Research on effects of multi-pass rolling and heat treatment of cast Mn18Cr18N steel

Liu Jie; Li Juan

doi:10.7513/j.issn.1004-7638.2022.06.027

Volume 43 Issue 6

Jan. 2023

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Liu Jie, Li Juan. Research on effects of multi-pass rolling and heat treatment of cast Mn18Cr18N steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 180-184. doi: 10.7513/j.issn.1004-7638.2022.06.027

Citation:

Liu Jie, Li Juan. Research on effects of multi-pass rolling and heat treatment of cast Mn18Cr18N steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 180-184. doi: 10.7513/j.issn.1004-7638.2022.06.027

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Research on effects of multi-pass rolling and heat treatment of cast Mn18Cr18N steel

doi: 10.7513/j.issn.1004-7638.2022.06.027

Liu Jie^1
,,
Li Juan²

1.
School of Intelligent Engineering, Jinzhong College of Information, Taigu 030800, Shanxi, China
2.
Taiyuan University of Sciences and Technology , Taiyuan 030024 , Shanxi, China

Received Date: 2021-02-28
Publish Date: 2023-01-13

Abstract

Abstract

Mn18Cr18N electro-slag remelting steel was rolled in three or five passes and subject to solid solution treatment. The microstructure observation by electron back scattering diffraction (EBSD) indicates that with the increase of rolling passes, the recrystallized grains grow along the grain boundaries and distributes into a chain structure, and the high angle grain boundaries gradually migrate to the small angle grain boundaries and then stabilize. A large number of shear deformation bands appear. A larger single pass deformation or a higher final rolling temperature is beneficial to the recrystallization of Mn18Cr18N as-cast austenitic stainless steel after rolling. After solid solution treatment,the grain becomes fine due to increasing annealing twin grain and static recrystallization. With the increase of rolling passes, the tensile strength is increased from 950 MPa to 1090 MPa, and elongation after fracture decreases from 43.46% to 29.55%. After the solid solution treatment, the tensile strength decreases from 904 MPa for 3-passes to 870 MPa for 5-passes, with the strength decreasing; and the elongation after fracture increases from 42% to 48% accordingly. The results showes that the solid solution treatment can improve the microstructure and properties of the material.
- Mn18Cr18N steel,
- rolling passes,
- solution treatment,
- microstructure,
- mechanical properties

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References(11)

References

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