金属检测法在火电厂检修中的应用

Application of Metal Detection in Thermal Power Plant Maintenance

为防止压力容器及承压管道因材料性能不足而给火电厂的安全运行带来隐患,介绍了常用的裂纹无损探伤检测方法、现场金相检测法、壁厚检测法、硬度检测法等金属检测方法;对磁粉检测法、渗透检测法、超声检测法、X射线检测法的原理、适用范围、使用步骤进行了详述;以某П型锅炉机组的中修为例,阐述了各种检测方法的选取和检测点的选择,展示了部分检测照片,并对裂纹检测结果给出了处理意见和方法,以更好地服务于机组的安全运行。

In order to prevent the hidden danger brought from the lack of material properties of pressure vessel and pressure piping,some commonly used metal testing methods： cracks nondestructive testing（NDT）method,on-site metallographic testing method,thickness testing method,hardness testing method and so on are introduced.It also describe magnetic particle testing method,penetration testing method,ultrasonic testing method,and the principle,the applicable scope and the steps of X-ray testing method.In the meanwhile,with the example of the medium repair of π-type furnace units,it describes the selection of each testing method and test point,shows part of the test photos,and provides advises and treatments for a safer operation of unit.