CN113667876A - Titanium-molybdenum-niobium alloy and preparation method thereof - Google Patents
Titanium-molybdenum-niobium alloy and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a novel titanium-molybdenum-niobium alloy, which comprises the following components: 20-45 wt% of molybdenum, 5-30 wt% of niobium and the balance of titanium. The titanium-molybdenum-niobium alloy has the structure of beta-Ti, the compressive strength of 1850-2000MPa, the plastic deformation of 10-15 percent and the compressive elastic modulus of 22-32 GPa. The preparation method of the titanium-molybdenum-niobium alloy uses titanium hydride powder, molybdenum powder and niobium powder as raw materials and comprises the steps of mixing, cold isostatic pressing, vacuum sintering, heat treatment and the like. The invention adds niobium element, which can keep higher strength and improve plasticity, and lower neutron absorption. According to the invention, titanium hydride powder is used, and the microstructure of all beta-Ti phases is obtained through solid solution and quenching treatment, so that no characteristic diffraction peak appears under a neutron diffraction experiment. Titanium powder is replaced by titanium hydride powder, so that the cost is reduced. And forging to obtain the titanium-molybdenum-niobium alloy with high strength and plasticity. The titanium-molybdenum-niobium alloy can be applied to the fields related to neutron diffraction and can also be applied to the field of medical treatment.
Description
Technical Field
The invention belongs to the technical field of powder metallurgy, relates to a titanium molybdenum niobium alloy neutron transparent material used in the field of neutron diffraction, and particularly relates to a method for preparing the titanium molybdenum niobium alloy through a powder metallurgy process, so as to obtain a titanium molybdenum niobium alloy without a characteristic diffraction peak in a neutron diffraction experiment; in addition, the material can also be used as a biological implant material due to the characteristic of low elastic modulus.
Background
The high pressure as an extreme condition can cause a plurality of physicochemical phenomena which can not be generated under the normal pressure condition, which is an important source for the research and preparation of new materials and can develop new materials, explore new phenomena and develop new theories. Neutron diffraction generally refers to bragg diffraction that occurs when neutrons (thermal neutrons) having a de broglie wavelength of about 1 angstrom pass through crystalline materials, and has greater penetration and magnetic moment than X-ray diffraction. Currently, the neutron diffraction method is one of the important means for studying the structure of a substance.
Neutron diffraction experiments under high pressure conditions push the research on material structures, behaviors and the like to a new height, and are powerful means in the structural and kinetic research of complex compounds. The high-pressure in-situ neutron diffraction experiment can provide a unique material characterization means for researching structural phase change, a high-pressure state equation, strength, elastic modulus, texture and the like. Currently, the development of high-pressure neutron diffraction technology has led to many remarkable results in material science in the research of crystal structure, lattice dynamics, texture and the like.
A material that does not scatter neutrons is called a neutron transparent material, i.e. a material that is completely transparent to the neutron beam. Only the scattered coherent part contributes to diffraction, and since there are also non-coherent parts of the scattering, the neutron transparent material is not completely transparent to neutrons, there will be some uniform absorption background, but no diffraction pattern will appear.
At present, the neutron transparent material widely used in the scientific community is a Ti-Zr alloy material proposed in 1956 in the United states, and research shows that the Ti-Zr alloy used as a sealing pad for high-pressure neutron diffraction has too low strength to support high pressure, has very thin thickness under high pressure, can contain a small number of samples, brings difficulty to neutron diffraction, has strong Ti-Zr alloy adhesion force, is easy to adhere to a diamond table surface, is extremely difficult to clean, and even causes the damage of a diamond anvil cell. The Chinese patent ZL201510998659.5 designs a novel molybdenum-titanium alloy which has higher strength than Ti-Zr alloy, can improve the pressure of a high-pressure cavity and increase the number of high-pressure experimental samples; and the adhesion to the diamond is very low, and the diamond anvil cell is easy to clean after the high-pressure experiment, so that the service life of the diamond anvil cell can be prolonged, and the cost of the high-pressure experiment is reduced. However, the pure molybdenum-titanium alloy has a slightly large neutron absorption and low plasticity, and the application range of the alloy in the high-pressure neutron diffraction field is limited.
To sum up, need now to research and develop a novel neutron transparent material, have outstanding comprehensive mechanical properties and neutron diffraction performance concurrently, not only can be applied to the sample chamber sealing gasket, also can be applied to whole high pressure device.
