UHPM - 95
J. Phys. IV France 05 (1995) C7-341-C7-345
Influence of Sulphur and Phophorus on the Hot Deformation of Fe-Cr 13% High Purity SteelM. Lahreche1, B. Bouzabata2 and A. Kobylanski3
1 Direction Recherche Appliquée, E.N. SIDER, Algérie
2 Unité de Recherche : M.M., Université Annaba, Algérie
3 Ecole des Mines, 42023 Saint-Etienne, France
A series of Fe-Cr13%-C high purity steels containing increasing volume fractions of Sulphur (30, 60 and 100ppm) and Phosphorus (30, 60 and 100ppm) were prepared in order to study their hot deformation properties by tensile tests at various strain rates (10-1s-1 to 10-4s-1) and at temperatures from 700°C to 1100°C. It is observed that the hot ductility is lowered at 1000°C with the addition of sulphur. However, this decrease is relatively small (about 30% for l00ppm of sulphur) and quite similar for all additions of sulphur. When phosphorus is added, the embrittlement is along the whole deformed specimen. The usual criteria of ductility by parameter Z do not seem to be sufficient to describe this embrittlement.
© EDP Sciences 1995