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Nondestructive testing method for residual stress on surface of large roller

A roll surface, residual stress technology, applied in the field of non-destructive testing

Active Publication Date: 2012-12-19
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that there is no good method in the prior art to realize the defect of nondestructive testing of residual stress on the surface of large rolls by ray stress diffractometer, and a method for nondestructive testing of residual stress on the surface of large rolls is provided, so that large Roll surface residual stress test can not damage the roll

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  • Nondestructive testing method for residual stress on surface of large roller
  • Nondestructive testing method for residual stress on surface of large roller

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Embodiment Construction

[0020] see figure 1 with figure 2 , as can be seen from the figure, a kind of non-destructive testing method of residual stress on the surface of a large roll of the present invention, it comprises a ray stress diffractometer 5 and a goniometric head 6 during testing:

[0021] One group (2 pieces) of magnetic block 1 is placed on the top of roll 4 earlier, and the arc surface of magnet 1 bottom surface and roll 4 is bonded, and described magnetic block 1 preferably has the permanent magnet of electromagnetic coil, uses electric control device Fix the magnet 1 on the roll, and fix the ray meter base plate 2 and the electromagnetic device, so that a test platform is formed on the arc-shaped top of the roll 4, and the X-ray stress diffractometer 5 and the angle measuring head 6 are fixed by bolts. The test device can be easily placed on the test platform to measure the residual stress and retained austenite on the surface of the roll 4.

[0022] The bottom surface of the magne...

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Abstract

The invention relates to a nondestructive testing method, in particular to a nondestructive testing method for a large roller. In the nondestructive testing method for residual stress on the surface of a large roller, a ray stress diffractometer and an angle measuring nose are included. The method comprises the following steps of: arranging a group of special electromagnetic permanent control devices on the top of the roll surface of the roller; fixing the angle measuring nose of the ray stress diffractometer on the group of electromagnetic permanent control devices; and testing the residual stress on the surface of the roller by using the ray stress diffractometer. The invention can test the residual stress on the surface of the roller for the workpiece of the large cold roller, meet therequirement of the nondestructive test of the large roller and achieve tracking test for the finished product roller or the roller in use.

Description

technical field [0001] The invention relates to a nondestructive testing method, in particular to a nondestructive testing method for large rolls. Background technique [0002] The residual stress measurement methods at home and abroad can be divided into two categories: mechanical measurement methods and physical measurement methods, among which the development of blind hole method (mechanical measurement method) and x-ray diffraction method (physical measurement method) is relatively mature. The blind hole method is a destructive test, which can be operated on-site, with fast measurement speed and relatively accurate results, and does not require high measurement conditions. The measurement of surface residual stress has high requirements on the surface to be measured, and it is required to avoid the interference caused by the local deformation of the surface. However, this method is currently the only non-destructive and convenient technology for testing residual stress ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/18
Inventor 贺强庞征
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE