Preparation method of medical titanium alloy ingot with low elastic modulus

A low elastic modulus, titanium alloy technology, applied in the field of medical biological titanium alloy preparation, can solve the problems of difficult alloy preparation, segregation of tantalum and niobium elements, too large difference in melting point and density, and avoid uneven mixing and distribution. uniform effect

Active Publication Date: 2020-01-10
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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  • Summary
  • Abstract
  • 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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  • Preparation method of medical titanium alloy ingot with low elastic modulus
  • Preparation method of medical titanium alloy ingot with low elastic modulus
  • Preparation method of medical titanium alloy ingot with low elastic modulus

Examples

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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

The invention provides a preparation method of a medical titanium alloy ingot with low elastic modulus. The preparation method comprises the following steps: according to the mass percentage of each element in TiNbTaZr alloy, calculating the weight of a Ta plate, the weight of a Ti plate, the weight of a Zr plate and the weight of a Nb plate, and cutting each of the Ta plate, the Ti plate, the Zrplate and the Nb plate into battens with the same length and width; placing the Ta battens in the middle, and sequentially placing the Nb battens, the Zr battens and the Ti battens on two sides of theTa battens; and assembling and welding the arranged battens into consumable electrodes, and then melting the consumable electrodes for three times. By utilizing the characteristic that electric arc is maintained between two points with the shortest distance between two poles, after low-melting-point raw materials on the same cross section are melted in a melting process, the electric arc can be transferred to unmelted high-melting-point raw materials until the high-melting-point raw materials and the low-melting-point raw materials are on the same plane, the electric arc can be transferred tothe low-melting-point raw materials to be continuously melted, and the influence on the uniformity of chemical components due to different melting speeds of the raw materials is reduced.

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 Applications(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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