Disclosure of Invention
In order to overcome the defects of the conventional neutron transparent material, the invention provides a novel titanium molybdenum niobium alloy neutron transparent material and a preparation method thereof.
In the invention, firstly, an element with a neutron coherent scattering length value of a negative value of an atom is found and matched with an element with a proper coherent scattering length value of a positive value, so that the neutron coherent scattering length value and the element are mutually counteracted. And the elements Ti, Mo and Nb are preferable in view of small absorption of neutrons by the elements, strength and plasticity of the alloy, and uniformity of the structure.
Based on the above principle, the invention firstly provides a novel titanium-molybdenum-niobium alloy, which comprises the following components: 20-45 wt% of molybdenum, 5-30 wt% of niobium and the balance of titanium; the titanium-molybdenum-niobium alloy has the structure of beta-Ti, the compressive strength of 1850-2000MPa, the plastic deformation of 10-15%, no characteristic diffraction peak in neutron diffraction experiment, and is applied to the related field of neutron diffraction.
Further, the preferred titanium molybdenum niobium alloy comprises the following components: 25-35 wt% of molybdenum, 15-25 wt% of niobium and the balance of titanium.
Furthermore, the compressive elastic modulus of the titanium molybdenum niobium alloy is 22-32GPa, is equivalent to that of human bones, and can be used as a biological implant material to be applied to the medical field.
The invention also relates to a preparation method of the titanium-molybdenum-niobium alloy, which comprises the following steps:
(1) the titanium molybdenum niobium alloy composition as described above, wherein the mass of Ti is converted to TiH2Of (2) by TiH2Respectively weighing the powder, Mo powder and Nb powder as raw materials, and uniformly mixing to obtain mixed powder;
(2) carrying out cold isostatic pressing on the mixed powder obtained in the step (1) to obtain a green body;
(3) sintering the green body obtained in the step (2) in a vacuum furnace to obtain a sintered titanium-molybdenum-niobium alloy;
(4) and (4) carrying out solid solution and quenching treatment on the sintered titanium-molybdenum-niobium alloy obtained in the step (3) to obtain a titanium-molybdenum-niobium alloy finished product.
Further, in the step (3), the sintering temperature is 1400 ℃ and 1600 ℃, the sintering time is 1-3h, the vacuum degree is less than or equal to 1.33 multiplied by 10-1Pa。
Further, in the step (4), the solid solution temperature is 1000-1200 ℃, the temperature is kept for 1h, and then oil quenching and cooling are carried out.
Further, forging the titanium-molybdenum-niobium alloy between the step (3) and the step (4), wherein the forging temperature is 1250-1350 ℃, the compressive strength of the titanium-molybdenum-niobium alloy after forging reaches 2000-2200MPa, and the plastic deformation is kept at 10-15%.
Compared with the prior art, the invention has the advantages that:
(1) the titanium-molybdenum-niobium alloy of the invention adopts molybdenum and niobium as alloy elements, the plasticity is obviously improved while the higher strength is kept, the microstructure is a single beta-Ti phase, the design requirement of neutron transparent materials is met, no characteristic diffraction peak appears in neutron diffraction experiments, and the neutron absorption of niobium is lower than that of molybdenum.
(2) Compared with the prior art, the titanium-molybdenum-niobium alloy has the elastic modulus equivalent to that of human bones and is suitable for being used as a biological implantation material.
(3) Compared with the prior art, the preparation method of the titanium-molybdenum-niobium alloy adopts titanium hydride powder to replace titanium powder, reduces the oxygen content, is easier to eliminate alpha-Ti, ensures the microstructure of all beta-Ti phases to be obtained through solid solution and quenching treatment, and reduces the cost.
(4) And forging to obtain the titanium-molybdenum-niobium alloy with high strength and plasticity.
Drawings
FIG. 1 is a microstructure of a neutron transparent material of a prior art titanium molybdenum alloy;
FIG. 2 is a neutron diffraction pattern of a prior art titanium molybdenum alloy neutron transparent material;
FIG. 3 is a microstructure of a neutron transparent material of the titanium-molybdenum-niobium alloy of the present invention;
FIG. 4 is a neutron diffraction diagram of the neutron transparent material of the titanium-molybdenum-niobium alloy of the invention.
