Heat Treatment Process Overview
Heat treatment is a key process for improving tool steel performance. By controlling heating, soaking, and cooling processes, material hardness, toughness, and wear resistance can be significantly improved. Our proprietary heat treatment technology is the core competitive advantage ensuring excellent product performance.
Scientific Principles of Heat Treatment
Phase Transformation Mechanism
Steel undergoes phase transformations at different temperatures, which directly affect material mechanical properties:
- Austenitization: Formation of uniform austenite structure above critical temperature
- Martensitic Transformation: Rapid cooling forms high-hardness martensite
- Tempering Process: Controlled temperature tempering balances hardness and toughness
Key Control Parameters
- Heating temperature determines degree of austenitization
- Cooling rate affects microstructural transformation
- Tempering temperature controls final properties
Our Proprietary Heat Treatment Process
Multi-Stage Heating Technology
We employ multi-stage heating technology to ensure uniform material heating:
- Preheating Stage: Gradual heating to 500°C, eliminating internal stress
- Austenitization: Precise control at 850-900°C, ensuring complete austenitization
- Soaking: Maintaining stable temperature for uniform microstructure
Precision Cooling Control
Precise control of the cooling process is key to achieving ideal microstructure:
- Interrupted quenching technology to avoid cracking risk
- Controlled atmosphere protection preventing oxidation and decarburization
- Temperature gradient optimization ensuring uniform cooling
Quality Control System
Process Monitoring
- Temperature Monitoring: Multi-point temperature sensors for real-time monitoring
- Time Control: Precise process time management
- Atmosphere Control: Protective atmosphere composition monitoring
Performance Testing
- Hardness testing: HRC hardness detection
- Metallographic analysis: Microstructure observation
- Mechanical properties: Tensile and impact testing
- Fatigue testing: Cyclic load performance evaluation
Application Cases
SDS-Plus Drill Bit Heat Treatment
Process Features: Special heat treatment process for small diameter drill bits
Performance Improvement: 15% hardness increase, 30% longer service life
SDS-Max Heavy-Duty Drill Bits
Process Features: Uniform heat treatment technology for large cross-section drill bits
Performance Improvement: 20% toughness increase, significantly improved impact resistance
Conclusion
Our proprietary heat treatment process ensures excellent product performance and stable quality through precise temperature control, scientific process design, and strict quality management. Continuous technological innovation and process optimization enable us to provide customers with higher quality tool products, meeting ever-increasing market demands.
