JP2892288B2 - Rail welding method by gas shielded arc welding method - Google Patents
Rail welding method by gas shielded arc welding methodInfo
- Publication number
- JP2892288B2 JP2892288B2 JP6241659A JP24165994A JP2892288B2 JP 2892288 B2 JP2892288 B2 JP 2892288B2 JP 6241659 A JP6241659 A JP 6241659A JP 24165994 A JP24165994 A JP 24165994A JP 2892288 B2 JP2892288 B2 JP 2892288B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- weight
- rail
- gas shielded
- shielded arc
- 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 - Fee Related
Links
- 238000003466 welding Methods 0.000 title claims description 114
- 238000000034 method Methods 0.000 title claims description 33
- 239000007787 solid Substances 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 description 23
- 238000005336 cracking Methods 0.000 description 17
- 230000004927 fusion Effects 0.000 description 13
- 239000007789 gas Substances 0.000 description 13
- 239000000203 mixture Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 230000007547 defect Effects 0.000 description 9
- 239000002893 slag Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000003832 thermite Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
- Machines For Laying And Maintaining Railways (AREA)
- Arc Welding In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鉄道等に使用されるレ
ールの溶接方法に関し、特にガスシールドアーク溶接法
を適用することが可能で、且つ高品質の溶接金属が得ら
れるガスシールドアーク溶接法によるレールの溶接方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for welding rails used in railways and the like, and more particularly, to gas shielded arc welding to which a gas shielded arc welding method can be applied and a high quality weld metal can be obtained. The present invention relates to a method for welding rails by a method.
【０００２】[0002]
【従来の技術】従来、このレールの溶接には、ガス溶
接、フラッシュ溶接、テルミット溶接又は被覆アーク溶
接棒を使用したエンクローズアーク溶接等が用いられて
いる。この中で、エンクローズアーク溶接は、ガス溶接
やフラッシュ溶接と比較してレールの移動及び加圧工程
が不要であるため、またテルミット溶接と比較して継手
性能が優れていることから、多用されている溶接方法で
ある。しかし、従来の被覆アーク溶接棒を用いたエンク
ローズアーク溶接は、溶接施工に多大な時間を要し、特
に時間的制約のあるレール交換では溶接時間の短縮が望
まれていた。2. Description of the Related Art Conventionally, gas welding, flash welding, thermit welding, enclosed arc welding using a covered arc welding rod, and the like have been used for welding such rails. Among them, enclosed arc welding is frequently used because it does not require rail moving and pressurizing steps as compared with gas welding or flash welding, and because it has superior joint performance compared to thermite welding. Is the welding method. However, conventional enclosed arc welding using a covered arc welding rod requires a great deal of time for welding, and it has been desired to reduce the welding time, especially in rail replacement with time constraints.
【０００３】一方、ソリッドワイヤを使用したガスシー
ルドアーク溶接法は、溶着性が優れていて、高能率の溶
接が可能である。しかし、レール母材は、耐摩耗性と強
度を得るため、炭素含有量を高くして高硬度となるよう
に設計されている。また、溶接材料においても、特公平
４−５１２７５号又は特公平４−５１２７７号のよう
に、炭素含有量が高い溶接用ワイヤが開発されている。
このように、炭素含有量が高い材料の溶接では、溶着金
属に高温割れが発生しやすく、特に溶け込みが深いガス
シールドアーク溶接法ではこれが顕著である。一般に、
炭素（Ｃ）含有量が高いレール母材の突合せ溶接等で
は、溶着金属に凝固割れが生じやすい。[0003] On the other hand, the gas shielded arc welding method using a solid wire has excellent weldability and enables highly efficient welding. However, the rail base material is designed to have high hardness by increasing the carbon content in order to obtain wear resistance and strength. As for welding materials, welding wires having a high carbon content, such as Japanese Patent Publication No. 4-51275 or Japanese Patent Publication No. 4-51277, have been developed.
As described above, when welding a material having a high carbon content, high temperature cracking is apt to occur in the deposited metal, and this is particularly remarkable in a gas shielded arc welding method in which penetration is deep. In general,
In butt welding or the like of a rail base material having a high carbon (C) content, solidification cracks easily occur in the deposited metal.
【０００４】更に、レールの溶接は図２に示されるよう
に狭開先内の溶接であり、ワイヤの狙い及び運棒等の自
由度が極めて小さく、底部から頭頂部において融合不良
が生じる危険性が高い。Further, as shown in FIG. 2, the welding of the rail is performed in a narrow groove, so that the degree of freedom in aiming the wire and the movement of the rod is extremely small, and there is a risk that poor fusion occurs from the bottom to the top. Is high.
