．２０重量％
ＭｏはＣｒと同様、固溶強化元素として働き、クリープ
強度の向上に有効である。しかしながら、Ｍｏの含有量
が０．０１重量％未満ではこの効果が十分ではない。一
方、Ｍｏの含有量が１．２０重量％を超えると強度が高
くなりすぎて、靭性の低下又は耐割れ性の低下を招く。
従って、Ｍｏの含有量は０．０１乃至１．２０重量％と
する。 Mo: 0.01 to 1.20 wt% Mo acts as a solid solution strengthening element like Cr, and is effective in improving creep strength. However, if the Mo content is less than 0.01% by weight, this effect is not sufficient. On the other hand, when the content of Mo exceeds 1.20% by weight, the strength becomes too high, leading to a decrease in toughness or crack resistance.
Therefore, the Mo content is set to 0.01 to 1.20% by weight.
【００１６】Ｖ：０．０３乃至０．５０重量％
Ｖは炭窒化物を形成し、クリープ強度の向上に極めて有
効である。しかし、Ｖの含有量が０．０３重量％未満で
はその効果がない。一方、Ｖの含有量が０．５０重量％
を超えると強度が高くなりすぎ、靭性の低下又は耐割れ
性の低下を招く。従って、Ｖの含有量は０．０３乃至
０．５０重量％とする。 V: 0.03 to 0.50 wt% V forms carbonitrides and is extremely effective in improving creep strength. However, if the V content is less than 0.03% by weight, the effect is not obtained. On the other hand, the V content is 0.50% by weight
If it exceeds 1.0, the strength becomes too high, resulting in a decrease in toughness or crack resistance. Therefore, the V content is 0.03 to 0.50 wt%.
【００１７】Ｎｂ：０．０２乃至０．１５重量％
Ｎｂは炭窒化物を形成し、クリープ強度の向上に極めて
有効である。しかし、Ｎｂの含有量が０．０２重量％未
満ではその効果がない。一方、Ｎｂの含有量が０．１５
重量％を超えると強度が高くなりすぎ、靭性の低下又は
耐割れ性の低下を招く。従って、Ｎｂの含有量は０．０
２乃至０．１５重量％とする。 Nb: 0.02 to 0.15 wt% Nb forms a carbonitride and is extremely effective in improving creep strength. However, if the Nb content is less than 0.02% by weight, the effect is not obtained. On the other hand, the Nb content is 0.15
If the content is more than wt%, the strength becomes too high, resulting in a decrease in toughness or crack resistance. Therefore, the Nb content is 0.0
2 to 0.15% by weight.
【００１８】Ｗ：０．８乃至３．５重量％
Ｗは固溶強化元素として、特にクリープ強度の向上に有
効である。しかし、Ｗの含有量が０．８重量％未満では
効果を得ることができない。一方、Ｗの含有量が３．５
重量％を超えると逆に強度が高くなりすぎ、靭性又は耐
割れ性の低下を招く。従って、Ｗの含有量は０．８乃至
３．５重量％とする。 W: 0.8 to 3.5 wt% W is a solid solution strengthening element and is particularly effective for improving creep strength. However, if the W content is less than 0.8% by weight, the effect cannot be obtained. On the other hand, the content of W is 3.5
On the other hand, if the content exceeds 10% by weight, the strength will be too high and the toughness or crack resistance will be deteriorated. Therefore, the W content is 0.8 to 3.5% by weight.
【００１９】Ｎ：０．０１乃至０．０８重量％
Ｎはオーステナイトの安定化元素として働き、靭性の安
定化に有効であると共に、窒化物を形成しクリープ強度
の改善に有効である。Ｎの含有量が０．０１重量％未満
ではこれらの効果を得ることができない。一方、Ｎの含
有量が０．０８重量％を超えると溶接金属中に球状欠陥
を生じ易くなるので好ましくない。従って、Ｎの含有量
は０．０１乃至０．０８重量％とする。 N: 0.01 to 0.08 wt% N acts as a stabilizing element for austenite, is effective in stabilizing toughness, and is effective in improving creep strength by forming a nitride. If the N content is less than 0.01% by weight, these effects cannot be obtained. On the other hand, if the N content exceeds 0.08% by weight, spherical defects are likely to occur in the weld metal, which is not preferable. Therefore, the N content is 0.01 to 0.08% by weight.
