Abstract
Transformation fearutes of sintered Cr-Mo steel (Fe-1 %Cr-0.2%Mo-0.35%C) containing frro-molyb-denum powder as an alloying additive were studied, and compared with those of which made from metallic molybdenum powder or molybdenum carbide powder. Distribution of molybdenum in each specimen was also examined quantitatively by EPMA.
The microstructures of molybdenum segregated area of the specimen containing ferro-molybdenum were similar to those of the specimen containing metallic molybdenum. On the other hand, the region of bainite formation in the CCT diagram was extended to longer cooling time, and similar to that of the specimen containing molybdenum carbide.
These results were discussed from the aspect of the relationship between the heterogeneity of molybdenum and the microstructures.
