Asymmetrical hot rolling（ASHR） was proposed to acquire productive grain refinement for Fe-20Mn-4Al-0.3C and Fe-18Cr-18Mn-0.5N non-magnetic austenitic steels. The intensive additional shear deformation caused by ASHR...Asymmetrical hot rolling（ASHR） was proposed to acquire productive grain refinement for Fe-20Mn-4Al-0.3C and Fe-18Cr-18Mn-0.5N non-magnetic austenitic steels. The intensive additional shear deformation caused by ASHR promotes the nucleation of recrystallization and grain refining of steel plates. With the speed ratio of 1.2, the austenitic grains were refined to ~5 m on the surface, the recrystallization fraction was enhanced to ~34.7%, and the thickness of fine-grained surface layer increases to ~450m for Fe-20Mn-4Al-0.3 C steel. The Fe-18Cr-18Mn-0.5N steel also exhibited an effective surface grain refinement with an average size of ~3μm, and the recrystallization fraction reached ~76.9% at the speed ratio of 1.15.展开更多
基金financially supported by the National Natural Science Foundation of China(Grant No.51274062)the Research Fund for the Doctoral Program of Higher Education of China(Grant No.20130042110040)
文摘Asymmetrical hot rolling（ASHR） was proposed to acquire productive grain refinement for Fe-20Mn-4Al-0.3C and Fe-18Cr-18Mn-0.5N non-magnetic austenitic steels. The intensive additional shear deformation caused by ASHR promotes the nucleation of recrystallization and grain refining of steel plates. With the speed ratio of 1.2, the austenitic grains were refined to ~5 m on the surface, the recrystallization fraction was enhanced to ~34.7%, and the thickness of fine-grained surface layer increases to ~450m for Fe-20Mn-4Al-0.3 C steel. The Fe-18Cr-18Mn-0.5N steel also exhibited an effective surface grain refinement with an average size of ~3μm, and the recrystallization fraction reached ~76.9% at the speed ratio of 1.15.
