CN114351004A - Low-cost titanium alloy wire for electric arc additive and manufacturing method of structural member of low-cost titanium alloy wire - Google Patents
Low-cost titanium alloy wire for electric arc additive and manufacturing method of structural member of low-cost titanium alloy wire Download PDFInfo
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 128
- 239000000654 additive Substances 0.000 title claims abstract description 62
- 230000000996 additive effect Effects 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 58
- 238000010891 electric arc Methods 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 61
- 238000000034 method Methods 0.000 claims abstract description 53
- 229910000883 Ti6Al4V Inorganic materials 0.000 claims abstract description 38
- 239000010936 titanium Substances 0.000 claims abstract description 30
- 238000000137 annealing Methods 0.000 claims abstract description 21
- 239000000956 alloy Substances 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 12
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 10
- 229910052718 tin Inorganic materials 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 34
- 229910052786 argon Inorganic materials 0.000 claims description 17
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 16
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 229910052719 titanium Inorganic materials 0.000 claims description 15
- 230000007704 transition Effects 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 9
- 229910052748 manganese Inorganic materials 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 abstract description 4
- 238000005242 forging Methods 0.000 description 13
- 238000003723 Smelting Methods 0.000 description 11
- 239000000758 substrate Substances 0.000 description 10
- 230000008859 change Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910018645 Mn—Sn Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses a low-cost titanium alloy wire for electric arc additive, which is prepared from a titanium alloy prefabricated wire and Ti-6Al-4V residual materials and comprises the following components in percentage by mass: 5.5 to 7.0 percent of All, 0.4 to 3.6 percent of V, 0.3 to 2.5 percent of Mn0, 0 to 5.4 percent of Sn, and the balance of Ti and inevitable impurities. The method for preparing the structural member by using the low-cost titanium alloy wire for the electric arc additive comprises the following steps of: preparing the titanium alloy prefabricated wire into a wire material with the diameter of 1.0mm-3.0 mm; preparing Ti-6Al-4V residual material into wire materials with the diameter of 1.0mm-3.0 mm; mixing the titanium alloy prefabricated wire material and the Ti-6Al-4V residual material wire material in a side-by-side bundling or winding mode to prepare a mixed wire; manufacturing a titanium alloy structural member by the mixed wire by adopting an electric arc additive method; and during or after the manufacturing process of the titanium alloy structural part is completed, the residual stress in the titanium alloy structural part is eliminated through vacuum annealing. The invention can make full use of the residual material in the Ti-6Al-4V processing process, and the manufactured titanium alloy material has better mechanical property and can greatly reduce the cost.
Description
Technical Field
The invention relates to the technical field of additive manufacturing of titanium alloy, in particular to a low-cost titanium alloy wire for electric arc additive manufacturing and a manufacturing method of a structural member of the low-cost titanium alloy wire.
Background
The additive manufacturing technology has the advantages of near net shape forming, one-step forming and the like, and can manufacture large metal integral structural parts at one time. The metal solid component is manufactured in a layer-by-layer accumulation mode in the additive manufacturing process, the method has the remarkable advantages of being capable of forming a complex structure, high in manufacturing efficiency and the like, and the titanium alloy additive manufacturing structural component has wide application prospect in the field of key bearing structures of aerospace, ships and marine equipment. According to different heat sources, the method can be divided into laser additive manufacturing, electron beam additive manufacturing, electric arc additive manufacturing and the like; according to the material, it can be divided into powder printing, wire feeding printing, etc. However, compared with the traditional material reduction or equal material manufacturing technology such as forging and rolling, the additive manufacturing has the disadvantages of high equipment cost, limited product forming size, low forming efficiency, high cost of titanium alloy powder wire material in the aspect of material and poor applicability, wherein the high cost is the core problem restricting the additive manufacturing, and the wide application of the additive manufacturing technology is greatly limited.
The major costs of additive manufacturing include equipment costs and raw material costs. In the aspect of equipment cost, the electric arc additive uses high-temperature electric arcs as energy-carrying beams to melt metal wires, the equipment cost is the lowest, special high-energy beam heat sources are needed for laser additive and electron beam additive, and the equipment cost is higher. In the aspect of raw material cost, the market price of the wire is about 100 ten thousand yuan per ton at present, and the price of the powder is as high as 300 one ton and 600 ten thousand yuan per ton. Therefore, arc fuse additive is a promising low-cost additive manufacturing method. However, the cost of equipment and the cost of raw materials are considered comprehensively, the price of the electric arc additive structural part is still more than 200 ten thousand yuan, which is 3-6 times of that of the traditional forging and rolling method, and the development of low-cost electric arc additive manufacturing wire materials, the improvement of the manufacturing method of the structural part and the substantial reduction of the total cost of the structural part are urgently needed.
