Wear Resistance of Sintered Composite Hardfacings under Different Abrasive Wear Conditions

  • Taavi SIMSON Tallinn University of Technology
  • Priit KULU Tallinn University of Technology
  • Andrei SURŽENKOV Tallinn University of Technology
  • Riho TARBE Tallinn University of Technology
  • Dmitri GOLJANDIN Tallinn University of Technology
  • Marek TARRASTE Tallinn University of Technology
  • Mart VILJUS Tallinn University of Technology
  • Rainer TRAKSMAA Tallinn University of Technology
Keywords: hardfacing, powder metallurgy, abrasive wear, impact erosion

Abstract

The article focuses on vacuum liquid phase sintered (PM) composite hardfacings and their behaviour under different abrasive wear conditions. Hardfacings studied contained 3050 vol % fine, coarse or multimodal (fine and coarse) hardmetal reinforcement. For wear resistance studies, we used the Abrasive Rubber Wheel Wear (ARWW) test as a three-body abrasive wear test, the Abrasive Wheel Wear (AWW) test as a two-body abrasive wear test and the Abrasive-Impact Erosion wear (AIEW) test as an abrasive-erosive wear test. Tested materials were compared to Hardox 400 steel and CDP112 wear plate (Castolin Eutectic® Ltd.). It was found that under three-body abrasion conditions (ARWW test) hardfacings with high content of spehrical coarse reinforcement are suitable; their wear resistance is about two times higher than that of unreinforced hardfacings. Under two-body abrasive wear (AWW test), hardfacings with a high content of coarse reinforcement are recommended; their wear resistance is up to eight times higher than that of unreinforced hardfacings from the figures and graphs mentioned in the text. Under abrasive-erosive wear (AIEW test), unreinforced ductile materials are recommended; they have two to three times higher wear resistance than composite hardfacings reinforced with fine or multimodal reinforcement.

DOI: http://dx.doi.org/10.5755/j01.ms.23.3.16323

Published
2017-06-27
Section
METALS, ALLOYS, COATINGS