CN217415113U - High-wear-resistance high-strength longitudinal submerged arc welded steel pipe - Google Patents
High-wear-resistance high-strength longitudinal submerged arc welded steel pipe Download PDFInfo
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- CN217415113U CN217415113U CN202122492776.8U CN202122492776U CN217415113U CN 217415113 U CN217415113 U CN 217415113U CN 202122492776 U CN202122492776 U CN 202122492776U CN 217415113 U CN217415113 U CN 217415113U
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Abstract
The application discloses high wear-resisting high strength longitudinal submerged arc welded steel pipe can improve the intensity and the wear resistance of steel pipe. The application includes: a base metal plate, a clad metal plate, a first welding portion and a second welding portion; the base metal plate and the coating metal plate are jointed and bent to form a tube blank, the base metal plate is an inner layer of the tube blank and is used as a supporting part of the tube blank, and the coating metal plate is an outer layer of the tube blank and is used as a wear-resistant part of the tube blank; the tube blank is provided with a welding straight seam; a base layer welding medium is arranged between two ends of the welding straight seam corresponding to the base layer metal plate and is welded with two ends of the base layer metal plate in a submerged arc welding mode to form a first welding part, and the first welding part is positioned between two ends of the base layer metal plate; and a cladding welding medium is arranged between the two ends of the cladding metal plate corresponding to the welding straight seam, so that the cladding welding medium is welded with the two ends of the cladding metal plate in a submerged arc welding mode to form a second welding part, and the second welding part is positioned between the two ends of the cladding metal plate.
Description
Technical Field
The application relates to the field of longitudinal submerged arc welded steel pipes, in particular to a high-wear-resistance high-strength longitudinal submerged arc welded steel pipe.
Background
The longitudinal submerged arc welded steel pipe is widely applied to the fields of land and seabed petroleum, natural gas, petrochemical industry, mining, electric power, capital construction engineering, steel structures, water supply and the like.
The submerged arc welded steel pipe is a spiral seam steel pipe which is formed by using a strip steel coiled plate as a raw material, performing extrusion forming at normal temperature and welding by using an automatic double-wire double-sided submerged arc welding process.
However, when the working environment is at a high temperature or under severe conditions such as dangerous activities, the longitudinal submerged arc welded steel pipe made of common materials may not meet the strength and wear resistance of the steel pipe due to the properties of the metal, so that the longitudinal submerged arc welded steel pipe may not be suitable for the severe environment enough to cause the breakage of the steel pipe, thereby causing accidents.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problems, the present application provides a high wear-resistant high-strength longitudinal submerged arc welded steel pipe, which can improve the strength and wear resistance of the steel pipe, and specifically refers to the following examples.
The application provides a high wear-resisting high strength longitudinal submerged arc welded steel pipe, include: a base metal plate, a clad metal plate, a first welding portion and a second welding portion; the base metal plate and the coating metal plate are attached and bent to form a tube blank, the base metal plate is an inner layer of the tube blank and is used as a supporting part of the tube blank, and the coating metal plate is an outer layer of the tube blank and is used as a wear-resisting part of the tube blank; the tube blank is provided with a welding straight seam; a base layer welding medium is arranged between two ends of the welding straight seam corresponding to the base layer metal plate and is welded with two ends of the base layer metal plate in a submerged arc welding mode to form a first welding part, and the first welding part is positioned between two ends of the base layer metal plate; and a coating welding medium is arranged between two ends of the welding straight seam corresponding to the coating metal plate, and is welded with two ends of the coating metal plate in a submerged arc welding mode to form a second welding part, and the second welding part is positioned between two ends of the coating metal plate.
Optionally, the base metal plate has a main chemical component content by weight of C: 0.04-0.06%, Si: 0.30 to 0.35%, Mn: 1.40-1.60%, Ni: 0.30-0.40%, Cr: 0.10 to 0.20%, Mo: 0.10 to 0.20%, Nb: 0.05 to 0.07 percent of the total weight of the alloy, less than or equal to 0.010 percent of P, less than or equal to 0.002 percent of S, less than or equal to 0.30 percent of Cu, less than or equal to 0.02 percent of Ti, less than or equal to 0.005 percent of N, less than or equal to 0.005 percent of B, and the balance of Fe and inevitable impurities.
Optionally, the clad sheet metal material is 304L stainless steel or 316L stainless steel, 316LN stainless steel or 825 alloy.
Optionally, the tensile strength of each of the base metal plate and the clad metal plate is 800MPa or more.
Optionally, the weight content of the main chemical components of the first welding part and the second welding part is C: 0.04-0.06%, Si: 0.20 to 0.40%, Mn: 1.8-2.0%, P is less than or equal to 0.020%, S is less than or equal to 0.005%, Mo is less than or equal to 0.35%, Ti: 0.01 to 0.025 percent, less than or equal to 0.010 percent of N, and the balance of Fe and inevitable impurities.
Optionally, the number of the welding straight seams arranged on the tube blank is one.
Optionally, the thickness of the base metal plate is greater than the thickness of the clad metal plate.
Optionally, the outer surface of the tube blank is a rounded surface.
Optionally, the outer surface of the coated metal plate is provided with a corrosion-resistant layer for isolating the coated dry plate from the outside.
Optionally, the gap of the welding straight seam matches the shape and size of the base layer welding medium and the cladding welding medium.
According to the technical scheme, the method has the following advantages:
the base metal plate for supporting the strength of the steel pipe is welded by using a longitudinal submerged arc welding mode in the inner layer of the pipe blank, and the cladding metal plate for resisting the wear in the outer layer of the pipe blank is welded by using the longitudinal submerged arc welding mode, so that the strength and the wear resistance of the steel pipe can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a front sectional view of a high wear-resistant high strength longitudinal submerged arc welded steel pipe according to the present application;
FIG. 2 is a right side view of a high wear-resistant high strength longitudinal submerged arc welded steel pipe according to the present application;
FIG. 3 is a cross-sectional side view of a high wear-resistant high strength longitudinal submerged arc welded steel pipe according to the present application.
Detailed Description
In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for explaining relative positional relationships between the respective members or components, and do not particularly limit the specific installation orientations of the respective members or components.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, the structures, the proportions, the sizes, and the like, which are illustrated in the accompanying drawings and described in the present application, are intended to be considered illustrative and not restrictive, and therefore, not limiting, since those skilled in the art will understand and read the present application, it is understood that any modifications of the structures, changes in the proportions, or adjustments in the sizes, which are not necessarily essential to the practice of the present application, are intended to be within the scope of the present disclosure without affecting the efficacy and attainment of the same.
The application provides a high wear-resisting high strength longitudinal submerged arc welded steel pipe, can improve the intensity and the wear resistance of steel pipe.
Referring to fig. 1, 2 and 3, the high wear-resistant high-strength longitudinal submerged arc welded steel pipe of the present application includes: a base metal plate 1, a clad metal plate 2, a first welded portion 33, and a second welded portion 4; the base metal plate 1 and the cladding metal plate 2 are jointed and bent to form a tube blank, the base metal plate 1 is an inner layer of the tube blank and is used as a supporting part of the tube blank, the cladding metal plate 2 is an outer layer of the tube blank and is used as a wear-resisting part of the tube blank, and the tube blank is provided with a welding straight seam; a base layer welding medium is arranged between two ends of the welding straight seam corresponding to the base layer metal plate 1 and is welded with two ends of the base layer metal plate 1 in a submerged arc welding mode to form a first welding part 3; and a cladding welding medium is arranged between the two ends of the cladding metal plate 2 corresponding to the welding straight seam, and is welded with the two ends of the cladding metal plate 2 in a submerged arc welding mode to form a second welding part 4.
It can be understood that the base metal plate 1 is a steel plate, which can be produced and applied in a large scale, limited by the hardness of the material and economic cost.
The steel pipe of this application comprises bimetal clad steel plate, and bimetal clad plate includes basic unit's metal sheet 1 and coating metal sheet 2, and basic unit's metal sheet 1 and coating metal sheet 2 can adopt the hot rolling technology to make bimetal clad plate for basic unit's metal sheet 1 combines together with the metallographic structure of coating metal sheet 2 completely, improves steel pipe wholeness ability.
