Experimental Study of Microstructure Evolution during Tempering of Quenched Steel and Its Application
来源期刊：材料热处理学报2004年第5期
论文作者：CHEN Nan SHI Wei YAO Ke-fu WANG Hong-peng
关键词：tempering; microstructure evolution; forgings; residual stress;
摘 要：Microstructure evolution during tempering of quenched steel was studied via dilatometric experiments.Temperature ranges of transformation were determined by a relative dilation curve. The thermal expansion coefficient of quenched steel was defined as a function of temperature. The transformation expansion is determined by subtracting thermal expansion from a measured diameter dilation curve. A kinetic equation based on tempering parameter was proposed to predict the microstructure evolution fraction of martensite and bainite of Ni3.5CrMoV and C45 steel. The kinetic equation was used in an in-house FEM code. The internal stress evolution of a quenched generator rotor was investigated.
CHEN Nan1，SHI Wei1，YAO Ke-fu1，WANG Hong-peng1
(1.Mechanical Engineering Department, Tsinghua University, Beijing 100084, P.R. China)
摘要:Microstructure evolution during tempering of quenched steel was studied via dilatometric experiments.Temperature ranges of transformation were determined by a relative dilation curve. The thermal expansion coefficient of quenched steel was defined as a function of temperature. The transformation expansion is determined by subtracting thermal expansion from a measured diameter dilation curve. A kinetic equation based on tempering parameter was proposed to predict the microstructure evolution fraction of martensite and bainite of Ni3.5CrMoV and C45 steel. The kinetic equation was used in an in-house FEM code. The internal stress evolution of a quenched generator rotor was investigated.
关键词:tempering; microstructure evolution; forgings; residual stress;
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