Manufacturing Process
Manufacturing Process
From raw material to finished product, Fengwei controls every step of production in-house to ensure consistent quality.
Production Flow
1. Raw Material Selection
High-quality manganese steel and chrome alloy raw materials, sourced from certified suppliers. Chemical composition verified before use.
2. Melting
Medium frequency induction furnaces melt the raw material at 1450-1550°C. Spectrometer checks chemical composition in real-time.
3. Casting
Sand Mold Casting: Traditional sand mold process for large parts (up to 5 tons). Suitable for jaw plates, mill liners.
Lost Foam Casting: Precision lost foam process for complex geometries. Higher dimensional accuracy and smoother surface.
4. Heat Treatment
Water toughening treatment at 1050-1100°C improves wear resistance and toughness. Hardness is verified against the specified grade: HRC 22-30 for manganese steel grades (Mn13Cr2 to Mn22Cr2), HRC 50+ for Mn22Cr2+TiC, and HRC 58-62 for high chrome.
5. Machining
CNC machining for critical dimensions: bolt holes, seating surfaces, threads. Tolerance ±0.5mm or per drawing.
6. Inspection
- Chemical composition analysis (spectrometer)
- Hardness testing (HRC)
- Dimension inspection (CMM)
- Visual and surface defect check
7. Packing
Wooden cases or pallets, suitable for sea transport. Marked with product name, material, quantity, and PO number.
Production Capacity
| Item | Capacity |
|---|---|
| Annual Output | 10,000+ tons |
| Factory Area | 20,000+ sqm |
| Max Single Part | 5 tons |
| Melting Furnaces | 2 sets (1.5T + 3T) |
| Lead Time | 15-30 days (standard), 7-15 days (stock items) |
Manufacturing FAQ
Which casting process do you use, and which one suits my part?
Sand mold casting for large parts up to 5 tons, typically jaw plates and mill liners. Lost foam casting for complex geometries, where higher dimensional accuracy and a smoother surface are needed.
What melting and heat treatment temperatures do you run?
Melting is done in medium frequency induction furnaces at 1450-1550°C, with spectrometer checks on chemical composition in real time. Water toughening is performed at 1050-1100°C.
What is your annual capacity and lead time?
Annual output is 10,000+ tons from a 20,000+ sqm plant running two melting furnaces (1.5T and 3T). Lead time is 15-30 days for standard orders and 7-15 days for stock items.
What is the largest single part you can cast?
Up to 5 tons.
What machining tolerance can you hold?
±0.5mm on critical dimensions — bolt holes, seating surfaces and threads — or to your drawing.
How are parts packed for export?
Wooden cases or pallets suitable for sea transport, each marked with product name, material, quantity and PO number.
How is each part checked before it ships?
Chemical composition by spectrometer, hardness testing in HRC, dimension inspection on CMM, and a visual and surface defect check.