High-strength high-elasticity titanium alloy and preparation method thereof

A titanium alloy, high-strength technology, applied in the field of high-strength and high-elasticity titanium alloys and preparation, can solve the problems of not reaching high strength, low alloy elongation, affecting alloy processing performance and fatigue performance, etc. Simple controllable, good elongation effect

Active Publication Date: 2019-07-05
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] This kind of medical titanium alloy also has the potential to be used as a high-performance elastic material after strengthening treatment, but there are still some problems: ① The elastic modulus of the alloy in the solid solution state (composed of β phase) can be reduced to 55-65GPa, but Its yield strength also decreas

Method used

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  • High-strength high-elasticity titanium alloy and preparation method thereof
  • High-strength high-elasticity titanium alloy and preparation method thereof
  • High-strength high-elasticity titanium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Ball milling process of titanium powder: a planetary ball mill is used, and its ball milling tank and balls are made of 0Cr18Ni9 stainless steel. Put titanium powder with a particle size of 10 μm into a ball mill jar, fill it with absolute ethanol, and then ball mill it. The parameters of ball milling are: the weight ratio of balls to titanium powder is 10:1, the rotation speed is 300r / min, and the forward and reverse time is 2h;

[0042] (2) The preparation process of sintered titanium: the titanium powder after ball milling is dried naturally, put into graphite mold, and then sintered by SPS. 30min, the sintering pressure is 50MPa. According to ICP analysis, the sintered titanium contains Fe: 0.171wt%; Cr: 0.073wt%; Ni: 0.022wt%, and the rest is titanium. Divide the titanium sintered block into flakes.

[0043] (3) Raw material configuration and arc melting: the weight of each component is: flaky sintered titanium 22g; sponge titanium: 50g; Nb: 30g; Zr: 6g; Mo:...

Embodiment 2

[0049] (1) Ball milling process of titanium powder: a planetary ball mill is used, and its ball milling tank and balls are made of 0Cr18Ni9 stainless steel. Put titanium powder with a particle size of 5 μm into a ball mill jar, fill it with absolute ethanol, and then perform ball milling. The parameters of the ball mill are: the weight ratio of the ball to the titanium powder is 10:1, the rotation speed is 250r / min, and the forward and reverse time is 3h;

[0050] (2) The preparation process of sintered titanium: the titanium powder after ball milling is dried naturally, put into graphite mold, and then sintered by SPS. 15min, the sintering pressure is 60MPa. According to ICP analysis, the sintered titanium contains Fe: 0.251wt%; Cr: 0.105wt%; Ni: 0.032wt%, and the rest is titanium. Divide the titanium sintered block into flakes.

[0051] (3) Raw material configuration and arc melting: the weight of each component is: flaky sintered titanium 35g; sponge titanium: 36g; Nb: 3...

Embodiment 3

[0056] (1) Ball milling process of titanium powder: a planetary ball mill is used, and its ball milling tank and balls are made of 0Cr18Ni9 stainless steel. Put titanium powder with a particle size of 15 μm into a ball mill jar, fill it with absolute ethanol, and then ball mill it. The parameters of the ball mill are: the weight ratio of the ball to the titanium powder is 10:1, the rotation speed is 200r / min, and the forward and reverse time is 4h;

[0057] (2) The preparation process of sintered titanium: the titanium powder after ball milling is dried naturally, put into graphite mold, and then sintered by SPS. 20min, the sintering pressure is 50MPa. According to ICP analysis, the sintered titanium contains Fe: 0.204wt%; Cr: 0.081wt%; Ni: 0.022wt%, and the rest is titanium. Divide the titanium sintered block into flakes.

[0058] (3) Raw material configuration and arc smelting: the weight of each component is: 30g of flake sintered titanium; sponge titanium: 42g; Nb: 31g;...

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Abstract

The invention relates to a high-strength high-elasticity titanium alloy and a preparation method thereof. The alloy comprises the following components of, in percentage by weight, 30%-32% of Nb, 4%-6%of Zr, 2%-3% of Mo, 0.038%-0.088% of Fe; 0.016%-0.037% of Cr, 0.005%-0.011% of Ni and the balance titanium; the preparation method of the alloy comprises the following specific steps of carrying outmechanical ball milling on titanium powder and absolute ethyl alcohol in a ball milling tank and a ball milling system composed of 0Cr18Ni9, and then performing SPS sintering on the titanium powder toobtain titanium sintering block containing trace Fe, Cr and Ni oxides; smelting flaky sintered titanium, titanium sponge, Nb, Zr and Mo raw materials in an electric arc furnace to obtain an alloy ingot; carrying out hot forging on the cast ingot into a bar material and carrying out solid solution treatment, and then carrying out cold rolling deformation processing; and finally, carrying out agingheat treatment, so that the alpha phase with the extremely fine nanometer size is separated out from a beta-precipitation matrix body. The obtained titanium alloy has high strength and high elastic performance, is low in elasticity modulus and high in elongation rate, is very suitable for manufacturing high-elasticity parts in the fields of aerospace, machinery and the like, and can also be applied to the preparation of biomedical implants.

Description

technical field [0001] The invention relates to a high-strength and high-elasticity titanium alloy and a preparation method thereof, and belongs to the technical field of design and preparation of titanium alloy materials. Background technique [0002] The main characteristic parameters of elastic metal materials are the tensile strength σ b , Yield strength σ 0.2 , elastic modulus E and elastic strain limit, where the elastic strain limit can be approximated by σ 0.2 Ratio to E (σ 0.2 / E) to represent. σ b Larger means that it can work under higher stress; σ 0.2 The larger the / E, the stronger the elastic deformation ability, that is, the elastic parts can be made smaller and lighter under the same stress level. Due to the high strength of titanium alloy, the elastic modulus and density are only 50% and 60% of steel, respectively, and the elastic deformation capacity is about twice that of steel, so it is very suitable for use as a lightweight high-performance elastic...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/04B22F3/105C22B9/20C22F1/18C22F1/02
CPCB22F3/105B22F2003/1051C22B9/20C22C1/0458C22C14/00C22F1/02C22F1/183Y02P10/25
Inventor 陈锋吴宇龙武祥为
Owner SOUTHEAST UNIV
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