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Method for manufacturing abrasion-proof conveying roll with high-temperature erosion resistance

A technology of high temperature corrosion resistance and manufacturing method, applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of surface cracks, coating adhesion and coating brittleness that are rarely used, and achieve a simple manufacturing process. , The effect of reducing stress generation and concentration and improving surface quality

Inactive Publication Date: 2015-03-04
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the reinforcement materials for hot-rolled conveying rolls are mainly high-chromium cast iron, nickel-based self-fluxing alloy, or nickel-based alloy self-fluxing plus carbide mixed powder, and the surface wear-resistant coating is prepared by surfacing welding, spray welding, laser cladding, etc. Layers have achieved certain use effects, but there are also surface crack defects
The coatings formed by supersonic spraying and plasma spraying are rarely used due to the influence of bonding force and coating brittleness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: The conveying roller is made of medium carbon steel roller body and cermet roller working surface; the roller body is welded by medium carbon steel thick-walled steel pipe and the installation roller core, providing the rotation, support and transmission of the roller body The working surface of the cermet roller is at the two ends of the conveying roller, and the NiCrMo-WC alloy with a diameter of 2-6 mm is formed by supersonic flame spraying; NiCrMo-WC is formed into a spherical particle powder material by vacuum melting and gas atomization ;

[0027] Specific process steps:

[0028] (1) Manufacture of conveyor roller body:

[0029] Low-carbon Q345 thick-walled steel pipe with roller core through CO 2 Gas shielded welding becomes the transfer roller body;

[0030] (2) Forming and manufacturing of the working surface of the conveying roller:

[0031] The thick-walled steel pipe at the two ends of the conveyor roller body is turned 2mm in the radial di...

Embodiment 2

[0038] Example 2: The conveying roller is made of two materials: the medium carbon steel roller body and the working surface of the cermet roller; the roller body is welded by medium carbon steel thick-walled steel pipe and the installation roller core, providing the rotation, support and transmission of the roller body; The working surface of the cermet roller is at the two ends of the conveying roller, and the NiCrMo-WC alloy with a diameter of 2-6mm is formed by supersonic plasma spraying; NiCrMo-WC is formed into a spherical particle powder material by vacuum melting and gas atomization;

[0039] Specific process steps:

[0040] (1) Manufacture of conveyor roller body:

[0041] Low-carbon Q345 thick-walled steel pipe with roller core through CO 2 Gas shielded welding becomes the transfer roller body;

[0042] (2) Forming and manufacturing of the working surface of the conveying roller:

[0043] The thick-walled steel pipe at the two ends of the conveyor roller body is t...

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Abstract

The invention provides a method for manufacturing an abrasion-proof conveying roll with high-temperature erosion resistance and belongs to a method for manufacturing a conveying roll for steel rolling and hot rolling. The abrasion-proof conveying roll with high-temperature erosion resistance is manufactured and molded from a medium steel roll body and metal ceramic roll working surfaces; the roll body is formed by welding a medium steel thick wall steel pipe and a mounting roll core, and properties of rotation, support, conveying and the like of the roll body are provided; the roll working surfaces are positioned at two ends of the conveying roll, NiCrMo-WC alloy of 2-6mm is adopted in the radial direction, and the roll working surfaces are formed by virtue of supersonic flame spray coating or supersonic plasma spray coating. The NiCrMo-WC alloy is composed of 4.0-5.5% of C, 10.5-15.5% of Ni, 1.5-15.0% of Cr, 1.0-2.0% of Mo, 0.5-1.5% of Fe and the balance of W and is a spherical particle powdered material formed by virtue of vacuum melting and gas atomization. The conveying roll has the advantages of high-temperature erosion resistance, abrasion-proof property and long service life.

Description

technical field [0001] The invention relates to a method for manufacturing a steel-rolled hot-rolled transfer roller, in particular to a method for manufacturing a high-temperature corrosion-resistant and wear-resistant transfer roller. Background technique [0002] High-quality conveying rollers are becoming the main factors affecting the surface quality of rolled steel profiles. Due to wear and corrosion, defects such as rectangular grooves or "V" grooves or corrosion pits appear on the surface of the conveying rollers. , leading to quality defects such as micro-bulges, cracks, and increased mass per unit length on the surface of the steel. When the conveying roller rotates, its working surface is in constant contact with the hot-rolled section steel for a long time and relies on friction to convey the section steel. The working surface of the conveying roller often fails or is scrapped due to premature local damage due to surface corrosion and wear, which not only affects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C23C4/12C23C4/06B21B39/02C23C4/129C23C4/134
CPCB23P15/00B21B39/02
Inventor 沈承金黄兆海陶庆陈正赖亚伟张永
Owner CHINA UNIV OF MINING & TECH
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