When the steel pipe is applied to high-temperature, high-pressure or easily-abraded severe environments such as deep sea, high-temperature boilers and the like, the metal with multiple advantages of high hardness, high toughness and the like is expensive, large-scale production and application are almost impossible, the high-toughness material can be applied to the base metal plate 1 of the inner layer by using the steel pipe with the bimetal composite structure, the pressure resistance and the strength of the steel pipe are improved, the high-wear-resistance material can be applied to the outer coating metal plate 2, and the wear resistance of the steel pipe is improved.
Optionally, the weight content of the main chemical components of the base metal plate 1 is C: 0.04-0.06%, Si: 0.30-0.35%, Mn: 1.40-1.60%, Ni: 0.30-0.40%, Cr: 0.10 to 0.20%, Mo: 0.10 to 0.20%, Nb: 0.05-0.07%, P is less than or equal to 0.010%, S is less than or equal to 0.002%, Cu is less than or equal to 0.30%, Ti is less than or equal to 0.02%, N is less than or equal to 0.005%, B is less than or equal to 0.005%, and the balance of Fe and inevitable impurities. The base metal plate 1 can be low-C and high-Mn in plate composition, micro-alloy elements such as Nb, Ti and B and a small amount of Mo, Cr and Cu and Ni alloy elements are added, the base metal plate 1 belongs to the attribute category of low-carbon steel, has excellent strain resistance and excellent low-temperature toughness, and the toughness of the base metal plate 1 can reduce the stress applied to the interior of the steel pipe when the steel pipe is subjected to external pressure, so that the pressure resistance of the steel pipe is enhanced, and the strength of the steel pipe is improved.
Optionally, the clad metal plate 2 material is 304L stainless steel or 316L stainless steel, 316LN stainless steel or 825 alloy. The outer layer of the coating metal plate 2 can enable the steel pipe to have the advantages of high strength, strong integrity, good compression resistance, good wear resistance and the like, the steel pipe has stable and uniform mechanical properties, excellent impact toughness and good drop hammer tearing performance, the yield strength of the longitudinal submerged arc welded steel pipe body is 600-plus-700 MPa, the tensile strength is 700-plus-850 MPa, the elongation is more than or equal to 50%, and the requirements of the steel pipe on high reliability such as high plasticity, high strength, toughness, wear resistance and the like can be met.
Alternatively, the tensile strength of both the base metal sheet 1 and the clad metal sheet 2 is 800MPa or more.
Optionally, the weight contents of the main chemical components of the first welding portion 3 and the second welding portion 4 are C: 0.04-0.06%, Si: 0.20 to 0.40%, Mn: 1.8-2.0%, P is less than or equal to 0.020%, S is less than or equal to 0.005%, Mo is less than or equal to 0.35%, Ti: 0.01 to 0.025 percent, less than or equal to 0.010 percent of N, and the balance of Fe and inevitable impurities.
Optionally, the number of the welding straight seams arranged on the tube blank is one. Because the pipe billet is made by bending the bimetal composite plate, the joint of the two ends of the pipe billet, namely the welding straight seam, is a part which is easy to crack because of poor welding problems caused by welding technology or inevitable accidental welding, it can be understood that the performance of the steel pipe needs to be detected for a plurality of times in the actual production process, and the stability of the steel pipe can be improved by reducing the welding straight seam.
Optionally, the thickness of the base metal sheet 1 is greater than the thickness of the clad metal sheet 2. The base layer metal plate 1 is used as a main supporting part of the steel pipe, the thickness of the base layer metal plate is larger than that of the coating metal plate 2, so that the steel pipe can bear more external pressure, and meanwhile, the requirement of the high-hardness metal material of the wear-resistant layer on the thickness is smaller, compared with the requirement that the thickness of the base layer metal plate 1 is larger than that of the coating metal plate 2, the economic cost expenditure can be reduced after the performance required by the steel pipe is achieved.
Optionally, the outer surface of the tube blank is a rounded surface. The smooth surface can reduce the friction coefficient of the surface, thereby improving the wear resistance.
Optionally, the outer surface of the clad metal plate 2 is provided with a corrosion-resistant layer for isolating the clad dry plate from the outside. The corrosion-resistant layer can be sprayed by using a corrosion-resistant coating layer, and the corrosion-resistant coating layer is prepared from the following raw materials in parts by weight: 20-30 parts of alkyd resin, 3-5 parts of epoxy resin, 3-5 parts of barium petroleum sulfonate, 1-2 parts of zinc naphthenate, 30-50 parts of hydrocarbon solvent and 1-3 parts of cobalt drier.
