CN108588498A - A kind of method that Ni-based functionally gradient material (FGM) and precinct laser fusion method prepare Ni-based functionally gradient material (FGM) - Google Patents
A kind of method that Ni-based functionally gradient material (FGM) and precinct laser fusion method prepare Ni-based functionally gradient material (FGM) Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
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- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
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Abstract
The invention belongs to a kind of methods that metal material processing field more particularly to Ni-based functionally gradient material (FGM) and precinct laser fusion method prepare Ni-based functionally gradient material (FGM).The grain size of Ni-based every layer of functionally gradient material (FGM) provided by the invention changes in gradient, and by abccba sequence cycle arrangements, wherein a layers, b layers and c layers of mean grain size is respectively 0.3 μm, 0.6 μm and 1.3 μm.Precinct laser fusion method prepares the method for Ni-based functionally gradient material (FGM) when technological parameter is arranged, change the mechanical property for being circularly set powdering thickness and effectively improving nickel-base material in gradient by xyzzyx sequences, so that different is presented in material surface and interior mechanics performance, the internal stress that material generates under the cool condition of pole can be released effectively, reduce the generation of material internal crackle and micropore, Ni-based functionally gradient material (FGM) will not be cracked after carrying is compared with big load, on the basis of ensureing material density and microhardness, the plasticity and toughness of Ni-based functionally gradient material (FGM) are improved.
Description
Technical field
The invention belongs to metal material processing field more particularly to a kind of Ni-based functionally gradient material (FGM) and precinct laser fusion legal systems
The method of standby Ni-based functionally gradient material (FGM).
Background technology
Nickel base superalloy at high temperature have very high fatigue resistance, tensile strength, yield strength, inoxidizability and
Corrosion resistance is a kind of critical material indispensable in aero-engine hot-end component, in necks such as industrial steam turbine, nuclear industry
Domain is also widely used, and is widely used in aerospace structure member and chemical field.The alloy is for manufacturing engine crankcase, directing vane
The components such as piece, cylinder, fuel manifold, are examined by practical application, and maximum operation (service) temperature is 950 DEG C.
Enterprise mostly uses greatly conventional cast at present, forging, machining process prepare that intensity is high, hardness is big, high temperature resistant
Nickel-bass alloy material, precinct laser fusion method is the important supplement of nickel base superalloy forming mode.Precinct laser fusion method
(SLM), be a kind of rapid shaping technique of metal powder, can straight forming go out the metal parts close to complete consistency.Its
Operation principle is：The threedimensional model needed for three-dimensional drawing Software on Drawing is used first, and threedimensional model is then subjected to slicing treatment,
Obtained data are imported in SLM forming machines, the technological parameter of each drip molding is set in the machine, it is each to automatically generate
The scan data in section, SLM formers control the successively fusing powder of laser selectivity, make to arrive between powder according to data
Up to firm metallurgical binding, accumulation successively is final to obtain required 3 d part.
But utilize the single technique of SLM technology traditions to prepare material grains and be distributed irregularly, and grain size is close unified, material
Expect that surface layer is identical with interior mechanics performance, after laser is removed from processing district, material rapid cooling to the cold generates many micro- in inside
Hole and micro-crack, single technological parameter, which prepares material, can not be released effectively internal stress, after carrying certain load, be easy micro-
Hole and cracks cracking, reduce the performance of material.
Invention content
To solve above-mentioned the deficiencies in the prior art, the present invention provides a kind of Ni-based functionally gradient material (FGM) and precinct laser fusion methods
The method for preparing Ni-based functionally gradient material (FGM).
Technical scheme of the present invention：
The grain size of a kind of Ni-based functionally gradient material (FGM), Ni-based every layer of the functionally gradient material (FGM) changes in gradient, by abccba sequences
The mean grain size of cycle arrangement, wherein a layer is 0.3 μm, and b layer of mean grain size is 0.6 μm, and c layers of mean grain size is
1.3μm。
Further, the Ni-based functionally gradient material (FGM) is by 718 nickel of 625 Ni-base Superalloy Powders of Inconel or Inconel
Based high-temperature alloy powder is made.
