A distributed tungsten carbide reinforced high-strength steel butt weld structure and manufacturing method

Abstract

The present invention discloses a distributed tungsten carbide reinforced high-strength steel butt weld structure and manufacturing method. The structure consists of a base layer formed by melting a single high-strength steel wire, an overall filling layer in which a high-strength steel-tungsten carbide single filling layer and a high-strength steel single filling layer are alternately distributed, and a capping layer in which high-strength steel-tungsten carbide is alternately distributed. The structure is manufactured using a consumable gas shielded double-wire process. By controlling the switching of high-content tungsten carbide and high-strength steel wire, the alternating melting reaches the length of each set area, thereby realizing a medium-thick plate high-strength steel butt joint structure in the form of distributed tungsten carbide reinforced multi-layer and multi-pass, with tungsten carbide alternately distributed in the high-strength steel weld. By controlling the distance and alternating distribution of the welds formed by the alternating melting of high-strength steel and tungsten carbide wire, the present invention realizes a reinforced weld structure in which the two wires are alternately distributed, so that the tensile strength, average hardness, and dynamic mechanical properties of the weld zone all exceed those of the parent material, solving the problem that the performance of the armor high-strength steel weld zone is lower than that of the parent material.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding, and in particular relates to a distributed tungsten carbide reinforced high-strength steel butt weld structure and a manufacturing method. Background Art

[0002] With the rapid development of science and technology, many industries now have increasingly higher requirements for the comprehensive performance of metal materials. Homogeneous materials can no longer meet the use requirements of key components under certain working conditions. Tungsten carbide ceramic particles, as a commonly used material for wear-resistant surfacing, have the characteristics of high hardness and high wear resistance. They are often embedded in cobalt-based matrices, nickel-based matrices, and iron-based matrices to prepare wear-resistant composite surfacing layers. The cost of iron-based tungsten carbide is lower than the other two, and the wetting angle between tungsten carbide and iron-based metals is zero. Therefore, it is considered to be the most suitable choice for preparing wear-resistant surfacing layers and is widely used in petroleum engineering, military equipment and other fields. Compared with the powder form, the application of tungsten carbide powder core wire greatly improves production efficiency and material utilization, can flexibly cope with welding in various special positions, and is favored by researchers.

[0003] Patent A heterogeneous additive structure and manufacturing method of iron-based tungsten carbide and stainless steel (application number 202110506651.8) discloses a method for manufacturing a multi-dimensional heterogeneous additive structure of ultra-hard iron-based tungsten carbide and soft stainless steel. The heterogeneous structure prepared by this method achieves a combination of ultra-high hardness and high toughness. However, compared with the melting electrode double wire welding, the efficiency is lower, and when faced with complex structures, bypass wire feeding will have disadvantages such as inconvenient automated path planning. Patent A multi-layer and multi-pass welding method for Q690D low-alloy high-strength steel thick plates (application number 202110107341.9) discloses a welding method for Q690D low-alloy high-strength steel thick plate butt joints. This method is a combined welding method of gas shielded welding for base and submerged arc welding for filling and covering. The weld area is welded with homogeneous material, and does not involve the design and performance enhancement of the butt weld filling structure of such medium and thick plates. Summary of the Invention

[0004] The purpose of the present invention is to provide a distributed tungsten carbide reinforced high-strength steel butt weld structure and manufacturing method, in which the base layer in the butt weld structure is a single high-strength steel wire molten weld, the filling layer is an alternating distribution structure of high-strength steel-tungsten carbide distributed single filling layer and a single high-strength steel single filling layer, and the cover layer is also an alternating distribution structure of high-strength steel-tungsten carbide, so that the weld can simultaneously obtain high hardness, high strength, high wear resistance and high impact resistance.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A distributed tungsten carbide reinforced high-strength steel butt weld structure, wherein the weld joint structure is a high-strength steel butt joint, and the weld filler metal tungsten carbide is distributed in a multi-layer and multi-pass form;

[0007] High content of tungsten carbide is alternately distributed in high-strength steel welds;

[0008] The base layer of the welded joint structure is a single high-strength steel wire fusion weld;

[0009] The weld joint structure features alternating high-strength steel wire and high-content tungsten carbide wire in the filler layers. The high-strength steel and high-content tungsten carbide filler layers are staggered in the X, Y, and Z directions, with the tungsten carbide filler layer predominant. A single high-strength steel wire filler layer is interspersed between layers. Welding directions are the same for welds on the same layer, and opposite for welds on adjacent layers.

