213results about How to "Dense internal organization" patented technology

The invention relates to a method for quickly producing metal mould with laser sintering, which comprises: first, using at least two kinds of different metal powders with different diameters, to be mixed with different mass percentages; using physical or chemical modification to treat the surface of metal powder; then mixing the modified metal powders, the adhesive formed by organic resin and inorganic with different fusion points, and the lubricant uniformly to obtain the metal molding powder; then designing the three-dimension CAD mode of mould, to slice the mode, and laser sintering the metal molding powder; the laser sintered element is baked at 300-800Deg. C; using vacuum pressure penetration to penetrate the metal, to obtain the high-accuracy metal mould.

A technology for forming the Mg-alloy hub of car features three procedures of preshaping, upsetting-squeezing formation and fine trimming and includes such steps as casting a blank; after preshaping,making allowance for apsetting-squeezing formation; upsetting-squeezing formation and deformation degree during isothermal squeezing by using the critical-controlled deformation method; coating graphite lubricant inside the die; and fine trimming. Its advantages are fine crystal grains, and high mechanical performance and surface quality.

The invention provides a method for casting aluminum piston with an insert ring and a cooling coil pipe, comprising steps as follows: (1) preparing aluminum alloy for piston; (2) melting; (3) mould setting of the cooling coil pipe; (4) mould casting of insert ring; (5) mould closing and pouring; (6) mould opening and heat treatment for taking out the casting, processing low temperature melting treatment and ageing heat treatment to obtain the piston blank; (7) post-treatment for carrying out mechanical processing and surface treatment on the piston blank to obtain the aluminum piston finished product. The invention also discloses a method for casting aluminum piston with an insert ring and a cooling coil pipe. Compared with the prior art, the advantages of the invention are as follows: the piston body has compact structure, and the combination between the wear resistant insert ring and the piston body through ultrasonic detection is good, and the position of the cooling coil pipe is precise and the anti-stretching intensity is high.

This invention discloses an abrasion Al arroy cylinder and its manufacture technology, which chemical composition in weights is Si 7.6-8.3% Cu2.5-3.5% 0.3-0.5%Mg, Mn 0.2-0.4%, rest is Al. The technology is that the Al alloy raw material matched in terms of the above mentioned proportion is smelted in a thermal insulation furnace, refined, gas cleaned-up and modificated with dust refinery agent and the solution temperature is monitored by a dogmatic thermometer via a thermal coupler, then an alloy iron cast cylindrical jacket is put on the position of its mold to pour the solution onto the mold cavity to be casted with low pressure casting so as to integrate the jacket with the solution finally it is finished by the process center.

The invention provides a production method of a tantalum target and a tantalum target component. The production method of a tantalum target comprises the following steps of providing a tantalum ingot; forging the tantalum ingot to form a first tantalum target blank; rolling the first tantalum target blank to form a second tantalum target blank; performing first heat treatment on the second tantalum target blank to form the tantalum target, wherein the first heat treatment is divided into three stages: the temperature of the first stage of heat treatment is 550-750 DEG C, and the temperature is maintained for 30-90 minutes; the temperature of the second stage of heat treatment is 750-950 DEG C, and the temperature is maintained for 30-90 minutes; the temperature of the third stage of heat treatment is 950-1,200 DEG C, and the temperature is maintained for 30-90 minutes. By adopting the technical scheme, the main crystal orientation of the obtained tantalum target is (100), and the crystal orientation on the cross section is uniform; moreover, the tantalum target with fine grain and uniform internal organization also can be obtained.

The invention discloses a preparation method of a high-strength corrosion-resistant copper pipe for a heat exchanger. The high-strength corrosion-resistant copper pipe comprises a copper matrix and alloy metals. The alloy metals comprise, by weight, 0.5-0.6% of magnesium, 0.08-0.09% of silver, 0.2-0.4% of tin. 0.012-0.014% of zirconium, 0.012-0.014% of niobium, 0.05-0.06% of nickel, 0.005-0.008% of titanium and 0.02-0.04% of mischmetal. The mischmetal comprises yttrium, berkelium and lanthanum according to a mass ratio of 1: (0.15-0.2): (0.4-0.5). The preparation method utilizes upward continuous casting, rolling and drawing processes to replace casting, sawing, heating, extrusion and pickling processes of the traditional preparation method so that processes are greatly simplified, continuous production is realized, a period is short, and efficiency is high. A copper pipe prepared by the preparation method has oxygen content satisfying the oxygen-free copper level standard, has fine grains, and has mechanical strength, high temperature resistance, corrosion resistance and wear resistance obviously superior to the same performances of the existing copper pipe.

The invention relates to aluminum alloy for an automobile wheel hub and an automobile wheel hub production process. The aluminum alloy comprises: 0.4%-0.8% of Si, 0.8%-1.2% of Mg, 0.15%-0.4% of Cu, 0.7% of Fe, 0.15% of Mn, 0.25% of Zn, 0.15% of Ti and the balance being Al. The production process includes the following steps: S1, blank preparation; S2, blank forging pretreatment; S3, mold pretreatment; S4, forging; forging with a 55MN-65MN forging machine and packing for 20min-30min to obtain a forging blank; and S5, roll forming; before cooling, transferring a wheel hub into an aging treatment apparatus and heat preserving for 6h-8h at the temperature of 170 DEG C-190 DEG C. The aluminum alloy for the automobile wheel hub has the advantages that weight is light, heat dissipation is fast, strength is high, vibration reducing performance is good, service life is long, and waste wheel hubs can be recycled.

The invention relates to a forging technology and a device, in particular to aluminum alloy liquid forging molding technology and a module. In light of the technical problems that the prior art adopts complex module and process not suitable for aluminum alloy liquid forging, etc., the invention provides the forging module with simple structure and easy operation as well as the aluminum alloy liquid forging molding technology with reasonable process. The main technical proposal of the invention is as follows: a lower left module and a lower right module are arranged and fixed on a lower template in parallel, and a cylinder bottom punch gets through the lower template and is arranged between the lower left module and the lower right module; liquid aluminum alloy is injected into a cavity through a pouring port between the lower left module and the lower right module; an upper module is arranged on the lower left module and the lower right module and a pillar is also arranged and fixed; when in forging, the cylinder bottom punch conducts upward squeezing movement on liquid aluminum alloy; after meeting forging requirement, pressure can be maintained for 30 to 50 minutes.

The invention relates to a processing process for compressing and riveting nuts. The invention is characterized by baiting the raw materials, cold-sizing the blanks, heading positively and composite extruding the head, then positively and negatively composite extruding jacquard gears and the lower nozzle position and at last impacting and extruding pressure holes to tap the inner holes. Metal streamlines are continuously distributed according to the shapes, and the interior tissues of the metal streamlines are compact so that the tensile strength at the lower nozzle position of compressing and riveting nut is better. The abrasion of a mould is small and has regular variation, thereby the property of the product is more stable. And the utilizing rate of the materials can reach 92%.

The invention discloses an engine aluminum alloy front cover and its manufacturing engineering, in which the chemical composition consists of (mass%): 7.8-8.2% silicon, 2.6-3.0% copper,0.25-0.35% magnesium,0.28-0.38% manganese and the other is aluminum. The manufacturing engineering includes: first preparing die for the front cover and water circulating channel core for inactivity; smelting the aluminum alloy raw material with a perfect allocation according to the said proportion in die-casting furnace and performing aftertreatment deaeration, metamorphic conditioning and temperature administration; when pouring, accurately placing water circulating channel core into front cover die cavity, then pouring the acceptable aluminum alloy liquor into pouring cup on the said die, performing gravity roll-over casting with metallic gravity casting machine to make the aluminum alloy liquor enter die cavity smoothly and steadily; after casting, obtaining the product by cold-setting, impact cleaning and central handling. The said aluminum alloy front cover is of smooth surface, dense internal organization, good air impermeability and fewer holes, which can effectively improve the engine service behavior.

The invention discloses a split type mould used for a press, a manufacturing method and a forging bucket tooth thereof, which utilizes the split type mould to solve the technical problem of demoulding. The adopted mould is divided into an upper separated body and a lower separated body, the upper separated body consists of a punch head upper cover and a punch head embedded at the lower end of the punch head upper cover; the lower separated body is formed by that an outer sleeve is fixedly connected on a backing plate and internally installed with a tube mold of the separated body, and a disconnecting square sleeve is installed at the upper part inside the tube mold; and an ejector rod is installed in the central hole of the backing plate. The manufacturing method comprises the following steps: the punch head is utilized for hammering the blank so as to carry out foring compression in the tube mold, the punch head moves upwards when the press returns to the original position, the disconnecting square sleeve prevents the forging bucket tooth form moving so as to disconnect the punch head and the forging bucket tooth, the ejector rod ejects the forging bucket tooth and the tube mold of the separated body upwards, the tube mold is divided into two blocks along the outer sleeve, and the forging bucket tooth carries out demoulding automatically. The invention solves the problem of the automatic demoulding of the bucket tooth by foring compression; the mechanical property and the wear-resisting property of the forging bucket tooth are improved by more than 30 percent compared with that of a casting bucket tooth, especially when being used in severe conditions such as mines and the like, the forging bucket tooth has more superior performances.

