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Evaluation method for directly obtaining edge recarburization of continuous casting billet

An evaluation method and technology of continuous casting slabs, which are applied in the preparation of test samples, measuring devices, and material analysis through optical means, can solve the problems of low detection accuracy and complicated detection methods, and achieve high detection accuracy and improved Accuracy and comprehensiveness, the effect of ensuring precision

Pending Publication Date: 2021-12-03
SGIS SONGSHAN CO LTD
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Problems solved by technology

However, this method requires multiple analytical methods such as low-magnification inspection and chemical analysis, and the detection method is complicated and the detection accuracy is not high.

Method used

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  • Evaluation method for directly obtaining edge recarburization of continuous casting billet
  • Evaluation method for directly obtaining edge recarburization of continuous casting billet
  • Evaluation method for directly obtaining edge recarburization of continuous casting billet

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Embodiment Construction

[0033] The steps of the evaluation method for directly obtaining the carburization of the edge of the continuous casting slab in the embodiment of the present application will be described in detail below.

[0034] An evaluation method for directly obtaining the carburization of the edge of the continuous casting slab, comprising the following steps:

[0035] 1) Sample preparation:

[0036] Select a 160mm continuous casting billet of 45 steel, take a 10mm thick transverse sample from the continuous casting billet, divide it into 4 pieces of 20mm*20mm, 12 pieces of 40mm*20mm small samples, and number the samples in sequence (4 pieces of 20mm *20mm numbers are 1, 5, 9, 13, and other numbers are 40mm*20mm small samples, numbers 1-5 correspond to the inner arc of the billet; numbers 9-13 correspond to the outer arc of the billet), a total of 16 block, and correspond to the position of the slab (inner and outer arcs), such as figure 1 Shown; The ratio of the sampling area of ​​th...

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Abstract

The invention discloses an evaluation method for edge recarburization of a continuous casting billet based on a metallographic method, and belongs to the technical field of metal detection. The method comprises the following steps: performing analyzing by using a metallographic microscope to obtain pearlite contents X in different areas of a standard sample of the metallographic sample; obtaining the carbon segregation index Y = C < measurement > / C of the sample by using an electronic probe or an in-situ analyzer; using smelting pearlite contents in different analysis areas of each metallographic sample standard sample and a corresponding carbon segregation index P = C < measurement > / C to form a data set, and establishing a relationship characterization formula Y = a * X + b of the pearlite content X and the carbon segregation index Y, a and b being correction coefficients; taking a metallographic sample from an edge area of a continuous casting square billet, obtaining the pearlite content X1 of a carbon segregation analysis area of the metallographic sample through a metallographic microscope, and substituting the pearlite content X1 into a relation characterization formula of the pearlite content X and the carbon segregation index Y to directly obtain the carbon segregation index Y1. The method can realize rapid output of the detection result, objectively reflects the segregation condition, and is high in detection precision and easy to operate in the detection process.

Description

technical field [0001] The present application relates to the technical field of metal detection, and in particular, relates to an evaluation method for directly obtaining the carburization of the edges of continuous casting slabs. Background technique [0002] The 45 steel wire rod produced by the existing production method generally has edge carburization, and local pearlite segregation occurs at the edge carburization, which seriously affects the processing and use of customers. It caused serious losses to customers, and even caused the loss of downstream users, which affected the quality stability and reputation of products. In order to analyze whether the carburization is produced by the slab itself or the heating process, an evaluation method for evaluating the carburization of the edge of the continuous casting billet was invented, which provides a basis for studying the cause of the carburization of the edge of the slab and improving the carburization of the edge of ...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N23/2202G01N23/2251G01N33/2022G01N1/32
CPCG01N21/84G01N23/2251G01N33/2022G01N1/32G01N23/2202
Inventor 雷中钰韦乾永农之江杨明梅胡娟陈远生李祥龙郭峻宇刘春林朱祥睿李富强
Owner SGIS SONGSHAN CO LTD
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