CN102732747A - Method for preparing Ti-24Nb-8Sn alloy by using TiH2 powder as raw material though powder metallurgy - Google Patents
Method for preparing Ti-24Nb-8Sn alloy by using TiH2 powder as raw material though powder metallurgy Download PDFInfo
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Abstract
The invention discloses a method for preparing Ti-24Nb-8Sn alloy by using TiH2 powder as raw material though powder metallurgy, comprising the following steps: firstly preparing TiH2 powder, Nb powder and Sn powder with the weight ratio of TiH2 to Nb to Sn being 68 to 24 to 8, carrying out dry blending on the prepared powder for 5 h, using a universal material testing machine to form with the compacting pressure of 350 Mpa, and maintaining the pressure for 7-8 s, and sintering the sample in a vacuum sintering furnace. The method of the invention has the advantages of low sintering temperature, short sintering time, energy saving and environmental protection, and the obtained product has high density, small and uniform particle size, few impurities, high tensile strength, large hardness, and the like.
Description
Technical field
The invention belongs to powder metallurgical technology, particularly a kind of with TiH
2Powder prepares the method for Ti-24Nb-8Sn alloy for the raw material powder metallurgy method.
Background technology
Titanium and titanium alloy thereof have the excellent properties such as erosion resistance of high specific strength, low density, favorable mechanical performance, brilliance, are widely used in fields such as biotechnology, automobile and aerospace.But; The machinability of titanium and alloy thereof is relatively poor; Hardness is cut difficulty especially during greater than HB350, then is prone to sticking cutter phenomenon during less than HB300, is difficult to cutting; Become the obstacle of mass production complicated shape part, thereby to produce titanium part with powder metallurgic method be a kind of good terms of settlement.
Titanium is nontoxic, light weight, intensity high and have excellent biocompatibility, is relatively unusual ideal medical metal material, can be used as the implant of implant into body etc.At present, the widely used Ti-6Al-4V ELI alloy that is still in medical field.But the latter can separate out the vanadium and the aluminum ion of denier, has reduced its cell adapted property and human body is worked the mischief this problem of medical circle extensive concern.The U.S. as far back as 20th century the mid-80 just begin to develop no aluminium, do not have vanadium, have the titanium alloy of biocompatibility, use it for orthopaedy.Number of research projects is also being done in Japan, West Europe etc. aspect this, and obtains some new progresses.For example, Japan has developed a series of alpha+beta titanium alloys with good biocompatibility, and anticorrosive intensity, fatigue resistance and the corrosion resistance of these alloys all are superior to Ti-6Al-4V ELI.Compare with alpha titanium alloy and alpha+beta titanium alloys, beta-titanium alloy has higher strength level, and better otch performance and toughness, is more suitable for as the implant implant into body.
Beta titanium alloy is a biological medical titanium alloy priority research areas in recent years; Japan TKK company adopts pure Ti powder and 39Al-26V-17.5Fe-17.5Mo master alloyed powder; Prepared the SP-700 titanium alloy through batch mixing, mold pressing and vacuum sintering; Ti-15Mo-3Nb is American TI MET the company a kind of novel low elastic modulus, the HS that on the Ti-15Mo-3Nb-3Al basis, develop and the metastability β type biological titanium alloy with better corrosion resistance; The Ti-24Nb-4Zr-7.9Sn alloy is one type of special beta titanium alloy, and experts such as (associating) laboratory Yang Rui of engineering alloy research department of Shenyang Materials science country of metal institute of the Chinese Academy of Sciences, Hao Yulin adopt fusion casting to succeed in developing and in clinic trial, this method is to experiment material; Experimental situations etc. require than higher; And the present invention develops Ti-24Nb-8Sn and on the Ti-24Nb-4Zr-7.9Sn basis, has done a series of researchs, reducing a kind of element, reaches to succeed in developing on the result of use basis.
Powder metallurgic method be produce metal or with metal-powder (or mixture of metal-powder and non-metal powder) as raw material, through being shaped and sintering, make the Technology of metallic substance, compound and all kinds goods.Powder metallurgic method has similar place with the production pottery, and therefore, a series of powder metallurgy new technologies also can be used for the preparation of stupalith.Because the advantage of PM technique, it has become the key that solves the novel material problem, in the development of novel material, plays a part very important.
