11 results about "Beta titanium alloy" patented technology

The application relates to the technical field of titanium alloy and discloses a titanium alloy based on laser powder bed melting and a preparation method thereof, the titanium alloy comprises the following elements in percentage by weight: 85-93% of titanium, 4-6% of molybdenum, 2-4% of iron, 1-4% of tin, and inevitable impurities as the balance; the forming state organization of the titanium alloy prepared through laser powder bed melting technology is composed of metastable beta phase and fine and dispersed nanometer omega phase, and the size of the nanometer omega phase is 3-6 nm. The titanium alloy of the application has super-high strength and good plasticity, does not need a subsequent heat treatment process, and realizes low-cost, high-performance and short-process preparation of metastable beta titanium alloy.

This invention provides a biocompatible β This invention relates to a method for composite modification of titanium alloy surfaces, belonging to the technical field of alloy modification methods. The invention includes applications in medical... β This invention involves introducing bioactive particles onto the surface of a titanium alloy substrate, performing friction stir processing (FSP) on the substrate to introduce bioactive particles and construct a gradient grain structure, and then subjecting the FSP-treated substrate to compressed plasma flow (CPF) treatment to achieve uniform distribution of bioactive particles and construct a topology with an average surface roughness of 3-6 μm suitable for cell growth. The invention precisely controls the amount of bioactive particles introduced and constructs a gradient grain structure through friction stir processing (FSP); simultaneously, compressed plasma flow (CPF) technology achieves uniform distribution of bioactive particles and an ideal surface roughness of 3-6 μm on the titanium alloy surface. Ultimately, this significantly improves the cell adhesion, proliferation capacity, and osteogenic properties of the material surface, solving the technical problem of low integration efficiency of traditional titanium alloy implants with human bone tissue.

The application discloses a kind of preparation methods of laser forming high-strength titanium alloy based on mixed alloy powder, to solve the problem such as high dependence of high-strength titanium alloy manufacturing on custom powder, poor strength and plasticity matching.The application determines metastable beta titanium alloy and duplex titanium alloy powder ratio based on multidimensional theory; by laser forming, the volume energy density is controlled to be 50-90J / mm 3 In-situ alloying is realized; by two-stage heat treatment, solid solution at 780-900 DEG C and aging at 400-600 DEG C, the heterogeneous structure of large-size primary alpha phase cluster and fine secondary alpha phase interweaving is constructed.The application significantly reduces the preparation cost, and realizes the high coordination of strength and plasticity.

The application provides a corrosion-resistant titanium alloy β Titanium alloy and surface modification method thereof, belong to alloy modification technical field.The application includes in β A layer of nano Zn particles is laid on the surface of titanium alloy base material, a gradient structure bottom layer containing Zn is constructed by adopting a friction stir processing technology, the treated base material is handled by compression plasma flow, and a dense smooth surface layer combined with the gradient structure bottom layer containing Zn is constructed.The application constructs a gradient structure bottom layer containing Zn by adopting a friction stir processing technology, handles by compression plasma flow, constructs a dense smooth surface layer combined with the gradient structure bottom layer containing Zn, and is characterized by the following advantages: β The titanium alloy surface forms a composite modified layer with longitudinal gradient structure and low roughness surface layer.The corrosion resistance of the titanium alloy in a simulated physiological environment is significantly improved β The titanium alloy in a simulated physiological environment is significantly improved, and the process is physical modification without harmful reagents, and is suitable for the mechanical matching and biocompatibility requirements of bone implants.

The application discloses a kind of high-strength plastic β titanium alloy strip and whole-process preparation method, the β titanium alloy strip is composed of the following mass percentage components: Cr 7.7%~8.3%, Mo 4.9%~5.5%, V 4.9%~5.5%, Al 2.7%~3.3%, Fe≤0.20%, C≤0.03%, N≤0.02%, H≤0.010%, O≤0.10%, and the rest is Ti;The preparation method comprises: one, forging;Two, hot rolling;Three, cold rolling;Four, heat treatment.The β titanium alloy strip and whole-process preparation method of the application are overall planning from component design to final heat treatment whole-process procedure, improve production efficiency, shorten preparation time, and the β titanium alloy strip solid solution state microstructure is equiaxed β fine grain structure, strength-plasticity matching is high, horizontal longitudinal organization performance is uniform, with excellent comprehensive mechanical properties, applicable to metal processing field.

