JPH0760483A - Welding wire for spheroidal graphite cast iron and steel - Google Patents
Welding wire for spheroidal graphite cast iron and steelInfo
- Publication number
- JPH0760483A JPH0760483A JP5213799A JP21379993A JPH0760483A JP H0760483 A JPH0760483 A JP H0760483A JP 5213799 A JP5213799 A JP 5213799A JP 21379993 A JP21379993 A JP 21379993A JP H0760483 A JPH0760483 A JP H0760483A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- cast iron
- graphite cast
- spheroidal graphite
- steel
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、球状黒鉛鋳鉄／鋼用
の溶接ワイヤに関するものである。さらに詳しくは、こ
の発明は、安価で、しかも良好な溶接を可能とする球状
黒鉛鋳鉄と鋼とのガスシールドアーク溶接用の溶接ワイ
ヤに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding wire for spheroidal graphite cast iron / steel. More specifically, the present invention relates to a welding wire for gas shielded arc welding of spheroidal graphite cast iron and steel that is inexpensive and enables good welding.
【０００２】[0002]
【従来の技術とその課題】球状黒鉛鋳鉄は、Ｍｇ等の添
加によって溶銑を処理し、黒鉛を球状に析出させたもの
であって、その特有の組織によって引張り強さが普通鋳
鉄の２倍以上という極めて優れた強度を有し、伸びや耐
摩耗性も大きく、しかも鋳鉄同様に被削性も良好である
という特徴を有している。2. Description of the Related Art Spheroidal graphite cast iron is obtained by treating hot metal by adding Mg or the like and precipitating graphite in a spherical shape, and its unique structure has a tensile strength more than twice that of ordinary cast iron. That is, it has extremely excellent strength, has large elongation and wear resistance, and has the same machinability as cast iron.
【０００３】この球状黒鉛鋳鉄は、各種部品としての製
造コストが鍛造品に比べて安価であって、これまでに
も、たとえばクランク軸や、エンジンライナー、歯車、
圧延ローラ、鋼塊鋳型等に使用されてきている。しかし
ながら、この黒鉛鋳鉄は溶接性が劣るため、その溶接は
限られた場合のみに行われ、しかも、たとえば巣埋め等
のやむを得ない溶接を行う場合には、高価な純Ｎｉ系、
あるいはＮｉ含有量が５０％以上にものぼるＦｅ−Ｎｉ
系材料を溶接ワイヤとして使用してきている。そして、
多くの場合、所定の溶接特性を得るためには、溶接に際
して予熱をしてきた。This spheroidal graphite cast iron is cheaper in manufacturing cost as various parts than a forged product, and has hitherto been, for example, a crankshaft, an engine liner, a gear,
It has been used for rolling rollers, steel ingot molds, etc. However, since this graphite cast iron has poor weldability, the welding is performed only in limited cases, and in the case of unavoidable welding such as burial, expensive pure Ni-based,
Or Fe-Ni with Ni content as high as 50% or more
The system material has been used as a welding wire. And
In many cases, preheating during welding has been performed in order to obtain desired welding characteristics.
【０００４】このような状況から、球状黒鉛鋳鉄につい
ての各種部品への応用は限られたものとなっていたが、
その強度やコストの点において魅力のある材料であっ
て、特に近年では、鋼との溶接構造体としての使用が期
待されていることから、従来の限界を克服し、安価で、
しかも良好な溶接性を実現することのできる、予熱不要
の新しい溶接ワイヤの実用化が望まれていた。Under these circumstances, the application of spheroidal graphite cast iron to various parts has been limited,
It is an attractive material in terms of its strength and cost, and since it is particularly expected to be used as a welded structure with steel in recent years, it overcomes the conventional limitations and is inexpensive.
Moreover, the practical application of a new welding wire that does not require preheating and that can achieve good weldability has been desired.
【０００５】この発明は、以上の通りの事情に鑑みてな
されたものであって、従来の溶接ワイヤの欠点を解消
し、安価で、しかも溶接構造体として期待されている球
状黒鉛鋳鉄と鋼との良好な溶接性を実現し、予熱を不要
ともすることのできる、新しい球状黒鉛鋳鉄／鋼用溶接
ワイヤを提供することを目的としている。The present invention has been made in view of the above circumstances, eliminates the drawbacks of the conventional welding wire, is inexpensive, and is a spheroidal graphite cast iron and steel expected as a welding structure. It is an object of the present invention to provide a new welding wire for spheroidal graphite cast iron / steel, which realizes excellent weldability and can eliminate the need for preheating.