Further, the grain size of 625 Ni-base Superalloy Powders of the Inconel is 3.5~40 μm, and chemical composition is
Cr 20.0~23.0%, Mo 8.0~10.0%, Nb 3.15~4.15%, P≤0.015%, C≤0.10%, Si≤
0.5%, Al≤0.4%, Ti≤0.4%, S≤0.015%, Fe≤5.0%, Co≤1.0%, Mn≤0.5%, surplus Ni.
Further, the grain size of 718 Ni-base Superalloy Powders of the Inconel is 3.5~40 μm, and chemical composition is
Ni 50~55%, Cr 17.0~21.0%, Mo 2.8~3.3%, Nb 4.75~5.5%, Al 0.2~0.8%, Ti
0.65~1.15%, C≤0.08%, Si≤0.35%, S≤0.015%, Cu≤0.30%, Mn≤0.35%, B≤
0.006%, surplus Fe.
The method that precinct laser fusion method prepares Ni-based functionally gradient material (FGM), steps are as follows for the method：
Step 1：The threedimensional model for establishing Ni-based functionally gradient material (FGM) to be prepared carries out slicing delamination to threedimensional model, obtains
The data in each section simultaneously import data to quickly shaping device；
Step 2：The technological parameter of each drip molding is set on quickly shaping device, is circularly set by xyzzyx sequences
Powdering thickness, wherein x layer powdering thickness are 0.04mm, and y layers of powdering thickness are 0.05mm, and z layers of powdering thickness are 0.06mm；
Step 3：It is successively laid with Ni-base Superalloy Powder according to powdering mode described in step 2, in certain scanning room
Away from, powder, and Quick-forming successively melted using the scan mode control laser for tilting subregion under sweep speed, laser power
Ni-based functionally gradient material (FGM) is made.
Further, Ni-base Superalloy Powder described in step 3 be 625 Ni-base Superalloy Powders of Inconel or
718 Ni-base Superalloy Powders of Inconel.
Further, the grain size of 625 Ni-base Superalloy Powders of the Inconel is 3.5~40 μm, and chemical composition is
Cr 20.0~23.0%, Mo 8.0~10.0%, Nb 3.15~4.15%, P≤0.015%, C≤0.10%, Si≤
0.5%, Al≤0.4%, Ti≤0.4%, S≤0.015%, Fe≤5.0%, Co≤1.0%, Mn≤0.5%, surplus Ni.
Further, the grain size of 718 Ni-base Superalloy Powders of the Inconel is 3.5~40 μm, and chemical composition is
Ni 50~55%, Cr 17.0~21.0%, Mo 2.8~3.3%, Nb 4.75~5.5%, Al 0.2~0.8%, Ti
0.65~1.15%, C≤0.08%, Si≤0.35%, S≤0.015%, Cu≤0.30%, Mn≤0.35%, B≤
0.006%, surplus Fe.
Further, sweep span described in step 3 is 0.07~0.09mm, and the sweep speed is 650~1050mm/
S, the laser power are 225~345W.
Further, the angle that subregion is tilted described in step 3 is 67 °.
Beneficial effects of the present invention：
1, the grain size of Ni-based every layer of functionally gradient material (FGM) provided by the invention changes in gradient so that material surface and internal power
It learns performance and different is presented, the internal stress that material generates under the cool condition of pole can be released effectively, reduce material internal crackle
With the generation of micropore so that Ni-based functionally gradient material (FGM) can will not crack after carrying is compared with big load, improve Ni-based functionally gradient material (FGM)
Plasticity and toughness.
2, the method that precinct laser fusion method provided by the invention prepares Ni-based functionally gradient material (FGM) is recycled according to variation in gradient
The powdering thickness of setting effectively improves the mechanical property of nickel-base material, on the basis for ensureing material density and microhardness
On, the plasticity and toughness of Ni-based functionally gradient material (FGM) are improved, significantly increase Ni-based functionally gradient material (FGM) uses field.
