CN111702295A - Method for preparing wear-resistant composite steel plate - Google Patents
Method for preparing wear-resistant composite steel plate Download PDFInfo
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- CN111702295A CN111702295A CN202010490152.XA CN202010490152A CN111702295A CN 111702295 A CN111702295 A CN 111702295A CN 202010490152 A CN202010490152 A CN 202010490152A CN 111702295 A CN111702295 A CN 111702295A
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- 239000010959 steel Substances 0.000 title claims abstract description 56
- 239000002131 composite material Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000003466 welding Methods 0.000 claims abstract description 120
- 239000000463 material Substances 0.000 claims abstract description 29
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- 239000012535 impurity Substances 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 229910000746 Structural steel Inorganic materials 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims description 17
- 230000004927 fusion Effects 0.000 claims description 12
- 230000004907 flux Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 9
- 238000010891 electric arc Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000011651 chromium Substances 0.000 description 7
- 210000001503 joint Anatomy 0.000 description 7
- 239000011572 manganese Substances 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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Classifications
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- 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
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a method for preparing a wear-resistant composite steel plate, which comprises the steps of selecting a structural steel substrate with the thickness of 3-12mm as a plate to be welded, and welding a wear-resistant layer on the plate to be welded in an arc welding mode by adopting a full-automatic special welding machine and a flux-cored wire; the flux-cored wire is composed of the following wear-resistant materials, wherein the wear-resistant materials comprise the following chemical components in percentage by weight: 4.0 to 5.20% of C, 21.0 to 28.0% of Cr, 0.35 to 0.50% of Mn, 1.0 to 1.5% of Si, 0.15 to 0.25% of V, 0.05 to 0.1% of Y, and the balance of Fe and inevitable impurities. The method directly fills the wear-resistant material on the hollow flux-cored wire, adopts a self-made full-automatic special welding machine and the flux-cored wire to weld the wear-resistant layer in an arc welding mode, and the prepared composite wear-resistant plate has the advantages of good welding strength, no crack, uniform hardness, flat and attractive surface, fine and dense tissue, excellent wear resistance and the like.
Description
Technical Field
The invention relates to the technical field of composite steel plates, in particular to a method for preparing a wear-resistant composite steel plate.
Background
The wear-resistant steel plate is widely applied to the industries of thermal power, cement, steel, metallurgy and the like with high wear resistance, such as a coal mill, a coal conveying pipe, a chute, a hopper, an elbow and the like; vertical mill, chute, fan, powder concentrator, roller press, hopper, etc.; blast furnace chute, vibrating screen, dust-removing air duct, pellet slideway, cooling sieve plate of sintering plant, etc.; buckets, crushers, screens, screw conveyors, and the like. Meanwhile, the wear-resistant steel is usually a welded structural member, which requires that the base material of the wear-resistant steel has excellent wear resistance and the position of a welded joint also has excellent comprehensive properties. The high-strength wear-resistant steel plate has high carbon content, and simultaneously, Cr, Mo, B and other alloy elements for improving hardenability and hardenability are added, so that the hardness and brittleness are high, and the cold crack sensitivity of the high-strength wear-resistant steel is improved.
During welding, due to the action of welding heat cycle, a heat-affected coarse crystal area of the welded joint is overheated, austenite grains are seriously coarsened, and a coarse hardened martensite structure is generated in a post-welding rapid cooling process, so that the heat-affected coarse crystal area becomes one of the main cold crack sensitive areas of the steel welded joint. In order to prevent the generation of cold cracks, the welding construction efficiency is often reduced and the construction conditions are often deteriorated, for example, the processes of high-temperature preheating before welding and heat treatment after welding are adopted, so that the complexity of the welding process and the inoperability under special conditions are increased, the safety and the reliability of a welding structure are damaged, and the welding problem is particularly obvious for the wear-resistant steel plate with high strength. The wear-resistant layer material is directly paved on a weld bead of a steel plate in the current welding process of the wear-resistant steel plate, and then the wear-resistant plate is obtained by welding the weld bead in a swinging mode through a solid welding wire. The technical difficulty is high for enabling the weld metal and the base metal to be matched in an equal strength mode, even if the weld is equal in strength, the ductility and toughness of the weld are often reduced to an unacceptable degree, the crack resistance is also obviously reduced, in order to prevent welding cracks, the requirements on construction conditions are extremely strict, and the cost is greatly increased. The welding problem of the wear-resistant steel always troubles welding workers at home and abroad, and is mainly characterized by strong wear resistance, higher strength and hardness, poor weldability and higher welding cracking probability. Therefore, how to improve the strength, crack resistance, wear resistance and the like of the wear-resistant steel plate by improving the welding process is an effective way.
