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High-chromium grinding ball and secondary modification process thereof

A technology of secondary deterioration and processing technology, applied in the direction of improving process efficiency, can solve the problems of reducing the service life of boilers, high consumption, large steel materials, etc., to save the consumption of raw materials, prolong the service life, and reduce operating costs. Effect

Inactive Publication Date: 2010-11-03
宁国市开源电力耐磨材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Grinding ball is the most commonly used grinding body in ball mills, and consumes the most in use. With the development of industry, mills tend to be larger. The wear resistance, hardness, and toughness of ordinary formulas and balls processed by traditional processing methods And the impact resistance 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, but also a large amount of iron powder enters the boiler, corrodes the boiler parts, and reduces the use of the boiler life

Method used

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  • High-chromium grinding ball and secondary modification process thereof
  • High-chromium grinding ball and secondary modification process thereof
  • High-chromium grinding ball and secondary modification process thereof

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Embodiment 1

[0017] Prepare high chromium grinding balls as follows:

[0018] (1) 100 kg of steel is tested for composition. According to the test results, the content of C, S, and P (preferably the content results of the supplementary test) are all within the required range, and the types of other elements contained meet the requirements. And the content does not exceed the standard, add 0.7 kg of ferrosilicon with a silicon content of 70%, 0.8 kg of ferromanganese with a manganese content of 60%, 23.5 kg of ferrochrome with a chromium content of 58%, and 0.021 kg of molybdenum in qualified steel. 55% ferromolybdenum is sent to the smelting furnace for heating and smelting. When the temperature of molten iron reaches 1480°C, samples are taken for chemical composition analysis, C: 2.63%, Si: 0.47%, Mn: 0.48%, Cr: 10.86%, P : 0.029%, S: 0.023%, Mo: 0.048, B: 0.0019%, Ti: 0.010%, V: 0.027%, all components are within the required range, without fine-tuning, when the temperature reaches 1550 ℃...

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Abstract

The invention discloses a high-chromium grinding ball which is prepared from the following materials in percentage by weight: 1.80-3.20% of C, 0.30-1.00% of Si, 0.20-1.00% of Mn, 10.00-13.00% of Cr, 0-0.10% of S, 0-0.10% of P, 0-0.10% of Mo, 0-0.005% of B, 0-0.020% of Ti, 0-0.060% of V and balance of Fe, and is processed by a special secondary modification process, wherein the weight ratio of Ti to B is larger than 3, and the weight ratio of V to Ti is larger than 2.8. The high-chromium grinding ball prepared by using the formula and the process of the invention has the characteristics of favorable wear resistance, high rigidity, high toughness and high impact resistance.

Description

technical field [0001] The invention relates to a grinding ball and a processing method thereof, in particular to a high-chromium grinding ball and a secondary modification processing technology 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. Grinding ball is the most commonly used grinding body in ball mills, and consumes the most in use. With the development of industry, the mill tends to be larger. The wear resistance, hardness, and toughness of ordinary formula and traditional processing methods And the impact resistance 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, but also a large amount of iron powder enters the boiler, corrodes the boiler parts, and reduces the use of the boiler life. Therefo...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C38/54C22C33/04C21C7/06C21C7/00C21D1/18
CPCY02P10/20
Inventor 汪德发徐超汤新明
Owner 宁国市开源电力耐磨材料有限公司
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