Precipitation and temperature field simulation of high molybdenum non-magnetic steel during isothermal deformation

doi:10.13251/j.issn.0254-6051.2023.06.028

Abstract

Abstract: Temperature field of water cooling process in the isothermal deformation process of a high molybdenum non-magnetic steel was simulated by the DEFORM finite element simulation software, and the sensitive precipitation temperature range of the precipitated phases was obtained with the thermal insulation test of the tested steel, and the types of precipitated phases in the isothermal deformation process were studied. The results show that the sensitive precipitation temperature range is 700-900 ℃. According to the simulation results, the maximum temperature difference of the surface and the center of the specimen is 300 ℃, and it is considered that the center exists a high temperature zone close to the sensitive precipitation temperature range in the water cooling process, resulting that the risk of precipitation is greatly increased. The isothermal deformation process has a promoting effect on the nucleation and growth of the precipitated phases, and the precipitated phase in the isothermal deformed specimen and as-aged specimen is determined to be Cr₂₃C₆ according to the XRD diffraction pattern calibration.

Key words: non-magnetic steel, temperature field, precipitates, isothermal deformation

CLC Number:

TG161

Jiang Yiming, Qu Huapeng, Lang Yuping, Feng Hanqiu, Chen Haitao, Li Xiangming. Precipitation and temperature field simulation of high molybdenum non-magnetic steel during isothermal deformation[J]. Heat Treatment of Metals, 2023, 48(6): 156-161.

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