CN101353740A - High-modulus non-toxic titanium alloy for restorative dentistry and preparation method thereof - Google Patents

Abstract

The invention discloses a high-modulus nontoxic titanium alloy used for dental restoration and a preparation method thereof, pertaining to the medical alloy material technology. The titanium alloy consists of 5 to 15 percent of zirconium, 5 to 20 percent of niobium and 2 to 10 percent of tin, and the rest is titanium. The preparation process comprises the following steps: tin particles, titanium sponge, zirconium sponge and niobium are in sequence put into a crucible according to the mass ratio of (2-10): (55-88): (5-15): (5-20), smelted into cast ingots in a vacuum non-consumable electrode arc furnace, and the smelted ingots are plastic formed and molded; after that, the titanium alloy is heat-treated for vacuum aging; and finally, the surface of the prepared titanium alloy is cleaned. The high-modulus nontoxic titanium and the preparation method thereof of the invention have the advantages that: as Nb, Zr and Sn with non-toxicity and excellent biological performance are used as the added elements for the titanium alloy, the prepared titanium alloy has superior mechanical performance and good ingot casting performance, and can meet the performance requirements of high modulus and high tensile strength for dental restoration.

Description

Be used for high modulus nontoxic titanium alloy of dental repair and preparation method thereof

Technical field:

The present invention relates to a kind of high modulus nontoxic titanium alloy that is used for dental repair and preparation method thereof, belong to the medical alloy material technology.

Background technology:

Titanium and alloy thereof are widely used in medical fields such as plastic surgery, plantation and Oral Repair with its favorable mechanical performance, solidity to corrosion and excellent biocompatibility.Mainly be pure titanium and Ti-6Al-4V alloy at present in the widespread use of Oral Repair field.Yet after clinical observation for many years, titanium and Ti-6Al-4V alloy are applied to Oral Repair and all have its certain limitation.Pure titanium tensile strength is low, and wear resistance is relatively poor, and it is slightly inadequate to be used for removable denture reparation mechanical property, and it is undesirable to be used for fixing the artificial tooth wear resistance.Ti-6Al-4V also is the medical titanium alloy of using always, Ti-6Al-4V tensile strength is 965MPa, Young's modulus reaches 110GPa, satisfy artificial tooth and repair requirement, but facts have proved that the Ti-6Al-4V biocompatibility is relatively poor, can separate out the Al and the V element of trace in the life-time service process, V has very strong cytotoxicity, and Al is relevant with the generation of Alzheimer ' s disease.

The needed performance of ideal used for stomatological repair titanium alloy comprises: better biocompatibility, higher modulus of elasticity, suitable hardness, plasticity, good crocking resistance preferably, good casting fluidity etc. are to adapt to the needs of oral repairing clinic and skilled worker chamber operation.At present, Chinese scholars has been made a large amount of work in stomatology aspect titanium alloy, but research work is mainly concentrated low modulus to implant and is used beta titanium alloy, can not satisfy of the requirement of clinical used for stomatological repair titanium alloy to mechanical propertys such as high elastic coefficient, perhaps contain Al, Mo and etc. poisonous element make its biocompatibility poor.

In view of this, the present invention is now proposed on the basis of scientific experimentation.

Summary of the invention:

The present invention seeks to be to provide a kind of high modulus nontoxic titanium alloy that is used for dental repair and preparation method thereof, this titanium alloy is nontoxic, high strength, high-modulus, anti-corrosion, easy machine-shaping and good biocompatibility, and its preparation method is simple.

The present invention is realized that by the following technical programs a kind of high modulus nontoxic titanium alloy that is used for dental repair is characterized in that, this titanium alloy is made up of the quality percentage composition of following component and each component thereof: zirconium (Zr): 5-15%; Niobium (Nb): 5-20%; Tin (Sn): 2-10%, surplus is titanium (Ti), the quality percentage composition sum of each component is 100%.

The preparation method of this alloy is characterized in that comprising following process:

(1) with quality 99.5-99.99% tin grain, quality 99.5-99.99% titanium sponge, quality 99.5-99.99% zirconium sponge and quality 99.5-99.99% niobium, presses mass ratio (2-10): (55-88): (5-15): (5-20), put into crucible successively; In vacuum non-consumable arc furnace, vacuum tightness is 10^-1-10^-3Pa, working current 500-800A, operating voltage are 10-20V, arcing time 1-2 minute, carry out being smelted into ingot casting 3-4 time.

(2) ingot casting after the melting is placed High Temperature Furnaces Heating Apparatus, after 1050 ℃-1200 ℃ of temperature are incubated 10-15 minute down, come out of the stove and carry out cogging.Through the plastic working moulding, the alloy of machine-shaping being placed vacuum oven 800 ℃-900 ℃ of temperature, is 10 in vacuum tightness^-2-10^-5Pa carries out vacuum aging thermal treatment under 500 ℃-600 ℃ of the temperature, and soaking time is 0-4 hour.Adopting deionized water or ultrasonic cleaning that prepared alloy is carried out cleaning surfaces handles.

The invention has the advantages that selected Nb, Zr and Sn nontoxic and that biology performance is good to add element as titanium alloy, prepared alloy biocompatibility is good.Simultaneously, this alloy mechanical performance is good, alloy strength is close with Ti6Al4V alloy modulus greater than 100GPa up to 800-900MPa, Young's modulus, cast ingot machine-shaping is good and have higher toughness plasticity unit elongation greater than 8%, can satisfy tooth section and repair high-modulus and high-tensile performance requriements.

