Method for preparing composite wear-resistant roller

A roller and alloy powder technology, which is applied in the preparation of composite wear-resistant rollers, and in the field of composite wear-resistant rollers, can solve problems affecting the normal operation of the conveying system, short service life of metal rollers, and increased labor intensity of workers, and achieve internal organization Excellent, improved overall performance, and firm interface

Inactive Publication Date: 2009-04-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor wear resistance of ordinary steel, the metal drum is severely worn in the feeding system, so the service life of the metal drum is short and the replacement is frequent
It leads to increased production costs, increased labor intensity of workers, and seriously affects the normal work of the conveying system

Method used

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  • Method for preparing composite wear-resistant roller
  • Method for preparing composite wear-resistant roller
  • Method for preparing composite wear-resistant roller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Preparation of a rod-shaped composite wear-resistant roller with high chromium alloy as the hard phase and A3 steel as the matrix

[0026] 1. Use 3mm diameter alloy powder core bar 1 to make bundles, and the loaded alloy powder is high-carbon ferrochrome powder, with a particle size of 100-150 mesh, and cut to the same height as the wall thickness of the drum;

[0027] 2. Use resin sand to make wear-resistant roller mold 2 according to the casting process requirements;

[0028] 3. The alloy powder core rod 1 is arranged in the cavity of the casting mold 2 of the wear-resistant roller according to the ratio of 50% of the volume of the wear-resistant roller;

[0029] 4. Select A3 steel as the base metal 3. After smelting and melting in an intermediate frequency furnace, it reaches 1600°C and is released from the furnace. The molten steel is poured into the cavity of the wear-resistant roller mold 2 until it is full;

[0030] 5. Cool at room temperature. After ...

Embodiment 2

[0032] Example 2: Preparation of a rod-shaped composite wear-resistant roller with tungsten carbide as the hard phase and A3 steel as the matrix

[0033] 1. Select alloy powder core rod 1 with a diameter of 5mm. The alloy powder is tungsten carbide alloy powder with a particle size of 150 mesh and cut to the same length as the drum wall thickness;

[0034] 2. Use resin sand to make mold 2 according to the casting process requirements;

[0035] 3. The alloy powder core rod 1 is preset in the cavity of the wear-resistant roller mold 2 according to the ratio of 40% of the volume of the wear-resistant roller;

[0036] 4. Select A3 steel as the base metal 3. After smelting and melting in an intermediate frequency furnace, it reaches 1600°C and is released from the furnace. The molten steel is poured into the cavity of the wear-resistant roller mold 2 until it is full;

[0037] 5. Cool at room temperature. After the molten metal is cooled and solidified, take out the casting and cl...

Embodiment 3

[0038] Example 3: Preparation of a rod-shaped composite wear-resistant roller with tungsten carbide as the hard phase and high manganese steel as the matrix

[0039] 1. Select alloy powder core rod 1 with a diameter of 3mm. The alloy powder is tungsten carbide alloy powder with a particle size of 50-80 mesh, and it is cut to the same length as the drum wall thickness;

[0040] 2. Use resin sand to make mold 2 according to the casting process requirements;

[0041] 3. The alloy powder core rod 1 is preset in the cavity of the wear-resistant roller mold 2 according to the ratio of 60% of the volume of the wear-resistant roller;

[0042] 4. Select high manganese steel Mn13 as the base metal 3. After smelting and melting in an intermediate frequency furnace, it reaches 1650°C and is released from the furnace. The molten steel is poured into the cavity of the wear-resistant roller mold 2 until it is full;

[0043] 5. Cool at room temperature. After the molten metal is cooled and s...

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Abstract

The invention discloses a method for preparing a composite antiwear roller, which is characterized by comprising the following steps: alloy dust core bars are bound into bundles and arranged in a roller casting mould cavity, and the volume of the alloy dust core bars accounts for 20 to 60 percent of the total volume of the antiwear roller; molten matrix metal is cast into the casting mould cavity, the alloy dust core bars are melted and dissolved under the heat effect of the matrix metal, a great number of alloy elements and the molten matrix metal generate metallurgical combination reaction so as to generate a highly dispersed alloy structure on the original position; and finally the alloy structure is cooled and solidified, and the bar-shaped hard phase is metallurgically and transitionally combined into a whole with the matrix metal, thereby preparing the composite antiwear roller which takes the high-strength and high-ductility metal as the matrix and contains a certain number of metallurgically combined bar-shaped hard points. The composite antiwear roller has high strength and high ductility of the matrix metal and high hardness and high wear resistance of the hard phase, can simultaneously bear high pressure and strong wear, and has the characteristics of long service life, low price and so on.

Description

technical field [0001] The invention relates to the preparation of a roller for conveying systems in industries such as electric power, metallurgy, and mines, in particular to a method for preparing a composite wear-resistant roller. The composite wear-resistant roller prepared by the method contains columnar hard points, realizing the The organic unity of abrasiveness and toughness makes the overall performance of the drum significantly improved. Background technique [0002] In mining, metallurgy, electric power, coal and other industries, the transportation of materials is very common. In the current material conveying system, metal rollers processed from steel are mostly used as the conveying carrier. Due to the poor wear resistance of ordinary steel, the metal drum wears very seriously in the feeding system, so the service life of the metal drum is short and the replacement is frequent. It leads to increased production costs, increased labor intensity of workers, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/08
Inventor 许云华刘文刚岑启宏牛立斌付永红武宏王永平
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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