Description of the drawings
Fig. 1 is the metallographic structure collection of illustrative plates for the Ni-based functionally gradient material (FGM) that embodiment 5 provides；
Fig. 2 is the fracture apperance scanning electron microscope (SEM) photograph for the Ni-based functionally gradient material (FGM) that embodiment 5 provides；
Fig. 3 is the metallographic structure collection of illustrative plates for the nickel-base material that comparative example 1 provides；
Fig. 4 is the fracture apperance scanning electron microscope (SEM) photograph for the nickel-base material that comparative example 1 provides；
Fig. 5 is the scanning electron microscope (SEM) photograph of 625 Ni-base Superalloy Powders of Inconel；
Fig. 6 is the particle size distribution figure of 625 Ni-base Superalloy Powders of Inconel；
Fig. 7 is that the ess-strain for the nickel-base material that the Ni-based functionally gradient material (FGM) that embodiment 5 provides and comparative example 1-3 are provided is bent
Line.
Specific implementation mode
With reference to embodiment, the following further describes the technical solution of the present invention, and however, it is not limited to this, every right
Technical solution of the present invention is modified or replaced equivalently, and without departing from the spirit of the technical scheme of the invention and range, should all be contained
It covers in protection scope of the present invention.
Embodiment 1
The grain size of a kind of Ni-based functionally gradient material (FGM), Ni-based every layer of the functionally gradient material (FGM) changes in gradient, by abccba sequences
The mean grain size of cycle arrangement, wherein a layer is 0.3 μm, and b layer of mean grain size is 0.6 μm, and c layers of mean grain size is
1.3μm。
Embodiment 2
A kind of Ni-based functionally gradient material (FGM) is made of 625 Ni-base Superalloy Powders of Inconel, and the Ni-based functionally gradient material (FGM) is every
The grain size of layer changes in gradient, presses abccba sequence cycle arrangements, wherein a layer of mean grain size is 0.3 μm, and b layers are put down
Equal grain size is 0.6 μm, and c layers of mean grain size is 1.3 μm.
Wherein the grain size of 625 Ni-base Superalloy Powders of Inconel be 3.5~40 μm, chemical composition be Cr 20.0~
23.0%, Mo 8.0~10.0%, Nb 3.15~4.15%, P≤0.015%, C≤0.10%, Si≤0.5%, Al≤
0.4%, Ti≤0.4%, S≤0.015%, Fe≤5.0%, Co≤1.0%, Mn≤0.5%, surplus Ni.
Embodiment 3
A kind of Ni-based functionally gradient material (FGM) is made of 718 Ni-base Superalloy Powders of Inconel, and the Ni-based functionally gradient material (FGM) is every
The grain size of layer changes in gradient, presses abccba sequence cycle arrangements, wherein a layer of mean grain size is 0.3 μm, and b layers are put down
Equal grain size is 0.6 μm, and c layers of mean grain size is 1.3 μm.
Wherein the grain size of 718 Ni-base Superalloy Powders of Inconel be 3.5~40 μm, chemical composition be Ni 50~
55%, Cr 17.0~21.0%, Mo 2.8~3.3%, Nb 4.75~5.5%, Al 0.2~0.8%, Ti 0.65~
1.15%, C≤0.08%, Si≤0.35%, S≤0.015%, Cu≤0.30%, Mn≤0.35%, B≤0.006%, surplus
For Fe.
Embodiment 4
The method that precinct laser fusion method prepares Ni-based functionally gradient material (FGM), steps are as follows：
Step 1：The threedimensional model for establishing Ni-based functionally gradient material (FGM) to be prepared carries out slicing delamination to threedimensional model, obtains
The data in each section simultaneously import data to quickly shaping device；
Step 2：The technological parameter of each drip molding is set on quickly shaping device, by xyzzyx sequence cycle facilities
Powdering thickness, wherein x layer powdering thickness are 0.04mm, and y layers of powdering thickness are 0.05mm, and z layers of powdering thickness are 0.06mm；
Step 3：It is successively laid with Ni-base Superalloy Powder according to powdering mode described in step 2, in certain scanning room
Away from, powder, and Quick-forming successively melted using the scan mode control laser for tilting subregion under sweep speed, laser power
Ni-based functionally gradient material (FGM) is made.
