High-toughness high-boron medium-chrome low-carbon wear-resisting alloy steel and preparation method thereof

A tough, high-boron, alloy steel technology, applied in high-strength, high-boron, medium-chromium, low-carbon wear-resistant alloy steel and its preparation, casting wear-resistant mold steel and its preparation, to achieve low production cost, high impact and wear resistance , Mitigate the effects of dust production and development

Inactive Publication Date: 2014-01-29
丁家伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, under impact wear conditions, the wear resistance of martensitic matrix materials is not as good as that of austenitic matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Melt scrap steel and ferrochrome in an electric furnace, add copper plate, ferrosilicon and ferromanganese after the molten steel is melted, control the carbon content to meet the requirements, adjust the composition before the furnace to pass, raise the temperature of the melt to 1560~1600℃ , adding silicon-calcium alloy for pre-deoxidation, adding aluminum for final deoxidation, and then sequentially adding ferro-titanium and ferro-boron to melt;

[0040] (2) After all ferro-titanium and ferro-boron are melted, the granular rare earth magnesium alloy less than 12mm and metal cerium and Si 3 N 4 The composite metamorphic inoculant composed of , Nb and K is wrapped with a thin iron sheet, baked at a temperature of 160-200°C, and placed on the bottom of the ladle, and the smelted molten steel is subjected to metamorphic inoculation treatment by the method of pouring into the ladle;

[0041] (3) The molten steel that has undergone metamorphic inoculation treatment in...

Embodiment 2

[0046] (1) Melt scrap steel and ferrochrome in an electric furnace, add copper plate, ferrosilicon and ferromanganese after the molten steel is melted, control the carbon content to meet the requirements, adjust the composition before the furnace to pass, raise the temperature of the melt to 1560~1600℃ , adding silicon-calcium alloy for pre-deoxidation, adding aluminum for final deoxidation, and then sequentially adding ferro-titanium and ferro-boron to melt;

[0047] (2) After all ferro-titanium and ferro-boron are melted, the granular rare earth magnesium alloy less than 12mm and metal cerium and Si 3 N 4 The composite metamorphic inoculant composed of , Nb and K is wrapped with a thin iron sheet, baked at a temperature of 160-200°C, and placed on the bottom of the ladle, and the smelted molten steel is subjected to metamorphic inoculation treatment by the method of pouring into the ladle;

[0048] (3) The molten steel that has undergone metamorphic inoculation treatment in...

Embodiment 3

[0054] (1) Melt scrap steel and ferrochrome in an electric furnace, add copper plate, ferrosilicon and ferromanganese after the molten steel is melted, control the carbon content to meet the requirements, adjust the composition before the furnace to pass, raise the temperature of the melt to 1560~1600℃ , adding silicon-calcium alloy for pre-deoxidation, adding aluminum for final deoxidation, and then sequentially adding ferro-titanium and ferro-boron to melt;

[0055] (2) After all ferro-titanium and ferro-boron are melted, the granular rare earth magnesium alloy less than 12mm and metal cerium and Si 3 N 4 The composite metamorphic inoculant composed of , Nb and K is wrapped with a thin iron sheet, baked at a temperature of 160-200°C, and placed on the bottom of the ladle, and the smelted molten steel is subjected to metamorphic inoculation treatment by the method of pouring into the ladle;

[0056] (3) The molten steel that has undergone metamorphic inoculation treatment in...

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Abstract

The invention relates to a high-toughness high-boron medium-chrome low-carbon wear-resisting alloy steel and a preparation method thereof. The high-toughness high-boron medium-chrome low-carbon wear-resisting alloy steel comprises the following chemical components by weight percentage: 0.20-0.5% of C, 5-12% of Cr, 0.5-1.2% of Si, 3.5-5.5% of Mn, 0.3-2.8% of B, 0.3-2.1% of Cu, 0.2-0.5% 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 inevitable impurity elements. The preparation method comprises the following steps of: adding a copper plate, silicon iron and ferromanganese iron after steel scrap and chromium iron are melted; after the component adjustment before furnace is qualified, increasing the temperature of the melt to 1560-1620 DEG C, adding a calcium-silicon alloy and aluminum for deoxidation, and orderly adding ferrotitanium and ferroboron, melting, and then discharging; putting a composite inoculant composed of granular rare-earth magnesium alloy with granule size being less than 12mm, metal cerium, Si3N4, VN, Nb and K at the bottom of a steel ladle after baking, and performing inoculation treatment on the molten steel by a rush-into-ladle method, wherein the casting temperature of the molten steel ranges from 1400 DEG C to 1450 DEG C; preserving the heat of castings for 4-6 hours at 700-780 DEG C, and then carrying out subcritical air quenching to obtain the alloy steel.

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-strength, high-toughness, high-boron, medium-chromium, low-carbon wear-resistant alloy steel 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. , 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38
Inventor 丁家伟丁刚郭长庆符寒光张莹谢宗翰强颖怀印杰
Owner 丁家伟
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