194 results about "Diffusion bonding" patented technology

The invention belongs to the technical field of composite material preparation, and particularly relates to a preparation method of a SiCf / TiMoNb heterogeneous core material reinforced GH4169 composite material. The preparation method comprises the following steps: depositing a TiMoNb alloy matrix on the surface of SiC fiber by using a magnetron sputtering method to form a precursor wire, carrying out composite molding on the obtained precursor wire and a GH4169 sheath in a hot isostatic pressing manner, and carrying out diffusion bonding to form the composite material. The obtained composite material SiCf / TiMoNb / GH4169 has excellent unidirectional performance at high temperature, the tensile strength at 850 DEG C can reach 1057 MPa, and the high-temperature strength of GH4169 alloy is effectively improved. The prepared composite material is high in high-temperature strength and has good application prospects, and the adopted preparation process is mature in technology and little in pollution.

The invention relates to the technical field of vacuum brazing, and discloses a vacuum brazing method for a needle array radiator, which comprises the following steps of: fusing reference process parameters of a historical process knowledge base and multi-dimensional characteristic parameters of the needle array radiator to obtain brazing process characteristic parameters; performing process strategy matching on the needle array radiator to confirm a vacuum brazing strategy of the needle array radiator; a vacuum brazing strategy is applied, and a vacuum brazing furnace is driven to execute stage process operation of preheating degassing, brazing filler metal melting and spreading, diffusion bonding and controllable cooling; performing situation analysis on the real-time process data flow of the stage process operation to obtain deviation data; dynamic parameter reconstruction is conducted on the target brazing stage of the needle array radiator, and temperature regulation and control parameters and process logic parameters are obtained; the needle array radiator is subjected to circulating brazing control, and a post-welding component of the needle array radiator is obtained; the efficiency of the vacuum brazing method for the needle array radiator can be improved.

The invention provides a preparation method of a micro-channel pipe structural member for a liquid cooling plate, and belongs to the technical field of liquid cooling plates. The invention discloses a preparation method of a micro-channel pipe structural member for a liquid cooling plate. The preparation method comprises the following steps: S1, preparing raw materials for forming the liquid cooling plate; s2, carrying out roll bending forming treatment on the upper wallboard raw material; s3, roll bending forming treatment is conducted on the lower wall plate raw material; s4, the micro-channel pipe raw material is subjected to roll bending forming treatment; s5, the upper wall plate structural part, the lower wall plate structural part and the micro-channel pipe structural part which are subjected to roll bending forming treatment are connected and fixed through brazing, and a final three-layer structural part is assembled; and S6, a cooling water nozzle is installed at the position of the micro-channel pipe structural part. According to the method, roll bending is conducted firstly, then welding is conducted, the method has the advantages of being efficient and rapid in forming, integrated forming can be achieved on complex profiles through the process, high-temperature diffusion bonding is avoided, and therefore the service life of the three-layer plate is greatly prolonged, and the mechanical property of formed components is greatly improved.

The invention discloses a Cu and secondary aluminum cast-rolling solid-liquid composite material and a preparation method thereof, and relates to the field of metal recycling, the Cu and secondary aluminum cast-rolling solid-liquid composite material comprises a Cu layer and a secondary aluminum layer, and the Cu layer and the secondary aluminum layer form metallurgical bonding at an interface through a cast-rolling process; a diffusion bonding layer with components changing in a gradient manner exists at the interface, the thickness of the diffusion bonding layer is 5-50 microns, and a continuous or discontinuous intermetallic compound layer is generated in the diffusion bonding layer; according to the Cu and secondary aluminum cast-rolling solid-liquid composite material and the preparation method thereof, through a pre-oxidation-cast-rolling composite technology, a compact Cu2O film is prepared on the surface of Cu in advance, and a controllable reduction-diffusion reaction occurs when the compact Cu2O film makes contact with a secondary aluminum melt; according to the process, an interface barrier is removed, and newly-generated active Cu atoms and Al atoms form a diffusion bonding layer with components changing in a gradient mode under rapid cooling and pressure of a casting roller.

The invention relates to a method for preparing a diffusion bonding layer on a nickel-based alloy and YSZ ceramic coating interface, and belongs to the technical field of metal material surface protection and ceramic coatings. According to the preparation method, a YSZ composite ceramic coating is deposited on the surface of the nickel-based alloy by adopting an electrophoretic deposition method, and then an MCr2O5 (M is Zr, Y, Ce, Yb and Al) diffusion bonding layer is prepared on the interface of the nickel-based alloy and the YSZ composite ceramic coating by adopting a pressureless discharge sintering and thermal diffusion treatment method. The bonding layer prepared through the diffusion method is good in interface bonding, the thermal stress between the nickel-based alloy and the YSZ ceramic coating is effectively buffered, the defects that a bonding layer prepared through a traditional method is large in pore impurity amount and the like can be overcome, and the bonding force between the ceramic coating and a base body and the high-temperature anti-oxidation and anti-stripping performance are remarkably improved.

The invention discloses a method for preparing a thin-wall part with a snakelike hollow channel by adopting superplastic forming / diffusion bonding. The method comprises the following specific steps: step 1, plate preparation and surface cleaning treatment; and step 2, solder resist coating: using a mask plate to deposit on a specific area of the plate and coating the solder resist according to an S-shaped shape, and removing the protective adhesive tape after spraying is completed. And 3, assembling and sealing, wherein the plates are stacked according to the design sequence, the edges are sealed and welded, and an air inlet / outlet is reserved to be connected with an air pipe. And 4, heating is conducted, specifically, the assembly is put into a mold, then the mold is uniformly put into a superplastic forming machine tool, and heating is conducted till the plate superplastic forming temperature is reached. And fifthly, diffusion bonding is conducted, specifically, uniform pressure is applied to the mold through a pressing head in the superplastic machine tool, so that diffusion bonding combination is conducted on the contact face, not coated with the solder resist, of the plate at high temperature and high pressure, and a connecting rib is formed. And 6, superplastic forming / diffusion bonding is conducted, specifically, the temperature is kept, and high-pressure inert gas is introduced into the assembly through a reserved air inlet according to an air pressure loading curve. And the plate coated with the solder resist is subjected to superplastic deformation and is attached to a mold cavity, diffusion connection between the plates is completed in the area not coated with the solder resist, and finally the needed thin-wall part with the serpentine channel cavity is formed. And 7, cooling and demolding are conducted, specifically, the thin-wall part with the snake-shaped hollow channel is taken out after cooling to the room temperature, and the residual solder resist is cleaned.

A modular lead connector for a medical device is described. The modular lead connector comprises an alumina ring having opposed first and second faces provided with respective first and second metallizations. First and second gold washers are contacted to the respective first and second metallizations, and the ceramic ring supporting the first and second gold washers is positioned between first and second titanium contact rings. Then, with the ceramic ring and the titanium contact rings being in axial alignment, they are hermetically connected to each other at respective first and second titanium / gold / alumina diffusion bonds. A lead connector assembly comprising at least two modular lead connectors in axial alignment and welded together is also described. An open sleeve is connected to a proximal-most one of the axially aligned modular lead connectors, and a terminal plate is welded to a distal-most one of the axially aligned modular lead connectors.

This invention discloses a method and apparatus for fabricating complex hollow structures using pulsed DC and induction eddy current cyclic loading assisted diffusion bonding, relating to a method for assisted heating diffusion bonding. It achieves efficient and uniform heating of metallic materials. Step 1: Prepare a predetermined complex hollow metal structure to be diffuse bonded, polish and clean the surface of the complex hollow metal structure; Step 2: Place the complex hollow metal structure in a tooling mold for molding, and place the mold into a vacuum furnace; Step 3: Set up a dual-source control system; Step 4: Perform diffusion bonding under specified parameters, depressurize after the diffusion time is completed, and cool in the furnace until it reaches room temperature before removing the part. This invention combines pulsed DC heating and induction eddy current heating for diffusion bonding, improving diffusion efficiency while ensuring temperature uniformity, increasing the welding rate, and improving the quality of the diffusion joint.

