Metallurgically bonding inserts in a casting

Details Metallurgically bonding inserts in a casting Metallurgically bonding inserts in a casting

B - Operations, Transporting

22

D

B22D 19/08 (2006.01) B22D 19/00 (2006.01) F02F 1/24 (2006.01)

Patent

CA 2125482

2125482 9311896 PCTABS00022 Processes for coating a ferrous or aluminum article, such as an engine cylinder liner insert (20), to provide a metallurgical bond with aluminum alloy material cast around the article. The article surface (26) to be bonded is treated to remove impurities, oxides, and foreign materials, and the article is preheated. A molten metallic bonding material, such as zinc or a zinc alloy, is provided and the treated and preheated article is immersed in the bonding material to provide a metallurgically bonded coating on the surface of the article being treated. The coated article, either shortly after coating or, alternatively, after having been cooled to ambient temperature and stored, can then be placed in a mold and molten aluminum alloy poured around it to metallurgically bond the aluminum to the coating on the article. The resulting structure provides a metallurgical bond that has improved heat transfer characteristics and improved structural integrity.

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