EP0110064A1
Expired / Lapsed
EP
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Heat-resistant light alloy articles and method of manufacturing same
Assignee: Toyota Motor Corp
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Filing: 1983-10-06
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Granted: —
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Expires: 2003-10-06
Abstract
Abstract @ Light alloy articles comprising a body (1) of light alloy having a composite layer (2) of heat-resistant fibers and light alloy and bonded to said body, and a surface layer (3) of heat-resisting alloy sprayed onto said composite layer (2) exhibit improved integrity and heat resistance when the heat-resisting alloy is plasma sprayed onto one surface of a preform of fibers and the light alloy is then cast to the opposite surface of the preform such that an interfacial layer (4) is defined between the composite layer (2) and the surface layer (3) in which the fibers and light alloy are integrally incorporated with the heat-resisting alloy.
Inventors
- 👤 Tadashi Donomoto
- 👤 Atsuo Tanaka
- 👤 Yoshiaki Tatematsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 07:08
CPC Classifications
C; C22; C22C; C22C47/00; C22C47/02; C22C47/06; B; B22; B22D; B22D19/00; B22D19/0009; B22D19/14; C22C47/08; C23; C23C; C23C28/00; F; F02; F02B; F02B77/00; F02B77/02; F02F; F02F3/00; F02F3/10; F02F3/12; B22F; B22F2998/00; C22C2204/00; F02B3/00; F02B3/06; F02F2200/00; F02F2200/04; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/028; F05C2201/04; F05C2201/0433; F05C2201/0448; F05C2253/00; F05C2253/16; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/937; Y10T; Y10T428/00; Y10T428/12; Y10T428/12444; Y10T428/12451; Y10T428/12472; Y10T428/12486; Y10T428/12493; Y10T428/12729; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
117 words
A heat-resistant light alloy article comprising a body of a light alloy, a composite layer formed on and bonded to said body, the composite layer consisting essentially.. of a light alloy of the same type as the light alloy of which said body is made and heat-resistant fibers having a lower heat conductivity than the light alloy, said fibers being integrally bonded by the light alloy, and a surface layer of a heat-resisting alloy sprayed onto said composite layer, wherein an interfacial layer is defined between said composite layer and said surface layer in which the sprayed heat-resisting alloy of said surface layer is integrally incorporated with the fibers and the light alloy of said composite layer.
Claim 2
Dependent Claim
117 words
A heat-resistant light alloy article comprising a body of a light alloy, a composite layer formed on and bonded to said body, the composite layer consisting essentially.. of a light alloy of the same type as the light alloy of which said body is made and heat-resistant fibers having a lower heat conductivity than the light alloy, said fibers being integrally bonded by the light alloy, and a surface layer of a heat-resisting alloy sprayed onto said composite layer, wherein an interfacial layer is defined between said composite layer and said surface layer in which the sprayed heat-resisting alloy of said surface layer is integrally incorporated with the fibers and the light alloy of said composite layer.
Claim 3
Dependent Claim
22 words
The article according to claim 1 wherein said light alloy is selected from the group consisting of aluminum alloys and magnesium alloys.
Claim 4
Dependent Claim
40 words
The article according to claim 1 wherein said fiber is selected from the group consisting of fibers of alumina, silica-alumina and silicon carbide, fibers of tungsten and stainless steel, and whiskers of alumina, silicon carbide, silicon nitride and potassium titanate.
Claim 5
Dependent Claim
28 words
The article according to claim 1 wherein said heat-resisting alloy is selected from the group consisting of stainless steel, Ni-Cr alloy, Ni-Al alloy, Ni-Cr-Al alloy, and Ni-Cr-Al-Y alloy.
Claim 6
Dependent Claim
17 words
The article according to claim 1 wherein said composite layer is 2 mm to 30 mm thick.
Claim 7
Dependent Claim
17 words
The article according to claim 1 wherein said surface layer is 10 µm to 5 mm thick.
Claim 8
Dependent Claim
27 words
The article according to claim 1 wherein the concentration of fibers in said composite layer increases continuously from its boundary with the body toward the surface layer.
Claim 9
Dependent Claim
27 words
The article according to claim 1 wherein the concentration of fibers in said composite layer increases stepwise from its boundary with the body toward the surface layer.
Claim 10
Independent Claim
102 words
A method for producing a heat-resistant light alloy article comprising the steps of spraying a heat-resisting alloy onto one surface of a preform of heat-resistant fibers, placing the sprayed preform in a mold cavity such that the sprayed layer is in contact with the cavity bottom, pouring a molten light alloy into the mold cavity, and subjecting the molten light alloy in the mold cavity to liquid metal forging, thereby causing the light alloy to fill up spaces amongs the fibers, interstices between the fibers and the sprayed alloy, and voids in the sprayed alloy substantially within the confines of the preform.
Claim 11
Independent Claim
102 words
A method for producing a heat-resistant light alloy article comprising the steps of spraying a heat-resisting alloy onto one surface of a preform of heat-resistant fibers, placing the sprayed preform in a mold cavity such that the sprayed layer is in contact with the cavity bottom, pouring a molten light alloy into the mold cavity, and subjecting the molten light alloy in the mold cavity to liquid metal forging, thereby causing the light alloy to fill up spaces amongs the fibers, interstices between the fibers and the sprayed alloy, and voids in the sprayed alloy substantially within the confines of the preform.
Claim 12
Dependent Claim
15 words
The method according to claim 9 which further comprises shaping heat-resistant fibers into the preform.
Claim 13
Dependent Claim
25 words
The method according to claim 10 wherein the heat-resistant fibers are shaped into a disc-like preform having a thickness of 2 mm to 30 mm.
Claim 14
Dependent Claim
18 words
The method according to claim 9 wherein the spraying of heat-resisting alloy is carried out by plasma spraying.
Claim 15
Dependent Claim
25 words
The method according to claim 12 wherein the heat-resisting alloy is sprayed onto the preform surface to a thickness of 10 µm to 5 mm.
Claim 16
Dependent Claim
49 words
The method according to claim 9 which further comprises the steps of allowing the light alloy to solidify to form a block of the light alloy having the composite layer of fiber/ light alloy and the surface layer of sprayed heat-resisting alloy, and removing the block from the mold.
Claim 17
Dependent Claim
41 words
The method according to claim 9 wherein the liquid metal forging is effected by applying a pressure of 500 to 1,500 kg/cm 2 to the molten light alloy in the mold and continuing pressure application until the cast alloy has solidified.
References Cited (Backward Citations)
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