Carbo-Nitrogen Sulphide in Steel Containing Titanium

Abstract

The structure and composition of a titanium carbo-nitrogen sulphide in steels have been determined by means of X-ray diffraction, electron diffraction and electron-probe microanalysis.
The carbo-nitrogen sulphide has a structure similar to that of TiP with a dimension of hexagonal unit cell of α=3.210Å, c= 11.20Å, and c/a= 3.49. Its chemical formula is shown by Ti₄ (C_m, N_n) ₂S₂, where m+n= 1. The ratio of m to n depends on the chemical composition, solidification condition and thermal history of steels.
The carbo-nitrogen sulphide is chemically stable as to be extracted from various steels containing titanium by mineral acid-dissolution and electrolytic methods using these acids, but decomposes gradually in hot mineral acids and oxidizing reagents.