The characteristics that powder metallurgic method is different from the conventional sintering method mainly contain:
(1) PM technique can reduce alloying constituent to greatest extent and gathers partially, eliminates thick, uneven cast structure.Has important effect at preparation high-performance rare-earth permanent magnet material, rare earth hydrogen storage material, rare earth luminescent material, rare earth catalyst, high temperature superconducting materia, new metallic material (like Al-Li alloy, heat-resisting Al alloy, superalloy, powder corrosion resisting stainless steel, powder rapid steel, intermetallic compound high-temperature structural material etc.).
(2) can prepare the non-equilibrium materials of a series of high-performance such as amorphous, crystallite, accurate brilliant, nanocrystalline and over-saturation sosoloid, these materials have electricity, magnetics, optics and the mechanical property of excellence.
(3) can easily realize polytype compoundly, give full play to each group element material characteristic separately, be the Technology of a kind of low cost prodn high-performance metal base and ceramic composite.
(4) can produce material with special construction and performance and the goods that common smelting process can't be produced, like novel porous biomaterial, porous diffusion barrier material, high performance structure ceramic grinding tool and ceramic material etc.
(5) can realize near-net-shape and automatic batch production, thereby, the resource and the energy consumption of production can be reduced effectively.
Summary of the invention
In order to solve the above-mentioned technical problem that existing biological medical titanium alloy exists, it is a kind of with TiH that the present invention provides
2Powder prepares the method for Ti-24Nb-8Sn alloy for the raw material powder metallurgy method, and it has, and temperature is low, sintering time short, the characteristics of energy-conserving and environment-protective, and the products therefrom density is high, grain-size is more tiny evenly, and impurity is few.
The technical scheme that the present invention solves the problems of the technologies described above may further comprise the steps: earlier with TiH
2Powder, Nb powder and Sn powder are pressed mass ratio TiH
2: the Nb:Sn=68:24:8 configuration, the powder that configures is done mixed 5 h, be shaped and adopt the universal material experimental machine, pressing pressure 350 Mpa, pressurize 7～8 s are with sample sintering in vacuum sintering furnace.
Further; Said agglomerating process step is: with 60min time, vacuum oven power is that the speed of 30KW power is warming up to 300 ℃; Under this temperature, being incubated 30min, is that the speed of 50KW power is warming up to 750 ℃ with 90min time, vacuum oven power again, under this temperature, is incubated 20min; Be that the speed of 60KW power is warming up to 1000 ℃ with 20min time, vacuum oven power then; Under this temperature, being incubated 20min, is that the speed of 70KW power is warming up to sintering temperature 1150-1350 ℃, insulation 1-4h furnace cooling under sintering temperature with 30min time, vacuum oven power at last.
Further, said sintering temperature is 1250 ℃, soaking time is 2h under the sintering temperature.
Technique effect of the present invention is:
1) with common smelting process relatively, adopt powder metallurgic method to prepare fertile material and goods with special construction and performance, and the sintering densification time significantly reduce, sintering temperature is significantly reduction also.
2) the sintered sample density for preparing of powder metallurgical reaches as high as 97.7%, and grain-size is about 47.5 μ m, and microtexture is good, and hole seldom.
Description of drawings
Fig. 1 is the pattern of Ti-24Nb-8Sn alloy under micro-of embodiment 1 preparation.
Fig. 2 is the pattern of Ti-24Nb-8Sn alloy under micro-of embodiment 2 preparation.
Fig. 3 is the pattern of Ti-24Nb-8Sn alloy under micro-of embodiment 3 preparation.
Fig. 4 is the pattern of Ti-24Nb-8Sn alloy under micro-of embodiment 4 preparation.
Fig. 5 is the pattern of Ti-24Nb-8Sn alloy under micro-of embodiment 5 preparation.
Fig. 6 is the pattern of Ti-24Nb-8Sn alloy under micro-of embodiment 6 preparation.
Fig. 7 is the pattern of Ti-24Nb-8Sn alloy under micro-of embodiment 7 preparation.
Fig. 8 is the pattern of Ti-24Nb-8Sn alloy under micro-of embodiment 8 preparation.
