Correction to: Effect of Solution Treatment on Grain Growth and Precipitates in Electroslag Remelted 15Cr-22Ni Iron-Base Superalloy

The effects of solution temperature and soaking time on the grain growth and precipitates in a novel iron-base superalloy were investigated. Abnormal grain growth occurs at the solution temperature of 1473 K (1200 °C) irrespective of the niobium content and soaking time, which is attributed to the dissolution and coarsening of NbC precipitates. The amount of NbC particles increases with increasing niobium content of the superalloy, which has a strong pinning effect on grain boundary migration. Fe 2 Nb-type Laves phase is fully dissolved in the superalloy containing 0.64 and 1.00 mass pct Nb, whereas eutectic carbide NbCs are partially dissolved regardless of the solution temperatures. Both Fe 2 Nb-type Laves phase and eutectic carbide NbC are partially dissolved in the superalloy with 1.40 mass pct Nb after the solution at 1443 K (1170 °C) because of the competitive dissolution of Fe 2 Nb-type Laves phase and eutectic carbide NbC. The amount of eutectic carbides NbC after the solution at 1473 K (1200 °C) is larger than that at 1443 K (1170 °C) because of higher soluble niobium content in the superalloy matrix contributed by the complete dissolution of Fe 2 Nb-type Laves phase. A model for predicting the austenite grain growth of the superalloy with varying niobium contents during solution is developed. The role of niobium on the hardness of the superalloy was discussed.