Detailed Description
The neutron scattering lengths of Ti, Mo and Nb elements are-3.438, 6.715 and 7.054 respectively, and the neutron transparent material with zero diffraction can be obtained through the weighted sum of the contents, so that the interference of diffraction signals on useful signals of neutron diffraction experiments is avoided. The neutron absorption cross sections of Ti, Mo and Nb elements are respectively 6.09, 2.55 and 1.15, the Nb element has small neutron absorption, can reduce the neutron absorption, is beneficial to direct transmission of neutrons, and obtains stronger signals during neutron diffraction.
Compared with the titanium molybdenum niobium alloy neutron material disclosed by Chinese patent ZL201510998659.5, the titanium molybdenum niobium alloy of the invention is newly added with niobium element on the basis of the titanium molybdenum neutron transparent material. The addition of the niobium element can also lead to the refinement of beta-Ti alloy grains and improve the alloy performance; the compressive strength of the titanium molybdenum niobium alloy neutron material is 1850-2000MPa, and is slightly reduced compared with the titanium molybdenum alloy neutron material, but the addition of the niobium element greatly improves the plasticity of the titanium molybdenum niobium alloy from 3-5% of the titanium molybdenum alloy to 10-15% of plastic deformation; the addition of the niobium element can reduce the elastic modulus of the alloy, the compressive elastic modulus of the titanium molybdenum alloy neutron material is 35-50GPa, and the compressive elastic modulus of the titanium molybdenum niobium alloy neutron material is only 22-32GPa, so that the elastic modulus of the titanium molybdenum niobium alloy neutron material is equivalent to that of a human bone, and meanwhile, the niobium element is non-toxic and can be applied to the medical field as a biological implant material.
According to the preparation method of the titanium-molybdenum-niobium alloy, titanium powder is replaced by titanium hydride powder. When titanium hydride powder is used, hydrogen is decomposed and removed during vacuum heating, and diffusion-controlled sintering and chemical homogenization of the heterogeneous powder system are activated. Hydrogen also cleans the surface of the titanium particles, thereby greatly reducing the content of impurities (such as O, Cl and C), particularly oxygen, which stabilizes the alpha-Ti element, thereby converting all alpha-Ti into beta-Ti, which is beneficial for the alloy to become a beta-Ti single-phase alloy. However, a small amount of α -Ti phase remains in the microstructure of the titanium molybdenum alloy of the prior art, such as the fringe area in fig. 1, which still has a characteristic diffraction peak on the neutron diffraction pattern, although its intensity is low, as shown in fig. 2. Meanwhile, the preparation method of the invention also adds solid solution and quenching treatment, thereby further ensuring that the microstructure of the titanium-molybdenum-niobium alloy is totally beta-Ti phase (as shown in figure 3) and is a single BCC crystal structure solid solution, completely avoiding the occurrence of neutron diffraction characteristic peak and only remaining diffraction background (as shown in figure 4).
Example 1
(1) Mix TiH2Weighing and batching the powder, Mo powder and Nb powder according to the mass percentages of 52%, 45% and 5%, and placing the mixture in a ball mill for ball milling and mixing for 3 hours to obtain mixed powder;
(2) filling the mixed powder obtained in the step (1) into a rubber sheath, putting the rubber sheath into a cold isostatic press, and compacting under the pressure of 200MPa to obtain a green body;
(3) sintering the green body obtained in the step (2) in a vacuum sintering furnace, wherein the vacuum degree is 0.1Pa, the sintering temperature is 1400 ℃, and the heat preservation time is 3 hours to obtain a sintered titanium-molybdenum-niobium alloy;
(4) and (3) carrying out solution treatment on the titanium-molybdenum-niobium alloy obtained in the step (3) at 1000 ℃, preserving heat for 1h, then carrying out oil quenching and cooling to obtain the final titanium-molybdenum-niobium alloy, wherein no characteristic diffraction peak appears in a neutron diffraction experiment, the compression strength is 1800MPa, the plastic deformation is 10%, and the compression elastic modulus is 30GPa, so that the titanium-molybdenum-niobium alloy can be used as a neutron transparent material in the related fields of neutron diffraction, and can also be used as a biological implantation material in the medical field.
