CN104674034A - Aluminum-tungsten-niobium three-element intermediate alloy and preparation method thereof - Google Patents
Aluminum-tungsten-niobium three-element intermediate alloy and preparation method thereof Download PDFInfo
- Publication number
- CN104674034A CN104674034A CN201310628855.4A CN201310628855A CN104674034A CN 104674034 A CN104674034 A CN 104674034A CN 201310628855 A CN201310628855 A CN 201310628855A CN 104674034 A CN104674034 A CN 104674034A
- Authority
- CN
- China
- Prior art keywords
- master alloy
- melting
- ingot casting
- intermetallic compound
- composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses an aluminum-tungsten-niobium three-element intermediate alloy which comprises the following components in percentage by weight: 25-40wt% of W, 20-35wt% of Nb, 0-0.3wt% of microelements and the balance of Al. The invention further discloses a preparation method of the intermediate alloy and a method for preparing a high Nb-TiAl intermetallic compound cast ingot by using the intermediate alloy. By adopting the alloy disclosed by the invention, the phenomenon that the melting current is unstable due to inconsistency of metal single substances in of the melting point is avoided in the intermetallic compound melting process, and the stability of the melting process is improved, and the probability that high-melting-point refractory elements Nb and W form a severe high-density inclusion and segregation defect is effectively reduced, so that the components and uniformity of the high-melting-point refractory element titanium aluminum intermetallic compound are guaranteed due to the invention and application of the intermediate alloy.
Description
Technical field
The present invention relates to master alloy, refer in particular to a kind of aluminium tungsten niobium element master alloy and preparation method thereof.
Background technology
In intermetallic compound, home and abroad investigator carries forward vigorously a kind of composition of high Nb content high temperature titanium aluminum alloy, tissue, performance, preparation technology with application technical research compared with conventional titanium aluminum alloy, and its use temperature improves 60 ~ 100 DEG C, the high 300 ~ 500MPa of intensity.Its intensity index is close with turbine disk common variation nickel base superalloy, and proportion is about its half.Its antioxidant property is much better than common titanium aluminum alloy, close with the nickel base superalloy that oxidation-resistance is best.
This type of intermetallic compound gives prominence to the low Al of high Nb, and basal component feature is: according to weight percent meter, Nb:10.55 ~ 30wt%; Al:28.33 ~ 30wt%; W:0.87 ~ 8.65wt%, surplus Ti.Add high-melting-point Nb element in alloy in a large number, being by improving alloy melting point, reducing to expand and calculating and stacking fault energy, unexpectedly improving creep property, promoting twinning deformation, improving high temperature microstructure stability, to reach the object improving use temperature; Add a certain amount of W element in alloy, carry heavy alloyed ductile-brittle transition temperature, room temperature strength can be made higher and have certain moulding.
But the fusing point of Ti, Al, Nb, W element differs greatly in alloy, density difference is also comparatively large, and Ti is 1669 DEG C, Al fusing point is 660 DEG C, Nb is 2467 DEG C, W:3370 DEG C, if simultaneously with pure material form mixing, Al element is by a large amount of scaling loss; Nb, W element and matrix deviation are comparatively large, and be β phase stable element, reality is nonequilibrium freezing, and Nb, W diffusion is slow, and β phase can not generate α phase by solid-state phase changes completely, residues in crystal boundary, dissolve insufficient by segregation phenomena serious for generation during melting.
Under normal circumstances, pure metal raw material is replaced to be the primary approach solving melting segregation by the master alloy of coherent element, existing melting select materials design time Nb element added by Al-Nb master alloy mode, the patent No. is 200310119078.7 describe a kind of Al-Ti-Nb master alloy and preparation method thereof, and the patent No. is 200310119076.8 describe a kind of aluminium niobium master alloy and preparation method thereof; B element adds in Al-Ti-B master alloy mode, and the patent No. is 200310119083.8 disclose a kind of Al-Ti-B intermediate alloy and preparation method thereof.And W element adopts pure tungsten powder directly to add, there is no Patents introduction add about W master alloy for TiAl intermetallic compound ingot casting smelt in, and W powder belongs to high-melting-point insoluble metal, the ratio of infusibility easy segregation when W element is smelted will be added, and for the batch production of enterprise large ingot shape the preparation of pure tungsten powder and carrying cost higher, needing the master alloy designed by adding W to replace pure tungsten powder to alleviate the segregation problems of element for this reason, obtaining composition and the controlled high-melting-point high alloy content Intermatallic Ti-Al compound ingot casting of homogeneity thereof.
