148 results about "Titanium nickel alloy" patented technology

The invention belongs to the technical field of preparation of shape memory alloys, and discloses a 4D printing method and application of a titanium-nickel shape memory alloy. Pure titanium and pure nickel are matched and smelted, and titanium-nickel alloy bars are obtained; then alloy powder is prepared through a rotating electrode atomization method, the powder is screened, and titanium-nickel alloy powder with the grain size of 15 micrometers to 53 micrometers is obtained; and the obtained titanium-nickel alloy powder is placed in a discharge plasma assisted ball mill to be subjected to discharge treatment, the powder is subjected to surface modification, and finally the titanium-nickel shape memory alloy is formed by means of SLM forming. The phase composition of the obtained titanium-nickel shape memory alloy is composed of a B2 austenite phase of a CsC1 type structure, a B19' Martensite phase of a monocline structure and a Ti2Ni precipitated phase. The microstructure comprises nano-sized afterbirth-like crystals and micro dendrite, and the afterbirth-like crystals and the dendrite are alternately distributed in a layered manner. The advantages of being unique in organizationstructure, nearly fully dense and ultrahigh in performance are achieved.

The invention relates to powder material for boiler tube high temperature resistance and wear resistance protecting and a preparation method thereof, and belongs to the technical field of surface engineering. The power material comprises the following components, by weight percentage, 10-20% of titanium-nickel alloy powder, 1.5-3.5% of graphite powder, 0.5-1% of silica powder, 8-25% of nickel-chromium alloy powder Ni80Cr20, 5-10% of iron boride powder and the balance of tri-chromium dicarbide powder. The preparation method comprises the following steps that power material is prepared, mix powder is formed, liquid-containing binders are prepared, sizing agents are prepared from the mix powder, prilling is completed through spray drying, and finished product powder is prepared from screening the prilling powder and is used for preparing a cladding layer. The metal cladding layer with high wear resistant duplex ceramic is formed through laser cladding, and the hardness ranges from 1100 HV to 1600 HV, so that the powder material for boiler tube high temperature resistance and wear resistance protecting and the preparation method thereof has the advantages that efficiency of the laser cladding is higher, loss of powder spattering is low, grain of the cladding layer is tiny, wear resistance of the cladding layer is high and the like.

This invention discloses a method, using pure niobium as a transient liquid reactive braze material, for fabrication of cellular or honeycomb structures, wire space-frames or other sparse builtup structures or discrete articles using Nitinol (near-equiatomic titanium-nickel alloy) and related shape-memory and superelastic alloys. Nitinol shape memory alloys (SMAs), acquired in a form such as corrugated sheet, discrete tubes or wires, may be joined together using the newly discovered joining technique. Pure niobium when brought into contact with nitinol at elevated temperature, liquefies at temperatures below the melting point and flows readily into capillary spaces between the elements to be joined, thus forming a strong joint.

This invention discloses a method, using pure niobium as a transient liquid reactive braze material, for fabrication of cellular or honeycomb structures, wire space-frames or other sparse builtup structures or discrete articles using Nitinol (near-equiatomic titanium-nickel alloy) and related shape-memory and superelastic alloys. Nitinol shape memory alloys (SMAs), acquired in a form such as corrugated sheet, discrete tubes or wires, may be joined together using the newly discovered joining technique. Pure niobium when brought into contact with nitinol at elevated temperature, liquefies at temperatures below the melting point and flows readily into capillary spaces between the elements to be joined, thus forming a strong joint.

The invention is an isometric angle squeezing producing method for a kind of micron tiny crystal titanium nickel alloy block materials. Titanium and nickel whose atom percentage are 45%-52% and 48%-55% are melted in vacuum, produces the titanium nickel base alloy cast ingot, cuts the block materials into blanks, and carries on surface finish process, and paints with glass lubricate, uses squeezing mould with 90-120 degrees angle, the surface of mould cavity is painted with black lead lubricate, the blank, mould are heated, and they are taken out from the stove and carried on with angle squeezing, finally acquires the titanium nickel base alloy block materials with excellent intensity and plasticity. The invention enhances the mechanical property of alloy, and reduces the cost.

The invention discloses a preparation method of equal-atomic-ratio titanium-nickel alloy ingots. The preparation method comprises the following steps of: firstly, melting and preparing primary titanium-nickel alloy ingots by utilizing a vacuum induction furnace; and secondly, carrying out group welding on the primary titanium-nickel alloy ingots to form consumable electrodes, and carrying out consumable electrode vacuum furnace melting on the consumable electrodes to form secondary titanium-nickel alloy ingots. According to the preparation method, titanium-nickel binary alloys with the nickel content of 49-52 at% or ternary or complex alloy ingots containing elements such as Fe, V, Al, Nb and Cr can be prepared; and the alloy components are uniform, the impurity content is low, and the requirements on the titanium-nickel alloys in the fields of electrons, machineries, space navigation, energy sources, medical treatment and public health, daily necessities and the like are met.