The invention belongs to the field of hot isostatic pressure diffusion bonding, and particularly relates to a hot isostatic pressure diffusion bonding method for nickel-based alloy and niobium-based alloy. The method comprises the following steps of machining, sheath manufacturing, cleaning, assembling, packaging, leakage detecting, vacuumizing, clamping and sealing and hot isostatic pressing. According to the method, ODS copper is added to serve as a middle layer, a hot pressing system is controlled, reliable metallurgical bonding of a connection interface is achieved, no intermediate phase is generated, element transition of the connection interface is uniform, the whole body has high connection strength, the method can be used for manufacturing nickel-based alloy and niobium-based alloy connection parts in a fusion reactor, and the comprehensive use performance of materials can be met.

The invention provides a zirconium alloy surface nanocrystallization and self low-temperature diffusion bonding method, relates to the technical field of nuclear fuel element manufacturing, and solves the technical problems that existing zirconium low-temperature diffusion bonding can only realize connection of a certain small-size sample and a sample with a regular and flat surface and cannot be applied in an engineering manner. The method comprises the following steps that the surface roughness of the to-be-welded surface of the zirconium alloy is machined to be smaller than or equal to 1.6 micrometers; performing surface nanocrystallization treatment on the to-be-connected surface of the processed to-be-welded zirconium alloy test piece by adopting ultrasonic peening; the to-be-welded zirconium alloy test piece subjected to nanocrystallization treatment is accurately assembled and fixed through spot welding; and the assembled zirconium alloy test piece to be welded is subjected to diffusion bonding through a vacuum diffusion bonding technology. The machining difficulty of the to-be-welded test piece is reduced, and batch manufacturing can be achieved in the field of nuclear fuel element manufacturing; the method is suitable for processing complex structural members; and a product with high joint connection strength, uniform interface structure components and good corrosion resistance is obtained.

The invention discloses a method for diffusion bonding of titanium alloy and stainless steel by using an intermediate layer, which is characterized in that a layer of Ta material and a layer of Ag material are sequentially arranged between a titanium alloy workpiece and a stainless steel workpiece as the intermediate layer, and diffusion welding is realized by heating and pressurizing. The method is applied to diffusion welding connection between Ti alloy and stainless steel, and the problems of brittle phase generation, residual stress concentration, insufficient connection strength and the like caused by large thermal expansion coefficient difference and high interface reaction activity of dissimilar materials can be effectively solved. And the connection residual stress can be better reduced, the connection strength is improved, and the joint interface quality and the overall mechanical property are improved.

The present invention discloses a lightweight and high-strength Fe-Al composite plate for a finned tube radiator, its preparation method and application, belonging to the technical field of layered products composed of metals. The preparation method of the present invention includes the following steps: (1) Metal material treatment: Prepare iron sheets and aluminum sheets, and polish the two metal sheets until polished stripes with the same direction appear; Stack the polished iron sheets and aluminum sheets alternately and keep the polished stripes in the same direction to obtain a laminated blank; (2) Room temperature pre-bonding: The laminated blank is rolled to obtain an intermediate material preliminarily bonded at room temperature; (3) High-temperature diffusion bonding: The intermediate material is heat-insulated at a certain temperature, immediately taken out after the treatment and hot-rolled to obtain a lightweight and high-strength Fe-Al composite plate. Through rolling, the surface of the sheet metal is broken and mechanically meshed, and diffusion reaction occurs during heat preservation to generate an intermetallic compound layer, and pores are eliminated to make the interface better bonded, so that the finished product has good tensile properties.

The application provides a hollow part superplastic forming method with thickness steps, comprising the following steps: diffusion bonding multiple plates to form a superplastic forming blank, the superplastic forming blank has a hollow area for filling high-pressure gas and a solid area for realizing diffusion bonding, and the hollow area forms N thickness steps; and designing N superplastic forming molds corresponding to the N thickness steps according to a forming numerical model of the hollow part. The application designs and processes multiple superplastic forming molds on the basis of the forming numerical model of the hollow part, sequentially superplastic forms each thickness step from thick to thin through the multiple superplastic forming molds, makes each thickness step sequentially thin from thick to thin, reduces the thickness gradient difference between each thickness step, makes the thickness distribution of the finally superplastically formed hollow part more uniform, and improves the deformation coordination of different areas, and solves the problem of severe thinning of the thinner area generated by one-time superplastic forming.

Methods of joining dissimilar metal, non-cylindrical golf club components, and particularly golf club bodies and faces, using one or more solid state processes are disclosed herein. One method includes the steps of preparing a first non-cylindrical golf club component made of a first metal material, preparing a second non-cylindrical golf club component made of a second metal material that is different from the first metal material, and affixing the first non-cylindrical golf club component to the second non-cylindrical golf club component along a plane using a solid state joining process. Another method includes the steps of providing a golf club body with a first planar joining surface, providing a golf club face component with a second planar joining surface, and affixing the first planar joining surface to the second planar joining surface via linear friction welding, rotational friction welding, diffusion bonding, or ultrasonic welding.

A facing diffusion welding structure blade journal boring and milling tooling, belonging to the technical field of aero-engine blade machining, includes a base for supporting the upper structure, and a first pressing plate positioning assembly and a second pressing plate positioning assembly installed at both ends of the upper surface of the base. At the upper surface of the base at the front ends of the first pressing plate positioning assembly and the second pressing plate positioning assembly, a second positioning block and a third positioning block for determining the axial direction of the blade are respectively installed, so as to realize the conformal positioning in the axial direction of the blade. By using the journal boring and milling tooling, boring and milling are combined on the same device, which can meet the requirement of no interference during the two machining processes of boring and milling, improve the clamping stability of the blade, and the consistency of the position tolerance of the journal is better; at the same time, the blade does not vibrate during the machining process, avoiding the problem of unstable machining dimensions caused by the vibration of the blade, thereby improving the machining quality of the blade.

The application discloses a kind of profile pre-dispersion superplastic forming / diffusion connection method, belong to superplastic forming field.The present application solves the uneven wall thickness problem caused by excessive deformation of core plate when forming ultra-thin hollow multilayer structure by existing superplastic forming / diffusion connection method.The present application makes the core plate first undergo a large plastic deformation by the method of pre-expansion, releases the stress concentration in the material, then makes the protruding part undergo plastic deformation by positive expansion, because the core plate has undergone plastic deformation in the reverse expansion stage, the stress is more evenly distributed in the positive expansion stage, thereby avoiding the phenomenon of excessive deformation and thinning in local area, especially in high strain parts such as fillet, greatly improving the uniformity of wall thickness.The method provided by the present application includes the following steps:(1) core plate preforming and welding isolation rib;(2) panel forming;(3) core plate and panel combination;(4) core plate reverse expansion;(5) core plate superplastic forming.

The invention discloses a method for welding zirconium alloy through combination of thermal hydrogen treatment and vacuum thermal compression, and belongs to the technical field of materials and welding. The problem that the zirconium alloy is prone to plastic attenuation in the fusion welding and high-temperature diffusion bonding processes is solved. According to the method, the to-be-welded zirconium alloy element is firstly subjected to thermal hydrogen treatment, hydrogen can reduce the phase transition temperature of the zirconium alloy, then the zirconium alloy is subjected to vacuum hot pressing in the diffusion bonding process, large-scale recrystallization and recrystallization occur in the zirconium alloy under the combined action of temperature and pressure, and crystal grains are refined to a certain extent. And meanwhile, the zirconium alloy subjected to thermal hydrogen treatment can release a large amount of hydrogen, and hydrogen embrittlement of the zirconium alloy is avoided. The vacuum hot pressing process also enables the zirconium alloy to generate work hardening so as to further improve the strength of the zirconium alloy. The welding rate of a zirconium alloy element connector obtained through welding reaches 100%, the shear strength of the connector can reach 450 MPa or above, and the shear elongation reaches 29%.

