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Multielement low alloy bainite spheroidal graphite cast iron grinding ball and manufacturing method thereof

A technology of bainitic nodular graphite and cast iron grinding balls, which is applied in the field of wear-resistant materials, can solve the problems of poor impact toughness, wear resistance, and low corrosion resistance of grinding balls, and achieve reduced production costs and energy consumption, resource conservation, and high The effect of economic value and social benefit

Inactive Publication Date: 2013-04-03
MAANSHAN HENGDA WEAR RESISTANT MATERIALS
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Problems solved by technology

[0003] The object of the present invention is to provide a multi-element low alloy bainitic nodular cast iron to solve the problems of poor impact toughness, wear resistance and corrosion resistance of the ball Grinding ball and its manufacturing method

Method used

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Embodiment Construction

[0015] The weight percentage of each chemical composition in multi-component low alloy bainite ductile iron grinding ball is: C 3.2-3.5%, Si 2.5-2.8%, Mn 0.3-0.5%, Cr 3.2-3.3%, Mo 0.5-0.8%, Cu 0.5-1.0%, Mg 0.03-0.05%, La 0.02-0.03%, Y 0.02-0.04%, Er 0.02-0.03%, P≤0.08%, S≤0.04%, the balance is Fe.

[0016] A method for manufacturing a multi-element low-alloy bainite ductile iron grinding ball is characterized in that it comprises the following steps:

[0017] (1) Add pig iron, steel scrap, ferromanganese, ferrosilicon, copper, recycled materials and other furnace materials into the smelting furnace according to the weight ratio of the above chemical components for smelting, and the smelting temperature is 1520°C;

[0018] (2) Before being released from the furnace, the spheroidizing agent and the inoculant are respectively subjected to spheroidizing treatment and inoculation treatment in the ladle, and the furnace temperature is 1450°C;

[0019] (3) Before ...

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Abstract

The invention discloses a multielement low alloy bainite spheroidal graphite cast iron grinding ball which comprises the chemical components by weight percentage as follows: 3.2-3.5% of C, 2.5-2.8% of Si, 0.3-0.5% of Mn, 3.2-3.3% of Cr, 0.5-0.8 of Mo, 0.5-1.0% of Cu, 0.03-0.05% of Mg, 0.02-0.03% of La, 0.02-0.04% of Y, 0.02-0.03% of Er, P smaller than or equal to 0.08%, S smaller than or equal to 0.04%, and the balance of Fe. According to the invention, wear resistance, high hardness, high tenacity and high impact resistance of the grinding ball are ensured by optimizing material formula, regulating the casting and melting process and combining a reasonable thermal processing method. Not only is production efficiency of a ball grinding mill improved, but also the production cost and energy consumption are further effectively reduced, the limited resources are saved, and extremely high economical value and social benefit are obtained.

Description

technical field [0001] The invention relates to a multi-component low-alloy bainite ductile iron grinding ball and a manufacturing method thereof, belonging to the technical field of wear-resistant materials. Background technique [0002] Ball mill is the main equipment for the production and processing of powder materials in metallurgical mines, building materials, cement, power chemical industry and other industries. During the working process of ball mill, its grinding ball is used as the end product, which belongs to the main wearable parts. Its usage is large and has a great impact on the cost of use. has always attracted people's attention. With the development of industry, various large-scale ball mills are increasing year by year, and the consumption of grinding balls is also increasing significantly. This not only consumes a large amount of iron and steel materials, but also a large amount of iron powder enters the boiler, corrodes the boiler parts and reduces its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08B22D1/00C21D1/18C21D5/00C21D9/36
Inventor 张在武
Owner MAANSHAN HENGDA WEAR RESISTANT MATERIALS
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