At present, the main means for reducing the cost of the titanium alloy at home and abroad are adding of residual materials, low-cost component design and the like. The residue addition means that titanium and titanium alloy residues are used for replacing titanium sponge to smelt ingots when titanium and titanium alloy are smelted, so that the cost of the ingots is reduced, wherein the Ti-6Al-4V alloy is used as the titanium alloy with the largest use amount, and the use amount of the Ti-6Al-4V alloy accounts for more than 40% of the total use amount of the titanium alloy. The low-cost component design means that the alloy components do not contain or contain less noble elements such as V, Ta, Nb, Cr and the like. Therefore, how to obtain a titanium alloy structural member with good mechanical properties by applying residue addition and low-cost component design to reduce cost becomes a technical problem to be solved by the applicant.
Disclosure of Invention
The invention aims to provide a low-cost titanium alloy wire for arc additive and a manufacturing method of a structural member of the low-cost titanium alloy wire. The invention can make full use of the residual material in the Ti-6Al-4V processing process, and the manufactured titanium alloy material has better mechanical property and can greatly reduce the cost.
The technical scheme of the invention is as follows: a low-cost titanium alloy wire for electric arc additive is prepared from a titanium alloy prefabricated wire and Ti-6Al-4V residual materials, wherein the titanium alloy wire comprises the following components in percentage by mass: 5.5 to 7.0 percent of Al, 0.4 to 3.6 percent of V, 0.3 to 2.5 percent of Mn, 0 to 5.4 percent of Sn, and the balance of Ti and inevitable impurities.
The low-cost titanium alloy wire for the arc additive comprises the following components in percentage by mass: 5.0 to 8.0 percent of Al, 2.0 to 5.0 percent of Mn, 0 to 6.0 percent of Sn, and the balance of Ti and inevitable impurities.
The manufacturing method of the structural member of the low-cost titanium alloy wire for the arc additive comprises the following steps of:
s1, preparing the titanium alloy prefabricated wire into a wire material with the diameter of 1.0mm-3.0 mm;
s2, preparing Ti-6Al-4V residual materials into wire materials with the diameter of 1.0mm-3.0 mm;
s3, mixing the titanium alloy prefabricated wire material and the Ti-6Al-4V scrap wire material in a side-by-side bundling or winding mode to prepare a mixed wire;
s4, manufacturing the titanium alloy structural part by the mixed wire by adopting an electric arc additive method;
and S5, eliminating residual stress in the titanium alloy structural component through vacuum annealing in the manufacturing process or after the titanium alloy structural component is manufactured.
In the foregoing method for manufacturing a structural member from low-cost titanium alloy wire for arc additive manufacturing, in step S3, the method for manufacturing a titanium alloy structural member by arc additive manufacturing specifically includes the steps of: the method comprises the steps of taking a pure titanium plate or a Ti-6Al-4V alloy plate as a base plate, stacking by a manual or automatic argon tungsten-arc welding method, firstly stacking a transition layer with the thickness of 10mm, then stacking layer by layer until the target size of a titanium alloy structural member is reached, wherein the voltage is 10-15V and the current is 60-180A in the stacking process, protecting by argon gas with the flow of the argon gas being 8-20L/min, and machining to remove the base plate and the transition layer after stacking is completed.
In the manufacturing method of the structural member of the low-cost titanium alloy wire for arc additive, in step S4, the temperature of vacuum annealing is 500-.
According to the manufacturing method of the structural member of the low-cost titanium alloy wire for the electric arc additive, the performance of the titanium alloy structural member is as follows: rm≥800MP、RP0.2≥700MP、A≥10％、KIC≥100MPa·m1/2。
Compared with the prior art, the invention has the following beneficial effects:
1. because Ti-6Al-4V alloy is the titanium alloy with the largest consumption and can generate a large amount of residual materials in the processes of smelting, hot working and the like, the invention utilizes the Ti-6Al-4V residual materials in the titanium alloy processing process and can greatly reduce the cost. In addition, the prefabricated wire adopts low-cost additive elements such as Al, Mn, Sn and the like which are low-cost alloy elements, the cost of the Al, Mn and Sn elements is greatly lower than that of pure titanium, the V, Mo, Nb and other precious elements are not contained, and the cost is greatly reduced from the design cost.
