CN115433851B - Preparation method of low-cost high-strength and high-toughness 3D printing Ti-Fe-O alloy - Google Patents
Preparation method of low-cost high-strength and high-toughness 3D printing Ti-Fe-O alloy Download PDFInfo
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- CN115433851B CN115433851B CN202211284316.9A CN202211284316A CN115433851B CN 115433851 B CN115433851 B CN 115433851B CN 202211284316 A CN202211284316 A CN 202211284316A CN 115433851 B CN115433851 B CN 115433851B
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 63
- 239000000956 alloy Substances 0.000 title claims abstract description 63
- 238000010146 3D printing Methods 0.000 title claims abstract description 48
- 229910017135 Fe—O Inorganic materials 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000005242 forging Methods 0.000 claims description 23
- 238000007639 printing Methods 0.000 claims description 19
- 238000003723 Smelting Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 11
- 238000000889 atomisation Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 238000009689 gas atomisation Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 241001062472 Stokellia anisodon Species 0.000 claims 1
- 229910001069 Ti alloy Inorganic materials 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 11
- 230000007547 defect Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000010936 titanium Substances 0.000 description 5
- 230000000087 stabilizing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 231100000701 toxic element Toxicity 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
-
- 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
- B22F10/60—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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- 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
-
- 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 invention discloses a preparation method of a low-cost high-strength and high-toughness 3D printing Ti-Fe-O alloy, and belongs to the technical field of 3D printing. According to the invention, by adjusting the preparation method of the Ti-Fe-O alloy powder, the technological parameters of 3D printing and the like, the 3D printing product with the density reaching 99.8%, the yield strength reaching 1560MPa and the fracture strain reaching 4-6% is obtained, and then the high-strength and high-toughness Ti-Fe-O alloy with the strength combined with the plasticity is obtained through heat treatment. The invention also solves the problem that air holes and other defects are easy to generate in the 3D printing process, obtains the titanium alloy with excellent performance, and has great application prospect in the engineering fields of three-way, chemical industry, medical treatment and the like.
Description
Technical Field
The invention relates to the technical field of 3D printing, in particular to a preparation method of a low-cost high-strength and high-toughness 3D printing Ti-Fe-O alloy.
Background
SLM (selective laser melting) is used as a main technology in 3D printing of metal materials, and can solve the problem of complex-structure metal parts which are difficult to realize in traditional manufacturing. However, in the 3D printing process, the internal stress of the workpiece is high due to the fact that the cooling speed of the workpiece is too high, meanwhile, defects such as spheroidization, cracks, pores and local buckling deformation and the like can occur in the workpiece due to improper selection of process parameters, and the performance of the workpiece is seriously affected, so that the performance of the existing 3D printed titanium alloy workpiece still has a large lifting space. In addition, the TC4 alloy widely used at present has excellent mechanical properties, but the components of the TC4 alloy contain expensive metal V and toxic metal Al, so that the further application of the TC4 alloy is limited.
Disclosure of Invention
The invention aims to provide a preparation method of a low-cost high-strength and high-toughness 3D printing Ti-Fe-O alloy, which is used for solving the problems existing in the prior art, and the Ti-Fe-O alloy with excellent strength and plasticity matching performance (the mechanical property is obviously superior to that of the 3D printing TC4 alloy reported at present) is prepared by replacing an Al element with an O element and replacing a V element, so that the problem that the TC4 alloy contains expensive metal and toxic metal is solved, and the limitation of TC4 in application is broken.
In order to achieve the above object, the present invention provides the following solutions:
one of the technical schemes of the invention is as follows: the low-cost high-strength and toughness 3D printing Ti-Fe-O alloy comprises the following components in percentage by mass: 3.5 to 6.0 percent of Fe, 0.3 to 0.6 percent of O, and the balance of Ti and unavoidable impurities.
The alpha-phase stabilizing element in the TC4 alloy which is most commonly used at present is toxic element Al, and the nontoxic O element is used for replacing the toxic Al element to be used as the alpha-phase stabilizing element in the titanium alloy, so that the Al element harmful to human bodies in the titanium alloy is eliminated.