The invention provides a technological method for upwardly and continuously casting, rolling, drawing and producing copper alloy tubes. The technological method comprises the following steps: melting copper alloy raw materials according to a content proportion; further homogenizing the contents of an undercurrent passing by a standing chamber; keeping the temperature of the undercurrent by a maintaining furnace; cooling the undercurrent by a crystallizer to enter a tractor; upwardly drawing and continuously casting copper alloy tube blanks; then rolling the copper alloy tube blanks by a rolling mill; and drawing finished products of copper alloy tubes by a drawing mill. The technological method simplifies a traditional technological process in a new once-forming technology and has little investment, small occupation of land, low energy consumption, high efficiency, high rolling yield, little pollution and low cost, thereby being an advanced technological method with a certain market competitiveness.

The invention relates to a sand lined metal mould casting brake shoe tool device and a production method thereof, and belongs to the field of sand lined metal mould casting. The sand lined metal mould casting brake shoe tool device comprises a lower casting piece and a gating system, wherein the lower casting piece and the gating system are both arranged on a mould board; the sand lined metal mould casting brake shoe tool device further comprises an upper casting piece, a single casting piece, a connection board, a loam core and a flow gate; the lower casting piece and the upper casting piece are both connected with the connection board to form the single casting piece; the loam core is arranged inside an iron mould and used for forming an inner cavity of the single casting piece, a sprue base and the lower part of a cross gate; the inner flow gate is arranged in an inner pouring gate; and one end of the flow gate is connected with the cross gate, and the other end of the flow gate is connected with the single casting piece. According to the invention, the lower casting piece and the upper casting piece are connected into a circle to form the single casting piece, the inner cavity of the single casting piece is formed by the loam core, and the production method of the sand lined metal mould casting brake shoe tool device has simple operation and high efficiency, so that the yield of the casting piece is increased, the production efficiency is improved, and the produced casting piece of the brake shoe is smooth and clean in surface and accurate in size.

The invention relates to a forming die and method for magnesium alloy thin webbed supporting fork forgings, in particular to an isothermal die forging forming die and method for a rare earth magnesium alloy thin webbed supporting fork. The problems that rare earth magnesium alloy thin webbed supporting fork forgings are prepared through conventional forging, blank manufacturing and forming are hard, forming defects are prone to occurring, the structure performance of the magnesium alloy forgings is hard to control, and the performance is low are solved. The forming method comprises the main steps that 1, blank manufacturing is carried out; 2, forging forming is carried out; 3, cooling is carried out; 4, primary acid pickling is carried out; 5, damage repairing is carried out; 6, final forging is carried out; 7, secondary acid pickling is carried out, wherein a magnesium alloy forging obtained in the sixth step is subjected to acid pickling, graphite on the surface is cleaned away, and a formed forging with the treated surface is obtained; and 8, the formed forging with the treated surface obtained in the seventh step is put into an aging oven to be subjected to aging treatment, and the finished rare earth magnesium alloy thin webbed supporting fork is manufactured. The forming die and method are used for preparing of the magnesium alloy thin webbed supporting fork.

The invention discloses an F304 / F304L double-standard stainless steel flange. The F304 / F304L double-standard stainless steel flange comprises a through hole and a flange plate. The flange plate is of a disc structure, the through hole is formed perpendicular to the flange plate with the center axis of the flange plate serving as the center line, and the edges of the two ends of the through hole are provided with a boss and a groove respectively. The flange plate comprises a front flange plate body, a middle flange plate body and a rear flange plate body which are sequentially arranged in parallel, the diameters of the front flange plate body, the middle flange plate body and the rear flange plate body are equal, the thicknesses of the front flange plate body and the rear flange plate body are equal, at least four fixing holes are evenly formed in each flange plate body, the hole diameters of the front fixing holes, the middle fixing holes and the rear fixing holes are equal, and the positions of the front fixing holes, the middle fixing holes and the rear fixing holes correspond. The invention further discloses a production process of the F304 / F304L double-standard stainless steel flange. The F304 / F304L double-standard stainless steel flange is high in rigidity and strength, resistant to corrosion, ingenious in structural design, high in practicality and long in service life.

