吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (4): 1195-1199.doi: 10.13229/j.cnki.jdxbgxb201504025

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Experiment and simulation on quenching interface heat transfer coefficient of high-strength boron steel

ZHANG Zhi-qiang1, JIA Xiao-fei1, ZHAO Yong2, LI Xiang-ji2   

  1. 1.College of Materials Science and Engineering, Jilin University, Changchun 130022,China;
    2.Roll Forging Institute, Jilin University, Changchun 130022, China
  • Received:2014-02-26 Online:2015-07-01 Published:2015-07-01

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Abstract: Interface Heat Transfer Coefficient (IHSC) between blank and tools is the key factor to obtain the temperature field, stress and strain fields and microstructure distribution of boron steel hop stamping parts. By measuring the temperature changes of the blank and die in the process of quenching combined with finite element analysis and the inverse heat transfer model, the relationship between the interface heat transfer coefficient and temperature was obtained. The results show that IHSC ranges from 1970 W/(m2·K) to 3960 W/(m2·K) when the temperature of the blank decreases from 770 ℃ to 200 ℃. IHTC decreases as the temperature of the blank decreases. However, the release of latent heat during the transformation from austenite to martensite results in the discontinuity of IHTC at 420 ℃. The distribution of IHTC is almost the same under different environmental temperatures and quenching mediums. The IHTC values of the die surface temperature as quenching medium are higher than those at the location 1 mm below the surface of the die.

Key words: metal material, boron steel, hot stamping, interface heat transfer coefficient, inverse heat transfer model

CLC Number: 

  • TG156.3
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