Embodiment 5
The method that precinct laser fusion method prepares Ni-based functionally gradient material (FGM), steps are as follows：
Step 1：The threedimensional model for establishing Ni-based functionally gradient material (FGM) to be prepared carries out slicing delamination to threedimensional model, obtains
The data in each section simultaneously import data to quickly shaping device；
Step 2：The technological parameter of each drip molding is set on quickly shaping device, by xyzzyx sequence cycle facilities
Powdering thickness, wherein x layer powdering thickness are 0.04mm, and y layers of powdering thickness are 0.05mm, and z layers of powdering thickness are 0.06mm；
Step 3：625 Ni-base Superalloy Powders of Inconel are successively laid with according to powdering mode described in step 2, are being swept
It retouches under spacing 0.07mm, sweep speed 850mm/s, laser power 285W using the scan mode control laser for tilting 67 ° of subregion
Device successively melts powder, and Ni-based functionally gradient material (FGM) is made in Quick-forming.
Wherein the grain size of 625 Ni-base Superalloy Powders of Inconel be 3.5~40 μm, chemical composition be Cr 20.0~
23.0%, Mo 8.0~10.0%, Nb 3.15~4.15%, P≤0.015%, C≤0.10%, Si≤0.5%, Al≤
0.4%, Ti≤0.4%, S≤0.015%, Fe≤5.0%, Co≤1.0%, Mn≤0.5%, surplus Ni.
Embodiment 6
The method that precinct laser fusion method prepares Ni-based functionally gradient material (FGM), steps are as follows：
Step 1：The threedimensional model for establishing Ni-based functionally gradient material (FGM) to be prepared carries out slicing delamination to threedimensional model, obtains
The data in each section simultaneously import data to quickly shaping device；
Step 2：The technological parameter of each drip molding is set on quickly shaping device, by xyzzyx sequence cycle facilities
Powdering thickness, wherein x layer powdering thickness are 0.04mm, and y layers of powdering thickness are 0.05mm, and z layers of powdering thickness are 0.06mm；
Step 3：625 Ni-base Superalloy Powders of Inconel are successively laid with according to powdering mode described in step 2, are being swept
It retouches under spacing 0.09mm, sweep speed 1050mm/s, laser power 285W using the scan mode control laser for tilting 67 ° of subregion
Device successively melts powder, and Ni-based functionally gradient material (FGM) is made in Quick-forming.
Wherein the grain size of 625 Ni-base Superalloy Powders of Inconel be 3.5~40 μm, chemical composition be Cr 20.0~
23.0%, Mo 8.0~10.0%, Nb 3.15~4.15%, P≤0.015%, C≤0.10%, Si≤0.5%, Al≤
0.4%, Ti≤0.4%, S≤0.015%, Fe≤5.0%, Co≤1.0%, Mn≤0.5%, surplus Ni.
Embodiment 7
The method that precinct laser fusion method prepares Ni-based functionally gradient material (FGM), steps are as follows：
Step 1：The threedimensional model for establishing Ni-based functionally gradient material (FGM) to be prepared carries out slicing delamination to threedimensional model, obtains
The data in each section simultaneously import data to quickly shaping device；
Step 2：The technological parameter of each drip molding is set on quickly shaping device, by xyzzyx sequence cycle facilities
Powdering thickness, wherein x layer powdering thickness are 0.04mm, and y layers of powdering thickness are 0.05mm, and z layers of powdering thickness are 0.06mm；
Step 3：718 Ni-base Superalloy Powders of Inconel are successively laid with according to powdering mode described in step 2, are being swept
It retouches under spacing 0.08mm, sweep speed 750mm/s, laser power 255W using the scan mode control laser for tilting 67 ° of subregion
Device successively melts powder, and Ni-based functionally gradient material (FGM) is made in Quick-forming.
