CAJ | 학술논문

大型钢结构件焊接时，由于热输入或过快冷却等原因，易产生应力，当应力达到材料本身不能承受的程度时，焊缝就会产生裂纹。为此，探伤人员需要具有斜角探伤的理论和实践经验及熟练的操作技艺。本文介绍了用超声波方法来检测横向裂纹的原理、扫查方式，利用横向裂纹所特有的回波特性进行结果的判定。
대형강결구건한접시，유우열수입혹과쾌냉각등원인，역산생응력，당응력체도재료본신불능승수적정도시，한봉취회산생렬문。위차，탐상인원수요구유사각탐상적이론화실천경험급숙련적조작기예。본문개소료용초성파방법래검측횡향렬문적원리、소사방식，이용횡향렬문소특유적회파특성진행결과적판정。
When welding the steel structure, it will generate tensile stress due to its heavy heat input, rapid cool or some other reasons, if these tensile stresses exceed the strength level that material can most bear, cracks will be developed. So UT inspectors shall have rich principle knowledge in angle probe testing, enough practice and skilled operation experience. In this passage, its introduces the principle and scanning pattern using ultrasonic testing method and how to characterization according its special echo.