Thermomechanical Wear Testing of Metal Matrix Composite Cladding for Potential Application in Hot Rolling Mills

Author:

Domitner Josef1ORCID,Aigner Michael2,Stern Thomas1,Paar Armin2,Sommitsch Christof1,Elizondo Leonel2

Affiliation:

1. Institute of Materials Science, Joining and Forming Research Group of Tools & Forming Graz University of Technology (TUG) Inffeldgasse 11/I 8010 Graz Austria

2. Eisenwerk Sulzau-Werfen, R. & E. Weinberger AG (ESW) Bundesstraße 4 5451 Tenneck Austria

Abstract

Laser metal deposition (LMD) is utilized to clad the surface of a miniaturized test roll (Ø 40 mm) of tool steel. The cladding consists of two layers: a nickel alloy as intermediate layer deposited onto the surface of the steel substrate, and a metal matrix composite (MMC) as top layer consisting of spherical tungsten carbide particles embedded into the nickel alloy matrix. The thermomechanical wear behavior of the cladding is investigated on a test rig, where the test roll is pressed against an inductively heated load roll. Multiple test runs up to several hours simulating industrial loading conditions are performed. The presented testing procedure enables predicting the time‐dependent abrasive wear behavior of the cladding, in particular for hot rolling mill applications. After testing for 8 h at temperature of 650 °C and at contact pressure of approximately 1 GPa, the maximum depth of the wear mark is about 0.12 mm. Partial cracking, debonding and dissolution of the tungsten carbide particles, as well as formation of iron and chromium oxides at the surface of the wear marks occur. However, as low abrasive wear is observed, the investigated MMC may potentially be applicable for cladding rolls in steel hot rolling mills.

Publisher

Wiley

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