White corrosion cracks in industrial gearboxes
Release date:
2022-04-22
Industrial gearboxes are widely used in the field of industrial equipment, including some extremely harsh working conditions. The continuous advancement of industrial gearbox technology has greatly improved industrial production efficiency and reduced operating costs. However, the impact of gearbox failures remains significant—for example, complete shutdowns, production losses, revenue losses, and even contract losses.
Industry Gearbox Widely used in the field of industrial equipment, including some extremely harsh working conditions. Industry Gearbox The continuous advancement of technology has greatly improved industrial production efficiency and reduced operating costs. However, the impact of gearbox failures remains significant—for example, complete shutdowns, production losses, revenue losses, and even contract losses. Bearings are one of the basic components of industry; their main function is to support the rotating shaft and ensure that the shaft remains in place while transmitting torque between gears. Bearings are a common failure point in gearbox malfunctions. Gearbox One of the basic components of industry; its main function is to support the rotating shaft and ensure that the shaft remains in place while transmitting torque between gears. Bearings are a common failure point in gearbox malfunctions.
White corrosion cracks not only appear in the automotive and wind power industries but also in cement crushers, compressors, paper machines, and cranes. Gearbox Even appearing in cleaning machines. Gearbox Although lower quality grades of steel are more prone to white corrosion cracks, the occurrence of white corrosion cracks is not limited to the type of steel, bearings, or heat treatment. Therefore, identifying the causes of white corrosion cracks and how to prevent their occurrence is a more challenging task.
Research on white corrosion cracks is ongoing. Currently, the basic consensus in the industry is that white corrosion cracks are formed by multiple factors acting together, including stress-related failures and environmental weakening factors. Due to pure mechanical loads in specific applications, stress-related failures occur when local stress exceeds material strength. High impact loads, sudden stress/tension, high-speed torque changes, high surface traction, and rapid acceleration or deceleration may promote the formation of white corrosion cracks.
Environmental weakening refers to bearing failures under low stress due to non-mechanical loads. For example, water corrosion, electrochemical corrosion, stray currents, friction pair corrosion, and some environmental factors that may generate hydrogen (which can adversely affect the strength of bearing materials) may promote the formation of white corrosion cracks.
Grease affects the formation of white corrosion cracks in water corrosion, friction pair corrosion, and environmental factors that may generate hydrogen. Currently, the relevant industries have conducted extensive work to explain this phenomenon with professional expertise and identify factors that may increase the likelihood of white corrosion cracks. Although there is no definitive solution to completely eliminate white corrosion cracks at present, some solutions currently in use (such as special alloys, black oxide coatings, and diamond-like carbon coatings) can reduce the formation of white corrosion cracks in rolling bearings to some extent.
If the formation of white corrosion cracks cannot be prevented immediately, at least their propagation should not be promoted. Industrial gear oil (Igo) can play an important role in these aspects. Using new additive technology with excellent bearing protection performance, tests related to white corrosion cracks in the rolling bearing industry have shown that under corresponding test conditions, the new additive technology does not promote the formation of white corrosion cracks.
In addition to not promoting the formation of white corrosion cracks, high-performance industrial gear oil additives must also meet the excellent performance requirements of original equipment manufacturers (OEMs) for new industrial Gearbox such as excellent micro-corrosion protection, wear protection, reliable water separation performance, and foam control.
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