Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ultrasonic Testing Method for Butt Welding Joints of Austenitic Stainless Steel

A technology of austenitic stainless steel and welded joints, which is applied in the direction of using sonic/ultrasonic/infrasonic waves to analyze solids, reduce greenhouse gases, instruments, etc., and can solve the problems of influence judgment and repair, large loss of sound energy, large deviation of quantitative positioning of defects, etc.

Active Publication Date: 2022-06-03
CHINA NAT CHEM ENG THIRD CONSTR +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Austenitic stainless steel welds have coarse grains, columnar grains and anisotropy, which produce strong absorption and scattering of ultrasonic waves, resulting in large loss of sound energy, many grass-like echoes, and large deviations in quantitative defect positioning, which seriously affect the determination and accuracy of defects. rework
[0003] With the application of austenitic stainless steel in the petrochemical, pharmaceutical, and aerospace fields more and more widely, in order to be able to realize ultrasonic testing in austenitic stainless steel welds, it is necessary to take special technical measures and carry out experimental verification. However, there are few such techniques to detect weld defects

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ultrasonic Testing Method for Butt Welding Joints of Austenitic Stainless Steel
  • Ultrasonic Testing Method for Butt Welding Joints of Austenitic Stainless Steel
  • Ultrasonic Testing Method for Butt Welding Joints of Austenitic Stainless Steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] like Figure 1-10 As shown, the ultrasonic testing method for austenitic stainless steel butt welded joints includes the following steps:

[0041] Step S1, customizing probes: customize several dual-crystal focusing longitudinal wave oblique probes according to requirements. The probe data is as shown in the table below. According to actual needs, 2P8×10K1, K2, 2P6×6K1, K2 longitudinal wave oblique probes can be used for supplementary scanning;

[0042] serial number angle of refraction Nominal Frequency (MHz) Depth of focus (mm) wafer size 1 70° 1.5、2.0、2.5 20 8×12mm 2 60° 1.5、2.0、2.5 20 8×12mm 3 45° 1.5、2.0、2.5 20 10×12mm 4 45° 1.5、2.0、2.5 40 10×12mm

[0043] Step S2, making a test block:

[0044] 1) Use the same specifications and materials as the tested specimens to make a special comparative test block for austenitic pipeline weld inspection, and the comparative test blocks include A-type comparative test b...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an ultrasonic testing method for austenitic stainless steel butt welded joints, comprising the following steps: step S1, ordering a probe; step S2, making a test block; step S3, making a distance-amplitude curve; step S4, preparing for detection; Step S5, detection; Step S6, defect assessment. The ultrasonic testing method of the austenitic stainless steel butt welded joint, after comparative testing of the defective parts, the Ir-192 source ray testing and on-site actual dissection are respectively carried out on the austenitic stainless steel weld seam, and the test results are compared with the radiographic film and dissection The results are completely consistent, which proves that this method can effectively conduct ultrasonic testing on austenitic stainless steel welds, and effective ultrasonic testing of this type of welded joints can reach the standard of non-destructive testing. For the testing of this industry in this field It has certain reference significance.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic testing of austenitic stainless steel butt welded joints, and particularly relates to an ultrasonic testing method of austenitic stainless steel butt welded joints. Background technique [0002] Austenitic stainless steel welds have coarse grains, columnar grains and anisotropy, which produce strong absorption and scattering of ultrasonic waves, large loss of sound energy, many grass-like echoes, and large deviations in the quantitative positioning of defects, which seriously affect the determination and evaluation of defects. Repair. [0003] As austenitic stainless steel is more and more widely used in petrochemical, pharmaceutical and aerospace fields, in order to achieve ultrasonic testing in austenitic stainless steel welds, it is necessary to take special technical measures and carry out experimental verification. However, there is currently very little method to detect weld defects with...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/11
CPCG01N29/11G01N2291/0289G01N2291/2675Y02E30/30
Inventor 孙树楠严恒静纪禄
Owner CHINA NAT CHEM ENG THIRD CONSTR
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com