Example 2
(1) Mix TiH2Weighing and batching the powder, Mo powder and Nb powder according to the mass percentages of 52%, 40% and 10%, and placing the mixture in a ball mill for ball milling and mixing for 3 hours to obtain mixed powder;
(2) filling the mixed powder obtained in the step (1) into a rubber sheath, putting the rubber sheath into a cold isostatic press, and compacting under the pressure of 200MPa to obtain a green body;
(3) sintering the green body obtained in the step (2) in a vacuum sintering furnace, wherein the vacuum degree is 0.1Pa, the sintering temperature is 1450 ℃, and the heat preservation time is 2 hours to obtain sintered titanium-molybdenum-niobium alloy;
(4) and (3) carrying out solution treatment on the titanium-molybdenum-niobium alloy obtained in the step (3) at 1050 ℃, preserving heat for 1h, then carrying out oil quenching and cooling to obtain the final titanium-molybdenum-niobium alloy, wherein no characteristic diffraction peak appears in a neutron diffraction experiment, the compression strength is 1850MPa, the plastic deformation is 12%, and the compression elastic modulus is 32GPa, so that the titanium-molybdenum-niobium alloy can be used as a neutron transparent material in the related fields of neutron diffraction, and can also be used as a biological implantation material in the medical field.
Example 3
(1) Mix TiH2Weighing and batching the powder, Mo powder and Nb powder according to the mass percentages of 52%, 35% and 15%, and placing the mixture in a ball mill for ball milling and mixing for 3 hours to obtain mixed powder;
(2) filling the mixed powder obtained in the step (1) into a rubber sheath, putting the rubber sheath into a cold isostatic press, and compacting under the pressure of 200MPa to obtain a green body;
(3) sintering the green body obtained in the step (2) in a vacuum sintering furnace, wherein the vacuum degree is 0.1Pa, the sintering temperature is 1500 ℃, and the heat preservation time is 2 hours to obtain a sintered titanium-molybdenum-niobium alloy;
(4) and (3) carrying out solution treatment on the titanium-molybdenum-niobium alloy obtained in the step (3) at 1100 ℃, preserving heat for 1h, then carrying out oil quenching and cooling to obtain the final titanium-molybdenum-niobium alloy, wherein no characteristic diffraction peak appears in a neutron diffraction experiment, the compression strength is 1900MPa, the plastic deformation is 15%, and the compression elastic modulus is 28GPa, so that the titanium-molybdenum-niobium alloy can be used as a neutron transparent material in the related fields of neutron diffraction, and can also be used as a biological implantation material in the medical field.
Example 4
(1) Mix TiH2Weighing and batching the powder, Mo powder and Nb powder according to the mass percentages of 52%, 30% and 20%, and placing the mixture in a ball mill for ball milling and mixing for 3 hours to obtain mixed powder;
(2) filling the mixed powder obtained in the step (1) into a rubber sheath, putting the rubber sheath into a cold isostatic press, and compacting under the pressure of 200MPa to obtain a green body;
(3) sintering the green body obtained in the step (2) in a vacuum sintering furnace, wherein the vacuum degree is 0.1Pa, the sintering temperature is 1550 ℃, and the heat preservation time is 1.5h, so as to obtain a sintered titanium-molybdenum-niobium alloy;
(4) and (3) carrying out solution treatment on the titanium-molybdenum-niobium alloy obtained in the step (3) at 1150 ℃, preserving heat for 1h, then carrying out oil quenching and cooling to obtain the final titanium-molybdenum-niobium alloy, wherein no characteristic diffraction peak appears in a neutron diffraction experiment, the compression strength is 2000MPa, the plastic deformation is 13%, and the compression elastic modulus is 25GPa, so that the titanium-molybdenum-niobium alloy can be used as a neutron transparent material in the related fields of neutron diffraction, and can also be used as a biological implantation material in the medical field.
Example 5
(1) Mix TiH2Weighing and batching the powder, Mo powder and Nb powder according to the mass percentages of 52%, 25% and 25%, and placing the weighed materials in a ball mill for ball milling and mixing for 3 hours to obtain mixed powder;
(2) filling the mixed powder obtained in the step (1) into a rubber sheath, putting the rubber sheath into a cold isostatic press, and compacting under the pressure of 200MPa to obtain a green body;
(3) sintering the green body obtained in the step (2) in a vacuum sintering furnace, wherein the vacuum degree is 0.1Pa, the sintering temperature is 1600 ℃, and the heat preservation time is 1h to obtain a sintered titanium-molybdenum-niobium alloy;
(4) and (3) carrying out solution treatment on the titanium-molybdenum-niobium alloy obtained in the step (3) at 1200 ℃, preserving heat for 1h, then carrying out oil quenching and cooling to obtain the final titanium-molybdenum-niobium alloy, wherein no characteristic diffraction peak appears in a neutron diffraction experiment, the compression strength is 1900MPa, the plastic deformation is 14%, and the compression elastic modulus is 26GPa, so that the titanium-molybdenum-niobium alloy can be used as a neutron transparent material in the related fields of neutron diffraction, and can also be used as a biological implantation material in the medical field.
