32 results about "Fusion zone" patented technology

The invention relates to a nanoindentation and reliability characterization technology thereof, in particular to a heterogeneous material welding reliability characterization method applied to a brush type sealing structure. By means of the nanoindentation technology, mechanical properties such as hardness, elasticity modulus and plastic deformation of the welded joint are obtained by analyzing indenter deformation and indentation morphology. Meanwhile, indentation testing is carried out on different positions of the brush type sealing welding joint, and the performance comparison condition of all areas of the welding joint is obtained. Compared with a traditional reliability characterization means, the device and the method have the advantages that various areas of the heterogeneous welding joint including a base material, a heat affected zone and a fusion zone are tested under the nanoscale, various material performance indexes such as hardness, elasticity modulus and plastic deformation are measured at the same time, and the device and the method have high-precision and multifunctional testing capacity and are suitable for popularization and application. And moreover, the joint cannot be damaged or other properties cannot be influenced, and compared with a room-temperature stretching result, the nanoindentation technology has relatively high reliability and repeatability, and an accurate characterization result is obtained.

The invention provides a quantitative evaluation method for micro-area comprehensive mechanical properties of an electron beam welding joint, and belongs to the technical field of material mechanical property evaluation.A load-displacement curve is obtained through a nanoindentation test, and a data processing method combining numerical integration and high-order derivative calculation is adopted, so that the comprehensive mechanical properties of the electron beam welding joint are evaluated. Meanwhile, three performance parameters of strength, plasticity and strain hardening are extracted, and a quantitative mapping relation between the three performance parameters and the microcell structure is established. The method solves the problem of mechanical property quantitative evaluation of gradient structures of a fusion zone, a heat affected zone and a base metal zone of a welding joint, and the problems of high cost, low efficiency, single parameter and the like in the existing evaluation technology.

The invention provides a fractal porous orifice plate flowmeter design method and a fractal porous orifice plate flowmeter, and belongs to the technical field of fractal orifice plate designing.The fractal porous orifice plate flowmeter design method comprises the steps that according to fractal strategy parameters and fractal strategies, basic fractal elements are designed; fractal pore plate units are obtained through fractal design according to the fractal strategy parameters and the basic fractal elements; the fractal pore plate unit is integrally shrunk, and the designed fractal porous pore plate flowmeter is obtained. The fractal theory is introduced, the design method of the fractal porous orifice plate flowmeter is established, the limitation of conventional porous layout is broken through, the fractal porous orifice plate flowmeter with strict self-similar characteristics is designed, and the fractal orifice plate has the advantages in the aspects of pressure loss and pressure recovery compared with a traditional orifice plate; the excellent metering characteristic is benefited from local fusion and local joint development of small-scale jet flow, a local fusion area induces a pressure negative peak value, a local joint area enables the pressure negative peak value to recover rapidly, and the recovery speed is also remarkably higher than that of a traditional configuration.

The invention relates to the technical field of welding processes, in particular to a welding process method for optimizing martensitic stainless steel welding three-zone hardness, which comprises the following steps: welding by adopting gas metal arc welding, and controlling heat input to slow down the cooling rate; dual tempering heat treatment is carried out after welding, specifically, the first tempering temperature is 650-700 DEG C, and after first tempering, standing is carried out for a preset time length, and cooling is carried out to the room temperature; tempering for the second time at the temperature of 580-620 DEG C; wherein the base material is ultra-low carbon martensitic stainless steel, and the welding material is a nickel-molybdenum alloy welding wire matched with the base material. According to the method, gas metal arc welding is adopted for welding, and heat input is controlled to slow down the cooling rate; double tempering heat treatment is carried out after welding, the hardness of a weld zone, a fusion zone and a heat affected zone is eventually homogenized, and synergistic improvement of hardness homogenization and corrosion resistance is achieved.

The invention provides a semiconductor pipeline weld joint intelligent detection and compensation method based on space attention, and the method comprises the steps: recognizing an internal fusion region image, an external fusion region image, an internal heat affected region image and an external heat affected region image of a welded special gas pipeline based on a collected 2D image and 3D point cloud of the welded special gas pipeline; respectively inputting the internal fusion region image, the external fusion region image, the internal heat affected region image and the external heat affected region image of the welded special gas pipeline into a pre-trained welding defect identification model to obtain a defect identification result output by the welding defect identification model, the defect identification result is used for indicating a welding defect type and a defect quantification out-of-tolerance degree value existing in the welded special gas pipeline; and on the basis of the defect recognition result, a corresponding process compensation scheme is matched in a process parameter association library, so that welding process parameters of the subsequent welding special gas pipeline of the tungsten electrode track welding equipment are adjusted.

