boron containing high strength low alloy martensite bainite wear-resistant steel

boron containing high strength low alloy martensite bainite wear-resistant steel
The chemical composition of boron containing high strength low alloy martensite bainite wear-resistant steel for (wt%):0.3-0.45C, 0.8-1.8Si, 1 ~ 1.8Mn, 0.8-1.8Cr, 0.1-0.5Mo / Cu, 0.001-0.003Ti / B, 0.02-0.06RE. was modified by RE-Si-Ca-Ti-B multiple composite modifier is added to 0.6%-0.8%, the heat treatment process is as follows: 880 c * 30min * 1H 250 DEG C quenching and low temperature tempering, quenching medium for oil or water quenching NJ liquid, microstructure of martensite, bainite is considerable; its performance can reach 1305-1780MPa; the hardness is 45-57HRC; AK is 76-150J / cm2 (unnotched). Batch production and testing that new high strength toughness of low alloy bainitic wear-resistant steel Ma reasonable chemical composition design, production technology is mature, stable product quality, safe and reliable use, can replace the traditional ZGMn13 in low stress abrasive Wear condition, wear resistance is 1.52 ~ 3.50 times of high manganese steel milling machine manufacturers.