The invention relates to a forging forming method for magnesium alloy rings. The method includes the steps of blanking, homogenization treatment of blanks, pretreatment of the blanks and a die before forging, multidirectional free forging performing, die forging and finish forging forming and the like. In order to solve the problems of magnesium alloy ring part forming process complexity, easiness in cracking of forging forming and the like, forged magnesium alloy rings are successfully produced by combining multidirectional free forging performing with die forging and finish forging forming, by means of reasonably selecting technological parameters of forging temperature, press-down rate, deformation and the like, and by mutual linking and matching of processes. Auxiliary processes such as extrusion breakdown and the like are omitted, forming processing of the forged rings can be completed only on one hydraulic press, production efficiency is high, the rings are good in size precision and stability, the produced rings are full in mold filling, free of defects such as cracks, folds and the like, and compact in internal texture.

The invention provides a precision external spline pipe forming method. The method comprises the steps that hot rolling bars are sawn, spheroidizing annealing is conducted, and bars are formed through cylindrical turning; shot blasting is conducted on the bars, the bars are processed through phosphorus saponification, and workblank is formed; reverse extrusion, radial facing, chamfering, phosphorus saponification processing and external spline forward extrusion are conducted on the workblank, and the external spline pipe is obtained. According to the precision external spline pipe forming method, the precision external spline pipe can be produced through the common hot rolling bars, and the problem that external spline batch machining is difficult for multiple enterprises is solved. The precision external spline pipe formed by the method is compact in internal structure and stable in hardness number, and the surface smooth finish of the external splines is high and can be smaller than or equal to Ra1.6; in addition, the machining cost is low, machining efficiency is high, follow-up cutting machining amount is small, the requirement for batch production can be met, labor loss is saved, and the enterprise cost is reduced.

The invention discloses a magnesium alloy casting method which comprises the steps of smelting magnesium alloy and deslagging; preheating a gypsum mould; using a gas mixture containing 1-10% of sulfur hexafluoride and 90-99% of argon to pressing a lower tank for 1-2 minutes with the gas pressure of 1-5Kpa; vacuumizing an upper tank to reach a specified negative pressure value k1, injecting a gas mixture containing 1-10% of the sulfur hexafluoride and 90-99% of the argon into the upper tank to rise to a specified negative pressure value k2; pressing the lower tank with the gas pressure of 10-80KPa to realize pressing casting. The invention discloses a magnesium alloy casting device. According to the technical scheme disclosed by the invention, a produced casting has the average wall thickness of 1.0-1.5mm, the tensile strength of 190MPa and the ductility of 2-3%, and is high in surface quality, compact in internals and good in performance, oxidation, cold shut and slag inclusion defects are avoided, and simple process, convenience in operation and low cost are realized.

The invention relates to a short-process efficient production method of a copper-sliver alloy wire, and belongs to the technical field of metal material preparation. The production method is characterized in that a warm type continuous casting method is used to prepare a copper-sliver alloy wire billet with a columnar crystal structure having the high orientation degree along a length direction and a diameter of 1-30 mm, wherein the billet drawing speed of the warm type continuous casting is 1-600 mm / min; and at a room temperature or 20-50 DEG C below the wire billet re-crystallization temperature, the wire billet is subjected to rolling or rough drawing, and then fine drawing is performed to obtain the wire with a diameter of 10-50 [mu]m. The production method of the present invention has the following advantages that: the warm type continuous casting method is used to prepare the copper-sliver alloy wire billet having the columnar crystal structure having the high axial orientation degree, the cold processing extending deformation capability is excellent, the pull-off is not easily generated during the wire drawing process, the intermediate annealing step even can be eliminated, the process is short, the material utilization rate is high, the energy source is saved, the production efficiency is high, the cost is low, and the wire quality and the wire performance are excellent.

The invention provides a production method of a composite material stirring wing. The method comprises the following steps of: (1) wax pressing process; (2) shell making process; (3) dewaxing process; (4) roasting process; (5) composite material smelting process; (6) clean sand pouring process; (7) sprue removing and cleaning process; and (8) heat treatment process. The production method can be used for producing the stirring wing with high safety and reliability, and the high-quality composite material stirring wing can be produced by the method.

The invention discloses a metallurgical bonding double-metal stainless steel cladding reinforcing steel bar and a preparation process thereof. The metallurgical bonding double-metal stainless steel cladding reinforcing steel bar comprises a carbon steel core part and a stainless steel cladding. The composite forming process comprises the following steps: integrally heating an outer-layer stainless steel pipe to 600 to 1000 DEG C by using an induction heater, pouring into inner-layer carbon steel, performing metal liquid casting and manufacturing an interface metallurgical bonding cladding type double-metal composite blank; hot-rolling the cast double-metal blank to form cladding double-metal round steel and threaded steel. The metallurgical bonding interface of the stainless steel layer and the carbon steel core is formed by casting, and the advantages of high bonding strength, excellent processing property, dense structure, high quality, few procedures, low cost, high efficiency and the like are achieved. The integral stainless steel reinforcing steel bar is replaced by the double-metal reinforcing steel bar, so on the premise of guaranteeing the corrosion-resistant characteristic of the reinforcing steel bar, the stainless steel material is saved, the engineering cost is reduced, the strength of the reinforcing steel bar is effectively improved, waste of resource and energy and environmental pollution are reduced, and a wide application prospect is achieved.

The invention relates to the field of special-shaped hollow current conducting plates for copper electrolysis technique and especially relates to a continuous production technique of special-shaped hollow current conducting plates for electrolysis, and the continuous production technique comprises: upward continuous casting, continuously extrusion forming, precise drawing and determining the dimension and sawing to obtain a finished product. The current continuous extruding mainframe equipment is reformed, and the invention provides a continuous production technique of deformed hollow current conducting plates for electrolysis, which has short procedure, little investment, high efficiency and energy conservation is provided. The special-shaped hollow current conducting plate for electrolysis produced by the technique has the advantages of high yield, dense product tissue, small crystalline grain, excellent metallographic structure and excellent mechanical property and electrical conductivity, and the forming precision required by the copper electrolysis technique is satisfied; and the good drapability and reliable conductive contact of cathode plates and anode plates are guaranteed. The invention can solve such problems in the prior art as large raw material inventory, complex production technique procedures and difficult control of product quality, etc.

The present invention is a manufacturing process of gravity pressure casting aluminum alloy bus hub. The manufacturing process includes the following steps: (1) Clamping the mold (2) Casting: Pour aluminum liquid with a temperature of 720°C±5°C into the mold Casting in the cavity; (3) Blocking and sealing: quickly seal the mold cavity after casting, and the time interval from the completion of casting to sealing the mold cavity is less than 10 seconds; (4) Pressurize and fill the mold One stage: add dry compressed air of 0.2Mpa to the mold cavity after sealing and sealing for 0~10s through the ventilation pipe, so that the aluminum liquid is filled with the mold cavity; Section (7) cooling (8) mold opening to take the workpiece. The invention rapidly solidifies and crystallizes the aluminum liquid under medium pressure, improves the mechanical properties of the casting, can replace the forged bus wheel at low cost, has low production cost, high product safety performance, and the product has high market competitiveness and can be widely used. Thereby improving the economic benefit of the enterprise.

The present invention discloses a re-foundry technique and method of waste copper used for producing copper alloy cast formed parts by utilizing waste copper. The main method in accordance with the present invention comprises selecting waste and old copper scrap such as red copper and brass and right amount of rare-earth alloy elements; heating them to 1100-1200 DEG C at an intermediate frequency electric stove, adding alloy element and rare earth of 0.03%-0.5% after a thoroughly stirring, performing an affinage and deterioration processing, straring casting after achieving the preceptive casting temperature, and finally, warehousing after a cleaning and check-up. Casting parts produced by adopting said technological process exhibit high surface brightness, compact internal organizing, without gas cavities, inclusion and abscess air holes therein, which all data entirety achieve performance levels of casting parts of the same breed variety, in china and overseas.

