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Ultrasonic detection method for cast BD roller

A detection method and ultrasonic technology, applied in the field of iron and steel forging, can solve the problems of blind spots and inability to detect rolls with full axial ultrasonic waves, and achieve the effect of avoiding blind spots.

Pending Publication Date: 2017-01-04
JIANGSU GONGCHANG ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For cast BD rolls, because the risers of the rolls are connected to the top of the rolls in the early stage of processing, it is impossible to perform ultrasonic testing on the full axis of the rolls
Due to the limitation of the hole type, there is a certain blind area during ultrasonic testing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Select a qualified ultrasonic flaw detector such as USM-GO. Probes required for radial detection of rolls: 1MHZ single crystal straight probe, specification Ф34mm; turn on the dual crystal mode of the ultrasonic flaw detector, connect two 1MHZ single crystal straight probes with two single crystal wires; adjust the range to be greater than the specified The diameter of the roll needs to be measured, and the double probes move in a parallel direction. One of the two probes transmits signals and the other receives signals. If the flaw detector has no normal bottom wave reflection, it indicates that there are crack defects inside. This method can also find the location of the problem section conveniently and quickly when the end-surface wave of the omni-axial detection cannot penetrate.

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PUM

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Abstract

The invention discloses an ultrasonic detection method for a cast BD roller. The ultrasonic detection method includes the following steps that an ultrasonic flaw detector is selected, and probes required during radial detection of the roller are prepared, wherein the probes are 1-MHZ single crystal straight probes, and the specification is phi 34 mm; the ultrasonic flaw detector is started to be in the bicrystal mode, and two single crystal wires are connected with the two 1-MHZ single crystal straight probes respectively; the range is adjusted to be larger than the diameter of the roller required to be measured, the two probes are moved in the parallel direction, one of the two probes is used for signal emission, the other probe is used for receiving, and if normal bottom wave reflection of the ultrasonic flaw detector does not exist, it is indicated that crack defects exist inside the corresponding portion. Compared with the traditional technology, the dead zone of ultrasonic detection is completely avoided with the dual-probe detection method.

Description

technical field [0001] The invention belongs to the field of iron and steel forging, and in particular relates to an ultrasonic detection method of a casting BD roll. Background technique [0002] For cast BD rolls, because the risers of the rolls are connected to it in the early stage of processing, it is impossible to perform ultrasonic testing on the full axis of the rolls. Due to the limitation of the hole type, there is a certain blind area during ultrasonic testing. Contents of the invention [0003] Purpose of the invention: The purpose of the present invention is to provide an ultrasonic testing method for cast BD rolls in view of the deficiencies in the prior art. [0004] Technical solution: In order to achieve the purpose of the above invention, the present invention is specifically implemented in the following way: an ultrasonic detection method for cast BD rolls, comprising the following steps: [0005] (1) Select the ultrasonic flaw detector and prepare the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
CPCG01N29/048G01N2291/0234
Inventor 徐进奚国仙邵黎军史焕青冯喜锋
Owner JIANGSU GONGCHANG ROLL