1 Scope
This standard specifies the requirements of magnaflux to parts surface, inspection equipment, magnetic particle, magnetic suspension liquid, magnetization method, inspection method, magnetization specification, inspection sensitivity calibration and demagnetization.
This standard is applicable to the magnaflux of inspection of diesel injection nozzle, plunger of injection pump and delivery valve of injection pump made from ferromagnetic materials.
2 Normative References
The following documents are essential for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 253 Kerosine
GB/T 15822.2 Non-destructive Testing - Magnetic Particle Testing - Part 2: Inspection Media
GB/T 23907-2009 Non-destructive Testing - Shims for Magnetic Particle Testing
3 Requirements of Magnaflux to Parts Surface
3.1 The roughness of parts surface shall be Ra3.2μm.
Foreword i
1 Scope
2 Normative References
3 Requirements of Magnaflux to Parts Surface
4 Inspection Equipment
5 Magnetic Particles
6 Magnetic Suspension Liquid
7 Magnetization Method
7.1 Circumferential Magnetization Method
7.2 Longitudinal Magnetization Method
7.3 Compound Magnetization Method
8 Inspection Method
8.1 Continuous Method
8.2 Residual Method
9 Magnetization Specification
9.1 Magnetic Field Intensity of Continuous Method and Current of Residual Method
9.2 Current in Circumferential Magnetization by Continuous Method
9.3 Determination of Magnetic Field Strength during Longitudinal
Magnetization with Solenoid Coil
10 Inspection Sensitivity Calibration
11 Demagnetization
