Investigation on Properties and Microstructure in Hot Stamping Operation of Rear Axle Beams

Abstract:

In the automotive industry, the hot forming of high strength steels offers the possibility to obtain significant reduction of weight without affecting the structural performances of final products. The main reason of its restricted application in the industry lies however in the lack of basic knowledge about mechanical and microstructural characteristics of sheets at elevated temperature, boundary conditions, and other process parameters. To partially overcome this limitation, this paper presents a research on the material properties of the hot stamping steel 22MnB5. Sheets of boron steel 22MnB5 with a thickness of 3.8mm were investigated and the results of experimental hot stamping tests were considered. The yield strength (YS) reached about 1200MPa, tensile strength (TS) reached 1500MPa, microhardness reached over 450HV at heating temperature of 880°C and holding 5 min.

• Periodical: Advanced Materials Research (Volume 1063)
• Pages: 143-147
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1063.143
• Online since: December 2014
• Authors: Xiao Chun Jin, Yong Shen Xue, Qing Nan Ma, Mei Zhang*, Lin Li
• Keywords: 22MnB5, High Strength Steel (HSS), Hot Stamping, Rear Axle Beam, Sheet Metal Formability

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