ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
New type of IF cold-rolled high strength steels (HSSs) with the strength level of 390 and440MPa have been developed under the chemistry of the extra-low carbon steel containing around60ppm C with an intentional addition of niobium by hybridizing the precipitation hardening withniobium carbides and the supplemental solid-solution hardening. In this steel, Precipitation FreeZone (PFZ) nearby recrystallized grain boundaries forms during continuous annealing. This structureleads to unique mechanical properties such as lower yielding and superior anti-secondary-workembrittlement under fine grain structure strictly required for the exposed panels in Body-in-White.Principles of the unique mechanical properties of the steel are introduced related with the formation ofPFZ during annealing, and the results of further approach to improve them as the state-of-the-artproduct, which is widely used for the exposed panels in Body in White, are introduced in the paper
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.4369.pdf
Permalink