676 results about "Silicon iron" patented technology

The invention discloses metastable austenite high-boron high-chrome low-carbon wear-resisting alloy steel and a preparation method thereof. The metastable austenite high-boron high-chrome low-carbon wear-resisting alloy steel comprises the following chemical components in percentage by weight: 0.20-0.5% of C, 12-26 % of Cr, 0.5-1.2% of Si, 3.5-5.5% of Mn, 0.3-3.2% of B, 0.3-2.4% of Cu, 0.2-0.6% of Ti, 0.05-0.25% of Ca, 0.03-0.3% of Ce, 0.02-0.18% of N, 0.05-0.3% of Nb, 0.04-0.09% of Al, 0.1-0.5% of SiMgRe, 0.04-0.13% of K, less than 0.03% of S, less than 0.04% of P, and the balance of Fe and unavoidable impurity elements. The preparation method comprises the following steps: adding copper plate, silicon iron and ferromanganese into melted steel scrap and ferrochromium, after regulating the components in furnace to be qualified, warming the melt to 1560-1620 DEG C, adding calcium silicon and aluminum for deoxidizing, and sequentially adding ferrotitanium and ferroboron and then discharging after melting; putting baked composite modification inoculant consisting of rare earth magnesium alloy particles of which the particle size is less than 12 mm, metal cerium, Si3N4, VN, Nb and K to the bottom of a steel ladle, and performing modification inoculation to smelted liquid steel by pouring in the ladle, wherein the pouring temperature of the liquid steel is 1400-1450 DEG C; and preserving casting at the temperature of 700-780 DEG C for 4-6 hours for subcritically quenching by air, and thus obtaining the alloy steel provided by the invention.