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Effect of Ultrasonic Treatment on the Solidification Structure of High Carbon Steel Containing Rare Earth Elements
Author(s) -
LI Jie,
CHEN Weiqing,
LIU Qing,
WANG Xiaofeng
Publication year - 2008
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200806138
Subject(s) - ultrasonic sensor , rare earth , materials science , ultrasound , dendrite (mathematics) , carbon fibers , cavitation , ultrasound treatment , metallurgy , crystal structure , composite material , crystallography , acoustics , chemistry , geometry , physics , composite number , mathematics
The influence of ultrasonic treatment on solidification structure of high carbon steel with the addition of rare earth Ce was investigated. Effects of various ultrasonic power and treatment time on the solidification structure were studied. The results showed that ultrasonic treatment could obviously refine the solidification structure of high carbon steel containing rare earth Ce. With increasing ultrasonic power, a more refined structure could be obtained. When the ultrasonic power exceeded a certain degree, the effects of ultrasound on structure refinement were not increased significantly. Dendrites developed in the solidifying structure when the ultrasonic treatment times were 0 s and 20 s. However, a uniform and refined dendrite structure was obtained after ultrasonic treatment for 40 s. The solidification structure refinement of high carbon steel containing Ce was ascribed to the increased amount and decreased size of rare earth oxides and oxysulfides by ultrasonic cavitation, which could serve as heterogeneous nuclei of a new crystal phase.