[0010] The weld joint's structural cap layer also features alternating high-strength steel wire melt capping areas and high-content tungsten carbide wire melt capping areas. These areas alternate in the X and Y directions, with the high-strength steel filler area accounting for a higher proportion. Adjacent welds are welded in the same direction.

[0011] The transverse X direction refers to the direction perpendicular to the length of the butt weld; the longitudinal Y direction refers to the length of the butt weld; and the vertical Z direction refers to the depth direction of the butt weld, that is, the thickness direction of the plate.

[0012] Furthermore, the thickness d of the high-strength steel plate for butt welding is 20 to 40 mm, and the tensile strength of the high-strength steel is greater than 1200 MPa.

[0013] Furthermore, the applicable material is high-strength steel of armor material, and the groove form is V-shaped or X-shaped.

[0014] Furthermore, in each weld bead of the high-strength steel-tungsten carbide single filling layer of the welded joint structure, the switching length ratio K1 of the high-strength steel wire molten filling area W1 and the high-content tungsten carbide wire molten filling area W2 in the Y direction is 1:1 to 1:3.

[0015] Furthermore, in each weld bead of the welded joint structure cap layer, the switching length ratio K2 of the high-strength steel wire melt cap area W3 and the high-content tungsten carbide wire melt cap area W4 in the Y direction is 2:1 to 9:1.

[0016] A method for manufacturing a distributed tungsten carbide reinforced high-strength steel butt weld structure comprises the following specific steps:

[0017] (1) High-strength steel wire ignites the arc at the root of the groove, and the wire is fed at a speed V w1 Move in the +Y direction to melt and complete the filling of the base layer.

[0018] (2) The high-strength steel wire ignites the arc on the groove surface near the -X direction, and the wire is fed at a speed V w1 Move in the +Y direction to melt and form a high-strength steel filling area with a length of W1. Switch the high-content tungsten carbide wire according to the wire feeding speed V w2 Move in the +Y direction to melt and form a tungsten carbide filling area with a length of W2. In this way, the two kinds of wire materials are switched and fed in a cycle. The high-strength steel melting filling area W1 and the high-content tungsten carbide melting filling area W2 of the filling weld are switched according to the ratio K1 until the first weld of the first layer of the filling layer is completed. The high-content tungsten carbide wire is fed at the starting point of the second adjacent weld in the same layer according to the wire feeding speed V w2 Feed and move in the +Y direction to melt and form a tungsten carbide filling area with a length of W2, switch and control the high-strength steel wire according to the wire feeding speed V w1 Move in the +Y direction to melt and form a high-strength steel filling area with a length of W1. In this way, the two types of wires are switched and fed in a cycle. The high-strength steel melting filling area W1 and the high-content tungsten carbide melting filling area W2 are also switched according to the ratio K1 until the second weld of the first layer of the filling layer is completed. After that, the odd-numbered welds in the same layer are filled in the same way as the first weld, and the even-numbered welds in the same layer are filled in the same way as the second weld, until the last weld near the +X side groove is completed, and the first layer of the filling layer is filled to form a high-strength steel-tungsten carbide distributed filling layer. The high-strength steel wire is at the arc extinguishing position of the first weld in the first layer of the filling layer according to the wire feeding speed V w1 It is fed and moved in the -Y direction to melt, completing the first, second, and... passes in sequence until the nth weld pass near the groove on the +X side is completed. The second filler layer is filled and a single high-strength steel wire melt filler layer is formed. Afterwards, a high-strength steel-tungsten carbide distributed single filler layer and a single high-strength steel single filler layer are alternately distributed and filled in the Z direction. Each layer is respectively carried out according to the above-mentioned high-strength steel-tungsten carbide distributed single filler layer weld switching rules and a single high-strength steel single filler layer rule until the entire filler layer area is completed, forming a multi-filler layer structure in which a high-strength steel-tungsten carbide distributed single filler layer and a single high-strength steel single filler layer are alternately distributed.

