Metastable austenite high-boron high-chrome low-carbon wear-resisting alloy steel and preparation method thereof

Abstract

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.

Description

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AI Technical Summary

Benefits of technology

This patented new type of superalloductor (SFAM) alkaline sulfate-coated steels), called SAFE2GARSiO4+γFe3B12 or Corsolv Iron Boron Nitride Complex Structure(CN). These compositions have excellent characteristics including strong magnetism, durability against damage from external stress environments like rainwater immersion, abrasion, rust crack initiation, strain relief, etc., making them suitable for practically applied industries where severe environmental stresses occur frequently. Additionally, these novel alloys exhibit superior flow ductility, reduced grain boundary roughness, increased tensile elongatinozircontrolling property, enhanced hydrostatic toracity, decreased chloromethane breakdown rate, lower melting point per second, less volatile decomposition residue, easier handling, longer service life time, better lubricant retardancy, and more stable design over long periods without losing their effectiveness when worn off.

Problems solved by technology

This patented technical problem addressed in this patents relates to developing an improved type of metal called stainless nitrogen-ceramics for applications where extreme environments require excellent performance against oxidative corrosive attacks without losing tensile fatigue life. Existing methods involve adding expensive rare earth elementaluminum (La), manganese silicate (MSi2), chrome steels containing vanadyl sulfur compounds (VSSC). These techniques aim towards enhancing mechanical property but they may lead to reduced durabilities and lifetimes overtime.

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