CN106001569B - A kind of curved shell Rotating fields metal increases material preparation method - Google Patents

A kind of curved shell Rotating fields metal increases material preparation method Download PDF

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CN106001569B
CN106001569B CN201610529795.4A CN201610529795A CN106001569B CN 106001569 B CN106001569 B CN 106001569B CN 201610529795 A CN201610529795 A CN 201610529795A CN 106001569 B CN106001569 B CN 106001569B
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laser
reinforcement
curved shell
powder
rotating fields
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CN106001569A (en
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顾德阳
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Sichuan Tian Yuan Additive Manufacturing Materials Co Ltd
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Sichuan Tian Yuan Additive Manufacturing Materials Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/60—Treatment of workpieces or articles after build-up
    • B22F10/64—Treatment of workpieces or articles after build-up by thermal means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/36—Process control of energy beam parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/36—Process control of energy beam parameters
    • B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/40—Structures for supporting workpieces or articles during manufacture and removed afterwards
    • B22F10/47—Structures for supporting workpieces or articles during manufacture and removed afterwards characterised by structural features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/34—Process control of powder characteristics, e.g. density, oxidation or flowability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/60—Treatment of workpieces or articles after build-up
    • B22F10/66—Treatment of workpieces or articles after build-up by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/41—Radiation means characterised by the type, e.g. laser or electron beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/248—Thermal after-treatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The present invention relates to a kind of curved shell Rotating fields metal to increase material preparation method, including：1) according to the surface parameter equation of curved shell Rotating fields, carry out curved surface set feature and analyze to obtain laser beam scan path, determine subregion motion scan mode；2) according to the type of curved shell Rotating fields, it is determined that the preset interim reinforcement on curved shell layer；3) selective laser fusing or laser melting coating are carried out, obtains curved shell drip molding；4) curved shell drip molding is heat-treated or smart machine adds processing.The preparation method has：Method process is relatively easy, operating efficiency effectively improves, and the deflection of drip molding disclosure satisfy that use, design needs, and corrosion resistance and anti-fatigue performance greatly improve, and service life can extend, the features such as reducing manufacturing cost.

Description

A kind of curved shell Rotating fields metal increases material preparation method
Technical field
The present invention relates to metal increases material manufacturing technology field, more particularly to a kind of curved shell Rotating fields metal to increase material and prepare Method.
Background technology
At present, in the processing of curved surface plate material parts, hydroforming new technology is introduced, i.e., is situated between using liquid as power transmission Matter makes blank be reclined under fluid pressure effect cavity plate or punch-pin to replace rigid punch-pin or cavity plate to transmit load, so as to Realize the shaping of sheet metal part.But it is only capable of for this kind of material of sheet material, generally solution layer containing curved shell there is no The better method of the processing problems of constitutional detail, mach method can only be used.
3D printing technique is currently as a study hotspot technology, and it is in terms of stamped metal part processing using very wide It is general.However, in stamped metal part laser direct writing, the various situations for needing profile surface shell layer segment can be run into.Mesh Before, because the light-weighted requirement of plant equipment, and the continuous improvement that machining is horizontal, many producers are set from change Count, introduce the drip molding of the various Rotating fields containing curved shell.
Curved shell structure type divides barrel shell, dome thin shell, double curved shell and hyperbolic paraboloid shell, hypar shell etc..Either which kind of shape Formula, for the part of the Rotating fields containing curved shell, the most important problem for needing to solve in its forming process is exactly irreversible Problem on deformation, and temperature is higher, deformation is bigger.Thus propose that one kind can overcome drawbacks described above and drip molding is met There is important important research meaning using the preparation method of the, requirement such as design, intensity.
The content of the invention
Above-mentioned deficiency, the purpose of the present invention present in technology are shaped for curved shell layer in the prior art to exist In：A kind of curved shell Rotating fields metal is provided and increases material preparation method, the preparation method has：Method process is relatively easy, makees Industry efficiency effectively improves, and the deflection of drip molding disclosure satisfy that use, design needs, and corrosion resistance and anti-fatigue performance carry significantly Height, service life can extend, the features such as reducing manufacturing cost.