【０００５】[0005]
【発明が解決しようとする課題】このような事情から、
レールの溶接施工法としては、溶接作業時間が短いもの
が望まれており、溶接材料としては、耐割れ性が優れ、
レールとして必要な耐摩耗性及び強度を有するものが要
望され、更に、溶接施工条件についても、溶着金属の凝
固割れを防止でき、且つ欠陥発生を起こしにくい条件が
必要とされていた。しかしながら、従来の溶接方法は、
このような要望を満足させることはできなかった。SUMMARY OF THE INVENTION Under such circumstances,
As a welding method for rails, a method that requires a short welding time is desired, and as a welding material, it has excellent crack resistance,
Rails that have the required wear resistance and strength are required, and welding conditions are also required to prevent solidification cracking of the deposited metal and to prevent defects from occurring. However, conventional welding methods are:
Such a request could not be satisfied.
【０００６】本発明はかかる問題点に鑑みてなされたも
のであって、溶接作業時間の短縮化のために溶接用ソリ
ッドワイヤを使用したガスシールドアーク溶接法の高溶
着性に着目し、溶接用ソリッドワイヤの組成及び溶接施
工条件を適切に定めることにより、ガスシールドアーク
溶接法により、レールとして優れた継手性能を得ること
ができるガスシールドアーク溶接によるレールの溶接方
法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 focuses on the high welding property of a gas shielded arc welding method using a solid wire for welding in order to shorten the welding operation time. It is an object of the present invention to provide a method of welding a rail by gas shielded arc welding that can obtain excellent joint performance as a rail by a gas shielded arc welding method by appropriately determining the composition of solid wire and welding conditions. .
【０００７】[0007]
【課題を解決するための手段】本発明に係るガスシール
ドアーク溶接法によるレールの溶接方法は、Ｃ；０．５
０〜０．７５重量％を含有する鋼材からなるレールをガ
スシールドアーク溶接法により溶接するレールの溶接方
法において、ワイヤ全重量に対する重量％で、Ｃ；０．
２５重量％以下、Ｓｉ；０．０５〜１．５０重量％、Ｍ
ｎ；０．５０〜２．５０重量％、Ｃｒ；０．８０〜４．
００重量％、Ｍｏ；０．０５〜２．００重量％を含有
し、Ｐ；０．０１５重量％以下、Ｓ；０．０１５重量％
以下に規制し、残部がＦｅ及び不可避的不純物からなる
ソリッドワイヤを使用し、ワイヤ径が１．２ｍｍのと
き、溶接電流；１８０〜２５０Ａ、溶接電圧；２６〜３
１Ｖ、ワイヤ径が１．４ｍｍのとき、溶接電流；２６０
〜３１０Ａ、溶接電圧；２７〜３３Ｖ、ワイヤ径が１．
６ｍｍのとき、溶接電流；３２０〜３８０Ａ、溶接電
圧；２９〜３５Ｖである溶接条件にて溶接すると共に、
レール頭頂部においてはパス間温度を４００℃〜７００
℃に管理し、且つ積層方法を１層当たり２パス以上とす
ることを特徴とする。The method of welding a rail by the gas shielded arc welding method according to the present invention is as follows.
In a rail welding method in which a rail made of a steel material containing 0 to 0.75% by weight is welded by a gas shielded arc welding method, C: 0% by weight based on the total weight of the wire.
25% by weight or less, Si: 0.05 to 1.50% by weight, M
n: 0.50 to 2.50% by weight, Cr: 0.80 to 4.
Mo: 0.05 to 2.00% by weight, P: 0.015% by weight or less, S: 0.015% by weight
When a solid wire consisting of Fe and unavoidable impurities is used and the wire diameter is 1.2 mm, welding current: 180 to 250 A, welding voltage: 26 to 3
1V, when the wire diameter is 1.4 mm, welding current; 260
~ 310A, welding voltage; 27 ~ 33V, wire diameter is 1.
At the time of 6 mm, the welding current is 320 to 380 A, and the welding voltage is 29 to 35 V.
At the top of the rail, the temperature between passes is 400 ° C to 700 ° C.
° C and the lamination method is two passes or more per layer.
【０００８】また、必要に応じて、Ｎｉ；２．００重量
％以下添加しても良い。更に、Ｔｉ；０．０３〜１．５
０重量％を添加しても良い。If necessary, Ni may be added in an amount of 2.00% by weight or less. Further, Ti: 0.03 to 1.5
0% by weight may be added.
【０００９】[0009]
【作用】以下、本発明の溶接対象となるレールのＣ（炭
素）含有量の限定理由及び本発明において使用するソリ
ッドワイヤの成分添加理由及び組成限定理由、並びに溶
接条件について説明する。The reasons for limiting the C (carbon) content of the rail to be welded in the present invention, the reasons for adding the components and the composition of the solid wire used in the present invention, and the welding conditions will be described below.
