In the global mining and aggregate industry, the service life of crusher wear parts depends not only on material grade, but also on the precision and stability of the manufacturing process. As an ISO9001-certified foundry and the direct manufacturer behind Duma's Sandvik-compatible crusher parts, we have accumulated over 15 years of field data and engineering experience. This article explains how Duma's 9-step process control improves the wear life of mantles, concaves, and other critical components by 20–50%, helping customers achieve lower operational costs and higher reliability.
1. Technical Drawing Interpretation – Ensuring Global Compatibility
Duma's engineering team evaluates and converts customer drawings according to international standards (ISO 10222, ASTM specifications). This avoids micro dimensional deviations that often cause poor chamber fit and accelerated liner wear.
Why it matters:
Accurate dimensional control reduces unexpected wear patterns and maintains consistent crushing performance.
2. Prototype and Simulation – Reducing Failure Risks Before Casting
We use FEM simulation and solidification modeling to evaluate stress distribution and shrinkage zones for Sandvik-type mantles and concaves. This ensures structural integrity before any mold is produced.
Benefit:
Shortens development cycle and ensures higher stability for new chamber profiles.
3. Heat Treatment Control – Core of Wear Resistance
As a direct manufacturer, Duma operates its own solution heat treatment facility. Different manganese steels (Mn13Cr2, Mn18Cr2, Mn22Cr2) follow precise temperature curves and quenching parameters.
Why this step is critical:
Incorrect cooling rates are the #1 cause of early liner failure in the industry.
Duma maintains full traceability for all heat treatment batches.
4. Mold Engineering – Precision at the Foundation
Duma develops both steel and wooden molds depending on production volume.
Steel molds ensure dimensional stability for high-volume Sandvik CH/CS series liners.
5. Raw Material Certification – Ensuring Alloy Purity
All incoming materials undergo spectrometer testing before melting. Strict limits on sulfur, phosphorus, and carbon equivalent guarantee stable mechanical performance.
6. Controlled Bottom-Pour Casting – Reducing Inclusions
Compared with traditional top-pour casting, Duma's bottom-pour system reduces turbulence, gas entrapment, and oxidation, resulting in cleaner internal structure and longer wear life.
7. Stress Relief and Quality Inspection
After casting, all parts go through controlled annealing and non-destructive testing (UT, hardness profiling, and metallography). This ensures the parts meet the mechanical requirements for Sandvik crusher applications.
8. CNC Machining – Achieving Tight Dimensional Accuracy
Critical surfaces are machined using CNC centers to ensure perfect fitment with Sandvik crushers. Surface roughness and tolerance are controlled to OEM-level standards.
9. Full Traceability and Documentation
Each part is laser-marked with a unique batch code linking it to raw material records, heat treatment curves, and inspection reports-meeting ISO9001:2015 traceability requirements.
Why This Matters for Sandvik-Compatible Spare Parts
Duma is not a reseller-we are a global manufacturer with:
- 47,000+ m² factory
- 4,000+ existing patterns
- tens of thousands of tons annual casting capacity
- ISO9001-certified process
This ensures higher reliability, longer wear life, and complete control over the entire manufacturing chain.
