93 results about "Beta type" patented technology

There is provided an α-β type titanium alloy having a normal-temperature strength equivalent to, or exceeding that of a Ti-6Al-4V alloy generally used as a high-strength titanium alloy, and excellent in hot workability including hot forgeability and subsequent secondary workability, and capable of being hot-worked into a desired shape at a low cost efficiently. There is disclosed an α-β type titanium alloy having high strength and excellent hot workability wherein 0.08-0.25% C is contained, the tensile strength at room temperature (25° C.) after annealing at 700° C. is 895 MPa or more, the flow stress upon greeble test at 850° C. is 200 MPa or less, and the tensile strength/flow stress ratio is 9 or more. A particularly preferred α-β type titanium alloy comprises 3-7% Al and 0.08-025% C as α-stabilizers, and 2.0-6.0% Cr and 0.3-1.0% Fe as β-stabilizers.

A beta-type free-piston Stirling cycle engine or cooler is drivingly coupled to a linear alternator or linear motor and has an improved balancing system to minimize vibration without the need for a separate vibration balancing unit. The stator of the linear motor or alternator is mounted to the interior of the casing through an interposed spring to provide an oscillating system permitting the stator to reciprocate and flex the spring during operation of the Stirling machine and coupled transducer. The natural frequency of oscillation, ω_s, of the stator is maintained essentially equal to ω_p

and the natural frequency of oscillation of the piston, ∩_p, is maintained essentially equal to the operating frequency, ω_o of the coupled Stirling machine and alternator or motor. For applications in which variations of the average temperature and/or the average pressure of the working gas cause more than insubstantial variations of the piston resonant frequency ω_p, various alternative means for compensating for those changes in order to maintain vibration balancing are also disclosed.

The invention discloses a beta-Ti alloy, which comprises the components by weight percentage as follows: molybdenum is 9 to 15 percent, niobium is 6 to 10 percent, tantalum is 2 to 6 percent, zirconium is 2 to 6 percent, aluminum is 1 to 3 percent, ferrum is less than or equal to 1.0 percent, carbon is less than or equal to 0.1 percent, nitrogen is less than or equal to 0.05 percent, hydrogen is less than or equal to 0.015 percent, oxygen is less than or equal to 0.02 percent, and titanium is in the balancing amount. A preparation method comprises the steps as follows: sponge titanium, pure aluminium, sponge zirconium, Ti-Mo (the Mo is 31 percent), Ti-Nb (Nb is 53 percent) and Al-Ta (Ta is 80 percent) are mixed and made into a consumable electrode; the consumable electrode is smelted through a vacuum consumable electrode arc furnace to obtain a primary cast ingot; the primary cast ingot is used as the consumable electrode and is smelted to obtain a secondary cast ingot; the secondary cast ingot is used as the consumable electrode and is processed through vacuum consumable smelting to obtain finished products that is titanium alloy ingot. The beta-Ti alloy not only has high hardness, but also has higher unit extension and plasticity, and not only satisfies the intensity of application requirement, but also is easy to manufacture and mold and reduces the energy consumption.

This invention discloses a beta-type Ti alloy with low elastic modulus for mrdical application. The Ti alloy comprises: Nb 30-37%, Zr 0-20%, and Ti. The cast structure of the Ti alloy is beta phase. The Ti alloy has moderate strength, and can satisfy the strength requirement for clinical bearing material. The elastic modulus of the Ti alloy is only 45-55% that of Ti-6Al-4V alloy. The alloy is a casting alloy, and has no noble metals added such as Ta, thus effectively lowering the cost. Besides, all the added elements have biocompatibility, and toxic elements are avoided. The Ti alloy has high biocompatibility and mechanical compatibility, and can be used to produce bone plates with reduced stress shielding effect.

