Abstract: A method for manufacturing thin-specification high-Ti wear-resistant steel NM450 comprises the steps of preparing melted iron in a blast-furnace, preprocessing the melted iron, smelting the melted iron in a converter, refining the melted steel in a LF furnace, refining the melted steel in a RH furnace, conventional slab continuous casting, heating the slab in a heating furnace, dephosphorizing the slab by high-pressure water, heating the slab in a hot continuous rolling mill, performing ultra fast cooling, reeling, flattening, heating, quenching, tempering and finishing.

Abstract: A thin gauge wear-resistant steel sheet, including the following chemical elements expressed in percentage by weight: 0.15-0.20 wt. % of carbon; 1.2-1.8 wt. % of manganese; 0.1-0.40 wt. % of copper; 0.15-0.30 wt. % of molybdenum; 0.20-0.40 wt. % of chromium; 0.03-0.06 wt. % of niobium; 0.01-0.03 wt. % of titanium; 0.0006-0.0015 wt. % boron; less than 0.015 wt. % of phosphorus; less than 0.010 wt. % of sulphur; and the balance being ferrum and unavoidable impurities, wherein the thickness of the steel sheet is in a range of 3.0 to 8 mm.

Abstract: A method for manufacturing thin-specification high-Ti wear-resistant steel NM450 comprises the steps of preparing melted iron in a blast-furnace, preprocessing the melted iron, smelting the melted iron in a converter, refining the melted steel in a LF furnace, refining the melted steel in a RH furnace, conventional slab continuous casting, heating the slab in a heating furnace, dephosphorizing the slab by high-pressure water, heating the slab in a hot continuous rolling mill, performing ultra fast cooling, reeling, flattening, heating, quenching, tempering and finishing.

Abstract: A thin gauge wear-resistant steel sheet, including the following chemical elements expressed in percentage by weight: 0.15-0.20 wt. % of carbon; 1.2-1.8 wt. % of manganese; 0.1-0.40 wt. % of copper; 0.15-0.30 wt. % of molybdenum; 0.20-0.40 wt. % of chromium; 0.03-0.06 wt. % of niobium; 0.01-0.03 wt. % of titanium; 0.0006-0.0015 wt. % boron; less than 0.015 wt. % of phosphorus; less than 0.010 wt. % of sulphur; and the balance being ferrum and unavoidable impurities, wherein the thickness of the steel sheet is in a range of 3.0 to 8 mm.

Abstract: A weathering steel consisting essentially of C in the range of from 0.03 to 0.07 percent by weight; Si in the range of from 0.15 to 0.29 percent by weight; Mn in the range of from 1.21 to 1.5 percent by weight; P in the range of from 0.006 to 0.04 percent by weight; S in the range of from 0.001 to 0.01 percent by weight; Cu in the range of from 0.2 to 0.5 percent by weight; Cr in the range of from 0.3 to 0.7 percent by weight; Ni in the range of from 0.15 to 0.35 percent by weight; Ti in the range of from 0.08 to 0.14 percent by weight; and the balance is essentially iron; and methods for producing the same.

Abstract: Taught is a method for producing 700 MPa high strength weathering steel, comprising employing a thin slab casting and rolling technology, comprising (a) smelting at a charging temperature to produce molten steel, (b) refining said molten steel at a tapping temperature, (c) thin slab continuous casting of a casting billet, (d) soaking of said casting billet, (e) hot continuous rolling of said casting billet at a finishing temperature, (f) laminar cooling of said casting billet, and (g) coiling of said casting billet at a coiling temperature, wherein C is present in the molten steel in the range of from 0.03 to 0.07 percent by weight; Si is present in the molten steel in the range of from 0.3 to 0.5 percent by weight; Mn is present in the molten steel in the range of from 0.6 to 1.6 percent by weight; P is present in the molten steel in the range of less or equal to 0.04 percent by weight; S is present in the molten steel in the range of less or equal to 0.