Abstract:
This paper first
confirms, by means of microscopic analysis, that primary
carbides of high manganese steel are formed during
solidification in liquid-quenching test and that the carbides
can grow with the formation of branched facets because of the
activated trace elements oxygen and sulphur adsorbed on the
growth interface. The carbide is lath-shaped under a slight
supercooling. By adding some modifying agents, the lathy carbide
will turn into nodular shape because of the decrease in the
content of oxygen and sulphur distributed on the growth
interface of carbide and the increase in the amount of
supercooling. These results will provide a theoritical and
experimental basis for developing new type manganese steels.
Key words:
Liquid-quenching Carbide Modification
Manuscript received on March 19, 1991; revised manuscript
November 15, 1991
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