CAJ | 학술논문

基于磁记忆检测技术进行压力容器预制缺陷应力集中检测，依据预制缺陷位置磁记忆检测信号特点确定压力容器上未熔合、未焊透、局部减薄三种缺陷的磁记忆信号特点，并利用 X 射线检测结果验证磁记忆定性分析三种缺陷类型的有效性；对压力容器进行水压试验，试验后焊缝残余应力得到释放，焊缝及缺陷位置磁记忆检测信号有所减弱，但通过分析水压试验后压力容器缺陷位置的磁记忆检测信号，可判断部分焊缝缺陷位置出现宏观裂纹扩展缺陷，并利用打磨焊缝方法进行验证。
기우자기억검측기술진행압력용기예제결함응력집중검측，의거예제결함위치자기억검측신호특점학정압력용기상미용합、미한투、국부감박삼충결함적자기억신호특점，병이용 X 사선검측결과험증자기억정성분석삼충결함류형적유효성；대압력용기진행수압시험，시험후한봉잔여응력득도석방，한봉급결함위치자기억검측신호유소감약，단통과분석수압시험후압력용기결함위치적자기억검측신호，가판단부분한봉결함위치출현굉관렬문확전결함，병이용타마한봉방법진행험증。
Three types of weld defects of slag inclusion,the lacking of penetration and local thinning were defined by the MMM characteristics which were obtained by the magnetic memory testing of pressure vessels on the locations of prefabricated defects,and were verified by X ray examination,showing the effectiveness of MMM qualitative analysis on three types of defects.After hydrostatic test of pressure vessels,residual stress is released that is to cause magnetic memory testing signal to be weakened.Through analysis of these signals one can however find the macro expansion cracks appearing in some weld defects,which can be verified by polishing the welds.