Disclosure of Invention
The invention provides a method for preparing a wear-resistant composite steel plate, aiming at the problems existing in the welding of the existing composite wear-resistant steel plate. The method directly fills the wear-resistant material on the hollow flux-cored wire, adopts a fully-automatic special welding machine designed by the company and the flux-cored wire to weld the wear-resistant layer in an arc welding mode, and the prepared composite wear-resistant plate has the advantages of good welding strength, no crack, uniform hardness, flat and attractive surface, fine and dense tissue, excellent wear resistance and the like.
In order to achieve the above purpose, the method adopts the following technical method:
a method for preparing a wear-resistant composite steel plate is characterized by comprising the following steps: the method comprises the following steps: selecting a structural steel substrate with the thickness of 3-12mm as a plate to be welded, and welding a wear-resistant layer on the plate to be welded in an arc welding mode by adopting a full-automatic special welding machine and a flux-cored wire; the flux-cored wire is composed of the following wear-resistant materials, wherein the wear-resistant materials comprise the following chemical components in percentage by weight: 4.0 to 5.20% of C, 21.0 to 28.0% of Cr, 0.35 to 0.50% of Mn, 1.0 to 1.5% of Si, 0.15 to 0.25% of V, 0.05 to 0.1% of Y, and the balance of Fe and inevitable impurities.
Further, the thickness ratio of the wear-resistant layer to the to-be-welded plate is 1: 0.5-2.
Furthermore, the flux core of the flux-cored wire is of a hollow structure, and the hollow flux core is filled with the wear-resistant material.
Further, the process conditions of the arc welding and fusion welding are as follows: the voltage is 30-31V, the current is 350-380A, the wire feeding is 100-200g/min, and the walking speed is 150-200 mm/min.
Furthermore, the full-automatic special welding machine comprises a machine table, a base plate feeding end, a wear-resistant composite steel plate discharging end, a welding machine and a control cabinet; the two ends of the machine platform are respectively a base plate feeding end and a wear-resistant composite steel plate discharging end, the machine platform is connected with a welding machine and a control cabinet, and the control cabinet is also connected with the welding machine; a pressing plate is also arranged on the machine table, and a plurality of pressing cylinders are also arranged on the pressing plate; the welding machine comprises a flux-cored wire, a wire feeding barrel, a wire feeding motor and a welding machine port, wherein the flux-cored wire is placed on the wire feeding barrel and is connected with the welding machine port through the wire feeding motor, a guide rail is arranged between a base plate feeding end and a wear-resistant composite steel plate discharging end, and the welding machine port is arranged on the guide rail and is arranged above the base plate feeding end.
Further, the wire feeding barrel is also connected with a motor of the rotary wire feeding barrel.
Furthermore, a guide wire sleeve is further arranged at one end of the flux-cored wire connected with the welding machine opening.
Compared with the prior art, the invention has the advantages and beneficial effects that:
1. the method directly fills the wear-resistant material on the hollow flux-cored wire, adopts a fully-automatic special welding machine designed by the company and the flux-cored wire to weld the wear-resistant layer in an arc welding mode, and the prepared composite wear-resistant plate has the advantages of good welding strength, no crack, uniform hardness, flat and attractive surface, fine and dense tissue, excellent wear resistance and the like.
2. According to the invention, the wear-resistant material consisting of C, Cr, Mn, Si, V and Y and the balance of Fe is welded on the structural steel substrate, and the mixture formed by mixing chromium carbide, vanadium, manganese, silicon and yttrium with iron can obviously improve the strength and wear resistance of the steel plate.
3. The method utilizes a full-automatic special welding machine and a flux-cored wire manufactured by the company to weld the wear-resistant layer in an arc welding mode, the provided equipment can form the wear-resistant layer with fine structure and good wear resistance on the base plate, the surface of the welded wear-resistant layer is smooth and attractive, cracks can not appear, the fusion condition of a welding joint is good, no welding defects exist at the joint of a cover layer welding line and a filling layer welding line and at a fusion line, the welding strength and the impact resistance are good, no powder is required to be added in the production process, the high quality of the product can be continuously ensured, the production efficiency is high, the equipment structure is simple, the cost is lower, and the service life is long. Then, welding is performed by arc welding, whereby a wear-resistant layer having excellent and all-round wear-resistant characteristics is obtained by forming wide and smooth beads having excellent stress dispersion. The fine cracks generated on the wear-resistant layer are generated by eliminating stress, so that the wear-resistant property is not damaged completely, and the cracks do not spread to the substrate.
