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US4919736A
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Aluminum alloy for abrasion resistant die castings
Assignee: Ryobi Ltd
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Filing: 1988-07-29
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Granted: 1990-04-24
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Expires: 2008-07-29
Abstract
Abstract An aluminum alloy for abrasion resistant die castings comprising by weight, 6.0 to 9.0% Cu, 0.5 to 2.0% Mn, 1.6 to 3.0% Fe, 3% or less Mg, together with 13.5 to 20.0% Si, 0.5% or less Ni, an inevitable impurity of 0.3% or less Sn, and the remainder being Al, prepared by crystallizing out primary Si crystals of Si and Al-Fe-Mn-Si compounds and by forming a solid solution with Cu and Mg in the alloy's matrix.
Inventors
- 👤 Naomi Nishi
- 👤 Yosuke Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:30
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
An aluminum alloy for abrasion resistant die casts consisting essentially of by weight, 6.0 to 9.0% Cu, 0.5 to 2.0% Mn, 1.6 to 3.0% Fe, 3% or less Mg, together with 13.5 to 20.0% Si, 0.5% or less Ni, inevitable impurities and the remainder being Al, prepared by crystallizing out primary Si crystals of Si and Al-Fe-Mn-Si compounds, and by forming a solid solution with Cu and Mg in the alloy's matrix.
Claim 2
Dependent Claim
72 words
An aluminum alloy for abrasion resistant die casts consisting essentially of by weight, 6.0 to 9.0% Cu, 0.5 to 2.0% Mn, 1.6 to 3.0% Fe, 3% or less Mg, together with 13.5 to 20.0% Si, 0.5% or less Ni, inevitable impurities and the remainder being Al, prepared by crystallizing out primary Si crystals of Si and Al-Fe-Mn-Si compounds, and by forming a solid solution with Cu and Mg in the alloy's matrix.
Claim 3
Dependent Claim
21 words
An aluminum alloy according to claim 1, wherein the inevitable impurities comprises 1.0% or less Zn and 0.3% or less Sn.
Claim 4
Dependent Claim
14 words
An aluminum alloy according to claim 1, which further comprises 0.001 to 0.1% P.
Claim 5
Dependent Claim
86 words
An aluminum alloy for abrasion resistant die casts consisting essentially of by weight, 6.0 to 7.1% Cu, 1.1 to 1.7% Mn, 1.7 to 2.8% Fe, 1.0 to 2.2% Mg, 0.4% or less Zn, and 0.05 to 0.1% P, together with 15.2 to 17.5% Si, 0.1% or less Ni, an impurity of 0.3% or less Sn, and the remainder being Al, prepared by crystallizing out primary Si crystals of Si and Al-Fe-Mn-Si compounds, and by forming a solid solution with Cu and Mg in the alloy's matrix.
Claim 6
Dependent Claim
86 words
An aluminum alloy for abrasion resistant die casts consisting essentially of by weight, 6.0 to 7.1% Cu, 1.1 to 1.7% Mn, 1.7 to 2.8% Fe, 1.0 to 2.2% Mg, 0.4% or less Zn, and 0.05 to 0.1% P, together with 15.2 to 17.5% Si, 0.1% or less Ni, an impurity of 0.3% or less Sn, and the remainder being Al, prepared by crystallizing out primary Si crystals of Si and Al-Fe-Mn-Si compounds, and by forming a solid solution with Cu and Mg in the alloy's matrix.
References Cited (Backward Citations)
US4648918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |