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Study on the Development of 340MPa Grade Super Formable High Strength Steel Sheets  

Kim, Yong-Hee (School of Advanced Materials Engineering & RCAMD, Chonbuk National University)
Lee, Young-Soo (Technical Research Center, Hyundai HYSCO)
Lee, Oh-Yeon (School of Advanced Materials Engineering & RCAMD, Chonbuk National University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.17, no.4, 2009 , pp. 48-54 More about this Journal
Abstract
The demand for formable high-strength steel (HSS) sheets has recently increased to reduce the weight of automotive bodies. The 340MPa (Tensile Strength) grade steel sheets are widely used for body inner and outer panels. Especially, super formable 340MPa grade steel sheets with high r-value have an excellent deep drawability compared with the other 340MPa grade steel sheets. It is very available for a part such as rear floor, center floor and dash panels used conventional mild steels up to now. We developed a super formable HSS by optimization of chemical composition, texture control and heat treatment control. It has good mechanical properties with excellent formability (tensile strength: 343MPa, elongation: 41.1% and $\bar{r}=2.1$).
Keywords
Super formable HSS; Formability; Mechanical property; Texture; Heat treatment;
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