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Impact-resistant steel ball for ball mill

An impact-resistant, ball mill technology, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve the problems of high cost, wear resistance can not meet the grinding requirements, etc., to achieve the effect of improving comprehensive performance and optimizing the preparation process

Inactive Publication Date: 2014-10-29
NINGGUO SOUTHERN WEAR RESISTANT MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, impact-resistant steel balls for ball mills usually use carbon steel balls, whose wear resistance cannot meet the grinding requirements. In order to improve wear resistance, high-alloy wear-resistant steel balls are used, and the cost is too high, so it needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] An impact-resistant steel ball for a ball mill, the weight percentage of each component is as follows:

[0021] C: 0.70%; Si: 0.25%; Cr: 2.0%; Mn: 0.7%; Ni: 0.25%; Ti: 0.050%; Al: 0.9%; W: 0.08%; Mo: 0.20%; S: 0.010%; P: 0.02%; the remainder is Fe;

[0022] During the preparation process, the impact-resistant steel balls for the ball mill were prepared according to the following process steps:

[0023] S1: Weigh the raw materials according to the weight percentage of each component for smelting, carry out refining in the refining device, and carry out final deoxidation in the later stage of refining, pouring, after casting and forming, cleaning to obtain castings;

[0024] S2: Keep the casting obtained in S1 at 860°C for 3 hours, then quench it in water, raise the temperature of the quenched casting to 250°C for tempering treatment, and after holding it for 1.5 hours, move it into the slow cooling pit and slowly cool it to room temperature to obtain the resistance Gri...

Embodiment 2

[0026] An impact-resistant steel ball for a ball mill, the weight percentage of each component is as follows:

[0027] C: 0.8%; Si: 0.3%; Cr: 2.3%; Mn: 0.8%; Ni: 0.3%; Ti: 0.06%; Al: 1.2%; W: 0.1%; Mo: 0.25%; S: 0.02%; P: 0.06%; the remainder is Fe;

[0028] During the preparation process, the impact-resistant steel balls for the ball mill were prepared according to the following process steps:

[0029] S1: Weigh the raw materials according to the weight percentage of each component for smelting, carry out refining in the refining device, and carry out final deoxidation in the later stage of refining, pouring, after casting and forming, cleaning to obtain castings;

[0030] S2: Keep the casting obtained in S1 at 870°C for 2.5 hours, then quench it in water, raise the temperature of the quenched casting to 260°C for tempering treatment, and after holding it for 1 hour, move it into the slow cooling pit and slowly cool it to room temperature to obtain the resistance Grinding s...

Embodiment 3

[0032] An impact-resistant steel ball for a ball mill, the weight percentage of each component is as follows:

[0033] C: 0.6%; Si: 0.2%; Cr: 1.5%; Mn: 0.6%; Ni: 0.2%; Ti: 0.04%; Al: 0.6%; W: 0.05%; Mo: 0.15%; S: 0.005%; P: 0.01%; the remainder is Fe;

[0034] During the preparation process, the impact-resistant steel balls for the ball mill were prepared according to the following process steps:

[0035] S1: Weigh the raw materials according to the weight percentage of each component for smelting, carry out refining in the refining device, and carry out final deoxidation in the later stage of refining, pouring, after casting and forming, cleaning to obtain castings;

[0036] S2: Keep the casting obtained in S1 at 850°C for 3.5 hours, then quench it in water, raise the temperature of the quenched casting to 240°C for tempering treatment, and after holding it for 2 hours, move it into the slow cooling pit and slowly cool it to room temperature to obtain the resistance Grindin...

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Abstract

The invention discloses an impact-resistant steel ball for a ball mill. The impact-resistant steel ball comprises the following components in percentage by weight: 0.6%-0.8% of C, 0.2%-0.3% of Si, 1.5%-2.3% of Cr, 0.6%-0.8% of Mn, 0.2%-0.3% of Ni, 0.04%-0.06% of Ti, 0.6%-1.2% of Al, 0.05%-0.1% of W, 0.15%-0.25% of Mo, 0%-0.02% of S, 0%-0.06% of P and the balance of Fe. The impact-resistant steel ball for the ball mill is prepared by virtue of the following process steps in the preparation process: S1, weighing raw materials according to the weight percentage of the components, smelting, refining in a refining device, carrying out final deoxidization at the late stage of the refining, pouring, shaping through casting, and then cleaning to obtain a cast; S2, carrying out heat preservation on the cast obtained from the S1 at 850-870 DEG C for 2.5-3.5 DEG C, then carrying out water quenching, increasing the temperature of the quenched cast to 240-260 DEG C, carrying out tempering treatment, carrying out heat preservation for 1-2 hours, transferring into a delayed cooling pit, and slowly cooling to room temperature to obtain an abrasion-resistant steel ball finished product.

Description

technical field [0001] The invention relates to the technical field of grinding machines, in particular to an impact-resistant steel ball for a ball mill. Background technique [0002] Impact-resistant steel balls for ball mills are the largest consumption of wear-resistant materials in the crushing industry. The domestic mineral processing industry alone needs to consume about 2 million tons of steel balls of various materials every year, and my country's cement industry also needs to consume 200,000 tons every year. Wear-resistant steel balls are important basic components of ball mills, especially precision industrial steel balls play a huge role in the development of the national economy, and are widely used in cement plants, power plants, etc. [0003] The impact-resistant steel balls used in ball mills are in very complicated working conditions during operation. When the moving parts are running at high speed, the steel balls and their supporting devices are mainly in ...

Claims

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Application Information

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IPC IPC(8): C22C38/50C21D9/36
Inventor 熊夏鸣
Owner NINGGUO SOUTHERN WEAR RESISTANT MATERIALS
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