【００１０】（１）レールのＣ含有量；０．５０〜０．
７５重量％ レールのＣ含有量が０．５０重量％未満では、レールと
して必要最低限の耐摩耗性及び強度を得ることができな
い。また、Ｃ含有量が０．７５重量％を超えると、希釈
により溶着金属中のＣ含有量が過度に増加し、溶着金属
の耐高温割れ性が劣化する。このため、レールのＣ含有
量は０．５０〜０．７５重量％とする。(1) C content of the rail;
When the C content of the 75% by weight rail is less than 0.50% by weight, the required minimum wear resistance and strength of the rail cannot be obtained. On the other hand, if the C content exceeds 0.75% by weight, the C content in the weld metal excessively increases due to dilution, and the hot metal crack resistance deteriorates. For this reason, the C content of the rail is set to 0.50 to 0.75% by weight.
【００１１】（２）ソリッドワイヤの成分添加理由及び
組成限定理由Ｃ（炭素）；０．２５重量％以下 Ｃは溶着金属の硬度を向上させて耐摩耗性を向上させる
ために添加するが、レール母材の希釈による増加分を考
慮しなければならない。ソリッドワイヤのＣ含有量が
０．２５重量％を超えると、レール母材の希釈による増
加分を含め、溶着金属のＣ含有量が必要以上に多くなり
すぎて、溶着金属が著しく硬化すると共に、耐高温割れ
性が劣化する。このため、Ｃ含有量は０．２５重量％以
下とする。(2) Reasons for adding components of solid wire and reasons for limiting composition C (carbon): 0.25% by weight or less C is added in order to improve the hardness of the deposited metal and improve the wear resistance. The increase due to dilution of the base material must be taken into account. If the C content of the solid wire exceeds 0.25% by weight, the C content of the deposited metal becomes excessively large, including the increase due to the dilution of the rail base material, and the deposited metal is hardened remarkably. Hot cracking resistance deteriorates. For this reason, the C content is set to 0.25% by weight or less.
【００１２】Ｓｉ；０．０５〜１．５０重量％ Ｓｉは溶着金属のなじみ性及び耐ブローホール性を向上
させ、狭開先内溶接で生じやすい融合不良等の溶接欠陥
を防止する作用を有する。このような作用を得るために
は、Ｓｉ含有量は０．０５重量％以上含有する必要があ
る。 Si: 0.05 to 1.50% by weight Si has the effect of improving the conformability and blowhole resistance of the deposited metal and preventing welding defects such as poor fusion which are likely to occur in narrow groove welding. . In order to obtain such an effect, the Si content needs to be 0.05% by weight or more.
【００１３】一方、Ｓｉを１．５０重量％を超えて含有
すると、溶着金属が脆化して、耐高温割れ性が劣化す
る。このため、Ｓｉ含有量は０．０５〜１．５０重量％
とする。On the other hand, if the content of Si exceeds 1.50% by weight, the deposited metal becomes brittle and the hot cracking resistance deteriorates. Therefore, the Si content is 0.05 to 1.50% by weight.
And
【００１４】Ｍｎ；０．５０〜２．５０重量％ Ｍｎは溶着金属のなじみ性及び耐ブローホール性を向上
させ、狭開先内溶接で生じやすい融合不良等の溶接欠陥
を防止する作用を有する。このような作用を得るために
は、Ｍｎは０．５０重量％以上添加する必要がある。 Mn: 0.50 to 2.50% by weight Mn has the effect of improving the conformability and blowhole resistance of the deposited metal and preventing welding defects such as poor fusion which are likely to occur in narrow groove welding. . In order to obtain such an effect, it is necessary to add Mn by 0.50% by weight or more.
【００１５】一方、Ｍｎを２．５０重量％を超えて添加
すると、溶着金属が脆化して、耐高温割れ性が劣化す
る。このため、Ｍｎ含有量は０．５０〜２．５０重量％
とする。On the other hand, when Mn is added in excess of 2.50% by weight, the deposited metal is embrittled and the hot cracking resistance is deteriorated. Therefore, the Mn content is 0.50 to 2.50% by weight.
And
【００１６】Ｎｉ；２．００重量％以下 Ｎｉは溶着金属の延性を向上させるため、必要に応じて
添加してもよい。Ｎｉを添加する場合は、その含有量は
２．００重量％以下にすることが必要である。この上限
値を超えてＮｉを添加すると、耐高温割れ性が劣化する
と共に、硬度が低下し、レールとして必要な耐摩耗性も
得ることができない。このため、Ｎｉを添加する場合は
２．００重量％以下とする。 Ni: 2.00% by weight or less Ni may be added as necessary to improve the ductility of the deposited metal. When Ni is added, its content needs to be 2.00% by weight or less. If Ni is added in excess of this upper limit, the hot cracking resistance will deteriorate and the hardness will decrease, and the wear resistance required for the rail cannot be obtained. Therefore, when Ni is added, the content is set to 2.00% by weight or less.
