Galvanized steel pipes are often used in the manufacturing of critical components that demand exceptional wear resistance and crack resistance, despite their inherent properties such as high toughness, excellent bending, and welding capabilities. The thickness of the wear-resistant layer in alloy wear-resistant pipes varies, typically ranging from 3 to 120mm, resulting in different hardness levels.
Compared to ordinary alloy wear-resistant pipes or other materials, alloy wear-resistant steel pipes exhibit significantly higher wear resistance, far surpassing that achieved through spray welding and thermal spraying. The wear-resistant layer of these pipes is metallurgically bonded to the substrate, ensuring a strong bond strength.
Even under impact, the wear-resistant layer can absorb energy during the process, preventing detachment. This makes them suitable for applications involving intense vibrations and impacts, which is unattainable for cast wear-resistant materials and ceramic materials.
While the surface strength of ordinary galvanized steel pipes can be enhanced through heat treatment, surface carburizing, or nitriding, excessively high hardness in wear-resistant alloy pipes may lead to rapid spalling, adversely affecting wear resistance. Paradoxically, some softer materials may exhibit better wear resistance.
The wear resistance of alloy wear-resistant pipes primarily stems from their combination of hard particles and a soft matrix. During the wear process, any detached material integrates into the soft matrix, minimizing surface damage.
If the hardness of the pipe's matrix structure is also high, falling abrasives or other substances can grind against each other during movement, accelerating the destruction of the matrix structure. For galvanized steel pipes, hardness is just one parameter, with chemical composition also playing a crucial role. As a key indicator of pipeline performance, it deserves heightened attention.
