广州新客站大型铸钢件超声波探伤方法浅析

摘要

铸钢件铸造表面粗糙,导致声耦合不良,造成散乱反射,形成干扰杂波,使超声波探伤变得困难,本文探讨用工件底波法调整探伤灵敏度,比较在不同加工面测得的回波声压（实测耦合补偿值）,在实际检测工件时进行耦合补偿,便利在现场探伤条件下,针对工件厚度及表面状况的变化作出及时的修整,保证探伤结果的准确、可靠。%When the surface of steel castings is roughness, it will lead to poor acoustic coupling, causing scattered reflection, interference noise and a worse ultrasonic testing. This article compares the different echo pressure between different processing surfaces which are adjusted by the sensitivity of flaw detection under the bottom wave method. In an actual measurement, using a coupling compensation can make the testing become more convenience. According to the thickness of the piece and the changed surface condition, the operator can fix timely to ensure the testing results are accurate and reliable.