Summary of the invention
For the above-mentioned shortcoming existed in prior art, the object of this invention is to provide a kind of aluminium tungsten niobium element master alloy and preparation method thereof, be applicable to the preparation of multielement high-content titanium alloy, effectively can reduce high-melting-point element W, Nb formation high-density in ingot casting fusion process and be mingled with the probability of segregation defects, ensure the homogeneity of ingredients of Intermatallic Ti-Al compound ingot casting.
For achieving the above object, the present invention adopts following technical scheme:
On the one hand, a kind of aluminium tungsten niobium element master alloy, the composition of this aluminium tungsten niobium element master alloy comprises W, the Nb of 20 ~ 35wt%, the trace element of 0 ~ 0.3wt% of 25 ~ 40wt%, and surplus is Al.
On the other hand, a kind of preparation method of aluminium tungsten niobium element master alloy, comprises the following steps:
A. with Al, WO
3, Nb
2o
5for raw material, after mixing by 50 ~ 90wt%:30 ~ 55wt%:25 ~ 55wt%, obtain aluminium tungsten niobium element master alloy ingot casting by thermite reaction;
B. above-mentioned master alloy ingot casting is made the master alloy product of 0.25 ~ 6mm granularity through finishing, fragmentation, selected operation, its composition comprises W, the Nb of 20 ~ 35wt%, the trace element of 0 ~ 0.3wt% of 25 ~ 40wt%, and surplus is Al.
The third aspect, a kind of smelting process of high Nb-TiAl intermetallic compound ingot casting, comprises the following steps:
A. composition is comprised the W of 25 ~ 40wt%, the Nb of 20 ~ 35wt%, the trace element of 0 ~ 0.3wt%, surplus is Al, and granularity is aluminium tungsten niobium element master alloy product and titanium sponge, Al-Nb, Al-Ti-B, Al silk master alloy raw material of 0.25 ~ 6mm, carry out puddling evenly according to 2 ~ 5wt%:45 ~ 55wt%:20 ~ 30wt%:4 ~ 6wt%:15 ~ 18wt%, through stirring, mould cloth and be crushed to the high Nb-TiAl intermetallic compound electrode of plasma cold pool furnace;
B. by obtaining Intermatallic Ti-Al compound ingot casting after the melting of a plasma cold pool furnace.
Adopt the aluminium tungsten niobium element master alloy in technique scheme and preparation method, metal W is adopted with existing raw material, the direct feed postition of Nb simple substance is compared, master alloy fusing point of the present invention about 1500 ~ 1600 DEG C, be similar to the fusing point (1670 DEG C) of titanium sponge, it is well below metal simple-substance Nb(2467 DEG C) and W(3370 DEG C) fusing point, the melting electric current wild effect caused because metal simple-substance fusing point is inconsistent is avoided in intermetallic compound fusion process, improve the stability of fusion process and effectively reduce high-melting-point refractory element Nb, W forms the probability that serious high-density is mingled with segregation defects, therefore the invention of this master alloy and application thereof, ensure that composition and the homogeneity thereof of high-melting-point refractory element Intermatallic Ti-Al compound.
Accompanying drawing explanation
Fig. 1 is the test chemical component table of the high Nb-TiAl intermetallic compound ingot casting prepared by three embodiments of the present invention.
Embodiment
Technical scheme of the present invention is further illustrated below in conjunction with drawings and Examples.
A kind of aluminium tungsten niobium element master alloy of the present invention, the composition of this aluminium tungsten niobium element master alloy comprises W, the Nb of 20 ~ 35wt%, the trace element of 0 ~ 0.3wt% of 25 ~ 40wt%, and surplus is Al.
