How to detect internal defects in automotive metal parts?

Date：2023-06-15 14:28:45 Views：612

During the manufacturing process of automotive metal parts, internal defects may occur due to process or material quality issues. These defects may cause problems with the parts during use, such as breakage, wear, water leakage, etc., seriously affecting the safety and reliability of the car. Therefore, how to effectively detect internal defects in automotive metal parts has become an important issue.

At present, commonly used methods for detecting internal defects in automotive metal parts include ultrasonic testing, magnetic memory testing, X-ray testing, etc.

Ultrasonic testing is a non-contact testing method that can detect internal defects through phenomena such as ultrasonic propagation speed, reflection, and attenuation in objects. This method is suitable for detecting internal defects in metal parts, especially some minor defects. Ultrasonic testing can detect issues such as wall thickness, roundness, and surface quality of parts, and can calculate the area and depth of defects. However, ultrasonic testing requires coupling agents on the parts, which is relatively cumbersome to operate and the detection speed is slow.

Magnetic memory detection is a detection method based on magnetic memory effect. When the magnetic field changes, magnetic memory materials in metal parts will remember the changes in the magnetic field, forming a magnetic signal. By detecting the size and phase of the magnetic signal, it is possible to determine whether there are defects inside the part. Magnetic memory testing is suitable for detecting wall thickness, roundness, surface quality and other issues of metal parts, and can quickly detect a large number of parts. However, magnetic memory testing requires magnetic field treatment of the parts, which requires high magnetic field requirements, making it relatively cumbersome to operate.

X-ray testing is a contact detection method that can detect internal defects in parts through X-ray transmission. This method can detect issues such as wall thickness, roundness, and surface quality of parts, and can calculate the area and depth of defects. However, X-ray testing requires radiation treatment of the parts, which has a certain impact on the operator's physical health, and the test results require professional interpretation.

In summary, ultrasonic testing, magnetic memory testing, and X-ray testing are all effective methods for detecting internal defects in automotive metal parts. However, they each have their own advantages and disadvantages and need to be selected and used according to specific circumstances. In order to maximize the safety and reliability of automobiles, it is necessary to comprehensively consider factors such as the material, size, defect size, and location of the parts when selecting testing methods.

The above is the relevant content of "Internal Defect Detection of Automotive Metal Parts" brought about by this core detection. We hope it can be helpful to everyone, and we will bring more exciting content in the future. The company's testing services cover various testing projects, including electronic component testing and verification, IC authenticity identification, product design and material selection, failure analysis, functional testing, factory incoming material inspection, and tape weaving. Welcome to call Chuangxin Testing, we will be happy to serve you.