US4867806A
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Heat-resisting high-strength Al-alloy and method for manufacturing a structural member made of the same alloy
Assignee: Honda Motor Co Ltd
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Filing: 1988-05-31
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Granted: 1989-09-19
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Expires: 2008-05-31
Abstract
Abstract Al-alloy containing Si, Fe, Cu and Mg and at least one kind of Mn and Co in the basic composition range of 8.0</=Si</=30.0 wt. %, 2.0</=Fe</=33.0 wt. %, 0.8</=Cu</=7.5 wt. %, 0.3</=Mg</=3.5 wt. %, 0.5</=Mn</=5.0 wt. % and 0.5</=Co</=3.0 wt. %, are provided in a powder state. A sindered member formed of these Al-alloys has a high strength and reveals excellent heat-resistivity and stress corrosion cracking resistivity. A structural member made of the sintered all-alloy is manufactured through the steps of subjecting a powder press-shaped body formed at a temperature of 350 DEG C. or lower and at a pressure of 1.5 DIFFERENCE 5.0 ton/cm2 to hot extrusion working at a temperature of 300 DEG DIFFERENCE 400 DEG C. to form a raw material for forging, and then forge shaping the raw material at a temperature of 300 DEG DIFFERENCE 495 DEG C.
Inventors
- 👤 Haruo Shiina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:08
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/16; C; C22; C22C; C22C1/00; C22C1/04; C22C1/0408; C22C1/0416; C22C21/00; C22C21/02; C22C21/04; B22F2998/00; B22F2998/10; F; F02; F02F; F02F2200/00; F02F2200/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
186 words
A method for manufacturing a structural member made of a heat-resisting, high-strength sintered Al-alloy comprising the steps of: providing a molten Al-alloy consisting essentially of: 8.0≦Si≦30 wt.%, 2.0≦Fe≦33.0 wt.%, 0.8≦Cu≦7.5 wt.%, 0.3≦Mg≦3.5 wt.%, and 0.5≦Mn≦5.0 wt.% and/or 0.5≦Co≦3.0 wt.%, the remaining being Al and inevitable impurities; quenching and solidifying said molten Al-alloy at a cooling speed of 10 3 ° C./sec or higher to obtain an Al-alloy powder; press-shaping said Al-alloy powder at a temperature of 350° C. or lower and at a shaping pressure of 1.5 to 5.0 ton/cm 2 to obtain a raw material for extrusion having a density ratio of 70% or higher; extruding said raw material for extrusion at a temperature of 300° to 400° C. and at an extension ratio of 5 or higher to obtain a raw material for forging; charging said raw material for forging into a metal mold that has been pre-heated to temperature of 150° C. to 450° C.; forge-shaping said raw material for forging in said metal mold at a temperature of 300° to 495° C. to obtain a forge-shaped body; and cooling the forge-shaped body.
Claim 2
Independent Claim
186 words
A method for manufacturing a structural member made of a heat-resisting, high-strength sintered Al-alloy comprising the steps of: providing a molten Al-alloy consisting essentially of: 8.0≦Si≦30 wt.%, 2.0≦Fe≦33.0 wt.%, 0.8≦Cu≦7.5 wt.%, 0.3≦Mg≦3.5 wt.%, and 0.5≦Mn≦5.0 wt.% and/or 0.5≦Co≦3.0 wt.%, the remaining being Al and inevitable impurities; quenching and solidifying said molten Al-alloy at a cooling speed of 10 3 ° C./sec or higher to obtain an Al-alloy powder; press-shaping said Al-alloy powder at a temperature of 350° C. or lower and at a shaping pressure of 1.5 to 5.0 ton/cm 2 to obtain a raw material for extrusion having a density ratio of 70% or higher; extruding said raw material for extrusion at a temperature of 300° to 400° C. and at an extension ratio of 5 or higher to obtain a raw material for forging; charging said raw material for forging into a metal mold that has been pre-heated to temperature of 150° C. to 450° C.; forge-shaping said raw material for forging in said metal mold at a temperature of 300° to 495° C. to obtain a forge-shaped body; and cooling the forge-shaped body.
Claim 3
Dependent Claim
188 words
A structural member made from heat-resistant, high-strength Al-alloy, said structural member being prepared by a process comprising the steps of: providing a molten Al-alloy consisting essentially of: 8.0≦Si≦30 wt.%, 2.0≦Fe≦33.0 wt.%, 0.8≦Cu≦7.5 wt.%, 0.3≦Mg≦3.5 wt.%, and 0.5≦Mn≦5.0 wt.% and/or 0.5≦Co≦3.0 wt.%, the remaining being Al and inevitable impurities; quenching and solidifying said molten Al-alloy at a cooling speed of 10 3 ° C./sec or higher to obtain an Al-alloy powder; press-shaping said Al-alloy powder at a temperature of 350° C. or lower and at a shaping pressure of 1.5 to 5.0 ton/cm 2 to obtain a raw material for extrusion having a density ratio of 70% or higher; extruding said raw material for extrusion at a temperature of 300° to 400° C. and at an extrusion ratio at 5 or higher to obtain a raw material for forging; charging said raw material for forging into a metal mold that has been pre-heated to temperature of 150° C. to 450° C.; forge-shaping said raw material for forging in said metal mold at a temperature of 300° to 495° C. to obtain a forge-shaped body; and cooling the forge-shaped body.
Claim 4
Dependent Claim
188 words
A structural member made from heat-resistant, high-strength Al-alloy, said structural member being prepared by a process comprising the steps of: providing a molten Al-alloy consisting essentially of: 8.0≦Si≦30 wt.%, 2.0≦Fe≦33.0 wt.%, 0.8≦Cu≦7.5 wt.%, 0.3≦Mg≦3.5 wt.%, and 0.5≦Mn≦5.0 wt.% and/or 0.5≦Co≦3.0 wt.%, the remaining being Al and inevitable impurities; quenching and solidifying said molten Al-alloy at a cooling speed of 10 3 ° C./sec or higher to obtain an Al-alloy powder; press-shaping said Al-alloy powder at a temperature of 350° C. or lower and at a shaping pressure of 1.5 to 5.0 ton/cm 2 to obtain a raw material for extrusion having a density ratio of 70% or higher; extruding said raw material for extrusion at a temperature of 300° to 400° C. and at an extrusion ratio at 5 or higher to obtain a raw material for forging; charging said raw material for forging into a metal mold that has been pre-heated to temperature of 150° C. to 450° C.; forge-shaping said raw material for forging in said metal mold at a temperature of 300° to 495° C. to obtain a forge-shaped body; and cooling the forge-shaped body.
Claim 5
Dependent Claim
35 words
A method for manufacturing a structural member made of a heat-resisting, high-strength sintered Al-alloy as claimed in claim 1 wherein intermetallic compounds contained in said Al-alloy powder have a size of 10 μm or less.
Claim 6
Dependent Claim
27 words
A method for manufacturing a structural member made of heat-resisting high-strength sintered Al-alloy as claimed in claim 1, in which said structural member is a connecting rod.
Claim 7
Dependent Claim
26 words
A method for manufacturing a structural member made of heat-resisting high-strength sintered Al-alloy as claimed in claim 1, in which said structural member is a piston.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |