Magnetic Testing

NDT course on Magnetic Testing

Computer Based Training Course on "MAGNETIC PARTICLE TESTING"
DETAILED CONTENTS
(see Contents )


1. METALLURGY OF STEEL
1.1. Steel
Introduction
Components
Solidification
Iron-carbon diagram
1.2. Heat treatments
Introduction
Annealing
Normalisation
1.3. Production of carbon steels
Manufacturing process
Classification of products
1.4. Study of defects
Discontinuities in steel
Discontinuities in forged pieces
Discontinuities in castings
Discontinuities in rolled plates
Discontinuities in pipes
Discontinuities in welded joints

2. PRINCIPLES OF ELECTROTECHNICS
2.1. Natural magnetism
Magnets
Magnetic field
2.2. Electricity and magnetism
Introduction
Rectilinear Conductor
Loop
Coil
Solenoid
Toroidal Coil
Magnetomotive Force
2.3. Magnetic properties of matter
Ferromagnetism
Magnetic Induction
Magnetic Hysteresis Loop
Magnetic Flux
2.4. Electric current
Electric current definition
Kinds of current
Alternating current parameters
Measuring instruments
2.5. Standard units


3. MAGNETIZATION METHODS
3.1. Examination principle
Magnetic Particle Examination
Advantages and Limitations
3.2. Criteria for the piece examination
Examination methods
Magnetization methods
Types of magnetization
3.3. Current-flow method techniques
Current-flow method techniques
Electrodes at either end of the piece
Prod technique
3.4. Magnetic-field method techniques
Central conductor
Yoke technique
Coil (cable wrap)
Through-cable technique
3.5. Magnetizing Currents
Current types
Direct current
Alternating current
Rectified current
Current values

4. EXAMINATION EQUIPMENT
4.1. Magnetic particles
Types of examination medium
Dry examination medium
Wet examination medium
Examination medium with contrast paint
4.2. Characteristic of the particles
Types of powders
Efficiency of powders
Checking the efficiency of powders
4.3. Lighting lamps
Classification
Wood light
4.4. Examination equipment
Classification
Stationary magnetic-particle inspection unit
Generator for prod examination
Portable magnets
Portable electromagnets
Efficiency of the equipment

5. EXAMINATION PROCEDURE
5.1. Preliminary activities
Test piece inspection
5.2. Practical rules for magnetization
ASME rules

5.3. Checking the magnetizing field
Optimum induction level
Instruments for the checking of magnetizing field
The ASME field indicator
Berthold's probe
Reference block
Gauss meter
5.4. Sequence of operations
Surface preparation
Checking for residual fields
Magnetization and sprying
Visual inspection
Demagnetization
Protective treatment where necessary
5.5. Evaluation of the test results
Detecting a discontinuity
Types of indications
Types of discontinuities