The invention discloses a preparation method of a low-carbon and low-oxygen titanium-nickel alloy large ingot. The preparation method comprises the steps of: preparing a titanium-nickel alloy primary ingot through smelting in a vacuum induction furnace, installing and welding the titanium-nickel alloy primary ingot to obtain a consumable electrode, and implementing consumable melting in vacuum to obtain a titanium-nickel alloy secondary ingot. The method is suitable for casting a titanium-nickel binary alloy in which the nickel content accounts for 49-52at%, and is capable of effectively controlling the contents of impurities, wherein C% is not greater than 0.05%, O+N% is not greater than 0.05%, H% is not greater than 0.005%, and the like. The preparation method can meet demands of medical health and other fields on the titanium-nickel alloy.

The invention provides an improved support artificial blood vessel. The improved support artificial blood vessel comprises a dacron artificial blood vessel body and a support artificial blood vessel body. One end of the dacron artificial blood vessel body is communicated with one end of the support artificial blood vessel body. The pipe wall of the dacron artificial blood vessel body is communicated with a branch artificial blood vessel body. The side, close to the support artificial blood vessel body, of the outer pipe wall of the branch artificial blood vessel body is 1 cm away from the support artificial blood vessel body. A W-shaped titanium-nickel alloy metal support with a self-expansion function is fixed to the inner surface of the support artificial blood vessel body. A W-shaped titanium-nickel alloy metal support with a self-expansion function is fixed to the inner surface of the branch artificial blood vessel body. When the improved support artificial blood vessel with the branch is used for conducting DeBakey I type aortic dissection treatment, the effect of replacing the aortic dissection without replacing the branch of the aortic dissection can be achieved, surgery operation can be simplified, and the improved support artificial blood vessel is easy to master and has important clinical application value.

The invention discloses a forging method for an equal-atomic-ratio titanium-nickel alloy large cast ingot. The titanium-nickel alloy large cast ingot is subjected to homogenization treatment, the technological parameter is 930-980 DEG C, and heat preservation time is 10-12 h, and air cooling is conducted; the air-cooled titanium-nickel alloy large cast ingot is subjected to the first heating number of forging, the heating temperature is 900-920 DEG C, heat preservation is conducted for 4-5 h, deformation is phi460-phi320, the strain rate is (0.05-0.10) s<1>, and a forging blank is obtained after the first heating number in a breaking mode; the forging blank is subjected to the second heating number of forging, the heating temperature is 880-900 DEG C, heat preservation is conducted for 3-3.5 h, deformation is phi320-phi200, the strain rate is (0.10-0.25) s<1>, and the forging blank is obtained after the second heating number in a breaking mode; and the forging blank is subjected to the third heating number of forging, the heating temperature is 850-880 DEG C, heat preservation is conducted for 2-2.5 h, deformation is phi200-phi110, the strain rate is (0.05-0.20) s<1>, and a titanium-nickel alloy square billet is obtained in a breaking mode. The method of the low strain rates, the multiple heating numbers and increasing deformation is adopted, forging of the titanium-nickel alloy large cast ingot is achieved, the cracking phenomenon in forging is eliminated, and the good structure and performance of materials are achieved.

The invention discloses a preparation method of a ZTA particle enhanced steel-based composite grinding roller based on chemical activation treatment. The preparation method comprises the following steps: (1) carrying out high temperature salt-bath plating on ZTA particles, and obtaining uniform titanium plated layers on the surfaces of the ZTA particles; (2) forming nickel layers at the peripheries of the titanium plated layers; (3) sintering the plated ZTA particles, and mutually connecting the ZTA particles to form a porous prefabricated part; and (4) fixing the prefabricated part on the end surface or the working surface of a cast, pouring a steel base material metal solution through a casting-penetrating process, and carrying out cooling to obtain the ZTA particle enhanced steel-based composite grinding roller. During the salt-bath titanium plating, titanium and the surfaces of the ZTA ceramic particles form metallurgical bonding, so that the interfacial bonding property between the titanium layers and the ZTA ceramic particles is enhanced. The ZTA ceramic particles subjected to the salt-bath titanium plating is then subjected to chemical nickel plating, and a titanium-nickel alloy can be generated at a titanium-nickel bonding part; and the titanium-nickel alloy layers achieve the effect of a flexible transitional layer between a metal base body and the ZTA particles, so that the bonding strength of the interface is greatly enhanced.