CN104480349A - Biomedical Ti-Ni-Cu-Co four-element shape memory alloy - Google Patents
Biomedical Ti-Ni-Cu-Co four-element shape memory alloy Download PDFInfo
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- CN104480349A CN104480349A CN201410813918.8A CN201410813918A CN104480349A CN 104480349 A CN104480349 A CN 104480349A CN 201410813918 A CN201410813918 A CN 201410813918A CN 104480349 A CN104480349 A CN 104480349A
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Abstract
A biomedical Ti-Ni-Cu-Co four-element shape memory alloy is characterized by comprising four elements in percentage by weight as follows: 45-55% of Ni, 1-10% of Cu, 0.1-3% of Co and the balance of Ti. The shape memory alloy is formed by vacuum induction melting, materials in forms of plates, rods, wires and the like are prepared through cold or hot working and heat treatment, the shape memory alloy has lower loading platform stress and narrow stress lag, the loading platform stress is about 300-350 MPa, the stress lag is about 200-250 MPa, and the shape memory alloy has good superelasticity at the human body temperature and is more suitable for medical use.
Description
Technical field
The present invention relates to and a kind of there is low weighted platform stress, narrow Stress resort and elastic performance is good under human body temperature the Ni-based shape memory alloy of titanium.Specifically, be a kind of bio-medical Ti-Ni-Cu-Co quaternary shape memory alloy.
Background technology
Ti-Ni marmem is owing to having shape memory effect and associated super-elasticity and high damping characteristic, its range of application has designed the fields such as space flight, aviation, building, biomedicine and daily life, is particularly widely used at biomedical sector.Mainly there is the problems such as weighted platform stress is large, Stress resort large and super-elasticity produces temperature is lower at present conventional titanium nickel binary alloy.Weighted platform stress causes greatly needing larger power just Ti-Ni alloy medical product can be seated to desired location over the course for the treatment of.Stress resort makes greatly medical product after the distortion of generation superlastic, and its restoring force is less.It is not good enough that super-elasticity produces the lower Ti-Ni alloy elastic performance under human body temperature that makes of temperature.
Summary of the invention
The problems such as the temperature that titanium nickel binary alloy weighted platform stress is large in order to solve, Stress resort large and super-elasticity produces is lower, the invention provides the Ni-based quad alloy of a kind of titanium, there is less weighted platform stress and Stress resort, and elastic performance is good under human body temperature.
Design of alloy of the present invention is:
The Ni-based quaternary shape memory alloy of titanium comprises Ti element, Ni element, Cu element and Co element, wherein Ni element accounts for alloy monolithic weight ratio is 45 ~ 55%, it is 1 ~ 10% that Cu element accounts for alloy monolithic weight ratio, it is 0.1 ~ 3% that Co element accounts for alloy monolithic weight ratio, and all the other are Ti element and inevitable impurity.
The alloy preparation method that the present invention relates to, comprises the steps:
1, vacuum induction melting method is adopted to obtain the Ti-Ni-Cu-Co alloy of uniform composition.
2, melting obtains Ti-Ni-Cu-Co alloy cast ingot, carries out hot-work 950 ~ 1050 DEG C of temperature ranges.
3, through the Ti-Ni-Cu-Co alloy of above-mentioned process, in 500 ~ 750 DEG C of temperature ranges, carry out drawing or rolling, obtain excellent silk material or sheet material.
4, Ti-Ni-Cu-Co rod silk material or sheet material carry out timeliness, soaking time 5 ~ 15min in 350 ~ 500 DEG C of temperature ranges.
In step 1, first titanium sponge, electrolytic nickel, oxygen free copper and electrolytic cobalt are evenly configured to alloy material by a certain percentage, alloy material is pressed into battery lead rod, then becomes ingot casting through vacuum induction melting.
In step 1, when adopting vacuum induction melting, fine melt under high-purity argon gas protection, in vacuum 10
-1ti-Ni-Cu-Co quaternary shape memory alloy is prepared in below Pa refining.
In step 2, described hot procedure comprises cogging forging and rolling, and its deflection is 70% ~ 90%, forging rolling temperature 950 ~ 1050 DEG C.
In step 3, described drawing or rolling, pass deformation is 10 ~ 20%.
Compared with prior art, the present invention has following characteristics:
1., compared with binary Ti-Ni alloy, this invention alloy is after suitable processing treatment, and weighted platform stress is little, and Stress resort is little.
