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: 2016-10-05
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 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 rest is Fe;

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

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

[0024] S2: The castings obtained in S1 are kept at 860℃ for 3 hours, then water quenched, the quenched castings are heated to 250℃ for tempering treatment, after holding for 1.5 hours, they are moved into a slow cooling pit and slowly cooled to room temperature to obtain resistance Finished grinding steel ball.

Embodiment 2

[0026] An impact-resistant steel ball for 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 rest is Fe;

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

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

[0030] S2: The casting obtained in S1 is kept at 870℃ for 2.5 hours, then water quenched, the quenched casting is heated to 260℃ for tempering treatment, after holding for 1 hour, it is moved into a slow cooling pit and slowly cooled to room temperature to obtain resistance Finished grinding steel ball.

Embodiment 3

[0032] An impact-resistant steel ball for 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 rest is Fe;

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

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

[0036] S2: The casting obtained in S1 is kept at 850°C for 3.5 hours, and then water quenched. The quenched casting is heated to 240°C for tempering treatment. After holding for 2 hours, it is moved into a slow cooling pit and slowly cooled to room temperature to obtain resistance Finished grinding steel ball.

[0037] In the above embodiments, the com...

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PUM

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Abstract

The invention discloses an impact-resistant steel ball for a ball mill. The weight percentages of the components are as follows: C: 0.6%-0.8%; Si: 0.2%-0.3%; Cr: 1.5%-2.3%; Mn: 0.6% ‑0.8%; Ni: 0.2%‑0.3%; Ti: 0.04%‑0.06%; Al: 0.6%‑1.2%; W: 0.05%‑0.1%; Mo: 0.15%‑0.25%; S: 0‑0.02% ; P: 0‑0.06%; the remaining material is Fe; in the preparation process, the impact-resistant steel balls for the ball mill are prepared according to the following process steps: S1: Weigh the raw materials according to the weight percentage of each component and smelt them. Refining in , and final deoxidation in the later stage of refining, pouring, casting and cleaning, to obtain castings; S2: The castings obtained in S1 are kept at 850-870°C for 2.5-3.5 hours, then water quenched, quenched The final casting is heated to 240-260°C for tempering treatment, and after 1-2 hours of heat preservation, it is moved into a slow cooling pit and slowly cooled to room temperature to obtain a finished wear-resistant steel ball.

Description

Technical field [0001] The invention relates to the technical field of grinding machinery, 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 wear-resistant material consumable in the crushing industry. Each year, the domestic beneficiation industry alone needs to consume about 2 million tons of steel balls of various materials, and my country's cement industry also needs to consume 200,000 tons per year. Wear-resistant steel balls are important basic components of ball mills. In particular, precision industrial steel balls play a huge role in the development of the national economy. They are widely used in cement plants, power plants, etc. [0003] The impact-resistant steel balls used in ball mills have 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 point or line c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C21D9/36
Inventor 熊夏鸣
Owner NINGGUO SOUTHERN WEAR RESISTANT MATERIALS
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