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A kind of preparation method of low elastic modulus medical titanium alloy ingot

A low elastic modulus, titanium alloy technology, applied in the field of medical bio-titanium alloy preparation, can solve the problems of difficulty in ensuring the accuracy and uniformity of alloy composition, segregation of tantalum and niobium elements, and difficulty in alloy preparation, so as to avoid high melting point Effect of element segregation and uniform distribution

Active Publication Date: 2021-10-15
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to the large difference in melting point and density of Ti, Nb, Ta, and Zr elements, it brings certain difficulties to the preparation of the alloy. The tantalum and niobium elements in the TiNbTaZr alloy prepared by the traditional process are seriously segregated, and the accuracy and uniformity of the alloy composition hard to guarantee

Method used

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  • A kind of preparation method of low elastic modulus medical titanium alloy ingot
  • A kind of preparation method of low elastic modulus medical titanium alloy ingot
  • A kind of preparation method of low elastic modulus medical titanium alloy ingot

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preparation example Construction

[0026] A method for preparing a low elastic modulus medical titanium alloy ingot, the steps are as follows:

[0027] Step 1: Prepare raw materials. First, prepare different thickness plates or foils according to the melting point of Ti plate, Zr plate, Nb plate, and Ta plate. The thickness of Ta plate (foil) is required to be ≤1mm; Ti plate, Zr plate, and Nb plate (Foil) has a thickness of 1 to 6 mm.

[0028] Step 2: Calculate the weight of the required plate according to the ratio weight of each element in the TiNbTaZr alloy, and cut the plate into strips of the same length and width.

[0029] Step 3: arrange the slats prepared in step 2 in a cross-arrangement, requiring Ta boards to be placed in the middle, and arrange Nb boards, Zr boards, and Ti boards in sequence on both sides of the Ta boards.

[0030] Step 4: Clamp the sheets arranged in step 3 with a fixture, and assemble and weld them in a vacuum plasma welding box to form a consumable electrode.

[0031] Step 5: Pr...

Embodiment 1

[0038] Taking the preparation of Ti35Nb2Ta3Zr alloy as an example, feeding 60kg, using a vacuum consumable electric arc furnace with a maximum feeding capacity of 100kg for melting, the preparation steps are as follows:

[0039] Step 1: After calculation, it is necessary to prepare 4 consumable electrodes for the preparation of Ti35Nb2Ta3Zr alloy. The required plates are as follows: Ti plate size 4×60×750mm, 44 pieces in total, weight 35.6kg; Nb plate size 1.3×60×750mm, A total of 44, weighing 21.6kg; Ta foil size 0.4×60×750mm, a total of 4 pieces, weighing 1.2kg; Zr plate size 1.6×60×750mm, a total of 4 pieces, weighing 1.88kg.

[0040] Step 2: Prepare the required plates according to the calculation results of Step 1.

[0041] Step 3: The plates prepared in step 2 are divided into 4 parts, each part includes 11 Ti plates, 11 Nb plates, 1 Ta foil, and 1 Zr plate. Arrange the divided sheets in the following way: put the Ta foil in the middle, place the Nb, Zr and Ti boards in...

Embodiment 2

[0052] Taking the preparation of Ti36Nb5Ta7Zr alloy as an example, feeding 60kg, using a vacuum consumable electric arc furnace with a maximum feeding capacity of 100kg for melting, the preparation steps are as follows:

[0053] Step 1: After calculation, two consumable electrodes are required to prepare Ti36Nb5Ta7Zr alloy. The required plates are as follows: Ti plate size 3.5×60×750mm, 44 pieces in total, weight 31.2kg; Nb plate size 1.3×60×750mm, A total of 44, weighing 21.6kg; Ta foil size 0.5×60×750mm, a total of 8 pieces, weighing 3kg; Zr plate size 1.8×60×750mm, a total of 8 pieces, weighing 4.2kg.

[0054] Step 2: Prepare the required plates according to the calculation results of Step 1.

[0055] Step 3: The plates prepared in step 2 are equally divided into 4 parts, and each part includes 11 Ti plates, 11 Nb plates, 2 Ta foils, and 2 Zr plates. Arrange the divided sheets in the following way: put the Ta foil in the middle, place the Zr board, Nb board and Ti board in...

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Abstract

A method for preparing a low elastic modulus medical titanium alloy ingot, according to the mass percentage of each element in the TiNbTaZr alloy, calculate the weight of Ta plate, Ti plate, Zr plate and Nb plate, and each Ta plate, Ti plate, Zr plate and Nb boards are cut into slats of the same length and width; the Ta slats are placed in the middle, and the Nb slats, Zr slats and Ti slats are placed in sequence on both sides of the Ta slats; the arranged The plates are assembled and welded into consumable electrodes, and then smelted three times. The present invention utilizes the characteristic that the electric arc is maintained between the two points with the shortest distance between the two poles. During the smelting process, after the raw material with low melting point on the same cross-section is melted, the arc will be transferred to the unmelted high melting point raw material until the high melting point raw material and the When the low-melting-point raw materials are on the same plane, the arc will be transferred to the low-melting-point raw materials to continue melting, reducing the influence of different melting speeds on the uniformity of chemical composition.

Description

technical field [0001] The invention belongs to the technical field of medical bio-titanium alloy preparation, and relates to a method for preparing a medical titanium alloy ingot with a low elastic modulus. Background technique [0002] TiNbTaZr alloy is a β-type titanium alloy with good biocompatibility, non-toxic and non-magnetic, and has an elastic modulus similar to that of human bone. It is one of the most suitable biomaterials for human implantation. Its uses include Artificial joints, human bones, dentures, braces, etc. [0003] Due to the large difference in melting point and density of Ti, Nb, Ta, and Zr elements, it brings certain difficulties to the preparation of the alloy. The tantalum and niobium elements in the TiNbTaZr alloy prepared by the traditional process are seriously segregated, and the accuracy and uniformity of the alloy composition Difficult to be guaranteed. In order to improve the alloying effect and obtain alloys with uniform chemical composit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C14/00C22C30/00
CPCC22C1/02C22C14/00C22C30/00
Inventor 周中波焦勇韩彤张利军白钰
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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