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Wear-resistant alloy, silicon alloy grinding ball, silicon alloy grinding section and preparation method thereof

A wear-resistant alloy and silicon alloy technology, applied in the field of wear-resistant alloys in the field of metallurgical technology, can solve the problems of low chromium content in silicon alloy grinding balls and silicon alloy grinding sections, and are not easy to break and wear, and achieve excellent impact damage resistance. capacity, improve the efficiency of the mill, and save energy

Inactive Publication Date: 2013-03-13
清原满族自治县三方耐磨材料有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a new wear-resistant alloy and grinding balls and grinding segments. The technical problem to be solved is that the chromium content of the silicon alloy grinding balls and silicon alloy grinding segments made of the wear-resistant alloy is low, And it is not easy to break and wear, so it is more suitable for practical use, and has great industrial use value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] Preparation method of wear-resistant alloy material

[0029] Follow the steps below:

[0030] Step 1, batching, adding pig iron, ferrosilicon and ferromanganese to an intermediate frequency electric furnace to smelt molten iron. In this step, one or more of ferromolybdenum, ferrochrome and recarburizer can also be added;

[0031] Step 2, the molten iron is tempered, using a spectral direct reading instrument to detect the composition of the molten iron, and using a general conditioning method, so that the composition of the molten iron is, in terms of weight percentage, carbon is 3.30-4.70%, silicon is 1.0-3.50%, Manganese is 0.30-1.60%, chromium is 0.10%-1.40%, and the balance is iron and unavoidable impurities; if ferromolybdenum is added in step 1, the content of molybdenum is adjusted to 0.1-1.10%;

[0032] Step 3, out of the furnace and tempered, the temperature of the molten iron is 1500-1800°C, adding rare earth magnesium and ferrosilicon into the ladle, pourin...

Embodiment 1

[0037] Step 1, add 1020 kg of national standard GB718-82, 14# pig iron, 20 kg of ferrosilicon (content 72%), 20 kg of ferromanganese (content 65%), and 5 kg of ferromolybdenum (content 60%) into the intermediate frequency electric furnace for smelting into molten iron;

[0038] Step 2, adopt spectral direct-reading instrument to detect molten iron composition, and adopt general tempering method, make the composition of molten iron, by weight percentage, carbon is 3.30% (for the national standard pig iron comes), silicon is 3.20%, manganese is 1.50%, chromium is 0.10% (provided by the national standard pig iron), molybdenum is 0.3%, and the balance is iron and unavoidable impurities;

[0039] Step 3: When the temperature of the molten iron reaches 1550°C, it is released from the furnace. Before the furnace is released, 13 kg of rare earth magnesium and 6 kg of ferrosilicon (content 72%) are put into the ladle, and then the molten iron is poured into the ladle to incubate and bo...

Embodiment 2

[0047] Step 1, the national standard GB718-82, 1020 kg of 14# pig iron, 18 kg of ferrosilicon (content 72%), 1.5 kg of ferromanganese (content 65%), 20.6 kg of ferrochrome (content 58%), industry standard YB / T192- 6.5 kg of 2001 type recarburizer (content 98%) is added to the intermediate frequency electric furnace for smelting into molten iron;

[0048] Step 2, adopt the spectral direct-reading instrument to detect the composition of molten iron, and adopt the general tempering method, make the composition of molten iron, by weight percentage, carbon is 3.90%, silicon is 2.60%, manganese is 1.0%, and chromium is 1.3% %;

[0049] Step 3: When the temperature of the molten iron reaches 1500°C, it is released from the furnace. Before the furnace is released, 15 kg of rare earth magnesium and 7 kg of ferrosilicon according to the national standard GB 4138-1984 are put into the ladle, and then the molten iron is poured into the ladle to incubate and boil. The molten iron is cast ...

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Abstract

The invention relates to a wear-resistant alloy, a silicon alloy grinding ball, a silicon alloy grinding section and a preparation method thereof. The wear-resistant alloy comprises the following substances in percentage by weight: 3.30-4.5% of carbon, 1.0-3.20% of silicon, 0.30-1.50% of manganese, 0.10%-1.30% of chromium, 0.006%-0.07% of rare earth, 0.007%-0.08% of magnesium and the balance of iron and inevitable impurities. The wear-resistant alloy provided by the invention has low content of the chromium and has the advantages of excellent resistance to impact fracture, wear resistance, crushing resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a wear-resistant alloy in the technical field of metallurgy, in particular to a wear-resistant alloy casting, a grinding ball, a grinding section and a preparation method for cement mills and mine mills. Background technique [0002] With the development of industry, the mill tends to be large-scale, and the problem of the diameter of the grinding balls used has gradually become prominent, especially for mining mills with a diameter greater than 8 meters, the use of low-chromium alloy grinding balls cast by current existing technology materials , the breakage rate exceeds 10%, which seriously affects the output rate and product quality of the mill; if forged balls are used instead, the current forged balls are made of medium-high carbon steel or rail steel, and the amount of alloy added is small, the hardenability is poor, and the surface Although the hardness can reach HRC50-55, the hardness of the core is only about HRC35. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/06C22C33/10B02C17/20
Inventor 刘火林章学良吴明球
Owner 清原满族自治县三方耐磨材料有限公司
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