This invention relates to a method for preparing a high-wear-resistant metal-based composite material. This method significantly improves the wear resistance of the material by combining nano-reinforcing particles, surface modification technology, and self-healing capabilities. Aluminum alloy or titanium alloy is selected as the matrix, and nano-sized silicon carbide or alumina particles are used as reinforcing materials. The reinforcing materials are uniformly dispersed using processes such as stir casting, forging, diffusion bonding, infiltration, or powder metallurgy. The composite material structure is then precisely formed using 3D printing technology. The surface of the composite material is treated with a nano-coating or plasma treatment to enhance its wear resistance and corrosion resistance. Furthermore, by embedding microcapsules containing a repair agent into the material, automatic repair of worn areas is achieved, improving the material's reliability and service life. This composite material is particularly suitable for mechanical engineering and automotive manufacturing, especially in the manufacture of automotive brakes under high-wear environments, demonstrating excellent performance and broad application prospects.

To provide a Cu-based powder allowed to prepare a Cu-based material that Fe in the Fe-based material is not to excessively diffuse toward the Cu-based material if the Cu-based and Fe-based materials are both used for diffusion-bonding or infiltration and is excellent in diffuseness to the Fe-based material, and moreover to suppress the hindrance to diffusion-bonding, infiltration or sintering by a SiO2 oxide film because of a reduced solid-solubility limit of Si to a Cu phase and it is less apt to form a SiO2 oxide film over a powder surface.SOLUTION: A Cu-based powder comprises an Fe content of 1.5 mass% or higher and 5.0 mass% or lower, a Mn content of 0.3 mass% or higher and 6.0 mass% or lower, a Si content of 0.25 mass% or lower, an O content of 0.25 mass% or higher and 0.55 mass% or lower, and the remainder of Cu and inevitable impurities.SELECTED DRAWING: None

The disclosed method of diffusion bonding of a lead zirconate titanate piezoelectric crystal to a metal wear plate, for the fabrication of an ultrasonic transducer operable at high temperatures and able to withstand repeated thermal cycling, comprises depositing noble metal coatings on both bonding surfaces, bringing the surfaces into contact, and heating under pressure at a temperature ranging from 270 to 400° C.

The invention discloses a diffusion welding method for an electrostatic chuck base and an insulating layer. The diffusion welding method comprises the following steps that (1) the base and the insulating layer are pretreated; (2) the three-layer composite brazing filler metal is subjected to laser cutting according to the size of a to-be-welded area; the cut three-layer composite brazing filler metal is subjected to ultrasonic cleaning, drying and vacuum sealing storage; (3) the base, the three layers of composite brazing filler metal and the insulating layer are stacked and assembled in sequence; (4) the assembly part is put into a vacuum diffusion welding furnace, vacuumizing is conducted till the pressure is smaller than or equal to 2 * 10 <-3 > Pa, the temperature is increased to 500-600 DEG C in a segmented mode, meanwhile, the axial pressure of 2-20 MPa is applied, and after pressure maintaining, the temperature is slowly reduced to the room temperature; and (5) carrying out nondestructive testing on the welding interface by adopting an X-CT and ultrasonic phased array detection system. The welding temperature can be reduced, so that the residual stress of a welding bonding interface can be reduced, the cracking risk in the using process of the electrostatic chuck is reduced, and the service life of the electrostatic chuck is prolonged; meanwhile, it is ensured that the bonding interface has high thermal conductivity, and the temperature uniformity of the wafer can be improved.

