학술논문
Heat treatment effect on formation of ferrite layer of phosphate coated steels
Document Type
Conference
Author
Source
2017 International Conference on Applied System Innovation (ICASI) Applied System Innovation (ICASI), 2017 International Conference on. :1845-1848 May, 2017
Subject
Language
Abstract
A white surface soft layer of phosphate coated steels, obtained after the quenching and tempering for increase strength, is a problem in the cold formed parts. This paper discusses the heat treatment effect including atmosphere on the microstructural changes of the phosphate coated steels for clarify the mechanism to the formation of this white layer. A phosphorus-rich ferrite layer can be easily observed in the phosphate coated steel, when they are quenched and tempered using an atmosphere containing carbon atoms. The combination of the surface layer hardness of 230 HV and substrate hardness of 600 HV was obtained in the quenched and tempered specimen.