Three-body-type Abrasive Wear Behavior of Multi-alloyed White Cast Iron with Different Carbon Contents Used for Hot Work Rolls

In this research, the three-body-type abrasive wear behavior of heat-treated multi-alloyed white cast irons, which has been used for work rolls in hot rolling stands, was investigated. Cast irons with varying C content from 1.73 to 2.34 mass% under 5 Cr, Mo, W, V each and 2 Co were prepared. After annealing, specimens hardened 1323 K 1373 austenitizing by fan air cooling. Hardened (As-H) tempered at three levels temperatures maximum hardness (THTmax), lower higher than that THTmax (L-THTmax H-THTmax, respectively). A rubber wheel tester evaluate resistance. It found relationship between loss (Wl) distance (Wd) expressed a linear function every test. heat treatment condition, rate (Rw, mg/m) value decreased as rose. As-H showed almost resistance specimens. state, lowest Rw mostly obtained The temperature provided value. best specimen 2.34%C both temperatures. lowered roughly proportion an increase hardness. However, values scattered broadly volume fraction retained austenite (V?) 10% then, gradually V? rose, irrespective temperature.