【００２０】Ｔｉ：０．０００８乃至０．０９重量％
Ｔｉは炭窒化物の安定化及び微細化に有効であると共
に、クリープ強度の向上に極めて有効である。特に高Ｃ
ｒ系のフェライト鋼においてＷによる固溶強化と併用す
ることで、Ｔｉのクリープ強度に及ぼす影響は添加量が
微量でも顕著である。しかし、Ｔｉの含有量が０．００
０８重量％未満ではその効果を得ることができない。一
方、Ｔｉの含有量が０．０９重量％を超えると多量のＴ
ｉの析出物のために靭性が低下する。従って、Ｔｉの含
有量は０．０００８乃至０．０９重量％とする。 Ti: 0.0008 to 0.09 wt% Ti is effective in stabilizing and refining carbonitrides, and is extremely effective in improving creep strength. Especially high C
When used in combination with solid solution strengthening with W in r-type ferritic steel, the effect of Ti on the creep strength is remarkable even with a small amount of addition. However, if the Ti content is 0.00
If it is less than 08% by weight, the effect cannot be obtained. On the other hand, if the Ti content exceeds 0.09% by weight, a large amount of T
The toughness decreases due to the precipitate of i. Therefore, the Ti content is set to 0.0008 to 0.09% by weight.
【００２１】Ｃｏ：０．４５重量％以下
ＣｏもＣｒ、Ｍｏ及びＷと同様に固溶強化元素として働
くと共に、オーステナイト安定化元素としての働きも併
せ持っている。Ｃｏの含有量が０．４５重量％を超える
と過度の強度となり、靭性又は耐割れ性の低下を招く。
従って、Ｃｏの含有量は０．４５重量％以下とする。 Co: 0.45 wt% or less Co, like Cr, Mo and W, also functions as a solid solution strengthening element and also functions as an austenite stabilizing element. When the Co content exceeds 0.45% by weight, the strength becomes excessive and the toughness or crack resistance is deteriorated.
Therefore, the Co content is 0.45% by weight or less.
【００２２】Ｂ：０．０００５乃至０．００８重量％
Ｂは粒界の強度を向上させ、その結果クリープ強度の向
上に有効である。Ｂの含有量が０．０００５重量％以上
であるとその効果が発現する。一方、Ｂの含有量が０．
００８重量％を超えると靭性の低下の原因となる。従っ
て、Ｂの含有量は０．０００５乃至０．００８重量％と
する。 B: 0.0005 to 0.008 wt% B improves the strength of the grain boundary, and as a result, is effective in improving the creep strength. When the B content is 0.0005% by weight or more, the effect is exhibited. On the other hand, the content of B is 0.
If it exceeds 008% by weight, toughness is reduced. Therefore, the content of B is set to 0.0005 to 0.008% by weight.
【００２３】なお、Ｐ、Ｓ、Ｓｎ、Ｓｂ及びＡｓ等の不
純物は低く抑えることが望ましい。また、本発明の高Ｃ
ｒフェライト系耐熱鋼用ガスシールドアーク溶接ワイヤ
はＡｒガスとＣＯ2ガスとの混合ガス又はＡｒガスとＯ2
ガスとの混合ガスをシールドガスとして使用するマグ溶
接若しくは純Ａｒガスをシールドガスとして使用するテ
ィグ溶接に使用可能である。Impurities such as P, S, Sn, Sb and As are desirably kept low. In addition, the high C of the present invention
Gas shielded arc welding wire for r ferritic heat resistant steel is a mixed gas of Ar gas and CO 2 gas or Ar gas and O 2
It can be used for mag welding using a mixed gas with gas as a shielding gas or TIG welding using pure Ar gas as a shielding gas.
