High-boron high-chromium low-carbon wear-resisting alloy steel with good red hardness and manufacturing method thereof

Abstract

The invention provides high-boron high-chromium low-carbon wear-resisting alloy steel with good red hardness and a manufacturing method thereof. The chemical content of the high-boron high-chromium low-carbon wear-resisting alloy steel includes, by weight, 0.10%-0.5% of C, 12%-26% of Cr, 0.5%-1.2% of Si, 0.5%-1.5% of Mn, 2.5%-3.6% of B, 0.7%-2.4% of Cu, 3.2%-3.9% of Al, 0.8%-1.6% of Ti, 0.02%-0.15% of Ca, 0.03-0.25% of Ce, 0.02%-0.18% of N, 0.05%-0.3% of Nb, 0.12%-0.25% of Mg, 0.04%-0.13% of K, 0.05%-0.12% of Ca, 0.06%-0.15% of Ba, less than 0.03% of S, less than 0.04% of P and the balance Fe and unavoidable impurity elements. After steel scrap and ferrochromium are melted in an electric furnace, a copper plate, silicon iron and ferromanganese are added to the electric furnace, after content is qualified through pre-furnace adjustment, the temperature of a melt rises to 1560-1620 DEG C, calcium-silicon alloy and deoxidation aluminum are added, ferrotitanium, ferroboron and metal aluminum are sequentially added and poured out of the furnace after being melted, granular rare earth magnesium alloy with the diameter of less than 12mm and a composite inoculant composed of metal cerium, Si3N4, VN, Nb and K are placed at the bottom of a steel ladle after being roasted, metaphoric inoculation processing is carried out on smelt liquid steel in a in-ladle pouring mode, the liquid steel pouring temperature ranges from 1400 DEG C to 1450 DEG C, and a casting piece undergoes air cooling for 2-4 hours at the temperature of 920-1150 DEG C.

Description

technical field [0001] The invention belongs to the technical field of iron and steel materials, and relates to a cast wear-resistant mold steel and a preparation method thereof, in particular to a high-boron, high-chromium, low-carbon wear-resistant alloy steel with good red hardness and a preparation method thereof. Background technique [0002] The development of modern science and technology has higher and higher requirements for materials. Wear and tear is common in mining, metallurgy, machinery, electric power, coal, petroleum, building materials, transportation and other industrial sectors and has become an important cause of equipment damage or material failure and energy consumption. , It is also one of the three main failure modes of mechanical parts. Research and development of a new generation of wear-resistant materials to reduce metal wear is of great significance to the national economy. At present, the metal wear-resistant materials widely used mainly include...

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Problems solved by technology

[0009] Therefore, although boron-containing high-chromium cast iron has been studied at home and abroad, it has not been widely promoted and applied because its strength, toughness and red hardness have not been resolved.

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