Axle sleeve and bush for zinc plating pot roller and its making method

Abstract

The present invention relates to an axle sleeve, an axle bush and a manufacture method used on the zinc pot roller in the continuous hot dip galvanizing production line in steel and metallurgy fields. The method of oxygen-fuel gas spray welding or plasma spray welding or laser melting is adopted, the cobalt-based or cobalt-based wire stock or powder is sprayed or melted on the matching surface of the axle sleeve and the axle bush to form a surface strengthened layer with the thickness of 2 to 5 mm. The axle sleeve and the axle bush manufactured through the method of the present invention greatly enhances the zinc resistance or aluminum zinc corrosion and friction resistance performance, the combination performance is good, the present invention is not easy to break off, and the service life is lengthened. The method can be suitable for preparation of a thick coating layer, and is simple and convenient, the cost is lower, and the utilization cost and the production cost of the enterprise can be directly reduced. The method can be used as the processing method of the parts which are mutually contacted and have opposite motion in the similar zinc or aluminum zinc solution corrosion environment to lengthen the service life.

Description

technical field [0001] The invention relates to a shaft sleeve, a bearing bush and a manufacturing method thereof for a zinc pot roller in a continuous hot-dip galvanizing production line in the field of iron and steel metallurgy. The method can also be used as a processing method for components that are in contact with each other and have relative motion in the corrosive environment of zinc or zinc-aluminum melt to prolong their service life. Background technique [0002] The zinc pot components of the continuous hot-dip galvanizing production line include a sinking roll, two stabilizing rolls, bearings assembled at both ends of these rolls, and support arms for supporting them. All these components are submerged in molten zinc or zinc-aluminum alloys. Liquid zinc pot and serve at a working temperature of around 470°C. The above-mentioned bearing is composed of a shaft sleeve and a bearing bush, and its wear resistance is lower than that of other components. If it is not r...

AI Technical Summary

Problems solved by technology

However, this method is not conducive to the preparation of thick coatings. Due to the influence of deposition efficiency, the waste of raw materials in the spraying process is relatively high.