Moderate strength flexible narrow lag NiTiWCu quaternary alloy and preparation method and application thereof

A quaternary alloy, narrow hysteresis technology, applied in the field of nickel alloys, can solve the problem of wide stress hysteresis, and achieve the effect of narrow stress hysteresis, low elastic modulus and good processing performance

Active Publication Date: 2015-07-01
GRINM MEDICAL INSTR BEIJING CO LTD +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The upper plateau strength of the common nickel-titanium alloy superelastic hysteresis curve is higher, often close to 600MPa, while the lower plateau strength is lower, often lower than 200MPa or lower, resulting in a strength difference of more than 300MPa between the upper and lower plateaus, and a wide stress hysteresis.

Method used

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  • Moderate strength flexible narrow lag NiTiWCu quaternary alloy and preparation method and application thereof
  • Moderate strength flexible narrow lag NiTiWCu quaternary alloy and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Using sponge titanium, electrolytic nickel, tungsten-titanium alloy, pure copper plate, tungsten-nickel alloy as raw materials, the total weight is 27 kg, and the design masses of each component are: tungsten (W): 2.835 kg, Cu: 0.175 kg, nickel ( Ni): 13.407 kg, titanium (Ti): 10.583 kg. A 2.3 kg electrode is pressed and melted into a cylindrical ingot through a vacuum induction furnace. The vacuum used for melting is not greater than 7Pa. The chemical composition of the ingot was tested after smelting. The actual measured tungsten weight percentage was 10.5%, copper weight percentage was 0.7%, nickel weight percentage was 49.80%, oxygen weight percentage was 0.033%, carbon weight percentage was 0.026%, and silicon weight percentage was 0.03%. , the weight percentage of iron is 0.032%, and the weight percentage of other elements is less than 0.025%. The weight percentage of titanium is the balance. After ingot homogenization and heat preservation at 1000°C for 60 minu...

Embodiment 2

[0026] Using sponge titanium, electrolytic nickel, pure copper plate, tungsten-titanium alloy, tungsten-nickel alloy as raw materials, the total weight is 27 kg, and the design masses of each component are: tungsten (W): 0.432 kg, Cu: 0.095 kg, nickel ( Ni): 14.973 kg, Titanium (Ti): 11.500 kg. A 2.3 kg electrode is pressed and melted into a cylindrical ingot through a vacuum induction furnace. The vacuum used for melting is not greater than 7Pa. The chemical composition of the ingot was tested after smelting. The actual measured tungsten weight percentage was 1.7%, copper weight percentage was 0.4%, nickel weight percentage was 55.5%, oxygen weight percentage was 0.043%, carbon weight percentage was 0.027%, and silicon weight percentage was 0.028%. , the weight percentage of iron is 0.03%, and the weight percentage of other elements is less than 0.025%. The weight percentage of titanium is the balance. After the ingot is homogenized and held at 850°C for 240 minutes, it is ...

Embodiment 3

[0028]Using sponge titanium, pure nickel plate, tungsten-titanium alloy, pure copper plate, tungsten-nickel alloy as raw materials, the total weight is 27 kg, and the design masses of each component are: tungsten (W): 0.189 kg, Cu: 0.257 kg, nickel (Ni): 14.782 kg, titanium (Ti): 11.772 kg. A 2.3 kg electrode is pressed and melted into a cylindrical ingot through a vacuum induction furnace. The vacuum used for melting is not greater than 7Pa. The chemical composition of the ingot was tested after smelting. The actual measured tungsten weight percentage was 0.66%, copper weight percentage was 0.95%, nickel weight percentage was 54.8%, oxygen weight percentage was 0.04%, carbon weight percentage was 0.027%, and silicon weight percentage was 0.028%. , the weight percentage of iron is 0.03%, and the weight percentage of other elements is less than 0.025%. The weight percentage of titanium is the balance. After the ingot is homogenized and kept at 950°C for 120 minutes, it is for...

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Abstract

The invention relates to a moderate strength flexible narrow lag NiTiWCu quaternary alloy and a preparation method and application thereof. The alloy comprises the following chemical components by weight: 0.55%-10.5% of W, 0.3%-0.95% of Cu, and balance of Ni and Ti, and the Ni and Ti atom ratio is 1.024-1.072. The compositely modified quaternary alloy has moderate yield strength approximate to the ordinary nickel titanium alloy yield strength, the elastic modulus is lower than that of the ordinary nickel titanium alloy, the quaternary alloy has good mechanical compatibility and good processing performance, and cold and hot processing performances are slightly better than that of the ordinary nickel titanium alloy. The product made of the alloy can be widely used in medical appliances and sporting goods and other fields, and can be used as super elastic brackets, orthodontic tooth arch wires, implantation instruments of orthopedics, and the like, and the arch wire product made of the alloy also has the advantages of flexibility and narrow lag.

Description

technical field [0001] The invention belongs to the technical field of nickel alloys, and in particular relates to a NiTiWCu quaternary alloy with medium-strength flexible narrow hysteresis and a preparation method and application thereof with low difference between the strength of the upper platform and the strength of the lower platform. Background technique [0002] Nitinol has good mechanical properties and excellent fatigue properties, wear resistance and corrosion resistance. Nitinol has three unique functional characteristics, namely superelasticity, shape memory and damping properties. Nitinol also has Has excellent biocompatibility. Therefore, it has been widely used in aviation, aerospace, ships and medical equipment and other fields. In the field of medical devices, stainless steel has been widely replaced as a metal material for human implants, and it has been widely used clinically. Nitinol is used in vascular stents, various non-vascular stents, spinal correc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03A61C7/20A61B17/56A61F2/82
Inventor 袁志山朱明石世威崔立山周瑾缪卫东李君涛王胜难王江波冯昭伟
Owner GRINM MEDICAL INSTR BEIJING CO LTD
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