JP2648791B2 - Wear resistant welded steel pipe - Google Patents
Wear resistant welded steel pipeInfo
- Publication number
- JP2648791B2 JP2648791B2 JP16409393A JP16409393A JP2648791B2 JP 2648791 B2 JP2648791 B2 JP 2648791B2 JP 16409393 A JP16409393 A JP 16409393A JP 16409393 A JP16409393 A JP 16409393A JP 2648791 B2 JP2648791 B2 JP 2648791B2
- Authority
- JP
- Japan
- Prior art keywords
- wear
- resistant
- steel sheet
- seam
- pipe
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、耐摩耗性クラッド鋼板
を用いた耐摩耗性溶接鋼管に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wear-resistant welded steel pipe using a wear-resistant clad steel sheet.
【０００２】[0002]
【従来の技術】従来よりセメント、コークス等の固体流
動物の搬送には、内面に耐摩耗性金属を持つ鋼管が使用
されている。この鋼管は、通常図１（Ａ）（Ｂ）に示す
方法で製造される。2. Description of the Related Art Conventionally, a steel pipe having an abrasion-resistant metal on its inner surface has been used for transporting a solid fluid such as cement or coke. This steel pipe is usually manufactured by a method shown in FIGS.
【０００３】図１（Ａ）では、母材鋼板１１の表面全体
に耐摩耗性金属１２を肉盛した耐摩耗性クラッド鋼板１
０を、耐摩耗性金属１２を内側にして半円形に曲げ成形
し、これを２つ突き合わせて突き合わせ部を溶接するこ
とにより管１となす。製造された管１は短く、通常は管
軸方向に溶接により継ぎ足されて製品とされる。FIG. 1A shows a wear-resistant clad steel sheet 1 in which a wear-resistant metal 12 is built up over the entire surface of a base steel sheet 11.
No. 0 is formed into a semicircular shape with the wear-resistant metal 12 inside, and the two are joined to each other and the butted portion is welded to form the tube 1. The manufactured pipe 1 is short, and is usually added by welding in the pipe axis direction to obtain a product.
【０００４】図１（Ｂ）では、耐摩耗性クラッド鋼板１
０を円形に曲げ成形し、その突き合わせ部を溶接して管
１となす。図１（Ａ）の方法が成形ロールにより曲げ加
工が困難な小径管の製造に適用されるのに対し、図１
（Ｂ）の方法は成形ロールによる曲げ加工が容易な比較
的大径の管の製造に使用される。In FIG. 1B, a wear-resistant clad steel sheet 1 is shown.
0 is bent into a circular shape, and the butted portion is welded to form a tube 1. While the method of FIG. 1A is applied to the production of small diameter pipes that are difficult to bend by a forming roll, FIG.
The method (B) is used for producing a pipe having a relatively large diameter which can be easily bent by a forming roll.
【０００５】このような方法で製造された耐摩耗性溶接
鋼管は、セメント工場でのクリンカー、製鉄所での焼結
鉱、コークスおよび石炭、石炭火力発電所でのフラィア
ッシュ等の空気搬送やスラリー搬送に使用される。その
場合、問題となるのは溶接継目の摩耗である。[0005] The wear-resistant welded steel pipe manufactured by such a method is used to transport air or slurry such as clinker at a cement plant, sinter ore, coke and coal at an ironworks, and fly ash at a coal-fired power plant. Used for In that case, the problem is the wear of the weld seam.
【０００６】[0006]
【発明が解決しようとする課題】図１（Ａ）（Ｂ）の方
法で製造された耐摩耗性溶接鋼管は、円周方向の鋼板端
縁を溶接して出来る継目２と、管端同士、即ち鋼板の側
縁同士を溶接して出来る継目３の２種類の溶接継目を持
つ。鋼板の端縁を溶接して出来る継目２は、管軸に平行
となり、側縁を接合して出来る継目３は管軸に直角とな
る。The wear-resistant welded steel pipe manufactured by the method shown in FIGS. 1A and 1B has a seam 2 formed by welding circumferential edges of a steel sheet, and pipe ends. That is, it has two types of welded seams, that is, a seam 3 formed by welding side edges of a steel plate. The seam 2 formed by welding the edges of the steel plate is parallel to the tube axis, and the seam 3 formed by joining the side edges is perpendicular to the tube axis.