Embodiment
Embodiment 1
Earlier with TiH
2Powder, Nb powder and Sn powder are pressed mass ratio TiH
2: the Nb:Sn=68:24:8 configuration, the powder that configures is put into four jars of blenders do mixed 5 h, be shaped and adopt the universal material experimental machine, pressing pressure 350 Mpa, pressurize 7～8 s are with sample sintering in the vacuum molybdenum wire furnace.Sintering process is: with 60min time, vacuum molybdenum wire furnace power is that the speed of 30KW power is warming up to 300 ℃; Under this temperature, being incubated 30min, is that the speed of 50KW power is warming up to 750 ℃ with 90min time, vacuum molybdenum wire furnace power again, under this temperature, is incubated 20min; Be that the speed of 60KW power is warming up to 1000 ℃ with 20min time, vacuum molybdenum wire furnace power then; Under this temperature, being incubated 20min, is that the speed of 70KW power is warming up to 1150 ℃ of sintering temperatures, furnace cooling behind insulation 2h under this temperature with 30min time, vacuum molybdenum wire furnace power at last; Obtaining density is 93.4%, and average grain size is the Ti-24Nb-8Sn alloy of 45 μ m.
Embodiment 2
The difference of present embodiment and embodiment 1 only is: in the sintering process step; Be that the speed of 70KW power is warming up to 1200 ℃ of sintering temperatures at last with 30min time, vacuum oven power; Furnace cooling behind insulation 2h under this temperature; Obtaining density is 95.7%, and average grain size is the Ti-24Nb-8Sn alloy of 47 μ m.
Embodiment 3
The difference of present embodiment and embodiment 1 only is: in the sintering process step; Be that the speed of 70KW power is warming up to 1250 ℃ of sintering temperatures at last with 30min time, vacuum oven power; Furnace cooling behind insulation 2h under this temperature; Obtaining density is 97.3%, and average grain size is the Ti-24Nb-8Sn alloy of 50 μ m.
Embodiment 4
The difference of present embodiment and embodiment 1 only is: in the sintering process step; Be that the speed of 70KW power is warming up to 1300 ℃ of sintering temperatures at last with 30min time, vacuum oven power; Furnace cooling behind insulation 2h under this temperature; Obtaining density is 97.5%, and average grain size is the Ti-24Nb-8Sn alloy of 55 μ m.
Embodiment 5
The difference of present embodiment and embodiment 1 only is: in the sintering process step; Be that the speed of 70KW power is warming up to 1350 ℃ of sintering temperatures at last with 30min time, vacuum oven power; Furnace cooling behind insulation 2h under this temperature; Obtaining density is 97.7%, and average grain size is the Ti-24Nb-8Sn alloy of 60 μ m.
Embodiment 6
The difference of present embodiment and embodiment 1 only is: in the sintering process step; Be that the speed of 70KW power is warming up to 1250 ℃ at last with 30min time, vacuum oven power; Furnace cooling behind insulation 1h under this temperature; Obtaining density is 96.5%, and average grain size is the Ti-24Nb-8Sn alloy of 47 μ m.
Embodiment 7
The difference of present embodiment and embodiment 1 only is: in the sintering process step; Be that the speed of 70KW power is warming up to 1250 ℃ at last with 30min time, vacuum oven power; Furnace cooling behind insulation 3h under this temperature; Obtaining density is 97.5%, and average grain size is the Ti-24Nb-8Sn alloy of 52 μ m.
Embodiment 8
The difference of present embodiment and embodiment 1 only is: in the sintering process step; Be that the speed of 70KW power is warming up to 1250 ℃ at last with 30min time, vacuum oven power; Furnace cooling behind insulation 4h under this temperature; Obtaining density is 97.7%, and average grain size is the Ti-24Nb-8Sn alloy of 56 μ m.
The correlated performance parameter of embodiment gained Ti-24Nb-8Sn alloy is as shown in table 1.
Table 1
Claims (5)
1. with TiH
2Powder may further comprise the steps for the raw material powder metallurgy method prepares the method for Ti-24Nb-8Sn alloy, earlier with TiH
2Powder, Nb powder and Sn powder are pressed mass ratio TiH
2: the Nb:Sn=68:24:8 configuration, the powder that configures is done mixed 5 h, be shaped and adopt the universal material experimental machine, pressing pressure 350 Mpa, pressurize 7～8 s are with sample sintering in vacuum sintering furnace.
