The comparison of wear properties of different Fe‐based hardfacing alloys in four kinds of testing methods

Abstract

Iron-based hardfacing alloys are widely used to protect machinery equipment. A strong correlation is given between microstructure and chemical composition of welding deposit with the resulting wear behaviour. Concerning precipitation of metallurgical hard phases and synthetic added hard particles, the bonding strength of the hard phases in the metallic matrix seems to play a dominating role to obtain high wear resistance. The main objective of this study was to evaluate the wear behaviour for pure abrasion, combined impact/abrasion and high impact wear, respectively, for four different Fe-based hardfacing alloys. Tests were performed with a standard ASTM G65 dry-sand/rubber-wheel tester. An impeller-tumbler apparatus enabled investigation of impact abrasion wear tests. Additional wear tests with high impact loading were performed on a drop hammer apparatus. Fracture surface analysis was carried out after drop hammer testing and results were correlated with microstructure and interfacial bonding behaviour of precipitations in metallic matrix.

Wear Mechanisms at High Temperatures. Part 1: Wear Mechanisms of Different Fe-Based Alloys at Elevated Temperatures

“…Surprisingly, material D with the highest hard phase content does not perform better than material B at higher temperatures; the worse matrix backup at high temperatures leads to bigger breakouts, which increases the wear. Due to a finer microstructure and better matrix-carbide interfacial bonding, investigated earlier [13], material C does not suffer from this wear increase at higher temperatures that much. Both the ductile materials A and B form composite layers at high temperatures (Fig.…”

“…Mechanical and abrasive wear properties of the alloys depend on their microstructure and chemical composition [1][2][3][4][5][6][7][8][9][10][11][12]. To achieve impact resistance, a good ductility and good interfacial carbide-matrix bonding is necessary [13]. Therefore, for high-impact application, martensitic materials are best suited [14].…”

An Experimental Study on the Effect of Microstructure on Wear Behavior of Fe-Cr-C Hardfacing Alloys

“…Fe-Cr-C alloys are well known for their excellent performances under severe wear conditions [4], [5].…”

Effect of heat treatment on the microstructure, hardness and abrasive wear resistance of high chromium hardfacing

“…These hardfacing materials usually contain molybdenum, which can withstand high temperatures (Wang et al 2008). Other works (Arikan et al 2001;Bedolla-Jacuinde et al 2005;Badisch et al 2008) show possibility of titanium for the development of TiC in microstructure hardfacing. These studies showed that titanium carbide (TiC) formation into hardfacing increases abrasive resistance more than hardfacing containing NbC.…”

“…Some studies (Radulovic et al 1994;Badisch et al 2008) also highlight that increasing of volume fraction of eutectic carbides influenced toughness negatively. One of the ways for developing relatively toughness hardfacing is the use of fine grains of eutectic colonies.…”