KR102153828B1 - Welding method of high manganese pipe - Google Patents

Welding method of high manganese pipe Download PDF

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KR102153828B1
KR102153828B1 KR1020190115739A KR20190115739A KR102153828B1 KR 102153828 B1 KR102153828 B1 KR 102153828B1 KR 1020190115739 A KR1020190115739 A KR 1020190115739A KR 20190115739 A KR20190115739 A KR 20190115739A KR 102153828 B1 KR102153828 B1 KR 102153828B1
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welding
pipe
high manganese
protrusion
steel plate
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KR1020190115739A
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Korean (ko)
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이익재
이종두
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주식회사 창원벤딩
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    • 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
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B23K31/027—Making tubes with soldering or welding
    • 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 degrees C
    • B23K35/3053—Fe as the principal constituent
    • B23K35/3073—Fe as the principal constituent with Mn as next major constituent

Abstract

The present invention relates to a method of welding a high-manganese pipe, and to a method of welding a high-manganese pipe, which is configured to manufacture a pipe by rolling a high-manganese steel sheet into a circle and connecting end portions of the rolled high-manganese steel sheet to each other. The method of welding a high-manganese pipe comprises a steel sheet cutting step of cutting a steel sheet, a sealing welding step, an internal welding step, and an external welding step. In addition, the steel sheet cutting step comprises the processes of: forming square plate-shaped front and rear protruding portions on left and right ends of the high-manganese pipe steel sheet; sharply forming front ends of the protruding portions of the cut steel sheet into a triangular shape, wherein the front protruding portion is sharply formed at the front and the rear protruding portion is sharply formed at the rear; and rolling the steel sheet, on which the protruding portions are formed, into a circle and connecting end portions of the rolled steel plate to each other. The present invention ensures excellent welding quality and a short working time, and can save consumption of raw materials, thereby having economic effect.

Description

고망간파이프의 용접방법{Welding method of high manganese pipe}Welding method of high manganese pipe

본발명은 고망간파이프의 용접방법에 관한 것으로, 보다 상세하게는 용접품질이 뛰어나고 작업시간이 짧고 원자재가 절약되므로 경제적인 고망간파이프의 용접방법에 관한 것이다.The present invention relates to a method of welding a high manganese pipe, and more particularly, to an economical welding method of a high manganese pipe because the welding quality is excellent, the working time is short, and raw materials are saved.

일반적으로 철재파이프와 달리 고망간파이프는 용접방법이 어려우므로 이에 대한 기술이 발전되어 왔고 일례로서, 공개특허공보 공개번호 10-2019-0074844호에는 고망간강에 원통형의 홀을 형성시키는 단계; 및In general, unlike steel pipes, high manganese pipes have a difficult welding method, so the technology for this has been developed. As an example, Korean Patent Application Publication No. 10-2019-0074844 includes the steps of forming a cylindrical hole in high manganese steel; And

상기 홀이 형성된 고망간강을 구조재에 접촉시킨 뒤, 상기 홀에 오스테나이트계 용접재료를 충진시키면서 상기 고망간강과 구조재를 용접하는 단계를 포함하고,Contacting the high manganese steel with the hole formed thereon to the structural material, and then welding the high manganese steel and the structural material while filling the hole with an austenitic welding material,

상기 용접재료의 충진은 홀의 중심부로부터 외곽부 방향으로 선회시키면서 이루어지며,Filling of the welding material is performed while turning from the center of the hole toward the outer part,

상기 용접재료의 충진시 용접입열량 1.5~1.8KJ/mm인 고망간강의 플러그 용접 방법이 공개되어 왔다.A plug welding method of high manganese steel having a welding heat input of 1.5 to 1.8 KJ/mm when the welding material is filled has been disclosed.

또한, 공개특허공보 공개번호 10-2019-0076148호에는 고강도 고 Mn 강을 용접하여 얻어지는 용접이음부에 있어서, 상기 용접이음부는, 중량%로, C: 0.18~0.61%, Si: 0.23~0.38%, Mn: 16.2~23.0%, Ni: 3.0~10.0%, Al: 0~3.0%, Cr: 4.0~10.0%, Mo: 0~3.0%, P:0.003%이하, S: 0.02%이하, 잔여 Fe 및 기타 불가피한 불순물을 포함하는 것을 특징으로 하는 용접이음부가 공개되어 있다.In addition, Laid-Open Patent Publication No. 10-2019-0076148 discloses that in a welded joint obtained by welding high-strength high Mn steel, the welded joint is, by weight, C: 0.18 to 0.61%, Si: 0.23 to 0.38. %, Mn: 16.2~23.0%, Ni: 3.0~10.0%, Al: 0~3.0%, Cr: 4.0~10.0%, Mo: 0~3.0%, P: 0.003% or less, S: 0.02% or less, residual A welded joint is disclosed, characterized by containing Fe and other inevitable impurities.