【００１７】Ｃｒ；０．８０〜４．００重量％ Ｃｒは溶着金属の硬度を安定化する作用を有する。この
ような作用を得るためには、Ｃｒ含有量を０．８０重量
％以上とすることが必要である。 Cr: 0.80 to 4.00% by weight Cr has an effect of stabilizing the hardness of the deposited metal. In order to obtain such an effect, the Cr content needs to be 0.80% by weight or more.
【００１８】しかし、Ｃｒ含有量が４．００重量％を超
えると、溶着金属が硬化して、耐高温割れ性が劣化す
る。このため、Ｃｒ含有量は０．８０〜４．００重量％
とする。However, if the Cr content exceeds 4.00% by weight, the deposited metal is hardened and the hot cracking resistance deteriorates. Therefore, the Cr content is 0.80 to 4.00% by weight.
And
【００１９】Ｍｏ；０．０５〜２．００重量％ Ｍｏは、狭開先内溶接のように、各パスが多重熱サイク
ルを受けて、硬度が低下しやすいときに、この硬度低下
を防止する作用を有する。このため、Ｍｏを０．０５重
量％以上添加する。 Mo: 0.05 to 2.00% by weight Mo prevents this decrease in hardness when the hardness tends to decrease due to multiple heat cycles in each pass, as in narrow groove welding. Has an action. Therefore, Mo is added in an amount of 0.05% by weight or more.
【００２０】しかし、Ｍｏを２．００重量％を超えて添
加しても、性能上の改善効果が認められない。このた
め、Ｍｏ含有量は０．０５〜２．００重量％とする。However, even if Mo is added in excess of 2.00% by weight, no improvement in performance is observed. For this reason, the Mo content is 0.05 to 2.00% by weight.
【００２１】Ｐ；０．０１５重量％以下 ソリッドワイヤ中にＰを多量に含有していると、溶着金
属の耐高温割れ性が損なわれる。そこで、Ｐ含有量は
０．０１５重量％以下に規制する。 P: 0.015% by weight or less If a large amount of P is contained in the solid wire, the high temperature crack resistance of the deposited metal is impaired. Therefore, the P content is restricted to 0.015% by weight or less.
【００２２】Ｓ；０．０１５重量％以下 Ｓの含有も溶着金属の耐高温割れ性を損なうため、これ
を防止するために、Ｓ含有量は０．０１５重量％以下に
規制する。 S: 0.015% by weight or less The content of S also impairs the resistance to hot cracking of the deposited metal, so the S content is regulated to 0.015% by weight or less to prevent this.
【００２３】Ｔｉ；０．０３〜１．５０重量％ Ｔｉは脱酸剤としてソリッドワイヤ中に添加しても良
い。開先間隔が狭いか、又は溶接条件によりレール母材
が多く希釈される場合は、溶着金属のＣ含有量が増加
し、ＣがＯ（酸素）と結びつくことにより、ＣＯガスに
起因したブローホール等の溶接欠陥が生じるが、これを
防ぐためにＴｉを脱酸剤としてソリッドワイヤに添加し
ておくことが好ましい。このＴｉを添加する場合は、そ
の効果を得るために、０．０３重量％以上添加する必要
がある。 Ti: 0.03 to 1.50% by weight Ti may be added to the solid wire as a deoxidizing agent. If the groove interval is narrow or the rail base material is diluted due to welding conditions, the C content of the deposited metal increases, and C is combined with O (oxygen), thereby causing blowholes caused by CO gas. In order to prevent such welding defects, it is preferable to add Ti as a deoxidizing agent to the solid wire. When adding Ti, it is necessary to add 0.03% by weight or more to obtain the effect.
【００２４】Ｔｉ含有量が１．５０重量％を超えると、
スラグの発生量が増加して、スラグ巻き及び融合不良等
の溶接欠陥が発生する。このため、Ｔｉ含有量は０．０
３〜１．５０重量％にする。When the Ti content exceeds 1.50% by weight,
The amount of slag generated increases, and welding defects such as slag winding and poor fusion occur. Therefore, the Ti content is 0.0
3 to 1.50% by weight.
