1289results about "Electron beam welding apparatus" patented technology

The present invention relates to the field of welding technology, specifically to an electron beam welding device and a control method thereof, comprising the steps of: obtaining an initial state of the welding device; obtaining a three-dimensional geometric model of a superconducting cavity, and generating an optimal welding path scheme based on the three-dimensional geometric model and the initial state of the welding device; obtaining parameter data for the welding device to control the movement of the superconducting cavity according to the optimal welding path scheme, and mapping it to the same time axis for synchronous processing to obtain a synchronous control signal, fusing the synchronous control signal with the optimal welding path scheme to obtain a control instruction for the welding device; controlling a welding workbench to weld the superconducting cavity, and during the welding process, controlling the welding device to move the superconducting cavity according to the control instruction until the welding is completed. The present application can significantly improve the accuracy, continuity and stability of electron beam welding by comprehensively controlling position calibration, path optimization and motion synchronization during the welding process.

The invention relates to the technical field of aero-engines, in particular to a weak-rigidity welding casing blade bending deformation control method which mainly comprises the following steps: firstly, setting the steps of performing electron beam welding on a blade, an inner casing and an outer casing: positioned welding, penetration welding and modification welding; then setting the electron beam welding sequence of strip welding seams between the blade and the inner casing as well as between the blade and the outer casing as the third welding seam, the fourth welding seam, the first welding seam and the second welding seam; and finally, the electron beam welding step in the first step is executed on the four welding seams according to the electron beam welding sequence determined in the second step. According to the mechanism of generation of welding buckling deformation, the welding buckling deformation of the blade is compensated by setting the steps of weak-rigidity cartridge receiver blade electron beam welding and setting the welding sequence, the straightness of the cartridge receiver blade is controlled, meanwhile, the influence on stress concentration parts such as a blade body anti-icing groove hole is reduced, the probability of fatigue cracks is reduced, and the service life of the cartridge receiver blade is prolonged. Therefore, the service life of the engine case is prolonged.

The invention discloses a method for preparing a congruent-axis structure refractory medium-entropy alloy by regulating and controlling a liquid bridge transition mode in a double-wire additive manufacturing process and an application of the congruent-axis structure refractory medium-entropy alloy. The invention belongs to the technical field of additive manufacturing. The invention aims to solve the technical problems that liquid bridge transition in the whole process cannot be realized and columnar crystals are extremely easy to form in the process of preparing the refractory medium / high-entropy alloy by adopting an electron beam double-wire additive manufacturing process at present. The method comprises the following steps: firstly, carrying out three-dimensional modeling on a target component, and carrying out slicing treatment; then liquid bridge transition is controlled by regulating and controlling a double-wire feeding strategy; and finally carrying out 3D printing. A double-wire deposition strategy and a control method thereof are adopted, the relative position of the wire and the electron beam, the relative position between the double wires and the relative position of the melting position of the double wires and the melting pool are adjusted, heat input is controlled, stable liquid bridge transition of the double wires under the condition of the constant speed or the non-constant speed is guaranteed, and the welding quality is improved. And thus, the stability of the deposition process and the congruent-equiaxed crystal structure and excellent mechanical property of a deposited part are improved.

The invention relates to a vacuum electron beam welding method for an extra-thick double-sided stainless steel composite blank. The vacuum electron beam welding method comprises the steps that S1, a blank is prepared; s2, processing the surface of the base material carbon steel; s3, processing the surface of the composite stainless steel; s4, assembling and vacuum electron beam direct welding are carried out twice; s5, performing surface anti-oxidation spraying and packaging treatment on the double-sided composite blank after secondary welding; s6, heating the composite blank in a heating furnace, and rolling; and S7, the composite blank is rolled to the thickness required by the product according to the rolling ratio required by the finished product, and the stainless steel + carbon steel + stainless steel extra-thick double-sided stainless steel composite plate can be obtained after cooling. According to the method, the key technical bottleneck of producing the extra-thick double-sided stainless steel composite blank through the vacuum electron beam welding process is solved, particularly, the influence of vacuum electron beam welding magnetic blowing is eliminated, and powerful technical support can be provided for follow-up variety development and stable production.

