Affiliation:
1. Shanghai Huizhong Automotive Manufacturing Co.,Ltd
2. Shanghai University
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.
Publisher
Trans Tech Publications, Ltd.
Reference11 articles.
1. D. Lorenz, K. Roll, Simulation of hot stamping and quenching of boron alloyed steel, in: Presented at Seventh Int. ESAFORM Conf. on Mat. Forming, Trondheim, Norway, (2004).
2. M. Geiger, M. Merklein, C. Hoff, Basic investigation on the hot stamping steel 22MnB5, in: Proceedings of the Sheet Metal 2005 Conf., 2005, p.795–802.
3. M. Suehiro, K. Kusumi, T. Miyakoshi, J. Maki, M. Ohogami, Properties of aluminium-coated steels for hot-forming, Nippon Steel Technical Report No. 88, July (2003).
4. Kleiner, M., Geiger, M., Klaus, A, 2003, Manufacturing of Lightweight Components by Metal Forming, Annals of the CIRP, 52/2: 521-542.
5. Geiger M, Merklein M, Hoff C. Basic investigations on the hot stamping steel 22MnB5[J]. Advanced Materials Research, 2005, 6: 795-804.