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A kind of hypereutectic wear-resistant high chromium cast iron and preparation method thereof

A high-chromium cast iron and hypereutectic technology, which is applied in the field of wear-resistant materials, can solve the problems of coarse carbides, complicated preparation processes, and brittle materials, and achieve the effects of simple production process, low energy consumption and high production efficiency.

Inactive Publication Date: 2016-08-24
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned hypereutectic high-chromium cast iron either has the disadvantages of complex preparation process or large brittleness of the material due to coarse carbides

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of hypereutectic wear-resistant high chromium cast iron and its preparation method, using 500 kilograms of intermediate frequency induction furnace melting, the specific preparation process steps are:

[0018] ①Smelt scrap steel, recarburizer, ferrochrome, ferro-niobium, ferro-vanadium, ferrosilicon, ferro-manganese, ferro-boron, metal aluminum and other furnace materials in a 500 kg medium-frequency induction furnace to obtain hypereutectic high-chromium cast iron molten iron. The chemical composition and mass fraction of eutectic high chromium cast iron molten iron are controlled at 4.82%C, 28.17%Cr, 2.06%Nb, 3.99%V, 0.56%Si, 0.79%Mn, 0.80%B, 0.63%Al, 0.033%S , 0.045% P, and the balance Fe, when the temperature of the molten iron reaches 1589°C, it is released into the ladle. During the process of the molten iron being released from the furnace, ferrovanadium particles with a particle size of 8-15 mm are added along with the molten iron flow (the chemical compos...

Embodiment 2

[0021] A kind of hypereutectic wear-resistant high chromium cast iron and its preparation method, which adopts 1000 kg medium frequency induction furnace for smelting, and the specific preparation process steps are:

[0022] ①Smelt scrap steel, recarburizer, ferrochrome, ferro-niobium, ferro-vanadium, ferrosilicon, ferro-manganese, ferro-boron, metal aluminum and other furnace materials in a 1000 kg intermediate frequency induction furnace to obtain hypereutectic high-chromium cast iron molten iron. The chemical composition and mass fraction of eutectic high chromium cast iron molten iron are controlled at 4.97%C, 29.91%Cr, 2.47%Nb, 3.50%V, 0.89%Si, 0.54%Mn, 0.66%B, 0.75%Al, 0.036%S , 0.040% P, the balance Fe, when the temperature of the molten iron reaches 1567°C, it is released into the ladle. During the process of the molten iron being released from the furnace, ferrovanadium particles with a particle size of 8-15mm are added along with the molten iron flow (the chemical com...

Embodiment 3

[0025] A kind of hypereutectic wear-resistant high chromium cast iron and its preparation method, which adopts 1000 kg medium frequency induction furnace for smelting, and the specific preparation process steps are:

[0026]①Smelt scrap steel, recarburizer, ferrochrome, ferro-niobium, ferro-vanadium, ferrosilicon, ferro-manganese, ferro-boron, metal aluminum and other furnace materials in a 1000 kg intermediate frequency induction furnace to obtain hypereutectic high-chromium cast iron molten iron. The chemical composition and mass fraction of eutectic high chromium cast iron molten iron are controlled at 4.93%C, 28.84%Cr, 2.33%Nb, 3.76%V, 0.45%Si, 0.62%Mn, 0.69%B, 0.72%Al, 0.028%S , 0.037% P, and the balance Fe, when the temperature of the molten iron reaches 1583°C, it is released into the ladle. During the process of the molten iron being released from the furnace, ferrovanadium particles with a particle size of 8 to 15mm are added along with the molten iron flow (the chemic...

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Abstract

The invention discloses wear-resisting hypereutectic high-chromium cast iron and a preparation method thereof and belongs to the technical field of wear resisting materials. An electric induction furnace is used for smelting furnace materials such as waste steel, a carburant, ferrochromium, ferroniobium, ferrovanadium, ferrosilicon, ferromanganese, ferroboron and metallic aluminum to obtain hypereutectic high-chromium cast iron liquid; when the iron liquid is discharged from the furnace, ferrovanadium particles, ferrotitanium particles and ferrosilicon particles of which the particle size is 8mm to 15mm are added with iron liquid flow; the added amounts are respectively 1.2% to 1.5%, 0.8% to 1.0% and 0.6% to 0.8% of the mass percentage of the iron liquid which enters a casting ladle; the iron liquid can be tempered in a cast state for use after being cast into a cast piece; the wear-resisting hypereutectic high-chromium cast iron is excellent in wear resistance and simple and convenient in production process.

Description

technical field [0001] The invention relates to a wear-resistant high-chromium cast iron and a preparation method thereof, in particular to a hypereutectic wear-resistant high-chromium cast iron and a preparation method thereof, belonging to the technical field of wear-resistant materials. Background technique [0002] Due to the large amount of high hardness M in high chromium cast iron 7 C 3 It has excellent wear resistance and has been widely used in the fields of metallurgy, mining, building materials, electric power and chemical industry. In order to improve the wear resistance of high-chromium cast iron, Chinese invention patent CN 104195420 discloses a high-chromium cast iron wear-resistant material and heat treatment method, which uses iron as the main raw material and is equipped with carbon, silicon, manganese, sulfur, phosphorus, chromium, molybdenum , nickel and copper are auxiliary raw materials, which are melted and cast after preparation. It is characterized...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/08C22C37/10
Inventor 魏世忠屈银虎符定梅智小慧符寒光
Owner BEIJING UNIV OF TECH