A tailor-welding, spinning and variable-wall-thickness forming method for a large-sized extension section of a liquid propellant rocket engine, which belongs to the technical field of metal forming. The method comprises: performing laser numerical control machining on a GH3044 superalloy to obtain two chord-tangent circles; performing electron beam welding to obtain a complete circle; performing a vacuum solid solution treatment; performing pre-forming to obtain a shallow dish shape; performing a vacuum solid solution treatment; assembling a variable-wall-thickness flat blank and a spinning mandrel of a first spinning die, and then performing spinning on a spinning machine to form a curved generatrix variable-wall-thickness blank part; performing a vacuum solid solution treatment; and assembling the curved generatrix variable-wall-thickness blank part and a spinning mandrel of a second spinning die, and then performing spinning on the spinning machine to form a curved generatrix variable-wall-thickness part. The present invention is mainly used for the manufacturing of an ultra-large-sized GH3044 extension section of the liquid propellant rocket engine, which has a diameter of 1200 mm and a length of 1500 mm, and the product precision reaches a wall thickness tolerance of + / -0.05 mm for each point and a surface profile of ≤3 mm.

The invention relates to the field of cyclotrons, and discloses a cavity electron beam welding device and method for a high-frequency cavity of a proton cyclotron, and the device comprises a base which comprises a switching part and two fan-shaped parts; the limiting mechanism comprises first components, a second component and a third component, and the third component, the second component and the two first components jointly define a first limiting space; the first supporting component is detachably arranged on at least one fan-shaped part, and a second limiting space is formed between the first supporting component and the second component; the second supporting part is detachably arranged on one fan-shaped part, and a third limiting space is formed between the second supporting part and the second part; a third support member selectively disposed on an upper side of the second support member; and the lateral limiting piece is arranged on the other side, close to the switching part, of the fan-shaped part, and the lateral limiting piece is detachably connected with the fan-shaped part. The number of welding tools and the welding frequency can be reduced, and the welding efficiency is improved.

The invention discloses a metal crack repairing method and device based on an ultrasonic technology. The method comprises the steps that metal powder is selected as brazing filler metal and pretreated; cleaning cracks in the metal base material and spraying a boron nitride coating; mixing an ethanol solution with brazing filler metal powder according to a preset proportion, stirring to form a uniform suspension, injecting the suspension into the crack filling area through a needle tube in a vacuum negative pressure environment, preheating to accelerate solvent volatilization, and only leaving and compacting the brazing filler metal powder; clamping and fixing the base material and putting the base material into a vacuum chamber; electron beam melting is started, snakelike scanning is conducted in the length direction of the crack, and meanwhile ultrasonic vibration is conducted on the crack; and after fusion is completed, ultrasonic vibration is continuously carried out to restrain grain coarsening. Aiming at crack repair of a high-temperature metal part, through the coupling effect of electron beam melting and ultrasonic vibration, the limitation of a single technology is broken through, and a complete and synergistic repair system is formed.

The invention provides a scanning electron beam-brazing composite welding method suitable for a closed cavity structure. The scanning electron beam-brazing composite welding method comprises the steps that S1, test welding is conducted; determining electron beam critical penetration welding parameters; determining scanning parameters of scanning electron beam critical penetration welding; determining scanning electron beam-brazing composite welding parameters; s2, welding seam machining and cleaning treatment; s3, brazing filler metal is selected and filled; s4, tool fixing and spot welding are carried out; s5, scanning electron beam-brazing composite welding is carried out; and the part fixed by the tool is placed in a vacuum chamber of an electron beam welding machine, then the part is welded through the electron beam welding and scanning parameters determined in the step S1 of test welding, and scanning electron beam-brazing composite welding of the part is achieved. The defect that in the electron beam welding process of the closed cavity structure, electron beams easily flow through large burns of metal opposite to a weld joint or are too small to cause non-welding is overcome, and therefore high-quality welding of the closed cavity structure is achieved.

The invention discloses stainless steel vacuum barrel welding equipment and a welding method, and relates to the technical field of welding equipment.The stainless steel vacuum barrel welding equipment comprises a main body, a sealing door is slidably connected to one end of the main body, a limiting mechanism is arranged in the main body, two sets of electric push rods are arranged in the limiting mechanism, and fixing plates are fixed to the two sides of the top end of the limiting mechanism; two sets of metal plates are arranged at one end of the sealing door, the metal plates and the sealing door are elastically connected through a plurality of sets of springs, and a first U-shaped block is fixed to one end of each metal plate. A linear motor is started through a control panel to drive a limiting mechanism to move outwards, a linkage clamping mechanism and a rotary telescopic mechanism are synchronously expanded outwards, electron beam welding is started after an external vacuum pump establishes a vacuum environment, the equipment adopts inner and outer double-side force application to ensure uniform clamping, a shape memory alloy compensates a high-temperature sealing gap, and a spring realizes automatic reset; and sealing failure caused by deformation and thermal deformation of the thin-wall cylinder is effectively prevented.