The invention belongs to the technical field of microstructure simulation, and provides a method for simulating a local corrosion process of an Al-Cu-Li alloy laser welding joint aiming at the problem that a traditional CA model has defects in simulation of microscopic grain structure characteristics, the CA model is reconstructed on the basis of a Voronoi diagram method and test characterization data, and the local corrosion process of the Al-Cu-Li alloy laser welding joint is simulated. An intermetallic compound is introduced into a model for the first time, a three-dimensional CA model containing seven types of cells and five evolution rules is systematically constructed, and reproduction of local corrosion processes such as grain boundary preferential dissolution and corrosion channel expansion of a fusion region in an acid environment is achieved. Optimization design is carried out on model parameters based on a deep learning training algorithm, and the optimized model well reflects the actual intergranular corrosion morphology of the fusion zone.

The application provides a method for improving the elongation of a high-strength aluminum alloy medium plate welded joint, which comprises the following steps: butting and assembling two welding workpieces with equal thickness to form a flat plate-shaped workpiece to be welded; determining first optimized process parameters of a laser-arc hybrid welding device and second optimized process parameters of a laser heat conduction welding device, wherein the second optimized process parameters are determined according to the front surface fusion width FW and the back surface fusion width BW of the welded joint formed according to the first optimized process parameters; using the first optimized process parameters to perform laser-arc hybrid welding on the front surface welding area of the flat plate-shaped workpiece to be welded, and simultaneously using the second optimized process parameters to perform laser heat conduction welding on the back surface welding area of the workpiece to be welded. The laser heat conduction welding acts on the back surface welding area, so that the back surface fusion zone and the corner part of the base material surface realize smooth transition, the stress concentration at the weld toe is relieved, and the post-weld elongation of the welded joint is improved under the premise that the strength of the welded joint meets the design standard.

The present application relates to metal piece welding technical field, especially a kind of metal piece automatic welding system;Including rack;Rotary mounting has tray on rack, fixed plate is installed on the upper end of rack by support column, and limit mechanism is equipped on fixed plate, and fixed mechanism is equipped on tray;The present application solves the problem that welding displacement and rotation are not synchronized through the linkage design of fixed mechanism and limit mechanism.Synchronous trigger sliding ring in fixed mechanism when lower pressing plate moves down, and extruding piece clamping support plate is driven through connecting rod, and positioning block expands radially to support and adjust support plate and screw under the action of guide piece;Linkage part in limit mechanism drives limit block extruding nut and forms two-way constraint with upper end face of rotary disc;Reinforcing part synchronously implements radial support to middle part of screw and presses down support plate to limit vertical displacement.Three linkage eliminates the displacement problem of component caused by high-temperature expansion and vibration, ensures that welding position is accurate and fusion zone thickness is uniform.

The invention provides a welding method for reducing welding cracks of a Ti2AlNb alloy. The welding method comprises the following steps: preheating the Ti2AlNb alloy to be welded before welding; the preheated Ti2AlNb alloy is subjected to wire filling welding; and after welding is completed, a welding part is rapidly subjected to postweld heat treatment, and the Ti2AlNb alloy welding part without welding cracks is obtained. According to the Ti2AlNb alloy welding method, the cooling rate after welding can be effectively reduced through preheating treatment before welding, thermal stress accumulation of a welding joint is reduced, an intergranular liquid film is prevented from being torn due to the stress effect after welding, and the overall quality of the Ti2AlNb alloy welding joint is greatly improved; according to the method, ultrahigh-frequency pulse welding and the wire filling technology form a synergistic effect, ultrahigh-frequency pulses can precisely refine the structure of a weld joint fusion area, continuous distribution of intergranular finally-solidified residual eutectic liquid phases at the grain boundary is avoided, the wire filling technology can effectively compensate the shrinkage amount in the welding process, and the welding quality is improved. And therefore, the stress concentration phenomenon of the welding joint is avoided, initiation and extension of welding cracks are inhibited, and the quality stability of the Ti2AlNb alloy welding joint is improved.

