What are the non-destructive testing methods for welds?

Date：2023-04-07 15:21:16Views：569

The purpose of welding is to create a strong connection, making two metal parts look like a whole. Welding seam is a commonly used connection method in industrial production, but the quality of welding has a significant impact on the performance and safety of industrial products. Therefore, non-destructive testing of the weld seam is necessary during the welding process to ensure that its quality meets the requirements. This article will introduce which non-destructive testing methods for welds include.

Visual inspection methods

Visual inspection method is a simple and intuitive non-destructive testing method for welds. It usually uses the naked eye or microscope to inspect defects, cracks, and pores on the surface of weld seams. Visual inspection methods are suitable for detecting small welding components and surface defects, but they cannot detect defects inside the weld seam.

Magnetic Particle Testing Method

Magnetic particle testing is a method of detecting internal defects in welds using a magnetic field. Under the action of a magnetic field, magnetic particles will concentrate on the surface of the weld and form some magnetic particles flowing along cracks on the weld, thus forming obvious magnetic particle defect marks. This method can detect defects such as cracks and pores inside the weld seam.

Ultrasonic testing methods

The ultrasonic testing method utilizes the principle of ultrasonic propagation in materials to analyze the physical phenomena such as reflection, refraction, and scattering of ultrasonic waves inside the weld seam and detect the quality of the weld seam. It can detect internal and surface defects in welds, and can measure parameters such as thickness and depth of welds.

Radiographic testing methods

Radiographic testing method is a method that utilizes the principle of X-ray or gamma rays passing through welds to detect internal defects in welds. It can detect internal defects in welds, such as cracks, pores, inclusions, etc. But this method has high costs and radiation hazards, requiring professional operation and safety protection.

In summary, non-destructive testing methods for welds include various methods such as visual inspection, magnetic particle testing, ultrasonic testing, and radiographic testing. In actual production, appropriate testing methods should be selected based on different types of welds and application requirements to ensure the quality and safety of welds. Chuangxin Testing is a professional testing institution for electronic components. Currently, it mainly provides integrated circuit testing services such as capacitors, resistors, connectors, MCU, CPLD, FPGA, DSP, etc. Specializing in functional testing of electronic components, appearance testing of incoming electronic components, anatomical testing of electronic components, acetone testing, X-ray scanning testing of electronic components, and ROHS composition analysis testing. Welcome to call, we will be happy to serve you!