Abstract
Hot stamping parts, such as B-pillar, crash beams and bumpers, with the tailored mechanical properties, fulfil the requirements of anti-collision properties of the vehicle. In this work, a resistance heating system was developed in terms of Joule's Law. Local resistance heating was proposed to achieve the tailored mechanical properties of hot stamping parts by adjusting temperature distribution of the heated blank. The results indicated that the tailored temperature distribution of the blank was realized and the temperature field of the blank could be divided into three regions: high temperature, transition and unheated region. The Vickers hardness of high temperature region varied from 470 HV10 to 500 HV10. While for transition region, it ranged from 160 HV10 to 470 HV10, and that of the unheated region was 160±5 HV10. It demonstrated that the blank with tailed properties was obtained.
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