Die Material Selection Criteria for Aluminum Hot Stamping

Abstract

The aim of this work is to develop a die material selection criterion for aluminum hot stamping applications. The criterion has been based on the back-to-back comparison of a set of reciprocating friction and wear tests. Three representatives belonging to different stamping die material families have been selected for the study: a cold work steel, a hot work steel, and a cast iron. These tool materials have been combined with an exemplary member from two heat treatable aluminum families: 2XXX and 6XXX. Each die-material/aluminum–alloy combination has been tested at three temperatures: 40, 200, and 450 °C. The temperatures have been selected according to different stamping scenarios: long takt time press quenching, short takt time press quenching, and very short takt time hot forming without quenching, respectively. The results show that, among the three die material options available, the cold work steel turned out to be the most favorable option for high volume production and long takt time, the hot work steel fitted best for high volume production coupled with short takt time, and cast iron turned to outstand for short runs with prototype dies and for hot stamping without die quenching.

Fracture Behavior of the Hot-Stamped PHS2000 Steel Based on GISSMO Failure Model

“…Its tensile strength can reach 1200~2000 MPa. Compared with other lightweight materials such as aluminum alloys, hot-stamped steel materials have the advantages of controllable manufacture-use-maintenance cost, good processability, and good lightweight potential, and thereby the proportion of applications is increasing in the automobile field [12][13][14][15][16][17][18][19]. The application of hot-stamped steels as a structural part of the body in white (BIW) can reduce the weight and ensure safety performance.…”

Influence of Operating Temperature on the Service Life of Aluminum Extrusion Dies

“…It has been shown that the matrix material has a significant impact on the extrusion process. Muro et al [ 10 ] showed the influence of the matrix material in the hot stamping process on the process of its wear. Terčelj and Kugler [ 11 ] pointed out that optimizing geometry and technological parameters allows the life of matrices to be extended.…”