Example 6
(1) Mix TiH2Weighing and batching the powder, Mo powder and Nb powder according to the mass percentages of 52%, 20% and 30%, and placing the mixture in a ball mill for ball milling and mixing for 3 hours to obtain mixed powder;
(2) filling the mixed powder obtained in the step (1) into a rubber sheath, putting the rubber sheath into a cold isostatic press, and compacting under the pressure of 200MPa to obtain a green body;
(3) sintering the green body obtained in the step (2) in a vacuum sintering furnace, wherein the vacuum degree is 0.1Pa, the sintering temperature is 1600 ℃, and the heat preservation time is 1h to obtain a sintered titanium-molybdenum-niobium alloy;
(4) and (3) carrying out solution treatment on the titanium-molybdenum-niobium alloy obtained in the step (3) at 1200 ℃, preserving heat for 1h, then carrying out oil quenching and cooling to obtain the final titanium-molybdenum-niobium alloy, wherein no characteristic diffraction peak appears in a neutron diffraction experiment, the compression strength is 1850MPa, the plastic deformation is 14%, and the compression elastic modulus is 22GPa, so that the titanium-molybdenum-niobium alloy can be used as a neutron transparent material in the related fields of neutron diffraction, and can also be used as a biological implantation material in the medical field.
Example 7
(1) Mix TiH2Weighing and batching the powder, Mo powder and Nb powder according to the mass percentages of 52%, 25% and 25%, and placing the weighed materials in a ball mill for ball milling and mixing for 3 hours to obtain mixed powder;
(2) filling the mixed powder obtained in the step (1) into a rubber sheath, putting the rubber sheath into a cold isostatic press, and compacting under the pressure of 200MPa to obtain a green body;
(3) sintering the green body obtained in the step (2) in a vacuum sintering furnace, wherein the vacuum degree is 0.1Pa, the sintering temperature is 1400 ℃, and the heat preservation time is 2 hours to obtain a sintered titanium-molybdenum-niobium alloy;
(4) forging the sintered titanium-molybdenum-niobium alloy in the step (3), wherein the forging temperature is 1250 ℃;
(5) and (3) carrying out solution treatment on the titanium-molybdenum-niobium alloy obtained in the step (3) at 1100 ℃, preserving heat for 1h, then carrying out oil quenching and cooling to obtain the final titanium-molybdenum-niobium alloy, wherein no characteristic diffraction peak appears in a neutron diffraction experiment, the compression strength is 2000MPa, the plastic deformation is 13%, and the compression elastic modulus is 26GPa, so that the titanium-molybdenum-niobium alloy can be used as a neutron transparent material in the related fields of neutron diffraction, and can also be used as a biological implantation material in the medical field.
Example 8
(1) Mix TiH2Weighing and batching the powder, Mo powder and Nb powder according to the mass percentages of 52%, 35% and 15%, and placing the mixture in a ball mill for ball milling and mixing for 3 hours to obtain mixed powder;
(2) filling the mixed powder obtained in the step (1) into a rubber sheath, putting the rubber sheath into a cold isostatic press, and compacting under the pressure of 200MPa to obtain a green body;
(3) sintering the green body obtained in the step (2) in a vacuum sintering furnace, wherein the vacuum degree is 0.1Pa, the sintering temperature is 1400 ℃, and the heat preservation time is 2 hours to obtain a sintered titanium-molybdenum-niobium alloy;
(4) forging the sintered titanium-molybdenum-niobium alloy obtained in the step (3), wherein the forging temperature is 1350 ℃;
(5) and (3) carrying out solution treatment on the titanium-molybdenum-niobium alloy obtained in the step (4) at 1100 ℃, preserving heat for 1h, then carrying out oil quenching and cooling to obtain the final titanium-molybdenum-niobium alloy, wherein no characteristic diffraction peak appears in a neutron diffraction experiment, the compression strength is 2200MPa, the plastic deformation is 15%, and the compression elastic modulus is 25GPa, so that the titanium-molybdenum-niobium alloy can be used as a neutron transparent material in the related fields of neutron diffraction, and can also be used as a biological implantation material in the medical field.
