CN103725907A - Preparation method capable of preventing segregation of vanadium-aluminum alloy - Google Patents
Preparation method capable of preventing segregation of vanadium-aluminum alloy Download PDFInfo
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- CN103725907A CN103725907A CN201310742079.0A CN201310742079A CN103725907A CN 103725907 A CN103725907 A CN 103725907A CN 201310742079 A CN201310742079 A CN 201310742079A CN 103725907 A CN103725907 A CN 103725907A
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Abstract
The invention discloses a preparation method capable of preventing segregation of a vanadium-aluminum alloy. The preparation method comprises the following steps of: selecting an alumium-vanadium intermediate alloy containing 4.5-5.5% of vanadium and feeding the alumium-vanadium intermediate alloy into a smelting furnace at a temperature ranging from 760 to 770 DEG C for smelting; stirring the melt in the smelting furnace for more than three times, each for 20 minutes; controlling the temperature of the melt in the smelting furnace above 740 DEG C, sampling through a sampling mold and analyzing the chemical components of the melt; after the analysis is approved, guiding the melt to flow into a standing furnace while stirring, and quickly blowing a powdery refining agent into the melt for refining treatment by using nitrogen, wherein the dosage of the refining agent is 1.2kg/ton and the pressure of the introduced nitrogen ranges from 0.05 to 0.4Mpa, thus obtaining high-purity alumium liquid; standing for 15 minutes after refining, and then casting immediately. Compared with the prior art, the preparation method is characterized in that the rejection of the alloy due to the alloy components exceeding the standard caused by the segregation of the vanadium-aluminum alloy which results from the improper process and operation can be effectively prevented by controlling the casting temperature and the operation manner.
Description
Technical field
The present invention relates to aluminium alloy casting field, particularly a kind of preparation method who prevents vananum segregation.
Background technology
The binary intermediate alloy that vananum is comprised of v element and aluminium element, has very high consistency and elasticity.Conventional vananum comprises V 55-Al45, V 65-Al35 trade mark products different from V85-Al15.Vananum is a kind of basic material for titanium alloy, and titanium alloy is widely used in space flight and aviation industry, chemistry and preparation equipment industry, oceanographic equipment and sports equipment manufacture, biomedical equipment process industry, automobile industry, warship industry, war industry and daily necessities production.Wherein, Ti-6Al-4V (containing 4wt% V) and Ti-8Al-1Mo-1V, these two kinds of titanium alloys account for the 50wt% in titanium alloy market altogether.At present, domestic general production method of vanadium-aluminium alloy mainly adopts traditional metallothermics, with graphite cake, builds high temperature smelting furnace and bonnet by laying bricks or stones, then powdery Vanadium Pentoxide in FLAKES and aluminium powder is packed in Reaktionsofen according to a certain ratio after manually mixing; Then igniting is smelted; Naturally cooling is come out of the stove for 24 hours; Oxide film is removed in manual sorting; Crushing packing.Because Vanadium Pentoxide in FLAKES reacts with metallic aluminium, emit a large amount of heats, heat significantly superfluous, make reaction present explosivity, adiabatic in the situation that, be enough to make the temperature of system to be elevated to more than 3000 ℃.Therefore, in furnace charge, conventionally to allocate the temperature rise that a certain amount of thermit powder that disappears is controlled speed of response and reaction product into.The subject matter that above-mentioned traditional metallothermics faces: the one, because the thermit powder that disappears always contains a certain amount of Fe, Si, P and heavy metal element, so just bring more trouble to the Control of Impurities of product.The 2nd, homogeneity of ingredients is poor, and each position segregation of alloy pig is larger, and the deviation of different sites reaches 3%.Therefore be difficult to reach the standby requirement of aviation-grade titanium alloys.
Summary of the invention
The object of the invention is to provide a kind of preparation method who prevents vananum segregation.
