WC composite guide roller and manufacturing method thereof

Abstract

The invention discloses a WC composite guide roller and a manufacturing method thereof. A composite layer is arranged on the surface of matrix steel of the composite guide roller. The WC composite guide roller is characterized in that the matrix steel is carbon steel or alloy steel containing 0.2-0.7 percent by weight of carbon; the composite layer comprises the following material components in percentage by weight: 10-50 percent of WC, 0.2-0.8 percent of C, 0-3.0 percent of Cr, 0-2.0 percent of Mo, 0-2.0 percent of Mn, 0.11-0.5 percent of RE, not more than 5 percent of other metallic and non-metallic elements and the balance of Fe. The manufacturing method of the WC composite guide roller comprises the following steps of: coating composite powder on the surface of the matrix steel by using an plasma coating method and enabling the composite powder to be remelted together with the matrix steel by using an argon arc remelting method so as to form the composite layer on the surface of the matrix steel; or directly spraying the composite powder on the surface of the matrix steel and enabling the composite powder to be remelted together with the matrix steel by using the argon arc remelting method. The composite guide roller has high rigidity, good abrasion resistance, low fragility, capability of thermal treatment and mechanical machining, low cost and high cost performance.

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 alloy or composite materials at home and abroad, but the coated composite materials are usually expensive composite materials such as WC-Co composite...

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

There are also methods of surface coating alloy or composite materials at home and abroad, but the coated composite materials are usually expensive composite materials such as WC-Co composite materials, WC-Ni composite materials, TiC-Ti composite materials, and cannot be heat treated. Significantly improve the structure and performance of the cladding layer, the coating process adopts a single spraying process or laser cladding process, or vacuum sintering process

The coating process adopts a single spraying process and can only form a mechanical bond with the steel substrate; the laser cladding is high in cost and the cladding layer is shallow; although the vacuum fusion cladding process can form a metallurgical bond, the cladding is expensive and low Melting point Ni-based alloy, high cost, complex process, limited performance improvement