The Shanxi Jianing Forging Forging Train Wheel, Mine Overhead Wheel, and Heavy-Duty Overhead Wheel Forging Project features mature forging technology for high-strength wheels, excellent load-bearing performance, and suitable for heavy-duty conditions in rail transit and mines.
A metallurgical transport vehicle factory in Qinhuangdao, Hebei, has long used traditional processes to produce wheel forgings. In actual operation, issues such as rapid wheel flange wear and tread fatigue cracks frequently occur, resulting in high vehicle maintenance costs and seriously affecting operational efficiency and equipment safety. The plant urgently needed a wheel forging solution with more stable overall performance and longer service life.
The original wheel forgings have the following key issues: First, the internal microstructure density of the material is insufficient, making it prone to early plastic deformation under heavy loads and high-impact conditions; Second, large deviations in heat treatment process control lead to significant fluctuations in hardness and toughness between different batches, making it difficult to achieve consistent service performance; Third, machining accuracy is too low, with excessive clearance between the hub and shaft, causing abnormal vibration and uneven wear, further shortening the replacement cycle of components. These pain points have led to lower overall truck attendance rates and increased spare parts inventory pressure.
To address these pain points, Jianing Forging has custom-developed specialized wheel forgings for customers. In terms of material selection, high-quality alloy steel is used with strict ingot profile design, combined with multi-directional forging technology, allowing metal flow lines to be reasonably distributed along the wheel flange, tread, and other force directions, thereby enhancing fatigue and wear resistance. Through precise heat treatment parameter control, each product achieves uniform hardness and moderate toughness, meeting safety margins under relatively high impact loads. At the same time, it introduces fine CNC machining and online inspection processes to keep key dimensional tolerances within ±0.08 mm, effectively improving assembly accuracy and dynamic balancing performance. The ultimately delivered wheel forgings underwent continuous operation verification at the customer's site, reducing wear rates by about 30% and extending the average service life of each batch by over 40%, helping the customer lower overall operating costs.
