1 Department of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China 2 Department of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
Effect of dissolved niobium on eutectoid transformation behavior
1 Department of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China 2 Department of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
ժҪ The effect of dissolved niobium on the eutectoid transformation behavior in near-eutectoid high-carbon steels has been studied. Dissolved niobium is important in the eutectoid transformation behavior. It increases the eutectoid carbon content significantly (by ~0.0477% per 0.00001% dissolved niobium), increases the hardenability of steel markedly, yields finer, more uniform, polygonal proeutectoid ferrite, induces a transition in morphology of eutectoid cementite from lamellar to somewhat spheroidal, and increases the misorientation angle of pearlite colonies from being focused near 0�� to near 60��.
Abstract��The effect of dissolved niobium on the eutectoid transformation behavior in near-eutectoid high-carbon steels has been studied. Dissolved niobium is important in the eutectoid transformation behavior. It increases the eutectoid carbon content significantly (by ~0.0477% per 0.00001% dissolved niobium), increases the hardenability of steel markedly, yields finer, more uniform, polygonal proeutectoid ferrite, induces a transition in morphology of eutectoid cementite from lamellar to somewhat spheroidal, and increases the misorientation angle of pearlite colonies from being focused near 0�� to near 60��.
2017, Vol. 24 