2. described with TiH according to claims 1
2Powder prepares the method for Ti-24Nb-8Sn alloy for the raw material powder metallurgy method; It is characterized in that said agglomerating process step is: with 60min time, vacuum oven power is that the speed of 30KW power is warming up to 300 ℃, under this temperature, is incubated 30min; Be that the speed of 50KW power is warming up to 750 ℃ with 90min time, vacuum oven power again; Under this temperature, being incubated 20min, is that the speed of 60KW power is warming up to 1000 ℃ with 20min time, vacuum oven power then, under this temperature, is incubated 20min; Be that the speed of 70KW power is warming up to sintering temperature 1150-1350 ℃, insulation 1-4h furnace cooling under sintering temperature at last with 30min time, vacuum oven power.
3. described with TiH according to claims 2
2Powder is characterized in that for the raw material powder metallurgy method prepares the method for Ti-24Nb-8Sn alloy said sintering temperature is 1250 ℃, and soaking time is 2h under the sintering temperature.
4. described with TiH according to claims 1
2Powder is characterized in that for the raw material powder metallurgy method prepares the method for Ti-24Nb-8Sn alloy said vacuum sintering furnace is the vacuum molybdenum wire furnace.
5. described with TiH according to claims 1
2Powder is characterized in that for the raw material powder metallurgy method prepares the method for Ti-24Nb-8Sn alloy, adopts four jars of blenders that the powder that configures is done and mixes.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103938005A (en) * | 2014-05-09 | 2014-07-23 | 湖南大学 | Method for preparing ultra-fine grained titanium and titanium alloy from jet-milled titanium hydride powder |
| CN110343905A (en) * | 2019-08-07 | 2019-10-18 | 攀枝花市天民钛业有限公司 | High-temperature titanium alloy and preparation method thereof |
| CN111203531A (en) * | 2020-03-02 | 2020-05-29 | 北京理工大学 | Powder metallurgy normal-pressure multi-step sintering method of high-density Ti-Nb-Mo alloy |
| CN112475303A (en) * | 2020-11-23 | 2021-03-12 | 江南大学 | Based on TiH2Powder metallurgy preparation method of Ti-Nb-Sn bone repair alloy |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230100A (en) * | 2011-07-01 | 2011-11-02 | 湖南科技大学 | Method for preparing Ti-Nb-Zr-Sn alloy by using powder metallurgical process |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230100A (en) * | 2011-07-01 | 2011-11-02 | 湖南科技大学 | Method for preparing Ti-Nb-Zr-Sn alloy by using powder metallurgical process |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103938005A (en) * | 2014-05-09 | 2014-07-23 | 湖南大学 | Method for preparing ultra-fine grained titanium and titanium alloy from jet-milled titanium hydride powder |
| CN103938005B (en) * | 2014-05-09 | 2016-02-17 | 湖南大学 | Airflow milling titanium hydride powder prepares the method for superfine crystal particle titanium or titanium alloy |
| CN110343905A (en) * | 2019-08-07 | 2019-10-18 | 攀枝花市天民钛业有限公司 | High-temperature titanium alloy and preparation method thereof |
| CN111203531A (en) * | 2020-03-02 | 2020-05-29 | 北京理工大学 | Powder metallurgy normal-pressure multi-step sintering method of high-density Ti-Nb-Mo alloy |
| CN111203531B (en) * | 2020-03-02 | 2020-09-25 | 北京理工大学 | Powder metallurgy normal-pressure multi-step sintering method of high-density Ti-Nb-Mo alloy |
| CN112475303A (en) * | 2020-11-23 | 2021-03-12 | 江南大学 | Based on TiH2Powder metallurgy preparation method of Ti-Nb-Sn bone repair alloy |
| WO2022105438A1 (en) * | 2020-11-23 | 2022-05-27 | 江南大学 | Tih2-based preparation method for ti-nb-sn bone repair alloy by powder metallurgy |
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Application publication date: 20121017 |