Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (27권5호 303-311)

A study on the growth rate of the carbide layer formed by the reactive deposition

반응석출법에 의한 탄화물 피복속도에 관한 연구

남기석;변응선;이구현;김도훈;

한국기계연구원 재료공정연구부;연세대학교 금속공학과;

Abstract

In this study, the factors, such as coating temperature T(K), reaction time t(sec) and mobile carbon content $C^*$ (wt%) of steels affecting, the growth rate of carbide layer were investigated in the reactive deposition and diffusion coating using the fluidized bed. From the results, the coating thickness d(cm) can be expressed by an equation. d=$C^*$$(KT)^{1/2}$, where K=K$circ$exp(~Q/RT), KTEX>$circ$ = 1.4$ imes$$10^{-2}cm^{-2}$/sec, and Q=46Kcal/ mol. It was in a good aggrement with the experimental results, reguardless of the diffusion coating method and the carbide layer. Therefore, if the mobile carbon content of carbon steels and alloyed steels is known, the thickness under coating conditions can be predicted from the previous equation.

Keywords