117results about How to "Good superelasticity" patented technology

The invention relates to a shape memory alloy web friction self-reset steel frame joint.The joint is composed of a column, a bracket, beams, shape memory alloy stay rope units, tensioning nuts, fixing nuts, arc hole high-strength bolts and central high-strength bolts.The bracket is welded to the side, close to the beams, of the column, a double-web mode is adopted for the bracket, and the bracket is connected with beam webs through the high-strength bolts.Arc holes are formed in the parts, at the arc hole high-strength bolts, of double webs of the bracket, the contact faces of the beam webs and the double webs of the bracket are subjected to friction treatment, friction parameters are adjusted with prestress of the high-strength bolts, the upper portions and the lower portions of the beams are connected with the column through the shape memory alloy stay rope units respectively, and the initial states of shape memory alloy stay ropes are controlled by adjusting the tensioning nuts and the fixing nuts.The shape memory alloy web friction self-reset steel frame joint has the advantages of being simple in structure, high in practicability, definite in stress, high in energy dissipation, capable of achieving self-resetting and the like.

The invention provides a product prepared from amorphous alloy and heterogeneous material, and a preparation method of the product. The product prepared from amorphous alloy and heterogeneous material comprises a core body prepared from the heterogeneous material, and an outer wall, wherein the outer wall is prepared from the amorphous alloy coating the outer surface of the core body; and the critical dimension of the amorphous alloy is larger than or equal to 1mm. The product has the advantages of high yield strength, high hardness, high elasticity, high abrasion resistance, high corrosion resistance, and low manufacture cost, thereby improving the applicability of the amorphous alloy.

The invention discloses a preparation method of a high high-strength nanocrystalline type medical Beta titanium alloy for orthopaedic implanting. The titanium alloy is the Ti-Nb-Mo-Sn alloy prepared by the following steps in sequence: treating the alloy ingredients in a vacuum arc melting furnace, and sequentially carrying out the processes of quickly solidifying, rolling at a low temperature and instantaneously ageing at a high temperature, thus obtaining the large-dimension nanocrystalline type titanium alloy. The alloy has the average crystalline dimension less than 60 nanometers, and has strength of 1200 to 1600MPa, plasticity of 15 to 20%, elasticity modulus of 40 to 60 GPa, and super-elasticity recovery strain of 4 to 5%. According to the preparation method, the treatment processes of quick solidifying, low-temperature rolling and instantaneous ageing are creatively combined to treat the titanium alloy, thus, the purpose of unifying high strength, excellent processing performance, low elasticity modulus and excellent super-elasticity performance is realized, and high technological effect and huge potential economic value are brought.

The invention relates to a polycrystalline Fe-Ni-Co-Al-Nb-B shape memory alloy with super elasticity and a preparation method thereof. The alloy comprises the following atoms: 30-50% of Fe, 28-40% of Ni, 10-30% of Co, 8-15% of Al, 1-4% of Nb and 0.1-3% of B. The preparation method of the alloy includes solid solution treatment and aging treatment. The shape memory alloy provided by the invention adopts a special alloy formula, and the preparation technology is simple and controllable. The shape memory alloy provided by the invention has significantly increased recoverable strain with the maximum recoverable strain reaching 10.5%, and shows excellent super elasticity.

The invention relates to an industrial preparation method of a titanium alloy casting ingot with high niobium content. The non-niobium included titanium alloy casting ingot with high niobium content and uniform chemical components can be prepared on an industrial scale by adopting the conventional vacuum consumable electric arc melting technology. The invention adopts the technical scheme that a consumable electrode of the titanium alloy casting ingot with high niobium content, which is suitably prepared by adopting the vacuum consumable electric arc melting technology, can be prepared; and the non-niobium included titanium alloy casting ingot with high niobium content and uniform chemical components can be prepared by adopting an industrial process similar to the conventional melting process for the titanium alloy casting ingot.

The invention discloses a processing method of a nickel-titanium shape memory alloy high-strength wire material. The processing method comprises the following steps that (1), a nickel-titanium alloy wire blank is subjected to peeling treatment, and the nickel-titanium alloy thick wire material is obtained; (2), the nickel-titanium alloy thick wire material in the first step is subjected to hot drawing, and the thick wire material in the nickel-titanium alloy is obtained; and (3), high-temperature annealing and water quenching are carried out on the thick wire material in the nickel-titanium alloy in the second step; (4), cold drawing and on-line annealing treatment are carried out on the thick wire material in the high-temperature annealed and water-quenched nickel-titanium alloy obtainedin the third step, and the nickel-titanium alloy fine wire material is obtained; and (5), on-line aging treatment and peeling treatment are carried out on the nickel-titanium alloy fine wire materialobtained in the fourth step, and the nickel-titanium shape memory alloy high-strength wire material is obtained.

