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 mining truck machinery factory in Chenzhou, Hunan, has long been engaged in manufacturing mining transportation equipment. Its wheel forgings frequently suffer from fatigue cracking under heavy loads and harsh working conditions, seriously affecting equipment uptime and operating costs. To improve product reliability, the factory sought professional forging suppliers and ultimately reached a cooperation agreement with Jianing Forging to upgrade performance through customized wheel forging solutions.
Mining truck wheels endure continuous impact, high loads, and complex road conditions in mining environments. The original forgings have the following shortcomings:
1. Insufficient strength reserve: When downhill or making sharp turns under full load, cracks are likely to form at the connection between the spokes and rims;
2. Poor wear resistance: frequent contact with crushed stone and ore leads to early wear shortening replacement intervals;
3. Poor consistency: Large fluctuations in size and hardness between different batches of forgings affect assembly efficiency and overall balance;
4. Short service life: On average, it lasts only 3 months before needing replacement, increasing downtime and maintenance costs.
Jianing Forging addresses customer pain points and offers the following solutions:
1. Material Selection: Uses custom alloy steel (42CrMo + microalloying), processed through multiple forging passes and temperature-controlled cooling to obtain a fine grain structure, with tensile strength stabilized at ≥950MPa, about 20% higher than ordinary materials;
2. Structural Optimization: Finite element analysis optimizes spoke thickness and transition fillets to disperse stress concentration, increasing fatigue life by over 50%;
3. Precision forging: Uses closed die forging technology, controlling dimensional tolerances within ±0.5mm, reducing subsequent machining allowances and ensuring uniform hardness in each batch (HB280-320);
4. Strengthening treatment: After forging, quenching and tempering + surface shot peening strengthening, residual compressive stress on the surface improves wear resistance and resistance to fatigue cracking, extending actual service life to over 8 months.
