High-wearable extrusion roller of roller press and manufacture process thereof

A technology of extrusion rollers and roller presses, which is applied in the field of extrusion rollers of high wear-resistant roller presses, can solve the problems that the wear resistance cannot meet the requirements of use, and achieve improved equipment utilization, good impact resistance, and reduced replacement The effect of times

Inactive Publication Date: 2012-05-09
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before the present invention, the extrusion roller of conventional roller press generally adopts the method for surfacing welding to carry out surface wear-resisting treatment, and its wear-resistant alloy generally selects Fe-Cr-C-Mo-W series surfacing alloy for use, also has in above-mentioned surfacing alloy B, V, Ti and other alloying elements are added to improve the wear resistance, but in actual work, the wear resistance often cannot meet the requirements of use. For example, the cement production line with a daily output of 2,000 tons is made by the above-mentioned surfacing method. The extrusion roller of the roller press needs to be replaced or repaired after about 6000 working hours

Method used

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  • High-wearable extrusion roller of roller press and manufacture process thereof
  • High-wearable extrusion roller of roller press and manufacture process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The pressure roller of the roller press machine has a diameter of 400mm and a length of 400mm. A circular groove is processed on the surface of the extrusion roller. The diameter of the groove is 8mm, the depth is 6mm, and the distance between the grooves is 3mm. The arrangement of circular slots is as follows figure 1 shown. Carbide is made of a round table with a diameter of 8mm and a height of 10mm. The cemented carbide composition is WC 66%; TiC 30%; Co 3.9%; Cr 0.1%. Place brazing solder in the circular groove of the extrusion roller, the brazing filler metal is a copper-based brazing filler metal and its composition is Cu85%; Mn15%. Put the cemented carbide cylinders into all the grooves of the extrusion roller respectively, and braze in the vacuum brazing furnace. After the brazing is completed, a layer of cemented carbide is welded on the surface of the extrusion roller.

Embodiment 2

[0019] The extrusion roller of the roller press has a diameter of 800 mm and a length of 600 mm. A circular groove is processed on the surface of the extrusion roller. The diameter of the groove is 18 mm; the depth of the groove is 10 mm, and the distance between the grooves is 4 mm. The arrangement of circular slots is as follows figure 1 shown. The cemented carbide is made of a round platform with a diameter of 18mm and a height of 12mm. The cemented carbide composition is WC 79%; TiC 15%; Co 5.8%; Cr 0.2%. Place brazing solder in the circular groove on the surface of the squeeze roller, the solder is copper-based solder, and its composition is Cu85%, Mn15%. Put the cemented carbide round tables into all the grooves of the extrusion roller respectively, and braze in the vacuum brazing furnace. After the brazing is completed, a layer of cemented carbide is welded on the surface of the extrusion roller.

Embodiment 3

[0021] The diameter of the pressing roller of the roller press is 800mm, and the length is 600mm. A circular groove is processed on the surface of the extrusion roller. The diameter of the groove is 25mm; the depth of the groove is 12mm, and the distance between the grooves is 6mm. The circular slots are arranged as shown in the figure. The cemented carbide is made of a round table with a diameter of 25mm and a height of 15mm. The cemented carbide composition is WC 92%; TiC 0%; Co 7.7%; Cr 0.3%. Place brazing solder in the circular groove of the extrusion roller, the solder is copper-based solder, and its composition is Cu85%; Mn15%. Put the cemented carbide round tables into all the grooves of the extrusion roller respectively, and braze in the vacuum brazing furnace. After the brazing is completed, a layer of cemented carbide is welded on the surface of the extrusion roller.

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Abstract

The invention relates to a high-wearable extrusion roller of a roller press and a manufacture process thereof, belonging to the technical field of extrusion rollers; circular grooves are machined on the surface of the extrusion roller every 3-6 mm; a hard alloy cylinder is embedded in the groove; the hard alloy cylinder is 2 mm higher than the surface of the extrusion roller; then, hard alloy is connected with the extrusion roller through a brazing method; the hard alloy contains the following components in percentage by weight: 66-92% of WC, 0-30% of TiC, 3.9-8% of Co and 0.1-0.3% of Cr; compared with the overlaying welding method, after the extrusion roller is brazed with the hard alloy, the wearable property is greatly increased; the service life is long; the replacement time of the extrusion roller is reduced; and the equipment utilization rate is increased.

Description

technical field [0001] The invention belongs to the technical field of extrusion rollers, relates to the crushing technology of cement raw meal and clinker, in particular to a high wear-resistant roller press extrusion roller with hard alloy surface strengthening. Background technique [0002] In the cement production process equipped with a roller press, the raw material or clinker needs to be crushed by the roller press. Due to the high hardness of the crushed powder and the large material flow, the extrusion roller of the roller press is seriously worn. Before the present invention, the extrusion roller of conventional roller press generally adopts the method for surfacing welding to carry out surface wear-resisting treatment, and its wear-resistant alloy generally selects Fe-Cr-C-Mo-W series surfacing alloy for use, also has in above-mentioned surfacing alloy B, V, Ti and other alloying elements are added to improve the wear resistance, but in actual work, the wear resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C4/30B23P15/00
Inventor 王智慧许芬贺定勇蒋建敏王国红崔丽
Owner BEIJING UNIV OF TECH
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