Acta Metall Sin  1992, Vol. 28 Issue (1): 85-89    DOI:

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GROWTH MODE AND MODIFICATION OF GRAPHITE IN CAST IRON MELT

LIU Yongkun;YANG Shihao Southwestern Institute of Technology and Engineering; Chongqing; Shandong Polytechnical University; Jinan

LIU Yongkun;YANG Shihao Southwestern Institute of Technology and Engineering; Chongqing; Shandong Polytechnical University; Jinan. GROWTH MODE AND MODIFICATION OF GRAPHITE IN CAST IRON MELT. Acta Metall Sin, 1992, 28(1): 85-89.

Abstract References Related Articles Recommended Metrics Download:  PDF(620KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Using liquid quenching technique, the change of growth mode of graphite in cast iron melt was analysed. Based on the interface structure theory of crystal growth, the concept of multiplication of spiral growth steps was advanced and two basic multiplication models were given out. It was proposed that multiplication of spiral steps is responsible for the changeof growth mode of graphite in cast iron melt. The modifying elements such as cerium promote multiplication of spiral steps, which is regarded as the core of modification. Origination of screwdislocation and branch of the sector blocks in radius direction, both of which are essential to spheroidization of graphite in the melt, are caused by multiplication of spiral steps; and so is thickening of graphite plates. Key words:  graphite      crystallization morphology      growth mode      spiral growth steps      Received:  18 January 1992      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1992/V28/I1/85 1 Hillert M, Lindblom Y. J Iron Steel Inst, 1954; 176: 388 2 Minkoff I, Nixon W C. J Appl Phys, 1966; 37: 4848--4855 3 陈熙琛.机械工程学报,1979;15(2) :122--152 4 Minkoff I,Lux B.见:Lux B, Minkoff I, Mollark F主编,上海工业大学,华中工学院,浙江大学合译.铸铁冶金学.北京:机械工业出版社,1983:315--328 5 Liu P C, Loper C R Jr., Kimura T, Park H K. Trans Am Foundrymen's Soc, 1980; 88: 97--118 6 刘永坤.山东工业大学硕士学位论文,1987 7 Jackson K A. In: Doremus R H, Robert B W, Turnbull D eds., Growth and Perfection of Crystals, Proc Int Conf on Crystal Growth, held Cooperstown, New York, August 27--29, 1958, New York: John Wiley Sons, 1958: 319 8 Purdy G R, Audier M. In: Fredriksson H, Hillert M eds., The Physical Metallurgy of Cast Iron. 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