• CN：11-2187/TH
• ISSN：0577-6686

›› 2013, Vol. 49 ›› Issue (16): 77-83.

• 论文 •

### 硼钢B1500HS界面传热系数与压力关系的研究

1. 山东科技大学材料科学与工程学院;山东大学材料液固结构演变与加工教育部重点实验室
• 发布日期:2013-08-20

### Research on the Surface Heat Transfer Coefficient Depending on Surface Pressure of Boron Steel B1500HS

LI Huiping;HE Lianfang;ZHAO Guoqun

1. School of Materials Science and Engineering, Shandong University of Science and Technology Key Laboratory for Liquid-solid Structure Evolution & Processing of Materials of Ministry of Education, Shandong University
• Published:2013-08-20

Abstract: Surface heat transfer coefficient is one of the most important boundary parameters in the hot stamping of boron steel, the accuracy of this parameter has an obvious effect on the simulation result of temperature, phase transformation, stress/strain and so on. In order to research the boundary pressure, which is the main factor affecting surface heat transfer coefficient, a testing device is designed according to the characteristic of heat transfer between boron steel and die in the hot stamping. In the process of testing, CMT5000 tensile testing machine is used to put a pressure on the boron sample and testing device, a high speed data acquisition system is used to record the cooling curves of boron sample when the pressure is 0 MPa, 1 MPa, 10 MPa, 20 MPa and 40 MPa. The self-developed software of inverse heat conduction is used to analyze the temperature variation and evaluate the surface heat transfer coefficient between the boron sample and testing device. The effect of boundary pressure on the surface heat transfer coefficient is attained, and the research results show that, the surface temperatures of boron steel and testing device have little effect on the surface heat transfer coefficient. The oxidation of boron steel has a remarkable effect on the surface heat transfer coefficient. The surface heat transfer coefficient increases with the rise of boundary pressure, and the relationship is approximately linear.