Wherein the grain size of 718 Ni-base Superalloy Powders of Inconel be 3.5~40 μm, chemical composition be Ni 50~
55%, Cr 17.0~21.0%, Mo 2.8~3.3%, Nb 4.75~5.5%, Al 0.2~0.8%, Ti 0.65~
1.15%, C≤0.08%, Si≤0.35%, S≤0.015%, Cu≤0.30%, Mn≤0.35%, B≤0.006%, surplus
For Fe.
Embodiment 8
The method that precinct laser fusion method prepares Ni-based functionally gradient material (FGM), steps are as follows：
Step 1：The threedimensional model for establishing Ni-based functionally gradient material (FGM) to be prepared carries out slicing delamination to threedimensional model, obtains
The data in each section simultaneously import data to quickly shaping device；
Step 2：The technological parameter of each drip molding is set on quickly shaping device, by xyzzyx sequence cycle facilities
Powdering thickness, wherein x layer powdering thickness are 0.04mm, and y layers of powdering thickness are 0.05mm, and z layers of powdering thickness are 0.06mm；
Step 3：718 Ni-base Superalloy Powders of Inconel are successively laid with according to powdering mode described in step 2, are being swept
It retouches under spacing 0.08mm, sweep speed 950mm/s, laser power 315W using the scan mode control laser for tilting 67 ° of subregion
Device successively melts powder, and Ni-based functionally gradient material (FGM) is made in Quick-forming.
Wherein the grain size of 718 Ni-base Superalloy Powders of Inconel be 3.5~40 μm, chemical composition be Ni 50~
55%, Cr 17.0~21.0%, Mo 2.8~3.3%, Nb 4.75~5.5%, Al 0.2~0.8%, Ti 0.65~
1.15%, C≤0.08%, Si≤0.35%, S≤0.015%, Cu≤0.30%, Mn≤0.35%, B≤0.006%, surplus
For Fe.
Comparative example 1
Comparative example 1 is differed only in embodiment 5, and the powdering thickness of 1 step 2 of comparative example is only 0.04mm.
Comparative example 2
Comparative example 2 is differed only in embodiment 5, and the powdering thickness of 2 step 2 of comparative example is only 0.05mm.
Comparative example 3
Comparative example 3 is differed only in embodiment 5, and the powdering thickness of 3 step 2 of comparative example is only 0.06mm.
Fig. 1 is the metallographic structure collection of illustrative plates for the Ni-based functionally gradient material (FGM) that embodiment 5 provides；As seen from Figure 1 by a layers, b layers extremely
C layers of crystal grain quantity gradually decreases, but grain size gradually increases, wherein a layers of mean grain size is 0.3 μm, and b layers are averaged
Grain size is 0.6 μm, and c layers of mean grain size is 1.3 μm.
Fig. 2 is the fracture apperance scanning electron microscope (SEM) photograph for the Ni-based functionally gradient material (FGM) that embodiment 5 provides；As seen from Figure 2, Ni-based
Crackle and micropore is not present in the fracture surface of functionally gradient material (FGM).
The metallographic structure for the nickel-base material that Fig. 3 is prepared for the precinct laser fusion method that 1 powdering thickness of comparative example is only 0.04
Collection of illustrative plates；As seen from Figure 3, the crystal grain distribution of nickel-base material is irregular, and grain size, close to same, mean grain size is 1 μm.
Fig. 4 is the fracture apperance scanning electron microscope (SEM) photograph for the nickel-base material that comparative example 1 provides；As seen from Figure 4, material is disconnected
There are a plurality of crackles for discharge surface.
