2023年5月第3期《大型铸锻件》HEAVYCASTINGANDFORGINGMay2023No.3■■■■■■■■■■■■■■■■■■检测与分析大规格薄壁球壳锻钢件超高灵敏度超声检测张侃张昕(中国第二重型机械集团德阳万航模锻有限责任公司,四川德阳618000)摘要:通过理论分析和试验验证,得出一种大规格薄壁球壳锻钢件超高灵敏度超声检测技术工艺方案。对于易生锈材质,检测面为凸球面和凹球面的大规格薄壁球壳锻钢件,不能采用水浸法检测;当采用非水耦合剂接触法进行检测时,需解决探头与异形表面耦合和灵敏度问题。检测时需采用专用的对比试块调节检测灵敏度和评定缺陷。关键词:大规格薄壁球壳;锻钢件;超声检测;超高灵敏度中图分类号:TG115.28文献标志码:AUltra⁃highSensitivityUltrasonicTestingofLarge⁃sizeThin⁃walledSphericalShellSteelForgingsZhangKan,ZhangXinAbstract:Throughtheoreticalanalysisandexperimentalverification,aprocessschemeofultra⁃highsensitivityultrasonictestingtechnologyforlarge⁃sizethin⁃walledsphericalshellsteelforgingshasbeenobtained.Forrust⁃pronematerials,large⁃sizethin⁃walledsphericalshellsteelforgingswithconvexandconcavesphericaldetectionsurfacescannotbedetectedbywaterimmersionmethod.Whenthenon⁃aqueouscouplingagentcontactmethodisusedfordetection,thecouplingandsensitivityproblemsbetweentheprobeandthespecial⁃shapedsurfaceneedtobesolved.Thespecialcontrasttestblockshouldbeusedtoadjustthedetectionsensi...