How does Manhart (Guangdong) CNC Machine Tool Co., Ltd. detect porosity in welded joints?

The following methods can usually be used to detect porosity in welded joints:
1. Visual inspection: This is one of the simplest and most commonly used methods. By directly observing the surface morphology of the weld seam, check for the presence of pores in the welded joint. This method is mainly suitable for detecting surface pores, but may not be accurate for internal pores.
2. * * Radiographic testing * *: Radiographic testing is a non-destructive testing method that can detect the internal structure and defects of welded joints. Commonly used rays include X-rays and γ Radiation. This method can accurately detect the pores in the weld, including their position, size, and quantity. However, radiographic inspection equipment is relatively expensive and the operation process requires certain professional skills.
3. Ultrasonic testing: Ultrasonic testing is also a non-destructive testing method that detects defects through the propagation and reflection of ultrasonic waves in welds. This method can detect various defects in welds, including pores, slag inclusions, cracks, etc. Ultrasonic inspection has a good detection effect on internal defects, but it may be affected by factors such as material properties and weld structure.
4. * * Liquid penetrant testing * *: This is a method of detecting defects by the characteristics of liquid penetrant penetrating the surface of welded joints. Liquid penetrant testing can accurately detect surface cracks, porosity and other defects in welded joints, with high sensitivity and reliability. In practical operation, liquid penetrant testing is widely used for welding inspection of various metal materials.
It should be noted that each of the above testing methods has its advantages, disadvantages, and applicability. The specific choice of method depends on factors such as the type of welded joint, material, defect type, and testing requirements. In practical applications, it may be necessary to consider and choose comprehensively based on specific circumstances.