곧 일반적으로 종래기술은 일반강재 파이프 L-SEAM 용접부 양쪽 END PIECE 장착방법으로서, 일반재질(카본)은 양쪽 END PIECE와 제품연결부에 용접결함(크랙)발생률이 매우 적다(END PIECE와 제품재질은 동일조건이다).In general, the conventional technology is a method of installing END PIECE on both sides of the L-SEAM welding part of a general steel pipe, and the general material (carbon) has very little incidence of welding defects (cracks) on both END PIECE and product connections (the same as END PIECE and product material). Condition).

그리고 종래에는 고망간 제품의 용접을 위해 실링용접, 내부용접, 전단계의 용접부위를 제거하는 후방 가우징(back gouging) 혹은 밀링가공단계, 외부용접을 순차적으로 이행한다.곧 실링 용접부위를 제거하여 순수 saw 용접만 남긴다.In addition, conventionally, sealing welding, internal welding, back gouging or milling, and external welding are sequentially performed for welding of high manganese products. Only pure saw welding is left.

그러나 상기 종래 기술은 용접성은 적합할지라도 작업시간이 오래 걸리며 원자재의 낭비가 많이 발생하여 비경제적인 단점이 있었다.However, although the weldability of the prior art is suitable, it takes a long time to work and wastes a lot of raw materials, which is uneconomical.

따라서 본 발명은 상기와 같은 문제점을 해결하고자 안출된 것으로, 본발명은 용접품질이 뛰어나고 작업시간이 짧고 원자재가 절약되므로 경제적인 고망간파이프의 용접방법을 제공하고자 하는 것이다.Accordingly, the present invention has been devised to solve the above problems, and the present invention is to provide an economical high-manganese pipe welding method since the welding quality is excellent, the working time is short, and the raw material is saved.

본발명은 고망간파이프의 용접방법에 관한 것으로, 고망간 재질 강판을 원형으로 말아서 끝단부를 서로 연결하여 파이프를 제작하는 고망간파이프의 용접방법에 있어서, 상기 고망간파이프의 용접방법은,The present invention relates to a method of welding a high manganese pipe, in a method of welding a high manganese pipe by rolling a steel sheet made of high manganese into a circular shape and connecting the ends to each other, wherein the welding method of the high manganese pipe comprises:

강판을 절단하는 강판절단단계;Steel plate cutting step of cutting the steel plate;

실링용접단계;Sealing welding step;

내부용접단계;Internal welding step;

외부용접단계;를 포함하는 것을 특징으로 한다.It characterized in that it comprises a; external welding step.

따라서 본발명은 용접품질이 뛰어나고 작업시간이 짧고 원자재가 절약되므로 경제적인 현저한 효과가 있다.Therefore, the present invention has a remarkable economic effect because the welding quality is excellent, the working time is short, and raw materials are saved.

도 1은 본발명의 고망간파이프의 강판을 돌출부가 측면에 형성되게 절단하여 원형으로 구부린 상태도,
도 2는 도 1의 수직단면도
도 3은 도 1의강판을 돌출부가 측면에 형성되게 절단하여 원형으로 구부린 상태에서 양측면에 엔드피스를 가용접하는 상태도,
도 4는 도 3의 정면 상태도
도 5는 길이방향 실링용접 및 상하부용접부 공정 및 확대도
도 6은 종래의 고망간파이프의 길이방향 실링용접 및 상하부용접부 공정 및 확대도(전단계의 실링용접부를 제거하는 공정이 포함됨)1 is a state diagram of a high manganese pipe of the present invention cut into a circular shape by cutting the steel plate so that the protrusion is formed on the side thereof;
Figure 2 is a vertical cross-sectional view of Figure 1
3 is a state diagram in which end pieces are temporarily welded to both sides in a state where the steel plate of FIG. 1 is cut to form a protrusion on the side and bent in a circular shape,
Figure 4 is a front view of Figure 3
Figure 5 is a longitudinal sealing welding and upper and lower welding part process and enlarged view
Figure 6 is a longitudinal sealing welding and upper and lower welding part process and enlarged view of a conventional high manganese pipe (the process of removing the sealing weld in the previous step is included)

본발명은 고망간파이프의 용접방법에 관한 것으로, 고망간 재질 강판을 원형으로 말아서 끝단부를 서로 연결하여 파이프를 제작하는 고망간파이프의 용접방법에 있어서, 상기 고망간파이프의 용접방법은,The present invention relates to a method of welding a high manganese pipe, in a method of welding a high manganese pipe by rolling a steel sheet made of high manganese into a circular shape and connecting the ends to each other, wherein the welding method of the high manganese pipe comprises:

강판을 절단하는 강판절단단계;Steel plate cutting step of cutting the steel plate;

실링용접단계;Sealing welding step;

내부용접단계;Internal welding step;

외부용접단계;를 포함하는 것을 특징으로 한다.It characterized in that it comprises a; external welding step.

또한, 상기 강판절단단계에서는 고망간 파이프 강판의 좌우측 단부에는 사각판형상의 전후방 돌출부를 각각 형성하는 공정, 상기 절단된 강판의 돌출부 선단을 삼각형으로 뾰족하게 형성하되 전방의 돌출부는 전방쪽을 뾰족하게 형성하고 후방의 돌출부는 후방쪽을 뾰족하게 형성하는 공정, 상기 돌출부가 형성된 강판을 원형으로 말아서 끝단이 서로 맏닿게 하는 공정을 포함하는 것을 특징으로 한다.In addition, in the steel plate cutting step, a process of forming square plate-shaped front and rear protrusions at the left and right ends of the high manganese pipe steel plate, respectively, and the tip of the protrusion of the cut steel plate is sharpened in a triangular shape, but the front protrusion is sharpened at the front side. And it characterized in that it comprises a step of forming the rear side of the protrusion pointed at the rear side, and a step of rolling the steel plate on which the protrusion is formed into a circle so that the ends come into contact with each other.

또한, 상기 돌출부에 엔드 피스(end piece)를 결합하는 것을 특징으로 한다.In addition, it is characterized in that the end piece is coupled to the protrusion.

또한 상기 엔드 피스(end piece)는 돌출부와 동일 형상인 것을 특징으로 한다.In addition, the end piece (end piece) is characterized in that the same shape as the protrusion.

본발명을 첨부도면에 의해 상세히 설명하면 다음과 같다. The present invention will be described in detail with reference to the accompanying drawings as follows.

도 1은 본발명의 고망간파이프의 강판을 돌출부가 측면에 형성되게 절단하여 원형으로 구부린 상태도, 도 2는 도 1의 수직단면도, 도 3은 도 1의강판을 돌출부가 측면에 형성되게 절단하여 원형으로 구부린 상태에서 양측면에 엔드피스를 가용접하는 상태도, 도 4는 도 3의 정면 상태도, 도 5는 길이방향 실링용접 및 상하부용접부 공정 및 확대도, 도 6은 종래의 고망간파이프의 길이방향 실링용접 및 상하부용접부 공정 및 확대도(전단계의 실링용접부를 제거하는 공정이 포함됨)이다.1 is a state diagram of a steel plate of a high manganese pipe of the present invention cut to form a protrusion on the side and bent in a circular shape, FIG. 2 is a vertical cross-sectional view of FIG. 1, and FIG. 3 is a cut to form the protrusion of the steel plate of FIG. Thus, a state diagram of tentative welding the end pieces on both sides in a circularly bent state, FIG. 4 is a front view of FIG. 3, FIG. 5 is a longitudinal sealing welding and an enlarged view of the upper and lower welds, and FIG. 6 is a diagram of a conventional high manganese pipe. It is a longitudinal sealing welding and upper and lower welding part process and enlarged view (including the process of removing the sealing welding part of the previous step).

본발명 고망간파이프의 용접방법은 고망간 재질 강판을 원형으로 말아서 끝단부를 서로 연결하여 파이프를 제작하는 고망간파이프의 용접방법이다. 본발명의 상기 고망간파이프의 용접방법은, The welding method of a high manganese pipe of the present invention is a welding method of a high manganese pipe in which a steel plate made of high manganese is rolled into a circle and the ends are connected to each other to produce a pipe. The welding method of the high manganese pipe of the present invention,

강판을 절단하는 강판절단단계;Steel plate cutting step of cutting the steel plate;

실링용접단계;Sealing welding step;

내부용접단계;Internal welding step;

외부용접단계;를 포함하는 것이다.It includes an external welding step.