【０００６】[0006]
【課題を解決するための手段】この発明は、上記の課題
を解決するものとして、化学組成が重量百分率で、 Ｃ：０．１５以下 Ｓｉ：０．３０〜２．００ Ｍｎ：０．５０〜３．００ Ｎｉ：１．００〜１０．００ Ｆｅ：残 部 からなり、不可避的不純物を含有することを特徴とする
球状黒鉛鋳鉄／鋼用溶接ワイヤを提供する。In order to solve the above problems, the present invention has a chemical composition in percentage by weight, C: 0.15 or less Si: 0.30 to 2.00 Mn: 0.50. A welding wire for spheroidal graphite cast iron / steel, which comprises 3.00 Ni: 1.00 to 10.00 Fe: balance and contains inevitable impurities.
【０００７】[0007]
【作用】この発明の溶接ワイヤは、Ｎｉを含有している
ものの、従来の純Ｎｉ系、あるいはＦｅ−Ｎｉ系の溶接
ワイヤとは本質的に異って、高価なＮｉの添加量を大幅
に低減し、安価で、しかも、上記の特定の成分組成を採
用することによって、これまでに知られていないほどの
良好な溶接性を、球状黒鉛鋳鉄と鋼との溶接において実
現する。Although the welding wire of the present invention contains Ni, it is essentially different from the conventional pure Ni-based or Fe-Ni-based welding wire in that the amount of expensive Ni added is greatly increased. By adopting the above-mentioned specific component composition, it is possible to achieve a weldability as good as heretofore unknown, in the welding of spheroidal graphite cast iron and steel.
【０００８】この発明の溶接ワイヤによって、球状黒鉛
鋳鉄中の炭素による溶接金属の硬化はあっても、予熱な
しで溶接可能となる。球状黒鉛鋳鉄と鋼との溶接は、上
記の組成の溶接ワイヤを用いて行うが、この場合、溶接
は、ＣＯ2 ガス、ＣＯ2 ガスとアルゴンガスとの混合ガ
ス等のシールドガスを用いたアーク溶接として行う。こ
の時、通常の直流電源や、パルス波形電源等の適宜な溶
接電源が採用される。With the welding wire of the present invention, even if the weld metal is hardened by the carbon in the spheroidal graphite cast iron, welding can be performed without preheating. Welding of the spheroidal graphite cast iron and steel is performed using a welding wire of the composition, but in this case, welding arc with CO 2 gas, shielding gas of mixed gas of CO 2 gas and argon gas Perform as welding. At this time, an appropriate welding power source such as a normal DC power source or a pulse waveform power source is adopted.
【０００９】溶接ワイヤとしての組成は、以下の理由に
よって規定されている。 Ｃ（炭素）：所定の強度を得るために必須のものであっ
て、０．１５％を超える場合には溶接金属の割れが生じ
やすくなるため、その割合は、０．１５％以下とする。 Ｓｉ：脱酸成分として作用し、炭素の移動を抑制して所
要の溶接特性を実現するためのものである。０．３０％
未満の場合には脱酸不足でブローホールが生成し、ま
た、２．００％を超える場合には、脆化する。このた
め、０．３０〜２．００％の範囲とする。The composition of the welding wire is defined by the following reasons. C (carbon): Indispensable for obtaining a predetermined strength, and if it exceeds 0.15%, cracking of the weld metal is likely to occur, so the ratio is made 0.15% or less. Si: It acts as a deoxidizing component and suppresses the movement of carbon to realize the required welding characteristics. 0.30%
If it is less than 0.25%, blowholes are formed due to insufficient deoxidation, and if it exceeds 2.00%, embrittlement occurs. Therefore, the range is 0.30 to 2.00%.
【００１０】Ｍｎ：脱酸成分として作用するが、０．５
％未満の場合には脱酸不足となり、また、３．０％を超
える場合には、残留オーステナイトが増大するため好ま
しくない。このため、Ｍｎは、０．５〜３．０％とす
る。 Ｎｉ：延性増大に欠かせないが、１．０％未満では延性
不足となり、１０．０％を超える場合には、高価なＮｉ
によってコストアップとなり、また、延性増大の効果は
見られない。従って、Ｎｉは１．０〜１０．０％とす
る。Mn: acts as a deoxidizing component, but is 0.5
If it is less than%, deoxidation becomes insufficient, and if it exceeds 3.0%, retained austenite increases, which is not preferable. Therefore, Mn is set to 0.5 to 3.0%. Ni: Indispensable for increasing ductility, but if it is less than 1.0%, ductility becomes insufficient, and if it exceeds 10.0%, expensive Ni.
This increases the cost, and the effect of increasing ductility is not seen. Therefore, Ni is set to 1.0 to 10.0%.
【００１１】以下、実施例を示し、さらに詳しくこの発
明の溶接ワイヤについて説明する。The welding wire of the present invention will be described in more detail below with reference to examples.
【００１２】[0012]
【実施例】溶接母材として、次の表１の組成を有する球
状黒鉛鋳鉄と鋼とを用いた。EXAMPLES Spheroidal graphite cast iron having the composition shown in Table 1 below and steel were used as welding base materials.