The invention discloses a high-strength copper-steel double-metal composite material and a preparation method of the high-strength copper-steel double-metal composite material. Copper and steel base materials for preparing the high-strength copper and steel double-metal composite material are selected; the copper base material and the steel base material are welded through the electron beam additive manufacturing technology; scanning a welding seam of the copper-steel bimetallic composite material by using an ultrasonic detection system; analyzing and processing the scanned image through a computer; carrying out secondary treatment on the copper-steel double-metal composite material by adopting a rolling compounding method; carrying out quenching treatment on the copper-steel double-metal composite material; inspecting the performance of the high-strength copper-steel bimetallic composite material; and storing the prepared data to a cloud end through a computer. According to the method, the electron beam additive manufacturing technology and the rolling composite method are combined, the strength of the copper-steel composite material can be improved in the preparation process, the composite material is detected through an ultrasonic detection system, the percent of pass of the composite material can be screened, and the performance of the composite material can be further enhanced through annealing treatment.

The invention relates to the technical field of electron beam welding seam structure performance regulation and control, in particular to an electron beam welding seam structure performance regulation and control method which comprises the steps that a workpiece to be welded is preheated; the preheated workpiece to be welded is welded through electron beams, and a welded workpiece is obtained; and the welded workpiece is subjected to postweld heat treatment, and the electron beam welding seam structure performance regulation and control work is completed. According to the method, welding and post-welding furnace heat treatment can be achieved under the high-temperature preheating condition under the crack control and structure property regulation and control process of high-temperature preheating electron beam welding and furnace heat treatment, welding cracks are avoided through high-temperature preheating electron beam welding, meanwhile, post-welding reheating cracks are avoided through furnace heat treatment, and the welding quality is improved. Weld joint residual stress is eliminated, and weld joint structure performance regulation and control are achieved.

The invention relates to a vacuum electron beam welding method for platinum-iridium alloy, which comprises the following steps: S1, pre-treating a platinum-iridium alloy plate to be welded, S2, fixing the pre-treated platinum-iridium alloy plate, and enabling a to-be-welded area to be tightly connected and to be positioned in an electron beam welding working area; s3, electron beam butt joint parameters and welding parameters are set, vacuumizing is conducted, the platinum-iridium alloy plate to be welded is preheated, and welding is conducted; and S4, after welding is completed, a weldment is cooled. According to the welding method, the technical defects existing in platinum-iridium alloy welding are overcome, the machinable range is wide, after welding, a platinum-iridium alloy plate and a welding area are not oxidized, impurity elements are not introduced, the volatilization loss of platinum-iridium precious metal is extremely small, and the uniformity of molten metal components and structures of a weld joint is guaranteed. And after welding, the connection strength is reliable, welding defects such as cracks and air holes do not exist, the mechanical property is close to that of a platinum-iridium alloy welding joint, the welding quality is excellent, and a new optional thought is provided for the platinum-iridium alloy machining technology.

An additive manufacturing method, applied to the following aluminum alloy composition, in percentages by weight: - at least one alloying element chosen from: Zr, Hf, Sc and Er, in a mass fraction of 0.40 to 1.60% each and / or in total; - Fe, in a mass fraction of 0.40 to 2.35%; - Cr, in a mass fraction of 1.00 to 3.20%.

A process for producing a material layer (12) from a first metallic material (14) and a second metallic material (16) is described. The first metallic material (14) and the second metallic material (16) are provided in a process zone, each in a solid state. An energy beam is then directed at a section of the first metallic material (14) to be liquefied. The energy beam is also directed at a section of the second metallic material (16) to be liquefied. Furthermore, the sections to be liquefied are introduced into a common melt bath (44) and mixed. Alternatively, the sections to be liquefied are heated by the energy beam until liquefaction and then mixed.Furthermore, a device for producing a material layer (12) from the first metallic material (14) and from the second metallic material (16) is presented, which is set up to carry out such a process.