Optionally, the outer wall of the tube billet is also coated with a layer of anti-corrosive paint.
Alternatively, the gap of the welding straight seam is matched with the shape and size of the base welding medium and the cladding welding medium, so that the problem of poor welding caused by too little welding flux or the problem of easy abrasion caused by the projection of a welding part caused by too much welding flux can be reduced.
Alternatively, the welding wire for welding the base welding medium is HO8CG, H08D or H08DG, the flux is SJ101 or SJ101G, the welding wire for welding the coating welding medium is H00Cr21Ni10, H0Cr20Ni10Ti or H00Cr19Ni12Mo2, and the flux is HJ260 or SJ 601.
It should be noted that the above-mentioned disclosure and specific embodiments are intended to demonstrate the practical application of the technical solutions provided in the present application, and should not be construed as limiting the scope of protection of the present application. Various modifications, equivalent substitutions, or improvements within the spirit and scope of the application may occur to those skilled in the art. The protection scope of this application is subject to the appended claims.
Claims (8)
1. The utility model provides a high wear-resisting high strength longitudinal submerged arc welded steel pipe which characterized in that includes: a base metal plate, a clad metal plate, a first welding portion and a second welding portion;
the base metal plate and the coating metal plate are attached and bent to form a tube blank, the base metal plate is an inner layer of the tube blank and is used as a supporting part of the tube blank, and the coating metal plate is an outer layer of the tube blank and is used as a wear-resisting part of the tube blank; the tube blank is provided with a welding straight seam; a base layer welding medium is arranged between two ends of the welding straight seam corresponding to the base layer metal plate and is welded with two ends of the base layer metal plate in a submerged arc welding mode to form a first welding part, and the first welding part is positioned between two ends of the base layer metal plate; and a coating welding medium is arranged between two ends of the welding straight seam corresponding to the coating metal plate, and is welded with two ends of the coating metal plate in a submerged arc welding mode to form a second welding part, and the second welding part is positioned between two ends of the coating metal plate.
2. The highly wear-resistant high-strength longitudinal submerged arc welded steel pipe according to claim 1, wherein the clad metal plate material is 304L stainless steel or 316L stainless steel, 316LN stainless steel or 825 alloy.
3. The highly wear-resistant high-strength longitudinal submerged arc welded steel pipe according to claim 1, wherein the tensile strength of each of the base metal plate and the clad metal plate is 800MPa or more.
4. The high-wear-resistance high-strength longitudinal submerged arc welded steel pipe according to claim 1, wherein the number of the welded longitudinal seams formed in the pipe blank is one.
5. The pipe of claim 1, wherein the thickness of the base metal plate is greater than the thickness of the clad metal plate.
6. The longitudinal submerged arc welded steel pipe with high abrasion resistance and high strength according to claim 1, wherein the outer surface of the pipe blank is a rounded surface.
7. The high-wear-resistance high-strength longitudinal submerged arc welded steel pipe according to claim 1, wherein the outer surface of the clad metal plate is provided with a corrosion-resistant layer for isolating the clad dry plate from the outside.
8. The highly wear-resistant high-strength longitudinal submerged arc welded steel pipe as claimed in claim 1, wherein the gap of said welding longitudinal seam is matched with the shape and size of said base layer welding medium and said cladding layer welding medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122492776.8U CN217415113U (en) | 2021-10-15 | 2021-10-15 | High-wear-resistance high-strength longitudinal submerged arc welded steel pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122492776.8U CN217415113U (en) | 2021-10-15 | 2021-10-15 | High-wear-resistance high-strength longitudinal submerged arc welded steel pipe |
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| CN217415113U true CN217415113U (en) | 2022-09-13 |
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| CN202122492776.8U Active CN217415113U (en) | 2021-10-15 | 2021-10-15 | High-wear-resistance high-strength longitudinal submerged arc welded steel pipe |
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- 2021-10-15 CN CN202122492776.8U patent/CN217415113U/en active Active
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