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Wear-resisting white cast iron and preparation method thereof

A technology of white cast iron and manufacturing method, which is applied in the field of wear-resistant materials, can solve the problems of increased production cost of cast iron, large amount of alloying elements added, low strength and toughness of cast iron, etc., achieves reduced production cost, low production cost, and improved mechanical properties and the effect of abrasion resistance

Inactive Publication Date: 2014-04-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned wear-resistant white cast iron generally has a large amount of alloying elements added, which leads to a substantial increase in the production cost of cast iron, and the carbides in the microstructure of cast iron are coarse and distributed in a network, resulting in low toughness and high brittleness of cast iron. lack of sex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Adopt 500 kilograms of medium-frequency induction electric furnaces to smelt the wear-resistant white cast iron of the present invention, and its manufacturing method is as follows: first use scrap steel, recarburizer, ferromanganese, ferrochrome and ferroboron as raw materials, smelt wear-resistant white cast iron molten iron in the electric furnace, The chemical composition and mass fraction of molten iron are controlled at 2.91%C, 4.53%Mn, 7.15%Cr, 0.68%B, 0.38%Si, 0.041%S, 0.044%P, and the balance is Fe. When the temperature of the molten iron reaches 1563°C, the molten iron is taken out of the furnace and poured into the ladle, and the compound modifier is added in advance in the ladle. The amount of the compound modifier accounts for 1.8% of the mass fraction of the molten iron in the ladle. After drying for 2 hours, the particle size is 4-8mm. The composite modifier consists of vanadium-nitrogen alloy with a mass fraction of 10% (the chemical composition and mass...

Embodiment 2

[0020] Adopt 500 kilograms of medium-frequency induction electric furnaces to smelt the wear-resistant white cast iron of the present invention, and its manufacturing method is as follows: first use scrap steel, recarburizer, ferromanganese, ferrochrome and ferroboron as raw materials, smelt wear-resistant white cast iron molten iron in the electric furnace, The chemical composition and mass fraction of molten iron are controlled at 3.28%C, 5.49%Mn, 6.01%Cr, 0.45%B, 0.33%Si, 0.040%S, 0.047%P, and the balance is Fe. When the temperature of the molten iron reaches 1579°C, the molten iron is taken out of the furnace and poured into the ladle, and the compound modifier is added in advance in the ladle. The amount of the compound modifier accounts for 3.0% of the mass fraction of the molten iron in the ladle. After drying for 3 hours, the particle size is 4-8mm. The composite modifier is composed of vanadium-nitrogen alloy with a mass fraction of 12% (the chemical composition and m...

Embodiment 3

[0022] Adopt 500 kilograms of medium-frequency induction electric furnaces to smelt the wear-resistant white cast iron of the present invention, and its manufacturing method is as follows: first use scrap steel, recarburizer, ferromanganese, ferrochrome and ferroboron as raw materials, smelt wear-resistant white cast iron molten iron in the electric furnace, The chemical composition and mass fraction of molten iron are controlled at 3.16%C, 4.97%Mn, 6.80%Cr, 0.63%B, 0.45%Si, 0.037%S, 0.042%P, and the balance is Fe. When the temperature of the molten iron reaches 1570°C, the molten iron is taken out of the furnace and put into the ladle, and the compound modifier is added in advance in the ladle. The amount of the compound modifier accounts for 2.5% of the mass fraction of the molten iron in the ladle. After drying for 3 hours, the particle size is 4-8mm. The composite modifier consists of vanadium-nitrogen alloy with a mass fraction of 11% (the chemical composition and mass fr...

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Abstract

The invention provides a wear-resisting white cast iron and a preparation method thereof, and belongs to the technical field of wear-resisting materials. The liquid wear-resisting white cast iron is smelted in an electric furnace at first, and the liquid iron is composed of 2.9-3.3% of C, 4.5-5.5% of Mn, 6.0-7.2% of Cr, 0.45-0.70% of B, 0.50% of Si<, 0.05% of S<, 0.05% of P< and the balance of Fe by mass fraction. Modification treatment is performed on the wear-resisting white cast iron by adding a compound modificator to a casting ladle, wherein the addition amount of the compound modificator accounts for 1.8-3.0% of the mass fraction of the liquid iron in the casting ladle; besides, the wear-resisting white cast iron has excellent properties after being quenched by air cooling at a temperature ranging from 950 to 1000 DEG C and tempered at a temperature ranging from 280 to 320 DEG C.

Description

technical field [0001] The invention relates to a white cast iron and a preparation method thereof, in particular to a wear-resistant white cast iron and a preparation method thereof, belonging to the technical field of wear-resistant materials. Background technique [0002] Because white cast iron contains a certain amount of high-hardness carbides, it has good wear resistance and has been widely used in industrial production. In order to improve the wear resistance of white cast iron, scientific and technological workers have done a lot of research on white cast iron alloying, heat treatment, and ceramic particle strengthening, and achieved certain results. Chinese invention patent CN102330016A discloses a preparation method of hypoeutectic high-chromium white cast iron. 1.7Mo, <0.04S, <0.06P, 0.05-0.4RE, Cu0.5-1.0, 0.05-0.15Zn, 0.1-0.3V, and the rest is Fe; it is characterized in that it includes the following steps: (1) preparing according to the right The mass f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/08C22C37/10
Inventor 符寒光蔡凯李卫雷永平郑开宏李耳符定梅张继光
Owner BEIJING UNIV OF TECH
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