The invention relates to high-purity helical carbon nanotubes and a preparation method thereof. The method comprises the following steps: (1) preparation of alpha-crystal-form nano iron oxide catalyst precursor: preparing the alpha-crystal-form nano iron oxide catalyst precursor by pre-precipitation in combination with a sol-gel process; and (2) preparation of high-purity helical carbon nanotubes: putting the alpha-crystal-form nano iron oxide catalyst precursor into a pipe furnace, reducing the alpha-crystal-form nano iron oxide catalyst precursor into a nano iron catalyst by an in-situ reduction process, introducing a carbon source and vapor as catalytic regulation aids, and keeping the temperature for 6-10 hours, thereby obtaining the igh-purity helical carbon nanotubes. The method is simple, safe and environment-friendly. The purity of the prepared helical carbon nanotubes is up to 99% or above, and the yield is up to 7709-8077 (g-HCNTs/g catalyst); and the product has uniform parameters (diameter, helical diameter, screw pitch and the like) and complete shape.

The invention discloses a memory alloy non-bracket invisible appliance and a manufacturing method thereof. The memory alloy non-bracket invisible appliance is composed of a base and a silicone rubber covering membrane, wherein the base is made of shape memory alloy filaments, and the silicone rubber covering membrane is coated on the surface of the base and displays dental primary color and gingiva color; the filaments are prepared from TiNi alloys good in shape memory effect, are good in flexibility at room temperature, and good in super elasticity at the oral temperature (32-37 DEG C). The manufacturing method of the appliance includes the steps of firstly obtaining a required original dentition model, processing an entity dentition model, conducting compression molding on a piece of rectangular dense mesh woven by the shape memory alloy filaments by using the entity dentition model to form an initial state base, and conducting heating and sizing; adjusting the phase-transition temperature, covering the base with the silicone rubber covering membrane, according to the complete denture manufacturing process, finishing the membrane to form a tooth-shaped part and a gingiva-shaped part, removing unwanted parts, dyeing the tooth-shaped part into dental primary color and dyeing the gingiva-shaped part into gingiva color. The memory alloy non-bracket invisible appliance has the advantages of being simple, easy to use, and high in orthodontic treatment effect.

The invention discloses a reinforced concrete column reinforcing structure and method. A reinforcing groove is vertically formed in a to-be-reinforced reinforced concrete column, and the interior of the reinforcing groove is coated with a filling material; the clean reinforcing groove is half filled with the filling material, then a memory alloy bar is placed into the clean reinforcing groove, andthe reinforcing groove is pressed into the filling material; then the reinforcing groove is filled with a filling material and compacted and leveled, so that the reinforced concrete column and the memory alloy bar form a whole. A near-surface reinforcing method is adopted, so that the bonding area of a reinforcing rib and the concrete is increased, the possibility of bonding stripping damage is reduced, and the bonding performance of the reinforcing rib and the concrete is improved. The characteristics of the memory alloy bar are utilized so that the energy dissipation capability of the reinforcing column can be remarkably improved, the residual deformation generated after stress of the concrete column is reduced, the damage self-repairing capability of a component is improved, rapid recovery of structure functions after earthquakes is achieved, and semi-active control over the reinforced concrete column is achieved.

The invention discloses a Cu-Al-Mn shape memory alloy damping device for a precise instrument and a manufacturing method of the Cu-Al-Mn shape memory alloy damping device. The damping device comprises a workbench, a damping assembly and a base. The damping assembly connects the workbench with the base. The damping assembly is composed of a plurality of columnar crystal tissue Cu-Al-Mn shape memory alloy plates with high anisotropism. The Cu-Al-Mn shape memory alloy damping device has the advantages that the damping device has the functional anisotropism, in other words, 10% or more high recovery strain can be provided in the vertical direction, the damping performance is superior, and good energy absorbing and damping functions are achieved; 7% or more high recovery strain in the horizontal direction can be provided, the energy absorbing and damping functions are achieved, and due to higher strength and rigidity of plates in the thickness direction, the damping device has good inclination resisting and shaking resisting functions, and the precise instrument can be kept stable in the using, or moving or transporting process.

