Wear Resistance of Sintered Composite Hardfacings under Different Abrasive Wear Conditions

Abstract

The article focuses on vacuum liquid phase sintered (PM) composite hardfacings and their behaviour under different abrasive wear conditions. Hardfacings studied contained 30 -50 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 threebody 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.

Abrasive Slurry Erosion Behavior of Nitrile-Butadiene Rubber with Different Acrylonitrile Contents

“…As the carrier of erodent particles, the liquid medium could infiltrate into the rubber during erosion process, causing the dynamic swelling of rubber, which will make the rubber aged and further affected the tribological properties [24,25]. The investigations of Lv et al [16,19] showed that after swelling, the wear performance of NBR reduced, the hardness decreased, and the surface damage became more serious. Ch'ng [25] reported that the amount of swelling of rubber in solvent is affected by loading.…”

Prediction of Abrasive Erosion Impact Wear of Composite Hardfacings

“…where 𝛼𝛼′ 𝜀𝜀 𝑐𝑐 2 is a dimensionless ratio, taken from [10]; ρ 1 is the density of the target material [mg/mm 3 ]; H dynamic is the dynamic hardness of the target material [N/mm 2 ]; HV1 was used for calculations [11].…”