等温淬火球墨铸铁厚壁工件无损检测方法的对比研究  

Comparative Study on Non-Destructive Testing Methods of Austempered Ductile Iron Thick-Walled Workpiece

作　　者：章文显 桑劲鹏 胡珈源 高立 陆春宇 ZHANG Wen-xian;SANG Jin-peng;HU Jia-yuan;GAO Li;LU Chun-yu(CRRC Qishuyan Research Institute Co.,Ltd.,Changzhou 213011,Jiangsu,China;Wuxi Industrial Innovation Research Institute,Wuxi 214101,Jiangsu,China)

机构地区：[1]中车戚墅堰机车车辆工艺研究所股份有限公司,江苏常州213011 [2]无锡市产业创新研究院,江苏无锡214101

出　　处：《铸造》2024年第5期683-687,共5页Foundry

摘　　要：探讨了等温淬火球墨铸铁厚壁工件的孔洞类缺陷检测方法,分别进行了常规超声检测、相控阵超声检测、γ射线照相检测和高能X射线数字成像检测试验。对于壁厚范围60~135 mm的区域,超声检测体现了更高的检测灵敏度,可以检出Φ0.9 mm反射当量的单个缺陷以及区域性缺陷。Co60、Ir192以及9MeV射线数字成像检测的检测效果较差,难以发现厚壁工件中细小的缺陷;450 kV射线数字成像检测设备可以检出薄层结构的疏松。The cavity-type defect detection method of austempered ductile iron thick-walled workpiece is discussed.Conventional ultrasonic testing,phased array ultrasonic testing,γradiographic testing and high energy x-ray digital radiographic testing are carried out respectively.For the area with wall thickness ranging from 60 mm to 135 mm,the ultrasonic testing shows higher detection sensitivity,and can detect single defects withΦ0.9 mm reflection equivalent and regional defects.The detection effect of Co60,Ir192 and 9MeV digital radiographic testing is poor,and it is difficult to find the fine defects in the thick-walled workpiece.The 450 kV digital radiographic testing can only detect the obvious shrinkage in the thick-walled workpiece.

关 键 词：等温淬火球墨铸铁 厚壁工件 超声检测 射线检测 

分 类 号：TG143.5[一般工业技术—材料科学与工程] TG115.2[金属学及工艺—金属材料]