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Low-elastic-modulus high-strength titanium alloy and preparation method thereof

A low elastic modulus, titanium alloy technology, applied in the fields of biomedical materials and sporting goods, can solve problems such as increasing the preparation cost, and achieve the effect of reducing the difficulty of smelting, low elastic modulus, and easy smelting

Active Publication Date: 2013-06-26
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ta is added to the alloy, which increases the preparation cost

Method used

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  • Low-elastic-modulus high-strength titanium alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: Preparation of Ti-18Nb alloy material

[0022] (1) Ti-18Nb alloy, commercially available Ti and Nb pure metals are distributed according to the alloy composition, smelted in a non-consumable vacuum electric arc furnace, and fully stirred to obtain a Ti-18Nb alloy ingot;

[0023] (2) The Ti-18Nb alloy ingot obtained above is subjected to open blank forging after being heat-preserved for 2 hours at 1050° C. for 2 hours, then intermediate forging is carried out, and the temperature is gradually lowered from 1000° C. to 900° C. to forge into an intermediate slab;

[0024] (3) The slab prepared above is subjected to solution treatment at 900°C, and after being kept for 1 hour, cooled at a rate of not lower than 300°C / s to obtain a structure with a certain proportion of martensite phase and residual β phase;

[0025] (4) Cold rolling the above-mentioned solid solution alloy slab with a deformation amount of 75% in air to obtain a Ti-18Nb alloy plate.

[0026] M...

Embodiment 2

[0027] Embodiment 2: Preparation of Ti-18Nb-3Zr alloy material

[0028] (1) Ti-18Nb-3Zr alloy, the commercially available Ti, Nb and Zr pure metals are smelted in a vacuum non-consumable magnetic levitation furnace according to the alloy composition ratio, to obtain Ti-18Nb-3Zr alloy ingots;

[0029] (2) The Ti-18Nb-3Zr alloy ingot prepared above was homogenized at 1080°C for 2.5 hours, then subjected to blank forging, and then intermediate forging, gradually cooling from 1000°C to 900°C, and forging into an intermediate slab ;

[0030] (3) After the above-prepared slab is kept at 850°C for 0.5 hours, it is cooled at a rate not lower than 300°C / s to obtain a structure with a certain proportion of martensite phase and residual β phase;

[0031] (4) Cold rolling the above-mentioned solid solution alloy slab with a deformation amount of 80% in air can obtain a Ti-18Nb-3Zr alloy plate.

[0032] Material properties: According to the national standard GB / T 228-2002 method for tens...

Embodiment 3

[0033] Embodiment 3: Preparation of Ti-18Nb-3Zr-1Hf alloy material

[0034] (1) Ti-18Nb-3Zr-1Hf alloy, the commercially available Ti, Nb, Zr and Hf pure metals are prepared into consumable electrodes according to the alloy composition ratio, and are smelted in a vacuum consumable electric arc furnace to obtain Ti-18Nb - 3Zr-1Hf alloy ingot;

[0035] (2) The Ti-18Nb-3Zr-1Hf alloy ingot prepared above was homogenized at 1100°C for 3 hours, then forged, and then intermediate forged, gradually cooled from 1000°C to 900°C, and forged into an intermediate slab;

[0036] (3) After the slab prepared above is kept at 880°C for 3 hours, it is cooled at a speed not lower than 300°C / s to obtain a structure with a certain proportion of martensite phase and residual β phase;

[0037] (4) The above-mentioned solid solution cold rolling is carried out in the air with a deformation amount of 70% to obtain a Ti-18Nb-3Zr-1Hf plate.

[0038] Material properties: According to the national stand...

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Abstract

The invention discloses a low-elastic-modulus high-strength titanium alloy and a preparation method thereof. The alloy comprises 18 at% of niobium, 0-9 at% of zirconium, 0-9 at% of hafnium and the balance of titanium, wherein the sum of the zirconium and hafnium is 0-9 at%. The preparation method comprises the following steps: smelting in a vacuum consumable / non-consumable arc-melting furnace to obtain a Ti-Nb-Zr(Hf) cast ingot, carrying out homogenizing treatment on the cast ingot, cogging, forging, carrying out intermediate forging, gradually cooling to 900 DEG C from 1000 DEG C to obtain an intermediate plate blank, carrying out solution treatment on the plate blank, and cooling to obtain a structure with orthorhombic martensite phase and residual beta-phase in a certain ratio; and carrying out cold-rolling until the amount of deformation is greater than 60%, thereby obtaining the low-elastic-modulus high-strength titanium alloy plate, of which the elastic modulus is 50-60 GPa, the rolling-direction tensile strength at room temperature exceeds 850 MPa and the elongation percentage is 6-15%. The alloy disclosed by the invention can be widely used in spectacle frames, sports equipment and biomedical devices.

Description

technical field [0001] The invention relates to a low-elastic-modulus high-strength titanium alloy and a preparation method thereof, in particular to a low-elastic-modulus high-strength Ti-Nb-Zr(Hf) alloy material and a preparation method thereof, belonging to the fields of sporting goods and consumer goods and biomedical materials. Background technique [0002] Titanium alloy has good biocompatibility and anti-antibody corrosion performance, and its elastic modulus is about 80-110GPa, which is the closest to human tissue (10-30GPa), which can reduce the incompatibility between metal implants and bone tissue , have been widely used in biomedical and other fields. At present, the most widely used titanium alloys clinically are still pure titanium and Ti-6Al-4V alloy, but the elastic modulus of Ti-6Al-4V alloy is high (about 110GPa), and it is believed that Al element can cause osteomalacia, and V is also Biologically toxic. Based on this, people have specially developed ti...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02C22F1/18
Inventor 宋晓云叶文君惠松骁于洋刘睿付艳艳米绪军
Owner GRIMAT ENG INST CO LTD
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