O element (O element is TiO) 2 Introduced in the form of (2) is controlled to be 0.3% -0.6% in mass fraction, and the strength can be greatly improved on the premise of not sacrificing plasticity.
The beta-phase stabilizing element in the titanium alloy TC4 which is most commonly used at present is V element, but V element is expensive metal element, and the Fe element is used for replacing the V element to serve as the beta-phase stabilizing element in the titanium alloy, so that the cost of the titanium alloy is greatly reduced.
The mass fraction of Fe element is controlled to be 3.5% -6.0%, so that better stabilization and strengthening effects can be realized.
Furthermore, the low-cost high-strength and high-toughness 3D printing Ti-Fe-O alloy comprises the following components in percentage by mass: 4.0% of Fe, 0.4% of O and the balance of Ti.
The second technical scheme of the invention is as follows: the preparation method of the low-cost high-strength and high-toughness 3D printing Ti-Fe-O alloy comprises the following steps:
(1) Preparing Ti-Fe-O alloy powder (Ti-Fe-O alloy powder material for SLM printing) by adopting the component raw materials of the Ti-Fe-O alloy;
(2) And 3D printing is carried out by adopting the Ti-Fe-O alloy powder, and then heat treatment is carried out, so that the low-cost high-strength and high-toughness 3D printing Ti-Fe-O alloy is obtained.
Further, the preparation of the Ti-Fe-O alloy powder specifically comprises:
weighing the raw materials of each component according to the mass percentage, and sequentially carrying out vacuum consumable smelting, forging, secondary precision forging, atomization processing, primary powder drying, powder screening and secondary powder drying to obtain the Ti-Fe-O alloy powder.
Further, the times of vacuum consumable smelting are three times; the diameter of the alloy cast ingot obtained by vacuum consumable smelting is 300mm.
The current of the first vacuum consumable smelting is 3000-5500A, the voltage is 15-35V, and the vacuum degree is less than or equal to 1.5X10 - 1 Pa；
The current of the secondary vacuum consumable smelting is 4000-7000A, the voltage is 20-40V, and the vacuum degree is less than or equal to 1.5X10 - 1 Pa；
The third vacuum consumable smelting has current of 5000-8000A, voltage of 20-40V and vacuum degree less than or equal to 1.5X10 - 1 Pa；
Further, the forging (skin forging and cogging forging) temperature is 1100 ℃, and the forging vacuum degree is less than or equal to 1.5X10) -1 Pa, and the diameter of a forged piece obtained by forging is 100mm;
the temperature of the secondary precision forging is 960 ℃; the diameter of the forging piece obtained by the secondary precision forging is 55mm, and then the forging piece is processed into a bar with the diameter of 50mm by a peeling machine;
the atomization processing is electrode induction melting gas atomization, and the vacuum degree of the atomization processing is less than or equal to 1.5X10 -2 Pa, pressure of 40+ -1 bar, power of 22+ -1 kw, feed rate of 28+ -1 mm/min;
the temperature of the primary drying and the secondary drying of the powder is 110 ℃, the time is 6 hours, and the vacuum degree is 5 multiplied by 10 -2 Pa；
The powder screening is to screen alloy powder with the grain diameter of 15-53 mu m.
The powder is subjected to primary drying, screening and secondary drying, so that the powder can obtain better fluidity.
The titanium alloy has higher melting point, so that parameters such as laser power, scanning speed, layer thickness, scanning interval, partition width and the like need to be comprehensively adjusted to obtain the 3D printing titanium alloy with high density and excellent performance, so that the obtained energy density can completely melt powder without generating more defects.
Further, the process parameters of the 3D printing (SLM printing) are: the temperature of the substrate preheating is 150-200 ℃, the laser power is 150-300W, the scanning speed is 1000-1400 mm/s, the layer thickness is 30 μm, the scanning interval is 105 μm, and the partition width is 8mm;
each layer of printing path of the 3D printing is required to rotate 67 degrees clockwise on the basis of the previous layer of printing path; and the printing path adopts a mode (scanning mode) of combining detour and stripes, so that the problems of accumulation of internal stress, generation of in-plane anisotropy and reduction of printing efficiency in the printing process are avoided.
