1、超声波探伤通用规程UT General Specification14/14 Material: EN-GJS-400-18U-LT REFERRENCE: EN 12680-3 检验规程内容： Content 1.0适用范围/scope 2.0参考规范/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本规范是铸件的检验规程和验收标准。本规范覆盖检验区域。This specification is the inspection proced
2、ures and acceptance criteria of casting. Inspection areas are covered by this specification.2.0参考规范/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、-总则/ 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部分:球墨铸铁/Founding-Ultrasonic examination -part 3: Spherical graphite cast iron castings.ISO 8501-1：表面粗糙度/visual assessment of surface cleanli
4、ness993062：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部分：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部分：设备组合。EN 12668-3：Non-destructive testing - C
5、haracterization 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的规范。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 qualified
6、 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-总则/ qualification and certification of NDT personnelgeneral
7、 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，都要经过培训达到2级的资质水平。他们若不够2级水平，则应在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 -1A o
8、r 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表面条件/surface conditioning在零件作超声波检查以前，表面要达到IS
9、O 8501-1规定的表面质量Sa2.5级。Prior to UT the surface quality of the component must reach Sa 2 1/2 in accordance with ISO 8501-1.未经机加工的粗糙表面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.所有的待检表面应无溶渣、剥落、灰尘和其它可能妨碍检查的杂质。All surfaces to b
10、e 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规范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设备和耦合介质
11、灵敏度/Equipment and coupling medium 4.3.1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 EN12668-1（The instrument EPOCH 4 and EPOCH LT shall be used in my factory）and shall have the following characte
12、r:-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
13、度须小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%;4.3.2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
14、technique 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 B2
15、S ( MB2S) 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 defects, 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部分。-In order to determine the size of an i