2. The titanium alloy structural member prepared by the invention adopts a design idea of multi-component strengthening and low alloying, namely a Ti-Al-V-Mn-Sn alloy system is adopted, wherein Al is an alpha phase stable element, the phase change point can be further improved while the strength is improved, abnormal growth of crystal grains is prevented, V, Mn is used as a beta phase stable element, the plasticity of the material can be improved, and Sn is a neutral element, and the function is to further improve the strength and the thermal stability of the titanium alloy. The beta stable element in the material of the additive manufacturing structural member is properly reduced, the plasticity and toughness of the material are improved, the tolerance to impurity elements such as C, N, H, O is higher, and the additive manufacturing method is more suitable for residual material recovery and additive manufacturing.
3. The structural member material contains 5.0-9.0 wt% of Al element, the Al element can play an effective solid solution strengthening role in the titanium alloy, the (alpha + beta)/beta transformation point is improved, the Al element can be dissolved in the alpha phase in a solid mode, a compound phase is not generated when the aluminum equivalent is lower than 9 wt%, the strength of the titanium alloy can be improved, and meanwhile, the alloy can keep good plasticity; the prefabricated wire in the invention is added with 0-3.0 wt% of Sn element, the cost of the Sn element is far lower than that of titanium, and the Sn element is used as a neutral element of titanium, so that the ductility and toughness can not be greatly reduced while the strength is properly improved. The structural member material contains 2-4 wt% of V element, vanadium element is obtained by recovering residual materials, extra cost is not increased, and meanwhile vanadium element is used as beta stable element of titanium, and beta phase can be stabilized in titanium when a small amount of vanadium element is added, so that strength and plasticity are improved.
4. The titanium alloy structural member manufactured by the invention has small cold and hot cracking tendency, and has no cold and hot cracks when the thickness of the section of the structural member is not more than 120 mm. Meanwhile, the material components of the final additive manufacturing structural part can be adjusted by changing the proportion of the components and the diameters of the prefabricated wire and the added wire according to the performance requirement. The alloy has good technical application and market prospect in the fields of aerospace, ship, ocean engineering and the like.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Example 1: a low-cost titanium alloy wire for electric arc additive is prepared from a titanium alloy prefabricated wire and Ti-6Al-4V residual materials, and comprises the following components in percentage by mass: 5.5% of Al, 2.0% of V, 2.5% of Mn, and the balance of Ti and inevitable impurities. The titanium alloy prefabricated wire comprises the following components in percentage by mass: 5.0% of Al, 5.0% of Mn, and the balance of Ti and inevitable impurities.
The method for preparing the titanium alloy structural member by using the low-cost titanium alloy wire for electric arc additive comprises the following steps:
s1, preparing a wire material with the diameter of 3.0mm by adopting a titanium alloy prefabricated wire through smelting, forging, drawing and other modes;
s2, adopting Ti-6Al-4V scrap, smelting the scrap into cast ingots through a vacuum consumable electrode furnace or a cold bed furnace, and further preparing wires with the diameter of 3.0mm through ways of cogging, forging change, drawing and the like;
s3, mixing the titanium alloy prefabricated wire material and the Ti-6Al-4V scrap wire material in a side-by-side bundling or winding mode to prepare a mixed wire;
s4, manufacturing the titanium alloy structural part by the mixed wire by adopting an electric arc additive method; the method comprises the following steps: the method comprises the steps of taking a pure titanium plate or a Ti-6Al-4V alloy plate as a substrate, stacking by a manual or automatic argon tungsten-arc welding method, firstly stacking a transition layer with the thickness of 10mm, then stacking layer by layer until the target size of a titanium alloy structural member is reached, wherein the voltage is 10V and the current is 60A in the stacking process, protecting by adopting argon gas with the flow of 8L/min, and machining to remove the substrate and the transition layer after stacking is completed.
