CN109913674A - A kind of preparation method of the alumal of aerospace grade high Mn content - Google Patents
A kind of preparation method of the alumal of aerospace grade high Mn content Download PDFInfo
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- CN109913674A CN109913674A CN201910165637.9A CN201910165637A CN109913674A CN 109913674 A CN109913674 A CN 109913674A CN 201910165637 A CN201910165637 A CN 201910165637A CN 109913674 A CN109913674 A CN 109913674A
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Abstract
The present invention provides a kind of preparation methods of the alumal of aerospace grade high Mn content, which is characterized in that includes the following steps: stock, aluminium manganese particle preparation, melting, polishing, extracts sample, detects its chemical component qualification storage.The present invention is in order to improve the content of aluminium manganese intermediate alloy manganese, spherical alumal little particle will be put into magnesia crucible after aluminium and the preliminary alloying of manganese Metal using plasma beam furnace, use intermediate frequency furnace vacuum melting, finally melted alumal ingot is polished, crushes and is prepared into the higher alumal fritter of manganese content, as the intermediate alloy material of the addition of next step titanium alloy preparation.The alumal of high Mn content of the invention has ingredient uniform, crystal grain refinement, the feature of alloy purity is high, moreover it is possible to the loss and oxidation of manganese Metal in preparation process be effectively reduced, production cost significantly reduces.
Description
Technical field
The invention belongs to field of material technology, are related to titanium aluminium manganese intermediate alloy, in particular to a kind of aerospace grade titanium
The preparation method of the aluminium manganese intermediate alloy of alloy high Mn content.
Background technique
In the preparation process of various alloys, need to be added a small amount of alloying element, to reach required chemical component,
Such as need to be added manganese element in aerospace titanium alloy T C1, TC2, but it is to be unable to reach reason that manganese element is added merely
The chemical component thought, and it is not easy to produce.But the manganese element in titanium alloy, the addition alloying of aluminium manganese intermediate alloy can be passed through
Reach the requirement and product quality requirement of chemical component afterwards.
Aluminium manganese intermediate alloy is made of aluminium and manganese element.Currently, manganese content is usual in existing aluminium manganese intermediate alloy material
Less than 15%, belong to low manganese content alloy.This is mainly due to high Mn content aluminium manganese intermediate alloy prepare it is relatively difficult.
The specific gravity 7.4g/cm of manganese3Greater than the specific gravity 2.7g/cm of aluminium3, and 126 DEG C of the fusing point of the manganese fusing point 750- greater than aluminium
950 DEG C, the method for producing alumal at this stage is often that self- propagating legal system takes aluminium manganese intermediate alloy, but this method has centainly
Limitation and certain defect.Self- propagating method requires the granularity of aluminium powder, and granularity need to be small as far as possible, and the source of manganese element is
The oxide of manganese, such as manganese dioxide, mangano-manganic oxide.Self- propagating legal system takes the shortcomings that aluminium manganese intermediate alloy as follows:
1. impurity cannot be removed, need even to be made with electrolytic manganese dioxide using the pyrolusite (manganese dioxide) of the purity former
Material, this method also need to consume aluminium, increase cost；
2. using graphite crucible, the oxygenation carburetting in alloy production；
3. reaction process is more violent, manganese belongs to the active metal of comparison, oxidizable in air, also easily heating when oxygen
Change, and the oxide layer in oxide layer close to metal is MnO, outer layer is then Mn3O4, that is, there is the substance containing manganese of different oxides,
Therefore high Mn content aluminium manganese intermediate alloy difficulty production.
4. there are manganese not to be completely melt in alumal, compound between the aluminium manganese Metal of formation, with coarse piece of web form
In the presence of, and there are the etch pits of tiny beans shape simple substance manganese.
Summary of the invention
The present invention to solve the above problems, provide a kind of preparation method of the alumal of aerospace grade high Mn content,
To improve the content of aluminium manganese intermediate alloy manganese.Proposed adoption plasma beam furnace by after aluminium and the preliminary alloying of manganese Metal by spherical aluminium manganese
Alloy little particle is placed in magnesia crucible, using intermediate frequency furnace vacuum melting, finally melted alumal ingot is polished,
Crush the alumal fritter for being prepared into Gao Meng.