The preparation method of above-mentioned aluminium tungsten niobium element master alloy, comprises the following steps:
A. with Al, WO
3, Nb
2o
5for raw material, after mixing by 50 ~ 90wt%:30 ~ 55wt%:25 ~ 55wt%, obtain aluminium tungsten niobium element master alloy ingot casting by thermite reaction;
B. above-mentioned master alloy ingot casting is made the master alloy product of 0.25 ~ 6mm granularity through finishing, fragmentation, selected operation, its composition comprises W, the Nb of 20 ~ 35wt%, the trace element of 0 ~ 0.3wt% of 25 ~ 40wt%, and surplus is Al.
And adopt master alloy product of the present invention for the smelting process of high Nb-TiAl intermetallic compound ingot casting, comprise the following steps:
A. composition is comprised the W of 25 ~ 40wt%, the Nb of 20 ~ 35wt%, the trace element of 0 ~ 0.3wt%, surplus is Al, and granularity is aluminium tungsten niobium element master alloy product and titanium sponge, Al-Nb, Al-Ti-B, Al silk master alloy raw material of 0.25 ~ 6mm, carry out puddling evenly according to 2 ~ 5wt%:45 ~ 55wt%:20 ~ 30wt%:4 ~ 6wt%:15 ~ 18wt%, through stirring, mould cloth and be crushed to the high Nb-TiAl intermetallic compound electrode of plasma cold pool furnace;
B. by obtaining Intermatallic Ti-Al compound ingot casting after the melting of a plasma cold pool furnace.
Again be described in detail below by concrete example:
Embodiment 1
High Nb containing TiAl based alloy:
Standard nominal composition be Ti-28.56Al-18.575Nb-0.87W-0.051B-0.042Y(by weight percentage: wt%).
With Al, WO
3, Nb
2o
5for raw material, by Al:WO
3: Nb
2o
5after the mixing of=70.5wt%:37.19wt%:37.67wt% proportioning, obtain aluminium tungsten niobium element master alloy ingot casting by thermite reaction, make the master alloy product of 0.25mm granularity through finishing, fragmentation, the operation such as selected.This master alloy product composition is W:29.48wt%, Nb:26.33wt%, C:0.018wt%, N:0.015wt%, O:0.066wt%, Al: surplus.By this master alloy product and titanium sponge, Al-Nb, Al-Ti-B, Al silk master alloy raw material according to 2.69:52.08:25.43:4.55:15.72(wt%) ratio mixed after, make the high Nb-TiAl intermetallic compound electrode of plasma cold pool furnace through steps such as raw material stirring, mould cloth and extruding, by obtain after the melting of a plasma cold pool furnace composition be Ti-27.63Al-18.25Nb-0.83W-0.042B-0.03Y(by weight percentage: multielement high-content height Nb-TiAl intermetallic compound ingot casting wt%).In order to verify the accuracy that ingot casting composition test is analyzed, carried out three test analysis, analytical results as shown in Figure 1, heat No. 1 ingot casting different sites uniform composition, controlled with the high Nb containing TiAl based alloy standard of embodiment 1 name composition tolerances, do not find inclusion defect.
Embodiment 2
High Nb containing TiAl based alloy:
Standard nominal composition be Ti-28.56Al-18.575Nb-0.87W-0.051B-0.042Y(by weight percentage: wt%).
With Al, WO
3, Nb
2o
5for raw material, by Al:WO3:Nb2O5=57.2:43.5:42.3(wt%) mixing after, make the master alloy product of 6mm granularity according to the method for embodiment 1.This master alloy product composition is: W:34.39wt%, Nb:29.56wt%, C:0.021wt%, N:0.014wt%, O:0.062wt%, Fe:0.063wt%, Si:0.047wt%, Al: surplus.By this master alloy product and titanium sponge, Al-Nb, Al-Ti-B, Al silk master alloy raw material according to 2.55:52.5:25.4:4.57:15.87(wt%) ratio mixed after, make the high Nb-TiAl intermetallic compound electrode of plasma cold pool furnace through steps such as raw material stirring, mould cloth and extruding, by obtain after the melting of a plasma cold pool furnace composition be Ti-27.19Al-17.98Nb-0.84W-0.043B-0.03Y(by weight percentage: the high Nb-TiAl intermetallic compound ingot casting of multielement high-content wt%).Analytical results as shown in Figure 1, heat No. 1 ingot casting different sites uniform composition, controlled with the high Nb containing TiAl based alloy standard of embodiment 1 name composition tolerances, do not find inclusion defect.