Example 9
(1) Mix TiH2Weighing and batching the powder, Mo powder and Nb powder according to the mass percentages of 52%, 30% and 20%, and placing the mixture in a ball mill for ball milling and mixing for 3 hours to obtain mixed powder;
(2) filling the mixed powder obtained in the step (1) into a rubber sheath, putting the rubber sheath into a cold isostatic press, and compacting under the pressure of 200MPa to obtain a green body;
(3) sintering the green body obtained in the step (2) in a vacuum sintering furnace, wherein the vacuum degree is 0.1Pa, the sintering temperature is 1400 ℃, and the heat preservation time is 2 hours to obtain a sintered titanium-molybdenum-niobium alloy;
(4) forging the sintered titanium-molybdenum-niobium alloy in the step (3) at the forging temperature of 1300 ℃;
(5) and (3) carrying out solution treatment on the titanium-molybdenum-niobium alloy obtained in the step (4) at 1100 ℃, preserving heat for 1h, then carrying out oil quenching and cooling to obtain the final titanium-molybdenum-niobium alloy, wherein no characteristic diffraction peak appears in a neutron diffraction experiment, the compression strength is 2100MPa, the plastic deformation is 14%, and the compression elastic modulus is 25GPa, so that the titanium-molybdenum-niobium alloy can be used as a neutron transparent material in the related fields of neutron diffraction, and can also be used as a biological implantation material in the medical field.
The foregoing is only a preferred embodiment of the invention. It should be noted that, for those skilled in the art, various improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (7)
1. A titanium molybdenum niobium alloy, characterized in that the titanium molybdenum niobium alloy comprises the following components: 20-45 wt% of molybdenum, 5-30 wt% of niobium and the balance of titanium; the titanium-molybdenum-niobium alloy has the structure of beta-Ti, the compressive strength of 1850-2000MPa, the plastic deformation of 10-15%, no characteristic diffraction peak in neutron diffraction experiment, and is applied to the related field of neutron diffraction.
2. The titanium molybdenum niobium alloy of claim 1, wherein the titanium molybdenum niobium alloy has the composition: 25-35 wt% of molybdenum, 15-25 wt% of niobium and the balance of titanium.
3. The titanium molybdenum niobium alloy according to claim 1, wherein the titanium molybdenum niobium alloy has a compressive elastic modulus of 22-32GPa, comparable to human bone, and can be used as a biological implant material in the medical field.
4. A method for producing the titanium molybdenum niobium alloy as claimed in any one of claims 1 to 3, characterized by comprising the steps of:
(1) the titanium molybdenum niobium alloy composition as claimed in claim 1, wherein the mass of Ti is converted to TiH2Of (2) by TiH2Respectively weighing the powder, Mo powder and Nb powder as raw materials, and uniformly mixing to obtain mixed powder;
(2) carrying out cold isostatic pressing on the mixed powder obtained in the step (1) to obtain a green body;
(3) sintering the green body obtained in the step (2) in a vacuum furnace to obtain a sintered titanium-molybdenum-niobium alloy;
(4) and (4) carrying out solid solution and quenching treatment on the sintered titanium-molybdenum-niobium alloy obtained in the step (3) to obtain the titanium-molybdenum-niobium alloy.
5. The preparation method according to claim 4, wherein the sintering temperature in step (3) is 1400 ℃ and 1600 ℃, the sintering time is 1-3h, and the vacuum degree is less than or equal to 1.33 x 10-1Pa。
6. The preparation method according to claim 4, characterized in that in the step (4), the solid solution temperature is 1000-1200 ℃, the temperature is kept for 1h, and then the oil quenching and cooling are carried out.
7. The preparation method according to claim 4, wherein the sintering Ti-Mo-Nb alloy is forged between the steps (3) and (4), the forging temperature is 1250-1350 ℃, the compressive strength of the Ti-Mo-Nb alloy after forging reaches 2000-2200MPa, and the plastic deformation is kept at 10-15%.
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| CN111996434A (en) * | 2020-08-21 | 2020-11-27 | 南方科技大学 | Block titanium molybdenum niobium alloy and preparation method thereof |
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