The invention discloses a low-cost alpha plus beta type titanium alloy, which consists of 4.5-8 percent of aluminum, 0.3-3 percent of chromium, 0.3-2 percent of iron, and the rest of titanium and inevitable impurities by weight percent, wherein 0-3 percent of molybdenum, 0-3 percent of tin or 0-3 percent of zirconium can also be included. The alpha plus beta type titanium alloy of the invention has low cost of constituent elements and high comprehensive mechanical performance equivalent to Ti-6Al-4V, thus not only reducing the production cost of the titanium alloy, but also improving the cost performance. Therefore, the low-cost alpha plus beta type titanium alloy has wide market prospect.

The invention discloses a low-cost Alpha+Beta type titanium alloy, the titanium alloy contains, in weight percent: aluminum 4.5 to 8 percent, chromium 0.3 to 2 percent, iron 0.3 to 2 percent, molybdenum 0 to 1 percent, balance titanium and unavoidable impurities. The Alpha+Beta type titanium alloy of the invention contains no noble metal of vanadium, and has equivalent comprehensive mechanical properties compared with Ti-6Al-4V, thereby increasing the price performance ratio while reducing the titanium alloy manufacturing cost, and having the broad market prospect.

A near-beta titanium alloy having higher strength than ‘Ti-17’ is provided, while suppressing cost increase. Such a near-&bgr; titanium alloy consists of, in weight percent, 0.5-7% of V, 0.5-2.5% of Fe, 0.5-5% of Mo, 0.5-5% of Cr, 3-7% of Al, and the balance of Ti and impurities. When the weight % of V content is expressed as X_V, the weight % of Fe content is expressed as X_Fe, the weight % of Mo content is expressed as X_Mo, and the weight % of Cr content is expressed as X_Cr; the value of X_V+2.95X_Fe+1.5X_Mo+1.65X_Cr is 9-17%.

The invention provides an alpha+beta type titanium alloy wire for 960MPa intensity level electron beam fused deposition rapid-forming members. The alpha+beta type titanium alloy wire is characterized by intensifying an alpha phase through adopting alloy elements Al, C and O and intensifying a beta phase through adopting alloy elements V, Fe and Si, the wire comprises the following components in percentage by weight: 6.2-7.2% of Al, 4.0-5.5% of V, 0.10-0.50% of Fe, 0.12-0.22% of O, 0.05-0.12% of Si, 0.03-0.08% of C, and the balance of Ti and inevitable impurity elements. The invention further provides a melting technology, a heating processing technology and a heating processing technology for electron beam rapid-forming members accordingly. The wire not only can meet the requirement on the electron beam fused deposition rapid-forming technology, but also enable the titanium alloy members to have excellent mechanical property. Therefore, the popularization and application of the alpha+beta type titanium alloy wire certainly create tremendous social benefits and economic benefits.

The present invention provides a beta-type titanium alloy including, by weight %: Nb: 10 to 25%; Cr: 1 to 10%; at least one of Zr: 10% or less and Sn: 8% or less, satisfying Zr+Sn being 10% or less; and the balance of Ti and inevitable impurities, the alloy having Young's modulus of 100 GPa or less, a process for producing the beta-type titanium alloy, and a beta-type titanium alloy product.

Disclosed is a β-titanium alloy consisting of, in weight percent, 5-15% of V, 0.5-2.5% of Fe, 0.5-6% of Mo, 0.5-5% of Cr, 1.5-5% of Al, and the balance of Ti and impurities. When the weight % of V content is expressed as X_V, the weight % of Fe content is expressed as X_Fe, the weight % of Mo content is expressed as X_Mo, and the weight % of Cr content is expressed as X_Cr; the value of X_V+2.95X_Fe+1.5X_Mo+1.65 X_Cr is 15-23%. Such a β-titanium alloy has excellent cold workability, while having higher strength than Ti-20V-4Al-1Sn β-titanium alloy.

