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The Study on the Microstructure and Mechanical Properties of the Nodular Indefinite Chilled Iron Containing Ni  

Baek, Eung-Ryul (School of Materials Science and Engineering, Yeungnam University)
Oh, Seok-Jung (Hyundai-steel Corp.)
Villando, Thursdiyanto (School of Materials Science and Engineering, Yeungnam University)
Publication Information
Journal of Korea Foundry Society / v.26, no.4, 2006 , pp. 180-183 More about this Journal
Abstract
The effects of adding Ni on microstructure and mechanical properties of Nodular Indefinite Chilled Iron (NICI) were studied. Thermal fatigue, hardness, tensile properties, wear resistance, are very important factors for NICI used for hot working roll and wire rod mill. The results show that addition 4% nickel has changed pearlite to bainite. Bainite matrix is superior to pearlite matrix on wear resistance, hardness and strength and will increase performance lifetime of NICI conventional roll material. Based in the bainitic microstructure, hardness and tensile property increase up to 48 HRc and $72\;kg/mm^2$, respectively.
Keywords
NICI; Nickel content; Bainite structure; Hardness; Tensile strength; Roll material;
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