Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
142 words
A method of making a composite material of a hypereutectic Al-Si alloy which comprises the steps of: homogeneously mixing a strengthening material of nonmetallic particles or fibers with the hypereutectic Al-Si alloy melted in a melting furnace contained in a vacuum vessel by means of stirring blades rotated at low speed, dropping the obtained molten composite material of the hypereutectic Al-Si alloy onto a polygonal rotor that rotates a high speed about a horizontal shaft in a heat-resistant vessel, breaking up the primary silicon crystals being formed by spattering the molten composite material with said rotor rotating at high speed and cooling said molten composite material with a cooling means, receiving the spattered semi-fused composite material with said heat-resistant vessel, and making the composite material into a semi-solid mass having a fine-grained homogeneous microstructure by stirring the composite material with said rotor.
Claim 2
Independent Claim
142 words
A method of making a composite material of a hypereutectic Al-Si alloy which comprises the steps of: homogeneously mixing a strengthening material of nonmetallic particles or fibers with the hypereutectic Al-Si alloy melted in a melting furnace contained in a vacuum vessel by means of stirring blades rotated at low speed, dropping the obtained molten composite material of the hypereutectic Al-Si alloy onto a polygonal rotor that rotates a high speed about a horizontal shaft in a heat-resistant vessel, breaking up the primary silicon crystals being formed by spattering the molten composite material with said rotor rotating at high speed and cooling said molten composite material with a cooling means, receiving the spattered semi-fused composite material with said heat-resistant vessel, and making the composite material into a semi-solid mass having a fine-grained homogeneous microstructure by stirring the composite material with said rotor.
Claim 3
Dependent Claim
38 words
A method of making a composite material of a hypereutectic Al-Si alloy according to claim 1, in which the amount of the strengthening material added to the molten alloy is between 3 percent and 8 percent by weight.
Claim 4
Dependent Claim
35 words
A method of making a composite material of a hypereutectic Al-Si alloy according to claim 2, in which particles of graphite is used as the strengthening material of nonmetallic particles added to the molten alloy.
Claim 5
Dependent Claim
36 words
A method of making a composite material of a hypereutectic Al-Si alloy according to claim 2, in which particles of titanium carbide is used as the strengthening material of nonmetallic particles added to the molten alloy.
Claim 6
Dependent Claim
35 words
A method of making a composite material of a hypereutectic Al-Si alloy according to claim 2, in which fibers of graphite are used as the strengthening material of nonmetallic fibers added to the molten alloy.
Claim 7
Dependent Claim
52 words
A method of making a composite material of a hypereutectic Al-Si alloy according to claim 1, in which the surface speed of said rotor is set high enough to reduce the grain size of primary silicon crystals being formed to several microns and achieve homogeneous mixing of the alloy and strengthening material.
Claim 8
Dependent Claim
32 words
A method of making a composite material of a hypereutectic Al-Si alloy according to claim 6, in which the surface speed of said rotor is set between 1 m/sec. and 1,000 m/sec.