EP0210359B1 - Alliage d'aluminium pour la fabrication de poudre présentant des propriétés accrues de résistance à la chaleur - Google Patents
Alliage d'aluminium pour la fabrication de poudre présentant des propriétés accrues de résistance à la chaleur Download PDFInfo
- Publication number
- EP0210359B1 EP0210359B1 EP86106735A EP86106735A EP0210359B1 EP 0210359 B1 EP0210359 B1 EP 0210359B1 EP 86106735 A EP86106735 A EP 86106735A EP 86106735 A EP86106735 A EP 86106735A EP 0210359 B1 EP0210359 B1 EP 0210359B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- aluminium alloy
- powder
- content
- elements
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0408—Light metal alloys
- C22C1/0416—Aluminium-based alloys
Definitions
- the invention relates to an aluminum alloy for the production of powder with increased heat resistance according to the preamble of claim 1.
- a cylindrical capsule made of ductile aluminum sheet with a diameter of 50 mm and a height of 60 mm was filled with the powder, evacuated and welded.
- the filled capsule was then hot pressed at 400 ° C. under a pressure of 250 MPa to the full theoretical density.
- the capsule was removed by mechanical processing and the pressed body was inserted as a press bolt with a diameter of 36 mm into an extrusion press with a reduction ratio of 30: 1 1 and pressed at 400 ° C. to a rod with a diameter of 6.5 mm.
- Test specimens were worked out from the rod to investigate the physical and mechanical properties.
- a test specimen was subjected to a heat treatment at 400 ° C. for 2 hours.
- the Vickers hardness determined afterwards at room temperature was 180 (HV). With a density of only 2.85 g / cm 3 , the tensile strength and yield strength were consistently 50 to 80% higher than that of comparable conventional alloys.
- Example 1 The successive further processing into a strip, a powder and an extruded rod was carried out exactly the same as described in Example 1.
- the original Vickers hardness at room temperature was 200 (HV), after heat treatment at 400 ° C / 2 it was still 180 (HV). This shows that an excellent temperature resistance has been achieved, which indicates a high heat resistance.
- the alloy was melted from corresponding Al / Li, Al / Cr and Al / Zr master alloys and cast into an ingot similar to Example 1.
- the ingot was melted again and brought to a casting temperature of 1,100 ° C.
- the melt was atomized under an inert gas atmosphere of 6 MPa pressure to a powder with an average particle diameter of 30 ⁇ m.
- the powder produced in this way was poured into an aluminum can, which was then evacuated and sealed in a vacuum-tight manner.
- Example 2 Similar to Example 1, the body was compressed and hot pressed. After turning off the can part forming the jacket, the pressed body was heated to a temperature of 450 ° C. and extruded with a reduction ratio of 30: to a round rod at this temperature.
- the entire powder processing was carried out under a protective gas atmosphere.
- Test specimens worked out from the rod gave a density of 2.80 g / cm 3 . After a heat treatment at 400 ° C. for 2 hours, the Vickers hardness at room temperature was 170 (HV), after a further heat treatment at the same temperature it was still 160 (HV) for an additional 50 hours. This suggests a great thermal stability of the structure. The improvement in strength values compared to conventional alloys of the same density was approx. 100%.
- the aluminum alloy can consist of 1.5 to 5 wt.% Li, 4 to 11 wt.% Fe and 1 to 6 wt 5 wt .-% Li, 4 to 7 wt .-% Cr as well as 1 to 4 wt .-% of at least one of the elements V, Mn, Zr, remainder AI exist, wherein it comprises at least 15 wt .-% of the phase AI 3 Li and also contains at least 2.6% by weight of the phase Al 3 Zr or the corresponding intermetallic compounds of Al with V or Mo or with V or Mn as a finely divided dispersoid of at most 0.1 ⁇ m particle diameter.
- the aluminum alloys have a relatively large volume fraction of phases - in particular intermetallic compounds - which cannot be produced using conventional manufacturing methods. These particles, which act as dispersoids, are mainly responsible for the excellent properties of the alloys.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH271385 | 1985-06-26 | ||
CH2713/85 | 1985-06-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0210359A1 EP0210359A1 (fr) | 1987-02-04 |
EP0210359B1 true EP0210359B1 (fr) | 1989-09-20 |
Family
ID=4239922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86106735A Expired EP0210359B1 (fr) | 1985-06-26 | 1986-05-16 | Alliage d'aluminium pour la fabrication de poudre présentant des propriétés accrues de résistance à la chaleur |
Country Status (5)
Country | Link |
---|---|
US (1) | US4765851A (fr) |
EP (1) | EP0210359B1 (fr) |
JP (1) | JPS624850A (fr) |
DE (1) | DE3665740D1 (fr) |
NO (1) | NO862576L (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04187701A (ja) * | 1990-11-20 | 1992-07-06 | Honda Motor Co Ltd | 粉末冶金用アルミニウム合金粉末、圧粉体および焼結体 |
JP4722589B2 (ja) * | 2005-06-30 | 2011-07-13 | 株式会社三井ハイテック | 固定子積層鉄心 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH216204A (de) * | 1937-10-29 | 1941-08-15 | Kommanditgesellschaft Mahle | Aluminium-Legierung, insbesondere für Kolben von Brennkraftmaschinen. |
-
1986
- 1986-05-16 DE DE8686106735T patent/DE3665740D1/de not_active Expired
- 1986-05-16 EP EP86106735A patent/EP0210359B1/fr not_active Expired
- 1986-06-18 US US06/875,733 patent/US4765851A/en not_active Expired - Fee Related
- 1986-06-23 JP JP61146752A patent/JPS624850A/ja active Pending
- 1986-06-25 NO NO862576A patent/NO862576L/no unknown
Also Published As
Publication number | Publication date |
---|---|
US4765851A (en) | 1988-08-23 |
NO862576D0 (no) | 1986-06-25 |
JPS624850A (ja) | 1987-01-10 |
NO862576L (no) | 1986-12-29 |
EP0210359A1 (fr) | 1987-02-04 |
DE3665740D1 (en) | 1989-10-26 |
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