The invention belongs to the technical field of materials sciences, and relates to a near beta-type high-strength titanium alloy. The alloy is characterized by comprising the following elements in percentage by weight: 2.5 to 3.5 percent of Al, 2.8 to 3.5 percent of V, 2.9 to 4.5 percent of Mo, 1.5 to 2.9 percent of Cr, 4.1 to 6 percent of Zr, 2 to 4 percent of Sn, 1 to 2 percent of Fe and the balance of Ti; and the alloy also comprises the following impurity elements: less than or equal to 0.04 percent of C, less than or equal to 0.15 percent of O, less than or equal to 0.04 percent of N, and less than or equal to 0.015 percent of H. Good mechanical property of the near beta-type titanium alloy is maintained, segregation of the components is not easily caused, and meanwhile, the production cost of the alloy is reduced to a certain degree; and the alloy can be widely applied in the industrial fields of aviation, aerospace, automobiles and the like.

The invention provides a low-elastic-modulus beta type titanium alloy for dental filling. The low-elastic-modulus beta type titanium alloy is characterized by being prepared from alloy components according to the weight percent: 23 to 24 percent of Mo, 12 to 13 percent of Nb, 2.5 to 2.8 percent of Zr, 2.1 to 2.2 percent of Al, 1.1 to 1.7 percent of Cr, 0.5 to 0.6 percent of Ag, 0.2 to 0.3 percentof Fe, 0.4 to 0.7 percent of Ta, 0.15 to 0.2 percent of Cu, 0.3 to 0.45 percent of Hf, 0.2 to 0.4 percent of Sn, 0.05 to 0.08 percent of Er, less than or equal to 0.05 percent of O, less than or equalto 0.01 percent of H, less than or equal to 0.02 percent of C, less than or equal to 0.01 percent of N and the balance of Ti and unavoidable impurities; the beta type titanium alloy formed by heat treatment has the average crystallization grain diameter of 20 to 40mu m, the yield strength of 900 to 1000MPa, the tensile strength of 1020 to 1150MPa, the elongation percentage of 15 to 17 percent, the Young's modulus of 40 to 60GPa, the primary alpha-phase volume percent of 22 to 25 percent, the size of 2 to 3 microns and the secondary alpha-phase volume percent of 22 to 25 percent.

The invention discloses a nearly beta-type high-toughness titanium alloy. The nearly beta-type high-toughness titanium alloy comprises the following components in percentage by mass: 4.0%-5.5% of Al,0.8%-1.8% of Zr, 3.0%-4.5% of Mo, 1.0%-2.0% of V, 1.5%-2.5% of Fe, 2.5%-3.5% of Cr, no more than 0.12% of B, and the balance Ti and inevitable impurities. The invention also discloses a preparation method of the nearly beta-type high-toughness titanium alloy. According to the preparation method, a large amount of TA15 recycled material is adopted as a raw material; an Al-Zr system is adopted to reinforce an alpha phase in the titanium alloy, and a Mo-V-Cr-Fe system is adopted to reinforce a beta phase in the titanium alloy, so that the coupling reinforcement effect is enhanced; the titanium alloy has good strength and toughness matching; the aluminum equivalent and the molybdenum equivalent of the titanium alloy are controlled, so that the great strength and toughness of the titanium alloyis ensured; and the TA15 titanium alloy recycled material is used as a raw material, so that the preparation cost is greatly reduced.

The invention discloses a method for enhancing work hardening capacity of a beta-type amorphous alloy endogenous composite material and belongs to the technical field of an amorphous alloy composite material. According to the method, content of beta-phase stable element in the chemical components of the beta-type amorphous alloy endogenous composite material is adjusted such that the beta-phase has proper structural metastability. Then, an obtained sample can undergo deformation-induced martensitic transformation and/or twinning so as to enhance work hardening capacity of the beta-type amorphous alloy endogenous composite material. The key of the method is to regulate and control structural metastability of the in-situ precipitated beta-phase. The method has important value for designing and developing the beta-type amorphous alloy endogenous composite material with excellent mechanical properties.