【００２４】[0024]
【実施例】以下本発明の高Ｃｒフェライト系耐熱鋼用ガ
スシールドアーク溶接ワイヤの実施例について、本発明
の範囲から外れる比較例と比較して具体的に説明する。EXAMPLES Examples of the gas shielded arc welding wire for high Cr ferritic heat-resistant steel of the present invention will be specifically described below in comparison with comparative examples outside the scope of the present invention.
【００２５】表１乃至表６に示す化学組成のワイヤを製
作し、溶接試験を行った。溶接はＪＩＳ Ｚ ３３１７
に準拠し、供試母材としてＪＩＳ ＳＭ４９０Ａ鋼を使
用し、このＪＩＳ ＳＭ４９０Ａ鋼の開先面を表１乃至
表６に示す化学組成のワイヤを使用して表７に示す溶接
条件に基づいてバタリングして実施した。なお、溶接性
に問題のなかったものは試験片採取可、即ち○とし、溶
接性に問題のあったものは試験片採取否、即ち×とし
た。A wire having the chemical composition shown in Tables 1 to 6 was manufactured and a welding test was conducted. Welding is JIS Z 3317
JIS SM490A steel is used as a test base metal, and the groove surface of this JIS SM490A steel is buttered on the basis of the welding conditions shown in Table 7 by using the wire having the chemical composition shown in Tables 1 to 6. It was carried out. If there was no problem in the weldability, the test piece could be taken, that is, ◯, and if there was a problem in the weldability, the test piece was not taken, that is, x.
【００２６】溶接試験終了後、溶接性に問題のなかった
溶接材料（表８乃至表１０の試験片採取可否の欄に○印
のある溶接材料）による試験板には７４０℃の温度で８
時間のＰＷＨＴ（溶接後熱処理；post weld heat tr
eatment）を施し、シャルピー衝撃試験片（ＪＩＳ Ｚ
３１１１ ４号）及びクリープ破断試験片（ＪＩＳＺ
２２７２）を溶接金属中央及び板厚中央より採取し、
シャルピー衝撃試験及びクリープ破断試験を行った。After completion of the welding test, a test plate made of a welding material having no problem in weldability (a welding material having a circle in the column of whether or not to collect test pieces in Tables 8 to 10) was used at a temperature of 740 ° C.
PWHT (post weld heat tr)
eatment), and Charpy impact test piece (JIS Z
31114 No.) and creep rupture test piece (JISZ
2272) from the center of the weld metal and the center of the plate thickness,
A Charpy impact test and a creep rupture test were performed.
【００２７】シャルピー衝撃試験は０℃の温度で実施し
た。判定基準は吸収エネルギを５０Ｊとした。The Charpy impact test was carried out at a temperature of 0 ° C. The criterion for the determination was that the absorbed energy was 50J.
【００２８】クリープ破断試験は６５０℃の温度で荷重
が１２５ＭＰａの試験条件で行った。判定基準は破断時
間を１０００時間以上とした。これらの試験結果を表８
乃至表１０に示す。The creep rupture test was conducted at a temperature of 650 ° C. and under a load of 125 MPa. The criterion was a breaking time of 1000 hours or more. Table 8 shows these test results.
Through Table 10.
【００２９】[0029]
【表１】 [Table 1]
【００３０】[0030]
【表２】 [Table 2]
【００３１】[0031]
【表３】 [Table 3]
【００３２】[0032]
【表４】 [Table 4]
【００３３】[0033]
【表５】 [Table 5]
【００３４】[0034]
【表６】 [Table 6]
【００３５】[0035]
【表７】 [Table 7]
【００３６】[0036]
【表８】 [Table 8]
【００３７】[0037]
【表９】 [Table 9]
【００３８】[0038]
【表１０】 [Table 10]
【００３９】上記表８乃至表１０に示すように、本発明
の範囲内にある実施例No.１乃至No.５はシャルピー衝撃
試験及びクリープ破断試験共に良好な結果を示した。即
ち、実施例No.１乃至No.５は靭性及びクリープ強度が優
れていた。一方、本発明の範囲から外れる比較例No.６
乃至No.３５においては、靭性、クリープ強度及び試験
片採取可否の全てについて良好な結果を示すものはなか
った。As shown in Tables 8 to 10 above, Examples No. 1 to No. 5 within the scope of the present invention showed good results in both the Charpy impact test and the creep rupture test. That is, Examples No. 1 to No. 5 were excellent in toughness and creep strength. On the other hand, Comparative Example No. 6 out of the scope of the present invention
In No. 35 to No. 35, none of them showed good results in terms of toughness, creep strength and availability of test piece collection.