4. The hardness of the wear-resistant composite board produced by the method reaches above 58HRC, and the wear-resistant composite board can be used as an excellent wear-resistant board material in the fields of thermal power, cement, steel, mine metallurgy and the like, and has a wide market prospect.
Drawings
FIG. 1 is a schematic structural diagram of a full-automatic special welding machine according to the present invention;
FIG. 2 is an enlarged view of the structure of the welder.
Reference numerals: 1-machine table, 2-discharge end of wear-resistant composite steel plate, 3-feed end of base plate, 4-welding machine, 5-control cabinet, 6-guide rail, 7-flux-cored wire, 8-wire feeding barrel, 9-motor of rotary wire feeding barrel, 10-wire guiding sleeve, 11-wire feeding motor, 12-welding machine opening, 13-compaction cylinder and 14-compaction plate.
FIG. 3 is a comparison of the welding process of the present invention and the prior art.
Fig. 4 is a diagram illustrating the effect of the welding process of the present invention and the wear plate of the prior art.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
The full-automatic special welding machine used in the scheme of the invention is researched by the company, and the specific structure is shown in attached figures 1 and 2. The device comprises a machine table 1, a base plate feeding end 3, a wear-resistant composite steel plate discharging end 2, a welding machine 4 and a control cabinet 5; the two ends of the machine table are respectively a base plate feeding end 3 and a wear-resistant composite steel plate discharging end 2, the machine table 1 is connected with a welding machine 4 and a control cabinet 5, and the control cabinet 5 is further connected with the welding machine 4. The machine table 1 mainly bears the inlet and outlet of a welding plate, a structural steel substrate is fed from a substrate feeding end 3, a composite wear-resistant plate is formed after welding through a welding machine, and then the structural steel substrate is fed out from a wear-resistant composite steel plate discharging end 2, a control cabinet 5 is mainly responsible for starting and stopping of equipment, adjusting of welding process parameters and the like, a welding machine 4 melts solder and a welded material on a welding wire through power supply action, and high-temperature electric arcs are generated when positive and negative poles are in instant short circuit, so that the purpose of combining the contacted materials is achieved. A pressing plate 14 is further arranged on the machine table 1, and a flat plate is connected to the position of the air cylinder shrinkage rod to press and weld the plate; the pressing plate 14 is also provided with a plurality of pressing cylinders 13, so that the base plate can deform to cause movement due to the action of thermal stress in the surfacing welding process, and welding deformation can be prevented by the pressing cylinders 13 and the pressing plate 14. The welding machine 4 comprises a flux-cored wire 7, a wire feeding barrel 8, a wire feeding motor 11 and a welding machine port 12, wherein the welding machine port 12 mainly carries out surfacing welding on the flux-cored wire 7, the wire feeding barrel 8 is used for containing the produced flux-cored wire 7, the wire feeding motor 11 drives the flux-cored wire 7 of the wire feeding barrel 8, and the wire feeding is carried out surfacing welding. Flux cored wire 7 is put on sending a bucket 8 to be connected with welding machine mouth 12 through sending a motor 11, be equipped with guide rail 6 between base plate feed end 3 and the wear-resisting clad steel plate discharge end 2, welding machine mouth 12 is established on guide rail 6, and guide rail 6 mainly bears welding machine mouth 12 and carries out the welding removal in horizontal position, and establishes the top at base plate feed end 3. The wire feeding barrel 8 is also connected with a rotary wire feeding barrel motor 9 which drives the welding wire barrel to rotate, so that feeding is facilitated. The flux-cored wire 7 is also provided with a wire guide sleeve at one end connected with the welding machine port 12, so that the effect of assisting wire feeding can be achieved, and the adverse welding effect caused by the bending and breaking of the welding wire in the wire feeding process can be avoided.
