Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (20권4호 144-153)

Effects of Iron, Silicon and Zinc Contained in Molten Aluminum on Aluminizing of Cast Iron

주철 소지상에 용융알루미늄 도금시 철 규소 및 아연의 영향

최종술;문성욱;
Choi, Chong-Sool;Moon, Sung-Wuck;

연세대학교 공과대학 금속공학과;
Department of Metallurgical Engineering, Yonsei University;

Abstract

In the case of dipping the Ni-Resist cast iron into molten aluminum with iron content, the thickness of intermetallic compound was remarkably increased with increasing iron content. The thickness was shown by following equation in the range of 1-3% iron content; $x=22.5t^{1/2}+4.47{cdot}t{cdot}(Fe%)$. where, x is thickness(${mu}m$), t the time (minute), Fe% the iron w/o. When the Ni-Resist cast iron was dipped into the molten aluminum containing zinc content, the intermetallic compound thickness was also increased with increasing zinc contents. And thickness was represented by the following equation in the range of 2-10% zinc content; $x=3.46t^{1/2}+0.27{cdot}t{cdot}(Zn%)$. However, in the case of dipping the Ni-resist cast iron into molten aluminum with silicon content, the thickness of intermetallic compound was decreased with increasing silicon content, as shown in the following equation; $x=7.17t^{1/2}-0.15{cdot}t{cdot}(Si%)$. The intermetallic compound formed onto Ni-Resist cast iron was identified to be $FeAl_3;and;Fe_3Al$. As the result of hardness measurement, the peak hardness appeared in the intermetallic compound at near interface of the cast iron and the compound.

Keywords