不锈钢超声探伤手册 英文资料.pdf

CONTENTS
LIST OF WORKINGィ ROUP MEMBE月S
FOREWORD
General
2
infroduction
Scope and Application
2.2
Particular Problems Involved in the Examination o
Austenitic Welds
Principle of the Method
Conditions to be Established prior to the Examination
Personnel
Required Information about the Welds
Welding samples available
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3.2.2
Absence of weld samples
3.3
Surface Preparation and Marking
3,4
Condition of the Parent Metal
3.5
Agreements Before the Start of the Examination
Extent of the examination
3.5.2 Sensitivity required
3.5
Special conditions
3.5.4 Regular check of equipmen
3.5.5 Reporting
3.6
Visual Inspection
3.7
Surface Preparation
3.8
Couplants
Ultrasonic Propagation Behavior
9
Structure of Austenitic Welds
4.2
1.2.1U
Effects of Austenitic Structures on Ultrasound Propagation
Utrasound propagation in an anisotropic structure
4.2. 1 1 Variation of velocity
4.2.1.2 Beam direction
4.2.1.3 Beam deformation
4. 2.1.4 Effect of the weld fusion faces
4. 2.1.4.1 Reflect
4. 2.1.4.2 Refraction
4. 2.14.3 Mode conversion
4.2.1.4. 4 Interaction with defects
4.2.2 Attenuation in weld meta
4.2.3
influence of weld metal on pulse characteristics
3.1 Pulse spectru
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4.2.3.2
Influence of attenuation of the ultrasonic pulse
2.3.3 Scattered ultrasound
Practical implications for uitrasonic testing on austenitic welds 18
4.2.4.
Defect location
4.2.4.2 Amplitude assessment
Description of Equipment
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introduction
Flaw Detector, Cables and Matching
5.3
Angled Longitudinal Wave Probes
9
5.3
Introduction
5.3.2 General properties
③
5.3.3 Single crystal probes
20
3.4 Twin crystal probes
3
Surface wave probes
22
5.3.6
cussing probes
Calibration and Characterization
4
b
Introduction
222
6.2
Calibration Blocks
6.3
Steps in Time Base Setting
P
sbe Characterization BI
Steps in Characterizing the Probes
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Introduction
28
6.5.2
Probe index for angled longitudinal wave probes
Distance amplitude curve, beam angle and beam width
6.5.3.1 Distance amplitude curve
6.5.3.2 Beam angle
29
6.5,3.3 Beam width
6.5.3. 4 Amplitude behavior for different
(for TRL
ing Probe
654 Estimation of dominant frequency and bandw
idth
Dead zone and near fieid
30
6.5.6 Nominal signal to noise ratio
Development of an Examination Procedure
31
Outline of Activities
7.2
Preparation of Preliminary Procee
Preparation of Reference Block
33
7.
General
33
33
7.3.2 Artificial reflect
Selection of Probes
Wave type
Probe angle
Frequency
Type
7.4.5Si
Size and geometry of probe and component
Use of Reference Blocks to Establish Dac-curves
Sensitivity Setting
introduction
6.2 Setting test sensitivity
7 6.3 Recording iev
7.6.4 Acceptance criterla
Preparation of Detailed Procedure
Written procedure requirements
772 General examination requirements
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Examination coverage
7. 7.2.2 Rate of