This invention provides a method for regulating the microstructure and strength-plasticity matching of metastable β-titanium alloys based on the synergistic mechanism of precipitate growth and dissolution. Metastable β-titanium alloys with a basketweave microstructure are heat-treated using a temperature-controlled sample delivery method, held at a two-phase temperature, and then air-cooled. This invention, through research on the regulation of the size characteristics, phase structure, and phase density of the basketweave α phase at grain boundaries and within grains, simplifies the process while achieving synergistic optimization of strength and plasticity. This addresses a pressing technical bottleneck in the current field of metastable β-titanium alloys, achieving an excellent balance between strength and plasticity in the basketweave microstructure of metastable β-titanium alloys by optimizing heat treatment process parameters.

This invention discloses a method for preparing TB15 metastable β titanium alloy, belonging to the field of titanium alloy heat treatment technology. The method involves performing a two-phase region solution heat treatment on TB15 titanium alloy to obtain a solution-treated titanium alloy containing primary equiaxed αp phases. After holding at this temperature, no cooling treatment is performed. The solution-treated titanium alloy is then directly subjected to aging treatment without cooling at a temperature of 550℃ to 570℃ for 4 to 6 hours, allowing the acicular secondary αs phase to disperse and precipitate before cooling to room temperature. This invention eliminates the traditional water-cooling process after solution treatment, utilizing a transfer heat treatment path of direct heated aging after solution treatment. This avoids the formation of Widmanstätten structure at grain boundaries, effectively improving plasticity and fracture toughness while maintaining high alloy strength. It is suitable for the preparation of titanium alloy structural parts in aerospace, automotive, and other industrial fields.

The present application relates to the field of wear-resistant and corrosion-resistant high-speed rotating screen, in particular to a wear-resistant and corrosion-resistant high-strength titanium alloy slit screen and a preparation method thereof. First, high-strength beta titanium alloy plate material with excellent cold workability and welding performance is selected as raw material, and the screen meeting the size requirements is prepared through laser cutting, cold roll forming and laser welding, and then aging treatment is carried out to meet the performance requirements. Then, the rough inner wall of the laser cutting gap is treated by electrolytic polishing process, so that the roughness is within 0.8 μm. Subsequently, the plate material with slits is rolled into the designed screen shape by using a plate rolling machine, and the both sides are welded by laser, thereby completing the manufacture of the screen shape. Finally, the milling machine is used to process the outside of the screen to have a gradient step profile, so as to reduce the filtrate passing path. The slit screen prepared by the method has high structural strength and rigidity, small running noise, excellent corrosion resistance and wear resistance, and can meet the solid-liquid screening requirements in harsh environment.

An alpha-beta titanium alloy comprising (by weight): 5.0-8.0 % aluminium, 1.0-5.5 % vanadium, 0.75-2.5 5 molybdenum, optionally 0.2-1.0 % iron, 0.1-0.2 % silicon and 0.25 % or less oxygen, with the ba

The application belongs to the technical field of strengthening and toughening treatment of titanium alloy, and particularly relates to a method for improving the strength and plasticity of metastable beta titanium alloy. The method provided by the application can avoid grain coarsening and quantitatively control the precipitation of alpha phase at grain boundaries and near the grain boundaries by performing solid solution treatment on metastable beta titanium alloy in the alpha+beta dual-phase region and combining with water quenching treatment, so that a microstructure with beta phase in the core of the grain and alpha precipitated phase at the grain boundary is obtained. The method can greatly improve the yield strength of metastable beta titanium alloy while ensuring that the original twin-induced plasticity / phase transformation-induced plasticity effect is not inhibited, effectively solving the technical problem that the existing metastable beta titanium alloy sacrifices plasticity while improving yield strength. In addition, the method has the advantages of simple operation, low cost and wide application range, and can solve the problems of high preparation cost and complex strengthening method of the existing method, and has a wide application prospect in the strengthening and toughening of metastable beta titanium alloy.