And S5, eliminating residual stress in the titanium alloy structural component through vacuum annealing in the manufacturing process or after the titanium alloy structural component is manufactured. In this example, the temperature of the vacuum annealing was 500 ℃ and the annealing time was 1 hour.
Example 2: a low-cost titanium alloy wire for electric arc additive is prepared from a titanium alloy prefabricated wire and Ti-6Al-4V residual materials, and comprises the following components in percentage by mass: 7.0% of Al, 2.0% of V, 1.0% of Mn, 1.1% of Sn, and the balance of Ti and inevitable impurities. The titanium alloy prefabricated wire comprises the following components in percentage by mass: 8.0% of Al, 2.0% of Mn, 2.0% of Sn, and the balance of Ti and inevitable impurities.
The method for preparing the titanium alloy structural member by using the low-cost titanium alloy wire for electric arc additive comprises the following steps:
s1, preparing a wire material with the diameter of 1.0mm by adopting a titanium alloy prefabricated wire through smelting, forging, drawing and other modes;
s2, adopting Ti-6Al-4V scrap, smelting the scrap into cast ingots through a vacuum consumable electrode furnace or a cold bed furnace, and further preparing wires with the diameter of 1.0mm through ways of cogging, forging change, drawing and the like;
s3, mixing the titanium alloy prefabricated wire material and the Ti-6Al-4V scrap wire material in a side-by-side bundling or winding mode to prepare a mixed wire;
s4, manufacturing the titanium alloy structural part by the mixed wire by adopting an electric arc additive method; the method comprises the following steps: the method comprises the steps of taking a pure titanium plate or a Ti-6Al-4V alloy plate as a substrate, stacking by a manual or automatic argon tungsten-arc welding method, firstly stacking a transition layer with the thickness of 10mm, then stacking layer by layer until the target size of a titanium alloy structural member is reached, wherein the voltage is 14V and the current is 110A in the stacking process, protecting by adopting argon gas with the flow of 8L/min, and machining to remove the substrate and the transition layer after stacking is completed.
And S5, eliminating residual stress in the titanium alloy structural component through vacuum annealing in the manufacturing process or after the titanium alloy structural component is manufactured. In this example, the temperature of the vacuum annealing was 800 ℃ and the annealing time was 1 hour.
Example 3: a low-cost titanium alloy wire for electric arc additive is prepared from a titanium alloy prefabricated wire and Ti-6Al-4V residual materials, and comprises the following components in percentage by mass: 6.0% of Al, 3.2% of V, 0.7% of Mn, 1.3% of Sn, and the balance of Ti and inevitable impurities. The titanium alloy prefabricated wire comprises the following components in percentage by mass: 6.0% of Al, 3.0% of Mn, 6.0% of Sn, and the balance of Ti and inevitable impurities.
The method for preparing the titanium alloy structural member by using the low-cost titanium alloy wire for electric arc additive comprises the following steps:
s1, preparing a wire material with the diameter of 1.0mm by adopting a titanium alloy prefabricated wire through smelting, forging, drawing and other modes;
s2, adopting Ti-6Al-4V scrap, smelting the scrap into cast ingots through a vacuum consumable electrode furnace or a cold bed furnace, and further preparing wires with the diameter of 2.0mm through ways of cogging, forging change, drawing and the like;
s3, mixing the titanium alloy prefabricated wire material and the Ti-6Al-4V scrap wire material in a side-by-side bundling or winding mode to prepare a mixed wire;
s4, manufacturing the titanium alloy structural part by the mixed wire by adopting an electric arc additive method; the method comprises the following steps: the method comprises the steps of taking a pure titanium plate or a Ti-6Al-4V alloy plate as a substrate, stacking by a manual or automatic argon tungsten-arc welding method, firstly stacking a transition layer with the thickness of 10mm, then stacking layer by layer until the target size of a titanium alloy structural member is reached, wherein the voltage is 15V and the current is 140A in the stacking process, protecting by adopting argon gas with the flow of 20L/min, and machining to remove the substrate and the transition layer after stacking is completed.
And S5, eliminating residual stress in the titanium alloy structural component through vacuum annealing in the manufacturing process or after the titanium alloy structural component is manufactured. In this example, the temperature of the vacuum annealing was 600 ℃ and the annealing time was 1 hour.
