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 low cost performance, short service life, low cost of guide rollers, etc., and achieve rich raw materials and improve wear resistance. , the effect of low cost

Inactive Publication Date: 2008-09-17
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] In terms of weight percentage, 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 alloy 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 Ф5mm wire rod, which is coated on the metal surface by arc thermal spraying to make it bond with the metal surface.

Embodiment 2

[0031] In terms of weight percentage, 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 alloy 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 a powder, and the method of plasma spraying is applied to the metal surface to make it compatible with the metal surface combined.

Embodiment 3

[0033] In terms of weight percentage, the composition of the composite material is: 15% SiC, 1.0% Cr, 10% Mo, 0.5% Nb, and the total amount of Ti, Ni, Mn, V, Zr, RE, Si or B alloy 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, heated by laser to melt and combine with the metal surface binding.

[0034] The guide roller is subject to strong friction and wear during work, requiring its surface to have high wear resistance. SiC is a cheap hard phase with a Vickers hardness of 33400MPa. SiC particles are dispersed in the steel matrix. The steel matrix plays the role of bonding SiC particles and supporting them. SiC particles play the role of strengthening, hardening and anti-wear. This type of composite material has high wear resistance. Depositing a layer of the composite m...

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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 bar profile rolling mill and a preparation method thereof. Background technique: [0002] Guide roller is a key part and main consumable part of wire, rod and profile forming equipment, and its market demand is very large. 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 hard alloy. 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 . 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 as WC-steel com...

Claims

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Application Information

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Patent Type & Authority Patents(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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