【０００７】溶接継目の摩耗は、鋼板の端面を溶接して
出来る継目２で著しく、そのため、少なくともこの継目
２では、耐摩耗性金属１２を耐摩耗性溶接材料で相互に
溶接しておく必要がある。[0007] The wear of the welding seam is remarkable at the seam 2 formed by welding the end faces of the steel plates. Therefore, at least at the seam 2, it is necessary to weld the wear-resistant metal 12 to each other with a wear-resistant welding material. is there.
【０００８】しかしながら、耐摩耗性金属１２は管内面
側に位置しており、製造工程でこれを溶接することは非
常に難しい。製造工程で耐摩耗性金属１２を溶接せずに
放置した場合は、使用中に継目２が選択摩耗を受け、そ
の補修が必要となる。この補修は管内に人が入ることの
できる大径管の場合にのみ可能であり、管内に人が入る
ことができない小径管の場合はこの補修すらもできず、
継目２以外の部分が殆ど摩耗を生じていない状態である
にもかかわらず、管全体の交換を余儀なくされ、著しい
不経済を招く。However, the wear-resistant metal 12 is located on the inner side of the pipe, and it is very difficult to weld it in the manufacturing process. If the wear-resistant metal 12 is left without welding in the manufacturing process, the seam 2 undergoes selective wear during use, and its repair is required. This repair is only possible for large diameter pipes where people can enter the pipe, even for small diameter pipes where people cannot enter the pipe, this repair is not possible,
Although the parts other than the seam 2 are hardly abraded, the entire pipe must be replaced, resulting in significant uneconomical costs.
【０００９】本発明の目的は、製造が容易で、なお且つ
継目の選択摩耗が少ない耐摩耗性溶接鋼管を提供するこ
とにある。An object of the present invention is to provide a wear-resistant welded steel pipe which is easy to manufacture and has less selective wear of the seam.
【００１０】[0010]
【課題を解決するための手段】本発明の第１の耐摩耗性
溶接鋼管は、母材鋼板に耐摩耗性金属をクラッドした耐
摩耗性クラッド鋼板を、耐摩耗性金属を内側にして管状
に成形し、その円周方向の鋼板端縁を相互に溶接接合し
てなる耐摩耗性溶接鋼管において、前記耐摩耗クラッド
鋼板の端縁溶接が母材鋼板のみに施され、且つ、その溶
接継目が管中心に平行な線に対して１５度以上７０度以
下の角度で傾斜していることを特徴とする。SUMMARY OF THE INVENTION A first wear-resistant welded steel pipe of the present invention is made of a wear-resistant clad steel sheet in which a wear-resistant metal is clad on a base steel sheet and formed into a tubular shape with the wear-resistant metal inside. In a wear-resistant welded steel pipe formed by forming and welding the circumferential steel sheet edges to each other, the edge welding of the wear-resistant clad steel sheet is performed only on the base material steel sheet, and the welding seam is formed. It is characterized by being inclined at an angle of 15 degrees or more and 70 degrees or less with respect to a line parallel to the center of the tube.
【００１１】本発明の第２の耐摩耗性溶接鋼管は、母材
鋼板に耐摩耗性金属をクラッドした帯状の耐摩耗性クラ
ッド鋼板を、耐摩耗金属を内側にしてスパイラル状に巻
くことにより管状となし、その管軸方向の鋼板側縁同士
を相互に溶接してなる耐摩耗性溶接鋼管において、前記
耐摩耗クラッド鋼板の側縁溶接が母材鋼板のみに施され
ていることを特徴とする。The second wear-resistant welded steel pipe of the present invention is formed by winding a strip-shaped wear-resistant clad steel sheet in which a wear-resistant metal is clad on a base steel sheet in a spiral shape with the wear-resistant metal inside. In a wear-resistant welded steel pipe obtained by welding side edges of steel plates in the pipe axis direction to each other, the side edge welding of the wear-resistant clad steel plate is performed only on the base material steel plate. .
