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US4648918A
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Abrasion resistant aluminum alloy
Assignee: Kobe Steel Ltd
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Filing: 1984-09-05
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Granted: 1987-03-10
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Expires: 2004-09-05
Abstract
Abstract An abrasion resistant aluminum alloy characterized in that the aluminum alloy has a chemical composition basically containing 7.5-15 wt % of Si, 3.0-6.0 wt % of Cu, 0.3-1.0 wt % of Mg, 0.25-1.0 wt % of Fe, 0.25-1.0 wt % of Mn, and the balance of Al and impurities, and an alloy structure with a primary Si crystal size smaller than 80 microns, a Si-Mn-Fe compound grain size smaller than 120 microns, and an alpha-Al phase size smaller than 100 microns.
Inventors
- 👤 Kazuhiko Asano
- 👤 Osamu Takezoe
- 👤 Yoshinori Yasuda
- 👤 Kenji Hayashi
- 👤 Masanobu Aoki
- 👤 Yoshio Doi
- 👤 Makoto Shimata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:14
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/02
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
93 words
An abrasion resistant aluminum alloy consisting of 7.5-15 wt. % of Si, 3.0-6.0 wt. % of Cu, 0.3-1.0 wt. % of Mg, 0.25-1.0% of Fe, 0.25-1.0 wt. % of Mn and 0.05-0.4 wt. % of Cr or 0.05-0.25 wt. % of Zr or a mixture of said Cr and said Zr, with the balance being Al and impurities, and having an alloy structure with a primary Si crystal size smaller than 80 microns, a Si-Mn-Fe compound grain size of smaller than 120 microns, and an α-Al phase size of smaller than 100 microns.
Claim 2
Dependent Claim
93 words
An abrasion resistant aluminum alloy consisting of 7.5-15 wt. % of Si, 3.0-6.0 wt. % of Cu, 0.3-1.0 wt. % of Mg, 0.25-1.0% of Fe, 0.25-1.0 wt. % of Mn and 0.05-0.4 wt. % of Cr or 0.05-0.25 wt. % of Zr or a mixture of said Cr and said Zr, with the balance being Al and impurities, and having an alloy structure with a primary Si crystal size smaller than 80 microns, a Si-Mn-Fe compound grain size of smaller than 120 microns, and an α-Al phase size of smaller than 100 microns.
Claim 3
Dependent Claim
80 words
An abrasion resistant aluminum alloy consisting of 7.5-15 wt. % of Si, 3.0-6.0 wt. % of Cu, 0.3-1.0 wt. % of Mg, 0.25-1.0% of Fe, 0.25-1.0 wt. % of Mn and 0.001- 0.05 wt. % of Ti, with the balance being Al and impurities, and having an alloy structure with a primary Si crystal size of smaller than 80 microns, a Si-Mn-Fe compound grain size of smaller than 120 microns, and an α-Al phase size of smaller than 100 microns.
Claim 4
Dependent Claim
80 words
An abrasion resistant aluminum alloy consisting of 7.5-15 wt. % of Si, 3.0-6.0 wt. % of Cu, 0.3-1.0 wt. % of Mg, 0.25-1.0% of Fe, 0.25-1.0 wt. % of Mn and 0.001- 0.05 wt. % of Ti, with the balance being Al and impurities, and having an alloy structure with a primary Si crystal size of smaller than 80 microns, a Si-Mn-Fe compound grain size of smaller than 120 microns, and an α-Al phase size of smaller than 100 microns.
Claim 5
Dependent Claim
146 words
An abrasion resistant aluminum alloy consisting of 7.5-15 wt. % of Si, 3.0-6.0 wt. % of Cu, 0.3-1.0 wt. % of Mg, 0.25-1.0% of Fe, 0.25-1.0 wt. % of Mn, and at least one element selected from the group consisting of less than 0.5 wt. % of B, less than 0.5 wt. % of Mo, less than 0.5 wt. % of Co, less than 0.5 wt. % of Sb, less than 0.5 wt. % of Nb, less than 0.5 wt. % of Pb, less than 0.5 wt. % of Bi, less than 0.5 wt. % of V and less than 1 wt. % of Zn, with the balance being Al and impurities, and having an alloy structure with a primary Si crystal size smaller than 80 microns, a Si-Mn-Fe compound grain size of smaller than 120 microns, and α-Al phase size of smaller than 100 microns.
Claim 6
Dependent Claim
146 words
An abrasion resistant aluminum alloy consisting of 7.5-15 wt. % of Si, 3.0-6.0 wt. % of Cu, 0.3-1.0 wt. % of Mg, 0.25-1.0% of Fe, 0.25-1.0 wt. % of Mn, and at least one element selected from the group consisting of less than 0.5 wt. % of B, less than 0.5 wt. % of Mo, less than 0.5 wt. % of Co, less than 0.5 wt. % of Sb, less than 0.5 wt. % of Nb, less than 0.5 wt. % of Pb, less than 0.5 wt. % of Bi, less than 0.5 wt. % of V and less than 1 wt. % of Zn, with the balance being Al and impurities, and having an alloy structure with a primary Si crystal size smaller than 80 microns, a Si-Mn-Fe compound grain size of smaller than 120 microns, and α-Al phase size of smaller than 100 microns.
Claim 7
Dependent Claim
36 words
The abrasion resistant aluminum alloy of claim 1, wherein said aluminum alloy is produced by subjecting an aluminum alloy ingot to a homogenizing treatment for more than 2 hours at 400°-510° C., followed by indirect extrusion.
Claim 8
Dependent Claim
22 words
The abrasion resistant aluminum alloy of claim 1, wherein said alloy structure has a primary Si crystal size smaller than 70 microns.
Claim 9
Dependent Claim
22 words
The abrasion resistant aluminum alloy of claim 1, wherein said alloy structure has a Si-Mn-Fe compound grain size smaller than 100 microns.
Claim 10
Dependent Claim
18 words
The abrasion resistant aluminum alloy of claim 1, wherein Si is contained in the range of 7.5-13.5 wt%.
Claim 11
Dependent Claim
18 words
The abrasion resistant aluminum alloy of claim 7, wherein Si is contained in the range of 11-13.5 wt%.
Claim 12
Dependent Claim
18 words
The abrasion resistant aluminum alloy of claim 1, wherein Cu is contained in the range of 3.8-4.6 wt%.
Claim 13
Dependent Claim
18 words
The abrasion resistant aluminum alloy of claim 1, wherein Mg is contained in the range of 0.6-0.9 wt%.
Claim 14
Dependent Claim
18 words
The abrasion resistant aluminum alloy of claim 1, wherein Fe is contained in the range of 0.4-0.7 wt%.
Claim 15
Dependent Claim
18 words
The abrasion resistant aluminum alloy of claim 1, wherein Mn is contained in the range of 0.4-0.7 wt%.
Claim 16
Dependent Claim
18 words
The abrasion resistant aluminum alloy of claim 1, wherein Cr is contained in the range of 0.05-0.2 wt%.
Claim 17
Dependent Claim
18 words
The abrasion resistant aluminum alloy of claim 1, wherein Zr is contained in the range of 0.05-0.2 wt%.
Claim 18
Dependent Claim
18 words
The abrasion resistant aluminum alloy of claim 4, wherein the temperature of said homogenizing treatment is 470°-490° C.
Claim 19
Dependent Claim
20 words
The abrasion resistant aluminum alloy of claim 4, wherein the time of said homogenizing treatment is longer than 5 hours.
Claim 20
Dependent Claim
20 words
The abrasion resistant aluminum alloy of claim 4, wherein the temperature of said indirect extrusion is lower than 370° C.
Claim 21
Dependent Claim
22 words
The abrasion resistant aluminum alloy of claim 17, wherein the temperature of said indirect extrusion is in the range of 270°-370° C.
Claim 22
Dependent Claim
20 words
The abrasion resistant aluminum alloy of claim 4, wherein the extrusion ratio of said indirect extrusion is greater than 5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |