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Ultrasonic method and device for testing macroscopic cleanness of continuous casting billet

A detection device and detection method technology, which are applied in measurement devices, analysis of solids using sonic/ultrasonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, etc. It can reduce the interference of the sample surface, improve the signal-to-noise ratio, and achieve the effect of fast non-destructive testing.

Active Publication Date: 2009-06-03
BAOSHAN IRON & STEEL CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] It can be seen that although the metallographic method can check the inclusions in steel, it cannot meet the comprehensive and rapid inspection requirements for the detection of inclusions in steel (macro cleanliness), which is urgently needed in modern steel production. It is very incomplete, incomplete, and unrepresentative, and cannot detect the overall inclusions (macro cleanliness) of the steel
[0005] Ultrasonic has been used in the field of industrial testing for a long time, and it is widely used in various industries such as medical treatment, imaging, construction, electric power, etc. There are many related flaw detection standards for ultrasonic testing, but most of these standards and technologies are aimed at macroscopic flaw detection Applied, in recent years, driven by the electronics, information and other industries, ultrasonic testing is developing rapidly, but it is still a relatively new work in the application field of using ultrasonic testing to detect micro-sized defects
Especially in the aspect of using the non-destructive testing method to check the inclusion (slag) defects inside the steel, there is no published technology or patent

Method used

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  • Ultrasonic method and device for testing macroscopic cleanness of continuous casting billet
  • Ultrasonic method and device for testing macroscopic cleanness of continuous casting billet
  • Ultrasonic method and device for testing macroscopic cleanness of continuous casting billet

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Embodiment Construction

[0048] see figure 1 , the composition of the continuous casting slab macro cleanliness ultrasonic detection system, which includes a water-immersed continuous casting slab cleanliness detection device with a high-frequency focused ultrasonic probe, a pulse ultrasonic signal transmitting / receiving processor, a data acquisition card, and a continuous casting slab macroscopic Cleanliness Analyzer.

[0049] see you again figure 2 , image 3 , the continuous casting slab macro-cleanliness ultrasonic detection device of the present invention, it comprises, base 24, its bottom is provided with horizontal adjustment screw 25; Fixed frame 19, is positioned on base 24, comprises upper beam, fixed support; Two-dimensional arc pendulum 22, set on the base 24 and inside the fixed frame 19, the θ of the two-dimensional arc swing table 22 X and θ Y Stepper motors 20 and 21 with adjustment knobs are installed on one end of the direction; the water tank 17 is fixed on the two-dimensional ...

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Abstract

A ultrasonic detection method of macrocleanness on continuous casting billet includes using multiple resolution analysis means to carry out analysis on original ultrasonic echo signal series at different frequency scope and carrying out treatment on analysis said echo signal with reasonable time frequency analysis, reconfigurating treated signal to generate signal with the same length as said echo signal series, comparing treated signal with defect judgment standard used at production unit to form planar distribution drawing of slag as per sample surface distribution.

Description

technical field [0001] The invention belongs to the field of non-destructive testing (NDT) of metallurgical materials, and relates to a method for inspecting inclusions (slag) inside continuous casting slabs by using ultrasonic waves. Background technique [0002] Improving the comprehensive performance of steel through "ultra-pure, ultra-uniform, and ultra-fine" is a common process method, but there are many factors that will affect the purity of steel, such as slag rolling and continuous casting bias, which in turn affect the quality of steel. Inclusions (slag) are substances that directly affect the purity of steel and have a great impact on the performance of steel. It is very important to control the content of inclusions (slag). Generally speaking, the purity of steel mainly depends on the impurity content in steel, the size of inclusions in steel, the distribution of inclusions, and the type of inclusions in steel. There is no effective means to detect the macro clea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/06G01N29/04G01N29/24G01N29/44
Inventor 张国星林伟军胡会军吴楠李小兵张海澜华云松
Owner BAOSHAN IRON & STEEL CO LTD
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