Lead plate has a more important application in industry, but the large area of lead plate is usually connected by welding and other ways, this article will summarize the detection method of the weld produced by lead plate welding.

1. Inspection and inspection

In the propagation of metal and other uniform media, the interface of different media will produce reflection, so it can be used for the detection of internal defects. It can detect any welding material and any part of the defect, can sensitively find the location of the defect, but it is difficult to determine the nature of the defect, shape and size. For this reason, flaw detection is often used in conjunction with radiographic examination.

2. X-ray flaw detection

X-ray detection is a method of detection that uses the properties of ray penetration and decay in a substance to find defects. According to the different rays used in the detection, it can be divided into X-ray detection and gamma ray detection.

Due to the different methods of showing defects, each X-ray flaw detection is divided into ionization method, fluorescent screen observation method, photography method and industrial television method. X-ray inspection is mainly used to check cracks, incomplete penetration, porosity, slag inclusion and other defects. Inside the weld.

3. Penetration inspection

Penetrant testing is the use of physical properties such as permeability of certain liquids to find and show defects, including color testing and fluorescence penetrant testing, which can be used to check for defects on the surface of ferromagnetic and non-ferromagnetic materials.

4. Magnetic test

Magnetic inspection can only find defects on and near the surface of magnetic metal, and can only conduct quantitative analysis of defects. The nature and depth of defects can only be estimated based on experience.

Magnetic inspection is to find defects by magnetic leakage caused by magnetization of ferromagnetic metal parts in magnetic field. According to the different methods of magnetic leakage measurement, it can be divided into magnetic particle method, magnetic induction method and magnetic recording method, among which magnetic particle method is widely used.