Large granular spherical metal ceramic nano composite spraying powder

Abstract

The invention relates to macro aggregate ball shape metal ceramic nm compounding spray coating powder that contains titanium diboride 50-70wt%, cobalt 10-24wt%, chromium powder 6-13wt%, tungsten boride 5-11%, and the other is rare earth powder. Mixing the powder according to the ratio, wet method ball milling, centrifuging, pressure spraying graining, vacuum heat treatment technology and grain classifying process, the 20-45um and 45-75um granularity of powder would be gained. It has good abrasion resistant, high temperature resistant and corrosion resistance capability.

Description

technical field [0001] The invention relates to a spraying powder in the technical field of materials, in particular to a large-particle spherical metal ceramic nanocomposite spraying powder. Background technique [0002] As the key process components of the hot-dip galvanizing unit, the service life of the sinking roll and the stabilizing roll of the galvanizing sinking roll system has been very short for a long time due to the corrosion of the molten aluminum-zinc alloy. Especially with the increase of the aluminum content in the zinc alloy, the service temperature of the alloy liquid rises thereupon, thereby causing the service life of the galvanized roller to be shortened sharply. With the continuous emergence of new galvanized coatings, the demand for 55% Al galvanized liquid is rising. This coating puts forward higher requirements for the use temperature of the molten solution, that is, 600 degrees. Therefore, higher requirements are put forward for the performance of...

AI Technical Summary

Problems solved by technology

However, mass production shows that the service life of the Co-WC coated sinking roll and stabilizing roll system cannot reach 5 days, which seriously affects the normal production and increases the operating cost and maintenance cost.