A sputtering target assembly comprises a tungsten containing sputtering target, a titanium containing backing plate attached to the tungsten containing sputtering target and an interlayer positioned between and diffusion bonding the tungsten containing sputtering target and the titanium containing backing plate. The interlayer includes a nickel layer immediately adjacent to the tungsten containing sputtering target and a copper layer immediately adjacent to the nickel layer.

The invention discloses a vacuum diffusion bonding method for low-alloy high-strength structural steel and Al-Mg series aluminum alloy, and aims to solve the problem of low joint strength caused by the fact that a brittle phase of a thick iron-aluminum intermetallic compound can be generated in a welding joint in an existing bonding method for the low-alloy high-strength structural steel and the Al-Mg series aluminum alloy. The diffusion bonding method comprises the following steps: 1, polishing the to-be-welded surfaces of the low-alloy high-strength structural steel and the Al-Mg series aluminum alloy; secondly, Fe, Co, Cr, Ni and Cu metal powder are subjected to ball milling and mixing, and intermediate layer foil is machined after smelting; thirdly, the low-alloy high-strength structural steel and the middle-layer foil form a to-be-welded accessory; 4, performing vacuum diffusion bonding; and fifthly, diffusion welding is conducted on the welded part and the Al-Mg series aluminum alloy. According to the method, the FeCoCrNiCu high-entropy alloy intermediate layer foil is used, an intermetallic compound layer with low brittleness is formed, cracks are prevented from being generated in the joint, and the maximum tensile strength can reach 95 MPa or above.

Vacuum electron devices (VEDs) are produced having a plurality of two-dimensional layers of various materials that are bonded together to form one or more VEDs simultaneously. The two-dimensional material layers are machined to include features needed for device operation so that when assembled and bonded into a three-dimensional structure, three-dimensional features are formed. The two-dimensional layers are bonded together using brazing, diffusion bonding, assisted diffusion bonding, solid state bonding, cold welding, ultrasonic welding, and the like. The manufacturing process enables incorporation of metallic, magnetic, and ceramic materials required for VED fabrication while maintaining required positional accuracy and multiple devices per batch capability. The VEDs so produced include a combination of magnetic and electrostatic lenses for electron beam control.

The invention belongs to the technical field of powder metallurgy, and relates to a stainless steel rotating part surface hard alloy layer and a diffusion bonding method and application thereof. The diffusion bonding method comprises the following steps: firstly, preparing CS3113 alloy powder; machining the stainless steel rotating part to form a surfacing groove; welding wires are melted and filled into the surfacing groove in a layered manner until the surfacing groove is fully stacked; then the stainless steel rotating part subjected to surfacing is machined till the shape of the stainless steel rotating part is the same as that of a target finished product; then designing and welding a sheath and detecting leakage, wherein the stainless steel rotating part is arranged in the sheath; and finally, the hard alloy layer on the surface of the stainless steel rotating part is prepared in the mode of powder filling, degassing and sealing welding, hot isostatic pressing, rough machining and sheath removing, heat treatment and finish machining. The prepared hard layer is uniform in structure and hardness, meanwhile, the prepared hard layer is high in bonding strength with a base material, has the characteristics of wear resistance, corrosion resistance and stable mechanical property, and can be used for preparing rotating parts in various shapes.

The application discloses a diffusion connection method for improving high-temperature strength of steel / copper dissimilar alloy joints, and aims at solving the problem of low high-temperature strength of the existing steel / copper dissimilar alloy diffusion connection joints.The diffusion connection method comprises the following steps: firstly, a plurality of grooves are formed on the welding surface of at least one of a steel alloy workpiece and a copper alloy workpiece, and titanium carbide particles are filled in the grooves; secondly, a friction stir head is used to perform friction stir surface treatment on the workpiece with the grooves filled with the titanium carbide particles; and thirdly, the welding surfaces of the two workpieces are abutted, a connection pressure is applied, and diffusion connection is carried out at a temperature of 500-950 DEG C in a vacuum diffusion furnace.The workpiece surface is subjected to the friction stir surface treatment, the fine-grained structure of the workpiece surface has more diffusion channels and lower atomic diffusion activation energy, and reliable joints can be obtained at a lower temperature; meanwhile, the distribution of the fine micron or nanometer titanium carbide particles in the structure has a thermal stability enhancement effect on the fine-grained structure, and the fine-grained structure has excellent high-temperature resistance.