[0019] (3) High-strength steel wire according to the wire feeding speed V w1 Move in the +Y direction to melt first to form a high-strength steel cover area with a length of W3, switch to high-content tungsten carbide wire according to the wire feeding speed V w2 Move in the +Y direction to melt and form a high-content tungsten carbide capping area with a length of W4. The high-strength steel melt capping area W3 of the filler weld and the high-content tungsten carbide melt capping area W4 are switched according to the ratio K2 until the first high-strength steel-tungsten carbide alternating distribution capping layer is formed. Then, the high-content tungsten carbide wire is fed at the starting point of the second adjacent weld in the same layer at the wire feeding speed V w2Feed and move in the +Y direction to melt first to form a tungsten carbide melt cover area with a length of W4, switch and control the high-strength steel wire according to the wire feeding speed V w1 The weld moves in the +Y direction to melt and form a high-strength steel capping area with a length of W3. The high-strength steel melt capping area W3 of the filler weld and the high-content tungsten carbide melt capping area W4 are also switched according to the ratio K2 until the second pass of the high-strength steel and tungsten carbide alternating distribution capping layer is formed. After that, the odd-numbered welds of the capping layer are filled in the same way as the first weld of the capping layer, and the even-numbered welds of the capping layer are filled in the same way as the second weld of the capping layer until the entire capping layer is completed, forming a capping layer structure with alternating high-strength steel and tungsten carbide, thereby finally completing the distributed tungsten carbide reinforced multi-layer and multi-pass high-strength steel butt weld structure of the entire weld.

[0020] Furthermore, the two alternately melt-filled wires are high-content tungsten carbide wire and high-strength steel wire, and the wire feeding speed of the high-content tungsten carbide wire is V w2 3.6~4.5m / min. High-strength steel wire feeding speed V w1 5.0~8.0m / min.

[0021] Furthermore, the volume ratio of tungsten carbide filling in the high-content tungsten carbide wire is 25-50%.

[0022] Furthermore, the overlapping area length W between the arc striking position of the high content tungsten carbide melting area and the arc extinguishing position of the high strength steel melting area is a The overlap length W between the arc striking position of the high-strength steel melting area and the arc extinguishing position of the high-content tungsten carbide melting area is 2 to 10 mm. b 2 to 10 mm.

[0023] Compared with the existing technology, the significant advantages of the present invention are: 1. The base layer in the weld structure is a single high-strength steel wire melt weld, the filling layer is a high-strength steel-tungsten carbide distributed single filling layer and a single high-strength steel single filling layer alternatingly distributed structure, and the cover layer is also a high-strength steel-tungsten carbide alternating distribution structure, which solves the problem that the performance of the armor material weld area is lower than that of the parent material area. 2. The welded multi-layer and multi-pass medium and thick plate high-strength steel butt joints have excellent performance, high hardness, high strength, high wear resistance, and high impact resistance. 3. This method uses double-wire consumable electrode argon arc welding, and the feeding of different wires can be switched arbitrarily during the welding process, thereby completing the design of structures in different regions, with the characteristics of flexible implementation and good flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A top view of the filler layer weld structure in a welded joint. (The white area represents high-strength steel, the shaded area represents high-content tungsten carbide, and the blank lines on both sides represent high-strength steel parent material.)

[0025] Figure 2 A top view of the weld bead structure of the weld joint cap layer. (The white area represents high-strength steel, the shaded area represents high-content tungsten carbide material, and the blank lines on both sides represent high-strength steel base material.)

[0026] Figure 3 Schematic diagram of a distributed tungsten carbide reinforced multi-layer, multi-pass high-strength steel butt joint after welding. (The white area represents the high-strength steel material, and the shaded area represents the high-content tungsten carbide material) DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0028] In the present invention, the transverse X direction refers to the direction perpendicular to the length of the butt weld; the longitudinal Y direction refers to the length of the butt weld; and the vertical Z direction refers to the depth direction of the butt weld, that is, the plate thickness direction.

[0029] Example 1

[0030] The enhanced butt weld structure of the present invention is manufactured by a double-wire consumable electrode argon arc welding method, wherein the shielding gas used for tungsten carbide wire is 95% Ar + 5% CO2 with a gas flow rate of 25 L / min, and the shielding gas used for high-strength steel wire is 80% Ar + 20% CO2 with a gas flow rate of 20 L / min.

[0031] The distributed tungsten carbide reinforced high-strength steel butt weld structure is a high-strength steel butt joint, and the weld filler metal tungsten carbide is distributed in multiple layers and multiple passes;

[0032] High content of tungsten carbide is alternately distributed in high-strength steel welds;

[0033] The base layer of the welded joint structure is a single high-strength steel wire fusion weld;

[0034] The weld joint structure features alternating high-strength steel wire and high-content tungsten carbide wire in the filler layers. The high-strength steel and high-content tungsten carbide filler layers are staggered in the X, Y, and Z directions, with the tungsten carbide filler layer predominant. A single high-strength steel wire filler layer is interspersed between layers. Welding directions are the same for welds on the same layer, and opposite for welds on adjacent layers.

