Grinding roller and preparation method thereof

A grinding roll and roll body technology, applied in the field of wear-resistant carbide-coated composite grinding roll and its preparation, can solve the problems of low coating bonding strength, low production efficiency, and demanding production equipment

Active Publication Date: 2015-04-22
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] At present, the methods for preparing carbide coatings include chemical vapor deposition, physical vapor deposition, thermal spraying, and thermal immersion plating, etc., but these methods have the disadvantages of demanding production equipment, low production efficiency, and low coating bonding strength.

Method used

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  • Grinding roller and preparation method thereof
  • Grinding roller and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1: the preparation method of grinding roller, comprises the steps:

[0072] 1. First prepare a vanadium plate 1, wherein the purity of vanadium should be controlled at 99.7%. The vanadium plate 1 should be surface treated first, and the steps are as follows:

[0073] The first step is pickling, choose 300ml / L hydrochloric acid, and then rinse with running water;

[0074] In the second step of pickling, choose 300ml / L hydrofluoric acid, and then rinse with running water;

[0075] The third step is surface grinding, using 800 mesh Al 2 o 3 Sandpaper and finally ultrasonic cleaning with alcohol. The thickness of the vanadium plate 1 is controlled at 0.2mm.

[0076] 2. According to the working force of the grinding roller, the main wear part is the surface of the roller body. Therefore, the external carbon source 3 is fixed on the inner wall of the pipe mold 2. The external carbon source 3 is graphite paper, and the graphite paper is above grade three , a pur...

Embodiment 2

[0084] Embodiment 2: the preparation method of grinding roller, comprises the steps:

[0085] 1. First prepare a vanadium plate 1, wherein the purity of vanadium should be controlled at 99.8%. The vanadium plate 1 should be surface treated first, and the steps are as follows:

[0086] The first step is pickling, 60ml / L phosphoric acid, and then rinse with running water;

[0087] The second step is pickling, 200ml / L sulfuric acid, and then rinse with running water;

[0088] The third step is surface grinding, using 1000 mesh Al 2 o 3 Sandpaper and finally ultrasonic cleaning with alcohol. The thickness of the vanadium plate 1 is controlled at 1 mm.

[0089] 2. According to the working force of the grinding roller, the main wear part is the surface of the roller body. Therefore, the external carbon source 3 is fixed on the inner wall of the austenitic stainless steel conical tube mold 2 of the centrifuge, and the external carbon source 3 is graphite paper. , the graphite p...

Embodiment 3

[0097] Embodiment 3: the preparation method of grinding roller, comprises the steps:

[0098] 1. First prepare a vanadium plate 1, wherein the purity of vanadium should be controlled at 99.8%. The vanadium plate 1 should be surface treated first, and the steps are as follows:

[0099] The first step is pickling, 120ml / L hydrogen peroxide, and then rinse with running water;

[0100] The second step is pickling, 240ml / L hydrogen peroxide, and then rinse with running water;

[0101] The third step is surface grinding, using 1000 mesh Al 2 o 3 Sandpaper and finally ultrasonic cleaning with alcohol. The thickness of the vanadium plate 1 is controlled at 0.35mm.

[0102] 2. According to the working force of the grinding roller, the main wear part is the surface of the roller body. Therefore, the external carbon source 3 is fixed on the inner wall of the austenitic stainless steel conical tube mold 2 of the centrifuge, and the external carbon source 3 is graphite paper. , the g...

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Abstract

The invention provides a grinding roller; a carbide coating layer is arranged on the surface of a roller body; a roller core adopts a grey cast iron matrix; and the invention further provides a preparation method for obtaining the grinding roller. The carbide coating layer comprises a V2C compact ceramic layer, and can further comprise a micron V8C7 compact ceramic layer and a fusion layer of V8C7 and a matrix. The V2C compact ceramic layer, the micron V8C7 compact ceramic layer and the fusion layer of V8C7 and the matrix are gradiently distributed in sequence. The carbide coating layer and the matrix are metallurgically bonded, so that the binding force is strong, the problems of weak binding force and easy particle dropping due to traditional non-metallurgic bonding between hard particles and metal matrix are overcome, and the surface wear resistance of the roller body of the grinding roller is largely improved.

Description

technical field [0001] The invention relates to a composite grinding roller with a wear-resistant coating and a preparation method thereof, in particular to a composite grinding roller with a wear-resistant carbide coating and a preparation method thereof, in particular to a composite grinding roller applied to the surface of gray cast iron A wear-resistant carbide-coated composite grinding roller and a preparation method thereof. Background technique [0002] In coal, metallurgy, mining, electric power, building materials, refractory materials, energy and other industries, grinding rollers are widely used in modern cement, electric power, coal, chemical and other industries. Due to the limitations of wear-resistant materials in the early stage, It can only be used for grinding soft objects, and its operating condition determines the economic benefits of the enterprise to a certain extent. This is especially true for the grinding rollers of medium-speed coal mills and verti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/02B22D19/00C21D9/38C23C8/64B02C15/00
CPCB02C15/004B22D13/02B22D19/16C21D9/38C23C8/46
Inventor 许云华叶芳霞梁淑华燕映霖钟黎声赵娜娜任冰邹军涛肖鹏
Owner XIAN UNIV OF TECH
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