JB/T 9214-1999 A-type pulse reflection ultrasonic flaw detection system working performance test method
Some standard content:
3CS 19. 10
Standard of the Machinery Industry of the People's Republic of China
,FB 9214—1999
Practice for evaluating performance characteristics ofA scope-ultrasonic pulse-Eeho testing systems1949-06-28Published
State Bureau of Machinery Industry
2000-01-01 Implementation
standard 1 equivalent 249 gold high material table punch zone sealed ultrasonic in the addition of transmission grid, in the machine market standard 4 along the emission trend production flaw detection system 1 price performance test or solution ", within the standard and [SZ2144 ten must exist with "difference: the difference Sz244 text, only Appendix [~ Appendix 5 as a gift of ten must rely on; - ×J1S22144 record [- Appendix 5 made editorial changes: to reach the detailed block of the name of the internal naming: 4 standard is a B-type pulse type ultrasonic flaw system for non-test method of the revision of the original standard elastic wide weave selection The main technical contents have not changed. This standard replaces the appendix A, appendix B and appendix C of ZHJ4UDE--87, which are all appendices of the technical standard. This standard is proposed by the National Committee for Standardization of Ultrasonic Flaws. The drafting party of this standard is Shanghai Institute of Materials, and the main editor is Fei Kejing.
1 Specification
Machinery Industry Standard of the People's Republic of China
Test Method for Working Performance of A scupe ulirsonir pulse-Echo lesing Ultrasonic Flaw Detection System systemsJB/T9214—1999
Z04(K18
1.1 This standard does not apply. When recording the performance of the workpiece under the detection site, the ultrasonic flaw detection system should be used in the actual connection with the equipment, including type A pulse reflection ultrasonic flaw detector, good production probe and its high viscosity electric drive: only the standard test decision specified in this standard should be used without any electronic receiver. 1.2 This standard only specifies the test of the performance of the ultrasonic flaw detection system. The test method is not based on the performance indicators of the system or its acceptance conditions. If necessary, the supplier and the supplier may negotiate in advance to stipulate the minimum performance indicators that the ultrasonic detection system used in the acceptance of the product should achieve. 1.3 This standard does not apply to the testing of single-piece ultrasonic flaw detectors or ultrasonic probes. When testing a single piece separately, JB1006! and 1B, 110062 can be tested separately. Appropriate neutron instruments must be equipped. 1.4 This standard is only applicable to manual flaw detection: not applicable to automated ultrasonic flaw detection. 1.5 This standard is only applicable to systems including a contact ultrasonic straight probe or an inclined probe, and is not applicable to systems including other types of ultrasonic probes (such as dual-product vertical, water-floating, etc.) 2
Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through the addition of the numbers in this standard. When this standard is published, the version shown is effective. All standards will be revised. The parties using this standard shall use the following specifications as the most appropriate. GR/T5991988
High-quality steel grades and general technical conditions for non-photographic detection Technical terms Ultrasonic testing
GB/T12604.1—1990
JRT 10062- 1999
JH/T 10063- 1999
Term definitions
This standard adopts the following definitions.
3.1 Sensitivity margin
General technical case for type A pulse reflection closed acoustic flaw detector Performance test method for ultrasonic flaw detection
Standard test method for ultrasonic flaw detection No. 1 Technical conditions for ultrasonic flaw detection In an ultrasonic deep sound system, the difference between the standard defect detection sensitivity expressed at a certain level and the maximum detection sensitivity. 3.2 Resolution
Two adjacent defects at different distances from the probe can be distinguished as two passing waves on the oscilloscope. Approved by the State Bureau of Machinery Industry on 19-06-28
2000-01-01 Effectiveness
3.3 Other technical definitions according to GB/F12604.1. 4 Test items
JB/T-9214—1999
4.1 When using a straight probe: the sensitivity, vertical linearity, horizontal linearity, resolution and area are measured in accordance with the 5th, 6th, and 10th chapters respectively.
