2010•Shandong MetallurgyRequires access

Research on Phase Transformation Behavior of 07MnNiMoVDR Steel during Continuous Cooling

Xiao Feng-qiang

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Abstract

The dynamic CCT curves of 07MnNiMoVDR steel were determined by means of MMS-200 thermomechanical simulator.The phase transformation behavior and microstructure were investigated during continuous cooling.The results showed that with the cooling rate increase,the microstructure transformed gradually from ferrite and pearlite to bainite;and with different cooling rate,two phase transitions existed in the CCT diagram,that is,the pro-eutectoid ferrite and pearlite transformation area at low cooling rate and the bainite transformation area at middle cooling rate.

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The dynamic CCT curves of 07MnNiMoVDR steel were determined by means of MMS-200 thermomechanical simulator.The phase transformation behavior and microstructure were investigated during continuous cooling.The results showed that with the cooling rate increase,the microstructure transformed gradually from ferrite and pearlite to bainite;and with different cooling rate,two phase transitions existed in the CCT diagram,that is,the pro-eutectoid ferrite and pearlite transformation area at low cooling rate and the bainite transformation area at middle cooling rate.

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Available abstract

The dynamic CCT curves of 07MnNiMoVDR steel were determined by means of MMS-200 thermomechanical simulator.The phase transformation behavior and microstructure were investigated during continuous cooling.The results showed that with the cooling rate increase,the microstructure transformed gradually from ferrite and pearlite to bainite;and with different cooling rate,two phase transitions existed in the CCT diagram,that is,the pro-eutectoid ferrite and pearlite transformation area at low cooling rate and the bainite transformation area at middle cooling rate.

Key concepts: Continuous cooling transformation, Pearlite, Bainite, Materials science, Ferrite (magnet), Microstructure, Eutectic system, Metallurgy

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