【００２５】（３）溶接条件溶接電流；ワイヤ径が１．２ｍｍのとき１８０〜２５０
Ａ、ワイヤ径が１．４ｍｍのとき２６０〜３１０Ａ、ワ
イヤ径が１．６ｍｍのとき３２０〜３８０Ａ 溶接電流が各ワイヤ径ごとの下限値より低いと、溶け込
みが浅すぎ、融合不良が生じる。一方、溶接電流が各ワ
イヤ径ごとの上限値を超えると、母材希釈が過大とな
り、レール鋼種によっては溶着金属中のＣ量が増加しす
ぎて、耐高温割れ性が劣化する。このため、溶接電流は
ワイヤ径が１．２ｍｍのとき、溶接電流；１８０〜２５
０Ａ、ワイヤ径が１．４ｍｍのとき、溶接電流；２６０
〜３１０Ａ、ワイヤ径が１．６ｍｍのとき、溶接電流；
３２０〜３８０Ａに設定する。(3) Welding conditions Welding current: 180 to 250 when wire diameter is 1.2 mm
A, 260-310A when the wire diameter is 1.4 mm,
When the ear current is 1.6 mm and the welding current of 320 to 380 A is lower than the lower limit for each wire diameter, the penetration is too shallow and poor fusion occurs. On the other hand, when the welding current exceeds the upper limit value for each wire diameter, the base metal dilution becomes excessive, and depending on the type of rail steel, the amount of C in the weld metal increases too much, and the hot cracking resistance deteriorates. Therefore, when the wire diameter is 1.2 mm, the welding current is 180 to 25;
0 A, when the wire diameter is 1.4 mm, welding current; 260
~ 310A, when the wire diameter is 1.6mm, welding current;
Set it to 320-380A.
【００２６】溶接電圧；ワイヤ径が１．２ｍｍのとき２
６〜３１Ｖ、ワイヤ径が１．４ｍｍのとき２７〜３３
Ｖ、ワイヤ径が１．６ｍｍのとき２９〜３５Ｖ 溶接電圧が各ワイヤ径ごとの下限値未満であると、ビー
ド形状不良になり、融合不良の原因となる。しかし、溶
接電圧が各ワイヤ径ごとの上限値を超えると、アークが
不安定となり、溶接欠陥が生じやすくなる。このため、
溶接電圧はワイヤ径が１．２ｍｍのとき、溶接電圧；２
６〜３１Ｖ、ワイヤ径が１．４ｍｍのとき、溶接電圧；
２７〜３３Ｖ、ワイヤ径が１．６ｍｍのとき、溶接電
圧；２９〜３５Ｖ２６〜３１Ｖに設定する。[0026]Welding voltage; 2 when wire diameter is 1.2 mm
6 to 31 V, 27 to 33 when the wire diameter is 1.4 mm
V, 29-35V when wire diameter is 1.6mm If the welding voltage is below the lower limit for each wire diameter,
This will result in poor shape and cause poor fusion. However,
If the contact voltage exceeds the upper limit for each wire diameter, an arc
It becomes unstable and welding defects are likely to occur. For this reason,
When the wire diameter is 1.2 mm, the welding voltage is 2;
6-31V, when the wire diameter is 1.4mm, welding voltage;
27-33V, when the wire diameter is 1.6mm,
Pressure: 29-35V 26-31V is set.
【００２７】頭頂部の積層方法及び層間温度 溶接ビードの最終凝固部にかかる収縮応力を緩和させる
と共に分散させるため、レール頭頂部においては、積層
方法を１層当たり２パス以上とする。これにより、高温
割れ（溶着金属の凝固割れ）を防止することができる。
また、１層当たり２パス以上の積層を行うことにより、
溶接欠陥（融合不良など）の防止も図ることができる。In order to alleviate and disperse the shrinkage stress applied to the final solidified portion of the interlayer bead and the interlayer temperature welding bead, the lamination method should be two passes or more per layer at the top of the rail. Thereby, hot cracking (solidification cracking of the deposited metal) can be prevented.
In addition, by stacking two or more passes per layer,
Welding defects (such as poor fusion) can also be prevented.
【００２８】また、本発明においてはレール頭頂部のパ
ス間温度を４００〜７００℃に管理する。このパス間温
度が４００℃未満であると、溶着金属にかかる収縮応力
が大きくなり、高温割れが生じやすい。また、パス間温
度が７００℃を超えると、レール母材の希釈が過大とな
り、溶着金属のＣ含有量が高くなって、高温割れが生じ
やすい。In the present invention, the inter-pass temperature at the top of the rail is controlled to 400 to 700 ° C. If the temperature between passes is less than 400 ° C., the shrinkage stress applied to the deposited metal increases, and hot cracking is likely to occur. On the other hand, if the interpass temperature exceeds 700 ° C., the rail base material is excessively diluted, the C content of the deposited metal increases, and hot cracking is likely to occur.
【００２９】[0029]
【実施例】以下、本発明の実施例について、その比較例
と比較して説明する。EXAMPLES Examples of the present invention will be described below in comparison with comparative examples.
