The invention discloses a TiC particle enhancement mode complex phase tissue high-
ductility wear-resisting steel plate and a manufacturing method thereof, belonging to the technical field of
alloy steel. The steel plate is prepared from the following chemical components in percentage by weight: 0.20-0.40% of C, 1.00-2.50% of Mn, 0.80-1.50% of Si, 0.20-0.60% of Ni, 0.15-0.50% of Mo, 0.40-0.80% of Ti, 0.0005-0.003% of B, less than or equal to 0.005% of S, less than or equal to 0.015% of P, and the balance of Fe and inevitable
impurity elements. One or two of
alloy elements, namely, 0.00-0.50wt% of Cu and 0.00-0.80wt% of Cr, are further added. The manufacturing method comprises the following steps:
smelting by using a converter or an electric furnace, performing external refining, performing
continuous casting or
die casting on a slab, heating, rolling, cooling and performing
thermal treatment. Complex phase tissue of granular
bainite,
lath martensite and TiC particles is obtained from rolling, the granular
bainite comprises
bainite ferrite /
martensite austenite islands, the
volume fraction of the residual
austenite is about 6-12%, the
volume fraction of TiC precipitated phase is about 0.5-1.5%, the average particle size is about 1mu m, the
hardness of the steel plate is HB370-420, the wearing resistance is superior to or equal to Hardox450, the
processing property and the
welding property are excellent, and manufacturing requirements of relevant equipment are met.