Abrasive Wear in Punching Pin with Cryogenic Treatment for GPa-Grade Steels
- 46 Downloads
The increasing application of GPa-grade steel to autobody panels has led to increasing problems related to abrasive wear in mold and tool surfaces, which dramatically degrades tool life and also degrades the surface finish of the final product. This paper mainly concerns the punching wear resistance imparted by cryogenic (CR) and quenching and tempering (QT) treatments, as well as the additional use of a TiN coating layer. This is investigated using pin-on-disk tests and punching experiments against DP980 sheets for up to 90,000 cycles. The wear coefficient of CR is about 10% greater than that of QT, which leads to a decelerated punching pin wear rate relative to QT starting at around the 70,000th cycle. To numerically predict abrasive wear, we newly propose that the wear coefficients of the substrate should be updated as a function of the clearance stage to improve the accuracy and efficiency of the wear analysis.
KeywordsCryogenic treatment Abrasive wear GPa-grade steel DP980 Archard model Punching pin
Unable to display preview. Download preview PDF.
- 1.Baluch, N., Udin, Z. M., and Abdullah, C. S., “Advanced High Strength Steel in Auto Industry: An Overview,” Engineering, Technology & Applied Science Research, Vol. 4, No. 4, pp. 686–689, 2014.Google Scholar
- 3.Till, E., Berger, E., and Larour, P., “On an Exceptional Forming Behaviour Aspect of AHSS Sheets,” Proc. of IDDRG 2008 International Conference, 2008.Google Scholar
- 4.Sadagopan, S., “Formability Characterization of Advanced High-Strength Steels,” Great Designs in Steel Seminar, 2004.Google Scholar
- 8.Viale, D. and Bhatnagar, R., “Optimization of Stamping Tools to Process Very High Strength Steels; Comparison of Cold Work Tool Steels,” Autosteel, https://www.autosteel.org/-/media/files/autosteel/great-designs-in-steel/gdis-2011/13—guy-baron—optimization-ofstamping-tools-to-process-very-high-strength-steels.ashx (Accessed 11 JUN 2018)
- 15.Ipharmachine, “Dies Problem and Solution,” http://www.ipharmachine.com/FAQ/Press-Pill-Dies/Dies-Problem-and-Solution., 2015. (Accessed 24 APR 2017)
- 18.Gruber, M., Ressel, G., Ploberger, S., Marsoner, S., and Ebner, R., “Characterization of the Effect of Cryogenic Treatment on the Tempering Behavior of a Secondary Hardening High Co-Ni Steel,” Proc. of IOP Conference Series: Materials Science and Engineering, Vol. 119, Paper No. 012018, 2016.Google Scholar
- 27.Krause, B. and Bell, T., “Increasing the Efficiency of Metal forming Tooling for Advanced High-Strength Steels,” Autosteel, https://www.autosteel.org/-/media/files/autosteel/great-designs-in-steel/gdis-2005/11—increasing-the-efficiency-of-metalforming-tooling-foradvanced-high-strength-steels.ashx (Accessed 11 JUN 2018)Google Scholar
- 29.ASTM G99, “Standard Test Method for Wear Testing with a Pin-on-Disk Apparatus,” 2017.Google Scholar