2., compared with Ti-Ni alloy polynary with other, this invention alloy contained alloying element kind under the condition that performance is suitable is less, more easily obtains the ingot casting of uniform composition in fusion process.
3., compared with Ti-Ni alloy polynary with other, each element fusing point of this invention alloy is at 1083 ~ 1668 DEG C, not containing high-melting-point raw material in electrode pressing, low to induction melting equipment work temperature requirement.
4. compared with Ti-Ni alloy polynary with other, this invention alloy each element fusing point is close, more easy to control at fusion process interalloy composition, and alloy uniformity improves.
Technique effect of the present invention:
Fig. 1 is the Ni-based shape memory alloy of titanium involved in the present invention and the stress-strain(ed) curve of binary Ti-Ni marmem under same test condition, wherein code 1 refers to 6% strain loading unloading curve of titanium of the present invention Ni-based quaternary shape memory alloy silk material, and code 2 refers to 6% strain loading unloading curve of conventional binary Ti-Ni alloy silk material.Probe temperature is 37 DEG C, close with human body temperature.The weighted platform stress of visible titanium of the present invention Ni-based quaternary shape memory alloy silk material is less than conventional binary Ti-Ni alloy silk material, the weighted platform stress of titanium of the present invention Ni-based quaternary shape memory alloy silk material is about 300 ~ 350MPa, and the weighted platform stress of conventional binary Ti-Ni alloy silk material is about 450MPa.The Stress resort of titanium of the present invention Ni-based quaternary shape memory alloy silk material is 200 ~ 250MPa, the Stress resort of conventional binary Ti-Ni alloy silk material is about 350MPa, and the offload platform stress more conventional binary Ti-Ni alloy of titanium of the present invention Ni-based quaternary shape memory alloy silk material is slightly high.After 6% strain loading unloading, both super-elasticity are good.
Accompanying drawing explanation
Fig. 1 is Ti-52Ni-5Cu-2.5Co quaternary shape memory alloy involved in the present invention and the stress-strain(ed) curve of binary Ti-55.8Ni shape memory alloy under human body temperature, and wherein X-coordinate is strain, unit %; Ordinate zou is stress, units MPa.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
A kind of bio-medical Ti-Ni-Cu-Co quaternary shape memory alloy, it is characterized in that this alloy is elementary composition primarily of Ti, Ni, Cu and Co tetra-kinds, be: Ni:45 ~ 55%, Cu:1 ~ 10%, Co:0.1 ~ 3% that surplus is titanium and inevitable impurity by weight percentage.Adopt titanium sponge, electrolytic nickel, oxygen-free copper bar and electrolytic cobalt to be raw material, through electrode pressing bar, be smelted into ingot casting by vacuum medium frequency induction furnace.Then alloy of the present invention is produced through manufacturing procedures such as forging, rolling, thermal treatments.Forging rolling is carried out at Heating temperature 950 ~ 1050 DEG C, and ageing treatment is carried out at Heating temperature 350 ~ 500 DEG C, insulation 5 ~ 15min, water-cooled.
The application of the Ni-based quaternary shape memory alloy of titanium of the present invention can be plate, rod, silk material and tubing, and the machine of these materials adds goods.
Embodiment 1: employing 0A level titanium sponge, 1 grade of electrolytic nickel, oxygen-free copper bar and electrolytic cobalt are raw material, by nominal composition Ti-45Ni-10Cu-3.0Co alloyage material.Alloy material is pressed into electrode block after batch mixing.In vacuum induction melting furnace, electrode is smelted into the Ni-based quaternary shape memory alloy ingot of titanium.Melting vacuum tightness is 2 × 10
-2pa, melting voltage is 250 ~ 300V, and melting electric current is 90 ~ 100A.Ingot casting enters stove at 1000 DEG C, direct drawing out forging after insulation 2h.One fire is swaged into the square rod of 50 × 50.Hot rolling is carried out on 250 open-train mills, and hot rolling technology is that after 950 DEG C of insulation 30min, the square rod Direct Rolling by 50 × 50 becomes the wire rod of Φ 8.5.This wire rod obtains Φ 1.2 materials after 500 ~ 750 DEG C of multi pass drawings, and Φ 1.2 materials obtain finished silk material at 400 DEG C after 5min on-line straightening timeliness.This alloy 6% strain loading plateau stress under human body temperature is σ l is 300MPa, and Stress resort Δ σ is 200MPa, residual strain < 0.3%.
