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Ultrasonic inspection technology of large-size austenitic stainless steel forge pieces and application of ultrasonic inspection technology

An austenitic stainless steel and ultrasonic technology, which is applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, and can solve problems such as changes in ultrasonic sound speed and propagation direction, noise submersion, and signal-to-noise ratio decline.

Inactive Publication Date: 2016-07-27
SHENYANG BLOWER WORKS GRP NUCLEAR PUMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The scattering and attenuation of ultrasonic waves on the grain boundaries of austenite coarse-grained structures will cause forest echoes, which will reduce the signal-to-noise ratio. Coupled with the size, the ultrasonic penetration ability will be significantly reduced, and the noise will drown the defect waves in severe cases; The anisotropy of the austenite structure will change the sound velocity and propagation direction of the ultrasonic waves, resulting in misjudgment
At present, there is no report on the ultrasonic flaw detection technology for large austenitic stainless steel forgings with a cross-sectional thickness of 600mm. How to control the quality of products through inspection is an important means for the wide application of large austenitic stainless steel forgings in nuclear power and petrochemical fields.

Method used

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  • Ultrasonic inspection technology of large-size austenitic stainless steel forge pieces and application of ultrasonic inspection technology
  • Ultrasonic inspection technology of large-size austenitic stainless steel forge pieces and application of ultrasonic inspection technology
  • Ultrasonic inspection technology of large-size austenitic stainless steel forge pieces and application of ultrasonic inspection technology

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Embodiment 1

[0059] This embodiment is a non-destructive testing of an austenitic stainless steel forging (austenitic stainless steel forging ASMESA-965F304) for the heat shield of the nuclear primary main pump using ultrasonic flaw detection technology.

[0060] 1. The dimensions of the heat shield forging are as follows: figure 1 As shown, its section thickness is 635mm.

[0061] 2. Qualification of inspectors

[0062] The inspectors shall be those who have obtained Level Ⅱ and Level Ⅲ personnel stipulated in HAF602.

[0063] 3. Ultrasonic instrument

[0064] The pulse type A display flaw detector is adopted, the model is SIUICTS-3020. The specification of the direct wave probe is 2PΦ24, and the specification of the longitudinal wave oblique wave probe is 2M13×136°. The coupling agent used on austenitic stainless steel forgings is produced by Shanghai Xinmeida Flaw Detection Equipment Co., Ltd., brand DJ-10, which is a paste with good sound transmission performance and easy to remove...

Embodiment 2

[0073] The difference from Example 1 is that the 60° V-shaped groove of the F304-V2 oblique wave comparison test block is inspected by using the 2M13×136° angle probe designed by the present invention. The inspection results show that when the probe is at a horizontal linearity of 644mm, The V-groove on the inner wall is detected. The test results are shown in Table 3.

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Abstract

The invention discloses an ultrasonic inspection technology of large-size austenitic stainless steel forge pieces and application of the ultrasonic inspection technology, and belongs to the technical field of nondestructive testing in an equipment manufacturing industry. An ultrasonic inspection procedure of large-size thick-wall austenitic stainless steel forge pieces is formulated through selecting angles and frequency of a longitudinal wave angle probe, selecting a tapered wedge manufacturing material, designing a reference test block and the like; the technology is applied to the large-size austenitic stainless steel forge pieces with the section thickness of more than or equal to 600mm, and particularly can meet quality requirements on the austenitic stainless steel forge pieces of a nuclear power station primary loop.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing in the equipment manufacturing industry, in particular to an ultrasonic flaw detection technology for large austenitic stainless steel forgings and its application. Background technique [0002] The third-generation nuclear main pump designed and manufactured by my country itself, its heat shield parts are manufactured by forging. After forging, the rough machining size is Φ1475 / Φ200×400mm, and the wall thickness in the diameter direction reaches 637mm. [0003] In the primary circuit water system of the nuclear main pump, one end of the heat shield part is in an environment of high temperature, high pressure and radioactive radiation, and the other end is in a normal temperature and non-irradiated water environment to isolate heat and the primary circuit water system. , the role of preventing heat from entering the motor is a key functional component. It is made of ASMESA-965MF3...

Claims

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Application Information

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IPC IPC(8): G01N29/07
Inventor 王冬颖齐兴关锰符伟尚小溪
Owner SHENYANG BLOWER WORKS GRP NUCLEAR PUMP
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