High temperature, wear-resistant and anti-noclulation for roller coating and spray coating to inside of furnace

Abstract

The high temperature wear-proof nodulation-resisting furnace roller spraying material consists of MCrAlY 65-85 wt%, and mixture of oxide and boride 15-35 wt%. MCrAlY consists of M, which is at least one of Ni, Co, Ni-Co alloy and Fe, 76-88.9%, Al 3-8%, Cr 8-15% and Y 0.1-1%. In the roller spraying material, boride accounts for 5-15% and oxide 10-20%. The roller spraying material has high temperature wear resistance similar to oxide ceramic material, high temperature nodulation resistance one boride, the advantages of MCrAlY coating and stable use temperature up to 950deg.C.

Description

technical field [0001] The invention relates to a furnace roll spraying material, in particular to the spray coating on the surface of a furnace roll for transferring steel plates in a continuous steel annealing furnace, so that the surface roughness of the furnace roll can be kept constant for a long time without nodules on the surface of the furnace roll. Background technique [0002] In the steel plate continuous annealing unit, the furnace rollers in the furnace play the role of supporting and transferring the steel plate. The working temperature of the furnace rollers is 600-1200 ℃, and they are in a reducing atmosphere of nitrogen and hydrogen. Since the furnace roll and the steel plate are in a long-term contact and moving state, the surface of the furnace roll is easy to wear and reduce the roughness of the original furnace roll surface. On the one hand, the transfer effect of the strip is reduced, causing the material on the surface of the steel plate to transfer to...

AI Technical Summary

Problems solved by technology

However, in recent years, in order to improve the productivity of CAL/CGL and adapt to the production of various steel plates, especially to meet the needs of continuous annealing of manganese-containing ultra-low carbon steel plates (IF steel), the furnace temperature of t