TY - GEN
T1 - Alloy design, processing and properties of TRIP steels
T2 - International Conference on Advanced High Strength Sheet Steels for Automotive Applications
AU - Traint, S.
AU - Pichler, A.
AU - Blaimschein, M.
AU - Röthler, B.
AU - Krempaszky, C.
AU - Werner, E.
PY - 2004
Y1 - 2004
N2 - Advanced high strength thin sheet steel grades have gained a considerable marked share. As a rule, increasing strength levels generally result in decreasing formability. However, low alloyed TRIP steel grades show a considerable better balance between strength and formability and, therefore, they are of particular interest for the automotive industry. In this work an overview of the currently proposed alloy designs in combination with processing parameters and resulting mechanical properties is given and the results are critically discussed. Based on a summary of the most important steps during processing of thin sheet TRIP steels and of thermodynamic calculations, the impact of Si, Al, P, Cu, C and Nb on the phase transformations during annealing and the resulting mechanical properties is presented for laboratory processed material. Generally, concepts based on Al or on a partial substitution of Si or Al with P were successful. In contrast, investigated alloy designs based on Cu were not promising. An Al based alloy design with Si additions was selected for industrial processing. The impact of the line configurations - in particular hot dip galvanizing (HDG) lines and continuous annealing (CA) lines - were critically analyzed. In a final step results from TRIP grades industrially produced via CA or HDG with minimum tensile strength levels of 600, 700 and 800 MPa are presented and discussed.
AB - Advanced high strength thin sheet steel grades have gained a considerable marked share. As a rule, increasing strength levels generally result in decreasing formability. However, low alloyed TRIP steel grades show a considerable better balance between strength and formability and, therefore, they are of particular interest for the automotive industry. In this work an overview of the currently proposed alloy designs in combination with processing parameters and resulting mechanical properties is given and the results are critically discussed. Based on a summary of the most important steps during processing of thin sheet TRIP steels and of thermodynamic calculations, the impact of Si, Al, P, Cu, C and Nb on the phase transformations during annealing and the resulting mechanical properties is presented for laboratory processed material. Generally, concepts based on Al or on a partial substitution of Si or Al with P were successful. In contrast, investigated alloy designs based on Cu were not promising. An Al based alloy design with Si additions was selected for industrial processing. The impact of the line configurations - in particular hot dip galvanizing (HDG) lines and continuous annealing (CA) lines - were critically analyzed. In a final step results from TRIP grades industrially produced via CA or HDG with minimum tensile strength levels of 600, 700 and 800 MPa are presented and discussed.
KW - Alloy design (Si, Al, P, Cu)
KW - Continuous annealing
KW - Hot dip galvanizing
KW - Mechanical properties
KW - TRIP steel grades
KW - Transformation during processing
UR - https://www.scopus.com/pages/publications/33644701412
M3 - Conference contribution
AN - SCOPUS:33644701412
SN - 1886362726
T3 - International Conference on Advanced High Strength Sheet Steels for Automotive Applications - Proceedings
SP - 79
EP - 98
BT - International Conference on Advanced High Strength Sheet Steels for Automotive Applications - Proceedings
A2 - Baker, M.A.
Y2 - 6 June 2004 through 9 June 2004
ER -