The substrate is made of titanium alloy, so that the problem of weak connection between the workpiece and the substrate due to poor wettability caused by material difference can be avoided.
The substrate preheating can reduce the generation of internal stress in the printing process.
Further, the laser power is 200W, and the scanning speed is 1200mm/s.
Further, the annealing temperature of the heat treatment is 600-800 ℃, the heating rate is 20-50 ℃/min, the heat preservation time is 1-10 h, and the vacuum degree is less than or equal to 5 multiplied by 10 -1 Pa, the cooling mode is furnace cooling.
The Ti-Fe-O alloy obtained by 3D printing (before heat treatment) has high compactness and ultrahigh strength (yield strength is up to 1560 MPa), and exceeds all the currently disclosed 3D printing TC4 alloy, but the microstructure of the Ti-Fe-O alloy is acicular martensite, and is a metastable structure, and has high strength, but has poor deformation coordination capability (the 3D printing titanium alloy can generate larger internal stress and poor microstructure due to the reasons of high cooling speed of 3D printing, poor heat conductivity of the titanium alloy and the like, so that the plasticity of the alloy is reduced, the fracture strain of the alloy is only about 4% -6%), and the Ti-Fe-O alloy with excellent strength and plasticity matching performance can be obtained through heat treatment (the heat treatment can furthest reduce the internal stress, improve the microstructure and improve the comprehensive performance of the material).
Further, the annealing temperature of the heat treatment is 620 ℃, the heating rate is 30 ℃/min, and the heat preservation time is 1h.
Further, the annealing temperature of the heat treatment is 620 ℃, the heating rate is 30 ℃/min, and the heat preservation time is 10h.
Further, the annealing temperature of the heat treatment is 800 ℃, the heating rate is 30 ℃/min, and the heat preservation time is 1h.
The invention discloses the following technical effects:
the low-cost high-strength and high-toughness 3D printing Ti-Fe-O alloy does not contain toxic element Al and expensive metal element V, eliminates elements harmful to human bodies in the titanium alloy, and reduces the preparation cost of the titanium alloy.
According to the invention, by adjusting the preparation method of the Ti-Fe-O alloy powder, the technological parameters of 3D printing and the like, the 3D printing product with the density reaching 99.8%, the yield strength reaching 1560MPa and the fracture strain reaching 4-6% is obtained, and then the high-strength and high-toughness Ti-Fe-O alloy with the strength combined with the plasticity is obtained through heat treatment.
The invention not only solves the defect that air holes are easy to generate in the 3D printing process, but also obtains the titanium alloy with excellent performance, and has great application prospect in the engineering fields of three-way, chemical industry, medical treatment and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a scanning pattern for preparing a 3D printed article according to example 1 of the present invention.
Detailed Description
Various exemplary embodiments of the invention will now be described in detail, which should not be considered as limiting the invention, but rather as more detailed descriptions of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the invention described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present invention. The specification and examples are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
The raw materials Ti, fe and TiO employed in the following examples of the invention 2 The purity of (3) was 99.95%.
Example 1
A preparation method of a low-cost high-strength and high-toughness 3D printing Ti-Fe-O alloy comprises the following steps:
the low-cost high-strength and toughness 3D printing Ti-Fe-O alloy consists of the following components in percentage by mass: fe 4.0%, O0.4%, impurity content less than 0.02%, and the balance of Ti.
(1) Preparation of Ti-Fe-O alloy powders
A. Weighing Ti, fe and TiO as raw materials in percentage by mass 2 (O element is composed of TiO 2 Providing) carrying out three times of vacuum consumable smelting to obtain an alloy cast ingot with the diameter of 300 mm;
the current of the first vacuum consumable smelting is 4200A, the voltage is 25V, and the vacuum degree is 1.5X10 -1 Pa；
The current of the secondary vacuum consumable smelting is 5500A, the voltage is 30V, and the vacuum degree is less than or equal to 1.5X10 -1 Pa；
The third vacuum consumable smelting has current 6500A, voltage 30V and vacuum degree 1.5X10 -1 Pa。
B. And (3) performing skinning forging and cogging forging on the alloy ingot at the forging temperature of 1100 ℃ to obtain a forging with the diameter of 100 mm.
