Transformation kinetics of 0Cr16Ni5Mo1 martensitic stainless steel during continuous cooling

doi:10.13251/j.issn.0254-6051.2021.10.002

Abstract

Abstract: Based on the dilatometric curves and combined with microstructure characterization and hardness test, the continuous cooling transformation kinetics and microstructure evoluation of the 0Cr16Ni5Mo1 martensitic stainless steel was investigated. The results show that after austenitizing at 1100 ℃ for 60 min, only the martensitic transformation occurs when cooled at 0.5-100 ℃/s, the Ms and Mf temperature are about 212 ℃ and 25.3 ℃ respectively, the microstructure is lath martensite, and the hardness is about 371 HV, which means the cooling rate has no obvious effect on them. The Koistinen-Marburger equation can be used to describe the martensitic transformation, and the transformation kinetic parameter α is about 0.0317.

Key words: 0Cr16Ni5Mo1 martensitic stainless steel, microstructure, transformation kinetics, CCT curves

CLC Number:

TG151.2

Song Yisi, Li Chuanwei, Chen Yihua, Li Ke, Hu Haipeng, Gu Jianfeng. Transformation kinetics of 0Cr16Ni5Mo1 martensitic stainless steel during continuous cooling[J]. Heat Treatment of Metals, 2021, 46(10): 12-17.

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