The paper deals with classification of steel sheets on the base of strength and structural characteristics in automative industry. Experimental works were aimed to obtain the best strengthening parameters as work hardening and solid solution ferrite hardening are from interstitial carbon atoms during paint-baking of auto body. Hardening process from interstitial atoms is realized as two-step process. First step is BH (bake hardening) effect made by interaction of interstitial atoms with dislocations. The Cottrels atmosphere is obtained. Second step of BH effect is produced by precipitation hardening from microalloyed elements. WH (work hardening) effect is obtained by plastic deformations during sheet deep drawing. Experimental works referred to the achievement such plastic material properties after cold rolling, annealing and skin-pass rolling, which classify the material ZStE 220 BH after this treatment to drawing categories on the level DQ - DDQ. The optimal treatment conditions, which are result of experimental works, for maximization of sum (WH+BH) effects are the following: summary cold rolling deformation Gold = 65 %, annealing temperature Tmal = 700 degree C at the maximum sum (WH+BH) = 86 MPa.
Influence of plastic deformation and annealing conditions on BH effect development
Verformungskundliches Kolloquium, 22 ; 106-114
2003
9 Seiten, 10 Bilder, 12 Quellen
Conference paper
English
Development of bake hardening effect by plastic deformation and annealing conditions
Tema Archive | 2006
|Influence of plastic deformation on line pipe material
Tema Archive | 2004
|Joining by plastic deformation
Tema Archive | 2013
|The influence of processing conditions on plastic material odor
Tema Archive | 2008
|The Plastic Deformation of Polycrystals
NTIS | 1971
|