The preparation method of 1 single powdering thickness of comparative example is in precinct laser fusion method forming process, due to the spoke of laser
It penetrates so that current cladding layer is rapidly heated, temperature gradient is big between current cladding layer and lower layer's solidified structure, current cladding layer
Expansion is generated residualinternal stress by the constraint of lower layer's solidification material, and lower layer's solidification layer is forced to generate the modeling towards laser direction
Property deformation.And the residualinternal stress generated in cooling procedure equally generates towards the plasticity of laser direction in solidification interlayer and becomes
Shape.Under high temperature, when the breaking resistance of sample is insufficiently resistant to residualinternal stress, it may result in crackle and generate and expand in material internal
The generation of exhibition, crackle makes material be easy cracking, reduces the plasticity and toughness of material.
Embodiment 5 is using the powdering side that different powdering thickness 0.04mm, 0.05mm and 0.06mm are in xyzzyx gradients cycle
Ni-based functionally gradient material (FGM) prepared by formula and the scan mode for tilting 67 ° of the subregion circulation change in gradient in crystal grain distribution, makes material
Different is presented in surface layer and interior mechanics performance, can be released effectively the internal stress that material generates under the cool condition of pole, reduces
The generation of crackle and micropore so that material can will not crack after carrying is compared with big load, have good plasticity and toughness.
By the sample of nickel-base material made from Ni-based functionally gradient material (FGM) made from embodiment 5 and comparative example 1-3 in high-speed wire linear
It is averagely cut into three on cutting machine, is polishing to surface-brightening, the rugged protrusion of removal specimen surface simultaneously complies with
Tensile sample size measures the tensile property of material on CSS electronic universal testers, and there are three every group of samples, is averaged
The tensile property for obtaining material afterwards introduces three standards to compare the tensile property of material：ASTM F3056-14、ASTM
B446-03 and GJB 3317A-2008.Wherein, ASTM F3056-14 are drawing of the material increasing field to 625 materials of Inconel
Stretch performance standard；ASTM B446-03 are the tensile property standard of 625 forging of conventional annealing state Inconel；GJB 3317A-
2008 be the alloy hot rolled standard of China's aerial high-temperature, and comparing result is as shown in table 1 and Fig. 7：
Table 1
From the data in table 2, it can be seen that yield strength, the tensile strength of the material prepared by embodiment 5 and comparative example 1-3 are remote high
In the numerical value of three groups of contrast standards, but the elongation after fracture for the Ni-based functionally gradient material (FGM) that only prepared by embodiment 5 is higher than three groups of comparisons
The elongation after fracture of the numerical value of standard, nickel-base material prepared by comparative example 1-3 is below standard.
The stress for the nickel-base material that the Ni-based functionally gradient material (FGM) and comparative example 1-3 provided in conjunction with embodiment 5 shown in Fig. 7 provides
Strain curve can absolutely prove that the present invention uses the nickel that different powdering thickness are obtained in the powdering mode of xyzzyx gradients cycle
Based gradient material has better plasticity compared with nickel-base material prepared by single powdering thickness.
Nickel-base material made from Ni-based functionally gradient material (FGM) made from embodiment 5 and comparative example 1-3 is analyzed, using draining
Method tests consistency, and using microhardness is measured on HXD-1000 type microhardness testers, the results are shown in Table 2,
Table 2
The powdering mode that embodiment 5 is recycled using different powdering thickness in xyzzyx gradients it can be seen from data in table 2
The nickel-base material that the consistency and microhardness of the Ni-based functionally gradient material (FGM) prepared are prepared with single powdering thickness is consistent substantially,
And it is slightly promoted, i.e., preparation method provided by the invention is improved on the basis of ensureing material density and microhardness
The plasticity and toughness of Ni-based functionally gradient material (FGM).
Claims (10)
1. a kind of Ni-based functionally gradient material (FGM), it is characterised in that the grain size of Ni-based every layer of the functionally gradient material (FGM) changes in gradient, presses
Abccba sequence cycle arrangements, wherein a layers of mean grain size are 0.3 μm, b layer of mean grain size is 0.6 μm, and c layers are put down
Equal grain size is 1.3 μm.