Embodiment 3:
High Nb containing TiAl based alloy:
Standard nominal composition Ti-28.56Al-18.575Nb-0.87W-0.051B-0.042Y(is by weight percentage: wt%).
With Al, WO
3, Nb
2o
5for originally, by Al:WO
3: Nb
2o
5=88.78:33.15:34.8(wt%) mixing after, make the master alloy product of 3mm granularity according to the method for embodiment 1.This master alloy product composition is: W:26.28wt%, Nb:24.3wt5%, C:0.022wt%, N:0.013wt%, O:0.065wt%, Fe:0.062wt%, Si:0.049%, Al: surplus.By this master alloy product and titanium sponge, Al-Nb, Al-Ti-B, Al silk master alloy raw material according to 3.31:51.6:25.42:4.55:15.7(wt%) ratio mixed after, make the high Nb-TiAl intermetallic compound electrode of plasma cold pool furnace through steps such as raw material stirring, mould cloth and extruding, by obtain after the melting of a plasma cold pool furnace composition be Ti-28.43Al-18.06Nb-0.84W-0.046B-0.029Y(by weight percentage: multielement high-content height Nb-TiAl intermetallic compound ingot casting wt%).Analytical results as shown in Figure 1, heat No. 3 ingot casting different sites uniform composition, with embodiment 3 alloy cast ingot standard name composition tolerances controlled, do not find inclusion defect.
Visible by above-mentioned three embodiments, this type of element master alloy is applicable to the raw material of the intermetallic compound ingot casting as high-content Nb, W element, and to apply it to containing the method in the melting of high-melting-point refractory element intermetallic compound ingot casting be feasible.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment, modification.
Claims (3)
1. an aluminium tungsten niobium element master alloy, is characterized in that:
The composition of this aluminium tungsten niobium element master alloy comprises W, the Nb of 20 ~ 35wt%, the trace element of 0 ~ 0.3wt% of 25 ~ 40wt%, and surplus is Al.
2. a preparation method for aluminium tungsten niobium element master alloy, is characterized in that:
Comprise the following steps:
A. with Al, WO
3, Nb
2o
5for raw material, after mixing by 50 ~ 90wt%:30 ~ 55wt%:25 ~ 55wt%, obtain aluminium tungsten niobium element master alloy ingot casting by thermite reaction;
B. above-mentioned master alloy ingot casting is made the master alloy product of 0.25 ~ 6mm granularity through finishing, fragmentation, selected operation, its composition comprises W, the Nb of 20 ~ 35wt%, the trace element of 0 ~ 0.3wt% of 25 ~ 40wt%, and surplus is Al.
