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THE EFFECT OF SOURCES OF PIG IRON UPON THE ENAMELING OF CAST IRON
Author(s) -
Manson M. E.
Publication year - 1922
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1922.tb17625.x
Subject(s) - cast iron , pig iron , metallurgy , carbon fibers , materials science , micrograph , composite material , scanning electron microscope , composite number
Cast iron made from certain “northern” pig iron blistered badly, while that made under the same conditions from “southern” pig iron enameled satisfactorily. The use of “northern” iron results in castings with low content of combined carbon although the other constituents usually determined in cast iron were present in about the same quantities as found in cast iron made from “southern” pig iron. Reducing the silicon in the iron made with the “northern” pig iron from 2.80 to 2.30% with a total carbon content of 3.30%, resulted in the elimination of blistering in the enameling operations. Experiments have indicated that cast iron of this type with combined carbon less than 0.15% will develop blistering. However, it has not been definitely determined as yet whether the blistering is due directly to this low carbon content or to the presence of some other constituent not generally determined in a chemical analysis of cast iron. Micrographs are shown of various irons before and after enameling. While these show some differences, it has been impossible to detect the cause for the blistering by means of them. All blistering irons, however, show in the micrographs characteristic dark blotches which have not as yet been identified.