【００４０】比較例No.６はＣの含有量が０．０１重量
％と本発明の範囲よりも低いため、吸収エネルギが判定
基準よりも低く靭性が乏しいと共に、クリープ破断時間
が短くクリープ強度が劣った。比較例No.７はＣの含有
量が０．１８重量％と本発明の範囲を超えているため、
吸収エネルギが判定基準よりも低く靭性が乏しいと共
に、クリープ破断時間が短くクリープ強度が劣った。Comparative Example No. 6 has a C content of 0.01% by weight, which is lower than the range of the present invention, so that the absorbed energy is lower than the criterion and the toughness is poor, and the creep rupture time is short and the creep strength is low. inferior. Comparative Example No. 7 has a C content of 0.18% by weight, which exceeds the range of the present invention.
The absorbed energy was lower than the criterion and the toughness was poor, and the creep rupture time was short and the creep strength was poor.
【００４１】比較例No.８はＳｉの含有量が０．０３重
量％と本発明の範囲よりも低いため、溶接ビードのなじ
みが劣り、作業性不良で機械試験（シャルピー衝撃試験
とクリープ破断試験）は中止となった。比較例No.９は
Ｓｉの含有量が１．２４重量％と本発明の範囲を超えて
いるため、強度が過多になり吸収エネルギが判定基準よ
りも低くなり靭性が低下した。Since Comparative Example No. 8 has a Si content of 0.03% by weight, which is lower than the range of the present invention, the weld bead is not well-fitted and the workability is poor, and mechanical tests (Charpy impact test and creep rupture test) ) Has been canceled. In Comparative Example No. 9, the Si content was 1.24% by weight, which was beyond the range of the present invention. Therefore, the strength was excessive, the absorbed energy was lower than the criterion, and the toughness was deteriorated.
【００４２】比較例No.１０はＭｎの含有量が０．１９
重量％と本発明の範囲よりも低いため、吸収エネルギが
判定基準よりも低く靭性が乏しかった。比較例No.１１
はＭｎの含有量が１．６７重量％と本発明の範囲を超え
ているため、クリープ破断時間が短くなった。Comparative Example No. 10 has a Mn content of 0.19
Since the weight% was lower than the range of the present invention, the absorbed energy was lower than the criterion and the toughness was poor. Comparative example No. 11
Since the Mn content was 1.67% by weight, which exceeded the range of the present invention, the creep rupture time was shortened.
【００４３】比較例No.１２はＣｕの含有量が０．０２
重量％と本発明の範囲よりも低いため、吸収エネルギが
判定基準よりも低く靭性が乏しかった。比較例No.１３
はＣｕの含有量が３．５９重量％と本発明の範囲を超え
ているため、高温割れの感受性が増大し高温割れが発生
し、機械試験（シャルピー衝撃試験とクリープ破断試
験）は中止になった。Comparative Example No. 12 has a Cu content of 0.02
Since the weight% was lower than the range of the present invention, the absorbed energy was lower than the criterion and the toughness was poor. Comparative example No. 13
Since the Cu content is 3.59% by weight, which exceeds the range of the present invention, the susceptibility to hot cracking increases and hot cracking occurs, and the mechanical test (Charpy impact test and creep rupture test) is stopped. It was
【００４４】比較例No.１４はＮｉの含有量が０．０２
重量％と本発明の範囲よりも低いため、吸収エネルギが
判定基準よりも低く靭性が乏しかった。比較例No.１５
はＮｉの含有量が１．４３重量％と本発明の範囲を超え
ているため、クリープ破断時間が短くなった。Comparative Example No. 14 has a Ni content of 0.02
Since the weight% was lower than the range of the present invention, the absorbed energy was lower than the criterion and the toughness was poor. Comparative example No.15
Since the Ni content was 1.43% by weight, which exceeded the range of the present invention, the creep rupture time was shortened.
【００４５】比較例No.１６はＣｒの含有量が１４．８
重量％と本発明の範囲を超えているため、吸収エネルギ
が判定基準よりも低く靭性が乏しかった。Comparative Example No. 16 has a Cr content of 14.8.
Since the content was wt%, which exceeded the range of the present invention, the absorbed energy was lower than the criterion and the toughness was poor.
【００４６】比較例No.１７はＭｏの含有量が０．００
６重量％でありＷの含有量が０．５８重量％と本発明の
範囲よりも低いため、吸収エネルギが判定基準よりも低
く靭性が乏しいと共に、クリープ破断時間が短くクリー
プ強度が劣った。比較例No.１８はＭｏの含有量が１．
３４重量％でありＷの含有量が３．８２重量％と本発明
の範囲を超えているため、吸収エネルギが判定基準より
も低く靭性が乏しかった。Comparative Example No. 17 has a Mo content of 0.00
Since it was 6% by weight and the W content was 0.58% by weight, which was lower than the range of the present invention, the absorbed energy was lower than the criterion and the toughness was poor, and the creep rupture time was short and the creep strength was poor. Comparative Example No. 18 had a Mo content of 1.
Since it was 34% by weight and the W content was 3.82% by weight, which was outside the range of the present invention, the absorbed energy was lower than the criterion and the toughness was poor.
【００４７】比較例No.１９はＶの含有量が０．０２重
量％でありＮｂの含有量が０．０１重量％と本発明の範
囲よりも低いため、クリープ破断時間が短くクリープ強
度が劣った。比較例No.２０はＶの含有量が０．５８重
量％でありＮｂの含有量が０．１７重量％と本発明の範
囲を超えているため、吸収エネルギが判定基準よりも低
く靭性が乏しかった。In Comparative Example No. 19, the V content was 0.02% by weight and the Nb content was 0.01% by weight, which was lower than the range of the present invention, and therefore the creep rupture time was short and the creep strength was poor. It was Comparative Example No. 20 has a V content of 0.58% by weight and an Nb content of 0.17% by weight, which is outside the range of the present invention, so that the absorbed energy is lower than the criterion and the toughness is poor. It was
【００４８】比較例No.２１はＮの含有量が０．００５
重量％を本発明の範囲を超えているため、吸収エネルギ
が判定基準よりも低く靭性が乏しいと共に、クリープ破
断時間が短くクリープ強度が乏しかった。比較例No.２
２はＮの含有量が０．１００重量％と本発明の範囲を超
えているため、溶接金属中に球状欠陥を生じ易くなり、
機械試験（シャルピー衝撃試験とクリープ破断試験）は
中止となった。In Comparative Example No. 21, the N content is 0.005.
Since the content of wt% exceeds the range of the present invention, the absorbed energy is lower than the criterion and the toughness is poor, and the creep rupture time is short and the creep strength is poor. Comparative example No. 2
No. 2 has a N content of 0.100% by weight, which exceeds the range of the present invention, so that spherical defects are likely to occur in the weld metal,
Mechanical tests (Charpy impact test and creep rupture test) were discontinued.
【００４９】比較例No.２３はＴｉの含有量が０．００
０５重量％と本発明の範囲よりも低いため、吸収エネル
ギが判定基準よりも低く靭性が乏しいと共に、クリープ
破断時間が短くクリープ強度が劣った。比較例No.２４
はＴｉの含有量が０．１０５重量％と本発明の範囲を超
えているため、吸収エネルギが判定基準よりも低く靭性
が乏しかった。Comparative Example No. 23 has a Ti content of 0.00
Since it was 05% by weight, which was lower than the range of the present invention, the absorbed energy was lower than the criterion and the toughness was poor, and the creep rupture time was short and the creep strength was poor. Comparative example No. 24
Since the Ti content was 0.105% by weight, which exceeded the range of the present invention, the absorbed energy was lower than the criterion and the toughness was poor.
【００５０】比較例No.２５はＣｏの含有量が０．５４
重量％と本発明の範囲よりも高く、Ｖの含有量が０．５
５重量％と本発明の範囲よりも高いため、強度が過多に
なり靭性が乏しくなった。Comparative Example No. 25 has a Co content of 0.54
%, Which is higher than the range of the present invention, and the V content is 0.5.
Since it is 5% by weight, which is higher than the range of the present invention, the strength becomes excessive and the toughness becomes poor.
【００５１】比較例No.２６はＣの含有量が０．１６重
量％と本発明の範囲を超え、かつＢの含有量が０．０１
１重量％と本発明の範囲を超えているため、高温割れが
発生し機械試験（シャルピー衝撃試験とクリープ破断試
験）が中止となった。Comparative Example No. 26 has a C content of 0.16% by weight, which is beyond the range of the present invention, and a B content of 0.01.
Since the content was 1% by weight, which exceeded the range of the present invention, high temperature cracking occurred and the mechanical test (Charpy impact test and creep rupture test) was stopped.
【００５２】比較例No.２７はＣｒの含有量が７．３６
重量％と本発明の範囲よりも低いため、クリープ破断時
間が短くクリープ強度が劣った。Comparative Example No. 27 had a Cr content of 7.36.
Since the weight percentage was lower than the range of the present invention, the creep rupture time was short and the creep strength was poor.
【００５３】比較例No.２８はＭｏの含有量が０．００
７重量％と本発明の範囲よりも低いため、クリープ破断
時間が短くクリープ強度が劣った。比較例No.２９はＭ
ｏの含有量が１．３４重量％と本発明の範囲を超えてい
るため、吸収エネルギが判定基準よりも低く靭性が乏し
かった。Comparative Example No. 28 has a Mo content of 0.00
Since it was 7% by weight, which was lower than the range of the present invention, the creep rupture time was short and the creep strength was poor. Comparative example No. 29 is M
Since the content of o was 1.34% by weight, which exceeded the range of the present invention, the absorbed energy was lower than the criterion and the toughness was poor.
【００５４】比較例No.３０はＷの含有量が０．６７重
量％と本発明の範囲よりも低いため、クリープ破断時間
が短くクリープ強度が劣った。比較例No.３１はＷの含
有量が３．７９重量％と本発明の範囲を超えているた
め、吸収エネルギが判定基準よりも低く靭性が乏しかっ
た。Comparative Example No. 30 had a W content of 0.67% by weight, which was lower than the range of the present invention, and therefore the creep rupture time was short and the creep strength was poor. Comparative Example No. 31 had a W content of 3.79% by weight, which was beyond the range of the present invention, and thus the absorbed energy was lower than the criterion and the toughness was poor.
【００５５】比較例No.３２はＮｂの含有量が０．０１
重量％と本発明の範囲よりも低いため、クリープ破断時
間が短くクリープ強度が劣った。比較例No.３３はＮｂ
の含有量が０．１７重量％と本発明の範囲を超えている
ため、吸収エネルギが判定基準よりも低く靭性が乏しか
った。Comparative Example No. 32 has a Nb content of 0.01
Since the weight percentage was lower than the range of the present invention, the creep rupture time was short and the creep strength was poor. Comparative example No. 33 is Nb
Content of 0.17% by weight, which exceeds the range of the present invention, the absorbed energy was lower than the criterion and the toughness was poor.
【００５６】比較例No.３４はＶの含有量が０．０２重
量％と本発明の範囲よりも低いため、クリープ破断時間
が短くクリープ強度が劣った。比較例No.３５はＶの含
有量が０．６２重量％と本発明の範囲を超えているた
め、吸収エネルギが判定基準よりも低く靭性が乏しかっ
た。Since the V content of Comparative Example No. 34 was 0.02% by weight, which was lower than the range of the present invention, the creep rupture time was short and the creep strength was poor. In Comparative Example No. 35, the V content was 0.62% by weight, which was beyond the range of the present invention, so the absorbed energy was lower than the criterion and the toughness was poor.