[0035] The weld joint's structural cap layer also features alternating high-strength steel wire melt capping areas and high-content tungsten carbide wire melt capping areas. These areas alternate in the X and Y directions, with the high-strength steel filler area accounting for a higher proportion. Adjacent welds are welded in the same direction.

[0036] To enhance the butt weld structure, the thickness d of the high-strength steel plate used for butt welding is 20 mm, and the tensile strength of the high-strength steel is 1300 MPa.

[0037] The butt weld structure is enhanced, the applicable material is high-strength steel of armor material, and the groove form is V-shaped.

[0038] To enhance the butt weld structure, in each weld bead of the high-strength steel-tungsten carbide single filling layer of the welded joint structure, the switching length ratio K1 in the Y direction of the high-strength steel wire molten filling area W1 and the high-content tungsten carbide wire molten filling area W2 is 1:1.

[0039] To enhance the butt weld structure, in each weld bead of the cover layer of the welded joint structure, the switching length ratio K2 in the Y direction between the high-strength steel wire melt cover area W3 and the high-content tungsten carbide wire melt cover area W4 is 2:1.

[0040] Combine Figures 1 to 3 The manufacturing method of the distributed tungsten carbide reinforced high-strength steel butt weld structure includes the following specific steps:

[0041] (1) Make a V-shaped groove on the steel plate to be welded and grind the groove. The groove angle α is 40° and the blunt edge p is 2mm. Use acid and alkali cleaning solution to remove surface oil and oxide film within a range of about 50mm on both sides of the steel plate groove, wash with water and wipe with acetone. Use a low-temperature heat treatment furnace to preheat the steel plate before welding, and the preheating temperature is 150℃. Use flexible tooling to butt and fix the steel plates before welding, and the butt gap c is 3mm. High-strength steel wire ignites the arc at the root of the groove. The wire is fed at a wire feeding speed of 6.0m / min and moves in the +Y direction at a speed of 30cm / min to melt and complete the filling of the base layer.

[0042] (2) The high-strength steel wire ignites an arc on the groove surface near the -X direction. The wire is fed at a wire feeding speed of 6.0m / min and moves in the +Y direction at a speed of 30cm / min to melt and form a high-strength steel filling area with a length of 25mm. The high-content tungsten carbide wire is switched and fed at a wire feeding speed of 3.6m / min and moves in the +Y direction at a speed of 30cm / min to melt and form a tungsten carbide filling area with a length of 25mm. In this way, the two types of wires are switched and fed in a cycle. The high-strength steel molten filling area and the high-content tungsten carbide molten filling area of the filling weld are switched in a ratio of 1:1 until the first weld of the first layer of the filling layer is completed. The high-content tungsten carbide wire is fed to the starting point of the second adjacent weld bead in the same layer at a wire feeding speed of 3.6m / min, and moves in the +Y direction at a speed of 30cm / min to melt to form a tungsten carbide filling area with a length of 25mm. The high-strength steel wire is switched and fed at a wire feeding speed of 6.0m / min, and moves in the +Y direction at a speed of 30cm / min to melt to form a high-strength steel filling area with a length of 25mm. In this way, the two types of wires are switched and fed in a cycle. The high-strength steel molten filling area and the high-content tungsten carbide molten filling area are also switched in a ratio of 1:1 until the second weld bead of the first layer of the filling layer is completed and the first weld bead of the filling layer is filled, forming a high-strength steel-tungsten carbide distributed filling layer. The high-strength steel wire is fed to the arc extinguishing position of the first weld of the first layer of the filling layer at a wire feeding speed of 6.0 m / min, and moves in the -Y direction at a speed of 30 cm / min to melt, completing the first, second and third welds in sequence. The filling of the second weld of the filling layer is completed, forming a single high-strength steel wire melt filling layer. The entire filling layer area is completed, forming a double-layer filling layer structure consisting of a high-strength steel-tungsten carbide distributed single filling layer and a single high-strength steel single filling layer.

