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What are ultrasonic testing and dye penetrant testing in titanium material processing?

Flaw detection is an essential process in titanium material processing. As long as the finished product leaves the factory, it will undergo testing. To prevent internal defects in titanium materials, different levels of testing are required according to customer requirements and product standards:

The most commonly used method currently is ultrasonic testing.

Ultrasonic testing is a detection method based on sound waves, which can detect internal defects in welded parts, such as pores, cracks, inclusions, and pores. The principle of ultrasonic testing is to use the propagation speed and reflection mode of ultrasonic waves in different materials to detect defects. By measuring the relative change signal and amplitude, ultrasonic testing can be used to measure the size defects or attenuation of materials or welds.

Dye penetrant testing is a visual based detection method suitable for detecting surface defects such as cracks, inclusions, and burrs.

Spray penetrant evenly on the welding surface, penetrate for 10-15 minutes, and clean off the penetrant. Then use the developer to apply it thinly and evenly, and wait for 7-10 minutes. The white light intensity should be greater than 1000Lx to identify defects through visual or microscopic observation.

2、 Comparison of advantages and disadvantages between dye penetrant testing and ultrasonic testing

1. Disadvantages of dye penetrant testing

The dye penetrant inspection operation is quite cumbersome and can only detect surface defects, making it impossible to detect deep defects.

2. Advantages and disadvantages of ultrasonic testing

Ultrasonic testing can detect internal defects in welded components with higher accuracy, depth, and reliability. However, ultrasonic testing requires professional technicians and expensive equipment, resulting in higher costs.

3、 Summary

In the production process of titanium materials, both dye penetrant testing and ultrasonic testing are common non-destructive testing methods. Dye penetrant testing mainly detects surface cracks and burrs, while ultrasonic testing can detect welding defects

Connected to internal high-precision defects, it has higher accuracy, depth, and reliability. In practical applications, suitable testing methods can be selected according to the situation to ensure that the product meets customer requirements.

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