Specific technical solution is:
A kind of preparation method of the alumal of aerospace grade high Mn content, which is characterized in that include the following steps:
1, stock up: choosing purity is Al, 99.7% aluminium and electrolytic manganese metal Mn, quality proportioning Al: Mn=44.5:
55.5；Determine that aluminium manganese quality of material, single furnace aluminium manganese material 20kg are best depending on plasma beam heat size；
2, aluminium manganese particle preparation: the melting of plasma beam furnace is used, plasma beam furnace electric current is 1000A, using inert gas
Protection forms aluminium manganese granule materials after aluminium manganese material gradually melts preliminary alloying；
3, melting: the aluminium manganese granule materials of preliminary alloying are fitted into magnesia crucible, are placed in vacuum intermediate-frequency furnace, are taken out
Vacuum degree≤1Pa surveys leak rate≤1Pa/min, applying argon gas >=0.025MPa, melting vacuum degree≤4Pa；After vacuum degree is qualified
It can carry out melting；Smelting parameter are as follows: first open vacuum intermediate-frequency furnace power 10KW, 20KW is risen to after 3 minutes, then gradually rises function
Rate after aluminium manganese granule materials all fusing, continues to keep 60KW power refining 15 minutes, then reduce power extremely to 60KW
10KW cools down 4 minutes, and band power is cast, and after 4 hours cooling, opens vent valve, aluminium manganese intermediate alloy ingot is come out of the stove；
4, polish: aluminium manganese intermediate alloy ingot casting removes removing oxide layer through polishing, then crushes and 55 alloy block of aluminium manganese is made；
5, sample is extracted, its chemical component qualification storage is detected.
The beneficial technical effect of the present invention lies in:
1, the present invention makes the preliminary alloying of aluminium manganese using the melting of plasma beam furnace, reuses MgO magnesia crucible vacuum
Melting can play the purpose of refining, so that alumal ingredient is uniform, crystal grain refinement obtains the aluminium manganese of good high Mn content
Intermediate alloy.In addition, being not easy oxygenation and carburetting compared with graphite crucible using MgO crucible.
2, the present invention is the preparation method of aerospace aluminium manganese intermediate alloy, and alloy is with high purity, and ingredient is uniform；It can be with
The loss and oxidation of manganese is effectively reduced, overall manufacturing cost significantly reduces.
Specific embodiment
The present invention is described in more detail With reference to embodiment.
By taking aluminium manganese 55 (AlMn55) as an example:
1, stock up: choosing purity is 99.7%Al and electrolytic manganese metal material Mn, and matching is Al: Mn=44.5: 55.5；It is single
Furnace aluminium manganese quality of material 20kg；
2, aluminium manganese particle preparation: the melting of plasma beam furnace is used, plasma beam furnace electric current is 1000A, using inert gas
Protection forms aluminium manganese granule materials after aluminium manganese material gradually melts preliminary alloying；
3, melting: the aluminium manganese granule materials of preliminary alloying are fitted into magnesia crucible, are placed in vacuum intermediate-frequency furnace, are taken out
Vacuum degree surveys leak rate≤1Pa/min, applying argon gas >=0.025MPa, melting vacuum degree≤4Pa to≤1Pa；To vacuum degree qualification
After can carry out melting；Smelting parameter are as follows: first open power 10Kw, 20KW is risen to after 3 minutes, then gradually rise power to 60Kw
After aluminium manganese granule materials all fusing, continue that 60KW power is kept to refine 15 minutes, then reduces power to 10KW, cooling 4
Minute, band power is cast, and after 4 hours cooling, opens vent valve, aluminium manganese intermediate alloy ingot is come out of the stove；
4, polish: aluminium manganese intermediate alloy ingot casting removes removing oxide layer through polishing, then crushes and 55 alloy block of aluminium manganese is made；
5, sample is extracted, its chemical component qualification storage is detected.
Extract aluminium manganese intermediate alloy ingot casting sample survey situation:
It is separately sampled by the upper and lower surfaces to each aluminium manganese intermediate alloy ingot for removing removing oxide layer, it is divided into and extracts
3 aluminium manganese intermediate alloy ingots, 6 sample analysis.
