Effect of vanadium on microstructure and wear behaviour of Fe based C–B–Ni hardfacing alloy

Abstract

To investigate the influence of chemical compositions of different hardfacing alloys on wear performance experimental high vanadium Fe-C-B-Ni alloys in the form of blended powders have been cast in a laboratory furnace and analysed in three configurations: hypereutectic, neareutectic and hypoeutectic. The solidification behaviour was defined by differential scanning calorimetry while the main microstructural features were characterised by microscopy, X-ray diffraction and microhardness as well as pin-on-disc wear tests. Fe-V rich powders to an originally hypereutectic Fe-C-B-Ni alloy induced the shift to hypoeutectic solidification and promoted the presence of larger quantities of hard V-rich carbides. The new V-bearing alloys showed higher wear performance and higher bulk hardness than the reference alloys. The improved wear properties were mainly due to the precipitation of fine globular V-rich carbides that effectively reinforced the structure without any evidence of pullout and cracking of the smaller particles.

The effect of microstructure on abrasive wear of a Fe–Cr–C–Nb hardfacing alloy deposited by the open arc welding process

“…Among the varieties of hardfacing alloys commercially available, white cast irons with a high concentration of chromium and carbon still have proved particularly popular due to the large volume fractions of hard M 7 C 3 carbides that can be formed once these types of microstructures have good wear resistance properties [2][3][4][5][6].…”

A comprehensive review on recent developments in materials and technological parameters for plasma transferred arc hardfacing process

“…Many literatures have focused on the selection of appropriate material for the improvement of wear and other surface properties in the field of welding-assisted hardfacing technologies. 1,3,5,12,27,42,48,[52][53][54][55][56][57][58][59]60 Hardfacing materials can be grouped mainly into three major groups namely iron-based alloys, nickel-based alloy, and cobalt-based alloys.…”

“…Many literatures have focused on the selection of appropriate material for the improvement of wear and other surface properties in the field of welding-assisted hardfacing technologies. 1,3,5,12,27,42,48,52–54,55–59,60…”

“…These carbides have high hardness values and uncommonly high toughness compared with other carbides. 54 By adding tungsten, the wear loss was comparatively less with the tungsten as the matrix, owing to the higher hardness and reinforced microstructure. 56 The coating with the higher boron of 3% has higher borides of 32% which leads to the increased hardness and wear resistance of the coating.…”