3. a smelting process for high Nb-TiAl intermetallic compound ingot casting, is characterized in that:
Comprise the following steps:
A. composition is comprised the W of 25 ~ 40wt%, the Nb of 20 ~ 35wt%, the trace element of 0 ~ 0.3wt%, surplus is Al, and granularity is aluminium tungsten niobium element master alloy product and titanium sponge, Al-Nb, Al-Ti-B, Al silk master alloy raw material of 0.25 ~ 6mm, carry out puddling evenly according to 2 ~ 5wt%:45 ~ 55wt%:20 ~ 30wt%:4 ~ 6wt%:15 ~ 18wt%, through stirring, mould cloth and be crushed to the high Nb-TiAl intermetallic compound electrode of plasma cold pool furnace;
B. by obtaining Intermatallic Ti-Al compound ingot casting after the melting of a plasma cold pool furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310628855.4A CN104674034A (en) | 2013-11-29 | 2013-11-29 | Aluminum-tungsten-niobium three-element intermediate alloy and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310628855.4A CN104674034A (en) | 2013-11-29 | 2013-11-29 | Aluminum-tungsten-niobium three-element intermediate alloy and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104674034A true CN104674034A (en) | 2015-06-03 |
Family
ID=53309615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310628855.4A Pending CN104674034A (en) | 2013-11-29 | 2013-11-29 | Aluminum-tungsten-niobium three-element intermediate alloy and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104674034A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107400806A (en) * | 2017-06-15 | 2017-11-28 | 中北大学 | A kind of intermediate alloy to go bad for secondary aluminium Fe-riched phase and preparation method thereof |
| CN107400805A (en) * | 2017-06-15 | 2017-11-28 | 中北大学 | A kind of aluminium strontium tungsten intermediate alloy and preparation method thereof |
| CN108330338A (en) * | 2017-01-18 | 2018-07-27 | 无锡飞而康精铸工程有限公司 | A kind of three element intermediate alloy of aluminium manganese niobium and preparation method thereof |
| CN111254461A (en) * | 2020-01-19 | 2020-06-09 | 安徽大学 | Tungsten oxide/bismuth oxyiodide heterojunction material for photo-reduction of carbon dioxide and preparation method and application thereof |
| CN113881871A (en) * | 2021-09-30 | 2022-01-04 | 中国航发北京航空材料研究院 | Ti-W-Nb intermediate alloy and preparation method thereof |
| CN116287826A (en) * | 2023-03-24 | 2023-06-23 | 承德天大钒业有限责任公司 | Production method of aluminum-tungsten alloy |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508271A (en) * | 2002-12-20 | 2004-06-30 | 张忠世 | Aluminium-tungsten system intermediate alloy and preparing method thereof |
| CN1584080A (en) * | 2004-06-16 | 2005-02-23 | 哈尔滨工业大学 | TiAl intermetallic compound materials containing yttebium and preparing method thereof |
| CN1629341A (en) * | 2003-12-15 | 2005-06-22 | 张忠士 | An Al-Ti-Nb intermediate alloy and process for preparing same |
| CN1629345A (en) * | 2003-12-15 | 2005-06-22 | 张忠士 | An Al-Ti-B intermediate alloy and process for preparing same |
| CN102965531A (en) * | 2012-12-14 | 2013-03-13 | 西北有色金属研究院 | Preparation method of titanium alloy cast ingot containing high-melting-point elements |
| CN103074520A (en) * | 2013-01-14 | 2013-05-01 | 北京工业大学 | Er-containing high-niobium Ti-Al intermetallic compound material and preparation method thereof |
-
2013
- 2013-11-29 CN CN201310628855.4A patent/CN104674034A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508271A (en) * | 2002-12-20 | 2004-06-30 | 张忠世 | Aluminium-tungsten system intermediate alloy and preparing method thereof |
| CN1629341A (en) * | 2003-12-15 | 2005-06-22 | 张忠士 | An Al-Ti-Nb intermediate alloy and process for preparing same |
| CN1629345A (en) * | 2003-12-15 | 2005-06-22 | 张忠士 | An Al-Ti-B intermediate alloy and process for preparing same |
| CN1584080A (en) * | 2004-06-16 | 2005-02-23 | 哈尔滨工业大学 | TiAl intermetallic compound materials containing yttebium and preparing method thereof |
| CN102965531A (en) * | 2012-12-14 | 2013-03-13 | 西北有色金属研究院 | Preparation method of titanium alloy cast ingot containing high-melting-point elements |
| CN103074520A (en) * | 2013-01-14 | 2013-05-01 | 北京工业大学 | Er-containing high-niobium Ti-Al intermetallic compound material and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 刘自成等: "添加W对高铌TiAl合金组织和力学性能的影响", 《材料热处理学报》 * |
| 王万波等: "等离子冷床炉熔炼高密度夹杂物去除研究", 《第六届华东三省一市真空学术交流会论文集》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108330338A (en) * | 2017-01-18 | 2018-07-27 | 无锡飞而康精铸工程有限公司 | A kind of three element intermediate alloy of aluminium manganese niobium and preparation method thereof |
| CN107400806A (en) * | 2017-06-15 | 2017-11-28 | 中北大学 | A kind of intermediate alloy to go bad for secondary aluminium Fe-riched phase and preparation method thereof |
| CN107400805A (en) * | 2017-06-15 | 2017-11-28 | 中北大学 | A kind of aluminium strontium tungsten intermediate alloy and preparation method thereof |
| CN107400806B (en) * | 2017-06-15 | 2019-04-16 | 中北大学 | A kind of intermediate alloy and preparation method thereof to go bad for secondary aluminium Fe-riched phase |
| CN111254461A (en) * | 2020-01-19 | 2020-06-09 | 安徽大学 | Tungsten oxide/bismuth oxyiodide heterojunction material for photo-reduction of carbon dioxide and preparation method and application thereof |
| CN111254461B (en) * | 2020-01-19 | 2021-08-27 | 安徽大学 | Tungsten oxide/bismuth oxyiodide heterojunction material for photo-reduction of carbon dioxide and preparation method and application thereof |
| CN113881871A (en) * | 2021-09-30 | 2022-01-04 | 中国航发北京航空材料研究院 | Ti-W-Nb intermediate alloy and preparation method thereof |
| CN116287826A (en) * | 2023-03-24 | 2023-06-23 | 承德天大钒业有限责任公司 | Production method of aluminum-tungsten alloy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104674034A (en) | Aluminum-tungsten-niobium three-element intermediate alloy and preparation method thereof | |
| CN103773969B (en) | A kind of preparation method of the electrode for titanium alloy vacuum consumable smelting containing tantalum | |
| CN102424923B (en) | Al-Ti-B-rare earth(RE) grain refiner and preparation method thereof | |
| CN101967569B (en) | Tungsten-containing titanium alloy smelting method | |
| CN105112759A (en) | High-temperature-resistant high-entropy alloy material and preparation method thereof | |
| CN101413061A (en) | Electron beam cold hearth melting recovery method for titanium and titanium alloy chip scrap | |
| CN104532059A (en) | Rare-earth containing high-temperature titanium alloy and preparation method thereof | |
| CN102703738A (en) | Preparation method of Al-Ti-B-C quaternary grain refiner | |
| CN105177355B (en) | Nearly alpha titanium alloy of a kind of high dynamic performance and preparation method thereof | |
| Wang et al. | Fabrication of in situ AlN-TiN/Al inoculant and its refining efficiency and reinforcing effect on pure aluminum | |
| CN101935773A (en) | Titanium boron rare earth grain refiner for aluminum alloy and preparation method thereof | |
| US10494699B2 (en) | Method of refining aluminum alloy | |
| CN111349816A (en) | Novel Ti-1300F high-strength high-toughness titanium alloy and preparation method thereof | |
| CN101633990B (en) | Al-Mo-W-Ti quaternary alloy for titanium alloy production | |
| CN102051493A (en) | Preparation method of multielement titanium alloy | |
| CN102534274A (en) | Method for preparing Al-Ti-B intermediate alloy refining agent for aluminum | |
| CN103740969B (en) | The preparation method of a kind of copper-phosphorus alloy | |
| CN101880810B (en) | Hard alloy containing nickel aluminide and boron copper base and preparation method thereof | |
| CN102816942B (en) | Process and device for producing high-nitrogen sponge titanium | |
| CN103757463B (en) | copper-phosphorus alloy and preparation method thereof | |
| CN103215462A (en) | Device and process for producing silicon containing titanium sponge | |
| JP7340875B2 (en) | Copper titanium alloy containing eutectic structure and its preparation method | |
| CN105734315A (en) | Cast aluminum alloy grain refiner and preparation method thereof | |
| CN104831093A (en) | Zr-2.5Nb alloy casting ingot preparation method | |
| CN106947904B (en) | It is a kind of for aluminium vanadium molybdenum chromium zirconium intermediate alloy of TB9 titanium alloys and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150603 |