【００５７】[0057]
【発明の効果】以上詳述したように本発明においては、
靭性及びクリープ強度が優れた高Ｃｒフェライト系耐熱
鋼用ガスシールドアーク溶接ワイヤを提供することがで
きる。As described above in detail, in the present invention,
It is possible to provide a gas shielded arc welding wire for high Cr ferritic heat-resistant steel, which has excellent toughness and creep strength.
【００５８】また、この高Ｃｒフェライト系耐熱鋼用ガ
スシールドアーク溶接ワイヤは、高強度９乃至１２Ｃｒ
鋼等の母材と同程度のクリープ強度を有し常温で十分な
靭性を有するため、高強度９乃至１２Ｃｒ鋼等の溶接材
料として好適である。Further, this gas shielded arc welding wire for high Cr ferritic heat resistant steel has a high strength of 9 to 12 Cr.
Since it has a creep strength comparable to that of a base material such as steel and sufficient toughness at room temperature, it is suitable as a welding material for high-strength 9-12 Cr steel and the like.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B23K 35/30 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) B23K 35/30
Claims (2)
０．１５重量％、Ｓｉを０．１０乃至１．００重量％、
Ｍｎを０．３０乃至１．５０重量％、Ｃｕを０．０５乃
至２．０重量％、Ｎｉを０．０５乃至１．２０重量％、
Ｃｒを８乃至１３重量％、Ｍｏを０．０１乃至１．２０
重量％、Ｖを０．０３乃至０．５０重量％、Ｎｂを０．
０２乃至０．１５重量％、Ｗを０．８乃至３．５重量
％、Ｎを０．０１乃至０．０８重量％及びＴｉを０．０
００８乃至０．０９重量％を含有し、残部がＦｅ及び不
可避的不純物からなることを特徴とする高Ｃｒフェライ
ト系耐熱鋼用ガスシールドアーク溶接ワイヤ。1. A C content of 0.02 to 0.15% by weight and a Si content of 0.10 to 1.00% by weight based on the total weight of the wire.
0.30 to 1.50 wt% Mn, 0.05 to 2.0 wt% Cu, 0.05 to 1.20 wt% Ni,
8 to 13% by weight of Cr and 0.01 to 1.20 of Mo
% By weight, V 0.03 to 0.50% by weight, Nb 0.
02 to 0.15 wt%, W to 0.8 to 3.5 wt%, N to 0.01 to 0.08 wt% and Ti to 0.0
A gas-shielded arc welding wire for high Cr ferritic heat-resistant steel, characterized by containing 008 to 0.09% by weight, and the balance being Fe and inevitable impurities.
５重量％以下及びＢを０．０００５乃至０．００８重量
％を含有することを特徴とする請求項１に記載の高Ｃｒ
フェライト系耐熱鋼用ガスシールドアーク溶接ワイヤ。2. Co is further added to 0.4 per weight of the wire.
High Cr content according to claim 1, characterized in that it contains less than 5% by weight and 0.0005 to 0.008% by weight of B.
Gas shielded arc welding wire for ferritic heat resistant steel.
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|---|---|---|---|
| JP03490199A JP3375905B2 (en) | 1999-02-12 | 1999-02-12 | Gas shielded arc welding wire for high Cr ferritic heat resistant steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03490199A JP3375905B2 (en) | 1999-02-12 | 1999-02-12 | Gas shielded arc welding wire for high Cr ferritic heat resistant steel |
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|---|---|---|---|---|
| CN101862924A (en) * | 2010-06-30 | 2010-10-20 | 郑州机械研究所 | Gas shield welding wire material for supercritical steel |
| DK2896713T3 (en) * | 2014-01-16 | 2016-06-06 | Uddeholms Ab | Stainless steel and a cutting tool body made of stainless steel |
| CN112222679B (en) * | 2020-10-20 | 2022-04-22 | 天津市永昌焊丝有限公司 | Low-nickel high-strength high-toughness gas-shielded solid welding wire |
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1999
- 1999-02-12 JP JP03490199A patent/JP3375905B2/en not_active Expired - Lifetime
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| JP2000233294A (en) | 2000-08-29 |
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