Embodiment 2: by nominal composition Ti-55Ni-10Cu-0.1Co alloyage material.Alloy material is pressed into electrode block after batch mixing, in vacuum induction melting furnace, electrode is smelted into quaternary shape memory alloy ingot.Melting vacuum tightness is 2 × 10
-2pa, melting voltage is 250 ~ 300V, and melting electric current is 90 ~ 100A.Ingot casting enters stove at 1050 DEG C, direct drawing out forging after insulation 2h.One fire is swaged into the square rod of 50 × 50.Hot rolling is carried out on 250 open-train mills, and hot rolling technology is that after 1000 DEG C of insulation 30min, the square rod Direct Rolling by 50 × 50 becomes the wire rod of Φ 8.5.This wire rod obtains Φ 1.2 materials after 500 ~ 750 DEG C of multi pass drawings, and Φ 1.2 materials obtain finished silk material at 450 DEG C after 10min on-line straightening timeliness.This alloy 6% strain loading plateau stress under human body temperature is σ l is 330MPa, and Stress resort Δ σ is 230MPa, residual strain < 0.3%.
Embodiment 3: similar with embodiment 1 step, by nominal composition Ti-52Ni-5Cu-2.5Co alloyage material.This alloy 6% strain loading plateau stress under human body temperature is σ l is 330MPa, and Stress resort Δ σ is 200MPa, residual strain < 0.3%.
Claims (2)
1. a bio-medical Ti-Ni-Cu-Co quaternary shape memory alloy, it is characterized in that: this shape memory alloy is elementary composition primarily of Ti, Ni, Cu and Co tetra-kinds, be: Ni:45 ~ 55%, Cu:1 ~ 10%, Co:0.1 ~ 3% that surplus is titanium and inevitable impurity by weight percentage.
2. a kind of bio-medical Ti-Ni-Cu-Co quaternary shape memory alloy according to claim 1, it is characterized in that this alloy has lower weighted platform stress and narrow Stress resort, its weighted platform stress σ l=300 ~ 350MPa, Stress resort Δ σ=200 ~ 250MPa.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191623A (en) * | 2016-07-08 | 2016-12-07 | 苏州市皎朝纳米科技有限公司 | A kind of NiTi system marmem and its preparation method and application |
| CN113134628A (en) * | 2021-04-20 | 2021-07-20 | 中国石油大学(北京) | Laser additive machining method and application of Ti-Ni-Cu-Co material |
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| EP0465030A2 (en) * | 1990-06-29 | 1992-01-08 | Ormco Corporation | Orthodontic appliances for moving teeth |
| JP2009013461A (en) * | 2007-07-04 | 2009-01-22 | Nec Tokin Corp | Spectacles frame and method for producing the same |
| CN101696481A (en) * | 2009-10-23 | 2010-04-21 | 哈尔滨工业大学 | Ultrahigh recovery stress Ti-Ni-Cu shape memory alloy thin film and preparation method thereof |
| CN102851545A (en) * | 2012-10-11 | 2013-01-02 | 河北工业大学 | Ni-Mn-Ge magnetic shape memory alloy and preparation method thereof |
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2014
- 2014-12-24 CN CN201410813918.8A patent/CN104480349A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0465030A2 (en) * | 1990-06-29 | 1992-01-08 | Ormco Corporation | Orthodontic appliances for moving teeth |
| JP2009013461A (en) * | 2007-07-04 | 2009-01-22 | Nec Tokin Corp | Spectacles frame and method for producing the same |
| CN101696481A (en) * | 2009-10-23 | 2010-04-21 | 哈尔滨工业大学 | Ultrahigh recovery stress Ti-Ni-Cu shape memory alloy thin film and preparation method thereof |
| CN102851545A (en) * | 2012-10-11 | 2013-01-02 | 河北工业大学 | Ni-Mn-Ge magnetic shape memory alloy and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191623A (en) * | 2016-07-08 | 2016-12-07 | 苏州市皎朝纳米科技有限公司 | A kind of NiTi system marmem and its preparation method and application |
| CN113134628A (en) * | 2021-04-20 | 2021-07-20 | 中国石油大学(北京) | Laser additive machining method and application of Ti-Ni-Cu-Co material |
| CN113134628B (en) * | 2021-04-20 | 2022-05-03 | 中国石油大学(北京) | Laser additive processing method and application of Ti-Ni-Cu-Co material |
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Application publication date: 20150401 |