Deformation heat treatment technology of 30MnNbRE steel for oil well pipe based on TMCP

doi:10.13251/j.issn.0254-6051.2024.07.033

Abstract

Abstract: Recrystallization behavior of 30MnNbRE steel for oil well pipe was studied through hot compression test on Gleeble-3500 thermal simulation machine. Based on the PQF process, the TMCP on-line deformation heat treatment process of 30MnNbRE steel was designed and simulated, and the microstructure and mechanical properties were compared with the traditional off-line heat treatment process. The results show that dynamic recrystallization controlled rolling, static recrystallization controlled rolling and non-recrystallization controlled rolling can be used for actual perforation process, continuous rolling process and diameter-fixing process, respectively. Compared with the traditional off-line heat treatment process, the martensitic lath of the 30MnNbRE steel produced by TMCP on-line deformation heat treatment can be refined to 0.536 μm, the NbC size is about 88.9 nm, the yield strength is increased to 1169 MPa, and the impact absorbed energy is increased to 98.7 J.

Key words: 30MnNbRE steel, TMCP, deformation heat treatment, recrystallization, strengthening and toughening

CLC Number:

TG335.7

Tang Xuejiao, Bao Xirong, Wang Xiaodong, Song Cao. Deformation heat treatment technology of 30MnNbRE steel for oil well pipe based on TMCP[J]. Heat Treatment of Metals, 2024, 49(7): 212-219.

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