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Preparation method of Ni-Ti-Cu alloy tooth arch wires

A technology of ni-ti-cu and dental arch wire, applied in the direction of arch wire, etc., can solve the unfavorable stability of NiTi dental arch wire products, achieve enhanced phase change cycle behavior, increase yield strength difference, and reduce raw material costs Effect

Inactive Publication Date: 2017-09-08
广州市帕菲克义齿科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the phase transition temperature of NiTi alloy is very sensitive to the Ni content, and the Ni content changes by 0.1 at%, and the martensitic reverse transformation termination temperature is A f It will change by 10-20°C, which is extremely unfavorable to the product stability of NiTi dental arch wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Using sponge titanium, electrolytic nickel, and electrolytic copper powder as raw materials, the total weight is 5 kg, and the design masses of each component are: titanium: 2.177 kg, nickel: 2.51 kg, and copper: 0.313 kg. In the raw materials, carbon is 0.05%, hydrogen is 0.005%, oxygen is 0.05%, and nitrogen is 0.05%. The raw materials are mixed and pressed into a 5 kg electrode, which is smelted into a cylindrical ingot through a secondary vacuum consumable electric arc furnace, and the smelting vacuum degree is not less than 10 -2 Pa, the current is in the range of 900A to 500A, and the voltage is 30 to 40V. The ingot is forged and bloomed at 1000°C for 230 minutes. Then, it is forged step by step at 900°C to form a round bar with a diameter of 28 mm. Then, it is rolled at 900°C to form a thick wire with a diameter of 4 mm. Afterwards, it is drawn at 700°C with a drawing speed of 0.7m / s and a single pass deformation of 10%. After a series of drawing, a filament wit...

Embodiment 2

[0017] Using sponge titanium, electrolytic nickel, and electrolytic copper powder as raw materials, the total weight is 5 kg, and the design masses of each component are: titanium: 2.177 kg, nickel: 2.51 kg, and copper: 0.313 kg. In the raw materials, carbon is 0.05%, hydrogen is 0.005%, oxygen is 0.05%, and nitrogen is 0.05%. The raw materials are mixed and pressed into a 5 kg electrode, which is smelted into a cylindrical ingot through a secondary vacuum consumable electric arc furnace, and the smelting vacuum degree is not less than 10 -2 Pa, the current is in the range of 900A to 500A, and the voltage is 30 to 40V. The ingot is forged and bloomed at 1000°C for 230 minutes. Then, it is forged step by step at 900°C to form a round bar with a diameter of 28 mm. Then, it is rolled at 900°C to form a thick wire with a diameter of 4 mm. Afterwards, it is drawn at 700°C, the drawing speed is 0.7m / s, the deformation per pass is 10%, and after a series of drawing, a filament with ...

Embodiment 3

[0019] Using sponge titanium, electrolytic nickel, and electrolytic copper powder as raw materials, the total weight is 5 kg, and the design masses of each component are: titanium: 2.177 kg, nickel: 2.51 kg, and copper: 0.313 kg. In the raw materials, carbon is 0.05%, hydrogen is 0.005%, oxygen is 0.05%, and nitrogen is 0.05%. The raw materials are mixed and pressed into a 5 kg electrode, which is smelted into a cylindrical ingot through a secondary vacuum consumable electric arc furnace, and the smelting vacuum degree is not less than 10 -2 Pa, the current is in the range of 900A to 500A, and the voltage is 30 to 40V. The ingot is forged and bloomed at 1000°C for 230 minutes. Then, it is forged step by step at 900°C to form a round bar with a diameter of 28 mm. Then, it is rolled at 900°C to form a thick wire with a diameter of 4 mm. Afterwards, it is drawn at 700°C, the drawing speed is 0.7m / s, and the deformation per pass is 10%. After a series of drawing, a filament with ...

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Abstract

The invention discloses a preparation method of Ni-Ti-Cu alloy tooth arch wires. The material of the tooth arch wires is a Ni-Ti-Cu alloy and comprises, by weight, 50.14% of Ni, 43.54% of Ti and 6.26% of Cu. Ni-Ti-Cu cast ingots are prepared by adoption of vacuum self-consuming electric arc smelting, and then forging, rolling, wire drawing and sizing are conducted to prepare the Ni-Ti-Cu tooth arch wires. The method has the advantages that stress needed by martensite phase variant reorientation is low, thus martensite variant reorientation is easily conducted, and deformation stress or the yield strength under the martensite state is lowered; through adding of the Cu, the yield strength of a base phase B2 can be improved, so that the yield strength difference of the base phase and a martensite phase is increased, and phase change cyclic behavior of the base phase is reinforced; the Ni-Ti-Cu alloy is small in super-elasticity stress lagging and thus is a good super-elasticity material; and in Ni-Ti-Cu, the content of the Cu is, by atom percentage, 5-10% so as to replace Ni, and the raw material cost can further be greatly reduced.

Description

Technical field [0001] The invention relates to a method for preparing dental arch wires, in particular to a method for preparing Ni-Ti-Cu alloy dental arch wires. Background technique [0002] Fixed appliances are the most widely used in orthodontic clinics around the world, and the arch wire is the main functional part of the appliance. In the process of correction, it is precisely through the correction of the archwire that the continuous and certain elastic force is generated during the deformation process to control the movement of the teeth, so as to achieve the purpose of correction. It can be seen that the correcting arch wire material has a very important influence on the process and effect of orthodontics. Therefore, the research and development of new arch wire materials that meet the clinical needs of orthodontics have become the common task of orthodontic clinicians and materials scientists. At present, the main orthopedic wires used in the market are stainless ste...

Claims

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Application Information

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IPC IPC(8): C22C19/03C22C1/02C22F1/10A61C7/20
CPCC22C19/03A61C7/20C22C1/02C22F1/002C22F1/10
Inventor 彭金东
Owner 广州市帕菲克义齿科技有限公司
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