How to Selecting CNC Inserts for Hard Steel Machining
In the field of mechanical machining, processing hard steel materials (such as hardened steel and high-hardness steel) has always been a technical challenge. These materials feature high hardness and strength, placing extreme demands on cutting tools. This article will use CD Carbide's CD2025H series inserts as an example to provide a selection guide for hard steel machining tools, covering four aspects: material properties, chip breaker technology, grade applications, and real-world case studies.
1. Insert Material: The Perfect Combination of High-Performance Substrate and Advanced Coating
The core competitiveness of CD2025H inserts lies first in their material technology:
High-Hardness Cemented Carbide Substrate: Made from selected nano-level high-performance tungsten carbide, it combines high hardness and high strength, providing a solid foundation for machining hard steel.
Advanced PVD Coating Technology:
Multi-layer composite + nano-composite structure design
Excellent impact resistance and crack resistance
Utilizes AITIN's AIP technology for strong coating adhesion
This material combination makes OPH120 particularly suitable for machining high-hardness materials like SKD11 tool steel at 45-60HRC, as mentioned in the case study.
2.Chip Breaker Technology: Precision-Engineered Cutting Performance
The OH series chip breaker technology provides CD2025H inserts with outstanding cutting performance:
3. Grade Application: Precise Matching to Machining Needs
According to ISO standards, the application characteristics of CD2025H are as follows:
Key Features:
High hardness and wear resistance
Suitable for high-hardness materials up to 45-60HRC
Wide recommended cutting speed range (30-80 m/min), adjustable based on specific conditions
4. Real-World Application Case: Validating Product Performance
A typical application case:
5. Selection Recommendations and Summary
Based on the above analysis, the following factors should be considered when selecting inserts for hard steel machining:
Material Compatibility: Ensure the workpiece material hardness falls within the insert's applicable range (e.g., OPH120 is suitable for 45-60HRC).
Machining Type: Finishing or semi-finishing? CD2025H is particularly suitable for finishing to semi-finishing.
Insert Shape: Choose the appropriate shape based on the machining location (e.g., WNMG08 for external turning).
Cutting Parameters:
Cutting speed: Generally select lower speeds for hard steel machining (30-80 m/min).
Feed rate: Choose smaller feeds for finishing (0.05-0.25 mm/rev).
Cutting depth: Select smaller depths for finishing (0.15-0.3 mm).
Economic Efficiency: Although high-performance inserts may have a higher unit cost, extending tool life can reduce per-part costs.
The CD2025H series inserts, with their advanced coating technology, high-hardness substrate, and optimized chip breaker design, provide a reliable solution for hard steel machining. For actual selection, trial cutting is recommended to adjust parameters based on specific machining results for optimal economic efficiency.
Through scientific selection and proper use, machining efficiency and quality for hard steel can be significantly improved, production costs reduced, and greater value created for manufacturing enterprises.