Embodiment

Embodiment 1:

With quality 99.9% tin grain 1.0g, quality 99.9% titanium sponge 30.1g, quality 99.9% zirconium sponge 5.1g and quality 99.9% niobium 4.0g, add successively in the crucible, be 10 in vacuum tightness^-2Pa, working current 600A, operating voltage is 13V, arcing time 2 minutes carries out 4 melt backs and finally is prepared into ingot casting.With the ingot casting after the melting 1200 ℃ down insulation carry out cogging after 10 minutes, at 900 ℃ through the plastic working moulding.The gained alloy is carried out vacuum aging handle under 580 ℃, soaking time is 2 hours.Adopt the deionized water clean surface.The alloy mechanical property that records present embodiment according to standard GB 6397-8 is shown in Table 1.

Gained alloy mechanical property among table 1 embodiment 1

Embodiment 2:

With quality 99.9% tin grain 1.0g, quality 99.9% titanium sponge 29.1g, quality 99.9% zirconium sponge 6.1g and quality 99.9% niobium 4.0g, add successively in the crucible, be 10 in vacuum tightness^-1Pa, working current 800A, operating voltage is 10V, arcing time 1 minute carries out 4 melt backs and finally is prepared into ingot casting.With the ingot casting after the melting 1200 ℃ of temperature down insulation carry out cogging after 10 minutes, 900 ℃ of temperature through the plastic working moulding.The gained alloy is carried out vacuum aging handle under 580 ℃ of temperature, soaking time is 2 hours.Adopt the deionized water clean surface.

Embodiment 3:

With quality 99.9% tin grain 4g, quality 99.9% titanium sponge 27g, quality 99.9% zirconium sponge 5g and quality 99.9% niobium 4.0g, add successively in the crucible, be 10 in vacuum tightness^-2Pa, working current 750A, operating voltage is 11V, arcing time 1 minute carries out 4 melt backs and finally is prepared into ingot casting.With the ingot casting after the melting 1050 ℃ of temperature down insulation carry out cogging after 13 minutes, 800 ℃ of temperature through the plastic working moulding.The gained alloy is carried out vacuum aging handle under 500 ℃ of temperature, soaking time is 3 hours.Adopt the deionized water clean surface.

Embodiment 4:

With quality 99.9% tin grain 1.0g, quality 99.9% titanium sponge 28g, quality 99.9% zirconium sponge 5g and quality 99.9% niobium 6g, add successively in the crucible, be 10 in vacuum tightness^-3Pa, working current 500A, operating voltage is 20V, arcing time 2 minutes carries out 4 melt backs and finally is prepared into ingot casting.With the ingot casting after the melting 1100 ℃ of temperature down insulation carry out cogging after 15 minutes, 850 ℃ of temperature through the plastic working moulding.The gained alloy is carried out vacuum aging handle under 600 ℃ of temperature, soaking time is 4 hours.Adopt the ultrasonic cleaning clean surface.

Claims (2)

Translated fromChinese

1.一种用于修复齿科的高模量无毒钛合金，其特征在于，该钛合金由以下组分及其各组分的质量百分含量组成：锆：5-15％；铌：5-20％；锡：2-10％，余量为钛，各组分的质量百分含量之和为100％。1. A high-modulus non-toxic titanium alloy for dental restoration, characterized in that the titanium alloy consists of the following components and the mass percentages of each component thereof: zirconium: 5-15%; niobium: 5-20%; tin: 2-10%, the balance is titanium, and the sum of the mass percentages of each component is 100%.2.一种权利要求1所述的用于修复齿科的高模量无毒钛合金的制备方法，其特征在于包括以下过程：2. a method for preparing a high-modulus non-toxic titanium alloy for restoration of dentistry as claimed in claim 1, characterized in that it comprises the following process:(1)将质量99.5-99.99％锡粒、质量99.5-99.99％海绵钛、质量99.5-99.99％海绵锆和质量99.5-99.99％铌，按质量比(2-10)∶(55-88)∶(5-15)∶(5-20)，依次放入坩锅中；在真空非自耗电弧炉中，真空度为10-1-10-3Pa、工作电流500-800A、工作电压为10-20V、起弧时间1-2分钟，进行3-4次熔炼成铸锭；(1) With mass 99.5-99.99% tin particles, mass 99.5-99.99% titanium sponge, mass 99.5-99.99% sponge zirconium and mass 99.5-99.99% niobium, by mass ratio (2-10): (55-88): (5-15): (5-20), put them into the crucible in turn; in the vacuum non-consumable electric arc furnace, the vacuum degree is 10-1-10-3Pa, the working current is 500-800A, and the working voltage is 10 -20V, arc start time 1-2 minutes, smelting into ingots 3-4 times;(2)将熔炼后的铸锭置于高温炉中，在温度1050℃-1200℃下保温10-15分钟后出炉进行开坯，在温度800℃-900℃经塑性加工成型，将加工成型的合金置于真空炉中，在真空度为10^-2-10^-5Pa，温度500℃-600℃下进行真空时效热处理，保温时间为0-4小时，采用去离子水或超声清洗对所制备钛合金进行表面清洁处理。(2) Place the smelted ingot in a high-temperature furnace, hold it at a temperature of 1050°C-1200°C for 10-15 minutes, and then take it out of the furnace to open the billet. Plastic processing is performed at a temperature of 800°C-900°C. The alloy is placed in a vacuum furnace, and the vacuum aging heat treatment is carried out at a vacuum degree of 10^-2 -10^-5 Pa and a temperature of 500°C-600°C. The holding time is 0-4 hours. The prepared alloy is cleaned with deionized water or ultrasonic cleaning Titanium alloy for surface cleaning.