【００１２】[0012]
【作用】本発明の第１の耐摩耗性溶接鋼管では、耐摩耗
性クラッド鋼板の端縁を溶接して出来る継目で、管内面
側の耐摩耗性金属の溶接を省略したので、管内溶接が不
要になる。しかもその継目を、管中心に平行な線に対し
て１５度以上７０度以下の角度で傾斜させたので、管内
面側の耐摩耗性金属の溶接が省略されているにもかかわ
らず、その継目の摩耗を抑えることができる。In the first wear-resistant welded steel pipe of the present invention, welding of the wear-resistant metal on the inner surface side of the pipe is omitted at the seam formed by welding the edges of the wear-resistant clad steel sheet. It becomes unnecessary. Moreover, since the joint is inclined at an angle of 15 to 70 degrees with respect to a line parallel to the center of the pipe, the welding of the wear-resistant metal on the inner surface of the pipe is omitted even though the welding is omitted. Wear can be suppressed.
【００１３】即ち、本発明者は、多くの経験から、固体
流動物の搬送で生じる耐摩耗性金属の継目摩耗について
は、その流動方向に直角な継目は、溶接なしでも摩耗を
受け難いことを確認している。そして、この経験から、
耐摩耗性溶接鋼管では、鋼板の端縁を溶接して出来る継
目を、管中心に平行な線に対して傾斜させれば、継目で
の耐摩耗性金属の溶接を省略しても、継目の選択摩耗が
抑制されることを知見した。その傾斜角は１５度以上７
０度以下が適当である。１５度未満では継目の選択摩耗
が進み、７０度を超えると製管が困難になる。望ましい
傾斜角は３０度以上、更に望ましくは４５度以上であ
る。In other words, the inventor of the present invention has learned from many experiences that, with regard to the seam wear of a wear-resistant metal caused by the transport of a solid fluid, a seam perpendicular to the flow direction is hardly abraded without welding. I have confirmed. And from this experience,
In abrasion-resistant welded steel pipes, if the seam formed by welding the edges of the steel plate is inclined with respect to a line parallel to the pipe center, even if welding of the wear-resistant metal at the seam is omitted, the seam It has been found that selective wear is suppressed. The inclination angle is more than 15 degrees and 7
0 degrees or less is appropriate. If it is less than 15 degrees, the selective abrasion of the seam proceeds, and if it exceeds 70 degrees, it becomes difficult to form a pipe. A desirable inclination angle is 30 degrees or more, and more preferably 45 degrees or more.
【００１４】本発明の第２の耐摩耗性溶接鋼管は、所謂
スパイラル管である。スパイラル管では、鋼板の側縁が
相互に溶接される。この溶接継目は管中心に平行な線に
対して傾斜する。この傾斜角度は通常４５〜８０度で、
１５度を下回ることはない。従って、鋼板の側縁を接合
して出来る継目では、管内面側の耐摩耗性金属の溶接を
省略しても、その摩耗を抑えることができる。これを実
行したのが本発明の第２の耐摩耗性溶接鋼管であり、鋼
板の側縁の溶接に際して耐摩耗性金属の溶接を省略する
ことにより、管内溶接が不要となり、製造工数の大幅削
減が達成される。[0014] The second wear-resistant welded steel pipe of the present invention is a so-called spiral pipe. In spiral tubes, the side edges of the steel plates are welded together. This weld seam is inclined with respect to a line parallel to the pipe center. This inclination angle is usually 45 to 80 degrees,
No less than 15 degrees. Therefore, in the joint formed by joining the side edges of the steel plate, even if welding of the wear-resistant metal on the inner surface side of the pipe is omitted, the wear can be suppressed. This is achieved by the second wear-resistant welded steel pipe of the present invention. By omitting the welding of the wear-resistant metal when welding the side edges of the steel sheet, welding in the pipe becomes unnecessary, and the number of manufacturing steps is greatly reduced. Is achieved.
【００１５】なお、鋼板の端縁を溶接して出来る継目、
即ち鋼板の継手部については、鋼板がオープンの状態で
溶接が行われ、溶接作業が容易であるので、耐摩耗性金
属の溶接を特に省略する必要はない。ただし、その溶接
を省略した場合は、その継目を管中心に平行な線に対し
て１５〜７０度の角度で傾斜させる。そうしないと継目
が選択摩耗される。[0015] A seam formed by welding the edges of the steel sheet,
That is, welding is performed on the joint portion of the steel plate in a state where the steel plate is open, and the welding operation is easy. Therefore, it is not particularly necessary to omit welding of the wear-resistant metal. However, when the welding is omitted, the joint is inclined at an angle of 15 to 70 degrees with respect to a line parallel to the pipe center. Otherwise, the seam will be selectively worn.
【００１６】[0016]
【実施例】以下に本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１７】図２の耐摩耗性溶接鋼管は、本発明の第１
の耐摩耗性溶接鋼管に属し、短冊状の耐摩耗性クラッド
鋼板１０を使用して製造される。FIG. 2 shows a first embodiment of the present invention.
And is manufactured using a strip-shaped wear-resistant clad steel plate 10.
【００１８】耐摩耗性クラッド鋼板１０は、母材鋼板の
表面全体に耐摩耗性金属を薄く肉盛したものであり、そ
の両端縁１０ａ，１０ａは、両側縁１０ｂ，１０ｂに直
角な線Ｌ0 に対して傾斜している。その傾斜角γは１５
〜７０度である。The wear-resistant clad steel sheet 10 is formed by thinly coating a wear-resistant metal on the entire surface of a base steel sheet, and both end edges 10a, 10a have a line L 0 perpendicular to both side edges 10b, 10b. Inclined to The inclination angle γ is 15
~ 70 degrees.
【００１９】製造工程では、まず耐摩耗性クラッド鋼板
１０の耐摩耗性金属を内側とし、長手方向を円周方向と
して、耐摩耗性クラッド鋼板１０を円形に成形する。そ
して、端縁１０ａ，１０ａを溶接して管１となす。更
に、管１を軸方向に溶接して製品となす。ここで、溶接
は、図３に示すように、管の外側から母材鋼板１１に対
してのみ行い、管内面側に位置する耐摩耗性金属１２に
対しては、溶接を行わない。In the manufacturing process, first, the wear-resistant clad steel plate 10 is formed in a circular shape with the wear-resistant metal of the wear-resistant clad steel plate 10 inside and the longitudinal direction as the circumferential direction. Then, the edges 10a, 10a are welded to form the pipe 1. Further, the pipe 1 is welded in the axial direction to form a product. Here, as shown in FIG. 3, welding is performed only on the base steel plate 11 from the outside of the tube, and is not performed on the wear-resistant metal 12 located on the inner surface side of the tube.
【００２０】製造された耐摩耗性溶接鋼管は、鋼板の端
縁を接合して出来る継目２と、鋼板の側縁を接合して出
来る継目３とを持つ。前者の継目２は、管表面を通る管
中心に平行な線Ｌに対して傾斜し、その角度γは１５〜
７０度となる。よって、この継目は内面側の耐摩耗性金
属が溶接されていないにもかかわらず選択摩耗が少な
い。後者の継面３は線Ｌに対して直交し、管内を流通す
る搬送物の移動方向に直交するので、やはり耐摩耗性金
属の溶接か省略されているにもかかわらず選択摩耗が少
ない。The manufactured wear-resistant welded steel pipe has a seam 2 formed by joining the edges of the steel sheet and a seam 3 formed by joining the side edges of the steel sheet. The former seam 2 is inclined with respect to a line L parallel to the center of the tube passing through the surface of the tube, and its angle γ is 15 to
70 degrees. Therefore, this seam has less selective wear even though the wear-resistant metal on the inner surface side is not welded. Since the latter joint surface 3 is orthogonal to the line L and orthogonal to the moving direction of the conveyed object flowing in the pipe, the selective wear is small even though the welding of the wear-resistant metal is omitted.
