JPS597555B2 - Spheroidal graphite cast iron welding wire - Google Patents
Spheroidal graphite cast iron welding wireInfo
- Publication number
- JPS597555B2 JPS597555B2 JP14007078A JP14007078A JPS597555B2 JP S597555 B2 JPS597555 B2 JP S597555B2 JP 14007078 A JP14007078 A JP 14007078A JP 14007078 A JP14007078 A JP 14007078A JP S597555 B2 JPS597555 B2 JP S597555B2
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- welding wire
- welding
- spheroidal graphite
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
- B23K35/302—Cu as the principal constituent
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Description
【発明の詳細な説明】
本発明は球状黒鉛鋳鉄の溶接に用いる溶接ワイヤに係り
、溶接ボンド部の硬度を低く抑え同部の割れ発生を少な
くできる新しい溶接ワイヤを提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding wire used for welding spheroidal graphite cast iron, and provides a new welding wire that can keep the hardness of the weld bond portion low and reduce the occurrence of cracks in the weld bond portion.
周知のように、球状黒鉛鋳鉄の溶接にはＦｅ−Ｎｉ合金
の溶接棒又は溶接ワイヤを用いるのが一般的であるが、
このＦｅ−Ｎｉ系のものでは高価なＮｉ含有量が高くコ
スト的に不利となる欠点と共に、溶接条件によつてはＦ
ｅ３Ｃが晶出してボンド部の硬度が高くなり、これによ
り依然として割れ感受性が高いといラ欠点を有するもの
であつた。As is well known, it is common to use Fe-Ni alloy welding rods or welding wires for welding spheroidal graphite cast iron.
This Fe-Ni type has the disadvantage of having a high Ni content, which is disadvantageous in terms of cost, and depending on the welding conditions, F
The e3C crystallized and increased the hardness of the bonded portion, which still had the drawback of high cracking susceptibility.
このような実情に鑑み、本発明では今度従来のＦｅ−Ｎ
ｉ系のものとは基本成分を全く異にするブロンズ系の溶
接合金を開発し、これにより溶接ワイヤの経済性を改善
すると共に、球状黒鉛鋳鉄の溶接ボンド部の硬度を低く
抑え、以つて溶接割れの発生を少なく出来る新しい溶接
ワイヤを提供したものであり、従つて本発明に係る球状
黒鉛鋳鉄の溶接ワイヤにおける特徴は、Ｃｕベースに、
５ｉ２〜５重量％を含有せしめて成る点にある。In view of these circumstances, in the present invention, the conventional Fe-N
We have developed a bronze-based welding alloy whose basic composition is completely different from that of the i-based alloy, thereby improving the economic efficiency of the welding wire and keeping the hardness of the welding bond of spheroidal graphite cast iron to a low level, thereby making it easier to weld. The present invention provides a new welding wire that can reduce the occurrence of cracks.Therefore, the features of the spheroidal graphite cast iron welding wire according to the present invention include Cu-based,
5i is contained in an amount of 2 to 5% by weight.
即ち、本発明に係る溶接ワイヤの基本成分は第１表に示
す通りである。第１表 溶接ワイヤ（重量ｑ６）
そこで、本発明に係るプロンズ系ワイヤの成分限定理由
について説明する。That is, the basic components of the welding wire according to the present invention are as shown in Table 1. Table 1 Welding wire (weight q6) Therefore, the reason for limiting the components of the pronz wire according to the present invention will be explained.
本発明ではＣｕをベースとするのであるが、ＣｕはＮｉ
と同様に鉄中に固溶してγ固溶限を広げる作用があり、
従つてこのＣｕベースのワイヤでは従来のＦｅ−Ｎｉ系
のものと同様に鋳鉄の溶接に対して良好な溶接性を具備
するものとなる。In the present invention, Cu is used as a base, but Cu is Ni.
Similarly, it dissolves in iron and has the effect of expanding the γ solid solubility limit.
Therefore, this Cu-based wire has good weldability for welding cast iron, similar to the conventional Fe--Ni wire.
次に本発明の溶接ワイヤでは、ＣｕベースにＳｉを適量
含有せしめるものであるが、ここでＳｉについてはその
脱酸効果により添加を要するものである。然し乍ら、Ｓ
ｉについてはあまり添加量を多くすると脆くなり、ワイ
ヤの線引加工が困難となるので、その効果を有効に発揮
させる適正範囲として、Ｓｉ２−５重量％に限定される
。以下本発明を具体的実施例に基き説明する。＜実施例
〉第２表に成分を記載する本発明の溶接ワイヤを用いて
、ＭＩＧ溶接法によりタグタイル鋳鉄溶接試験片をその
開先部で溶接した。Next, in the welding wire of the present invention, an appropriate amount of Si is contained in the Cu base, and Si needs to be added due to its deoxidizing effect. However, S
If the amount of i added is too large, it will become brittle and the wire will become difficult to draw, so the appropriate range for effectively exhibiting its effect is limited to 2-5% by weight of Si. The present invention will be explained below based on specific examples. <Example> Using the welding wire of the present invention whose components are listed in Table 2, a tag tile cast iron welding test piece was welded at its groove portion by the MIG welding method.
