Multistage sampling and system analyzing method for analyzing nonmetallic inclusions in steels

A non-metallic inclusions, system analysis technology, applied in the field of multi-stage sampling and system analysis method for analyzing non-metallic inclusions in steel, can solve the problem of affecting steel properties, reducing steel mechanical properties and corrosion fatigue limit, reducing steel strength, etc. problems, to achieve the effects of improving production efficiency, improving the development of new steel types, and improving cleanliness

Inactive Publication Date: 2014-03-12
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

Usually inclusions will reduce the strength of the steel and reduce the mechanical properti

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  • Multistage sampling and system analyzing method for analyzing nonmetallic inclusions in steels
  • Multistage sampling and system analyzing method for analyzing nonmetallic inclusions in steels
  • Multistage sampling and system analyzing method for analyzing nonmetallic inclusions in steels

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Embodiment Construction

[0044] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] The present invention is a systematic analysis method for inclusions in steel from multi-stage sampling in the whole process of iron and steel smelting to processing the taken samples, including traditional two-dimensional detection method, non-destructive detection method, non-destructive extraction method of inclusions, inclusion Concentration methods, etc., and listed several sets of application results. The method of systematic analysis of inclusions in steel can comprehensively obtain the information of inclusions in steel, and trace the genetic information of inclusion defects in the final steel product, which has a good guiding effect on the production of clean steel.

[0046] figure 1 It is a schematic diagram of multi-stag...

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Abstract

The invention discloses a multistage sampling and system analyzing method for analyzing nonmetallic inclusions in steels. The method comprises the following steps: samples are taken out from all stations; heat numbers, time, serial numbers and operation parameters are clearly marked on the samples; the system analyzing method is to adopt the system analysis for detecting the inclusions in the steel samples in every smelting process, and comprises a direct detecting method and an indirect detecting method; the inclusions are analyzed and extracted to obtain data information of morphology, size, distribution and components; the obtained data is calculated to obtain the distribution of the inclusions in each procedure; finally, the average summation of the data is implemented to obtain inclusion evolvement rules. The method can master and know the formation, evolvement and molding of the inclusions from the beginnings, masters the defects of the production process to find out measures and methods for improving the process, and records the smelting data and the inclusion change data in the production process; the history data can improve the productivity and guarantee stable product quality of production enterprises.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and relates to sampling in the iron and steel smelting process and analysis and detection of inclusions in steel. It can comprehensively obtain information on inclusions in steel, track the genetic information of inclusion defects in steel final products, systematically and comprehensively evaluate clean steel (clean steel), and guide the production of clean steel. Background technique [0002] The International Iron and Steel Institute (IISI) has given a definition for clean steel: when the non-metallic inclusions in the steel directly or indirectly affect the production performance or performance of the product, the steel is not clean steel; and if the non-metallic inclusions The amount, size or distribution of the steel has no effect on the performance of the product, then the steel can be considered clean steel. [0003] In the 30 years after the first oil crisis in 1973, the...

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Application Information

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IPC IPC(8): G01N33/20
Inventor 张立峰蔡开科张学伟杨文罗艳刘洋李菲
Owner UNIV OF SCI & TECH BEIJING
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