Hot Deformation Characteristic and Optimization of Processing Parameters for 0.1C–18Cr–1Al–1Si Ferritic Heat Resistant Stainless Steel

Abstract

The hot deformation behavior of 0.1C18Cr1Al1Si ferritic heat resistant stainless steel has been investigated in the temperature range of 9001100°C and the strain rate range of 0.011 s ¹1 employing compressive tests. The obtained results have shown that the volume fraction and average size of the AlN phases and (Cr,Fe) 23 C 6 carbides decrease with increasing strain rate. The deformation activation energy is calculated as 332.306 kJ•mol ¹1. Based on the analysis of processing map and microstructure, the optimum processing domain for hot deformation is confirmed as the temperature range of 10451100°C and strain rate range of 0.061 s ¹1 .

Effect of Si on δ‐Ferrite/γ‐Austenite Transformation and M23C6 Precipitation During Solidification of X10CrAlSi18 Ferritic Heat‐Resistant Stainless Steel

“…According to relevant literature reports and thermodynamic equilibrium calculation results, the products at these phase boundaries may be M 23 C 6 carbides with an FCC structure. [ 23 ]…”

“…According to relevant literature reports and thermodynamic equilibrium calculation results, the products at these phase boundaries may be M 23 C 6 carbides with an FCC structure. [23] TEM was utilized to characterize and further elucidate the crystal structures of the aforementioned precipitates, and the results are given in Figure 7. The majority of the precipitates in 0Si FHSS were located near the boundary between δ-ferrite and γ-austenite, as evidenced in the solidification structure of the material.…”