この試瞼片は、第１図に示す如く、全幅Ｔ，＝３００、
板厚ｔ一２０、溶接長さ１２＝２００ＷＩＳで開先角θ
二９０開先開口部の鉛直面高さｈ＝２１１Ｂの形態をな
すものである。ワイヤ径１．２φ、電流２４０Ａ１電圧
２５Ｖこの試験によつて得られたビード断面の硬度分布
を第２図に示し、又その引張試験結果及び顕微鏡組織を
第３表に示す。As shown in Fig. 1, this test eyelid piece has a total width T,=300,
Plate thickness t - 20, welding length 12 = 200 WIS, groove angle θ
The vertical height h of the 290 groove opening is 211B. Wire diameter: 1.2φ, current: 240 A, voltage: 25 V. The hardness distribution of the bead cross section obtained by this test is shown in FIG. 2, and the tensile test results and microscopic structure are shown in Table 3.
更に又、溶接境界部に卦ける成分組成を第４表に示す。
但し、Ｘ線マイクロアナライザーの分析結果による。Furthermore, Table 4 shows the composition of the components in the weld boundary.
However, this is based on the analysis results of an X-ray microanalyzer.
上記実施例の試瞼結果中、第２図によれば、本発明のブ
ロンズ系溶接ワイヤではいずれもそのビードの硬度が３
５０Ｈｖ以下にあり、従来のＦｅ−Ｎｉ系のものでは３
５０Ｈｖを越えるのと好対称なしているのが判る。According to FIG. 2, among the test results of the above examples, the bead hardness of all bronze welding wires of the present invention was 3.
It is below 50Hv, and the conventional Fe-Ni type is 3
It can be seen that there is a good contrast with the value exceeding 50Hv.
従つてこの結果からも明らかなように、本発明の溶接ワ
イヤを用いれば、ボンド部（ビード）の硬度が低く抑え
られ、その溶接割れの発生が防止できるものとなる。尚
、本発明の溶接ワイヤによるとボンド部の硬度が低くな
る理由としては、Ｆｅ−Ｓｉ−Ｃｕのフエライト固溶体
とＦｅ５ｓｉ３の金属間化合物とによる共晶組織を呈す
るためである。又、第３表の結果によれば、本発明の溶
接ワイヤを用いれば、その引張強度がいずれも３０ＫＩ
ｉ以上になつて卦り、普通鋳鉄以上の強度を有するもの
である。Therefore, as is clear from this result, by using the welding wire of the present invention, the hardness of the bond portion (bead) can be suppressed to a low level, and the occurrence of weld cracks can be prevented. The reason why the hardness of the bonded portion of the welding wire of the present invention is low is that it exhibits a eutectic structure composed of a ferrite solid solution of Fe-Si-Cu and an intermetallic compound of Fe5si3. Also, according to the results in Table 3, if the welding wire of the present invention is used, the tensile strength is 30 KI.
It has a strength greater than or equal to that of ordinary cast iron.
以上のように本発明の溶接ワイヤでは、従来のＦｅ−Ｎ
ｉ系のものとはその基本成分を全く異にし、Ｎｉをまつ
たく含有せずＳｉを含有ぜしめたブロンズ系のものであ
つて、その経済性が大巾に改善されると共に、実用的に
は十分な強度を有しかつボンド部の硬度を低下すること
により割れ発生を少なくすることに成功したものである
。As described above, in the welding wire of the present invention, the conventional Fe-N
Its basic composition is completely different from that of the i-series, and it is a bronze-based material that does not contain much Ni but contains Si. It has sufficient strength and has succeeded in reducing the occurrence of cracks by reducing the hardness of the bonded part.
従つて、推進リブの溶接、Ｓ．Ｓ形挿口リングの溶接等
のタグタール鋳鉄管の溶接をはじめとして、その他タグ
タール鋳鉄の溶接全般に本発明の溶接ワイヤを適用すれ
ば、著しい工業的メリツトを奏するものとなる。Therefore, welding of the propulsion rib, S. If the welding wire of the present invention is applied to welding tag tar cast iron pipes, such as welding S-shaped socket rings, and other general welding of tag tar cast iron, it will bring about significant industrial advantages.
第１図は本発明の実施例に供したタグメール鋳鉄の開先
形状を示す説明図であり、第２図は実施例に訃けるビー
ド硬度分布を示すグラフ図であり、第３図は同実施例に
よるビード断面の顕微鏡写真である。Fig. 1 is an explanatory diagram showing the groove shape of the tag mail cast iron used in the example of the present invention, Fig. 2 is a graph showing the bead hardness distribution in the example, and Fig. 3 is the same. It is a micrograph of the bead cross section by an Example.
Claims (1)
ることを特徴とする球状黒鉛鋳鉄の溶接ワイヤ。1. A welding wire made of spheroidal graphite cast iron, characterized by containing 2 to 5% by weight of Si in a Cu base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14007078A JPS597555B2 (en) | 1978-11-11 | 1978-11-11 | Spheroidal graphite cast iron welding wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14007078A JPS597555B2 (en) | 1978-11-11 | 1978-11-11 | Spheroidal graphite cast iron welding wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5564990A JPS5564990A (en) | 1980-05-16 |
| JPS597555B2 true JPS597555B2 (en) | 1984-02-18 |
Family
ID=15260262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14007078A Expired JPS597555B2 (en) | 1978-11-11 | 1978-11-11 | Spheroidal graphite cast iron welding wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS597555B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT7047U1 (en) * | 2003-10-02 | 2004-09-27 | Magna Steyr Powertrain Ag & Co | PROCESS FOR WELDING |
-
1978
- 1978-11-11 JP JP14007078A patent/JPS597555B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5564990A (en) | 1980-05-16 |
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