Tribological and Thermal Behavior of Laser Implanted Tool Surfaces for Hot Stamping AlSi Coated 22MnB5 Sheets

Stephan Schirdewahn; Felix Spranger; Kai Hilgenberg; Marion Merklein

doi:10.4028/p-e4i60t

Paper Titles

Test of a New Water-Based Lubricant in Turning of 316L Stainless Steel
p.39

Surface Texturing in Cutting with Micro-Scale Structured Tools
p.45

Influence of Metal Working Fluids in Cutting Processes
p.51

Increasing and Decreasing Depth Taper Scratching: Force Response of Silicon
p.59

Tribological and Thermal Behavior of Laser Implanted Tool Surfaces for Hot Stamping AlSi Coated 22MnB5 Sheets
p.69

Characterization of an Environmentally Friendly Tribological System for Deep Drawing Using Volatile Media as Lubricant Substitute
p.75

An Investigation into the Influence of Interrupted Loading in Improving the Stretch-Flangeability of Dual Phase Steel
p.81

Optimization of the Surface Geometry in Structured Cold Rolling for Interlocking of Formed and Die-Cast Metal Components
p.89

Challenges in Tribometry for Warm and Hot Sheet Metal Forming of High Strength Aluminum with Tool Lubrication
p.95

HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 414Tribological and Thermal Behavior of Laser...

Tribological and Thermal Behavior of Laser Implanted Tool Surfaces for Hot Stamping AlSi Coated 22MnB5 Sheets

Abstract:

In the automotive industry, the development of electrically powered vehicles has become a major forward-looking topic. For improving the range and thus the efficiency of electric cars, lightweight construction has gained even more importance. In this regard, hot stamping has been established as a suitable and resource efficient process to manufacture high-strength and lightweight body-in-white components. This method combines hot forming and quenching of boron-manganese steel 22MnB5 in a single process step. As a result, complex structures with thin sheet thicknesses and high ultimate tensile strength up to 1500 MPa are generated. However, the use of lubricants is not possible at elevated temperatures, which subsequently leads to high thermo-mechanical tool stresses. As a side effect, high friction and severe wear occur during the forming process, which affect the resulting part quality and maximum tool life. Therefore, the aim of this study is to improve the tribological performance of hot stamping tools by using a laser implantation process. This technique is based on manufacturing highly wear resistant, separated and elevated structures in micrometer range by embedding hard ceramic particles into the tool material via pulsed laser radiation. As a result, highly stressed areas on the tool surface can be modified locally, which in turn influence the tribological and thermal behavior during the forming process. In this regard, laser implanted and conventionally tool surfaces were investigated under hot stamping conditions. A modified pin-on-disk test was used to analyze the friction coefficient and occuring wear mechanisms. Furthermore, quenching tests as well as hardness measurements were carried out to gain in-depth knowledge about the cooling behavior of the modified tool surfaces and its impact to the resulting mechanical part properties.

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Periodical:

Defect and Diffusion Forum (Volume 414)

Pages:

69-74

DOI:

https://doi.org/10.4028/p-e4i60t

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Online since:

February 2022

Authors:

Stephan Schirdewahn*, Felix Spranger, Kai Hilgenberg, Marion Merklein

Keywords:

Hot Stamping, Laser Implantation, Surface Structuring, Tribology

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* - Corresponding Author

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