4.2 When using an oblique probe: the directivity, horizontal linearity, incident point, refraction angle, resolution and sensitivity are tested at the 6th, 7th, 10th, 12th, and 13th points respectively. 4.3 The usage history of the equipment shall be determined by the agreement between the test units and all the test items specified in the test manual. 5 Sensitivity test method
5.1 Summary
This test is sufficient to check the changes in the sensitivity of the ultrasonic flaw detection system. The sensitivity is expressed by the recorded value. Test time: Use DB-220-2 to test fast [see Appendix A (Standard Appendix)], the suppression of the detector is "" or "off", and other adjustment rates are appropriate. It is best to select the adjustment value that will be used in subsequent detection operations. 5.2 Method
5.2.1 Set the gain of the instrument to the maximum, but when the power-on noise is large, the gain should be reduced (adjust the gain controller or attenuation end). Reduce the output level to 1U% full degree. Assume that the setting value of this attenuator is 5.3.3. Place the deep head crushed on the test block, add appropriate coupling agent in the middle to maintain stable acoustic coupling, and adjust the attenuation band to reduce the half-echo quotient to 50% of the full amplitude. Assume that the reading after the attenuator is 5.2.3. The sensitivity margin of the ultrasonic flaw detector (expressed in dB) is given by formula (1): 5-3-8
6 Vertical compliance test method
This test method is to check the comprehensive effect of the gain linearity and attenuator precision of the temperature acoustic flaw detector: Use DBP2U-2 or Z20-4 test block (see Figure 4) during the test, and set the inhibitor of the flaw detector to "0" or "0", and adjust it to an appropriate value. 6.2 Method
6.2.1 Place the probe on or above the fast, add appropriate agent in the middle to maintain the specified acoustic combination, and adjust the bottom echo to the center of the thickness of 1.2.2. Adjust the inhibitor or The probe is positioned so that the effective height of the hole is exactly 100% of the full scale. At this time, the attenuator should have at least 30% of the attenuation margin.
6.2.3 Adjust the attenuator in 2dB increments. After each adjustment, record the downward amplitude attenuation as a percentage of the full scale. Continue until the value reaches 26dB. The measured value is 0.1%. The test results are listed in Table 1. The difference between the test value and the theoretical value of the wave height is the confirmed value. The sum of the absolute values of the maximum positive deviation (+) and the maximum negative deviation (-) is taken from the table as the vertical linear error (in percentage). It is given by formula (2):
6, 2.4 The method in 6.2.3 increases the signal to 30dD. It is determined whether this 6-dimensional can fully confirm the existence of the feedback effect and the extinction of the wave. The situation represents the dynamics of the system. 4.
The horizontal linearity test method
Gao Ling's thesis
JB9Z[4-1999
Table of vertical linearity test record
The range of the head
This test is to check the linearity of the ultrasonic flaw detection system. During the test, use a test block with the detection surface parallel to the bottom surface and the surface light tube core. In principle, the thickness of the test block is equivalent to 15 of the detection sound path, and any probe is used. The suppression setting of the flaw detector is "off" or "off" and adjusted to the appropriate value
7.2.1 Place the probe on the test surface and add appropriate coupling agents to ensure stable coupling. Use the screen to adjust the gain and scanning controller of the instrument. The sixth bottom wave is displayed on the group: 2.1 When the scale of bottom wave B, B, and B are 5% of the full scale respectively, their front scales are aligned with the scale and 100 (assuming that the water separation is 100 grids). If the front positions of B, B, and B are different during adjustment, they should be adjusted repeatedly: 7.2.3 Then adjust the low-frequency waves B, B, B, B, B to 50% of the full scale respectively, and read the difference between the front of the bottom wave B, B, B, 3, 4, 2, 5 and the scale 20, 40, 60, 80 respectively (in grids), and then take the largest value a (see Figure 1) 0B is adjusted to the interval-width, and it is not enough to reach the temporary resolution. Horizontal performance error 2 (in color separation) is given by formula (3):
=|awwW.bzxz.Net
B separation performance test method
