CN1061279C - Method for producing Fe-Al or Fe-3Al metal meta-compound elements - Google Patents
Method for producing Fe-Al or Fe-3Al metal meta-compound elements Download PDFInfo
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- CN1061279C CN1061279C CN96118708A CN96118708A CN1061279C CN 1061279 C CN1061279 C CN 1061279C CN 96118708 A CN96118708 A CN 96118708A CN 96118708 A CN96118708 A CN 96118708A CN 1061279 C CN1061279 C CN 1061279C
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- Prior art keywords
- compound
- powder
- fe2al5
- feal3
- iron
- Prior art date
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 title claims description 7
- 239000002184 metal Substances 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000000843 powder Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 22
- 229910021328 Fe2Al5 Inorganic materials 0.000 claims abstract description 19
- 239000004411 aluminium Substances 0.000 claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910015392 FeAl3 Inorganic materials 0.000 claims abstract description 15
- 229910015370 FeAl2 Inorganic materials 0.000 claims abstract description 12
- 150000001875 compounds Chemical class 0.000 claims abstract description 10
- 150000002736 metal compounds Chemical class 0.000 claims abstract description 7
- 239000007791 liquid phase Substances 0.000 claims abstract description 6
- 229910000765 intermetallic Inorganic materials 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 238000005245 sintering Methods 0.000 claims description 14
- 210000001161 mammalian embryo Anatomy 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 4
- 239000011812 mixed powder Substances 0.000 claims description 4
- 238000004663 powder metallurgy Methods 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 2
- 239000004615 ingredient Substances 0.000 abstract 1
- 229910017372 Fe3Al Inorganic materials 0.000 description 16
- 229910015372 FeAl Inorganic materials 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000005266 casting Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- GALOTNBSUVEISR-UHFFFAOYSA-N molybdenum;silicon Chemical compound [Mo]#[Si] GALOTNBSUVEISR-UHFFFAOYSA-N 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000001778 solid-state sintering Methods 0.000 description 1
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- Powder Metallurgy (AREA)
Abstract
The present invention relates to a method for manufacturing a Fe-Al or Fe-3Al metal-compound element by powder metallurgy, which comprises: firstly, melting pure ferrum and pure aluminium to obtain a compound powder of Fe2Al5, FeAl2 or FeAl3; proportionally adding a pure ferrous powder, and mixing the pure ferrous powder with the compound powder; then pressing and forming the powders at a normal temperature, and adopting liquid phase to sinter to obtain a required element. The present invention has the advantages of simple process, low manufacturing cost, and high density and uniform ingredient of elements.
Description
The invention belongs to field of powder metallurgy, is a kind of method of making iron aluminium or Fe3Al intermetallic compound part.
Iron aluminium (FeAl) in iron-Al series metal compounds and iron three aluminium (Fe3Al) compound have many good performances, as light specific gravity, higher intensity and enough toughness, good oxidation-resistance and corrosion stability etc.But owing to be subjected to the restriction of existing manufacturing process, so far and fail to be widely used.
The method of making FeAl or Fe3Al intermetallic compound part at present mainly contains following three kinds:
1, with an amount of iron and aluminium fusing, be cast into FeAl or Fe3Al ingot casting, the method by mechanical workout is processed into required part again.This method is owing to must adopt a series of special thermal processing methods to eliminate casting flaw, and follow-up machining amount is big, difficulty is higher, so the technology of this method is complicated, cost is very high.
2, at first melt an amount of iron and aluminium, make FeAl or Fe3Al powder, adopt powder metallurgy method to pass through compacting, sintering acquisition FeAl or Fe3Al embryo spare again.This method is owing to be solid state sintering, and the density of sintered part is lower, so also must improve its density by heat pressing process.Obviously, adopt pressure sintering to make technology become complicated, and manufacturing cost is also higher.
3, the method for stretching certainly: be pressed into embryo spare after an amount of iron powder and aluminium powder mixed, be heated to certain temperature then, make between these two kinds of pure metal powders to react, directly generate required FeAl or Fe3Al intermetallic compound part.Reaction between iron, aluminium is thermopositive reaction, and its speed of response is very fast again, so the temperature variation in the reaction process is very fast, makes the emitting of restive powder surface adsorbed gas in the actually operating, the expansion between different tissues, shrink also inhomogeneous.Still there are many cavities in the material of reaction back gained, and the distortion of embryo spare is also bigger.Eliminate its defective so also must adopt hot-press method.
The purpose of this invention is to provide a kind of technology is simple, manufacturing cost the is lower manufacturing FeAl or the method for Fe3Al intermetallic compound part.
The objective of the invention is to realize by following approach: the manufacturing iron aluminium that is provided or the method for Fe-3 Al metal meta-compound elements are:
1〉produces Fe2Al5 or FeAl3 or FeAl2 metal compound powders;
2〉press the atomic ratio of required iron aluminium or Fe-3 Al metal meta-compound with straight iron powder and preceding fast Fe2Al5 or FeAl2 or FeAl3 metal compound powders and an amount of surface protection, mix lubricant;
3〉under the normal temperature above-mentioned mixed powder is pressed into the pressure embryo of required part,
4〉above-mentioned pressure embryo is carried out liquid phase sintering, promptly obtain required intermetallic compound part.
The present invention adopts indirect mode to make FeAl or Fe3Al intermetallic compound part according to the characteristics of iron-Al series metal compounds, promptly select for use Fe2Al5 or FeAl3 or FeAl2 metallic compound as intermediate compound earlier, again it is mixed with straight iron powder, compacting, sintering.Compare with the existing method of directly obtaining FeAl or Fe3Al part with iron, aluminium, simple, the low cost of manufacture of technology not only, but also following advantage is arranged: 1. the prices of raw and semifnished materials are cheap.Fe2Al5, FeAl3 or FeAl2 metallic compound are highly brittle, so can adopt traditional mechanical means that its ingot casting is crushed to fine powder, also can adopt traditional atomization to obtain their fine powder certainly.2. the present invention utilizes the fusing point of Fe2Al5, FeAl3 or FeAl2 metallic compound low than pure iron, and their atomic ratio has the characteristics of certain gap again with the atomic ratio of FeAl and Fe3Al, adopted liquid phase sintering, (under sintering temperature, Fe2Al, FeAl2 or FeAl3 are molten into liquid phase in short-term).Therefore, the part density that is obtained is very high, and composition is even.3. most of reaction heat is emitted when obtaining Fe2Al5, FeAl3 or FeAl2 compound powder with iron, aluminium, is significantly reduced by reaction heat in the process of Fe2Al5, FeAl3 or FeAl2 and pure iron reaction generation FeAl or Fe3Al.Therefore, sintering process of the present invention is more steady, easily control (as heat-up rate, liquid phase quantity etc.), not only guaranteed required density, and can guarantee to press embryo in sintering process, to shrink evenly, thus can directly obtain more accurate part shape, significantly reduced follow-up amount of machining.
In sum, technology of the present invention is simple, manufacturing cost is lower, and can obtain high-quality part, for new approach has been opened up in the widespread use of FeAl and Fe3Al intermetallic compound.In addition, indirect method provided by the present invention also can be applicable to the manufacturing of some other intermetallic compound part.As: nickel-aluminium system, can select for use the Ni2AL3 powder to mix and make Ni3AL or NiAL part with the Ni powder; Molybdenum-silicon system, iron-silicon system also can adopt similar method.
Example one
Make the cylindrical component of FeAl3 intermetallic compound, its diameter and highly be 30mm, the atomic percent that requires aluminium is 28% (atomic percent of Fe3Al can change within the specific limits).
1〉will make the Fe2Al5 ingot casting, (also can add alloying elements such as a spot of Mo, Cr, B when melting as required) after iron, the aluminium fusing;
2〉broken Fe2Al5 ingot casting, and carry out ball milling, obtain the Fe2Al5 fine powder of granularity less than 15 μ m;
3〉with straight iron powder and above-mentioned Fe2Al5 powder and an amount of surface protection, mix lubricant, wherein the weight ratio of straight iron powder and Fe2Al5 powder is 71: 29; Surface protection, lubricant select paraffin, and its amount is about 0.6% of gross weight.
