A process method for preparing WC hard alloy coating by laser cladding on hot-rolled bar skirt plate roller table

Abstract

A process method for preparing WC cemented carbide coating by laser cladding on the skirt plate roller table of hot-rolled bar, which is characterized in that: the weight percentage of spherical cast tungsten carbide is 40‑60%, and the weight percentage of nickel-based alloy is the binder phase 60‑‑40% for preparation and mixing; mechanical processing and surface cleaning of the working layer, oil stains, etc., are removed with solvents or cleaning agents, and the rust layer can be removed by grinding or sandblasting; Spherical cast tungsten carbide powder, adjust the powder feeding rate of the automatic powder feeding device to meet the powder feeding rate required by the coating thickness; use diamond or cubic boron nitride for laser cladding cemented carbide coating to grind to the desired size . The invention adopts laser cladding on the base body to form a heat-resistant and wear-resistant WC hard alloy coating on the hot-rolled skirt roller table made of ordinary 45# steel, so as to improve the service life of the hot-rolled skirt roller table of the bar. Realize laser manufacturing of bar hot-rolled skirt plate roller table.

Description

technical field [0001] The invention relates to a method for repairing metallurgical equipment parts by using laser cladding technology, in particular to a process method for preparing WC hard alloy coating by laser cladding of a skirt plate roller table of a hot-rolled bar, belonging to the technical field of laser cladding. technical background [0002] In the bar rolling production line, the horizontal and inclined arrangements are used in conjunction with the apron, and the roller table that directly transports the bar rolled out of the last rack to the cooling bed is called the apron roller table. After the hot rolled piece passes through, a furrow will be formed on the surface of the roller table; at the same time, the peeling off of the scale will cause abrasive wear on the roller table, forming micro-cutting on the surface. Therefore, the lack of high temperature wear resistance of the roller table during the work process leads to wear grooves as deep as 6-8 mm on th...

AI Technical Summary

Problems solved by technology

Therefore, the lack of high temperature wear resistance of the roller table during the work process leads to wear grooves as deep as 6-8 mm on the surface. Especially when changing the specifications of the rolled material, the wear groove will cause serious quality problems on the steel surface, and the manual on-line Grinding the roller table will bring difficulties in quality management

[0003] The traditional manufacturing methods of apron rollers include high-alloy integral casting or forging, surface arc surfacing, spraying, carburizing (nitrogen) and other technological methods. It is difficult to meet the quality requirements of apron rollers through online production and use.