Ceramic roller for hot rolling steel billet delivery and its preparation method

Abstract

The invention relates to a improved ceramic roller with high mechanical strength, strong impact resistance and well resistance to temperature rapid change for but not only the hot rolled steel plate. Wherein, the roller comprises fused quartz particle of 80~90 shares and base binder of 10~20 shares, has rupture strength P more than 45MPa and expansivity less than 0. 8í‡10-6 / deg C, repeats in water of 1000~30Deg for 15 times without cracking, has surface roughness near 1. 6ª– or much less, and rubs with steel plate for 100 times with compression of 10kg / cm2 not to form rub marks and benefit to ensure the quality of steel surface.

Description

technical field [0001] The present invention relates to the improvement of ceramic conveying rollers, in particular to a ceramic roller with high mechanical strength, strong impact resistance, good temperature resistance and wear resistance, which can be used but not the only one for conveying hot-rolled steel plates. Background technique [0002] In the production of hot-rolled thin plates (such as automobile steel plates) in iron and steel plants, high-temperature (800 ° C ~ 900 ° C) hot steel plates are transferred to the next process, and the rollers are used for translational transmission on the way. Most of the conveying rollers in iron and steel plants now use cast iron rollers. However, when the cast iron rollers convey steel plates, the iron-iron rotation friction is large, which not only causes greater wear of the rollers, short service life, and increases production costs, but also makes the surface of the steel plate easy to produce. Scratches affect the surface ...

AI Technical Summary

Problems solved by technology

Its raw materials are expensive, which not only makes the manufacturing cost very high, but also has no reports on the impact resistance and other properties that can be used for high-quality hot-rolled steel plate transmission

Chinese patent 88103237.9 is used in continuous heating furnaces and hot-coating devices for material conveying ceramic rollers. The ceramic rings are filled with graphite, carbon, metal oxides, and silicon carbide fillers with substantially the same expansion coefficient as the ceramic materials of the roller body to strengthen Mechanical load capacity, but still can only be used at a temperature of 200-500 ℃, and the transmission quality is relatively light, and it cannot be used for the transmission of high-quality and high-quality hot-rolled steel plates.

Furthermore, for the large porcelain roller (∮180-250×1500-2200mm) used for hot steel plate transmission, it is difficult to realize the ordinary grouting