In order to achieve the above object, the present invention adopts the following technical scheme that realization：
A kind of curved shell Rotating fields metal increases material preparation method, and the preparation method comprises the following steps：
1) according to the surface parameter equation of curved shell Rotating fields, curved surface set feature analysis is carried out, obtains selective laser Scanning pattern when fusing or laser melting coating, it is subregion motion scan mode to determine motion scan mode, in successively increasing material manufacturing In forming process, the technological parameter of laser is controlled to being scanned in lth layer boundary contour and each subregion, each subregion Square, rectangle or circle are shaped as, scan mode is great-jump-forward or continous way, and the scan mode of wherein great-jump-forward is applicable It is scanned in discontinuously choosing subregion farther out in this layer of whole region；The scan mode of continous way is applied to whole at this layer In turn it is scanned in individual region；
2) it is thin in curved surface when carrying out selective laser fusing or laser melting coating according to the type of curved shell Rotating fields Preset interim reinforcement on shell, passes through preset interim reinforcement so that when successively being shaped, this curved shell layer and All layers have enough intensity before this, and after the processing of this drip molding is completed, are easily removed, the parameter bag of the reinforcement The species of reinforcement is included, the species includes cylinder, cuboid or each layer chiasma type；Also the parameter of reinforcement also includes strengthening The density of muscle, the size of reinforcement, the size of reinforcement and shell layer overlapped points, wherein, the density of reinforcement is by drip molding Shell Rotating fields feature determines, is 5-10 times of thickness；The size of reinforcement is the 1/2-1/5 of thin shell thickness；Reinforcement with The size of shell layer overlapped points is the 1/3-1/5 of thin shell thickness；
3) when carrying out selective laser fusing or laser melting coating, following processing step should be used：
A. the scanning of part contour line is formed first；First：Melted for selective laser, the parameter of laser is：Power 200-500W, printing speed are 0.05-0.1m/min, spot diameter 3-8mm, overlapping rate 10%-20%；Print procedure In, the air pressure of inert protective gas is 0.1-0.5MPa；Second：For laser melting coating, the parameter of laser is：Power 2000- 10000W, printing speed are 50-200mm/min, spot diameter 10-15mm, overlapping rate 10%-20%；In print procedure, The air pressure of inert protective gas is 0.1-0.5MPa；
B. the parameter of laser is controlled to move subarea-scanning to the region in specific trellis line again so that drip molding The powder particles fuse of other entity parts,
C. finally the parameter of control laser is scanned to preset reinforcement so that the powder particle of preset reinforcement melts Change, first：Melted for selective laser, printing speed is 0.10-0.30m/min, and other parameters are same as above；Second：For laser melting coating, Printing speed is 100-500mm/min, and other parameters are same as above；
4) after completing above-mentioned steps, curved shell drip molding is obtained；Preset reinforcement is removed to curved shell drip molding, so Carry out the heat treatment of drip molding afterwards and/or smart machine adds processing, wherein, move back including stress relief annealing process or completely during heat treatment Fire processing or normalized treatment, wherein, treatment temperature when carrying out stress relief annealing process is 500-650 DEG C, processing time 2- 3h；Using full annealing processing or normalized treatment；Heat treatment also includes using local heat treatmet, and it causes the crucial portion of drip molding Position obtains required mechanical performance.
As the further optimization of above-mentioned technical proposal, the powder in the step 1) is metal dust and/or alloyed powder End, wherein metal dust include one kind in Fe, Ni, Co, Zn, Al, Cr, Ti；Powder is carried out abundant by proportioning using mixed powder machine Uniformly mixing, and mixed powder is placed in 100-200 DEG C of drying baker and dry 1-1.5 hours and handles；It will dry Composite powder after dry-cure be placed in the powder drum of 3D printer powder feeder give over to it is standby；3D printer automatic powder feeding system is using same Axle powder feeding or not coaxial lateral automatic powder feeding system；Selective laser fusing in the step 2) or during laser melting coating, using nitrogen Gas or argon gas are as protective gas.
As the further optimization of above-mentioned technical proposal, laser in the step 1) using carbon dioxide laser or Person's optical fiber laser.
Compared with shell layer material molding technology in the prior art, using a kind of curved shell Rotating fields metal of the present invention Increase material preparation method to have the advantages that：
(1) subregion motion scan mode is used, reduces the laser heating time of regional, it is possible to reduce thermal deformation.
(2) using the method for preset reinforcement, can be avoided in time just in forming process in increasing material manufacturing forming process In shell Rotating fields deform, or even crack.
(3) for the machining accuracy of drip molding can be improved by the drip molding local heat treatmet after processing, meet to set Count requirement；Service life is extended, and corrosion resistance and anti-fatigue performance greatly improve.