【００３０】第１実施例 下記表１に示す化学組成を有するレールを、図２中に示
す寸法で配置して、下記表２に示す溶接条件にて溶接を
行った。頭頂部のパス間温度は図３中のＡで示す位置で
測定した。下記表３，４，５にはこのとき使用した実施
例及び比較例の溶接用ワイヤの化学組成、組合せた溶接
条件、及びレール継ぎ手の評価結果を示す。高温割れ、
融合不良、ブローホール及びスラグ巻き込み等の有無の
評価は、Ｘ線透過試験にて判断した。 First Example Rails having the chemical compositions shown in Table 1 below were arranged with dimensions shown in FIG. 2 and welding was performed under the welding conditions shown in Table 2 below. The interpass temperature at the top of the head was measured at the position indicated by A in FIG. Tables 3, 4, and 5 below show the chemical compositions of the welding wires of the examples and comparative examples used at this time, the combined welding conditions, and the evaluation results of the rail joints. Hot cracking,
Evaluation of poor fusion, presence of blowholes, slag entrainment, and the like was determined by an X-ray transmission test.
【００３１】[0031]
【表１】 [Table 1]
【００３２】[0032]
【表２】 但し、Ｐ欄は頭頂部の積層方法(ハ゜ス)（１層当たり）を示す。 [Table 2] However, the column P shows the lamination method (bath) (per layer) at the top.
【００３３】[0033]
【表３】 [Table 3]
【００３４】[0034]
【表４】 [Table 4]
【００３５】[0035]
【表５】 [Table 5]
【００３６】実施例１〜１８は、ワイヤ組成及び溶接条
件が本願発明の範囲に入るものであるから、高温割れ、
融合不良、ブローホール及びスラグ差し込み等の欠陥は
発生しなかった。In Examples 1 to 18, since the wire composition and welding conditions fall within the scope of the present invention, hot cracking,
No defects such as poor fusion, blowholes and slag insertion did not occur.
【００３７】これに対し、比較例１〜２２は、溶接条件
又はワイヤ組成が本願発明の範囲から外れるものである
ので、高温割れが発生するか、又は融合不良、ブローホ
ール及びスラグ巻き込み等が発生した。On the other hand, in Comparative Examples 1 to 22, since the welding conditions or the wire composition are out of the range of the present invention, high-temperature cracking occurs or poor fusion, blowholes and slag entrainment occur. did.
【００３８】第２実施例 前記表１に示す化学組成を有するレールを、図２中に示
す寸法で配置し、下記表６に示す溶接条件にて溶接を行
った。下記表７にはこのとき使用した溶接用ワイヤの化
学組成を示す。下記表８にはレール溶接継手の評価を示
す。高温割れ、融合不良ブローホール及びスラグ巻き込
み等の有無の評価は、Ｘ線透過試験にて判断した。スラ
グ巻き込み等の有無評価はＸ線透過試験にて判断した。 Second Example Rails having the chemical compositions shown in Table 1 were arranged in the dimensions shown in FIG. 2 and were welded under the welding conditions shown in Table 6 below. Table 7 below shows the chemical composition of the welding wire used at this time. Table 8 below shows the evaluations of the rail welded joint. The evaluation of the presence or absence of hot cracks, poor fusion blowholes, and slag entrapment was determined by an X-ray transmission test. Evaluation of the presence or absence of slag entrainment was determined by an X-ray transmission test.
【００３９】[0039]
【表６】 [Table 6]
【００４０】[0040]
【表７】 [Table 7]
【００４１】[0041]
【表８】 [Table 8]
【００４２】実施例１９，２０，２１，２２は、本発明
にて規定した条件を満足するものであり、比較例は本発
明の範囲から外れるものである。このため、表８に示す
ように、実施例１９，２０は高温割れ、融合不良、ブロ
ーホール及びスラグ差込みが発生しなかった。これに対
し、比較例２３，２４，２５．２６は、ワイヤ組成が本
発明の範囲から外れるものであるから融合不良等の溶接
欠陥が発生した。Examples 19, 20, 21, and 22 satisfy the conditions defined in the present invention, and comparative examples fall outside the scope of the present invention. For this reason, as shown in Table 8, in Examples 19 and 20, hot cracking, poor fusion, blow holes and slag insertion did not occur. On the other hand, in Comparative Examples 23, 24 and 25.26, since the wire composition was out of the range of the present invention, welding defects such as poor fusion occurred.
【００４３】[0043]
【発明の効果】以上説明したように、本発明は溶接用ソ
リッドワイヤを使用したガスシールドアーク溶接法によ
りレールを溶接することにより、その高溶着性という利
点を生かして溶接作業時間の短縮化を図ると共に、この
ソリッドワイヤの組成及び溶接施工条件を適切に設定す
ることにより、レールとして優れた継手性能を得ること
ができる。As described above, according to the present invention, the rail is welded by a gas shielded arc welding method using a solid wire for welding, thereby taking advantage of its high welding property to shorten the welding operation time. At the same time, by appropriately setting the composition of the solid wire and the welding conditions, excellent joint performance as a rail can be obtained.
