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FORGE-R
ETERNAL
Why Choose H13?
In the field of scrap steel crushing, the working environment is usually characterized by high impact, high wear, and even high temperatures.
Core Chemical composition
| C | 0.32-0.45% | Ensure hardness and strength |
| Si | 0.8-1.2% | Strengthen the matrix, heat fatigue resistance |
| Mn | 0.2-0.5% | Deoxidation and improvement of hardenability |
| Cr | 4.75-5.5% | Hardenability, high temperature oxidation resistance, wear resistance |
| Mo | 1.1-1.75% | High temperature strength, resistance to tempering softening |
| V | 0.8-1.2% | Refine grain size, wear resistance, and heat cracking resistance |
| P/S | ≤0.03% | Impurities, strict control of brittleness |
Red Hardness
H13 can maintain high hardness and wear resistance at around 600°C, making it suitable for crushing rolls and hammer heads under high-speed impact.
Toughness
Compared with cemented carbide or high-chromium cast iron, forged H13 offers better toughness. It can resist impacts from large irregular metals in scrap steel and avoid chipping or fracture.Density: Forging improves material density and eliminates potential internal micro‑cracks.
Production Procedure
Raw Material & Smelting
Preferred electroslag remelting (ESR) H13 ingot to reduce inclusions and segregation;
Secondary refining + vacuum degassing to ensure uniform chemical composition.
Forging Process
Preheating: holding at 800–900°C to prevent internal cracks caused by poor thermal conductivity;
Initial forging: 1065–1120°C; final forging temperature ≥850°C, overburning strictly prohibited;
Multi‑pass upsetting and drawing with total forging ratio ≥4 (≥5 for large roll diameters) to break up carbides and form continuous metal flow lines;
Mandatory slow cooling after forging (pit cooling / furnace cooling), followed by prompt normalizing + high‑temperature tempering to eliminate residual stress.
Heat Treatment
Two‑stage preheating → austenitizing at 1020–1050°C → marquenching → double tempering at approx. 560°C (≥2 h each) to stabilize microstructure and hardness;
Cryogenic treatment optional to further reduce retained austenite.
Surface Strengthening
Roll surface: hardfacing with tungsten carbide (WC) / high‑chromium alloy, laser cladding, nitriding / nitrocarburizing;
High‑precision grinding, controlling coaxiality, cylindricity and runout to meet assembly and meshing clearance requirements.
Heat Treatment Process
Conventional Process
Vacuum quenching + multiple tempering is typically adopted.
Hardness Selection
For light scrap steel (thin-gauge scrap, automotive shells):
Hardness is usually controlled at HRC 48–52, balancing wear resistance and toughness.
For cast scrap, high-hardness scrap steel:
Toughness is prioritized, so hardness is appropriately reduced to HRC 45–48.
Surface Treatment
Some high-end crushing rolls, after forging and heat treatment, are applied with a surface hardfacing layer or laser cladding (e.g., tungsten carbide cladding). This greatly improves surface wear resistance by several times while maintaining the toughness of the base material.
Application
Heavy duty scrap steel crusher and double shaft shredder are used to process hard metals such as automotive dismantling materials, steel sections, steel plate scraps, and industrial scrap iron, especially suitable for continuous and high load crushing operations.
Why Choose H13?
In the field of scrap steel crushing, the working environment is usually characterized by high impact, high wear, and even high temperatures.
Core Chemical composition
| C | 0.32-0.45% | Ensure hardness and strength |
| Si | 0.8-1.2% | Strengthen the matrix, heat fatigue resistance |
| Mn | 0.2-0.5% | Deoxidation and improvement of hardenability |
| Cr | 4.75-5.5% | Hardenability, high temperature oxidation resistance, wear resistance |
| Mo | 1.1-1.75% | High temperature strength, resistance to tempering softening |
| V | 0.8-1.2% | Refine grain size, wear resistance, and heat cracking resistance |
| P/S | ≤0.03% | Impurities, strict control of brittleness |
Red Hardness
H13 can maintain high hardness and wear resistance at around 600°C, making it suitable for crushing rolls and hammer heads under high-speed impact.
Toughness
Compared with cemented carbide or high-chromium cast iron, forged H13 offers better toughness. It can resist impacts from large irregular metals in scrap steel and avoid chipping or fracture.Density: Forging improves material density and eliminates potential internal micro‑cracks.
Production Procedure
Raw Material & Smelting
Preferred electroslag remelting (ESR) H13 ingot to reduce inclusions and segregation;
Secondary refining + vacuum degassing to ensure uniform chemical composition.
Forging Process
Preheating: holding at 800–900°C to prevent internal cracks caused by poor thermal conductivity;
Initial forging: 1065–1120°C; final forging temperature ≥850°C, overburning strictly prohibited;
Multi‑pass upsetting and drawing with total forging ratio ≥4 (≥5 for large roll diameters) to break up carbides and form continuous metal flow lines;
Mandatory slow cooling after forging (pit cooling / furnace cooling), followed by prompt normalizing + high‑temperature tempering to eliminate residual stress.
Heat Treatment
Two‑stage preheating → austenitizing at 1020–1050°C → marquenching → double tempering at approx. 560°C (≥2 h each) to stabilize microstructure and hardness;
Cryogenic treatment optional to further reduce retained austenite.
Surface Strengthening
Roll surface: hardfacing with tungsten carbide (WC) / high‑chromium alloy, laser cladding, nitriding / nitrocarburizing;
High‑precision grinding, controlling coaxiality, cylindricity and runout to meet assembly and meshing clearance requirements.
Heat Treatment Process
Conventional Process
Vacuum quenching + multiple tempering is typically adopted.
Hardness Selection
For light scrap steel (thin-gauge scrap, automotive shells):
Hardness is usually controlled at HRC 48–52, balancing wear resistance and toughness.
For cast scrap, high-hardness scrap steel:
Toughness is prioritized, so hardness is appropriately reduced to HRC 45–48.
Surface Treatment
Some high-end crushing rolls, after forging and heat treatment, are applied with a surface hardfacing layer or laser cladding (e.g., tungsten carbide cladding). This greatly improves surface wear resistance by several times while maintaining the toughness of the base material.
Application
Heavy duty scrap steel crusher and double shaft shredder are used to process hard metals such as automotive dismantling materials, steel sections, steel plate scraps, and industrial scrap iron, especially suitable for continuous and high load crushing operations.
