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

FORGED ALUMINIUM

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