The invention relates to a heat treatment process for improving obdurability of a near beta type or metastable beta type titanium alloy. The process comprises the following steps of: firstly, preserving heat at the temperature of T which is more than or equal to T beta-50 DEG C and less than or equal to T beta-10 DEG C, wherein the heat preservation time T (min) is eta * delta max, the delta max is the maximum section thickness of a forge piece, the unit is mm, the eta is a heating coefficient, and the value of the heating coefficient eta is 0.5 to 1.5min/mm; secondly, discharging the forge piece out of a furnace and cooling the forge piece to room temperature by air or water; thirdly, preserving heat of the cooled forge piece at the temperature of T which is more than or equal to 520 DEGC and less than or equal to 560 DEG C, wherein the heat preservation time T is more than or equal to 20min and less than or equal to 1.5h; fourthly, discharging the forge piece out of the furnace andcooling the forge piece to room temperature by air; fifthly, slowly heating the cooled forge piece to the temperature of T which is more than or equal to 480 DEG C and less than or equal to 540 DEG Calong with the furnace, wherein the heating rate is controlled to be within 5 DEG C/min, and the heat preservation time T is more than or equal to 6h and less than or equal to 12h; and finally, cooling the forge piece along with the furnace or discharging the forge piece out of the furnace and cooling the forge piece to room temperature by air. The process is suitable for heat treatment of the near beta type or metastable beta type titanium alloy with ultrahigh obdurability so as to obtain a tissue with high comprehensive performance and multi-scale precipitated phases, which has the requiredultrahigh strength (Rm is more than or equal to 1,500 MPa), high plasticity (A is more than or equal to 5 percent) and high obdurability (KIC is more than or equal to 45 MPa.m < 1/2 >), and meet important bearing structural members with ultrahigh obdurability matching required by airplanes.

The invention relates to a machining method for a metastable beta type titanium alloy TB16 cold rolled tube. The method includes blending raw materials of a TB16 titanium alloy, preparing a cast ingot, performing blooming forging, extruding a tube, performing sand blasting, performing acid washing, subjecting the tube to multi-pass rolling, subjecting a tube finished product to solution treatmentand ageing treatment, and other steps. Raw materials of the TB16 titanium alloy comprise 4.5-5.7 wt% of Mo, 4.5-5.7 wt% of V, 5.5-6.5 wt% of Cr, 2.5-3.5 wt% of Al, less than 0.30 wt% of Fe, less than0.05 wt% of C, less than 0.04 wt% of N, less than 0.015 wt% of H and less than 0.15 wt% of O, with the balance being titanium. The alloy has high tensile strength, toughness and good welding performance, and can be used in the fields of aviation, aerospace, oil, ships, chemical engineering, and the like.

The present invention relates to the components and preparation process of new type multipurpose beta-type titanium alloy with high strength, high elasticity, high plasticity, excellent cold machining performance, and good welding performance. The beta-type titanium alloy consists of V 20-23 wt% and Al 3.5-4.5 wt%, except Ti and inevitable impurity, including Fe not more than 1.0 wt%, C not more than 0.1 wt%, N2 not more than 0.05 wt%, and O2 not more than 0.02 wt%. The beta-type titanium alloy may be used in producing spectacle frame, golf club head or its hit panel, various elastic parts, standard parts, etc.

The invention discloses gypsum-based putty. The gypsum-based putty comprises the following components in parts by mass: 30-40 parts of beta-type hemihydrate gypsum, 3-7 parts of ash calcium, 2-3 partsof silica fume, 3-5 parts of mineral slag, 50-60 parts of triple superphosphate, 0.8-1.5 parts of redispersible latex powder, 0.3-0.4 part of cellulose ether, 0.03-0.05 part of starch ether, 0.2-0.5part of wood fiber, 0.1-0.5 part of a hydrophobic agent and 0.06-0.1 part of a retarder. The gypsum-based putty uses the beta-type hemihydrate gypsum as a main cementing material and uses the ash calcium, mineral slag and the silica fume as auxiliary cementing materials, and the components react with one another so as to improve the mechanical properties and the water resistance of the cementing system; the gypsum-based putty has excellent adhesion, water resistance and flexibility, and raw materials are wide in sources and low in cost; the 7d bonding strength of the gypsum-based putty reaches0.9MPa, and the flooding bonding strength thereof reaches 0.4MPa or above.