【図１】レールの断面図である。FIG. 1 is a sectional view of a rail.
【図２】レールを突き合わせた開先部を示すレールの標
準的な側面図である。FIG. 2 is a standard side view of the rail showing the groove where the rail is butted.
【図３】（ａ），（ｂ）はレール頭頂部のパス間温度測
定位置を示すレールの断面図及び側面図である。FIGS. 3A and 3B are a cross-sectional view and a side view of the rail, respectively, showing a temperature measurement position between passes at the top of the rail;
１；底部 ２；腹部 ３；頭部 ４；頭頂部 ５；当金 1; bottom 2; abdomen 3; head 4; top 5;
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ２２Ｃ 38/22 Ｃ２２Ｃ 38/22 Ｅ０１Ｂ 29/42 Ｅ０１Ｂ 29/42 (72)発明者 夏目 松吾 神奈川県藤沢市宮前字裏河内100番１ 株式会社神戸製鋼所藤沢事業所内 (72)発明者 丸山 敏治 神奈川県藤沢市宮前字裏河内100番１ 株式会社神戸製鋼所藤沢事業所内 (72)発明者 山下 賢 神奈川県藤沢市宮前字裏河内100番１ 株式会社神戸製鋼所藤沢事業所内 (56)参考文献 特開 平６−320275（ＪＰ，Ａ) 特開 平４−118196（ＪＰ，Ａ) 特開 平３−294083（ＪＰ，Ａ) 特開 昭61−71185（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B23K 9/173 B23K 9/00 501 B23K 35/30 320 B23K 9/16 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI C22C 38/22 C22C 38/22 E01B 29/42 E01B 29/42 (72) Inventor Matsugo Natsume Matsuma-shi Urakawachi, Fujisawa-shi, Kanagawa Prefecture 100-1 Kobe Steel, Ltd.Fujisawa Works (72) Inventor Toshiharu Maruyama 100, Miyazaki, Fujisawa, Kanagawa Prefecture Urakawachi 100-1 Kobe Steel, Ltd.Fujisawa, Kanagawa Prefecture (72) Inventor, Ken Yamashita 100-1 Urakawachi Inside the Fujisawa Works of Kobe Steel, Ltd. (58) Fields investigated (Int. Cl. 6 , DB name) B23K 9/173 B23K 9/00 501 B23K 35/30 320 B23K 9/16
Claims (3)
る鋼材からなるレールをガスシールドアーク溶接法によ
り溶接するレールの溶接方法において、ワイヤ全重量に
対する重量％で、Ｃ；０．２５重量％以下、Ｓｉ；０．
０５〜１．５０重量％、Ｍｎ；０．５０〜２．５０重量
％、Ｃｒ；０．８０〜４．００重量％、Ｍｏ；０．０５
〜２．００重量％を含有し、Ｐ；０．０１５重量％以
下、Ｓ；０．０１５重量％以下に規制し、残部がＦｅ及
び不可避的不純物からなるソリッドワイヤを使用し、ワ
イヤ径が１．２ｍｍのとき、溶接電流；１８０〜２５０
Ａ、溶接電圧；２６〜３１Ｖ、ワイヤ径が１．４ｍｍの
とき、溶接電流；２６０〜３１０Ａ、溶接電圧；２７〜
３３Ｖ、ワイヤ径が１．６ｍｍのとき、溶接電流；３２
０〜３８０Ａ、溶接電圧；２９〜３５Ｖである溶接条件
にて溶接すると共に、レール頭頂部においてはパス間温
度を４００℃〜７００℃に管理し、且つ積層方法を１層
当たり２パス以上とすることを特徴とするガスシールド
アーク溶接法によるレールの溶接方法。In a rail welding method for welding a rail made of steel containing 0.50 to 0.75% by weight by a gas shielded arc welding method, C: 0% by weight based on the total weight of the wire. 25% by weight or less, Si;
0.5 to 1.50% by weight, Mn: 0.50 to 2.50% by weight, Cr: 0.80 to 4.00% by weight, Mo: 0.05
2.00% by weight, P: 0.015% by weight or less, S: 0.015% by weight or less, the balance being a solid wire composed of Fe and unavoidable impurities. .2 mm, welding current: 180 to 250
A, welding voltage: 26 to 31 V, when the wire diameter is 1.4 mm, welding current: 260 to 310 A, welding voltage: 27 to
33 V, when the wire diameter is 1.6 mm, welding current; 32
0 to 380 A, welding voltage: 29 to 35 V. Welding is performed under the welding conditions. At the top of the rail, the temperature between passes is controlled at 400 ° C. to 700 ° C., and the laminating method is two passes or more per layer. A rail welding method using a gas shielded arc welding method.
