Precision casting: laying a solid foundation for the quality of bucket teeth and wear-resistant plates in engineering machinery.

Raw Material Selection: Locking in Wear Resistance with Alloy Formulas

High-quality casting begins with meticulous control over raw materials. We have established a precise raw material ratio system to meet the needs of different working conditions: For bucket teeth subjected to high-intensity impacts, we use mainstream industry materials such as ZGMn13 high-manganese steel or 42CrMo alloy steel. The chromium content of high-chromium cast iron is consistently controlled at 18%-22%, achieving a hardness of HRC55-60 and an impact toughness ≥12J/cm² after heat treatment. For wear-resistant plates subjected to long-term wear, we select high-strength wear-resistant steels such as NM500, with a stable Brinell hardness of 470-540HBW. By adding alloying elements such as chromium, molybdenum, and niobium to form a chromium carbide hard phase, we improve wear resistance at the molecular level.

Before each batch of raw materials arrives, it undergoes spectral analysis to ensure that the alloy element content error is controlled within ±0.05%, preventing early wear and breakage caused by substandard materials from the source.

Process Control: Millimeter-Level Precision for Confident Adaptability

The core competitiveness of precision casting lies in its relentless pursuit of dimensional accuracy. We utilize MAGMA simulation software and 3D modeling technology to digitally optimize the mold structure, accurately simulating the temperature and stress field distribution during casting and proactively mitigating potential defects such as shrinkage cavities and cracks. Molds manufactured using 3D printing sand molding, combined with CNC machining equipment, ensure that the 3D coordinate deviation of the bucket teeth is controlled within ±0.5mm, and the installation hole spacing deviation is only ±0.15mm, fully complying with the ISO 2768-mK precision standard and perfectly adapting to the gear assembly requirements of mainstream models such as Sany and XCMG.

From precise temperature control at 1600℃ during furnace smelting to uniform filling speed during casting (stable filling speed at 0.8-1.2m/s), and then to the segmented slow cooling process (cooling rate controlled at 5-8℃/min), a digital process parameter library has been established for each step to ensure consistency in mass production.

Full-loop inspection: Multiple checks prevent defects from leaving the factory.

Harsh working conditions allow no room for quality defects. We have established a "three-tiered inspection defense" system to ensure product quality: The first tier is process inspection, using X-ray testing (RT) after sand molding to ensure that porosity defects are ≤Φ1.0mm; the second tier is non-destructive testing of finished products, using magnetic particle testing (MT) to detect surface cracks as wide as 0.01mm and ultrasonic testing (UT) to check for internal defects larger than Φ2mm; the third tier is performance sampling inspection, randomly selecting 3 samples from each batch for rubber wheel wear tests to ensure that the weight loss of bucket teeth wear is ≤0.15g/km, and that the wear resistance of the wear-resistant plate is 25-40 times that of ordinary steel plates.

User Value: Quality Upgrades Lead to Cost Optimization

For construction machinery users, the value of precision casting ultimately lies in optimizing operating costs. Taking mining operations as an example, our high-chromium cast iron bucket teeth have a service life of up to 3 months, more than 50% longer than traditional bucket teeth (45-60 days); the matching NM500 wear-resistant plates can extend the bucket maintenance cycle from 150 hours to 800 hours, reducing equipment failure frequency by 30%. Based on an average of 10 hours of operation per excavator per day, this translates to over 200 hours of reduced downtime for maintenance annually, resulting in a 25%-30% reduction in overall operating costs.

In the industry trend of "improving quality and efficiency" in construction machinery, precision casting is no longer a simple processing technique, but a core engine for quality upgrades. We consistently refine every process with meticulous craftsmanship and validate every performance aspect with data, providing global construction machinery users with "stable, durable, and cost-controllable" casting solutions, contributing to the industry's high-quality development.