Grain refinement of non-magnetic austenitic steels during asymmetrical hot rolling process
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2017年第12期
论文作者：Changsheng Li Biao Ma Yanlei Song Jianjun Zheng Jikai Wang
文章页码：1572 - 1576
摘 要：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.
Changsheng Li，Biao Ma，Yanlei Song，Jianjun Zheng，Jikai Wang
State Key Laboratory of Rolling and Automation, Northeastern University
摘 要：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.
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