[0043] (3) Then, the high-strength steel wire is fed at a wire feeding speed of 6.0 m / min and moved in the +Y direction at a speed of 30 cm / min to melt and form a high-strength steel cover area with a length of 30 mm. The high-content tungsten carbide wire is switched and fed at a wire feeding speed of 3.6 m / min and moved in the +Y direction at a speed of 30 cm / min to melt and form a high-content tungsten carbide cover area with a length of 15 mm. The high-strength steel melt cover area of the filler weld and the high-content tungsten carbide melt cover area are switched in a ratio of 2:1 until the first high-strength steel-tungsten carbide alternating distribution cover layer is formed. Next, the high-content tungsten carbide wire is fed at the starting point of the second adjacent weld bead in the same layer at a wire feeding speed of 3.6m / min, and moves in the +Y direction at a speed of 30cm / min to melt first to form a tungsten carbide melt capping area with a length of 15mm. The high-strength steel wire is switched to be fed at a wire feeding speed of 6.0m / min and moves in the +Y direction at a speed of 30cm / min to melt to form a high-strength steel capping area with a length of 30mm. The high-strength steel melt capping area of the filler weld and the high-content tungsten carbide melt capping area are also switched in a ratio of 2:1 until the second pass of the high-strength steel-tungsten carbide alternating distribution capping layer is formed. After that, the third capping layer weld is filled in the same way as the first capping layer weld, and the fourth capping layer weld is filled in the same way as the second capping layer weld. The entire capping layer is completed, forming a capping layer structure of alternating high-strength steel and tungsten carbide, thereby finally completing the distributed tungsten carbide reinforced high-strength steel butt weld structure of the entire weld.

[0044] The two kinds of alternately melt-filled wires are high-content tungsten carbide wire and high-strength steel wire. The high-content tungsten carbide wire is a powder core wire with a diameter of 1.6 mm and a mass fraction of tungsten carbide particles of 30%. The wire feeding speed V w2 The high-strength steel wire is a solid wire with a diameter of 1.2 mm and a grade of ER49-1. The wire feeding speed is V w1 It is 6.0m / min.

[0045] The two alternating melt-filled wires are high-content tungsten carbide wire and high-strength steel wire. The high-content tungsten carbide wire has a dry extension length of 17 mm and is welded using a pulsed welding process. The high-strength steel wire has a dry extension length of 13 mm and is welded using a pulsed welding process. The travel speed for both wires is 30 cm / min.

[0046] The length of the overlapping area between the arc striking position of the high content tungsten carbide melting area and the arc extinguishing position of the high strength steel melting area is W a The overlapping area length W between the arc striking position of the high-strength steel melting area and the arc extinguishing position of the high-content tungsten carbide melting area is 2 mm. b 2mm.

[0047] Example 2

[0048] The enhanced butt weld structure of the present invention is manufactured by a double-wire consumable electrode argon arc welding method, wherein the shielding gas used for tungsten carbide wire is 95% Ar + 5% CO2 with a gas flow rate of 25 L / min, and the shielding gas used for high-strength steel wire is 82% Ar + 18% CO2 with a gas flow rate of 25 L / min.

[0049] The distributed tungsten carbide reinforced high-strength steel butt weld structure is a high-strength steel butt joint, and the weld filler metal tungsten carbide is distributed in multiple layers and multiple passes;

[0050] High content of tungsten carbide is alternately distributed in high-strength steel welds;

[0051] The base layer of the welded joint structure is a single high-strength steel wire fusion weld;

[0052] The weld joint structure features alternating high-strength steel wire and high-content tungsten carbide wire in the filler layers. The high-strength steel and high-content tungsten carbide filler layers are staggered in the X, Y, and Z directions, with the tungsten carbide filler layer predominant. A single high-strength steel wire filler layer is interspersed between layers. Welding directions are the same for welds on the same layer, and opposite for welds on adjacent layers.

[0053] The weld joint's structural cap layer also features alternating high-strength steel wire melt capping areas and high-content tungsten carbide wire melt capping areas. These areas alternate in the X and Y directions, with the high-strength steel filler area accounting for a higher proportion. Adjacent welds are welded in the same direction.

[0054] To enhance the butt weld structure, the thickness d of the high-strength steel plate used for butt welding is 30 mm, and the tensile strength of the high-strength steel is 1400 MPa.

[0055] The butt weld structure is enhanced, the applicable material is high-strength steel of armor material, and the groove form is V-shaped.

[0056] To enhance the butt weld structure, in each weld bead of the high-strength steel-tungsten carbide single filling layer of the welded joint structure, the switching length ratio K1 in the Y direction of the high-strength steel wire molten filling area W1 and the high-content tungsten carbide wire molten filling area W2 is 1:3.

[0057] To enhance the butt weld structure, in each weld bead of the cover layer of the welded joint structure, the switching length ratio K2 in the Y direction between the high-strength steel wire melt cover area W3 and the high-content tungsten carbide wire melt cover area W4 is 9:1.

