Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – By providing – treating or protecting environment – e.g. – vacuum
Patent
1989-05-17
1990-04-17
Rutledge, L. Dewayne
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
By providing, treating or protecting environment, e.g., vacuum
266235, 266233, C21C 710
Patent
active
049173596
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 honogeneous 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.
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Ichikawa Kiyoshi
Ishizuka Satoshi
Yamamoto Shinji
Agency of Industrial Science & Technology
Rutledge L. Dewayne
Schumaker David
Suzuki Motor Co. Ltd.
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