In the production process of excavator and bulldozer track links, various processes can ensure or enhance the quality of the chains. Here are some key processes:

Material Selection: The use of high-quality steel is fundamental to ensuring track links. For example, 35MnBN material is used for the link plates of bulldozer track links and is treated through quenching and tempering to improve its core performance.

Heat Treatment Process: Heat treatment is a critical step for increasing the hardness and wear resistance of the track links. For instance, the link plates undergo medium-frequency quenching to further enhance their wear resistance. Additionally, track links components typically undergo hardening and tempering to ensure proper mechanical properties. 

Precision Machining Technology: Precision machining technology ensures that the dimensions and fit of each track links component are highly accurate, which improves overall durability and stability. For example, all bushings, pins, and forged link plates are processed with precision to ensure tight and accurate assembly dimensions and sealing performance.

Lubrication Technology: Lubrication technology is also crucial in the production of track links. Lubricating the chains with oil reduces friction between the bushings and pins, allowing them to maintain superior wear resistance even in harsh working environments. Furthermore, regular lubrication can extend the lifespan of the chains.

Flaw Detection Process: The flaw detection process for the track links of excavators and bulldozers is an important step in ensuring chain quality. Flaw detection is primarily performed using magnetic particle testing. This non-destructive testing method applies magnetization to the surface of the components, creating a leakage magnetic field in the defect areas, which attracts magnetic particles to form visible magnetic indications that reveal internal or surface defects in the parts, such as cracks or inclusions.

Magnetic particle testing is a commonly used non-destructive testing method, where magnetization is applied to the surface of the parts followed by the application of magnetic particles. Observing the accumulation of particles at defect sites allows for the identification of cracks or other defects in the parts. This method can detect surface and near-surface defects, ensuring the safety and reliability of the equipment.

The role of magnetic particle testing is to ensure the quality and safety of the track links. Given the enormous loads that track links endure during use, even the smallest crack or defect can lead to severe mechanical failure or accidents. Therefore, magnetic particle testing can promptly detect and address these potential defects, extending the lifespan of the chains and ensuring the normal operation of the equipment as well as the safety of the operators.