Macroscopic examination method of high-manganese high-titanium microalloying steel casting slab

Abstract

The invention provides a macroscopic examination method of a high-manganese high-titanium microalloying steel casting slab applied to the technical field of steelmaking and continuous casting slabs. The macroscopic examination method of the high-manganese high-titanium microalloying steel casting slab comprises the examination steps that after the slab is out of a fan section, the slab is stackedoffline and cooled to normal temperature; a slab macroscopic sample is cut, the milling machine machining thickness of the examination surface of the slab macroscopic sample is controlled, and the roughness of the examination surface of the slab macroscopic sample is controlled; industrial hydrochloric acid with water are matched to form an acid solution, the acid solution is added to a pickling tank and heated; the slab macroscopic sample is put into the pickling tank for erosion, the examination surface of the slab macroscopic sample is cleaned with alkaline water, and the examination surface of the slab macroscopic sample is blown dry; and the slab macroscopic sample is rated, and the rating result is obtained. According to the macroscopic examination method of the high-manganese high-titanium microalloying steel casting slab, the rating result of the slab macroscopic sample can truly reflect the original slab quality of a continuous casting slab, and basic data are provided for theoptimization of a continuous casting technology and the research on the relationship with the quality of a rolled material.

Description

technical field

[0001] The invention belongs to the technical field of steelmaking and continuous casting slabs, and more specifically relates to a low-magnification inspection method for high manganese and high titanium microalloyed steel slabs. Background technique

[0002] The microalloying of steel is a high-tech in the field of materials and metallurgy. It is to add trace amounts of carbides such as niobium (Nb), vanadium (V), titanium (Ti) and boron (B) to C-Mn steel, Nitride, the forming elements are alloyed and the molten steel is degassed, desulfurized, and the shape of inclusions is controlled during the steelmaking process, and the controlled rolling / controlled cooling process is adopted in the hot rolling process, so as to achieve A physical metallurgical process that controls grain refinement and precipitation strengthening of carbides and nitrides in steel. At present, when iron and steel enterprises produce titanium, high manganese and high titanium microallo...

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