学术讨论—UT探伤通用规程[1].docx
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1、超声波探伤通用规程UT General Specification15/15 Material: EN-GJS-400-18U-LT REFERRENCE: EN 12680-3 检验规程内容: Content 1.0适用范围/scope 2.0参考标准/reference 3.0检验人员/ NDT-Personnel4.0超声波检测/ Ultrasonic testing5.0检验报告/Examination report1.0 适用范围 / scope本标准是铸件的检验规程和验收标准。本标准覆盖检验区域。This specification is the inspection proced
2、ures and acceptance criteria of casting. Inspection areas are covered by this specification.2.0参考标准/referenceGB9445-99:中国机械工程无损检测学会无损检测人员资格及鉴定/non-destructive testing institution of the Chinese mechanical engineering society qualification and certification of NDT personnelEN473 : NDT 无损探伤试验人员的资格和资格证
3、-总那么/ qualification and certification of NDT personnelgeneral principles.SNT-TC-1A:无损探伤人员资质/ qualification and certification of NDT personnelEN12680-3:铸造-超声探伤-第3局部:球墨铸铁/Founding-Ultrasonic examination -part 3: Spherical graphite cast iron castings.ISO 8501-1:外表粗糙度/visual assessment of surface cleanl
4、iness993062:超声波设备的校准/Ultrasonic equipment calibration and verificationEN126681:无损检测超声设备的特点和验证第1局部:仪表。EN 12668-1:Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 1: instruments.EN126683:无损检测超声设备的特点和验证第3局部:设备组合。EN 12668-3:Non-destructive testing -
5、Characterization and verification of ultrasonic examination equipment - Part 3: Combined equipment.EN12223:无损检测超声检测校准试块No.1的标准。EN 12223:None destructive testing Ultrasonic examination - Specification of calibration block no.1.3.0检验人员/ NDT-PersonnelNDT人员至少应获得一个下述标准证书的认证:NDT-Personnel must be qualifie
6、d to one of the following certification standards: GB9445-99:中国机械工程无损检测学会无损检测人员资格及鉴定/nondestructive testing institution of the Chinese mechanical engineering society qualification and certification of NDT personnelEN473 : NDT 无损探伤试验人员的资格和资格证-总那么/ qualification and certification of NDT personnelgener
7、al principles.SNT-TC-1A:无损探伤人员资质/ qualification and certification of NDT personnel根据EN 473 或ASNT SNT-TC-1A的规定,所有无损试验的检验员,都要经过培训到达2级的资质水平。他们假设不够2级水平,那么应在2级甚至3级资质水平的人员指导下工作。供货方的3级人员,应定期培训自己的NDT工作人员。All NDT inspectors must be trained and certified lever 2 inspectors according to EN 473 or ASNT SNT-TC -
8、1A or they should perform the test under direct supervision of a lever 2 or lever 3(according to one of the earlier mentioned standards)inspector. The lever 3 inspector of supplier should do periodic training for their inspectors. 4 超声波检测/Ultrasonic testing4.1外表条件/surface conditioning在零件作超声波检查以前,外表要
9、到达ISO 8501-1规定的外表质量Sa2.5级。Prior to UT the surface quality of the component must reach Sa 2 1/2 in accordance with ISO 8501-1.未经机加工的粗糙外表应根据所需的检查要求进行打磨。Rough surfaces on un-machined items shall be ground to the extent necessary for performing the examination.所有的待检外表应无溶渣、剥落、灰尘和其它可能阻碍检查的杂质。All surfaces
10、to be inspected shall be free of dross, scale, dirt and other foreign matter that may interfere with the inspection.4.2检查范围/Extent of examination应根据所述的零部件适用质量标准进行超声波探测评估。Ultrasonic testing shall be evaluated in the zones as stated in applicable quality specification for the specific component.4.3设备和
11、耦合介质灵敏度/Equipment and coupling medium 超声波探伤仪 Ultrasonic instrument 超声波探伤仪须符合EN 12668-1中规定的要求(本厂使用EPOCH 4和EPOCH LT),须具有以下特点: The uultrasonic instrument shall meet the requirements given in EN12668-1The instrument EPOCH 4 and EPOCH LT shall be used in my factoryand shall have the following character:-
12、量程设定,设定范围需至少为10mm2m,需能够连续选择,需适合于钢中传播的纵波和横波;-range setting, from at least 10mm to 2m continuously selectable, for longitudinal and transverse;-增益,须能够在一个至少为80dB的范围内进行调节,调节的最大差级为2dB,测量精度为1 dB;-gain, adjustable in 2dB maximum steps over a range of at least 80dB with measuring accuracy of 1dB;-时基和垂直线性度须小
13、于显示屏幕调节范围的5%,水平线性小于1%;-time-base and vertical linearities less than 5% of the adjustment range of the screen, the horizontal linearity shall be better than 1%;探头和传感器的频率/Probes and transducer frequencies-采用单晶探头和双晶探头的脉冲回波技术中,其适用的频率为2MHZ,-suitability for nominal frequencies 2 MHZ in pulse-echo techniqu
14、e with single-crystal and twin-crystal probes.-以下探头至少要有一个被使用: SEB2-00(MSEB2)和B2S(MB2S)或者有一个相同特性的探头。探头SEB2-00 (MSEB2)用于铸件壁厚0200mm处,探头B2S(MB2S)用于铸件壁厚200500mm处。 首先使用SEB2-00 和B2S探头检测, 当需要精确测量缺陷的边界时使用MSEB2-00 和MB2S探头。-Following probe head must have at least one to be used: SEB2-00 ( MSEB2) and B2S ( MB2S
15、) or have a same characteristic probe head. The probes of SEB2-00 (MSEB2) are used for the casting thickness of 0200mm. The probes of B2S ( MB2S) are used for the casting thickness of 200500mm. First use the probe of SEB2-00 and B2S for inspection. If needs to identify the actual borderline of the d
16、efects, use the probes of MSEB2-00 and MB2S. -声束直径的补偿/ the compensation of diameter of sound beam为了判定一个缺陷的大小是“可测量还是“不可测量,声束的直径可以进行补偿。补偿可以通过计算对在远场中的单晶探头,或根据平底孔的测量值双晶探头进行。声束直径的补偿只能被用在不可测量缺陷的局部。-In order to determine the size of an indication is “measurable or “not measurable, the diameter of the sound
17、 beam may be compensated for. This may be done based on calculations (for single crystal probes in the far field) or base on measurements of flat bottom holes (for dual twin crystal). 在表1中提到的标准值可供用。The values for standard probes mentioned in Table 1 may be used.声程mmSound pathSEB2声束直径mmDiameter of so
18、und beam for SEB2MSEB2声束直径mmDiameter of sound beam for MSEB2B2S声束直径Diameter of sound beam for B2S20155-20-601515-60-120202512表 1.标准探头的校正值/table 1 Correction values for standard probes耦合剂/ couplant使用超声波浆糊。Ultrasonic jelly shall be used.4.4校准 /Calibration按照现行标准993062对超声波设备进行校准。Ultrasonic equipment cal
19、ibration and verification must be carried out according to present 993062 standards.标准参考/NORMATIVE REFERENCESEN126683 无损检测超声设备的特点和验证第三局部:设备组合。EN 12668-3 Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 3: Combined equipment.EN12223 无损检测超声检测校准试块No
20、.1的标准。EN 12223 None destructive testing Ultrasonic examination - Specification of calibration block no.1.设备/EQUIPMENT参考试块K1 DS/EN 12223 Reference block V1 DS/EN 12223 no. 2572参考试块K2 DS/EN 27963可利用两个宽度12.5mm和20mmReference block V2 DS/EN 27963 no. 50434-22274 (it is available in two widths 12,5mm and
21、20mm)参考试块TIF长横孔试块Reference block TIF no. 061316测试范围/ SCOPE OF THE TEST新的设备和探头组合最初使用时,必须对它作一个根本的测量,并且记录在登记簿上。Initially when a new combination of ultrasonic instrument and probe is taken into use, it is necessary to make a base measurement, which is registered in the registering scheme for base measur
22、ements.每一个测量点完成,记录好数值,对于剩余的测量点,做好任务标记。For test points where a value is achieved, note the value. For the rest of the points, sign for performing the task.探头必须每工作日校验,对于测定信噪比和脉冲持续时间距离上一次使用每周一次已是足够的。仪器常规每周校验一次,但是如果使用中对仪器有疑心,必须立即校验。The user test of probes must be performed daily. For establishing a sign
23、al to noise ratio and pulse duration a weekly test is sufficient and only for probes, which have been used since the last test. The test of the ultrasonic instrument is performed once a week. If the user has a suspicion that an error has occurred, the test must be performed immediately.直探头/NORMAL PR
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