SEP1922 铁素体钢铸件的超声波检验.pdf

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STAHLーESEN
PRJEFBLATT
Uitrasonic testing of ferritic steel castings
STEEL IRON
TEST SHEET
1922
1.Aim and manner of testing
This sheet deals with the ultrasonic testing of ferritic steel
castings for determining interral flaws as per the echo method
2. Scope
This sheet holds good for the testing of heat-treated unalloyed
alloyed ferritic steel castings with wa11 thicknesses of uptの6ののmm
In the case of larger thicknesses special agreements relating to the
method of testing and the registration levels are to be conc luded
The requirements governing the suitability of the castings for
ultrasoni
testing and the limits for echo displays that need to be
recorded are subdivided into test classes as rer Sections 9 and 10
hey are based on the envisaged stressing of the casting
nd are to
be stipulated ix the order after agreernert between those concerned
Deviat1じ:いeaざゥ1℃i1
3. Terminology
ermns for ultrasonic testing used in this steel iron test sheet
correspond to the stipulations of DIN 54119
Ultrasonic testing
も eim
4. Agreement to be concluded prior to the testing
T'o 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 must
ri. a position ta carry out tests properly in accordance with thi
steeー iron test sheet
The qualif
atioris of the testing personnel as
per specific training guidelines such as the Deutschen Gesellschaft
SP1922
uer zerstoerungsfreie Pruefung or the Americ an
destructive Testingsnt-tc-1a or even as per factor
ociety for Non-
should be conman: icated to the
guidelines
n request
The manufacいarerとhasむ a riomnlriate a u&ユ ifled testing comittee,
6. Preparation of the castings to be teste
est surface of the castings must be conditioned ir suck a manner
that a trouble-free coupling of probes is possible
his is attained when the
ace finish correspords to the referece
specimens 4 S 1(in the case of blasted surfaces or 4s2 in the
case of ground surfaces of the standard series CTIF-341-02
7. Testing system
Y 1 Specifications for the ultrasonic testing device
The ultrasonic testing devices to be used must correspond to
che state
ot the art; this means they should possess the following features
Ad Justment range (time-base range) of at least 20 mm to
infinitely variable for the longitudinal and transverse waves ir
Amplification in steps of 2 db over a range of at 1east 80 db and
adjustable with a precision of 1 db
Linearity of the time-base deflectio (sweep and a vertical
Iinearity better than 5%of the adjustment range or the height ot
the visual display screen
ーー Usable with probes with a rated frequency of1to6Mzだ or the
echo method employing single probes and TR probes
7.2 Probes and test frequency to be employed
Depending on the geometry of the casting and the type ot 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
bea probes or TR angle beam probes are used
For inclin