Coating for preventing bearing steel casting blank from being bonded

Abstract

The invention relates to a coating for preventing a bearing steel casting blank from being bonded, which comprises the following powder raw materials in percentage content by weight: 75.5 to 90 percent of MgO, 1 to 5.9 percent of CaO, 1 to 9.5 percent of TiO2, 2 to 10 percent of SiO2, 1 to 8 percent of Al2O3 and 1 to 15 percent of C, wherein the particle sizes of the powder raw materials are all controlled in the range of less than or equal to 0.088 mm; and the coating further comprises water which is 30 to 50 percent of the total weight of the powder raw materials. The invention solves the difficult problem that the bearing steel casting blank cannot be produced in a steel pushing heating furnace due to steel bonding; and guarantee is provided for successfully producing high-quality bearing steel. Meanwhile, the coating can also reduce oxidation burnout rate of the casting blank to at least 50 percent, at least reduces thickness of a decarburized layer to 30 percent, has very important significance and market prospect and can also be widely applied to hot-rolling production of other steel types such as common carbon steel, high-quality carbon steel, alloy steel and the like.

Description

technical field [0001] The invention relates to a paint, in particular to a paint for preventing the bonding of a bearing steel slab. Background technique [0002] In the production of bearing steel, the billet needs to be heated at high temperature for a long time, and the heating temperature even reaches 1200~1260°C. When the bearing steel is heated in a pusher type heating furnace, the problem of steel sticking is easy to occur, and the billet is bonded in the heating furnace and cannot If it is successfully launched, it will disrupt the production order of the entire rolling mill and greatly reduce the production efficiency of the steel mill. At the same time, the bearing steel has been heated at high temperature for a long time, resulting in serious oxidation and burning of the billet, and a thick decarburization layer, which affects the yield and quality of the steel. [0003] Using coating technology can effectively solve the above problems. The basic principle of t...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that when a pusher-type heating furnace heats a bearing steel slab, it is easy to produce sticky steel, resulting in that the slab cannot be smoothly pushed out of the heating furnace, and the surface of the bearing steel slab is seriously oxidized and decarburized. It provides a After the bearing steel slab is coated with the coating of the present invention, it will not produce sticking steel, and it will be pushed out smoothly, reducing the surface oxidation and burning loss rate of the bearing steel slab surface by at least 50%, and can also reduce the thickness of the decarburized layer by at least 30%. coating

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