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

A technology of detection device and detection method, which is applied to measurement devices, analysis of solids using sonic/ultrasonic/infrasonic waves, and material analysis using sonic/ultrasonic/infrasonic waves, etc. It can solve problems such as detection of material conditions, so as to achieve the effect of rapid non-destructive testing, improve signal-to-noise ratio, and reduce interference on sample surface.

Active Publication Date: 2007-05-09
BAOSHAN IRON & STEEL CO LTD +1
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  • Abstract
  • Description
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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] Referring to Figure 1, the composition of the ultrasonic testing system for macroscopic cleanliness of continuous casting slabs includes a water-immersed continuous casting slab cleanliness testing device with a high-frequency focused ultrasonic probe, a pulsed ultrasonic signal transmitter / receiver processor, a data acquisition card, a Slab macro cleanliness analyzer.

[0049] Referring to Fig. 2 and Fig. 3 again, the ultrasonic testing device for the macroscopic cleanliness of continuous casting slabs of the present invention includes a base 24, the bottom of which is provided with a horizontal adjustment screw 25; a fixed frame 19, located on the base 24, includes an upper beam 191 , the fixed bracket 192; the two-dimensional arc pendulum table 22, which is arranged on the base 24, in the fixed frame 19, the θ of the two-dimensional arc pendulum table 22 X and one end in the θY direction are installed with stepper motors 20 and 21 with adjustment knobs; a water tank ...

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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 a continuous casting slab by using ultrasonic waves. Background technique [0002] It is a common process to improve the comprehensive properties of steel through "ultra-purity, ultra-uniformity, and ultra-refinement", but there are many factors that will affect the purity of steel, such as slag coiling, continuous casting bias flow, and then affect the quality of steel. Inclusions (slag) are substances that directly affect the purity of steel and have a great impact on the properties of steel. It is very important to control the content of inclusions (slag). Generally speaking, the purity of steel mainly depends on the content of impurities in the steel, the size of the inclusions in the steel, the distribution of the inclusions, and the type of inclusions in the steel. There is no effective m...

Claims

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Application Information

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Patent Type & Authority Applications(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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