The invention provides a multi-process combined processing method for a large-size titanium alloy frame type structural member, which comprises the following steps: segmenting the large-size titanium alloy frame type structural member to obtain a plurality of process models and welding joint models on the process models; titanium alloy blank forging is conducted according to the process models and the welding joint models, semi-finish machining is conducted after blank forging is completed till the sizes of the process models are achieved, and the multiple process models are obtained; vacuum electron beam welding is conducted on the multiple process models, heat treatment is conducted after welding is completed, and after heat treatment is completed, surface allowance is removed through machining, and a part is obtained; and the quality of welding seams of the parts is detected through X-ray detection and ultrasonic flaw detection, and manufacturing of the large-size high-strength titanium alloy frame type structural parts is achieved.

The invention discloses a preparation method of a clad steel plate, the clad steel plate prepared by the preparation method and application of the clad steel plate. The composite steel plate comprises a base plate layer and a covering layer, a single face of the covering layer is composited on the base plate layer, the base plate layer is made of weathering resistant steel, and the covering layer is made of stainless steel. The preparation method comprises the first step of pretreatment, the second step of assembly, the third step of seal welding, the fourth step of hot rolling, the fifth step of cooling and coiling treatment and the sixth step of heat treatment, vacuum electron beam welding is adopted in the third step, and differential multi-pass rough rolling and multi-pass finish rolling are adopted in the fourth step. The interface bonding rate of the composite steel plate provided by the invention reaches 100%, and the strength, the elongation, the impact property and the bending property are uniform and stable and are all higher than the standard requirements of steel for the truck body.

A processing apparatus includes: an irradiation optical system configured to irradiate an object with first processing light emitted from a first light source, and second processing light that is emitted from a second light source different from the first light source and whose peak wavelength is different from that of the first processing light; and a material supply member configured to supply a build material to a melt pool formed by the first and second processing lights, the peak wavelength of the second processing light is shorter than the peak wavelength of the first processing light, and a second area irradiated with the second processing light is larger than a first area irradiated with the first processing light.

The invention provides a method for electron beam fuse additive manufacturing of a Ti80 titanium alloy component, and belongs to the field of additive manufacturing. The problems of high cost, long period, low efficiency, low utilization rate, serious oxidation and poor toughness of Ti80 alloy preparation in the prior art are solved. The method comprises the following steps that 1, a printing wire and an additive substrate are pretreated; 2, a three-dimensional solid model is established based on the target Ti80 alloy component, and slicing processing importing is carried out; setting a scanning path, preheating parameters and printing process parameters; and 3, equipment is started, vacuumizing is conducted to 9.9 * 10 <-3 > Pa, Ti80 alloy printing is conducted according to the set printing parameters and procedures, all layers are completed, and the sedimentary state Ti80 alloy which is good in forming, compact in structure and excellent in performance is prepared. The method is mainly used for electron beam fuse additive manufacturing.

The present invention relates, inter alia, to a laser welding device (10) which is provided for welding workpieces (90, 91) under negative pressure, preferably in a vacuum, comprising a laser device (11) which is configured to generate and couple a processing laser beam (13) into a welding zone (17) of the laser welding device (10), comprising a first process chamber (30) which is provided in the beam direction (13a) of the processing laser beam (13), in particular in front of the welding zone (17), comprising a first process chamber closure (31) facing the laser device (11), a second process chamber closure (32) facing the welding zone (17), in which in particular an exit opening (32a) for the processing laser beam (13) into the welding zone (17) is formed, and a lateral third process chamber closure (33) extending between the first (31) and second (32) process chamber closures,wherein the laser device (11) is movable relative to the welding zone (17) in a defined welding direction (18). To enable laser welding under negative pressure, in particular in a vacuum, even for large workpieces, the laser welding device (10) is characterized in that at least one first gap-covering device (50) is provided, which is configured to cover a gap (92) between the workpieces (90, 91) to be welded and / or a gap (36) in the first process chamber (30), that the first gap-covering device (50) is provided above the welding zone (17), that the first gap-covering device (50) has a first gap-covering element (51) whose orientation with respect to the welding direction (18) is at least partially variable,that the first gap covering device (50) cooperates with the laser device (11) or the first process chamber (30) and that the first gap covering device (50) is provided in front of the laser device (11) or in front of the first process chamber (30) in the welding direction (18).

The invention provides an electron beam welding method for a ZL114A cast aluminum alloy oil tank product. The method comprises a pre-welding preparation step and a welding step. Wherein the welding part comprises the steps of spot fixed position welding and sealing welding of formal welding. According to the electron beam welding method provided by the invention, the defects of air holes, inclusions and the like in electron beam welding of ZL114A cast aluminum alloy fuel tank products are overcome.

In accordance with at least one aspect of this disclosure, a system can include, a housing assembly and an element assembly having a dual-material component therein, the element assembly joined within the housing assembly via a weld joint at a weld interface between the dual material component and the housing assembly.

A defect detection method for detecting a welding defect that occurs in an additively manufactured object when the additively manufactured object is built by depositing beads formed by melting and solidifying a filler metal, the method includes: detecting a height distribution of a surface shape of the additively manufactured object during the building; representing information on the detected height distribution as a variable of a brightness value of each pixel of a two-dimensional image, and generating a height information image obtained by converting the information on the height distribution into information on a distribution of the brightness value; detecting a shape feature portion having a specific shape feature according to a level of the brightness value of the height information image; and determining a possibility that the detected shape feature portion becomes the welding defect.

The invention discloses a vacuum electron beam welding quality monitoring method and system based on molten pool monitoring, and relates to the technical field of vacuum electron beam welding quality monitoring.The method comprises the steps that a molten pool panoramic image, gas flow, electron beam parameters and molten pool dynamic parameters are collected in real time and stored in an electron beam welding time sequence database; monitoring the pollution degree of a camera window to obtain a window pollution rate wic, setting a window pollution threshold Twi, and when wic is less than Twi, directly calculating the stability of a first molten pool; when wic is greater than or equal to Twi, dynamically changing the gas flow, cleaning a camera window, then running a molten pool stability correction strategy, and further compensating the molten pool stability according to the window pollution rate and the vacuum degree to obtain corrected molten pool stability; surface abnormity is monitored through a molten pool image, a workpiece joint surface abnormity coefficient is obtained, and an electron beam welding quality score is obtained by combining molten pool stability. According to the method, the influence of molten pool stability calculation errors caused by the window cleaning process is solved.

The invention provides a welding wire and maraging steel welding method. The method comprises the steps that a to-be-welded material is subjected to solution treatment and cold treatment, and solution treatment, cold treatment and aging treatment; designing a welding groove of a material to be welded, wherein the welding groove comprises a V-shaped lock bottom butt joint groove and an I-shaped lock bottom butt joint groove; before welding, oxide layers in a welding groove and a nearby 30mm area are removed in a mechanical removal or polishing mode; the to-be-connected workpiece is assembled, wherein the local assembling clearance is not larger than x; setting welding process parameters according to the to-be-obtained front and back welding width conditions of a welding joint, setting a welding speed, a welding current and a fuse speed by gas shielded welding or setting an acceleration voltage, a welding beam current, a filament current and a rotating speed by electron beam welding; and according to the set welding process parameters, maraging steel wire filling welding is carried out under the inert gas shielding condition of gas shielded welding, or maraging steel electron beam welding is carried out under the vacuum condition.

The invention relates to the field of intelligent welding processes and control, and discloses a welding method for a superhard material sealing body multilayer structure. Comprising the steps of obtaining multilayer structure data, and generating a three-dimensional digital model; energy input parameters are optimized according to the heat affected zone and the stress concentration zone, and an initial energy tuning parameter set is generated; according to the initial energy tuning parameter set, temperature field data and stress field data in the welding process are collected, and the dynamic heat affected zone change trend is obtained; according to the change trend of the dynamic heat affected zone, adjusting energy input and a scanning path, and generating a corrected energy tuning parameter; controlling depth distribution of energy in the multilayer structure according to the corrected energy tuning parameters to obtain fusion depth and heat affected zone distribution; energy input and scanning speed are adjusted according to the fusion depth and the heat affected zone distribution, and an energy input parameter set is generated. The precision of energy control in the welding process is improved.

Disclosed is a battery module improved in efficiency of resistance welding and bonding reliability. The battery module includes a plurality of secondary batteries, each having electrode terminals; a module housing having an inner space configured to accommodate the plurality of secondary batteries; and a bus bar including a body portion having a metal plate configured to electrically connect the plurality of secondary batteries to each other and a connection portion extending from the body portion to contact the electrode terminal. Each of the first connection portion, the second connection portion, and the third connection portion has at least one welding point.

The invention discloses a dynamic regulation and control device and method for aluminum alloy electron beam welding residual stress, and belongs to the technical field of electron beam machining, and the device integrates a multi-sensing information acquisition system, a vibration system and a control system. The sensing information acquisition system measures the surface residual stress of a welding seam and a heat affected zone in real time and in situ in the welding process through a vacuum compatible X-ray probe and a detector, compares the predicted stress with a target value, and generates a regulation and control instruction of electron beam welding parameters through the control system; the electron beam welding behavior is adjusted in real time to dynamically control stress, and the vibration system is used for applying high-frequency micro-amplitude vibration to a local high-stress area of a weldment to promote residual stress release. The device integrates monitoring, regulation and stress release functions in a vacuum environment, can remarkably reduce welding residual stress and improve welding seam quality, and is particularly suitable for electron beam welding of large thin-wall aluminum alloy structural parts.

The invention relates to a manufacturing method of a duplex stainless steel and carbon steel asymmetrically rolled composite plate. Stainless steel is any one of duplex stainless steel. The medium carbon steel is any one of plain carbon steel, low-carbon steel and alloy steel. The manufacturing method of the asymmetric composite blank of the duplex stainless steel and the carbon steel comprises the following steps: 1, preparing raw materials for assembling the blank; 2, pretreating the stainless steel middle plate; and 3, surface treatment of the assembly raw material. And 4, cleaning. And 5, assembling. And 6, vacuum chamber electron beam seal welding. And 7, composite blank welding seam detection. And 8, heating the composite blank. And 9, rolling the composite plate. And 10, laminar cooling. And 11, the composite blank has no cracking phenomenon in the heating and rolling processes, the interface shear strength tau after hot rolling is larger than or equal to 280 MPa, the interface bonding rate is 100%, the bonding performance is good, and the proportion of dual-phase steel ferrite is 40-60%.

The utility model discloses an electron track control device and a vacuum electron beam seal welding device, the electron track control device comprises N pairs of metal plates which are opposite pairwise, the middle point of the relative distance of each pair of metal plates is coaxial with the center line of an electron beam, and each pair of metal plates is provided with a uniform electric field; when an upper-layer welding seam is welded, applying a uniform electric field to counteract an upward deflection force generated by an electron beam under the influence of the magnetic field; when a lower-layer welding seam is welded, a downward deflection force generated by an electron beam under the influence of a magnetic field is counteracted by applying a reverse uniform electric field; according to the vacuum electron beam seal welding device, the welding precision of electron beams can be effectively improved, the seal welding quality of a titanium steel composite blank is guaranteed, and a continuous, uniform and large-fusion-depth seal welding joint is formed; and the problems of electron beam drifting, welding seam deflection, welding missing, low fusion depth and the like easily occurring in the current vacuum electron beam welding technology for the magnetic titanium steel composite blank are effectively solved.

The invention belongs to the related technical field of additive manufacturing, and discloses an electron beam melting wire liquid nitrogen copious cooling additive manufacturing method and system.The method comprises the steps that in the electron beam melting printing forming process, liquid nitrogen is sprayed to a molten printing wire under electron beam irradiation, and the liquid nitrogen is sprayed to the molten printing wire; the molten printing wires are subjected to nitridation reaction under the action of electron beams while being subjected to liquid nitrogen cryogenic cooling, so that the crystal structure of a formed part is regulated and controlled, and the mechanical performance is enhanced; and / or liquid nitrogen is sprayed to the printing wire material which begins to be solidified, so that the printing wire material is subjected to liquid nitrogen deep cooling, and the crystal structure of the formed part is regulated and controlled to achieve mechanical property enhancement. Liquid nitrogen is introduced into the electron beam additive manufacturing device for deep cooling, the extruded printing wire is solidified at an extremely high cooling speed after being melted, a large number of homogeneous nucleation sites are formed in a melting area due to the high supercooling degree, the solidification speed is high, a microstructure is customized into uniform and fine equiaxed crystals, the strength and toughness of the material are improved, and the production cost is reduced. The mechanical property is improved.