SEP 1922-1985 铁素体钢铸件的超声波检验.pdf

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Uitrasonic testing of ferritic steel castings
STEEL IRON
TEST, SHE配T
1922
1. Aim and manner of testing
This sheet deals with the ultrasonic testing of ferritic stee
castings for deternining interral flaws as per the echo method
cose
This sheet holds good for the testing of heat-treated unalloyed arld
alloyed ferritic steel castings with wall thicknesses of upto 690 mm
In the case of larger thicknesses special agreements relating to the
method of testing annd the registration levels are to be concluded
The requirements governing the suitability of the casti
ultrasoni
s for
testing and the limits for echo displays that need to be
recorded are subdivided into test classes as Rer Sections 9
1の.6
hey are based on the envisaged stressing of the castings and are to
be stipulated
n the order after agreement betweer those concerned
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3. Terminology
he termns for ultrasonic testing used in this steel iron test
heet
correspond to the stipulations of DIN 34119-ultrasonic testing
もerms
4. Agreement to be concluded prior to the testing
To be agreed upon while placing an order are
scope of testing (see Section 10.1)
Test class(see Section 10.6)
Evaluation criteria(see Section 13)
5. Qualifications of the test personnel
After training and accumulating experience, the testing personnel rust
be ir a position to carry olt tests properly in accordance with this
steel-iron test skeet
The qualifications of the testing personnel as
per specific training guidelines such as the Deutschen Gesellschaft
SEP 1922
fuer zerstoerngsfreie Pruefung or the American
destructive testing
Cュ ety for No
STT-TC-16 or even as per factory guidelines
should be communicated to the client on request
The manufacturer has to nominate a qualified testing corunittee
6. Preparation of the castings to be tested
The test gurface of the castings must be conditioned in such a manner
that s trouble-free coupling of probes is possible
This is attained when the surface finish corresponds to the refererce
specimens 4 S 1(in the case of blasted surfaces or 4s2(in the
case of ground surfaces of the standard series CTIE-341-02
7. Testing system
7. 1 Specifications for the ultrasonic testing device
The ultrasonic testing devices to be used must correspond to the
of the art; this mears they should possess the following feature. state
Ad justment range(t主me- base range)っfat1east2の mm to2m
infinitely variable for the Iongitdiral and transverse waves ir
Arp1 ification in steおのf2 db over a range of at1east8り DB and
ad Jjustable with a precision of 1 db
Linearity of the time-base deflection (sweep
ad a vertical
linearity better thar 5% of the ad justment range or the height of
the visual display scree
Usable with probes with a rated frequency of 1 to 6 Miz for the
echo method employing single probes and TR probes
7. 2 Probes and test frequenc
cy to be employed
Depending or the geometry of the casting and the type of flaw to be
detected, straight beam or angle beam probes or both are used for
testing. For testing of regions lying next to the surface TR straight
bean probes or TR angle beam probes ere