C. The forging was subjected to secondary precision forging (precision forging temperature: 960 ℃ C.) to obtain a forging with a diameter of 55mm, and then a bar with a diameter of 50mm was machined by a scalping machine.
D. The rod material was subjected to atomization processing (electrode induction melting gas atomization) under the following conditions: vacuum degree of 1.5X10 -2 Pa, atomization pressure of 40+ -1 bar, power of 22+ -1 kw, feed rate of 28+ -1 mm/min, and inert gas as atomized gas to obtain alloy powder.
E. The alloy powder is heated to 110 ℃ and the vacuum degree is 5 multiplied by 10 -2 Continuously drying (primary drying) under Pa for 6h, sieving to obtain alloy powder with particle diameter of 15-53 μm, and vacuum-drying at 110deg.C under vacuum degree of 5×10 -2 And under the condition of Pa, continuously drying (secondary drying) for 6 hours to obtain Ti-Fe-O alloy powder.
(2) Preparation of 3D printed articles
Taking TC4 alloy (titanium alloy) as a substrate, preheating the substrate to 200 ℃, introducing argon into a printing bin before printing, controlling the oxygen content to be less than or equal to 200ppm, and then performing 3D printing, wherein the technological parameters of the 3D printing are as follows: the laser power is 200W, the scanning speed is 1200mm/s, the layer thickness is 0.03mm, the scanning interval is 105 mu m, the printing mode is carried out in a mode of combining 'detour' and 'stripes' (the schematic diagram of the scanning mode is shown in figure 1), each layer of printing path rotates 67 degrees compared with the printing path of the previous layer, the width of the 'stripe' is 8mm, and the 3D printing part with the size of 40 x 40mm is manufactured.
(3) 3D printing Ti-Fe-O alloy
Cooling the 3D printing part to room temperature, placing the 3D printing part into a crucible, then placing the crucible and the crucible into a vacuum heat treatment furnace, and vacuumizing to a vacuum degree of 5 multiplied by 10 -1 Pa, heating to 620 ℃ at a heating rate of 30 ℃/min, preserving heat for 1h, naturally cooling the furnace temperature after heat treatment to room temperature, and taking out to obtain the low-cost high-toughness 3D printing Ti-Fe-O alloy (3D printing alloy).
Example 2
The difference from example 1 is that the incubation time in step (3) is 10h.
Example 3
The difference from example 1 is that the annealing temperature in step (3) is 800 ℃.
The mechanical properties of the 3D printed parts (before heat treatment) and 3D printed alloys (after heat treatment) prepared in examples 1 to 3 were measured and the results are shown in table 1.
TABLE 1
There is little effect on the density of the alloy before and after heat treatment.
Comparative example 1
The difference from example 1 is that the process parameters for 3D printing are as follows: the laser power is 200W, the scanning speed is 1000mm/s, the layer thickness is 0.03mm, the scanning interval is 105 mu m, the printing mode is carried out in a mode of combining 'detour' and 'stripe', each layer of printing path rotates 67 degrees compared with the printing path of the previous layer, the width of 'stripe' is 8mm, and the 3D printing part with the size of 40 x 40mm is manufactured.
The density of the 3D printing alloy obtained after heat treatment is 98.8%.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (5)
1. The low-cost high-strength and toughness 3D printing Ti-Fe-O alloy is characterized by comprising the following components in percentage by mass: 3.5-6.0% of Fe, 0.3-0.6% of O, and the balance of Ti and unavoidable impurities;
the preparation method of the low-cost high-strength and toughness 3D printing Ti-Fe-O alloy comprises the following steps:
(1) Preparing Ti-Fe-O alloy powder by adopting the component raw materials;
(2) 3D printing is carried out by adopting the Ti-Fe-O alloy powder, and then heat treatment is carried out, so that the low-cost high-strength and high-toughness 3D printing Ti-Fe-O alloy is obtained;
the technological parameters of the 3D printing are as follows: the preheating temperature of the substrate is 150-200 ℃, the laser power is 150-300W, the scanning speed is 1000-1400 mm/s, the layer thickness is 30 mu m, the scanning interval is 105 mu m, and the partition width is 8mm;
each layer of printing path of the 3D printing is integrally rotated by 67 degrees clockwise on the basis of the printing path of the previous layer, and the printing path adopts a mode of combining detour and stripes;
the annealing temperature of the heat treatment is 600-800 ℃, the heating rate is 20-50 ℃/min, the heat preservation time is 1-10 h, and the vacuum degree is less than or equal to 5 multiplied by 10 -1 Pa, the cooling mode is furnace cooling.
