Composite SiC and its making process

A manufacturing method and technology of guide rollers, applied in the direction of manufacturing tools, chemical instruments and methods, rollers, etc., can solve the problems of short service life, low cost of guide rollers, low cost performance, etc., and achieve improved wear resistance, low cost, The effect of rich raw materials

Inactive Publication Date: 2007-03-21
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first few types of guide rollers have low cost, but short service life; high-speed steel guide rollers have serious segregation, eutectic carbides tend to be distributed in a network, are brittle and easy to break; hard alloys have a long service life, but are expensive and not cost-effective

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] By weight, the composition of the composite material is: 15% SiC, 1.0% Cr, 1.0% Mo, 0.5% Nb, and the total amount of Ti, Ni, Mn, V, Zr, RE, Si or B alloying elements does not exceed 2% , the carbon content in the steel matrix of the composite material is 0.4%, and the balance is Fe; the composite material is made into a Φ5mm wire, which is coated on the metal surface by arc thermal spraying to combine with the metal surface.

Embodiment 2

[0031] By weight, the composition of the composite material is: 15% SiC, 1.0% Cr, 1.0% Mo, 0.5% Nb, and the total amount of Ti, Ni, Mn, V, Zr, RE, Si or B alloying elements does not exceed 2% , the carbon content in the steel matrix of the composite material is 0.4%, and the balance is Fe; the above-mentioned composite material raw materials are mixed and ball-milled to make powder, and the method of plasma spraying is used to coat the metal surface to make it match the metal surface. combine.

Embodiment 3

[0033] By weight, the composition of the composite material is: 15% SiC, 1.0% Cr, 1.0% Mo, 0.5% Nb, and the total amount of Ti, Ni, Mn, V, Zr, RE, Si or B alloying elements does not exceed 2% , the carbon content in the steel matrix of the composite material is 0.4%, and the balance is Fe; the above-mentioned composite material raw materials are mixed and ball-milled to make powder, and coated on the metal surface, melted by laser heating and mixed with the metal surface binding.

[0034] The guide roller is subjected to strong friction and wear during operation, and its surface must have high wear resistance. SiC is an inexpensive hard phase with a Vickers hardness of 33400MPa. The SiC particles are dispersed in the steel matrix. The steel matrix plays the role of bonding and supporting the SiC particles, and the SiC particles play the role of strengthening, hardening and anti-wear. Such composite materials have high wear resistance. Welding a layer of the composite materia...

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PUM

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Abstract

The present invention is composite SiC guide roller and its making process, and features that the composite SiC guide roller has a steel base body and a surface composite material layer of material comprising SiC 5-40 %, C 0.2-0.6 %, Cr 0-3.0 %, Mo 0-2.0 %, Mn 0-2.0 %, other metal and non-metal elements not more than 5 %, and Fe for the rest. The composite material is coated to the surface of the steel base body with powder, wire or rod of the composite material and through hot spraying, hot spray welding or laser depositing and combined with the steel base body. The composite SiC guide roller of the present invention has high hardness, high wear resistance, low brittleness, capacity of being heat -treated, machinability, low cost, high performance/cost rate and other advantages.

Description

Technical field: [0001] The invention relates to a guide roll of a wire rod profile rolling mill and a preparation method thereof. Background technique: [0002] Guide rollers are the key parts and main consumables of wire, rod and profile forming equipment, and their market demand is huge. At present, the guide rollers used at home and abroad mainly include high-chromium cast iron, high-chromium cast steel, nickel-chromium chilled cast iron, Cr12MoV steel, high-speed steel and cemented carbide. The first few types of guide rollers have low cost, but short service life; high-speed steel guide rollers have serious segregation, and eutectic carbides are easily distributed in a network, which is brittle and easy to break; cemented carbide has a long service life, but is expensive and not cost-effective . There are also methods of surface coating alloys or composite materials at home and abroad, but the coated composite materials are usually expensive composite materials such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B39/14B65H51/04B65G39/02F16C13/00B32B15/04C23C4/04B23K26/34
Inventor 杜晓东
Owner HEFEI UNIV OF TECH
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