8.1 General change
J8/T9214-1999
This test is to check the strength of the flaw detection system. When testing, use the No. 1 standard test block B1006 or CSK-A type test block [see Appendix B (Standard Appendix)], and set the suppression of the probe to "n" or "off": adjust the appropriate value, 8.2 Method
Same. 2.1 Place the probe on the test plate as shown in Figure 2, add appropriate adhesive to keep the sound contact, adjust the instrument's speed and move the probe left and right, so that the echo amplitudes from the A and D surfaces are equal and about 20%-30% of the full scale, as shown in Figure 3
8.2.2 Adjustment: The amplitude between the A and B waves is equal. The signal is raised to the original peak height. The number released by the attenuator at this time (equal to the value of the defect depth h read by the attenuator) is the resolution of the ultrasonic detection system expressed in dB. New Small Area Test Method X9
9.1 Overview
This test is to determine the minimum separation from the detection surface to the detectable defect of the ultrasonic flaw detection system under the condition of the maximum flaw detection sensitivity. The test is for DZ type test block [Appendix C (Standard Time Record) 1. The suppression of the flaw detector is set to "0" or "off". Except for the sensitivity source section, other adjustments are set to appropriate values:
JB/T 9214-1999
2.1 Adjust the sensitivity of the flaw detector to meet the requirements of the detection specification (for reference, a 20mm head can be used. Adjust the recording frequency so that the flat bottom of the test piece DEPZ202 or 720-4 reaches 50% of the full scale. 19.2.2 Place the head on the DZ1 test block, add a mixture in the middle to maintain a stable coupling medium, select the 2mm mold hole that can distinguish the maximum detection distance, and adjust the hole type! 50% of the full scale: if the leading edge of the wave and the intersection of the valley are lower than 10% of the full scale, then this shortest distance is the area of 10 material probe incident point test method
[0.] Summary
This test is to determine the position (incident point) of the center of the oblique probe sound beam on the flaw detector. When testing, use the standard test block JR/T 1MMi! 1 CSK-I A test block. 10.2 Method
10.2.! Place the oblique probe on the test block at the position shown in Figure 4, add appropriate adhesive to keep the probe stable and move the probe while keeping the axis of the probe sound beam parallel to the test surface until the echo reaches the target surface.
10.2.2 Read the probe side scale corresponding to the R100mm mesh center mark on the test block, that is, the shooting point of the oblique probe. The reading should be accurate to 0.5m.
11 Test method for the refraction angle or K value of the oblique probe
This test is to determine the refraction angle or (K-β) value of the oblique probe when the oblique probe is irradiated onto the inspection surface. The test object is the No. 1 standard test block (JB10063) or the CSK-1A test block. 11.2 Method
11.2.1 According to the different nominal refraction angles of the oblique probe, the probe is placed at different positions on the No. 1 standard test block (as shown in Figure 5), and appropriate coupling agent is applied in the middle to maintain stable acoustic coupling.! When the refraction angle is 34°-66°, the probe is placed at the position of Figure 5a, and the echo with a hole of 50 mm is used for measurement. b) When the refraction angle is 60°-75°, the probe is placed at the position of Figure 5b), and the echo with a hole of 50 mm is used for measurement. c) When the refraction angle is 74°-80°, the probe is placed at the position of Figure 5c, and the echo with a hole of 1.5 mm is used for measurement. a
JB/T9214-1999
Move the probe back and forth while keeping the probe line parallel to the surface of the test piece, so that the echo reaches the maximum. 11.2.2 Read the angle scale value corresponding to the probe's reflection point on the side E of the test block. This scale value is the refraction of the deep head. 11.2.3 Until the K value of the material probe is confirmed (.5\
11.2.3, the CSK-A type test block can be used to directly measure the K value of the material probe. The inclined probe is pressed on the test block and does not stop. As shown in Figure 5a! and Figure 5b), add appropriate mixture to maintain a stable combination. 1) When K is 1. (.1.5), the probe is at the position of 5u), and the echo of the 50mm hole is measured. b) When the K value is 2.U-3.0, the probe is changed to the position of Figure 5b), and the echo of the 50mm hole is measured. While the probe beam line and the side of the test block are kept in parallel, the probe is moved back and forth to make the echo reach the maximum. The scale value of the inclined probe is directly read from the scale value corresponding to the point distribution on the side of the test block. 12. Test method of resolution of inclined probe
This test is to check the resolution of the acoustic depth recovery system (angle probe). During the test, use CSK-1A tester, set the detection suppression to "0" or "off", and adjust the other parameters to the most appropriate values. 12.2 Method
12.2.1 Based on the negative or positive value of the probe, move the probe to a CSK-A type test position as shown in Figure 5a) or Figure 5b), and add appropriate frequency to maintain a constant frequency. Move the probe so that the heights of the waves A and 3 from the two holes of 50 mm and 44 mm are equal, about 20%~30% of the scale, as shown in Figure 6. Figure 6
17.2.2 Adjust the instrument to the original peak height between the two holes B. The dB number released by the attenuator at this time (the value of the notch depth read later) is the resolution of the ultrasonic flaw detection system (angle probe) expressed in B value. 13. Test method for sensitivity margin of angle probe
13. 1 Overview
The test is to check the sensitivity change of the ultra-small flaw detection system after a period of use, and to show the relative values of different material delivery lists in your application. When testing, use the standard test piece (JB [0063]) or SK: A type test block. The detection value only suppresses the lower "0" or "off", and then takes the appropriate value. 13.2
JB/F9214—1999| |tt||13,2.1 Adjust the ultrasonic probe to full scale. If the voltage is too high, lower the voltage! Adjust the gain control or attenuator! Speed center noise reduction: 0% full scale: Assume that the attenuator reading is n: 13.2.2 Press the probe on the fast, the position is shown in Figure 4. Add the appropriate compound to keep the output stable: adjust the meter to reduce the return distance of the curve R100mm. 50% full scale. Assume that the attenuator value is 13.2.3. The sensitivity of the material detection is 1. The test report is as follows: 1. In a test, in addition to recording the test results of each item as required, the following items shall be recorded: a. The manufacturing, type and abbreviation of the flaw detection probe: b. The manufacturing name, type and number of the test block: e) Visual frequency standard:
d) Instrument controller adjustment:
C) Test operator name:
[】Test period:
) Steps: First specify the contents of the full record
A1 Shape and size
A1 Technical requirements
JB/T9214-1999
Appendix A
Difficult to record)
DB-P The material of the test block is 45 carbon structural steel, and the chemical composition must meet the requirements of (B section 69): the test material is designed and heat treated, and the grain size is reduced to level 7:) During the test, the flaw detection is carried out at a frequency of more than 2.5MHz and high sensitivity conditions. No defects larger than 1/4 of the echo amplitude reflected from the 2mm flat bottom at 20mm from the detection surface shall appear. B1 Shape and size
B2 Technical requirements
JBT9214-1999
Appendix B
(Appendix to the standard)
csK-IA type test defect
Five-engine fuel limit
Metric tolerance 0.1
Each vertical point is not more than 0.05
a) The test material is 20 high-quality stirring attenuation structure pins, mainly chemical The chemical composition shall comply with the provisions of (T699): b) The test block is forged and heat treated: the particle size must be graded: c) Use a 5M[2 straight probe to conduct full-area direct and direct testing of the front, rear side, top and bottom of the test block. No defects other than 20% of the detected surface can be found. C1 Shape and size
C2 Technical requirements
JB/T 92E4-1999
Appendix C
. Standard drive record:
(l. 2 ± 0 c5
+-I+:+
a: The test block material is 4: high carbon steel, and the chemical composition must comply with the provisions of GB/T699. The final design and heat treatment of the test block should meet the requirements of the quality level. The detection surface and side of the test block are tested under the conditions of 2.5M hole, 1 phase rate and high sensitivity. There should be no defect echo with a amplitude of 14 reflected from a 2mm flat bottom hole 2mm away from the test surface.
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