The invention relates to Ti-Zr-Nb-Fe-Al-Ce super elastic alloy and products thereof. Because of adding appropriate amount of Fe, Al and Ce elements, the super elastic alloy has high erosion resistance and oxidation resistance as well as excellent welding performance, cold workability, phase-changing super elasticity, shape memory property and biocompatibility. The welding performance, the cold workability and the biocompatibility of the alloy are better than those of TiNi shape memory alloy, while the super elasticity and the shape memory property are equivalent to those of the TiNi shape memory alloy. The Ti-Zr-Nb-Fe-Al-Ce super elastic alloy not only can be used as biomaterial capable of being implanted in a human body for a long time, but also can be used as industrial products made from the alloy such as spectacle frame, bra support, golf club head, pipe joint, spring and drive element; moreover, the alloy has the advantages of easy processing, low cost and wide application range.

The invention provides a copper-based memory alloy mended and patched pipe as well as a preparation method, mending and patching method and application thereof. A copper-based memory alloy comprises the following elements by mass percent: 0.2-1.6% of Be, 6-14% of Al, 1-10% of Mn, 0-3% (more than 0) of Ga, 0-0.1% of impurities and the balance of Cu. The mended and patched pipe is formed by connecting an expansion component with connecting pipes, wherein the expansion component comprises an expanded cylinder, a conical connector and an internally threaded cylinder, which are connected with each other in sequence. The preparation method comprises the following steps: weighing the raw materials according to the alloy components, smelting the raw materials and then cooling the product in a directional solidification cooling system to prepare a cast ingot; then carrying out thermal mechanical treatment, thus obtaining the mended and patched pipe. The mended and patched pipe is simple in mending and patching process and can be in powerful interference fit with a casing to be mended and patched, thus generating great sealing pressure and friction between the mended and patched pipe and the casing and preventing oil leak and fall.

A middle temperature processing method for improving the superelasticity of NiTiV shape memory alloy is characterized by treating the NiTiV shape memory alloy( the component range is: 55.5 to 57.3 percent of Ni, 41.8 to 43.4 percent of Ti and 0.57 to 0.73 percent of V) with middle temperature processing. A phase transition point Af is equal to minus 35 DEG C to minus 5 DEG C; when the middle temperature processing temperature is 440 DEG C and the temperature is maintained for 20min, very perfect nonlinear superelasticity can be achieved and the superelasticity of the NiTiV shape memory alloy reaches maximum.

The invention provides a surface modification method of a NiTi alloy martensitic root canal file. According to the method, a metal coating is deposited on the surface of the root canal file by use of a magnetic sputtering process; annealing treatment is performed under the conditions that a vacuum degree is not lower than 10<-3>Pa and the temperature is 600-900 DEG C, so that the metal elements of the coating are diffused to enter a martensitic root canal file substrate, the surface of the root canal file is a parent phase at the operating temperature, and martensite is formed inside the root canal file. The surface modification method is provided mainly for solving the problems of low strength and non-ideal cutting efficiency of the NiTi alloy martensitic root canal file. The surface modification method is also used for solving the problem of low bonding strength between the coating and the substrate of the root canal file. The surface modification method is simple in process, and low in requirements on equipment; the prepared root canal file has the advantages of high cutting efficiency, high fatigue resistance and the like.

A preparation method for radioactivity TiNi alloy bracket without fringe effect relates to a preparation method for a radioactivity bracket. The preparation method solves the problem of high restenosis rate of the edge of the bracket caused by weak penetrating power of a pure <32>P ray and uniform dosage around the bracket. The method comprises the following steps of: 1. preparing a cast ingot, 2. preparing cold-drawn wires; 3 twisting cold-drawn wires into a bracket, heat processing in vacuum, chemical polishing, ultrasonic washing and drying; 4. putting the dried bracket into a plasma-based injection system for slow neutrons irradiation; 5. annealing the irritated bracket and then cooling the irritated bracket, thus obtaining the radioactivity TiNi alloy bracket. The radioactivity TiNi alloy bracket obtained by the invention both preserves the excellent superelasticity, good corrosion resistance and biomedical science performances of the alloy, also can obtain mixed rays dominated by <32> P, and improves the uniformity of the dosage distribution of the rays around the bracket and is beneficial to inhibiting the fringe effect.