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| Study on Hot Deformation Behavior and Hot Processing Map of H13 Steel Containing Rare Rarth |
| ZHAO Zhengyang1,2, SUN Mingyue2, SUN Jianliang1
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1 National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004;
2 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 |
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Abstract H13 steel containing rare earth was compressed at the temperature of 900-1 200 ℃ and the strain rate of 0.01-10 s-1 by the Gleeble-3800 thermal-mechanical simulator. The constitutive equation and hot processing map of the rare earth H13 steel at high temperature were established according to the obtained flow stress. Meanwhile, the microstructure of the compressed specimens were analyzed by optical microscope. The flow stress showed that the rare earth H13 steel had a discontinuous dynamic recrystallization behavior at the large strain rate and the stress of the rare earth H13 was elevated obviously. The thermal activation energy of the rare earth H13 steel was 573 kJ/mol. The suitable processing parameter of the rare earth H13 steel was within 1 050-1 200 ℃ and the strain rate was within the range of 0.01-0.1 s-1. Therefore, the addition of rare earth has broadened the scope of the hot processing parameters.
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Published: 02 May 2018
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2017, Vol. 31 