Example 1
A method for preparing a wear-resistant composite steel plate comprises the following steps: the method comprises the following steps:
selecting a JS-700 structure steel substrate with the thickness of 6mm as a plate to be welded, combining thick plates into 6mm and 6mm, testing the plate size width of 1500 multiplied by 3000mm, and welding a wear-resistant layer on the plate to be welded in an electric arc welding mode by adopting a self-made full-automatic special welding machine and a flux-cored wire; the flux-cored wire is composed of the following wear-resistant materials, wherein the wear-resistant materials comprise the following chemical components in percentage by weight: 5.3% of C, 26.3% of Cr, 0.35% of Mn, 1.2% of Si, 0.18% of V, 0.09% of Y, and the balance of Fe and inevitable impurities. The flux core of the flux-cored wire is of a hollow structure, and the hollow flux core is filled with wear-resistant materials. The process conditions of the electric arc welding and fusion welding are as follows: the voltage is 30-31V, the current is 350-380A, the wire feeding is 125g/min, and the walking speed is 187.5 mm/min.
As shown in fig. 3, the welding of this embodiment adopts self-produced flux-cored welding as shown in fig. 3 (a), the welding of a solid wire as shown in fig. 3 (B) is adopted in a common process, powder needs to be uniformly added on a welding pass in the production process, the product quality stability is poor, and cracks are easy to appear as shown in fig. 4 (B). The wear-resistant material is directly filled on the hollow medicine core, and no powder is required to be added in the production process, so that the high quality of the product can be continuously ensured. The texture structure is shown in figure 4, and the wear-resisting plate produced by the invention has fine texture as shown in figure 4 (A) and has no fracture defects.
The mechanical property of the butt joint of the prepared wear-resistant composite steel plate is detected according to a conventional method, and the mechanical property of the joint is as follows: tensile strength Rm: 1087MPa, the-20 ℃ impact energy of the weld joint reaches 97J, the-20 ℃ impact energy of the wear-resistant steel end in the fusion zone reaches 103J, and the hardness is 66 HRC.
Example 2 a method of manufacturing a wear resistant clad steel sheet: the method comprises the following steps:
selecting a JS-700 structure steel substrate with the thickness of 6mm as a plate to be welded, combining thick plates into 6+4mm, testing the plate size width and length to be 1500 multiplied by 3000mm, and welding a wear-resistant layer on the plate to be welded in an arc welding mode by adopting a self-made full-automatic special welding machine and a flux-cored wire; the flux-cored wire is composed of the following wear-resistant materials, wherein the wear-resistant materials comprise the following chemical components in percentage by weight: 4.8% of C, 26.3% of Cr, 0.45% of Mn, 1.0% of Si, 0.22% of V, 0.08% of Y, and the balance of Fe and inevitable impurities. The flux core of the flux-cored wire is of a hollow structure, and the hollow flux core is filled with wear-resistant materials. The process conditions of the electric arc welding and fusion welding are as follows: the voltage is 30-31V, the current is 350-380A, the wire feeding is 150g/min, and the walking speed is 150 mm/min.
The mechanical property of the butt joint of the prepared wear-resistant composite steel plate is detected according to a conventional method, and the mechanical property of the joint is as follows: tensile strength Rm: 982MPa, the-20 ℃ impact energy of the weld joint reaches 94J, the-20 ℃ impact energy of the wear-resistant steel end in the fusion zone reaches 96J, and the hardness is 59 HRC.
Example 3
A method for preparing a wear-resistant composite steel plate comprises the following steps: the method comprises the following steps:
selecting a JS-750 structure steel substrate with the thickness of 10mm as a plate to be welded, combining thick plates into 10+20mm, testing the plate size width and length to be 1500 multiplied by 3000mm, and welding a wear-resistant layer on the plate to be welded in an arc welding mode by adopting a self-made full-automatic special welding machine and a flux-cored wire; the flux-cored wire is composed of the following wear-resistant materials, wherein the wear-resistant materials comprise the following chemical components in percentage by weight: 5.1% of C, 24.3% of Cr, 0.42% of Mn, 1.4% of Si, 0.18% of V, 0.06% of Y, and the balance of Fe and inevitable impurities. The flux core of the flux-cored wire is of a hollow structure, and the hollow flux core is filled with wear-resistant materials. The process conditions of the electric arc welding and fusion welding are as follows: the voltage is 30-31V, the current is 350-380A, the wire feeding is 135g/min, and the walking speed is 150 mm/min.
The mechanical property of the butt joint of the prepared wear-resistant composite steel plate is detected according to a conventional method, and the mechanical property of the joint is as follows: tensile strength Rm: 1032MPa, the-20 ℃ impact energy of the weld joint reaches 98J, the-20 ℃ impact energy of the wear-resistant steel end in the fusion area reaches 95J, and the hardness is 63 HRC.