It is as follows to analyze conclusion:
Using the high Mn content aluminium manganese of production technology development and production of the invention it can be seen from the inspection data of table 1-3
Master alloy chemistries test result is stablized, and ingredient fluctuation is very small, and distributed components, value consistency are managed very much
Think, it is almost the same with alloy proportion value.
Table 1: sample one
| Serial number | Al | Mn | Fe | Si | C | O |
| 1 | Surplus | 54.64 | 0.19 | 0.22 | 0.161 | 0.009 |
| 2 | Surplus | 54.98 | 0.18 | 0.21 | 0.13 | 0.005 |
Table 2: sample two
| Serial number | Al | Mn | Fe | Si | C | O |
| 1 | Surplus | 55.42 | 0.21 | 0.18 | 0.09 | 0.003 |
| 2 | Surplus | 55.16 | 0.17 | 0.16 | 0.08 | 0.005 |
Table 3: sample three
| Al | Mn | Fe | Si | C | O | |
| 1 | Surplus | 54.72 | 0.19 | 0.13 | 0.07 | 0.01 |
| 2 | Surplus | 55.13 | 0.16 | 0.17 | 0.14 | 0.008 |
Claims (2)
1. a kind of preparation method of the alumal of aerospace grade high Mn content, which is characterized in that include the following steps:
1), stock up: choosing purity is that Al, 99.7% aluminium and electrolytic manganese metal Mn expect, quality proportioning Al: Mn=44.5:
55.5；
2), aluminium manganese particle preparation: using the melting of plasma beam furnace, and plasma beam furnace electric current is 1000A, is protected using inert gas
Shield can form aluminium manganese granule materials after aluminium and manganese material gradually melted alloy；
3), melting: the aluminium manganese granule materials of preliminary alloying are fitted into magnesia crucible, are placed in vacuum intermediate-frequency furnace, are taken out true
Reciprocal of duty cycle≤1Pa surveys leak rate≤1Pa/min, applying argon gas >=0.025MPa, melting vacuum degree≤4Pa；To vacuum degree qualification rear
It can carry out melting；
Smelting parameter are as follows: first open vacuum intermediate-frequency furnace power 10KW, 20KW is risen to after 3 minutes, then gradually rises power to 60KW
After aluminium manganese granule materials all fusing, continue that 60KW power is kept to refine 15 minutes, then reduces power to 10KW, cooling 4
Minute, band power is cast, and after 4 hours cooling, opens vent valve, aluminium manganese intermediate alloy ingot is come out of the stove；
4), polish: aluminium manganese intermediate alloy ingot casting removes removing oxide layer through polishing, then crushes and 55 alloy block of aluminium manganese is made；
5) sample, is extracted, its chemical component qualification storage is detected.
2. a kind of preparation method of the alumal of aerospace grade high Mn content as described in claim 1, which is characterized in that
Plasma beam furnace melting is packed into aluminium manganese quality of material 20kg.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921212A (en) * | 2021-02-01 | 2021-06-08 | 上海澜唐实业有限公司 | High-strength die-casting aluminum alloy capable of being anodized and colored and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008056785A1 (en) * | 2006-11-10 | 2008-05-15 | Toyota Jidosha Kabushiki Kaisha | Manganese-base alloy and process for production thereof |
| CN102634697A (en) * | 2012-05-02 | 2012-08-15 | 上海康臣特种金属材料有限公司 | Aluminum-manganese intermediate alloy and preparation method thereof |
| CN103409669A (en) * | 2013-08-13 | 2013-11-27 | 桂林电子科技大学 | MnAl alloy magnetic absorbing material and preparation method thereof |
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- 2019-02-24 CN CN201910165637.9A patent/CN109913674A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008056785A1 (en) * | 2006-11-10 | 2008-05-15 | Toyota Jidosha Kabushiki Kaisha | Manganese-base alloy and process for production thereof |
| CN102634697A (en) * | 2012-05-02 | 2012-08-15 | 上海康臣特种金属材料有限公司 | Aluminum-manganese intermediate alloy and preparation method thereof |
| CN103409669A (en) * | 2013-08-13 | 2013-11-27 | 桂林电子科技大学 | MnAl alloy magnetic absorbing material and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921212A (en) * | 2021-02-01 | 2021-06-08 | 上海澜唐实业有限公司 | High-strength die-casting aluminum alloy capable of being anodized and colored and preparation method thereof |
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Application publication date: 20190621 |