The Fe-rich corner of the metastable C-Cr-Fe liquidus surface |
| |
Authors: | Warren R Thorpe Bruno Chicco |
| |
Affiliation: | (1) Division of Manufacturing Technology, Adelaide Laboratory, CSIRO, Leeds Crescent, Woodville North, 5012 South Australia, Australia |
| |
Abstract: | The liquidus surface of the C-Cr-Fe system has been experimentally determined in the Fe-rich region —C ≤6 wt pct, Cr ≤40 wt
pct —using a sensitive differential thermal analysis technique, along with optical and scanning electron microscopy and X-ray
diffraction. Previous liquidus surfaces for this system have differed on the extent of the (Cr,Fe)23C6 liquidus field, with one version reporting its existence at ∼20 wt pet Cr, and others finding that it did not occur at Cr
levels of less than ∼60 wt pct. The present investigation provides evidence in favor of the second contention, with the (Cr,Fe)23C6 field not being detected at Cr ≤40 wt pct. Changes are proposed to the accepted liquidus surface in respect of the compositions
of the invariant reactions—L + αδFe ⇌γFe + (Cr,Fe)7C3 andL + (Cr,Fe)7C3 ⇌γFe + (Fe,Cr)3C —and of the monovariant eutectic valley—L⇌ γFe + (Cr,Fe)7C3. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|