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pISSN : 1598-706X / eISSN : 2288-8381


한국주조공학회지 (26권4호 180-183)

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

Ni 함유 NICI(Nodular Indefinite Chilled Iron) 의 미세조직과 기계적성질에 관한 연구

Eung-Ryu Baek, Seok-Jung Oh*, Thursdiyanto Villando

Yeungnam University, *Hyundai-steel Corp.


The effects o f adding N i on microstructure and mechanical properties o f 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 w ill increase performance lifetime o f NICI conventional roll material. Based in the bainitic microstructure, hardness and tensile property increase up to 48 HRc and 72 kg/mm2, respectively.


NICI, Nickel content, Bainite structure, Hardness, Tensile strength, Roll material.