Emissivity Calibration and Temperature Measurement of High Strength Steel Sheet in Hot Stamping Process

Abstract:

In order to meet the requirements of improving hot stamping process, the temperature distribution of high strength steel (HSS) sheets should be observed. However, the accurate measurement of temperature field in transfer where the temperature falls rapidly proves to be difficult due to the limitation of thermocouple. The infrared thermography could be used for accurate measurement of temperature field but the emissivity which is crucial to the accuracy and reliability of measurement results is not available. In this paper, a method to calibrate emissivity of HSS blank was developed for temperature measurement in hot stamping using infrared thermography. Experiments were performed on the emissivity calibration of the HSS Advanced 1500 in hot stamping. Emissivity dependence on temperature was investigated, so was the impact of little variation in emissivity on the temperature measurement. The validation tests were made and the results reveal that this calibration method of emissivity is accurate and feasible. This method is also appropriate for the calibration of emissivity in other temperature measurement situations.

• Periodical: Applied Mechanics and Materials (Volumes 148-149)
• Pages: 1473-1477
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.148-149.1473
• Online since: December 2011
• Authors: Hong Qing Li, Yi Sheng Zhang, Liang Wang, Xiao Wei Tian, Chao Wang, Bin Zhu
• Keywords: Calibration, Emissivity, High Strength Steel (HSS), Hot Stamping, Infrared Thermography (IRT), Temperature Measurement

References

[1] Karbasian, H., Tekkaya, A. E, A review on hot stamping, Journal of Materials Processing Technology. 15(2010) 2103-2118.

DOI: 10.1016/j.jmatprotec.2010.07.019

[2] Chao Wang, B. Z., Yisheng Zhang, Jie Shi, Han Dong, Hot-Stamping Process Simulation and Optimize Research for Collision Beam of Automobile Door, Advanced Materials Research. 3(2011) 201 - 203.

DOI: 10.4028/www.scientific.net/amr.201-203.3

[3] Komanduri, R., Hou, Z. B, A review of the experimental techniques for the measurement of heat and temperatures generated in some manufacturing processes and tribology, Tribology International. 34(2001) 653-682.

DOI: 10.1016/s0301-679x(01)00068-8

[4] Naderi, M., Ketabchi, M., Abbasi, M., Bleck, W. Analysis of microstructure and mechanical properties of different high strength carbon steels after hot stamping, Journal of Materials Processing Technology. 211(2011) 1117-1125.

DOI: 10.1016/j.jmatprotec.2011.01.015

[5] Chang-Da, W. Investigation of steel emissivity behaviors: Examination of Multispectral Radiation Thermometry (MRT) emissivity models, International Journal of Heat and Mass Transfer. 53(2010) 2035-(2043).

DOI: 10.1016/j.ijheatmasstransfer.2009.12.053

[6] Zhu, B., Zhang, Y., Li, J., Wang, H., Ye, Z, Simulation research of hot stamping and phase transition of automotive high strength steel, Materials Research Innovations. 15(2011) 426-430.

DOI: 10.1179/143307511x12858957675435

[7] Del Campo, L., Pérez-Sáez, R. B., González-Fernández, L., Esquisabel, X., et al. Emissivity measurements on aeronautical alloys, Journal of Alloys and Compounds. 489(2010) 482-487.

DOI: 10.1016/j.jallcom.2009.09.091

[8] Tadeusz, W. Emissivity measurements on electronic microcircuits, Measurement. 41(2008) 503-515.

[9] Meca Meca, F. J., Rodrı́guez Sanchez, F. J., Sanchez, P. M. n, Calculation and optimisation of the maximum uncertainty in infrared temperature measurements taken in conditions of high uncertainty in the emissivity and environment radiation values, Infrared Physics & Technology. 43(2002).

DOI: 10.1016/s1350-4495(02)00125-1