Super wear-resistant cast steel grinding ball and preparation method thereof

A super wear-resistant and cast steel technology, applied in the field of wear-resistant materials, can solve the problems of low cost performance, high cost, non-wear resistance, etc., and achieve the effect of reducing labor intensity, improving production efficiency, and realizing clean production

Inactive Publication Date: 2011-12-07
HEBEI HEROIC WEAR RESISTANT
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  • Abstract
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Problems solved by technology

The adoption of this casting process has great advantages in terms of technology, economy, and environmental protection. It can reduce labor intensity and high production efficiency, and can effectively overcome the disadvantages of existing manual production. In addition, products with low chromium alloy content are not Wear resistance, although the wear resistance is improved with high chromium alloy content, but the cost is higher and the cost performance is lower

Method used

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  • Super wear-resistant cast steel grinding ball and preparation method thereof

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Embodiment 2

[0075] Embodiment two - embodiment six

[0076] Embodiment 2-Embodiment 6 are respectively a kind of super wear-resistant cast steel grinding balls, and their respective chemical compositions are shown in the following table.

[0077] Embodiment two—the super wear-resistant cast steel grinding ball of embodiment six is ​​prepared according to the following method steps:

[0078] (1) Casting

[0079] After the molten metal containing the chemical composition described in claim 1 or 2 is formed by mechanized lost foam casting, it is cleaned to obtain a casting;

[0080] (2) heating, oil quenching

[0081] Put the casting obtained in the previous step into a high-temperature resistance furnace and heat it to the corresponding temperature, hold it for a corresponding time, then carry out oil quenching, cool it in the oil to below 200°C, and discharge the oil;

[0082] (3) Tempering

[0083] Put it into the tempering furnace, raise the temperature to the corresponding tempering...

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Abstract

The invention relates to a super wear-resistant cast steel grinding ball and a preparation method thereof. The grinding ball is made of the following chemical components in weight percent: C: 0.80-1.10, Si: 0.40-1.20, Mn: 0.50-1.00, Cr: 6.50~8.50, Ti: 0.15~0.20, Re: 0.02~0.03, P<0.03, S<0.03, the balance is Fe; its preparation method adopts mechanized lost foam casting, the casting is heated and kept warm, oil quenched, and then The finished product can be obtained after tempering, which can realize the mechanized mass production of grinding balls, greatly improve production efficiency, reduce labor intensity, and realize clean production. The super wear-resistant cast steel grinding ball prepared by the invention has higher wear resistance, Rockwell hardness and impact toughness than the existing Cr12 high-chromium cast iron grinding ball. The super wear-resistant cast steel grinding ball of the present invention can be used as a wear-resistant material in cement, thermal power, ore dressing and other industries for powder processing.

Description

technical field [0001] The invention relates to a wear-resistant material used in cement, thermal power, ore dressing and other industries, in particular to a super wear-resistant cast steel grinding ball and a preparation method thereof. Background technique [0002] Chromium series alloy cast grinding balls are the main consumable materials widely used in metallurgical beneficiation, cement building materials, thermal power generation and other industries. At present, the grinding balls are all cast iron grinding balls with high carbon content, and the chemical composition in terms of weight percentage is C: 2-3.6, Si: 0.30-1.50, Mn: 0.40-1.50, Cr: 1.00-28, P<0.10 , S<0.06, the balance is Fe. The casting process is mostly manual metal mold molding, and the heat treatment process is mostly air-cooled and quenched, and some are oil-cooled and quenched. [0003] At present, the domestic grinding ball market is basically all cast iron grinding balls except forged balls...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/36C22C38/28
Inventor 武庆存
Owner HEBEI HEROIC WEAR RESISTANT
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