Determination method for center density of continuous casting slab

Abstract

The invention belongs to the field of property detection for metal materials and specifically relates to a determination method for center density of a continuous casting slab. The determination method for the center density of the continuous casting slab provided by the invention comprises the following steps: a) taking samples A and B in same size respectively from a corner, 9-11mm away from the inferior part on the two sides, of a cross section of the continuous casting slab and from the center of the cross section; b) processing the surfaces of the samples A and B, cleaning and testing the density rho0 of the sample A and the mass mB of the sample B; c) performing wax-sealing on the sample B and testing the volume V of the sample B after being wax-sealed; d) substituting the acquired rho0, mB and v into the formula (I) and determining the central porosity of the continuous casting slab; and e) substituting the acquired theta into the formula (II), thereby determining the center density (D=1-theta) of the continuous casting slab. The method provided by the invention is free from interference caused by human factors; according to the method, the condition of the center density of the continuous casting slab can be quickly and accurately reflected; an accurate, effective and reasonable determination method for the center density of the continuous casting slab is supplied for the continuous casting technique.

Description

Technical field [0001] The invention belongs to the field of metal material performance detection, and specifically relates to a method for measuring the central density of a continuous casting slab. Background technique [0002] In the past 20 years, the progress of continuous casting production and continuous casting technology in my country has promoted the development of the entire steel industry. As one of the signs of the level of the steel industry, continuous casting technology has become the main technical driving force for the development of steel production. With the improvement of production capacity and the richness of market demand, the quality of casting billet has become more and more important. The quality inspection of continuous casting slab is one of the key methods of continuous casting production quality assurance. [0003] The central density of continuous casting slab (including central porosity and central shrinkage cavity, etc.) is an important defect th...

AI Technical Summary

Problems solved by technology

This invention belongs to the application of traditional low-magnification inspection in the quality inspection of casting slabs. The inspection period is relatively long, and the influence of human factors is relatively large. There is no strict quantitative standard for the internal density of casting slabs.

[0008] In summary, at present, there is no standard quantitative analysis method for the detection of the central density or porosity of continuous casting slabs. Most of the cases are obtained by artificial qualitative analysis, and there are serious errors. A standard quantitative analysis method, which can quickly and accurately reflect the density of the center of the slab, is very necessary to provide an accurate and effective theoretical basis for the continuous casting process

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