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Wear-resistant and corrosion-resistant steel ball for ball mill and preparation method of steel ball

A ball mill and corrosion-resistant technology, applied in the field of wear-resistant materials, can solve the problems of steel ball corrosion loss, less attention and improvement, increased frequency of equipment shutdown and maintenance, and serious steel ball corrosion loss, etc., to achieve improved corrosion resistance and compactness Enhanced performance and corrosion resistance, low corrosion loss

Active Publication Date: 2021-03-16
ANHUI RUITAI NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the wet grinding condition, the steel ball is worn out due to the synergistic effect of three wear mechanisms: abrasive wear, impact wear and corrosion wear, resulting in a shortened service life
At present, many improvements have been made to the wear resistance of steel balls, but there is not much attention and improvement to the corrosion loss of steel balls
The corrosion loss of steel balls caused by working in corrosive media such as mines is very serious, which also leads to a very fast loss of steel balls used in ball mills in mines and other fields, and a large amount of loss, which not only increases the cost , and because the steel ball needs to be replaced frequently, the frequency of equipment shutdown and maintenance increases, which affects normal production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing steel balls for wear-resistant and corrosion-resistant ball mills, comprising the following steps:

[0029] S1. Heat and melt the raw material of the steel ball matrix at 1500°C in an electric furnace to obtain molten steel, then cast the molten steel to obtain a billet, heat the cast billet to 1150°C for 2 hours, then roll it into a ball, and obtain a steel billet after cooling Spherical matrix, wherein the molten steel includes the following chemical composition by weight percentage: C: 0.8%, Si: 1.5%, Mn: 1.4%, Cu: 0.3%, Cr: 0.8%, the balance is Fe and unavoidable impurities;

[0030] S2. Mix NiAl alloy powder and graphene oxide-coated silicon carbide whiskers evenly at a mass ratio of 25:1 to obtain an intermediate bonding layer powder, and then spray the intermediate bonding layer powder on the steel ball substrate by plasma spraying On the surface, an intermediate bonding layer with a thickness of 80 μm is formed to obtain a coated steel bal...

Embodiment 2

[0038] A method for preparing steel balls for wear-resistant and corrosion-resistant ball mills, comprising the following steps:

[0039] S1. Heat and melt the raw material of the steel ball matrix at 1550°C in an electric furnace to obtain molten steel, then cast the molten steel to obtain a billet, heat the cast billet to 1180°C for 1 hour, roll it into a ball, and obtain a steel billet after cooling Spherical matrix, wherein the molten steel includes the following chemical composition by weight percentage: C: 1.0%, Si: 1.8%, Mn: 1%, Cu: 0.5%, Cr: 1.2%, the balance is Fe and unavoidable impurities;

[0040] S2. Mix NiAl alloy powder and graphene oxide-coated silicon carbide whiskers evenly at a mass ratio of 35:1 to obtain an intermediate bonding layer powder, and then spray the intermediate bonding layer powder on the steel ball substrate by plasma spraying On the surface, an intermediate bonding layer with a thickness of 100 μm is formed to obtain a coated steel ball. The ...

Embodiment 3

[0048] A method for preparing steel balls for wear-resistant and corrosion-resistant ball mills, comprising the following steps:

[0049] S1. Heat and melt the raw material of the steel ball matrix at 1520°C in an electric furnace to obtain molten steel, then cast the molten steel to obtain a billet, heat the cast billet to 1160°C for 1.5 hours, then roll it into a ball and cool it to obtain Steel ball matrix, wherein molten steel includes the following chemical composition by weight percentage: C: 0.85%, Si: 1.65%, Mn: 1.2%, Cu: 0.45%, Cr: 0.95%, the balance is Fe and unavoidable impurities ;

[0050] S2. Mix NiAl alloy powder and graphene oxide-coated silicon carbide whiskers evenly at a mass ratio of 30:1 to obtain an intermediate bonding layer powder, and then spray the intermediate bonding layer powder on the steel ball substrate by plasma spraying On the surface, an intermediate bonding layer with a thickness of 85 μm is formed to obtain a coated steel ball. The process...

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Abstract

The invention discloses a preparation method of a wear-resistant and corrosion-resistant steel ball for a ball mill. The preparation method comprises the following steps that raw materials of a steelball base body are heated and smelted, cast, heated and rolled into balls in an electric furnace, and the steel ball base body is obtained after cooling; NiAl alloy powder and graphene-oxide-coated silicon carbide whiskers are evenly mixed, a middle bonding layer is formed on the surface of the steel ball base body through plasma spraying, and a primarily-coated steel ball is obtained; Cr2O3 powder and SiO2 powder are evenly mixed, the mixture is sprayed to the surface of the primarily-coated steel ball through plasma to form a surface coating layer, and a secondarily-coated steel ball is obtained; and hot isostatic pressing treatment is performed on the secondarily-coated steel ball, and then low-temperature tempering is performed to obtain the wear-resistant and corrosion-resistant steelball for the ball mill. The steel ball prepared with the method has excellent wear resistance and corrosion resistance, low corrosion loss and long service life, and is applicable in application environments of corrosive media such as mines and the like.

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials, in particular to a steel ball for a wear-resistant and corrosion-resistant ball mill and a preparation method thereof. Background technique [0002] Wear-resistant steel ball is a kind of crushing medium used in ball mills, used to crush the materials in the mill, widely used in mining, power generation, cement building materials and other industries. In wet grinding conditions, steel balls are worn out due to the synergistic effect of three wear mechanisms: abrasive wear, impact wear and corrosion wear, resulting in a shortened service life. At present, many improvements have been made to the wear resistance of steel balls, but there is not much attention and improvement to the corrosion loss of steel balls. The corrosion loss of steel balls caused by working in corrosive media such as mines is very serious, which also leads to a very fast loss of steel balls used in ball mills...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/11C23C4/10C23C4/06C23C4/18C21D1/18C22C33/04C22C38/34
CPCC23C4/134C23C4/11C23C4/10C23C4/06C23C4/18C22C33/04C22C38/34C22C38/20C22C38/04Y02P10/20
Inventor 蒋杰彭宗华
Owner ANHUI RUITAI NEW MATERIALS TECH
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