Example 4: a low-cost titanium alloy wire for electric arc additive is prepared from a titanium alloy prefabricated wire and Ti-6Al-4V residual materials, and comprises the following components in percentage by mass: 6.0% of Al, 0.4% of V, 2.7% of Mn, 5.4% of Sn, and the balance of Ti and inevitable impurities. The titanium alloy prefabricated wire comprises the following components in percentage by mass: 5.0% of Al, 3.0% of Mn, 6.0% of Sn, and the balance of Ti and inevitable impurities.
The method for preparing the titanium alloy structural member by using the low-cost titanium alloy wire for electric arc additive comprises the following steps:
s1, preparing a wire material with the diameter of 3.0mm by adopting a titanium alloy prefabricated wire through smelting, forging, drawing and other modes;
s2, adopting Ti-6Al-4V scrap, smelting the scrap into cast ingots through a vacuum consumable electrode furnace or a cold bed furnace, and further preparing wires with the diameter of 1.0mm through ways of cogging, forging change, drawing and the like;
s3, mixing the titanium alloy prefabricated wire material and the Ti-6Al-4V scrap wire material in a side-by-side bundling or winding mode to prepare a mixed wire;
s4, manufacturing the titanium alloy structural part by the mixed wire by adopting an electric arc additive method; the method comprises the following steps: the method comprises the steps of taking a pure titanium plate or a Ti-6Al-4V alloy plate as a substrate, stacking by a manual or automatic argon tungsten-arc welding method, firstly stacking a transition layer with the thickness of 10mm, then stacking layer by layer until the target size of a titanium alloy structural member is reached, wherein the voltage is 10V and the current is 180A in the stacking process, protecting by adopting argon gas with the flow of 10L/min, and machining to remove the substrate and the transition layer after stacking is completed.
And S5, eliminating residual stress in the titanium alloy structural component through vacuum annealing in the manufacturing process or after the titanium alloy structural component is manufactured. In this example, the temperature of the vacuum annealing was 800 ℃ and the annealing time was 2 hours.
Example 5: a low-cost titanium alloy wire for electric arc additive is prepared from a titanium alloy prefabricated wire and Ti-6Al-4V residual materials, and comprises the following components in percentage by mass: 5.9% of Al, 3.6% of V, 0.3% of Mn, and the balance of Ti and inevitable impurities. The titanium alloy prefabricated wire comprises the following components in percentage by mass: 6.0% of Al, 3.0% of Mn, and the balance of Ti and inevitable impurities.
The method for preparing the titanium alloy structural member by using the low-cost titanium alloy wire for electric arc additive comprises the following steps:
s1, preparing a wire material with the diameter of 1.0mm by adopting a titanium alloy prefabricated wire through smelting, forging, drawing and other modes;
s2, adopting Ti-6Al-4V scrap, smelting the scrap into cast ingots through a vacuum consumable electrode furnace or a cold bed furnace, and further preparing wires with the diameter of 3.0mm through ways of cogging, forging change, drawing and the like;
s3, mixing the titanium alloy prefabricated wire material and the Ti-6Al-4V scrap wire material in a side-by-side bundling or winding mode to prepare a mixed wire;
s4, manufacturing the titanium alloy structural part by the mixed wire by adopting an electric arc additive method; the method comprises the following steps: the method comprises the steps of taking a pure titanium plate or a Ti-6Al-4V alloy plate as a substrate, stacking by a manual or automatic argon tungsten-arc welding method, firstly stacking a transition layer with the thickness of 10mm, then stacking layer by layer until the target size of a titanium alloy structural member is reached, wherein the voltage is 12V and the current is 120A in the stacking process, protecting by adopting argon gas with the flow of 10L/min, and machining to remove the substrate and the transition layer after stacking is completed.
And S5, eliminating residual stress in the titanium alloy structural component through vacuum annealing in the manufacturing process or after the titanium alloy structural component is manufactured. In this example, the temperature of the vacuum annealing was 600 ℃ and the annealing time was 1 hour.
Further, the applicant conducted performance tests on the titanium alloy structural members manufactured in examples 1 to 5, and the results thereof are shown in table 1.
TABLE 1
As can be seen from table 1, the properties achieved for the titanium alloy structural member are as follows: rm≥800MP、RP0.2≥700MP、A≥10％、KIC≥100MPa·m1/2. It can be seen that the titanium alloy prepared by the invention has both higher plasticity and good toughness, especially fracture toughness K, under the condition that the yield strength is higher than 700MPaICUp to 100MPa m1/2The method is equivalent to or higher than the deformed titanium alloy forging with the same strength, and is very suitable for large-scale bearing structural parts.
In conclusion, the invention utilizes Ti-6Al-4V residual materials in the titanium alloy processing process, and can greatly reduce the cost. In addition, the prefabricated wire adopts low-cost additive elements such as Al, Mn, Sn and the like which are low-cost alloy elements, the cost of the Al, Mn and Sn elements is greatly lower than that of pure titanium, the V, Mo, Nb and other precious elements are not contained, and the cost is greatly reduced from the design cost. The titanium alloy has a simple structure, can ensure the comprehensive properties of strength, plasticity, toughness and the like, has high tolerance of impurity elements, and is particularly suitable for electric arc material increase and residual material recovery under the argon protective atmosphere.
Claims (6)
1. A low-cost titanium alloy wire for electric arc additive is characterized in that: the titanium alloy wire is prepared from a titanium alloy prefabricated wire and a Ti-6Al-4V residual material, and comprises the following components in percentage by mass: 5.5 to 7.0 percent of All, 0.4 to 3.6 percent of V, 0.3 to 2.5 percent of Mn, 0 to 5.4 percent of Sn, and the balance of Ti and inevitable impurities.
2. The low-cost titanium alloy wire for arc additive according to claim 1, wherein: the titanium alloy prefabricated wire comprises the following components in percentage by mass: 5.0 to 8.0 percent of Al, 2.0 to 5.0 percent of Mn, 0 to 6.0 percent of Sn, and the balance of Ti and inevitable impurities.
3. The method of manufacturing a structural member from low-cost titanium alloy wire for arc additive according to claim 1 or 2, wherein: the method comprises the following steps:
s1, preparing the titanium alloy prefabricated wire into a wire material with the diameter of 1.0mm-3.0 mm;
s2, preparing Ti-6Al-4V residual materials into wire materials with the diameter of 1.0mm-3.0 mm;
s3, mixing the titanium alloy prefabricated wire material and the Ti-6Al-4V scrap wire material in a side-by-side bundling or winding mode to prepare a mixed wire;
s4, manufacturing the titanium alloy structural part by the mixed wire by adopting an electric arc additive method;
and S5, eliminating residual stress in the titanium alloy structural component through vacuum annealing in the manufacturing process or after the titanium alloy structural component is manufactured.
4. The method of manufacturing a structural member from low-cost titanium alloy wire for arc additive manufacturing according to claim 3, wherein: in step S3, the method for manufacturing a titanium alloy structural member by using an arc additive manufacturing method includes the specific steps of: the method comprises the steps of taking a pure titanium plate or a Ti-6Al-4V alloy plate as a base plate, stacking by a manual or automatic argon tungsten-arc welding method, firstly stacking a transition layer with the thickness of 10mm, then stacking layer by layer until the target size of a titanium alloy structural member is reached, wherein the voltage is 10-15V and the current is 60-180A in the stacking process, protecting by argon gas with the flow of the argon gas being 8-20L/min, and machining to remove the base plate and the transition layer after stacking is completed.
5. The method of manufacturing a structural member from low-cost titanium alloy wire for arc additive manufacturing according to claim 3, wherein: in step S4, the temperature of the vacuum annealing is 500-800 ℃, and the annealing time is 1 h.
6. The method of manufacturing a structural member from low-cost titanium alloy wire for arc additive manufacturing according to claim 3, wherein: the properties achieved for the titanium alloy structural member are as follows: rm≥800MP、RP0.2≥700MP、A≥10％、KIC≥100MPa·m1/2。
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| CN1743482A (en) * | 2004-09-02 | 2006-03-08 | 盖恩斯马特有限公司 | High strength low cost titanium and method for making same |
| US20210040585A1 (en) * | 2018-02-27 | 2021-02-11 | Oxmet Technologies Limited | A bio-compatible titanium alloy optimised for additive manufacturing |
| CN113403501A (en) * | 2021-06-18 | 2021-09-17 | 中国船舶重工集团公司第七二五研究所 | Ultrahigh-toughness titanium alloy for electric arc additive and manufacturing method of titanium alloy structural member |
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