吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (6): 1716-1722.doi: 10.13229/j.cnki.jdxbgxb201406028

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Strength and hardness prediction based on cooling rate for hot forming high strength steel

YING Liang1, 2, DAI Ming-hua1, 2, HU Ping1, 2, FAN Zheng-shuai2, SHEN Guo-zhe2, SHI Dong-yong3   

  1. 1.State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China;
    2.School of Automotive Engineering, Dalian University of Technology, Dalian 116024, China;
    3.Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China
  • Received:2013-07-22 Online:2014-11-01 Published:2014-11-01

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Abstract: This paper investigates the effect of partitioned cooling on the mechanical strength and hardness of hot forming steel based on the flat tool cooling test. An exponential model of the mechanical strength-hardness-cooling rate was established using the dimensional analysis method, and this model was validated to be effective. By writing the user subroutine, this model was introduced into the prediction program in the self-developed software KMAS_HF platform to validate the hardness and strength prediction of U-shape hot forming product. Results show that the model is reliable and applicable in predicting the mechanical properties of hot forming products, which can be used to guide the optimization of hot forming process and the design of hot forming tools.

Key words: metal material, divided stage cooling, strength-hardness exponential model, dimension inverse method, numerical prediction

CLC Number: 

  • TG376.2
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