이때 상기 강판절단단계에서는 고망간 파이프 강판의 좌우측 단부에는 좌우측 돌출부를 각각 형성하여 상기 돌출부에 엔드 피스(end piece)를 결합한다. 용접방법은 전기용접 방법을 한다. 본발명에서 사용되는 고망간강은 통상 강종에서는 망간 함량이 전체의 3 ~ 27중량%가 함유된 것을 고망간강으로 호칭하나, 본발명에서는 주로 망간 함량이 17 ~ 18중량%가 함유된 것을 사용한다.At this time, in the steel plate cutting step, left and right protrusions are formed at the left and right ends of the high manganese pipe steel plate, respectively, and end pieces are coupled to the protrusions. The welding method is an electric welding method. The high manganese steel used in the present invention is usually referred to as high manganese steel in which the manganese content is 3 to 27% by weight in the steel type, but in the present invention, the manganese content is mainly used in the case of 17 to 18% by weight.

상기 강판절단단계에서는 고망간 파이프 강판의 좌우측 단부에는 사각판형상의 전후방 돌출부를 각각 형성하는 공정, 상기 절단된 강판의 돌출부 선단을 삼각형으로 뾰족하게 형성하되 좌,우측 전방의 돌출부는 전방쪽을 뾰족하게 형성하고 좌, 우측 후방의 돌출부는 후방쪽을 뾰족하게 형성하는 공정, 상기 돌출부가 형성된 강판을 원형으로 말아서 끝단이 서로 맏닿게 하는 공정을 포함한다. 뾰족하게 하는 공정은 원형으로 말았을때 닿는 끝단부 상하부에 용접을 하기 위해 강판 두께의 길이방향 가운데가 전방으로 돌출되어 상하부 경사면이 형성되게 한다. 곧 돌출부의 형상은 단면이 ‘

Figure 112019096172571-pat00001
’형상이 된다.In the steel plate cutting step, a process of forming square plate-shaped front and rear protrusions at the left and right ends of the high manganese pipe steel plate, respectively, and the protrusions of the cut steel plate are sharpened in a triangular shape, but the protrusions at the front left and right are pointed at the front side. And forming the left and right rear protrusions to sharpen the rear side, and rolling the steel plate on which the protrusions are formed into a circle so that the ends of the protrusions come into contact with each other. In the sharpening process, in order to weld the upper and lower ends of the ends that touch when they are rolled into a circle, the middle of the thickness of the steel plate protrudes forward to form the upper and lower slopes. In other words, the shape of the protrusion is'
Figure 112019096172571-pat00001
'It becomes a shape.

그리고 상기 엔드 피스(end piece)는 돌출부와 동일 형상이 된다. And the end piece has the same shape as the protrusion.

그러므로 실링용접 전에 상기 돌출부에 엔드 피스를 가용접하고 용접하되, 용접 시작위치를 상기 엔드 피스의 길이방향으로 중간위치에서 하면 용접시 용융된 철강이나 용접봉이 측면으로 흘러나오더라도 완제품인 파이프 몸체에 묻지 않게 되는 효과가 있다.Therefore, before sealing welding, the end piece is temporarily welded to the protrusion and welded, but if the welding start position is in the middle position in the longitudinal direction of the end piece, even if the molten steel or welding rod flows out to the side during welding, the pipe body of the finished product will not be stained. Has the effect of being.

곧 상기 파이프 제작작업이 완료되면 엔드피스와 돌출부는 절단하여 제거하면 완전한 파이프 형상이 된다.Soon, when the pipe manufacturing work is completed, the end piece and the protrusion are cut and removed to form a complete pipe.

따라서 본발명은 용접품질이 뛰어나고 작업시간이 짧고 원자재가 절약되므로 경제적인 현저한 효과가 있다.Therefore, the present invention has a remarkable economic effect because the welding quality is excellent, the working time is short, and raw materials are saved.