Comparative example 1
This comparative example is not used in example 1: the welding equipment used was a solid wire pipe welder, and the other processes were the same as in example 1. The mechanical properties of the butt joint of the prepared wear-resistant composite steel plate are detected according to a conventional method, and the mechanical properties of the butt joint are as follows: tensile strength Rm: 824MPa, the-20 ℃ impact energy of the weld joint reaches 78J, the-20 ℃ impact energy of the wear-resistant steel end in the fusion zone reaches 83J, and the hardness is 53 HRC.
Comparative example 2
This comparative example differs from example 1 in that: the wear-resistant material comprises the following chemical components in percentage by weight: 5.3% of C, 26.3% of Cr, 0.35% of Mn, 1.2% of Si, and the balance of Fe and inevitable impurities. The mechanical properties of the butt joint of the prepared wear-resistant composite steel plate are detected according to a conventional method, and the mechanical properties of the butt joint are as follows: tensile strength Rm: 963MPa, the impact energy of the weld joint at minus 20 ℃ reaches 93J, the impact energy of the wear-resistant steel end at minus 20 ℃ in the fusion zone reaches 95J, and the hardness is 62 HRC.
In conclusion, the wear-resistant material is directly filled on the hollow flux-cored wire, and the full-automatic special welding machine and the flux-cored wire manufactured by the company are adopted to weld the wear-resistant layer in an arc welding mode, so that the manufactured composite wear-resistant plate has the advantages of good welding strength, no crack, uniform hardness, smooth and attractive surface, fine and dense tissue, excellent wear resistance and the like.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and such substitutions and modifications are to be considered as within the scope of the invention.
Claims (7)
1. A method for preparing a wear-resistant composite steel plate is characterized by comprising the following steps: the method comprises the following steps: selecting a structural steel substrate with the thickness of 3-12mm as a plate to be welded, and welding a wear-resistant layer on the plate to be welded in an arc welding mode by adopting a full-automatic special welding machine and a flux-cored wire; the flux-cored wire is composed of the following wear-resistant materials, wherein the wear-resistant materials comprise the following chemical components in percentage by weight: 4.0 to 5.20% of C, 21.0 to 28.0% of Cr, 0.35 to 0.50% of Mn, 1.0 to 1.5% of Si, 0.15 to 0.25% of V, 0.05 to 0.1% of Y, and the balance of Fe and inevitable impurities.
2. The method of manufacturing a wear-resistant composite steel plate according to claim 1, wherein: the thickness ratio of the wear-resistant layer to the to-be-welded plate is 1: 0.5-2.
3. The method of manufacturing a wear-resistant composite steel plate according to claim 1, wherein: the flux core of the flux-cored wire is of a hollow structure, and the hollow flux core is filled with wear-resistant materials.
4. The method of manufacturing a wear-resistant composite steel plate as set forth in claim 3, wherein: the process conditions of the electric arc welding and fusion welding are as follows: the voltage is 30-31V, the current is 350-380A, the wire feeding is 100-200g/min, and the walking speed is 150-200 mm/min.
5. The method of manufacturing a wear-resistant composite steel plate according to claim 1, wherein: the full-automatic special welding machine comprises a machine table, a base plate feeding end, a wear-resistant composite steel plate discharging end, a welding machine and a control cabinet; the two ends of the machine platform are respectively a base plate feeding end and a wear-resistant composite steel plate discharging end, the machine platform is connected with a welding machine and a control cabinet, and the control cabinet is also connected with the welding machine; a pressing plate is also arranged on the machine table, and a plurality of pressing cylinders are also arranged on the pressing plate; the welding machine comprises a flux-cored wire, a wire feeding barrel, a wire feeding motor and a welding machine port, wherein the flux-cored wire is placed on the wire feeding barrel and is connected with the welding machine port through the wire feeding motor, a guide rail is arranged between a base plate feeding end and a wear-resistant composite steel plate discharging end, and the welding machine port is arranged on the guide rail and is arranged above the base plate feeding end.
6. The method of manufacturing a wear-resistant composite steel plate as set forth in claim 5, wherein: the wire feeding barrel is also connected with a motor of the rotary wire feeding barrel.
7. The method of manufacturing a wear-resistant composite steel plate as set forth in claim 5, wherein: and a guide wire sleeve is also arranged at one end of the flux-cored wire connected with the welding machine port.
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