【００２１】継目のギャップは、前者の継目２のギャッ
プＧについては１５度≦γ＜３５度の場合は０＜Ｇ≦2.
５ｍｍが望ましく、３５度≦γ≦７０度の場合は０＜Ｇ
≦4.５ｍｍが望ましい。即ち、傾斜角γが大きくなるほ
ど大きなギャップＧを許容できる。後者の継目３のギャ
ップＧ0 については、その継目が搬送物の方向に直交す
ることから4.５ｍｍまで許容できる。The gap G of the seam 2 is 0 <G ≦ 2 when the gap G of the former seam 2 is 15 degrees ≦ γ <35 degrees.
5 mm is desirable, and 0 <G when 35 degrees ≦ γ ≦ 70 degrees
≤4.5 mm is desirable. That is, a larger gap G can be tolerated as the inclination angle γ increases. The gap G 0 of the latter seam 3, acceptable because its seam perpendicular to the direction of conveyance thereof to 4.5 mm.
【００２２】図５の耐摩耗性溶接鋼管は、本発明の第１
の耐摩耗性溶接鋼管の他の例である。FIG. 5 shows a first embodiment of the present invention.
5 is another example of a wear-resistant welded steel pipe of the present invention.
【００２３】この耐摩耗性溶接鋼管１の特徴は、鋼板の
端縁を接合して出来る継目２が波形になっている点であ
る。すなわち、素材である耐摩耗性クラッド鋼板１０の
両端縁を波形に切断し、その耐摩耗性クラッド鋼板１０
を耐摩耗性金属１２を内側にして円形あるいは半円形に
成形し、端縁同士を噛み合わせて溶接することにより、
この耐摩耗性溶接鋼管１は製造される。The feature of the wear-resistant welded steel pipe 1 is that the seam 2 formed by joining the edges of the steel sheet is corrugated. That is, both edges of the wear-resistant clad steel sheet 10 which is a material are cut into a waveform, and the wear-resistant clad steel sheet 10 is cut.
Is formed into a circular or semicircular shape with the wear-resistant metal 12 inside, and the edges are engaged with each other and welded.
This wear-resistant welded steel pipe 1 is manufactured.
【００２４】そして、溶接は母材鋼板１１に対してのみ
行われ、耐摩耗性金属１２に対しては溶接が行われてい
ない。また、継目２は全体としては管中心に平行になっ
ているが、その波形の１ピッチＰにおける傾斜角度
γ1 ，γ2 はいずれも１５〜７０度とされている。The welding is performed only on the base steel plate 11 and not on the wear-resistant metal 12. The seam 2 is generally parallel to the center of the tube, but the inclination angles γ 1 and γ 2 of the waveform at one pitch P are both 15 to 70 degrees.
【００２５】このような耐摩耗性溶接鋼管も、本発明の
第１の耐摩耗性溶接鋼管に含まれ、継目２が傾斜してい
るために、耐摩耗性金属１２の溶接を省略しているにも
かかわらず、継目２の選択摩耗が抑制される。Such a wear-resistant welded steel pipe is also included in the first wear-resistant welded steel pipe of the present invention, and the welding of the wear-resistant metal 12 is omitted because the seam 2 is inclined. Nevertheless, selective wear of seam 2 is suppressed.
【００２６】図４の耐摩耗性溶接鋼管は、帯状の耐摩耗
性クラッド鋼板１０を素材としたスパイラル管であり、
本発明の第２の耐摩耗性溶接鋼管に属する。The wear-resistant welded steel pipe shown in FIG. 4 is a spiral pipe made of a strip-shaped wear-resistant clad steel sheet 10.
It belongs to the second wear-resistant welded steel pipe of the present invention.
