磁粉检测试片不同缺陷槽的功能探讨  

Exploration of the functions of different defect grooves in magnetic particle testing specimens

作　　者：叶永魁 周浩 吴志男 王亚州 陈学晋 YE Yongkui;ZHOU Hao;WU Zhinan;WANG Yazhou;CHEN Xuejin(Fujian Ningde Nuclear Power Co.,Ltd.,Ningde 352000,China)

机构地区：[1]福建宁德核电有限公司,宁德352000

出　　处：《无损检测》2024年第10期88-92,共5页Nondestructive Testing

摘　　要：当前,在使用单磁化方向磁粉探伤机检测时,一般利用现行磁粉检测试片的线性缺陷槽和圆形缺陷槽进行检测灵敏度验证。参考相关国家标准、国际标准,结合磁粉检测工作的实际经验,通过分析发现:用现行试片在一个平面检测区域内进行检测灵敏度验证时,有些偏离磁场磁化方向的角度朝向上的检测灵敏度验证有时是失效的;实际工作中,现行试片缺陷槽难以用于1次磁化有效检出缺陷的角度范围测算进而计算出最少磁化次数,故难以使用现行试片缺陷槽来避免漏检;多角度缺陷槽磁粉检测试片能解决现行试片存在的灵敏度验证有效性不足与实际检测工作中难以测算最少磁化次数等问题。该结论有望为磁粉检测的检测灵敏度验证提供一些参考。Currently,when using a single magnetization direction magnetic particle testing machine for testing,sensitivity verification is generally carried out using the linear defect groove and circular defect groove of the current magnetic particle testing specimen.The authors referred to relevant national and international standards,combined with practical experience in magnetic particle testing work,and through analysis,found that:when using current test pieces to verify the detection sensitivity in a planar detection area,some angles deviating from the direction of magnetic field magnetization were facing upwards,and the detection sensitivity verification sometimes failed;In practical work,it was difficult to use the current defect slot of the test piece to calculate the angle range for effective detection of defects in one magnetization and calculate the minimum number of magnetization times,so it was difficult to use the current defect slot of the test piece to avoid missed detections;Multi angle defect groove magnetic particle testing specimens can solve the problems of insufficient sensitivity verification effectiveness and difficulty in calculating the minimum magnetization number in actual testing work for all current specimens.

关 键 词：磁粉检测 灵敏度 试片 磁场 磁场强度 磁化方向 

分 类 号：TG115.28[金属学及工艺—物理冶金]