The invention discloses a production method of a high-permeability low-density lithium battery polyolefin diaphragm. The production method comprises the following steps of 1, preparing a nucleating agent, 2, mixing 50 to 80% of a metallocene-catalyzed polypropylene homopolymer, 20 to 50% of a metallocene-catalyzed polypropylene block copolymer and 1 to 4% of the nucleating agent, extruding the mixture by an extruder to obtain a diaphragm, cooling the diaphragm by a chilling roller at a temperature of 100 to 150 DEG C for 2 to 15 minutes so that a mass of beta-type crystals are produced and fully grows in the diaphragm, and cooling to obtain a casted sheet, and 3, carrying out vertical stretching and horizontal stretching of the casted sheet to obtain the high-permeability low-density lithium battery polyolefin diaphragm having density less than or equal to 0.55g/cm<3> and thickness of 12 to 60 micrometers, wherein a stretching temperature is in a range of 90 to 160 DEG C; and an area stretching ratio is in a range of 8 to 40. The high-permeability low-density lithium battery polyolefin diaphragm obtained by the production method has unique performances of high non-transparency, high gas permeability, low density (high porosity), high moisture permeability and high strength. A stretching ratio of the high-permeability low-density lithium battery polyolefin diaphragm is in a range of 8 to 40. The density of the high-permeability low-density lithium battery polyolefin diaphragm is less than 0.55g/cm<3>, and preferably, is 0.30g/cm<3>.

The invention provides a rare golden carp beta type estrogen receptor and an encoded gene thereof. The invention also provides a method for detecting the chemical toxicity of an aquatic environment and a kit for diagnosing the diseases of aquatics. The method and the kit both relate to the detection of the expression level of the receptor. The invention is applied to detecting the chemical toxicity of the aquatic environment and diagnosing the diseases of aquatics, in particular the piscine genital system diseases, thereby realizing the aim of regulating the piscine reproductive ability. Experimental results show that: the expression of the GrER beta gene has a dosage-effect relationship with the estrogen effect; therefore the method has the advantage of simple, quick and correct operation.

The invention discloses a beta-type similar high-strength and high-tenacity titanium alloy. The beta-type similar high-strength and high-tenacity titanium alloy is characterized by comprising alloy elements, by weight percentage, including 2.5%-3.5% of Al, 4%-6% of Mo, 4%-6% of V, 3%-5% of Cr, 1.5%-3% of Nb and the balance titanium and unavoidable impurities. According to the beta-type similar high-strength and high-tenacity titanium alloy, the tensile strength Rm is larger than or equal to 1,300 MPa, the yield strength Rp0.2 is larger than or equal to 1,200 MPa, the breaking tenacity K1C is larger than or equal to 70 MPa.m<1/2>, and the alloy is a high-strength and high-tenacity beta-type similar titanium alloy.

The present invention provides a β-type titanium alloy keeping the content of the relatively expensive β-stabilizing elements such as V or Mo down to a total of 10 mass % or less and reducing the effects of composition segregation of Fe and Cr and thereby able to keep the Young's modulus and density relatively low. The β-type titanium alloy of the present invention comprises, by mass %, when Al: 2 to 5%, 1) Fe: 2 to 4%, Cr: 6.2 to 11%, and V: 4 to 10%, 2) Fe: 2 to 4%, Cr: 5 to 11%, and Mo: 4 to 10%, or 3) Fe: 2 to 4%, Cr: 5.5 to 11%, and Mo+V (total of Mo and V): 4 to 10% in range, and a balance of substantially Ti. These include Zr added in amounts of 1 to 4 mass %. Furthermore, by making the oxygen equivalent Q 0.15 to 0.30 or leaving the alloy in the work hardened state or by applying both, the tensile strength before aging heat treatment can be further increased. Due to this, it is possible to obtain the required strength even if the amount of precipitation of the α phase with the high Young's modulus is small.