A method is disclosed herein. The method includes mixing (302) a plurality of metal powders to form a blended powder, pressing (304) the blended powder to form a porous sheet of compacted powder, cutting (306) the porous sheet to form a plurality of cross sections, performing (310) a diffusion bonding process on the plurality of cross sections to bond the plurality of cross sections together forming a near net shape preform, the near net shape preform being denser than the porous sheet, and (312) consolidating the near net shape preform to form a full density near net shape component.

A kind of composite manufacturing method of blade leading edge titanium alloy reinforcing edge hot creep and diffusion connection, titanium alloy reinforcing edge upper and lower thin-walled prefabricated parts are respectively prepared by the way of cutting plate material, titanium alloy reinforcing edge middle layer block prefabricated part is prepared by the way of cutting titanium alloy block material;After being assembled, the upper thin-walled prefabricated part, the core mold, the middle layer block prefabricated part and the lower thin-walled prefabricated part are arranged between the upper and lower molds, and the prefabricated part is bent and attached to the mold by cold pressing, and the titanium alloy reinforcing edge is obtained by composite forming after die closing.The composite method of hot creep and diffusion connection after piece cold pressing is used to process leading edge reinforcing edge once, which can significantly improve the forming efficiency and material utilization rate, shorten the processing cycle, and at the same time, the size precision and forming quality of reinforcing edge can be well controlled.

The invention provides a powder metallurgy product with improved friction performance and a preparation method thereof, and relates to the technical field of powder metallurgy. The powder metallurgy product for improving the friction performance comprises the following raw materials in parts by weight: 20-25 parts of copper powder, 3-7 parts of tin powder, 5-7 parts of aluminum powder, 3-7 parts of cuprous oxide, 12-13 parts of graphite and 13-15 parts of molybdenum disulfide. Diffusion bonding among powder particles is enhanced by applying pulse current in the pressure forming process, the density is improved, the strength distribution of metallurgical products is uniform, and Joule heating and diffusion bonding among the powder particles are promoted by applying pulse current in the sintering process and combining with mechanical pressure. Local high temperature (plasma discharge effect) is generated at a particle contact point, rapid sintering is promoted, the whole process can be completed within several minutes to dozens of minutes, the sintering temperature is reduced, the sintering time is greatly shortened, and the preparation efficiency is improved.

The invention discloses a method for regulating and quantifying a tungsten steel interface structure, which is characterized in that diffusion bonding is performed on tungsten / steel through spark plasma sintering (SPS) equipment, the magnitude and the direction of an SPS auxiliary current are adjusted, and generation of a brittle phase at an interface in the diffusion bonding process is inhibited by utilizing a non-thermal effect of the current. And quantifying the influence degree of current on diffusion in the sintering process and quantitatively separating the influence of the current non-thermal effect (electromigration) and the Joule thermal effect on the diffusion behavior in the SPS process by combining an experimental result and the Fick's law. And the calculated influence of the auxiliary current on the thickness of the diffusion layer reaches 37%. And the current direction is changed, the influence on the diffusion behavior of the V / CLAM steel interface element is obvious, and generation of about 50% of brittle phases is inhibited. All parts in the prepared joint are tightly combined, and the defects of obvious cracks and the like are avoided. A shear test result shows that the joint and the fracture position are changed under the action of current, and the shear strength reaches 260 + / -56MPa after generation of brittle phases is inhibited.