The invention discloses an electric heating repairing and strengthening method for a TC4 titanium alloy welded joint, which adopts a high-energy pulse current processing device to carry out short-time and rapid heat treatment on the specified TC4 titanium alloy welded joint by changing electric pulse parameters under the protection of inert gas so as to repair the defects of a welding fusion zone and improve the phenomena of coarse grains and the like in a heat affected zone. The method is simple, rapid, efficient and energy-saving, fixed-point heat treatment can be carried out on the designated area of the component, the mechanical property of the welding area can be improved and recovered, the strength and plasticity of the titanium alloy are improved at the same time, the strength is improved by 21-41 MPa, meanwhile, the plasticity is improved by 29%-55%, and the method has good application prospects.

The present application relates to the technical field of welding repair, and discloses a P91 steel welded joint repair method, which comprises the following steps: S1, chiseling a repair welding groove on the weld of a workpiece; S2, performing repair welding in a multi-layer and multi-pass manner, wherein the welding material is ENiCrFe-3, the inter-pass temperature of the repair welding is 100-150 DEG C, and the welding line energy is 10-20 kJ / cm; and S3, knocking the repair welding part and the periphery of the workpiece after the repair welding, wherein the number of times of knocking is 4800-5200 times / min.The present application has the beneficial effects that: the P91 steel welded joint is repaired by the multi-layer and multi-pass repair welding manner, thereby effectively reducing the thermal stress residue; the post-welding internal stress can be reduced by knocking treatment after the repair welding, the optimization of the weld residual stress of the repair welding area of the welded joint, the microstructure and mechanical properties of the repair weld and the fusion zone are realized, and the reliability and service life in the subsequent service process are improved; and the present application also has the advantages of simple process, easy operation, low cost, high repair efficiency, energy saving and environmental protection, etc.

To provide an electrofusion joint in which the strength of the electrofusion socket is appropriately improved. [Solution] The electrofusion joint 10 comprises a joint body 12 having an electrofusion socket 16 and a heating wire 20 embedded in the electrofusion socket. The heating wire has an effective heating wire portion 50 that is spirally provided near the inner circumferential surface of the electrofusion socket 16 in the fusion zone 40, and a reinforcing portion 52 that is spirally provided at a predetermined radial distance from the inner circumferential surface of the electrofusion socket in the cold zone 42 at the axial rear, so as not to melt the inner circumferential surface of the electrofusion socket during fusion.

A quasi-pulsed FRC deuterium-deuterium fusion reactor and its self-sustaining nuclear fuel cycle steady-state power generation method are disclosed. The reactor comprises a linear vacuum chamber, an FRC plasma formation zone, a collision fusion zone, a conical transition section, a plasma formation coil, a fast compression coil, a magnetic mirror coil assembly, a deuterium-tritium feeding system, a zoned vacuum pumping system, and a pulsed power control system. The magnetic mirror coil assembly is located near the collision fusion zone in the conical transition section. Within a single pulse cycle, it sequentially executes four functional modes: compression assistance, magnetic mirror reflection, magnetic bottle confinement, and recovery attenuation. During the recovery attenuation mode, it is reused as a direct energy conversion induction coil. The operation mode employs a trace amount of tritium to catalyze deuterium-deuterium fusion. Tritium and helium-3 are confined to participate in the secondary reaction through magnetic mirror confinement. Between pulses, the difference in chemical adsorption of tritium and the difference in cryogenic condensation of helium-3 are utilized to achieve selective recovery of the two components, forming a quasi-pulsed self-sustaining operation. The power is then converted into steady-state electrical power and connected to the grid via a rectification-storage-inverter system, realizing the internal recycling of tritium and helium-3.

A temperature sensor may include a baseplate and a housing. The baseplate may include a rim portion with a top surface. The housing may include a strut portion with a bottom lip. The bottom lip may abut to and be one of fused to the top surface by a fusion zone or brazed to the top surface by a braze joint. The temperature sensor may include a fusion zone fusing the bottom lip and the top surface or a braze joint brazing the bottom lip and the top surface. A portion of or an entirety of the top surface of the rim portion may be utilized in the fusion zone or the braze joint. The bottom lip may include a lattice which improves the wetting of the braze joint.

