Method for evaluating anti-stripping performance of refractory material for silicon deoxidized steel in using process

Abstract

The invention discloses a method for evaluating the anti-stripping performance of a refractory material for silicon deoxidized steel in the using process, and belongs to the field of ferrous metallurgy. The method is characterized in that a refractory material to be evaluated is used for smelting high-carbon silicon deoxidized steel. The method comprises the following steps: firstly, realizing lowmelting point of endogenous inclusions in the high-carbon silicon deoxidized steel through a refining process; carrying out plastic deformation on the endogenous inclusions by utilizing a high-temperature rolling process; secondly, controlling the final strength of the wire rod to be 1250 MPa or above by controlling the steel rolling process; wherein the diameter of the wire rod is 10-21 mm, immediately sampling and stretching the wire rod after the wire rod is discharged from a production line, the number of stretching samples being not less than 15, and analyzing and counting the fracture proportion caused by inclusion of corundum, magnesium aluminate spinel, zirconium oxide, forsterite and magnesium oxide by using a scanning electron microscope after stretching. The method can effectively evaluate the anti-stripping performance of the refractory material for deoxidized steel in the use process.

Description

Technical field [0001] The invention belongs to the field of iron and steel metallurgy and relates to a method for evaluating the anti-stripping performance of refractory materials for silicon deoxidized steel during use. Background technique [0002] Metal silicon deoxidation is widely used in the refining of steel for bead wire, steel for cord, automobile suspension spring and steel for cutting wire. Studies have shown that non-metallic inclusions in steel can significantly reduce the processing performance and use performance of silicon deoxidized steel. Controlling non-metallic inclusions in steel is one of the main tasks of steelmaking. Refractory materials for steelmaking (including ladle refractory materials, tundish refractory materials, and ladle nozzles, stoppers and immersion nozzles, etc.) are one of the main sources of large-sized inclusions in steel. There are two main ways in which refractory materials affect the cleanliness of molten steel. One is chemical action...

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Problems solved by technology

For example, in "Study on Foreign Inclusions in Rotary Bending Fatigue Fracture of Silicon Deoxidized Spring Steel 55SiCr", through the method of rotating bending fatigue test, large-scale oxide inclusions can be found on the fracture, but this method has cumbersome test process and long test period. (weeks or even months) etc.

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