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Rare-earth alloy chrome cast ball/ cast section and preparation method of cast ball/case section

A rare-earth alloy and chromium-based technology, which is applied in the field of casting, can solve the problems of increased consumption of grinding balls, reduced boiler service life, and large consumption, and achieves the effects of saving energy and raw material consumption, reducing operating costs, and extending service life

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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ball mill is widely used in cement, mining, thermal power, building materials and other industries. Grinding ball is the most commonly used grinding body in ball mill, and consumes the most in use. With the development of industry, the mill gradually tends to be larger. Ordinary The formula and the wear resistance, hardness, toughness and impact resistance of the grinding balls processed by traditional processing methods can no longer meet the requirements of the existing large-scale mills, resulting in a substantial increase in the consumption of grinding balls, which not only consumes a large amount of steel materials , and a large amount of iron powder enters the boiler, corrodes the boiler parts and reduces the service life of the boiler

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A rare earth alloy chromium series cast ball and cast segment, containing the following components by weight percentage: 2.5% C, 0.5% Si, 0.20% Mg, 18.0% Cr, 0-0.05% S, 0-0.05% % of P, 0.1% of rare earth and the rest of Fe as raw materials.

[0015] A method for preparing rare earth alloy chromium series cast balls and cast segments, comprising the following steps:

[0016] (1) Carry out component testing of steel, select steel with qualified C, P, and S contents as the main material, then add ferrochrome according to the ratio stated in the above formula, and send it to the melting furnace for heating and smelting. When the temperature of molten iron reaches 1480°C When the temperature reaches 1540°C, samples are taken for chemical component analysis, and the weight percentage of each component is controlled by fine-tuning. When the temperature reaches 1540°C, precipitation deoxidation and final deoxidation are carried out in sequence;

[0017] (2) Cool the deoxidized...

Embodiment 2

[0021] A rare earth alloy chromium series cast ball and cast segment, containing the following components by weight percentage: 3.8% C, 1.5% Si, 1.00% Mg, 22.0% Cr, 0-0.05% S, 0-0.05% % of P, 0.20% of rare earth and the balance of Fe are raw materials.

[0022] A method for preparing rare earth alloy chromium series cast balls and cast segments, comprising the following steps:

[0023] (1) Carry out component detection to iron and steel, select the iron and steel with qualified C, P, S content as the main material, then add ferrochrome according to the ratio stated in the above formula, send it into the smelting furnace for heating and smelting, when the temperature of molten iron reaches 1480 ~ At 1500°C, samples are taken for chemical composition analysis, and the weight percentage of each component is controlled by fine-tuning. When the temperature reaches 1560°C, precipitation deoxidation and final deoxidation are carried out in sequence;

[0024] (2) Cool the deoxidized ...

Embodiment 3

[0028] A rare earth alloy chromium series cast ball and cast segment, containing the following components by weight percentage: 2.8% C, 0.8% Si, 0.40% Mg, 19% Cr, 0-0.05% S, 0-0.05% % of P, 0.20% of rare earth and the balance of Fe are raw materials.

[0029] A method for preparing rare earth alloy chromium series cast balls and cast segments, comprising the following steps:

[0030] (1) Carry out component testing of steel, select steel with qualified C, P, and S contents as the main material, then add ferrochrome according to the ratio stated in the above formula, and send it to the melting furnace for heating and smelting. When the temperature of molten iron reaches 1490°C When the temperature reaches 1550°C, samples are taken for chemical component analysis, and the weight percentage of each component is controlled by fine-tuning. When the temperature reaches 1550°C, precipitation deoxidation and final deoxidation are carried out in sequence;

[0031] (2) Cool the deoxidi...

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Abstract

The invention discloses a rare-earth alloy chrome cast ball / cast section, comprising the following components in percentage by weight: 2.5%-3.8% of C, 0.5-1.5% of Si, 0.20%-1.00% of Mg, 18.0%-22.0% of Cr, 0%-0.05% of S, 0%-0.05% of P, 0.1%-0.20% of rare earth and the balance of Fe. By adopting a specific ingredient formula, through modification of rare earth, the obtained super wear-resistant high-chrome multi-alloy cast ball is high in abradability, high in hardness, high in tenacity and high in impact resistance, thus the service life of the cast ball is prolonged, energy consumption and consumption of raw materials are saved, and the operation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a rare earth alloy chromium series cast ball, a cast segment and a preparation method thereof. Background technique [0002] Wear is one of the main forms of workpiece failure, and wear causes a large amount of energy and steel raw material consumption. Ball mill is widely used in cement, mining, thermal power, building materials and other industries. Grinding ball is the most commonly used grinding body in ball mill, and consumes the most in use. With the development of industry, the mill gradually tends to be larger. Ordinary The formula and the wear resistance, hardness, toughness and impact resistance of the grinding balls processed by traditional processing methods can no longer meet the requirements of the existing large-scale mills, resulting in a substantial increase in the consumption of grinding balls, which not only consumes a large amount of steel materials , and a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08C21D5/00
Inventor 胡朝阳金义才