鉄鋼上へのフェロシリコン-黒鉛複合皮膜形成法

抄録

The purpose of this investigation is to form a graphite-dispersed Fe-Si films on steel by reaction with fused salts containing NaCl, KCl, NaF, Na₂SiF₆, and Si. Optimum operating condition found is as follows; [Composition of fused salts] NaCl:KCl=1:1 (weight ratio), NaF: 22mol%, Na₂SiF₆: 4.9mol%, Na₂SiF₆:Si=1:4.5 (mol ratio), [Reaction temperature] 900°C, [Reaction time] 3hrs. For the film formed on a 0.8% C steel specimen, it was found that the thickness is about 180μm, the Vickers hardness number (Hv) is 700, the amount of deposit is about 35mg/cm², and the friction factor against steel ball is 0.1-0.2.