(4) process simple and fast, operating efficiency is high, greatly reduces maintenance cost, preparation method is environment friendly and pollution-free, is green The manufacture method of color, there is the characteristics of applicability is extensive.
Brief description of the drawings
Accompanying drawing 1 increases the schematic flow sheet of material preparation method for a kind of curved shell Rotating fields metal of the present invention.
Embodiment
A kind of curved shell Rotating fields metal of 1 couple of present invention increases material preparation method specific steps and made with detailed below in conjunction with the accompanying drawings Describe in detail bright.
A kind of curved shell Rotating fields metal increases material preparation method, it is characterised in that the preparation method comprises the following steps：
1) according to the surface parameter equation of curved shell Rotating fields, curved surface set feature analysis is carried out, obtains selective laser Scanning pattern when fusing or laser melting coating, it is subregion motion scan mode to determine motion scan mode, in successively increasing material manufacturing In forming process, the technological parameter of laser is controlled to being scanned in lth layer boundary contour and each subregion, each subregion Square, rectangle or circle are shaped as, scan mode is great-jump-forward or continous way, and the scan mode of wherein great-jump-forward is applicable It is scanned in discontinuously choosing subregion farther out in this layer of whole region；The scan mode of continous way is applied to whole at this layer In turn it is scanned in individual region；
2) it is thin in curved surface when carrying out selective laser fusing or laser melting coating according to the type of curved shell Rotating fields Preset interim reinforcement on shell, passes through preset interim reinforcement so that when successively being shaped, this curved shell layer and All layers have enough intensity before this, and after the processing of this drip molding is completed, are easily removed, the parameter bag of the reinforcement The species of reinforcement is included, the species includes cylinder, cuboid or each layer chiasma type；Also the parameter of reinforcement also includes strengthening The density of muscle, the size of reinforcement, the size of reinforcement and shell layer overlapped points, wherein, the density of reinforcement is by drip molding Shell Rotating fields feature determines, is 5-10 times of thickness；The size of reinforcement is the 1/2-1/5 of thin shell thickness；Reinforcement with The size of shell layer overlapped points is the 1/3-1/5 of thin shell thickness；
3) when carrying out selective laser fusing or laser melting coating, following processing step should be used：
A. the scanning of part contour line is formed first；First：Melted for selective laser, the parameter of laser is：Power 200-500W, printing speed are 0.05-0.1m/min, spot diameter 3-8mm, overlapping rate 10%-20%；Print procedure In, the air pressure of inert protective gas is 0.1-0.5MPa；Second：For laser melting coating, the parameter of laser is：Power 2000- 10000W, printing speed are 50-200mm/min, spot diameter 10-15mm, overlapping rate 10%-20%；In print procedure, The air pressure of inert protective gas is 0.1-0.5MPa；
B. the parameter of laser is controlled to move subarea-scanning to the region in specific trellis line again so that drip molding The powder particles fuse of other entity parts,
C. finally the parameter of control laser is scanned to preset reinforcement so that the powder particle of preset reinforcement melts Change, first：Melted for selective laser, printing speed is 0.10-0.30m/min, and other parameters are same as above；Second：For laser melting coating, Printing speed is 100-500mm/min, and other parameters are same as above；
4) after completing above-mentioned steps, curved shell drip molding is obtained；Preset reinforcement is removed to curved shell drip molding, so Carry out the heat treatment of drip molding afterwards and/or smart machine adds processing, wherein, move back including stress relief annealing process or completely during heat treatment Fire processing or normalized treatment, wherein, treatment temperature when carrying out stress relief annealing process is 500-650 DEG C, processing time 2- 3h；Using full annealing processing or normalized treatment；Heat treatment also includes using local heat treatmet, and it causes the crucial portion of drip molding Position obtains required mechanical performance.
Powder in the step 1) is metal dust and/or alloy powder, wherein metal dust include Fe, Ni, Co, One kind in Zn, Al, Cr, Ti；Powder carries out full and uniform mixing by proportioning using mixed powder machine, and mixed powder is placed Carried out in 100-200 DEG C of drying baker dry 1-1.5 hours handle；Composite powder after drying and processing is placed on 3D printing Given in the powder drum of machine powder feeder standby；3D printer automatic powder feeding system coaxial lateral automatic powder feeding system using coaxial powder-feeding or not； Selective laser fusing in the step 2) or during laser melting coating, using nitrogen or argon gas as protective gas.The step It is rapid 1) in laser use carbon dioxide laser or optical fiber laser.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using this hair It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein General Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to implementation here Example, for those skilled in the art according to the announcement of the present invention, not departing from improvement that scope made and modification all should be Within protection scope of the present invention.