1 : 실링용접부
2 : 내부용접부
3 : 외부용접부
91 : 돌출부
91-1 : 좌측전방 돌출부 91-2 : 우측 전방 돌출부
91-3 : 좌측 후방 돌출부 91-4 : 우측 후방 돌출부
10 : 실링용접부
92 : 엔드 피스
20 : 내부용접부
30 : 후방 가우징(back gouging) 혹은 밀링가공에 의한 실링용접부의 제거하는 부위
40 : 외부용접부1: Sealing welding part
2: Internal welding part
3: External welding part
91: protrusion
91-1: left front protrusion 91-2: right front protrusion
91-3: left rear protrusion 91-4: right rear protrusion
10: sealing welding part
92: end piece
20: internal welding part
30: The part to be removed from the sealing weld by back gouging or milling
40: external welding part

Claims (3)

고망간 재질 강판을 원형으로 말아서 끝단부를 서로 연결하여 파이프를 제작하는 고망간파이프의 용접방법에 있어서, 상기 고망간파이프의 용접방법은,
강판을 절단하는 강판절단단계;
실링용접단계;
내부용접단계;
외부용접단계;를 포함하는 고망간파이프의 용접방법에 있어서,
상기 강판절단단계에서는 고망간 파이프 강판의 좌우측 단부에는 좌우측 돌출부(91)를 각각 형성하여 상기 돌출부(91)에 엔드 피스(end piece)(92)를 결합하되 용접방법은 전기용접을 하며, 상기 고망간강은 망간 함량이 17 ~ 18중량%가 함유된 것이며,
상기 강판절단단계에서는 고망간 파이프 강판의 좌우측 단부에는 사각판형상의 전후방 돌출부(91)를 각각 형성하는 공정, 상기 절단된 강판의 돌출부(91) 선단을 삼각형으로 뾰족하게 형성하는 공정, 상기 돌출부(91)가 형성된 강판을 원형으로 말아서 끝단이 서로 맞닿게 하는 공정을 포함하는 것으로, 뾰족하게 하는 공정은 원형으로 말았을때 닿는 끝단부 상하부에 용접을 하기 위해 강판 두께의 길이방향 가운데가 전방으로 돌출되어 상하부 경사면이 형성되게 하는 것으로, 돌출부(91)의 형상은 단면이 ‘
Figure 112020034793877-pat00008
’형상이 되고,
상기 엔드 피스(end piece)(92)는 돌출부(92)와 동일 형상이 되어,
실링용접 전에 상기 돌출부(91)에 엔드 피스(92)를 가용접하고 용접하되, 용접 시작위치를 상기 엔드 피스(92)의 길이방향으로 중간위치에서 하면 용접시 용융된 철강이나 용접봉이 측면으로 흘러나오더라도 완제품인 파이프 몸체에 묻지 않게 되는 것으로, 상기 파이프 제작작업이 완료되면 엔드피스(92)와 돌출부(91)는 절단하여 제거하여 완전한 파이프 형상을 제작하는 것을 특징으로 하는 고망간파이프의 용접방법In the welding method of a high manganese pipe manufacturing a pipe by rolling a steel sheet made of high manganese in a circular shape and connecting ends to each other, the welding method of the high manganese pipe,
Steel plate cutting step of cutting the steel plate;
Sealing welding step;
Internal welding step;
In the welding method of a high manganese pipe comprising an external welding step,
In the steel plate cutting step, left and right protrusions 91 are formed at the left and right ends of the high manganese pipe steel plate, respectively, and an end piece 92 is attached to the protrusion 91, but the welding method is electric welding. Manganese steel contains 17 to 18% by weight of manganese,
In the steel plate cutting step, a process of forming square plate-shaped front and rear protrusions 91 respectively at left and right ends of the high manganese pipe steel plate, a process of forming the tip of the cut steel plate protrusion 91 in a triangular shape, and the protrusion 91 ) Is rolled into a circle so that the ends come into contact with each other.The sharpening process is to weld the upper and lower ends of the ends that touch when rolled into a circle. The upper and lower inclined surfaces are formed, and the shape of the protrusion 91 is'
Figure 112020034793877-pat00008
'Become a shape,
The end piece 92 has the same shape as the protrusion 92,
Before sealing welding, the end piece 92 is tentatively welded to the protrusion 91 and welded, but if the welding start position is at an intermediate position in the longitudinal direction of the end piece 92, the molten steel or welding rod flows out to the side during welding. The welding method of a high manganese pipe, characterized in that when the pipe manufacturing work is completed, the end piece 92 and the protrusion 91 are cut and removed to form a complete pipe shape. 삭제delete 삭제delete
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59124686U (en) * 1983-02-08 1984-08-22 三井造船株式会社 Welding tab
JP2014018816A (en) * 2012-07-17 2014-02-03 Jfe Steel Corp Welded steel pipe and method of manufacturing the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59124686U (en) * 1983-02-08 1984-08-22 三井造船株式会社 Welding tab
JP2014018816A (en) * 2012-07-17 2014-02-03 Jfe Steel Corp Welded steel pipe and method of manufacturing the same

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