This invention relates to the field of heat treatment technology for metallic materials, and discloses a method for controlling the microstructure and mechanical properties of welded thick titanium alloy plates. The method includes the following steps: providing a titanium alloy welded joint obtained by a narrow-gap welding method; performing stress-relieving annealing on the welded joint to obtain a primary part; and subjecting the primary part to a secondary annealing heat treatment in the two-phase region of the titanium alloy, the secondary annealing heat treatment comprising multiple cycles of heat treatment to eliminate acicular martensite in the fusion zone of the primary part and to equiax the acicular structure, thereby obtaining a finished part. This invention can effectively eliminate acicular martensite within coarse grains in the fusion zone of the welded joint, promoting the transformation of the acicular structure into a uniform and fine equiaxed structure, effectively improving its strength and plasticity, and significantly improving the microstructure morphology and mechanical properties of the fusion zone.

The present application relates to the field of welding technology, especially to a welding method for high-strength stainless steel automobile fuel tank multi-layer plate structure. The present application first adopts resistance seam welding by adding triangular transition wedge for the multi-layer plate structure of the fuel tank shell and end cover, and then carries out circular polarization mode laser remelting welding along the newly formed weld, which can effectively reduce the welding defects of high-strength stainless steel automobile fuel tank multi-layer plate structure. The present application can effectively reduce the resistance welding defects caused by the sudden reduction of material due to the special overhanging structure of the transition area of high-strength stainless steel automobile fuel tank multi-layer plate structure by adding right-angled triangular wedge, and the second resistance welding circular polarization mode laser remelting can release the welding residual stress caused by high-strength steel resistance seam welding, so that the fine grain structure is formed in the weld area, the performance of the fusion zone is improved, the oil tightness of the automobile fuel tank during long-term use is ensured, and the high-frequency vibration requirement of high-strength stainless steel automobile fuel tank multi-layer plate structure during automobile driving is met.

The application discloses a one-piece optical fiber coupler with flat-top light spot output, a preparation method and an output method, and relates to the technical field of laser light spot shaping. The one-piece optical fiber coupler with flat-top light spot output comprises an input optical fiber bundle, a multimode output optical fiber and a ball-burning transition structure. The output end of the input optical fiber bundle is formed into a taper fusion zone through tapering. The output end of the taper fusion zone is processed into at least one ball-burning structure through ball-burning, and the diameter of the spherical structure of the ball-burning structure is greater than the core diameter of the input optical fiber in the taper fusion zone, so that the proportion of high-order modes in laser is increased. The input end of the multimode output optical fiber is fusion-spliced with the ball-burning structure formed at the output end of the taper fusion zone of the input optical fiber bundle. The application can perform light spot shaping on a Gaussian-distributed laser beam to obtain flat-top light spot output, and does not need to increase a complex machining part structure, has a simple manufacturing method, a small size, a compact structure and good stability.

The utility model relates to a combination device capable of avoiding skin cracking and a rocket storage tank, the combination device at least comprises a corner piece, the corner piece comprises a vertical plate, an adapter plate and a connecting plate, the vertical plate is installed at the top end of the adapter plate, the vertical plate is perpendicular to the adapter plate, the connecting plate is installed at the bottom end of the adapter plate, and the vertical plate is used for installing accessory equipment; a plurality of welding through holes are formed in the adapter plate, and the connecting plates located in the welding through holes are welded to the skin body to form a welding fusion area. The welding penetration depth can be reduced, the rigidity of the welding position of the skin body is guaranteed, the welding area can be increased, the connecting strength of the corner pieces and the skin body is improved, and cracking of the skin body is avoided.

A welding method of welding, an end surface of end portions of a first member and a second member being arranged next to one another, by a laser beam with the end surface being disposed to face a laser processing apparatus, includes a first step of irradiating the first member with the laser beam to form a first fusion zone; a second step of irradiating the second member with the laser beam to form a second fusion zone; and a third step of, when the first fusion zone and the second fusion zone are bonded, irradiating the bonded first fusion zone and second fusion zone with the laser beam to form a single fusion zone, and the laser beam includes a first laser beam and a second laser beam having different wavelengths.