The invention provides a solid welding wire for high-toughness structural steel, which comprises the following chemical components by weight percent: C: 0.06-0.12, Si: 0.4-0.8, Mn: 1.2-2.4, Ni: 0.05-0.30, Cr: 0.15-0.30, S: not more than 0.015, P: not more than 0.020 and the balance of Fe and other unavoidable impurities. As for the solid welding wire for the high-toughness structural steel provided by the invention, yield strength for deposited metal is more than 500MPa and tensile strength is more than 600MPa; after welding, welding seams have beautiful shaping, little splash and low crack sensitivity, thus meeting the welding requirement for a low-alloy high strength steel plate; and relative to an ER55-D2Ti welding wire or a 60kg of welding wire containing Ni-Mo system, the solid welding wire of the invention lowers production cost and use cost on the premise of guaranteeing intensity and impact toughness, thus being suitable for large-scale popularization and application.

The invention provides high-strength low-alloy steel resistant to sulfuric acid dew point corrosion, which is characterized in that the steel contains the following components (in percentage by weight): 0.01 to 0.10 percent of C, 0.20 to 0.40 percent of Si, 0.35 to 1.0 percent of Mn, 0.01 to 0 .05 percent of S, 0.3 to 0.6 percent of Ni, 0.5 to 1.0 percent of Cr, 0.3 to 0.5 percent of Cu, 0.01 to 0.15 percent of Sb, 0.01 to 0 .10 percent of Re, 0.01 to 0 .10 percent of Mo, 0.01 to 0 .10 percent of Nb, 0.01 to 0 .10 percent of Ti, 0.01 to 0 .10 percent of V, and the balance of Fe and inevitable impurities, wherein the total content of alloying elements is less than or equal to 3. The invention has a plurality of alloying elements added at the same time, so that the effects of high strength and corrosion resistance are achieved through the small-amount multi-component effect of the alloying elements.

The invention relates to a method for casting an end cap of a transmission end of a traction motor on a subway locomotive. According to the method, a sand faced permanent iron molding technology is adopted. Through the sand faced permanent iron molding technology, a cavity which is in the shape of a complete end cap of the transmission end is obtained, and four cores are fed to directly cast a part of the end cap of the transmission end, appearance and inner quality of castings are improved effectively, scrappage of the castings is reduced, weight of the castings is reduced by 16%, production efficiency is improved greatly, and a large amount of time and cost of labor and equipment are saved. By the method, the cost is reduced by 28%. Moreover, the method is simple and practical, obvious in economic benefit, wide in market prospect and suitable for most of enterprises.

The invention provides a wear-resistant steel-bonded hard alloy composite hammer head and a manufacturing method thereof. The manufacturing method comprises the following steps of: step (1). blendingtitanium powder, graphite powder, additional hard particles and additives, adding a water-based binder, mixing uniformly, and making the mixture into alloy powder paste or stamping the mixture to forma preform; step (2). pasting the alloy powder paste or fixing the dried preform to the lost foam model of the hammer face of the hammer head, then coating anti-sticking sand fireproof paint, drying,burying in a box, and performing dry sand vibration modeling; and step (3). pouring high-toughness austenitic manganese steel or low-carbon alloy steel melt, using high-temperature molten steel to induce the combustion reaction between titanium and carbon in the alloy powder paste or preform, wherein TiC particles are generated in situ, and the high-temperature molten steel penetrates into an alloy particle layer, and interacts with additional TiC, WC, Al2O3 and other alloy powder particles; and performing cooling and cleaning, then performing heat treatment, and thus, the high-toughness and high-hardness wear-resistant steel-bonded hard alloy composite hammer head is manufactured.

The invention discloses a laser additive manufacturing method for a multihole micro-channel structure. The laser additive manufacturing method for the mulithole micro-channel structure comprises the following steps that a three-dimensional model is established and subjected to layered slicing, and a laser scanning path is acquired; a base material is fixed, and stainless steel / titanium alloy powder is put into a powder cylinder; argon is fed into a forming chamber, and the base material is paved with the powder; laser additive manufacturing equipment is started to conduct scanning machining; aforming cylinder is lowered by a distance of the thickness of a layer, a powder laying device lays a layer of powder on the current machined layer until the structure machining is completed; and a part is subjected to annealing treatment, and the multihole micro-channel structure is obtained. After being formed, the multihole micro-channel structure manufactured through the laser additive manufacturing method is compact, fine and uniform in texture, the metallurgical quality is good, leakage does not occur in the pressing process, the complex inner channel structure is high in size precision,the cross section shape and the distribution limitation of an inner channel are reduced, and the product performance is high; and after the complex multihole inner channel structure is formed, the welding working procedure is not needed, the material utilization rate is increased, working procedures are reduced, and the part manufacturing period is shortened.