Study on Microstructure and Properties of Carbidic Austempered Ductile Iron (CADI)
As a new kind of engineering structure materials with high strength and toughness, the application of austempered ductile iron is growing widely in the area of automobile, agricultural machinary, mine, rAll way and so on. Whereas, because of voiding role of nodular gtraphite existing in the microstructure, it is shown that the abrasive resistance of ADI is not very satisfied under abrasive wearing conditions. Therefore, in this paper, the microstructure and properties of austempered ductile iron with carbides was studied, which is called CADI. It was proven that the austempering temperature influenced greatly the microstructure, impact toughness, hardness and abrasion resistance of CADI. With increase of austempering temperature, the acicular ferrite becomes thicker and bigger, the impact toughness rises, and the hardness decreases. But there is a complicated effect of austempering temperature on wet abrasion resistance. The CADI grinding ball was cast and the field testing was performed. Compared with low chromium cast iron ball, the wastage of CADI ball is half of that of low chromium cast iron for grinding ore in mill.
nodular iron austemperinq, carbides microstructure properties
Liu Jinhai Li Guolu Zhang Huiyou Bian Boqian Xia Xingchuan Yang Zhaoyu Zeng Yicheng Ye Xuexian
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300132, China Qianxi Aodiai Mechanical Casting Company, Tangshan 064300 , China China ADI Academic Committe, Beijing 100044 , China
国际会议
69th World Foundry Congress(第69届世界铸造会议 WFC 2010)
杭州
英文
423-426
2010-10-16（万方平台首次上网日期，不代表论文的发表时间）