【００２７】この鋼管も溶接継目として鋼板の端縁を接
合して出来る継目２と、鋼板の側縁を接合して出来る継
目３の２種類の継目を持つ。いずれの継目も管内面側の
耐摩耗性金属は接合されていない。そして、鋼板の端縁
を接合して出来る継目２は、管表面を通る管中心に平行
な線Ｌに対して１５〜７０度の角度γで傾斜している。This steel pipe also has two types of seams as welding seams, a seam 2 formed by joining the edges of the steel sheet and a seam 3 formed by joining the side edges of the steel sheet. In any of the joints, the wear-resistant metal on the inner surface side of the pipe is not joined. The seam 2 formed by joining the edges of the steel plate is inclined at an angle γ of 15 to 70 degrees with respect to a line L passing through the pipe surface and parallel to the pipe center.
【００２８】一方、鋼板の側線を接合して出来る継目３
は角度θで傾斜する。この角度θはピッチ角と呼ばれ、
通常４５〜８０度である。鋼板の端縁が側縁に直角の場
合、即ち鋼板を通常に切断した場合、γ＝９０度−θ度
であることから、γは１０〜４５度となる。γが本発明
範囲を満足する場合は鋼板の端縁が側縁に直角のままで
もよいが、γが本発明範囲を満足しない場合は、図４の
ように、側縁に直角な線Ｌ0 に対して端縁を傾斜させる
ことが必要となる。On the other hand, the joint 3 formed by joining the side lines of the steel sheet
Is inclined at an angle θ. This angle θ is called the pitch angle,
Usually 45-80 degrees. When the edge of the steel sheet is perpendicular to the side edge, that is, when the steel sheet is cut normally, γ is 90 degrees−θ degrees, and γ is 10 to 45 degrees. γ is may be left edges of the steel sheet at right angles to the side edges is satisfied the range of the present invention, if γ does not satisfy the present invention range, as shown in FIG. 4, perpendicular to the side edge line L 0 , It is necessary to incline the edge.
【００２９】継目のギャップは、継目２のギャップＧに
ついては１５度≦γ＜３５度の場合は０＜Ｇ≦2.５ｍ
ｍ、３５度≦γ≦７０度の場合は０＜Ｇ≦4.５ｍｍが望
ましい。継目３についてはθが４５度以下の場合はその
ギャップＧ0 を2.５ｍｍ以下に抑える必要があるが、４
５度を超える場合は4.５ｍｍまで許容できる。The gap of the seam is 0 <G ≦ 2.5 m when the gap G of the seam 2 is 15 degrees ≦ γ <35 degrees.
When m and 35 degrees ≦ γ ≦ 70 degrees, 0 <G ≦ 4.5 mm is desirable. The seam 3 when θ is 45 degrees or less is required to suppress the gap G 0 to 2.5mm or less, but 4
If it exceeds 5 degrees, it is acceptable up to 4.5 mm.
【００３０】なお、鋼板の端縁を接合して出来る継目２
は、オープン状態で溶接が行われるので、その耐摩耗性
金属を溶接しても溶接が格別困難なわけではない。従っ
て、この継目２については耐摩耗性金属を溶接してもよ
く、むしろ次のような理由から溶接を行うことが望まれ
る。The seam 2 formed by joining the edges of the steel sheet
Since welding is performed in the open state, welding of the wear-resistant metal is not particularly difficult. Therefore, the seam 2 may be welded with a wear-resistant metal, and it is desirable to perform welding for the following reason.
【００３１】耐摩耗性クラッド鋼板が耐摩耗金属を肉盛
した鋼板の場合、その長さは一般のスパイラル鋼管に使
用される鋼板の長さより短く（通常２５００〜３０００
ｍｍ）、その短い鋼板を次々と継ぎ足しながらスパイラ
ル状に巻く。そのため、鋼板の継手部の健全度が非常に
重要となる。この継手部が不健全であると、スパイラル
曲げ時に継手部が破断する危険がある。When the wear-resistant clad steel plate is a steel plate on which wear-resistant metal is built up, its length is shorter than the length of a steel plate used for a general spiral steel pipe (usually 2500 to 3000).
mm), and the short steel plates are spirally wound while being successively added. Therefore, the soundness of the joint of the steel sheet is very important. If the joint is unhealthy, there is a risk that the joint will break during spiral bending.