Claims (3)

1. a kind of curved shell Rotating fields metal increases material preparation method, it is characterised in that the preparation method comprises the following steps：
1）According to the surface parameter equation of curved shell Rotating fields, curved surface set feature analysis is carried out, obtains selective laser fusing Or scanning pattern during laser melting coating, it is subregion motion scan mode to determine motion scan mode, is shaped in successively increasing material manufacturing During, the technological parameter of laser is controlled to being scanned in lth layer boundary contour and each subregion, the shape of each subregion To be square or circular, scan mode is great-jump-forward or continous way, and the wherein scan mode of great-jump-forward is applied to whole at this layer The subregion discontinuously chosen in individual region farther out is scanned；The scan mode of continous way be applied in this layer of whole region according to It is scanned secondaryly；
2）According to the type of curved shell Rotating fields, when carrying out selective laser fusing or laser melting coating, in curved shell layer Upper preset interim reinforcement, passes through preset interim reinforcement so that when successively being shaped, this curved shell layer and before this All layers have enough intensity, and after the processing of this drip molding is completed, are easily removed, and the parameter of the reinforcement includes adding The species of strengthening tendons, the species include cylinder, cuboid；The parameter of the reinforcement also density including reinforcement, the chi of reinforcement The size of very little, reinforcement and shell layer overlapped points, wherein, the width of reinforcement is determined by the shell Rotating fields feature of drip molding, For 5-10 times of thin shell thickness；The thickness of reinforcement is the 1/2-1/5 of thin shell thickness；Reinforcement and shell layer overlapped points Thickness is the 1/3-1/5 of thin shell thickness；
3）When carrying out selective laser fusing or laser melting coating, following processing step should be used：
A. the scanning of part contour line is formed first；First：Melted for selective laser, the parameter of laser is：Power 200- 500W, printing speed are 0.05-0.1m/min, spot diameter 3-8mm, overlapping rate 10%-20%；In print procedure, inertia The air pressure of protective gas is 0.1-0.5MPa；Second：For laser melting coating, the parameter of laser is：Power 2000-10000W, beats Print speed is 50-200mm/min, spot diameter 10-15mm, overlapping rate 10%-20%；In print procedure, inertia protection gas The air pressure of body is 0.1-0.5MPa；
B. control the parameter of laser to move subarea-scanning to the region in specific trellis line again so that drip molding its The powder particles fuse of its entity part,
C. finally the parameter of control laser is scanned to preset reinforcement so that the powder particles fuse of preset reinforcement, First：Melted for selective laser, printing speed is 0.10-0.30m/min；Second：For laser melting coating, printing speed is 100- 500mm/min；
4）After completing above-mentioned steps, curved shell drip molding is obtained；Preset reinforcement, Ran Houjin are removed to curved shell drip molding The heat treatment of row drip molding and/or smart machine add processing, wherein, include at stress relief annealing process or full annealing during heat treatment Reason or normalized treatment, wherein, treatment temperature when carrying out stress relief annealing process is 500-650 DEG C, processing time 2-3h；Heat Processing also includes using local heat treatmet, and it causes the key position of drip molding to obtain required mechanical performance.
2. a kind of curved shell Rotating fields metal according to claim 1 increases material preparation method, it is characterised in that：The step Rapid 1）In powder be metal dust, wherein metal dust include Fe, Ni, Co, Zn, Al, Cr, Ti in one kind；Powder is by matching somebody with somebody Than carrying out full and uniform mixing using mixed powder machine, and mixed powder is placed in 100-200 DEG C of drying baker and dried Dry 1-1.5 hours are handled；After drying and processingIt is mixedClose powder be placed in the powder drum of 3D printer powder feeder give over to it is standby；3D Printer automatic powder feeding system coaxial lateral automatic powder feeding system using coaxial powder-feeding or not；The step 2）In selective laser fusing or During person's laser melting coating, using nitrogen or argon gas as protective gas.
3. a kind of curved shell Rotating fields metal according to claim 1 increases material preparation method, it is characterised in that：The step Rapid 1）In laser use carbon dioxide laser or optical fiber laser.
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