This invention relates to the field of laser cladding performance evaluation technology, and particularly to a method and system for evaluating the mechanical properties of laser cladding coatings based on parameter analysis. The invention analyzes the solidification strengthening state of the inter-fusion zone between the cladding coating and the substrate based on laser process parameter data and molten pool monitoring data; it analyzes the degree of thermophysical property matching between the substrate and the cladding coating based on material parameter data and laser process parameter data; it evaluates the mechanical properties of the laser cladding coating based on the results of the analysis of the solidification strengthening state of the inter-fusion zone and the analysis of the degree of thermophysical property matching; and it screens products based on the evaluation results of the mechanical properties of the laser cladding coating. This significantly improves the efficiency and coverage of performance evaluation, ensuring the overall service reliability of the coated products.

To provide a method for manufacturing a tailored blank material, which improves press formability and stabilizes welding quality, and to provide the tailored blank material.SOLUTION: A method for manufacturing a tailored blank material includes a tailored welding step of irradiating a portion where a side surface of a first steel sheet 1 and a side surface of a second steel sheet 2 having a strength larger than that of the first steel sheet are butted against each other with a laser beam to join the first and second steel sheets, and a heat-affected-portion re-irradiation step of irradiating a HAZ softened portion 4A of a heat-affected portion generated in the first steel sheet among heat-affected portions 4 generated on both sides of a first melted portion 3 with a laser beam to form at least a part of the HAZ softened portion into a second melted portion 5. The tailored blank material includes a first steel sheet and a second steel sheet, a side surface of the first steel sheet and a side surface of the second steel sheet are joined by a first fusion zone, and the first steel sheet has a heat affected zone adjacent to the first fusion zone and a second fusion zone adjacent to the heat affected zone on a side opposite to the first fusion zone.SELECTED DRAWING: Figure 3

The application discloses a kind of metal material continuous compounding method and its device, belong to metal material manufacturing field, to solve the stability of large size base material height direction compounding process and the problem of heat on-demand regulation, including the following steps: according to the proportion requirement of the base material and the clad material of compounding determines mold;Height and temperature adjustable parallel temperature control block is set at the joint surface of base material and clad material;Determine the power supply mode, metal supply and feeding mode according to the working condition requirement.The application places parallel temperature control block between base material and clad material, each block is independent and parallel to each other, which solves the problem of difficult matching of required temperature and supplied temperature in each area, and the problem of difficult control of heterogeneous material fusion depth;Realize the depth controllable of the fusion zone of clad metal and base material.

This utility model provides an anti-detachment mechanism for air mattress interfaces, relating to the field of air mattress accessories. It includes: an interface base integrally formed on the air mattress body, the bottom surface of which extends into the air mattress body to form an embedded anchoring structure; a soft connector; and an annular stress-dispersing band covering the connection between the interface base and the air mattress body, its edge being thermally fused with the air mattress body to form a fusion zone of gradually varying thickness. This application utilizes the embedded anchoring structure of the interface base to penetrate deep into the body and disperse stress, preventing the interface base from detaching; the soft connector withstands tensile force to prevent breakage and elastically buffers external forces; and the annular stress-dispersing band disperses stress through elastic deformation and the gradually varying fusion zone. These three elements work together to block the detachment path from the perspectives of connection, tensile strength, and stress dispersion, solving the problem of existing interfaces easily detaching or being damaged by external forces, improving connection reliability while avoiding the waste of medical resources.

The application provides a kind of quantitative evaluation method of micro zone comprehensive mechanical properties of electron beam welding joint, and belongs to the technical field of material mechanical property evaluation.The application obtains load-displacement curve by nanoindentation test, adopts data processing method combining numerical integration and high-order derivative calculation, extracts three types of performance parameters including strength, plasticity and strain hardening, and establishes quantitative mapping relationship between the performance parameters and micro zone structure.The application solves the quantitative evaluation problem of mechanical properties of gradient structure in fusion zone, heat affected zone and base material zone of welding joint, and the problems of high cost, low efficiency and single parameter existing in existing evaluation technology.

The present application belongs to the technical field of intelligent processing of metal materials, and specifically discloses a method for predicting and controlling the strength and toughness of pipeline steel. The method first acquires the physical parameters of the pipeline steel, and establishes a microstructure regulation model including the fusion zone and the heat-affected zone of the weld. Based on the service environment, the boundary conditions of the welding and heat treatment process are set, and after the microstructure simulation, the grain size distribution and the phase content are analyzed. Further, the Hall-Petch formula coupled with the grain size distribution correction coefficient and the grain size related power law hardening model are established to predict the yield strength and toughness. Finally, the process parameters are iteratively adjusted to achieve precise regulation of the strength and toughness. The present application solves the problem that the existing strength and toughness prediction technology does not fully consider the influence of microstructure, and significantly improves the performance reliability of the pipeline steel under service conditions.