【００３２】また、この肉盛鋼板は、圧延で製造される
クラッド鋼板より、耐摩耗性金属の表面平滑度が劣る。
つまり、肉厚が板幅方向で一定しない。そのため、スパ
イラル曲げ時に曲げＲが異なったり、耐摩耗性金属のエ
ッジでローラを損傷させる危険がある。In addition, the overlay steel sheet is inferior in the surface smoothness of the wear-resistant metal to the clad steel sheet manufactured by rolling.
That is, the thickness is not constant in the plate width direction. For this reason, there is a risk that the bending R differs during spiral bending and that the roller is damaged by the edge of the wear-resistant metal.
【００３３】このような理由から、鋼板の端縁を接合し
て出来る継目２は、溶接後に継目２が曲げ加工を受ける
スパイラル管では、耐摩耗性金属も溶接し、且つその表
面を平坦に仕上げることが望まれる。For such a reason, the seam 2 formed by joining the edges of the steel plate is a spiral pipe in which the seam 2 is bent after welding, the wear-resistant metal is also welded, and the surface thereof is finished flat. It is desired.
【００３４】その方法としては、例えば、次の方法を用
いることができる。まず、耐摩耗性クラッド鋼板の端縁
近傍の耐摩耗性金属をアークガウジング等で除去する。
次いで、耐摩耗性金属を巻き込まないように母材鋼板の
端縁同士を片面側もしくは両面側から溶接する。そし
て、除去した耐摩耗性金属の部分を同等の性能を持つ硬
化肉盛溶接棒で肉盛する。最後に、その表面を板面と同
じレベルまで平滑に研削する。For example, the following method can be used. First, the wear-resistant metal near the edge of the wear-resistant clad steel plate is removed by arc gouging or the like.
Next, the edges of the base steel sheet are welded from one side or both sides so as not to involve the wear-resistant metal. Then, the removed portion of the wear-resistant metal is overlaid with a hardfacing welding rod having equivalent performance. Finally, the surface is ground smoothly to the same level as the plate surface.
【００３５】これをおこたり、継目２で耐摩耗性金属が
溶接されないと、スパイラル曲げ時にその隙間が起点と
なって継目２が破断する危険がある。また、曲げＲが異
なる危険やローラを損傷させる危険がある。If this occurs and the wear-resistant metal is not welded at the seam 2, there is a risk that the seam 2 will break due to the gap as a starting point during spiral bending. Further, there is a danger that the bending R is different and that the roller is damaged.
【００３６】継目２の耐摩耗性金属を溶接した場合は、
その傾斜角度の限定は不要となる。When welding the wear-resistant metal of seam 2,
It is not necessary to limit the inclination angle.
【００３７】[0037]
【発明の効果】本発明の耐摩耗性溶接鋼管は、管内面側
に位置する耐摩耗性金属の溶接を省略し、管内溶接を不
要としたので、製造がすこぶる容易であり、製造コスト
を著しく低減できる。しかも、溶接を省略した継目が傾
斜し、その選択摩耗が少ないので、管内面が均一に摩耗
し、その補修および交換に要する費用も節減できる。The wear-resistant welded steel pipe according to the present invention does not require welding of the wear-resistant metal located on the inner surface side of the pipe, and does not require welding in the pipe. Can be reduced. In addition, since the seam where welding is omitted is inclined and the selective wear is small, the inner surface of the pipe is uniformly worn, and the cost required for repair and replacement can be reduced.
【図１】従来の耐摩耗性溶接鋼管の構成を示す模式図で
ある。FIG. 1 is a schematic view showing a configuration of a conventional wear-resistant welded steel pipe.
【図２】本発明の耐摩耗性溶接鋼管の構成を示す模式図
である。FIG. 2 is a schematic diagram showing a configuration of a wear-resistant welded steel pipe of the present invention.
