SDH horizontal hole test block-test report
SDH transverse hole test block, non-destructive testing-ultrasonic test reference test block and method for measuring the sound beam contacting the probe GB / T18852-2002.
Test Report:
Ultrasonic test block test report
Numbering:
Production Date:
name
Standard test block
Specification model
SDH
Executive Standard
GB / T18852-2002
Material
1Crl8Ni9Ti
Types of rough
Forged parts
Heat treatment state
Solution treatment
Serial number
Test items
Inspection requirements
Actual situation
1
Chemical composition of body material
The main chemical composition should meet GB1220-2007 "Stainless steel bar and plate technical conditions" (sampling inspection)
2
Body material grain size
After solid solution treatment, the grain size should be above 5 grades, and the hardness is 250 ± 25HB (sampling test)
3
Internal defect of body material
When the blank is subjected to 100% flaw detection, there should be no defect signal 8dB smaller than the signal of the flat bottom hole with a diameter of 2mm in the axial and radial interior of the blank
4
Acoustic characteristics
When the test surface of the test block and the surface are inspected with a straight probe at a frequency above 1.25MHz, no defect echo greater than 1/4 of the echo amplitude of the flat bottom hole 2mm in diameter at a distance of 20mm from the measurement surface
5
Exterior
The surface must not have obvious scratches, bumps, rust and other defects, surface roughness, detection surface Ra1.6, transverse through hole cylindrical surface Ra3.2, the rest Ra6.3
6
Geometric size, opening tolerance ± 0.05
The verticality of each side is not more than 0.05
The parallelism between the standard hole and the processing surface is not more than 0.05
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