[0058] Combine Figures 1 to 3 The manufacturing method of the distributed tungsten carbide reinforced high-strength steel butt weld structure includes the following specific steps:

[0059] (1) Make a V-shaped groove on the steel plate to be welded and grind the groove. The groove angle α is 60° and the blunt edge p is 2mm. Use acid and alkali cleaning solution to remove surface oil and oxide film within a range of about 50mm on both sides of the steel plate groove, wash with water and wipe with acetone. Use a low-temperature heat treatment furnace to preheat the steel plate before welding, and the preheating temperature is 150℃. Use flexible tooling to butt and fix the steel plates before welding, and the butt gap c is 4mm. High-strength steel wire ignites the arc at the root of the groove. The wire is fed at a wire feeding speed of 7.0m / min and moves in the +Y direction at a speed of 35cm / min to melt and complete the filling of the base layer.

[0060] (2) The high-strength steel wire ignites an arc on the groove surface close to the -X direction. The wire is fed at a wire feeding speed of 7.0m / min and moves in the +Y direction at a speed of 35cm / min to melt and form a high-strength steel filling area with a length of 15mm. The high-content tungsten carbide wire is switched and fed at a wire feeding speed of 4.0m / min and moves in the +Y direction at a speed of 35cm / min to melt and form a tungsten carbide filling area with a length of 45mm. In this way, the two types of wires are switched and fed in a cycle. The high-strength steel molten filling area and the high-content tungsten carbide molten filling area of the filling weld are switched in a ratio of 1:3 until the first weld of the first layer of the filling layer is completed. The high-content tungsten carbide wire is fed to the starting point of the second adjacent weld in the same layer at a wire feeding speed of 4.0m / min, and moves in the +Y direction at a speed of 35cm / min to melt to form a tungsten carbide filling area with a length of 45mm. The high-strength steel wire is switched and fed at a wire feeding speed of 7.0m / min, and moves in the +Y direction at a speed of 35cm / min to melt to form a high-strength steel filling area with a length of 15mm. In this way, the two types of wires are switched and fed in a cycle. The high-strength steel melting filling area and the high-content tungsten carbide melting filling area are also switched in a ratio of 1:3 until the second weld of the first layer of the filling layer is completed. The first layer of the filling layer weld is filled and a high-strength steel-tungsten carbide distribution filling layer is formed. The high-strength steel wire is fed at a wire feed speed of 7.0 m / min to the arc extinguishing position of the first weld of the first filling layer, and melted in the -Y direction at a speed of 35 cm / min. The first, second, and third welds are completed in sequence, and the filling of the second weld of the filling layer is completed, forming a single high-strength steel wire melt filling layer. After that, the third weld of the filling layer is filled with a total of 4 welds in the same manner as the first weld of the filling layer, and the fourth weld of the filling layer is filled with a total of 5 welds in the same manner as the second weld of the filling layer. The entire filling layer area is completed, forming a 4-layer filling layer structure alternating between a high-strength steel-tungsten carbide distributed single filling layer and a single high-strength steel single filling layer.

[0061] (3) Then, the high-strength steel wire is fed at a wire feeding speed of 7.0 m / min and moved in the +Y direction at a speed of 35 cm / min to melt in advance to form a high-strength steel cover area with a length of 90 mm. The high-content tungsten carbide wire is switched to be fed at a wire feeding speed of 4.0 m / min and moved in the +Y direction at a speed of 35 cm / min to melt in order to form a high-content tungsten carbide cover area with a length of 10 mm. The high-strength steel melt cover area of the filler weld and the high-content tungsten carbide melt cover area are switched in a ratio of 9:1 until the first high-strength steel-tungsten carbide alternating distribution cover layer is formed. Next, the high-content tungsten carbide wire is fed to the starting point of the second adjacent weld in the same layer at a wire feeding speed of 4.0 m / min, and moves in the +Y direction at a speed of 35 cm / min to melt first to form a tungsten carbide melt cover area with a length of 10 mm. The high-strength steel wire is switched and fed at a wire feeding speed of 7.0 m / min, and moves in the +Y direction at a speed of 35 cm / min to melt to form a high-strength steel cover area with a length of 90 mm. The high-strength steel melt cover area of the filler weld and the high-content tungsten carbide melt cover area are also switched in a ratio of 9:1 until the second cover layer of high-strength steel and tungsten carbide alternating distribution is formed. Afterwards, the 3rd and 5th welds of the cover layer are filled in the same way as the 1st weld of the cover layer, and the 4th and 6th welds of the cover layer are filled in the same way as the 2nd weld of the cover layer. The entire cover layer is completed, forming a cover layer structure with alternating distribution of high-strength steel and tungsten carbide, thereby finally completing the distributed tungsten carbide reinforced high-strength steel butt weld structure of the entire weld.