【図３】本発明の耐摩耗性溶接鋼管の溶接継目の構成を
示す断面図である。FIG. 3 is a sectional view showing a configuration of a welding seam of the wear-resistant welded steel pipe of the present invention.
【図４】本発明の耐摩耗性溶接鋼管の他の構成を示す模
式図である。FIG. 4 is a schematic view showing another configuration of the wear-resistant welded steel pipe of the present invention.
【図５】本発明の耐摩耗性溶接鋼管の他の構成を示す模
式図である。FIG. 5 is a schematic view showing another configuration of the wear-resistant welded steel pipe of the present invention.
１ 管 ２ 鋼板の端縁を接合して出来た継目 ３ 鋼板の側縁を接合して出来た継目 １０ 鋼板 １０ａ 端縁 １０ｂ 側縁 １１ 母材鋼板 １２ 耐摩耗性金属 Reference Signs List 1 pipe 2 seam formed by joining edges of steel sheet 3 seam formed by joining side edges of steel sheet 10 steel sheet 10a edge 10b side edge 11 base metal sheet 12 wear-resistant metal
Claims (2)
耐摩耗性クラッド鋼板を、耐摩耗性金属を内側にして管
状に成形し、その円周方向の鋼板端縁を相互に溶接接合
してなる耐摩耗性溶接鋼管において、 前記耐摩耗クラッド鋼板の端縁溶接が母材鋼板のみに施
され、且つ、その溶接継目が管中心に平行な線に対して
１５度以上７０度以下の角度で傾斜していることを特徴
とする耐摩耗性溶接鋼管。An abrasion-resistant clad steel sheet in which a wear-resistant metal is clad on a base steel sheet is formed into a tube with the wear-resistant metal inside, and circumferential steel sheet edges are welded to each other. In the wear-resistant welded steel pipe, the edge welding of the wear-resistant clad steel sheet is performed only on the base steel sheet, and the welded seam has an angle of 15 degrees or more and 70 degrees or less with respect to a line parallel to the pipe center. Wear-resistant welded steel pipe characterized in that it is inclined at.
帯状の耐摩耗性クラッド鋼板を、耐摩耗金属を内側にし
てスパイラル状に巻くことにより管状に成形し、その管
軸方向の鋼板側縁同士を相互に溶接してなる耐摩耗性溶
接鋼管において、 前記耐摩耗クラッド鋼板の側縁溶接が母材鋼板のみに施
されていることを特徴とする耐摩耗性溶接鋼管。2. A strip-shaped wear-resistant clad steel sheet in which a base material steel sheet is clad with a wear-resistant metal is formed into a tube by spirally winding the wear-resistant metal inside, and the steel sheet side in the tube axis direction. A wear-resistant welded steel pipe formed by welding edges to each other, wherein side edges of the wear-resistant clad steel sheet are applied only to a base steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16409393A JP2648791B2 (en) | 1992-10-26 | 1993-06-08 | Wear resistant welded steel pipe |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4-311318 | 1992-10-26 | ||
| JP31131892 | 1992-10-26 | ||
| JP16409393A JP2648791B2 (en) | 1992-10-26 | 1993-06-08 | Wear resistant welded steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06190439A JPH06190439A (en) | 1994-07-12 |
| JP2648791B2 true JP2648791B2 (en) | 1997-09-03 |
Family
ID=26489321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16409393A Expired - Fee Related JP2648791B2 (en) | 1992-10-26 | 1993-06-08 | Wear resistant welded steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2648791B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101067033B1 (en) * | 2003-04-25 | 2011-09-22 | 혼다 기켄 고교 가부시키가이샤 | Tubular metal body, method of producing same, liner for pressure vessel and method of producing same |
| ES2308586T3 (en) * | 2004-12-21 | 2008-12-01 | Bergrohr Gmbh Siegen | PROCEDURE FOR THE MANUFACTURE OF A MULTI-PIPE TUBE. |
-
1993
- 1993-06-08 JP JP16409393A patent/JP2648791B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06190439A (en) | 1994-07-12 |
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