Abstract
An investigation has been made of the forms of chromium compounds in hot-rolled rimmed steel sheets containing 0.02-0.1% Cr.
The results observed are summarized as follows:
(1) Besides chromium in solid solution, chromium was identified both in oxide, (FeMn) O·Cr2O3, which is coarse particle, and sulfide, FeS·Cr2S3, which is fine particle, and no chromium and carbide and nitride were found.
(2) The amount of (FeMn) O·Cr2O3 increases in proportion to the increase in total Cr content while the amount of FeS Cr2S3 is determined mainly by sulfur content regardless of chromium content.
