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	Development of boron white cast iron
	Li, Y. X. ; Liu, Z. L. ; Chen, X.
	2010-05-10 ; 2010-05-10
会议名称	INTERNATIONAL JOURNAL OF CAST METALS RESEARCH ; 10th Asian Foundry Congress 2008 ; Nagoya, PEOPLES R CHINA ; Web of Science
关键词	White cast iron Boron Wear resistant Metallurgy & Metallurgical Engineering
中文摘要	With boron substituting for carbon in cast iron composition and eutectic borides substituting for eutectic carbides in microstructure as the hard wear resistant phase, a new kind of wear resistant white cast iron has been developed. The microstructure and mechanical properties of this new white cast iron both in the as cast state and after appropriate heat treatments were studied. The results show that the as cast microstructure of the boron white cast iron comprises a dendritic matrix and interdendritic eutectics, and the eutectic compound is that of M2B or M'90.9Cr1.1B0.9 type, where M represents Fe, Cr or Mn and M' represents Fe or Mn. The morphology of the eutectic borides is much like that of carbide in high chromium white cast iron, but the hardness of boride is higher than that of carbide. The matrix in as cast microstructure comprises martensite and pearlite. After austenitising and quenching, the matrix mostly changes to lath type martensite and the eutectic borides remain unchanged. In addition, two different sizes of particles, with different forming processes during heat treatment, appear in the matrix. The boron white cast iron possesses higher hardness and toughness than conventional white cast iron and nickel hard white cast iron, and has a better balance between hardness and toughness than high chromium white cast iron.
会议录出版者	MANEY PUBLISHING ; LEEDS ; STE 1C, JOSEPHS WELL, HANOVER WALK, LEEDS LS3 1AB, W YORKS, ENGLAND
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/19086]
专题	清华大学
推荐引用方式 GB/T 7714	Li, Y. X.,Liu, Z. L.,Chen, X.. Development of boron white cast iron[C]. 见:INTERNATIONAL JOURNAL OF CAST METALS RESEARCH, 10th Asian Foundry Congress 2008, Nagoya, PEOPLES R CHINA, Web of Science.

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