4〉at normal temperatures above-mentioned mixed powder is pressed into the pressure embryo, pressing force is 100-200MPa;
5〉will press embryo sintering under protective atmosphere, sintering temperature is 1300-1380 ℃, and the time is 20 minutes, promptly gets required Fe3Al compound elements behind the sintering.
Example two
Make FeAl intermetallic compound cylindrical component, the atomic percent that requires aluminium is 40%.
1〉produces the Fe2Al5 powder by example one;
2〉straight iron powder is mixed with Fe2Al5 powder and an amount of paraffin, the weight ratio of iron powder and Fe2Al5 powder is 55: 45;
3〉mixed powder is pressed into embryo under 100-200MPa pressure, and under protective atmosphere sintering, promptly get required part.Sintering temperature is 1200-1290 ℃, and the time is 20 minutes.
The present invention the most handy Fe2Al5 or FeAl3 compound powder when making FeAl intermetallic compound part mix with iron powder, so that make the iron powder of adding occupy enough ratios.
Basic identical with technological process and above-mentioned example that FeAl2 or FeAl3 make Fe3Al or FeAl intermetallic compound as intermediate compound of the present invention.
Claims (2)
1, make the method for iron aluminium or Fe-3 Al metal meta-compound elements, it is characterized in that:
1〉produces Fe2Al5 or FeAl3 or FeAl2 metal compound powders;
2〉press the atomic ratio of required iron aluminium or Fe-3 Al metal meta-compound with straight iron powder and aforementioned Fe2Al5 or FeAl2 or FeAl3 metal compound powders and an amount of surface protection, mix lubricant;
3〉under the normal temperature above-mentioned mixed powder is pressed into the pressure embryo of required part,
4〉above-mentioned pressure embryo is carried out liquid phase sintering, promptly obtain required intermetallic compound part.
2, the method for claim 1 is characterized in that mixing with straight iron powder with Fe2AL5 or FeAl3 compound powder when making the intermetallic Fe-Al compound part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96118708A CN1061279C (en) | 1996-06-21 | 1996-06-21 | Method for producing Fe-Al or Fe-3Al metal meta-compound elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96118708A CN1061279C (en) | 1996-06-21 | 1996-06-21 | Method for producing Fe-Al or Fe-3Al metal meta-compound elements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1169346A CN1169346A (en) | 1998-01-07 |
| CN1061279C true CN1061279C (en) | 2001-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96118708A Expired - Fee Related CN1061279C (en) | 1996-06-21 | 1996-06-21 | Method for producing Fe-Al or Fe-3Al metal meta-compound elements |
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| CN (1) | CN1061279C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984110B (en) * | 2010-12-07 | 2013-02-13 | 株洲硬质合金集团有限公司 | Preparation method of pre-alloy powder of ferrum-aluminum intermetallic compound Fe2Al5 |
| US11149331B2 (en) * | 2019-08-15 | 2021-10-19 | GM Global Technology Operations LLC | Aluminum iron alloy having at least two phases |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041135A (en) * | 1988-09-16 | 1990-04-11 | 长春市粉末冶金厂 | Trolley bus collector-block produced via iron-based powder metallurgy |
| CN1049120A (en) * | 1986-09-30 | 1991-02-13 | 苏联科学院狭窄的宏观动力学研究所 | Produce the method for synthetic materials |
| CN1014502B (en) * | 1990-08-18 | 1991-10-30 | 张华� | Fast welding flux |
| CN1056832A (en) * | 1990-05-22 | 1991-12-11 | 杨洋 | The production technology of iron-based and iron-copper bi-metal products |
-
1996
- 1996-06-21 CN CN96118708A patent/CN1061279C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049120A (en) * | 1986-09-30 | 1991-02-13 | 苏联科学院狭窄的宏观动力学研究所 | Produce the method for synthetic materials |
| CN1041135A (en) * | 1988-09-16 | 1990-04-11 | 长春市粉末冶金厂 | Trolley bus collector-block produced via iron-based powder metallurgy |
| CN1056832A (en) * | 1990-05-22 | 1991-12-11 | 杨洋 | The production technology of iron-based and iron-copper bi-metal products |
| CN1014502B (en) * | 1990-08-18 | 1991-10-30 | 张华� | Fast welding flux |
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| Publication number | Publication date |
|---|---|
| CN1169346A (en) | 1998-01-07 |
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