The invention relates to the field of welding materials, in particular to a flux-cored wire for dissimilar welding of high-strength weathering resistant steel and ordinary steel and application of the flux-cored wire. The welding powder for the flux-cored wire comprises the following components in percentage by weight: 2.00 + / -0.20% of rare earth silver core-shell powder; 7.05 + / -0.53% of niobium-vanadium composite powder; 29.97 + / -1.91% of nickel-based alloy powder; 0.79 + / -0.11% of molybdenum powder; 1.00 + / -0.12% of titanium boron alloy powder; 10.00 + / -2.82% of a slag former; and the balance of iron powder. A welding seam formed by the flux-cored wire between high-strength weathering steel and ordinary steel has high low-temperature impact energy, the standard impact energy of a fusion zone at the temperature of-40 DEG C is larger than or equal to 115 J, and the flux-cored wire can still absorb high energy without brittle fracture in an extremely low-temperature environment; the corrosion potential difference of a fusion area between the welding seam and the high-strength weathering steel is smaller than or equal to 20 mV, galvanic corrosion is not prone to occurring in the humid corrosion environment containing salt mist and the like, and the overall corrosion resistance of the connector is guaranteed; and the hardness gradient of a fusion region between the alloy and a base material is less than or equal to 150HV / mm, so that the risk of crack initiation and expansion is reduced.

This invention proposes a method for identifying feature points and detecting forming dimensions of cladding passes in arc additive manufacturing based on 3D visual full-morphology point cloud information. The method includes the following steps: using a high-precision 3D scanner to perform omnidirectional scanning of each cladding pass layer, and preprocessing the point cloud data such as filtering, 3D surface reconstruction, point cloud refinement, and feature fitting alignment to obtain effective point cloud data; performing dimensionality reduction on the effective point cloud, and using the DW-GCT method to bidirectionally approximate and search for weld toe feature points of the first cladding pass layer; employing a heterogeneous region adaptive interpolation method to search for edge convex and non-edge convex regions and obtain cladding pass interpolation contours that retain small surface features; and combining this with a layer intersection point dynamic positioning method to bidirectionally search for bite points in the incomplete fusion zone between adjacent layers. The method proposed in this invention can effectively solve the problems of lack of cladding pass side point cloud information, depth of field error, and breakpoint error in existing technologies, and provides a method for extracting the top-layer cladding pass dimension data using the full-morphology 3D point cloud contour information of the cladding pass.

The application provides a kind of semiconductor pipeline weld intelligent detection and compensation method based on spatial attention, wherein, the method includes based on the 2D image and 3D point cloud of the collected welded special gas pipeline, the internal fusion zone image, the external fusion zone image, the internal heat affected zone image and the external heat affected zone image of the welded special gas pipeline are identified;The internal fusion zone image, the external fusion zone image, the internal heat affected zone image and the external heat affected zone image of the welded special gas pipeline are respectively input into the pre-trained welding defect identification model to obtain the defect identification result output by the welding defect identification model, and the defect identification result is used to indicate the welding defect type and defect quantization out-of-tolerance degree value existing in the welded special gas pipeline;Based on the defect identification result, the corresponding process compensation scheme is matched in the process parameter association library to adjust the welding process parameters of the tungsten rail welding equipment for subsequent welding special gas pipeline.

This invention discloses a laser-MIG hybrid welding process for 917 steel based on laser power optimization. The core of this method lies in achieving optimal matching between the microstructure and macroscopic shape of the weld joint by controlling the laser power within a specific range (e.g., around 1400W) when the welding current is fixed (e.g., 120A). Specifically, this method optimizes the molten pool morphology, controls the weld reinforcement and backside sag, refines the grains in the weld zone and fusion zone, forming a dense structure dominated by fine lath martensite, acicular ferrite, and bainite, and reduces carbide precipitation at grain boundaries, thereby improving the overall mechanical properties of the joint. Experimental results show that using the optimized process parameters of this invention (laser power 1400W, current 120A), the weld reinforcement (approximately 1.8mm) and weld width (approximately 3.7mm) exhibit excellent control, with a reinforcement / weld width ratio of approximately 0.49. The joint formation quality is high, making it suitable for precision welding of high-strength steel.