2. The low cost high strength and toughness 3D printed Ti-Fe-O alloy of claim 1, wherein the preparation of the Ti-Fe-O alloy powder specifically comprises:
weighing the raw materials of each component according to the mass percentage, and sequentially carrying out vacuum consumable smelting, forging, secondary precision forging, atomization processing, powder drying and powder screening to obtain the Ti-Fe-O alloy powder.
3. The low cost high strength and toughness 3D printed Ti-Fe-O alloy according to claim 2, wherein the number of times the vacuum consumable smelt is three;
the current of the primary vacuum consumable smelting is 3000-5500A, the voltage is 15-35V, and the vacuum degree is less than or equal to 1.5X10 -1 Pa；
The current of the secondary vacuum consumable smelting is 4000-7000A, the voltage is 20-40V, and the vacuum degree is less than or equal to 1.5X10 -1 Pa；
The third vacuum consumable smelting has current of 5000-8000A, voltage of 20-40V and vacuum degree less than or equal to 1.5X10 -1 Pa。
4. The low cost high strength and toughness 3D printed Ti-Fe-O alloy according to claim 2, wherein the forging temperature is 1100 ℃; the temperature of the secondary precision forging is 960 ℃; the atomization processing is electrode induction melting gas atomization, and the vacuum degree of the atomization processing is less than or equal to 1.5X10 -2 Pa, pressure of 40+ -1 bar, power of 22+ -1 kw, feed rate of 28+ -1 mm/min; the powder is dried at 110deg.C for 6 hr with vacuum degree of 5×10 -2 Pa; the powder screening is to screen alloy powder with the particle size of 15-53 mu m.
5. The low cost high strength and toughness 3D printed Ti-Fe-O alloy according to claim 1, wherein the laser power is 200W and the scan speed is 1200mm/s.
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| JP2001089821A (en) * | 1999-09-22 | 2001-04-03 | Sumitomo Metal Ind Ltd | Titanium alloy having high strength and high ductility and excellent in high temperature atmospheric oxidation resistance |
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| CN107406917A (en) * | 2015-03-23 | 2017-11-28 | 株式会社神户制钢所 | Titanium plate, heat exchanger are with plate and fuel cell distance piece |
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| CN110106396A (en) * | 2019-06-14 | 2019-08-09 | 重庆文理学院 | A kind of excellent in mechanical performance titanium alloy and preparation method thereof |
| CN112981177A (en) * | 2021-02-20 | 2021-06-18 | 上海交通大学 | Titanium alloy powder capable of being used for selective laser melting 3D printing, selective laser melting titanium alloy and preparation thereof |
| CN114101704A (en) * | 2021-11-23 | 2022-03-01 | 中北大学 | High-strength TC4-BN alloy containing equiaxed crystal and columnar crystal mixed structure and preparation method thereof |
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| CN107406917A (en) * | 2015-03-23 | 2017-11-28 | 株式会社神户制钢所 | Titanium plate, heat exchanger are with plate and fuel cell distance piece |
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| CN110106396A (en) * | 2019-06-14 | 2019-08-09 | 重庆文理学院 | A kind of excellent in mechanical performance titanium alloy and preparation method thereof |
| CN112981177A (en) * | 2021-02-20 | 2021-06-18 | 上海交通大学 | Titanium alloy powder capable of being used for selective laser melting 3D printing, selective laser melting titanium alloy and preparation thereof |
| CN114101704A (en) * | 2021-11-23 | 2022-03-01 | 中北大学 | High-strength TC4-BN alloy containing equiaxed crystal and columnar crystal mixed structure and preparation method thereof |
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