Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1988-03-30
1989-09-12
Rutledge, L. Dewayne
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
148415, 420528, 420590, 428614, C22C 109, C22C 110
Patent
active
048658081
ABSTRACT:
An easy method and apparatus to eliminate casting defects from composite materials of hypereutectic Al-Si alloys and improve their properties. The product composite materials with primary silicon crystals of several microns have fine homogeneous microstructures and mechanical properties comparable to similar materials produced by the conventional powder metallurgy technology. Highly wear-resistant composite materials, in which the hypereutectic Al-Si alloy and strengthening material are homogeneously mixed, can be obtained with ease. The hypereutectic Al-Si alloy and strengthening material are homogeneously mixed by stirring blades rotated at low speed. The obtained molten composite alloy rotated at high speed about a horizontal shaft in a heat-resistant vessel. The rotor rotating and stirring at high speed spatters the molten composite alloy material to break up the crystallizing out primary silicon crystals. The rotor stirs the spattered semi-solid composite alloy material received by the heat-resistant vessel. A resulting semi-solid mass having a fine-grained homogeneous microstructure is recovered as the final product.
REFERENCES:
patent: 3951651 (1976-04-01), Mehrabian et al.
patent: 3954455 (1976-05-01), Flemings et al.
patent: 4636355 (1987-01-01), Ichikawa
Ichikawa Kiyoshi
Ishizuka Satoshi
Yamamoto Shinji
Agency of Industrial Science and Technology
Rutledge L. Dewayne
Schumaker David
Suzuki Motor Co. Ltd.
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