For achieving the above object, the present invention implements according to following technical scheme:
A preparation method who prevents vananum segregation, comprises the steps:
1) select the aluminium vanadium master alloy containing vanadium 4.5-5.5%, drop in the smelting furnace of 760-770 ℃ and carry out melting;
2) every 20 minutes to smelting furnace in Melt Stirring once, stir altogether more than 3 times;
3) temperature of melt in smelting furnace is controlled at more than 740 ℃, by the chemical composition of sampling mold sampling analysis melt;
4) analyze qualified after, melt is imported to standing furnace while stirring, with nitrogen, powder refining agent is blown in melt and makes refining treatment rapidly, refining agent consumption is 1.2 kgs/tonne, passing into nitrogen pressure is 0.05～0.4Mpa, thereby obtains the higher aluminium liquid of clarity;
5) after refining after standing 15 minutes, casting immediately.
As preferably, before described step 3) sampling, sampling mold is heated to 400-500 ℃, the melt in smelting furnace is fully stirred, in the centre of smelting furnace, the degree of depth 1/2nd places sample.
As preferably, before described step 4) melt importing standing furnace, standing furnace is warming up to more than 780 ℃.
Compared with prior art, the present invention is by controlling casting temp and operating method, just can effectively prevent from causing vananum segregation because of technique and misoperation, and alloying constituent is exceeded standard, scraps.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, in illustrative examples and the explanation of this invention, is used for explaining the present invention, but not as a limitation of the invention.
Embodiment 1
A preparation method who prevents vananum segregation, comprises the steps:
1) select the aluminium vanadium master alloy containing vanadium 4.5%, drop in the smelting furnace of 770 ℃ and carry out melting;
2) every 20 minutes to smelting furnace in Melt Stirring once, stir altogether 4 times;
3) temperature of melt in smelting furnace is controlled to 740 ℃, by the chemical composition of sampling mold sampling analysis melt, before sampling, sampling mold is heated to 500 ℃, the melt in smelting furnace is fully stirred, in the centre of smelting furnace, the degree of depth 1/2nd places sample;
4) analyze qualified after, melt is imported to standing furnace while stirring, melt is warming up to 780 ℃ by standing furnace before importing standing furnace, with nitrogen, powder refining agent is blown into and in melt, makes refining treatment rapidly, refining agent consumption is 1.2 kgs/tonne, passing into nitrogen pressure is 0.4Mpa, thereby obtains the higher aluminium liquid of clarity;
5) after refining after standing 15 minutes, casting immediately.
Embodiment 2
A preparation method who prevents vananum segregation, comprises the steps:
1) select the aluminium vanadium master alloy containing vanadium 5.5%, drop in the smelting furnace of 770 ℃ and carry out melting;
2) every 20 minutes to smelting furnace in Melt Stirring once, stir altogether more than 5 times;
3) temperature of melt in smelting furnace is controlled at more than 740 ℃, by the chemical composition of sampling mold sampling analysis melt, before sampling, sampling mold is heated to 500 ℃, the melt in smelting furnace is fully stirred, in the centre of smelting furnace, the degree of depth 1/2nd places sample;
4) analyze qualified after, melt is imported to standing furnace while stirring, melt is warming up to 790 ℃ by standing furnace before importing standing furnace, with nitrogen, powder refining agent is blown into and in melt, makes refining treatment rapidly, refining agent consumption is 1.2 kgs/tonne, passing into nitrogen pressure is 0.05Mpa, thereby obtains the higher aluminium liquid of clarity;
5) after refining after standing 15 minutes, casting immediately.
Embodiment 3
A preparation method who prevents vananum segregation, comprises the steps:
1) select the aluminium vanadium master alloy containing vanadium 5%, drop in the smelting furnace of 770 ℃ and carry out melting;
2) every 20 minutes to smelting furnace in Melt Stirring once, stir altogether more than 5 times;
3) temperature of melt in smelting furnace is controlled to 750 ℃, by the chemical composition of sampling mold sampling analysis melt, before sampling, sampling mold is heated to 450 ℃, the melt in smelting furnace is fully stirred, in the centre of smelting furnace, the degree of depth 1/2nd places sample;
4) analyze qualified after, melt is imported to standing furnace while stirring, melt is warming up to 780 ℃ by standing furnace before importing standing furnace, with nitrogen, powder refining agent is blown into and in melt, makes refining treatment rapidly, refining agent consumption is 1.2 kgs/tonne, passing into nitrogen pressure is 0.4Mpa, thereby obtains the higher aluminium liquid of clarity;
5) after refining after standing 15 minutes, casting immediately.
Technical scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, and the technology distortion that every technical scheme according to the present invention is made, within all falling into protection scope of the present invention.
Claims (3)
1. a preparation method who prevents vananum segregation, is characterized in that, comprises the steps:
1) select the aluminium vanadium master alloy containing vanadium 4.5-5.5%, drop in the smelting furnace of 760-770 ℃ and carry out melting;
2) every 20 minutes to smelting furnace in Melt Stirring once, stir altogether more than 3 times;
3) temperature of melt in smelting furnace is controlled at more than 740 ℃, by the chemical composition of sampling mold sampling analysis melt;
4) analyze qualified after, melt is imported to standing furnace while stirring, with nitrogen, powder refining agent is blown in melt and makes refining treatment rapidly, refining agent consumption is 1.2 kgs/tonne, passing into nitrogen pressure is 0.05～0.4Mpa, thereby obtains the higher aluminium liquid of clarity;
5) after refining after standing 15 minutes, casting immediately.
2. the preparation method who prevents vananum segregation according to claim 1, it is characterized in that: before described step 3) sampling, sampling mold is heated to 400-500 ℃, melt in smelting furnace is fully stirred, and in the centre of smelting furnace, the degree of depth 1/2nd places sample.
3. the preparation method who prevents vananum segregation according to claim 1, is characterized in that: described step 4) melt is warming up to standing furnace more than 780 ℃ before importing standing furnace.
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| CN201310742079.0A CN103725907A (en) | 2013-12-30 | 2013-12-30 | Preparation method capable of preventing segregation of vanadium-aluminum alloy |
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| CN201310742079.0A CN103725907A (en) | 2013-12-30 | 2013-12-30 | Preparation method capable of preventing segregation of vanadium-aluminum alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107904458A (en) * | 2017-11-23 | 2018-04-13 | 张永 | A kind of method for preventing ZL208 aluminium alloys from producing segregation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01165731A (en) * | 1987-12-22 | 1989-06-29 | Nkk Corp | Manufacture of v-al alloy |
| CN101705395A (en) * | 2009-10-29 | 2010-05-12 | 四川大学 | Vanadium-contained aluminum and aluminum alloy, and preparation methods thereof |
| CN101818270A (en) * | 2009-11-02 | 2010-09-01 | 兰州理工大学 | Method for preparing vanadium-aluminum alloy material |
| CN102127658A (en) * | 2011-03-31 | 2011-07-20 | 新疆众和股份有限公司 | Method for preparing high-purity aluminum-vanadium intermediate alloy |
-
2013
- 2013-12-30 CN CN201310742079.0A patent/CN103725907A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01165731A (en) * | 1987-12-22 | 1989-06-29 | Nkk Corp | Manufacture of v-al alloy |
| CN101705395A (en) * | 2009-10-29 | 2010-05-12 | 四川大学 | Vanadium-contained aluminum and aluminum alloy, and preparation methods thereof |
| CN101818270A (en) * | 2009-11-02 | 2010-09-01 | 兰州理工大学 | Method for preparing vanadium-aluminum alloy material |
| CN102127658A (en) * | 2011-03-31 | 2011-07-20 | 新疆众和股份有限公司 | Method for preparing high-purity aluminum-vanadium intermediate alloy |
Non-Patent Citations (1)
| Title |
|---|
| 杜科选等: "《铝电解和铝合金铸造生产与安全》", 31 May 2012, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107904458A (en) * | 2017-11-23 | 2018-04-13 | 张永 | A kind of method for preventing ZL208 aluminium alloys from producing segregation |
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Application publication date: 20140416 |