【００１３】[0013]
【表１】 [Table 1]
【００１４】また、溶接ワイヤとして、次の表２の組成
を有するものを、同様に表２に示した比較例組成のワイ
ヤとともに使用した。ワイヤの寸法は、各々１．２ｍｍ
径とした。A welding wire having the composition shown in Table 2 below was also used together with a wire having the composition of the comparative example shown in Table 2. Wire dimensions are 1.2 mm each
The diameter.
【００１５】[0015]
【表２】 [Table 2]
【００１６】溶接は、母材としての厚さ２０ｍｍの球状
黒鉛鋳鉄の片側を深さ２．６ｍｍ、巾１５ｍｍに研削
し、２．６ｍｍ厚の母材鋼に重ね突合わせし（ルートギ
ャップ０）、トーチの狙いはセンター（垂直）とし、予
熱なしで行った。この時のシールドガスは、ＣＯ2 およ
びＡｒ＋２０％ＣＯ2 ２０ｌ／ｍｉｎとした。また、溶
接電源としては、ＣＯ2 ガスの場合は直流電源、Ａｒ＋
２０％ＣＯ2 の場合はパルス電源を採用した。この溶接
による電流、電圧、速度は表３に示した。溶接後の割
れ、溶接部の硬さについて評価し、その結果を、同様に
表３に示した。For welding, one side of a spheroidal graphite cast iron having a thickness of 20 mm as a base material is ground to a depth of 2.6 mm and a width of 15 mm, and butt-bonded to a base material steel having a thickness of 2.6 mm (root gap 0). , The torch was aimed at the center (vertical), and it was done without preheating. At this time, the shielding gas was CO 2 and Ar + 20% CO 2 20 l / min. As the welding power source, in the case of CO 2 gas, a direct current power source, Ar +
In the case of 20% CO 2, a pulse power source was adopted. The current, voltage, and speed of this welding are shown in Table 3. The cracks after welding and the hardness of the welded portion were evaluated, and the results are also shown in Table 3.
【００１７】[0017]
【表３】 [Table 3]
【００１８】この表３の結果から明らかなように、この
発明の溶接ワイヤの場合には、割れは全く確認されず、
良好であった。一方、比較例の場合には、割れが見ら
れ、好ましいものではなかった。As is clear from the results shown in Table 3, no cracking was confirmed in the case of the welding wire of the present invention.
It was good. On the other hand, in the case of the comparative example, cracking was observed, which was not preferable.
【００１９】[0019]
【発明の効果】以上詳しく説明した通り、この発明によ
って、安価なワイヤ材料で、しかも割れのない良好な球
状黒鉛鋳鉄と鋼との溶接が得られる。As described in detail above, according to the present invention, it is possible to obtain good welding of spheroidal graphite cast iron and steel which is inexpensive and has no crack.
Claims (1)
球状黒鉛鋳鉄／鋼用溶接ワイヤ。1. A chemical composition, in weight percentage, C: 0.15 or less Si: 0.30 to 2.00 Mn: 0.50 to 3.00 Ni: 1.00 to 10.00 Fe: The balance A welding wire for spheroidal graphite cast iron / steel, which contains unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5213799A JPH0760483A (en) | 1993-08-30 | 1993-08-30 | Welding wire for spheroidal graphite cast iron and steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5213799A JPH0760483A (en) | 1993-08-30 | 1993-08-30 | Welding wire for spheroidal graphite cast iron and steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0760483A true JPH0760483A (en) | 1995-03-07 |
Family
ID=16645241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5213799A Pending JPH0760483A (en) | 1993-08-30 | 1993-08-30 | Welding wire for spheroidal graphite cast iron and steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0760483A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418885A (en) * | 2013-07-19 | 2013-12-04 | 燕山大学 | Method of enhancing surface hardness of ferrite nodular cast iron |
| US9821401B2 (en) | 2011-01-28 | 2017-11-21 | Exxonmobil Upstream Research Company | High toughness weld metals with superior ductile tearing resistance |
| WO2018036130A1 (en) * | 2016-08-26 | 2018-03-01 | 常州华德机械有限公司 | Process method for welding low-temperature ductile iron and manganese steel plate |
-
1993
- 1993-08-30 JP JP5213799A patent/JPH0760483A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9821401B2 (en) | 2011-01-28 | 2017-11-21 | Exxonmobil Upstream Research Company | High toughness weld metals with superior ductile tearing resistance |
| CN103418885A (en) * | 2013-07-19 | 2013-12-04 | 燕山大学 | Method of enhancing surface hardness of ferrite nodular cast iron |
| WO2018036130A1 (en) * | 2016-08-26 | 2018-03-01 | 常州华德机械有限公司 | Process method for welding low-temperature ductile iron and manganese steel plate |
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