2. a kind of Ni-based functionally gradient material (FGM) according to claim 1, it is characterised in that the Ni-based functionally gradient material (FGM) is by Inconel
625 Ni-base Superalloy Powders or 718 Ni-base Superalloy Powders of Inconel are made.
3. a kind of Ni-based functionally gradient material (FGM) according to claim 2, it is characterised in that 625 nickel base superalloys of the Inconel
The grain size of powder be 3.5~40 μm, chemical composition be Cr 20.0~23.0%, Mo 8.0~10.0%, Nb 3.15~
4.15%, P≤0.015%, C≤0.10%, Si≤0.5%, Al≤0.4%, Ti≤0.4%, S≤0.015%, Fe≤
5.0%, Co≤1.0%, Mn≤0.5%, surplus Ni.
4. a kind of Ni-based functionally gradient material (FGM) according to claim 2, it is characterised in that 718 nickel base superalloys of the Inconel
The grain size of powder be 3.5~40 μm, chemical composition be Ni 50~55%, Cr 17.0~21.0%, Mo 2.8~3.3%,
Nb4.75~5.5%, Al 0.2~0.8%, Ti 0.65~1.15%, C≤0.08%, Si≤0.35%, S≤0.015%,
Cu≤0.30%, Mn≤0.35%, B≤0.006%, surplus Fe.
5. the method that precinct laser fusion method prepares Ni-based functionally gradient material (FGM), it is characterised in that steps are as follows for the method：
Step 1：The threedimensional model for establishing Ni-based functionally gradient material (FGM) to be prepared carries out slicing delamination to threedimensional model, obtains each
The data in section simultaneously import data to quickly shaping device；
Step 2：The technological parameter of each drip molding is set on quickly shaping device, powdering is circularly set by xyzzyx sequences
Thickness, wherein x layer powdering thickness are 0.04mm, and y layers of powdering thickness are 0.05mm, and z layers of powdering thickness are 0.06mm；
Step 3：It is successively laid with Ni-base Superalloy Powder according to powdering mode described in step 2, in certain sweep span, is swept
It retouches and powder is successively melted using the scan mode control laser for tilting subregion under speed, laser power, and Quick-forming is made
Ni-based functionally gradient material (FGM).
6. the method that precinct laser fusion method prepares Ni-based functionally gradient material (FGM) according to claim 5, it is characterised in that step 3
The Ni-base Superalloy Powder is 718 nickel base superalloy powder of 625 Ni-base Superalloy Powders of Inconel or Inconel
End.
7. the method that precinct laser fusion method prepares Ni-based functionally gradient material (FGM) according to claim 6, it is characterised in that described
The grain size of 625 Ni-base Superalloy Powders of Inconel is 3.5~40 μm, and chemical composition is Cr 20.0~23.0%, Mo8.0
~10.0%, Nb 3.15~4.15%, P≤0.015%, C≤0.10%, Si≤0.5%, Al≤0.4%, Ti≤0.4%, S
≤ 0.015%, Fe≤5.0%, Co≤1.0%, Mn≤0.5%, surplus Ni.
8. the method that precinct laser fusion method prepares Ni-based functionally gradient material (FGM) according to claim 6, it is characterised in that described
The grain size of 718 Ni-base Superalloy Powders of Inconel be 3.5~40 μm, chemical composition be Ni 50~55%, Cr 17.0~
21.0%, Mo 2.8~3.3%, Nb 4.75~5.5%, Al 0.2~0.8%, Ti 0.65~1.15%, C≤0.08%,
Si≤0.35%, S≤0.015%, Cu≤0.30%, Mn≤0.35%, B≤0.006%, surplus Fe.
9. the method for preparing Ni-based functionally gradient material (FGM) according to the precinct laser fusion method of claim 7 or 8, it is characterised in that step
Three sweep spans be 0.07~0.09mm, the sweep speed be 650~1050mm/s, the laser power be 225~
345W。
10. the method that precinct laser fusion method prepares Ni-based functionally gradient material (FGM) according to claim 9, it is characterised in that step 3
The angle for tilting subregion is 67 °.
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