[0062] The two kinds of alternately melt-filled wires are high-content tungsten carbide wire and high-strength steel wire. The high-content tungsten carbide wire is a powder core wire with a diameter of 1.6 mm and a mass fraction of tungsten carbide particles of 40%. The wire feeding speed V w2 The high-strength steel wire is a solid wire with a diameter of 1.2 mm and a grade of ER50-6. The wire feeding speed is V w1 It is 7.0m / min.

[0063] The two alternating melt-filled wires are high-content tungsten carbide wire and high-strength steel wire. The high-content tungsten carbide wire has a dry extension length of 17mm and is welded using a pulsed welding process. The high-strength steel wire has a dry extension length of 13mm and is welded using a non-pulsed DC welding process. The travel speed for both wires is 35cm / min.

[0064] The length of the overlapping area between the arc striking position of the high content tungsten carbide melting area and the arc extinguishing position of the high strength steel melting area is W a The overlapping area length W between the arc striking position of the high-strength steel melting area and the arc extinguishing position of the high-content tungsten carbide melting area is 3 mm. b 3mm.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, replacement, improvement, etc. made under the principles of the present invention should be within the scope of protection of the present invention.

Claims

1. A distributed tungsten carbide reinforced high-strength steel butt weld structure, characterized by: The weld joint structure is a high-strength steel butt joint, and the weld filler metal is tungsten carbide distributed in multiple layers and multiple passes; High content of tungsten carbide is alternately distributed in high-strength steel welds; The base layer of the welded joint structure is a single high-strength steel wire fusion weld; The filling layer of the weld joint structure is an alternating distribution structure of high-strength steel wire and high-content tungsten carbide wire. The high-strength steel filling area and the high-content tungsten carbide filling area are staggered in the X, Y and Z directions, with the tungsten carbide filling area accounting for a higher proportion. Among them, a single high-strength steel wire melt filling layer is interspersed between layers. The welding direction of the welds on the same layer is the same, and the welding direction of the welds between adjacent layers is opposite. The weld joint structure cover layer is composed of alternating distribution of high-strength steel wire melt cover area and high-content tungsten carbide wire melt cover area. The high-strength steel melt cover area and the high-content tungsten carbide melt cover area show alternating characteristics in the X and Y directions, with the high-strength steel filling area accounting for a higher proportion. The welding direction of adjacent welds is the same. The transverse X direction refers to the direction perpendicular to the length of the butt weld; the longitudinal Y direction refers to the length of the butt weld; and the vertical Z direction refers to the depth direction of the butt weld, that is, the thickness direction of the plate.

2. The distributed tungsten carbide reinforced high-strength steel butt weld structure according to claim 1, characterized in that: Thickness of high-strength steel plates for butt welding d The thickness is 20~40mm, and the tensile strength of high-strength steel is greater than 1200MPa.

3. The distributed tungsten carbide reinforced high-strength steel butt weld structure according to claim 1, characterized in that: The high-strength steel is armored high-strength steel, and the groove form is V-shaped or X-shaped.

4. The distributed tungsten carbide reinforced high-strength steel butt weld structure according to claim 1, characterized in that: In each weld bead of the high-strength steel-tungsten carbide single filler layer welded joint structure, the high-strength steel wire melts and fills the area W 1 Filling area with high content tungsten carbide wire W 2 Switch length scale in Y direction K 1 It is 1:1~1:

3.

5. The distributed tungsten carbide reinforced high-strength steel butt weld structure according to claim 1, characterized in that: In each weld bead of the welded joint structure cover layer, the high-strength steel wire melts the cover area W 3 Melt the capping area with high content tungsten carbide wire W 4 Switch length scale in Y direction K 2 It is 2:1~9:

1.

