急冷换热器管座角焊缝相控阵超声检测研究

TESTING RESEARCH ON PHASED ARRAY ULTRASONIC OF FILLET WELD OF RAPID-COOLING HEAT EXCHANGER

急冷换热器管座角焊缝的质量对相关设备的安全稳定运行具有重要的意义。但是,现行标准中的无损检测方法无法有效的检测该焊缝内部的缺陷,提出将相控阵超声检测方法应用于急冷换热器管座角焊缝。根据某一急冷换热器中集箱管座角焊缝的规格及形状,制作了用于验证相控阵超声检测系统的模拟试样。首先经过在软件上的模拟仿真,确定了探头的规格及放置位置,最终通过检测模拟试样上的人工缺陷验证了相控阵超声检测应用于急冷换热器管座角焊缝的可行性。

It is important for related equipment in the safe and stable performance that the integrality quality of the fillet welds of rapid-cooling heat exchanger. However,a few defects of the weld can ＇t be detected effectively based on the nondestructive testing methods of existing standard. This paper provides a measurable method for testing fillet weld of rapid-cooling heat exchanger which is phased array ultrasonic testing technique. A simulation block is made for validating the phased array ultrasonic testing system,which is according to the size and shape of a fillet weld on headers of rapid-cooling heat exchanger.Firstly,the size and placement of the probe is determined by simulating on software. Finally,the practicability of phased array ultrasonic testing on fillet weld of rapid-cooling heat exchanger is proved by testing artificial defects on simulation block.