る鋼材からなるレールをガスシールドアーク溶接法によ
り溶接するレールの溶接方法において、ワイヤ全重量に
対する重量％で、Ｃ；０．２５重量％以下、Ｓｉ；０．
０５〜１．５０重量％、Ｍｎ；０．５０〜２．５０重量
％、Ｎｉ；２．００重量％以下、Ｃｒ；０．８０〜４．
００重量％、Ｍｏ；０．０５〜２．００重量％を含有
し、Ｐ；０．０１５重量％以下、Ｓ；０．０１５重量％
以下に規制し、残部がＦｅ及び不可避的不純物からなる
ソリッドワイヤを使用し、ワイヤ径が１．２ｍｍのと
き、溶接電流；１８０〜２５０Ａ、溶接電圧；２６〜３
１Ｖ、ワイヤ径が１．４ｍｍのとき、溶接電流；２６０
〜３１０Ａ、溶接電圧；２７〜３３Ｖ、ワイヤ径が１．
６ｍｍのとき、溶接電流；３２０〜３８０Ａ、溶接電
圧；２９〜３５Ｖである溶接条件にて溶接すると共に、
レール頭頂部においてはパス間温度を４００℃〜７００
℃に管理し、且つ積層方法を１層当たり２パス以上とす
ることを特徴とするガスシールドアーク溶接法によるレ
ールの溶接方法。2. A rail welding method for welding a rail made of steel containing 0.50 to 0.75% by weight by a gas shielded arc welding method, wherein C: 0. 25% by weight or less, Si;
0.5 to 1.50% by weight, Mn: 0.50 to 2.50% by weight, Ni: 2.00% by weight or less, Cr: 0.80 to 4.
Mo: 0.05 to 2.00% by weight, P: 0.015% by weight or less, S: 0.015% by weight
When a solid wire consisting of Fe and unavoidable impurities is used and the wire diameter is 1.2 mm, welding current: 180 to 250 A, welding voltage: 26 to 3
1V, when the wire diameter is 1.4 mm, welding current; 260
~ 310A, welding voltage; 27 ~ 33V, wire diameter is 1.
At the time of 6 mm, the welding current is 320 to 380 A, and the welding voltage is 29 to 35 V.
At the top of the rail, the temperature between passes is 400 ° C to 700 ° C.
C. and a lamination method of two passes or more per layer. A method for welding rails by gas shielded arc welding.
０３〜１．５０重量％を含有することを特徴とする請求
項１又は２に記載のガスシールドアーク溶接法によるレ
ールの溶接方法。3. The solid wire further comprises Ti;
The method for welding a rail by gas shielded arc welding according to claim 1 or 2, wherein the rail is contained in an amount of 03 to 1.50% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6241659A JP2892288B2 (en) | 1994-10-05 | 1994-10-05 | Rail welding method by gas shielded arc welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6241659A JP2892288B2 (en) | 1994-10-05 | 1994-10-05 | Rail welding method by gas shielded arc welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08108281A JPH08108281A (en) | 1996-04-30 |
| JP2892288B2 true JP2892288B2 (en) | 1999-05-17 |
Family
ID=17077613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6241659A Expired - Fee Related JP2892288B2 (en) | 1994-10-05 | 1994-10-05 | Rail welding method by gas shielded arc welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2892288B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5773779A (en) * | 1997-02-21 | 1998-06-30 | The Lincoln Electric Company | Method and system for welding railroad rails |
| WO2021221393A1 (en) * | 2020-04-28 | 2021-11-04 | 주식회사 포스코 | Welding wires for obtaining giga-grade welds, welded structures manufactured using same, and welding method thereof |
| KR102461165B1 (en) * | 2020-04-28 | 2022-11-03 | 주식회사 포스코 | Welding wires for obtaining giga-grade welds, welding structures manufactured using them, and their welding methods |
| KR20230040512A (en) * | 2021-09-16 | 2023-03-23 | 주식회사 포스코 | Wire for gas-shielded arc welding and welded member having excellent fatigue resistance properties and resistance to deformation due to residual stress of weld zone and method of manufacturing the same |
| JP2024037428A (en) * | 2022-09-07 | 2024-03-19 | 株式会社神戸製鋼所 | Solid wire and gas shield arc-welding method |
-
1994
- 1994-10-05 JP JP6241659A patent/JP2892288B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08108281A (en) | 1996-04-30 |
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|
| R371 | Transfer withdrawn |
Free format text: JAPANESE INTERMEDIATE CODE: R371 |