6. A method for manufacturing a distributed tungsten carbide reinforced high-strength steel butt weld structure according to any one of claims 1 to 5, characterized in that: The specific steps include: (1) High-strength steel wire ignites the arc at the root of the groove, and the wire is fed at the wire feeding speed. V w1 Move in the +Y direction to melt and complete the filling of the base layer; (2) The high-strength steel wire ignites the arc on the groove surface near the -X direction, and the wire is fed at a speed of V w1 Move in the +Y direction to melt and form a length of W 1 High-strength steel filling area; switch high-content tungsten carbide wire according to wire feeding speed V w2 Move in the +Y direction to melt and form a length of W 2 Tungsten carbide filling area; in this way, the two kinds of wire materials are switched and fed to fill the high-strength steel melting filling area of the weld. W 1 Filled area with high tungsten carbide content W 2 According to the proportion K 1 Switch until the first pass of the first layer of the filling layer is completed; the high-content tungsten carbide wire is at the starting point of the second adjacent pass of the same layer according to the wire feeding speed V w2 It is fed and moves in the +Y direction to melt and form a length of W 2 Tungsten carbide filling area; switch control high strength steel wire according to wire feeding speed V w1 Move in the +Y direction to melt and form a length of W 1 High-strength steel filling area; in this way, the two kinds of wire materials are switched and sent to the high-strength steel melting filling area W 1 Filled area with high tungsten carbide content W 2 Also in proportion K 1 Switch until the second weld of the first layer of the filling layer is completed; then the odd-numbered welds of the same layer are filled in the same way as the first weld, and the even-numbered welds of the same layer are filled in the same way as the second weld, until the last weld near the +X side groove is completed, the first weld of the filling layer is filled, and a high-strength steel-tungsten carbide distribution filling layer is formed; the high-strength steel wire is at the arc extinguishing position of the first weld of the first layer of the filling layer according to the wire feeding speed V w1 Feed and move in the -Y direction to melt, and complete the first pass, the second pass, ..., until the first pass near the +X side groove is completed. n The second filler layer is filled with a single high-strength steel wire melt filling layer; then the high-strength steel-tungsten carbide distribution single filling layer and the single high-strength steel single filling layer are alternately distributed and filled in the Z direction, and each layer is respectively carried out according to the high-strength steel-tungsten carbide distribution single filling layer weld bead switching rule and the single high-strength steel single filling layer rule, until the entire filling layer area is completed, forming a multi-filling layer structure in which the high-strength steel-tungsten carbide distribution single filling layer and the single high-strength steel single filling layer are alternately distributed; (3) High-strength steel wire according to wire feeding speed V w1 Move in the +Y direction to melt first to form a length of W 3 High-strength steel cover area, switch high-content tungsten carbide wire according to wire feeding speed V w2 Move in the +Y direction to melt and form a length of W 4 High content tungsten carbide cover area, filler weld high strength steel melt cover area W 3 Melt capping area with high content of tungsten carbide W 4 According to the proportion K 2 Switch until the first pass of the high-strength steel-tungsten carbide alternating distribution cover layer is formed; then, the high-content tungsten carbide wire is fed at the starting point of the second adjacent weld in the same layer according to the wire feeding speed. V w2 Feed it and move it in the +Y direction to melt it first to form a length of W 4 The tungsten carbide melts the cover area, switching and controlling the high-strength steel wire according to the wire feeding speed V w1 Move in the +Y direction to melt and form a length of W 3 High-strength steel cover area, filling weld high-strength steel melt cover area W 3 Melt capping area with high content of tungsten carbide W 4 Also in proportion K 2 Switch until the second pass of the cover layer with alternating distribution of high-strength steel and tungsten carbide is formed; then the odd-numbered welds of the cover layer are filled in the same way as the first weld of the cover layer, and the even-numbered welds of the cover layer are filled in the same way as the second weld of the cover layer, until the entire cover layer is completed, forming a cover layer structure with alternating distribution of high-strength steel and tungsten carbide, thereby finally completing the distributed tungsten carbide reinforced multi-layer and multi-pass high-strength steel butt weld structure of the entire weld.

7. The manufacturing method according to claim 6, characterized in that: The two kinds of alternately melt-filled wires are high-content tungsten carbide wire and high-strength steel wire. The wire feeding speed of high-content tungsten carbide wire is V w2 3.6~4.5m / min; high strength steel wire feeding speed V w1 5.0~8.0m / min.

8. The manufacturing method according to claim 6, wherein: The tungsten carbide filling volume ratio in high-content tungsten carbide wire is 25~50%.

9. The manufacturing method according to claim 6, wherein: The length of the overlapping area between the arc striking position of the high-content tungsten carbide melting area and the arc extinguishing position of the high-strength steel melting area W a The overlap length between the arc striking position of the high-strength steel melting area and the arc extinguishing position of the high-content tungsten carbide melting area is 2~10mm. W b 2~10mm.

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