Asme V T764.2 Magnetic Particle Testing Circular Artificial Groove Sensitivity Tablet
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ASME V T764.2 Circular Artificial Groove Magnetic Test Specimen Magnetic Particle Sensitivity Test Tablet
1.Type A1 magnetic particle sensitivity test tablet
1.1 The test sheets are made according to the requirements of TYPE
A1 (after annealing treatment) in GB/T23906, JB/T4730-2005 and
JB/T6065-2004, "Test Sheets for Magnetic Powder Testing in
Nondestructive Testing".
1.2 This test piece is used to verify the direction and magnitude
of magnetic field intensity on the workpiece surface and the
comprehensive performance of magnetic particle testing.
2. Supporting components and specifications
2.1 This test sheet includes six specifications: A1-7/50, A1-15/50,
A1-30/50, A1-15/100, A-30/100 and A-60/100.
2.2 Size specification of test piece and corresponding magnetic
field intensity
Sample thickness: 50±5μm and 100±10μm
The edge length of the test piece: 20±1㎜
Circular artificial groove diameter: 10±0.5㎜
Cross artificial slot length: 6±0.3㎜
Gauge artificial groove depth μm corresponds to sensitivity
circumferential magnetization specification and corresponding
magnetic field intensity
A1 7/50±1.0μm High sensitivity (11-12)D3520 ~ 3840A/m(44-48 Oe)
A1 15/50±2.0μm Sensitivity (8 ~ 9) D2560-2880A /m (32 ~ 36 Oe)
A1 30/50±4.0μm Low sensitivity (5 ~ 6) D1600-1920A /m (20 ~ 24 Oe)
A1 15/100±2.0μm High sensitivity (11-12)D3520 ~ 3840A/m(44-48 Oe)
A1 30/100±4.0μm sensitivity (8 ~ 9)D2560 ~ 2880A/m (32 ~ 36 Oe)
A1 60/100±8.0μm Low sensitivity (5 ~ 6) D1600-1920A /m (20-24 Oe)
Artificial groove width: 60 ~ 180μm
※ The circumferential magnetization specification and corresponding
magnetic field strength in the table are the test results of
normalized 45 steel sample for reference.
3. Use method
3.1 According to the need of flaw detection sensitivity, select the
type A test piece of appropriate specifications.
3.2 The surface of the workpiece must be flat and smooth, not
convex or concave uneven; Will try a moment with artificial groove
side down, with good adhesive tape paper from all around it and the
workpiece closely. Note: When pasting, the tape should not cover
the slotted part on the back of the test piece; All sides must be
closely fitted, there can be no warping phenomenon (especially on
the surface of the shaft).
3.3 specimens with the workpiece can be as a magnetic particle
inspection quality control samples, at the beginning of the working
class a day to verify magnetic system comprehensive performance,
such as magnetic image display, after the specimens ruled out the
joint bad reason, analysis its reason (magnetic suspension, process
equipment, etc.) and take corresponding measures to solve, magnetic
inspection to ensure quality.
3.4 The test piece is made of pure iron sheet, which should be
prevented from wrinkling when used, coated with anti-rust grease
after use, and properly kept (the grease should be washed away
before use).
3.5 If the sample is wrinkled, broken and corroded, it will affect
the use effect and should not be used again.
TYPE A1
TYPE C
TYPE D
TYPE M1
1# 15/100μ
2# 30/100μ
3# 60/100μ
4# 7/50μ
5# 15/50μ
6# 30/50μ
| Description | Type A1 | Type D | Type C | Type M1 | ||
| Specimen thickness (um) | 100±10 | 50±5 | 50±5 | 50±5 | 50±5 | |
| Specimen length (mm) | 20±1 | 20±1 | 10±0.5 | 10±0.5 | 20±1 | |
| Specimen width (mm) | 20±1 | 20±1 | 10±0.5 | 50±5 | 20±1 | |
| Cut off rule (mm) | 5±0.5 | |||||
| Man-made Round groove diameter (mm) | High resolution | 10±0.5 | 10±0.5 | 5±0.3 | 12 | |
| Middle resolution | 9 | |||||
| Low resolution | 6 | |||||
| Man-made Cross groove length (mm) | High resolution | 6±0.3 | 6±0.3 | 3±0.2 | ||
| Middle resolution | ||||||
| Low resolution | ||||||
| Man-made Groove depth (um) | High resolution | 15±2.0 | 7±1.0 | 7±1.0 | 8±1.0 | 7 |
| Middle resolution | 30±4.0 | 15±2.0 | 15±2.0 | 15±2.0 | 15 | |
| Low resolution | 60±8.0 | 30±4.0 | 30±4.0 | 30±4.0 | 30 | |
| Man-made Groove width (um) | 60-180 | |||||
MT test block
Type N1: 45N, 5kgs
Type N2: 118N 12kgs
Type N3: 177N 18kgs
MT standard block
Katos rong type B: DC HRC=90～95, 12 drilling through holes diameter 0.07inch, center hole diameter 31.8mm
Type E: AC
Asme V T764.2 Magnetic Particle Testing Circular Artificial Groove Sensitivity Tablet
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