Novel electron beam additive manufacturing method for high-temperature and high-strength titanium-based composite material
By adding titanium-aluminum alloy to high-strength titanium alloy and using electron beam selection melting additive manufacturing method, the problem of high-strength titanium alloy decreases at high temperatures is solved, the high-temperature performance of the material is improved, and its application range is expanded.
Patent Information
- Application Number
- CN202411239293.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2024-12-10
AI Technical Summary
The strength of high-strength titanium alloys has dropped sharply in high temperature environments, limiting their application range on aircraft hot-end components.
Add an appropriate proportion of titanium-aluminum alloy to high-strength titanium alloy, use electron beam selection melting additive manufacturing method to prepare a new high-temperature high-strength titanium-based composite material powder, and preheat the substrate to 700-850℃, adjust the forming and melting process parameters , a high-strength titanium-based composite material with improved high temperature performance is formed.
It significantly improves the high-temperature performance of titanium-based composite materials, making the room temperature tensile strength reach 1320MPa, and the high-temperature tensile strength reach 679MPa at 600℃, expanding the application range of the materials.
Smart Images
Figure CN119101818A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of metal materials, and in particular to an electron beam additive manufacturing method for a novel high-temperature and high-strength titanium-based composite material. Background Art
[0002] In order to improve the overall performance, there is an urgent need to reduce the weight of the new generation of aircraft, requiring them to have better overall performance, that is, the improvement and matching of static strength, fracture, fatigue and other performance. Therefore, the design unit proposed the use of high-strength titanium alloy to reduce the weight of the structure. The use of additive manufacturing can achieve near-net forming of parts without molds, which is a new method for developing high-strength titanium alloy parts. However, the strength of high-strength titanium alloy materials decreases sharply with the increase of operating temperature, resulting in limited application in high-temperature components. Summary of the invention
[0003] (1) Technical issues to be solved
[0004] The present application provides a novel electron beam additive manufacturing method for high-temperature and high-strength titanium-based composite materials to solve the problems in the above-mentioned background technology.
[0005] (2) Technical solution
[0006] In a first aspect, the present application provides an electron beam additive manufacturing method for a high-temperature and high-strength titanium-based composite material, comprising:
[0007] A certain proportion of titanium-aluminum alloy is added to high-strength titanium alloy to form a new type of high-temperature and high-strength titanium-based composite material powder for electron beam selective melting additive manufacturing;
[0008] The novel high-temperature and high-strength titanium-based composite material powder is prepared by an electron beam selective melting additive manufacturing method.
[0009] Furthermore, the novel high-temperature and high-strength titanium-based composite material powder adopts a mixed powder of TB18 titanium alloy and titanium-aluminum alloy.
[0010] Furthermore, the electron beam selective melting additive manufacturing method includes preheating the formed substrate to 700-850° C. and keeping the temperature for 5-10 minutes.
[0011] Furthermore, the electron beam selective melting additive manufacturing method specifically includes heating the forming substrate to 730° C. and keeping the temperature for 5 minutes before forming.
[0012] Furthermore, the forming process parameters of the electron beam selective melting additive manufacturing are: electron beam current is 25-30 mA, scanning rate is 13000-15000 mm / s, scanning spacing is 1-1.5 mm, and powder single layer thickness is 0.07 mm.
[0013] Furthermore, the forming process parameters of the electron beam selective melting additive manufacturing are specifically: electron beam current is 30mA, scanning rate is 13000mm / s, scanning spacing is 1.3mm, and powder single layer thickness is 0.07mm.
[0014] Furthermore, the melting process parameters of the electron beam selective melting additive manufacturing are: electron beam current is 10-15 mA, and scanning speed is 1800-2500 mm / s.
[0015] Furthermore, the melting process parameters of the electron beam selective melting additive manufacturing are specifically: the electron beam current is 12 mA and the scanning speed is 2000 mm / s.
[0016] In a second aspect, the present application provides a novel high-temperature and high-strength titanium-based composite material, which is prepared by the electron beam additive manufacturing method of the novel high-temperature and high-strength titanium-based composite material as described above.
[0017] Furthermore, the room temperature tensile strength of the novel high-temperature and high-strength titanium-based composite material is 1320 MPa, and the high temperature tensile strength at 600°C is 679 MPa.
[0018] (3) Beneficial effects
[0019] The above technical solution of the present application has the following advantages:
[0020] The electron beam additive manufacturing method for a new high-temperature and high-strength titanium-based composite material provided in the present application forms a new high-temperature and high-strength titanium-based composite material powder specially used for electron beam selective additive manufacturing by adding a suitable proportion of titanium-aluminum alloy powder to high-strength titanium alloy powder. The new high-temperature and high-strength titanium-based composite material is prepared by an electron beam selective melting additive manufacturing method, which can greatly improve the high-temperature performance of the titanium-based composite material and expand the application range of the material.
[0021] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0023] Figure 1 Flow chart of the electron beam additive manufacturing method for the new high-temperature and high-strength titanium-based composite material provided in this application. DETAILED DESCRIPTION
[0024] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.
[0025] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.
[0026] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.
[0027] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. "Multiple" means "two or more".
[0028] With the rapid development of aerospace technology, the application demand for high-strength titanium alloys is extremely urgent. This material will become one of the main structural materials for lightweight and energy-saving contemporary aircraft. High-strength titanium alloys are usually metastable β-type. Compared with α+β-type titanium alloys, metastable β-type titanium alloys contain sufficient β-stabilizing elements. After solid solution treatment in the β phase region, the β phase can be retained to room temperature by rapid cooling. Therefore, this type of alloy has a high heat treatment strengthening effect, a large hardening depth, good hot and cold processing properties and excellent fracture toughness, and is an ideal candidate material for aviation aircraft components. However, with the increase of the ambient temperature of use, the strength of high-strength titanium alloys can drop sharply to 30% of room temperature. For example, the room temperature strength of TB18 alloy manufactured by electron beam selective melting additive manufacturing can reach 1200MPa. When the temperature is raised to 600℃, its tensile strength can only reach 400MPa. Therefore, this material cannot meet the use requirements of high temperature environments. The poor high-temperature performance of high-strength titanium alloys seriously limits the application range of this material.
[0029] In response to the above problems, the present application proposes an electron beam additive manufacturing method for a new type of high-temperature and high-strength titanium-based composite material. By adding a suitable proportion of titanium-aluminum alloy to a high-strength titanium alloy and adopting an additive manufacturing method for forming, a new type of titanium-based composite material is formed, and its room temperature strength can reach 1300MPa level, and the high-temperature performance of the material is improved. This provides technical support for the application of new high-temperature and high-strength titanium-based composite materials in aircraft hot end components, and greatly expands the application scope of new materials.
[0030] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.
[0031] like Figure 1 As shown, the electron beam additive manufacturing method of the novel high-temperature and high-strength titanium-based composite material provided in the embodiment of the present application specifically includes the following steps: adding a certain proportion of titanium-aluminum alloy to the high-strength titanium alloy to form a novel high-temperature and high-strength titanium-based composite material powder for electron beam selective melting additive manufacturing; preparing the novel high-temperature and high-strength titanium-based composite material powder by the electron beam selective melting additive manufacturing method.
[0032] In some embodiments, the novel high-temperature and high-strength titanium-based composite material powder is a mixed powder of TB18 titanium alloy and titanium aluminum alloy.
[0033] In some embodiments, the electron beam selective melting additive manufacturing method includes preheating the formed substrate to 700-850° C. and keeping the temperature for 5-10 minutes.
[0034] In some embodiments, the electron beam selective melting additive manufacturing method specifically includes heating the forming substrate to 730° C. and keeping the temperature for 5 minutes before forming.
[0035] In some embodiments, the forming process parameters of the electron beam selective melting additive manufacturing are: electron beam current is 25-30 mA, scanning rate is 13000-15000 mm / s, scanning spacing is 1-1.5 mm, and powder single layer thickness is 0.07 mm.
[0036] In some embodiments, the forming process parameters of the electron beam selective melting additive manufacturing are specifically: electron beam current is 30mA, scanning rate is 13000mm / s, scanning spacing is 1.3mm, and powder single layer thickness is 0.07mm.
[0037] In some embodiments, the melting process parameters of the electron beam selective melting additive manufacturing are: electron beam current is 10-15 mA, and scanning speed is 1800-2500 mm / s.
[0038] In some embodiments, the melting process parameters of the electron beam selective melting additive manufacturing are specifically: the electron beam current is 12 mA and the scanning speed is 2000 mm / s.
[0039] In application, a new type of high-temperature and high-strength titanium-based composite material powder specially used for electron beam selective melting additive manufacturing is formed by adding a suitable proportion of titanium-aluminum alloy to high-strength titanium alloy, and a high-strength titanium-based composite material with greatly improved high-temperature performance is formed. The room temperature strength of the formed material reaches 1300MPa, and the high-temperature strength at 600℃ can reach more than 670MPa.
[0040] The specific scheme is as follows: Add a suitable proportion of titanium aluminum alloy powder to high-strength titanium alloy powder to form a new high-temperature titanium-based composite material powder dedicated to electron beam selective additive manufacturing, and use the electron beam selective melting additive manufacturing method to prepare the new high-temperature titanium-based composite material. The new titanium-based composite material is prepared by the additive manufacturing method, and the forming substrate is preheated to 700-850°C and kept warm for 5-10 minutes. The forming process parameters are: preheating beam current is 25-30mA, scanning rate is 13000-15000mm / s, and scanning spacing is 1-1.5mm; melting process parameters are: electron beam current is 10-15mA, scanning speed is 1800-2500mm / s. After forming, the composition, organization and performance of the formed material are tested.
[0041] The embodiment of the present application also provides a novel high-temperature and high-strength titanium-based composite material, which is prepared by the electron beam additive manufacturing method of the novel high-temperature and high-strength titanium-based composite material as described above.
[0042] In some embodiments, the room temperature tensile strength of the novel high-temperature and high-strength titanium-based composite material is 1320 MPa, and the high temperature tensile strength at 600° C. is 679 MPa.
[0043] The following is an explanation through specific embodiments.
[0044] Example
[0045] This embodiment adopts the electron beam selective melting additive manufacturing method to prepare titanium aluminum reinforced high-strength titanium alloy matrix composite material, and the specific implementation steps are:
[0046] 1. The forming powder is a new type of powder formed by mixing high-strength titanium alloy TB18 and titanium-aluminum alloy in a certain proportion.
[0047] 2. Heat the forming substrate to 730°C and keep it at this temperature for 5 minutes before forming.
[0048] 3. The forming process parameters are: the single layer thickness of the powder is 0.7 mm, the powder is formed after it is laid, the preheating process is: the electron beam current is 30 mA, the scanning speed is 13000 mm / s, and the scanning spacing is 1.3 mm; the melting process is: the electron beam current is 12 mA, and the scanning speed is 2000 mm / s.
[0049] 4. After one layer is melted, continue to lay powder to form the next layer. The composition of the formed new alloy material is: Al: 9.78wt.%, V: 3.92wt.%, Cr: 3.39wt.%, Nb: 0.70wt.%, Mo: 3.33wt.%, Ti: the rest.
[0050] 5. The microstructure analysis and performance testing of the formed samples showed that the room temperature tensile strength of the formed new material reached 1320MPa, and the high temperature tensile strength at 600℃ reached 679MPa; the room temperature strength was increased by more than 100MPa compared with the TB18 alloy, and the high temperature strength was increased by nearly 300MPa.
[0051] The electron beam additive manufacturing method of the novel high-temperature and high-strength titanium-based composite material provided in the embodiment of the present application forms a novel high-temperature and high-strength titanium-based composite material powder for electron beam selective additive manufacturing by adding a suitable proportion of titanium-aluminum alloy powder to high-strength titanium alloy powder. The novel high-temperature and high-strength titanium-based composite material is developed by using the electron beam selective melting additive manufacturing method, so that the room temperature strength of the formed new material reaches 1300MPa, and its high temperature performance at 600°C is greatly improved, expanding the application range of the material.
[0052] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. A novel electron beam additive manufacturing method for high-temperature and high-strength titanium-based composite materials, characterized in that: include: A certain proportion of titanium-aluminum alloy is added to high-strength titanium alloy to form a new type of high-temperature and high-strength titanium-based composite material powder for electron beam selective melting additive manufacturing; The novel high-temperature and high-strength titanium-based composite material powder is prepared by an electron beam selective melting additive manufacturing method.
2. The electron beam additive manufacturing method for the novel high-temperature and high-strength titanium-based composite material according to claim 1, characterized in that: The novel high-temperature and high-strength titanium-based composite material powder is a mixed powder of TB18 titanium alloy and titanium-aluminum alloy.
3. The electron beam additive manufacturing method for the novel high-temperature and high-strength titanium-based composite material according to claim 1, characterized in that: The electron beam selective melting additive manufacturing method comprises preheating the formed substrate to 700-850° C. and keeping the temperature for 5-10 minutes.
4. The electron beam additive manufacturing method for the novel high-temperature and high-strength titanium-based composite material according to claim 3 is characterized in that: The electron beam selective melting additive manufacturing method specifically includes heating the forming substrate to 730° C., keeping the temperature for 5 minutes, and then forming.
5. The electron beam additive manufacturing method for the novel high-temperature and high-strength titanium-based composite material according to claim 1, characterized in that: The forming process parameters of the electron beam selective melting additive manufacturing are: electron beam current of 25-30 mA, scanning rate of 13000-15000 mm / s, scanning spacing of 1-1.5 mm, and powder single layer thickness of 0.07 mm.
6. The electron beam additive manufacturing method for the novel high-temperature and high-strength titanium-based composite material according to claim 5, characterized in that: The forming process parameters of the electron beam selective melting additive manufacturing are specifically: electron beam current is 30 mA, scanning rate is 13000 mm / s, scanning spacing is 1.3 mm, and powder single layer thickness is 0.07 mm.
7. The electron beam additive manufacturing method for the novel high-temperature and high-strength titanium-based composite material according to claim 1, characterized in that: The melting process parameters of the electron beam selective melting additive manufacturing are: electron beam current is 10-15 mA, and scanning speed is 1800-2500 mm / s.
8. The electron beam additive manufacturing method for the novel high-temperature and high-strength titanium-based composite material according to claim 7, characterized in that: The specific melting process parameters of the electron beam selective melting additive manufacturing are: the electron beam current is 12 mA and the scanning speed is 2000 mm / s.
9. A new type of high-temperature and high-strength titanium-based composite material, characterized in that: The novel high-temperature and high-strength titanium-based composite material is prepared by an electron beam additive manufacturing method based on any one of claims 1 to 8.
10. The novel high-temperature and high-strength titanium-based composite material according to claim 9, characterized in that: The room temperature tensile strength of the novel high-temperature and high-strength titanium-based composite material is 1320 MPa, and the high-temperature tensile strength at 600° C. is 679 MPa.