In hardened steel machining, the high material hardness, significant residual stress, and concentrated cutting loads impose higher demands on tool stability. Compared to ordinary machining conditions, hardened steel is more likely to amplify deficiencies in tool material and cutting edge details.

From customer machining sites, common issues during the cutting process of hardened steel include chipping, fluctuating tool life, and poor machining consistency. Therefore, the core of selecting turning inserts for hardened steel lies not in single-cut performance, but in stability and controllability under long-term, batch processing conditions.

Unique Advantages of Berlt BTS6000-2 Series CBN Hard Turning Inserts

① From the Material Perspective: Selected high-quality, high-purity CBN powder ensures the cleanliness and quality of the raw material, guaranteeing that the insert maintains structural stability under high cutting temperatures without softening or structural failure.

· The insert does not fail prematurely due to thermal shock during continuous or intermittent cutting.

· It maintains stable cutting performance even when encountering hard spots or material inhomogeneity.

② From the Structural Perspective: Targeted optimization of the microstructure and bonding method of the CBN insert grade for hardened steel conditions reduces the probability of chipping.

· Enhances the overall toughness and density of the material.

· Reduces internal defects to avoid stress concentration.

· Ensures the insert resists chipping under high loads.

③ From the Cutting Edge Perspective: Addressing the issue of "usable but not user-friendly." The cutting edge is what truly determines machining stability for hardened steel.

· Insufficient edge strength → Chipping from the very beginning.

· Rough edge treatment → Gradual chipping during use.

· Poor edge consistency → Unstable batch processing.

Berlt CBN hard turning inserts undergo strict edge grinding and a 100% inspection system, ensuring every CBN insert completes "stability screening" before entering the market, making hardened steel machining more stable.

Case Study: Berlt BTS6000-2 Grade Machining Hardened Steel

The customer's workpiece is a gear component made of material 100CrMo7-3 with a hardness of HRC61, involving intermittent cutting—a typical scenario for intermittent turning of hardened steel. Using Berlt's BTS6000-2 grade CBN inserts, the tool life matched that of imported coated CBN inserts in actual customer site processing, with consistent stability performance, fully enabling import substitution.

Verified by actual measurement data, Berlt CBN hard turning inserts have fully achieved the effect of substituting imports, offering greater advantages in cost and service capability. If you have related application needs for CBN hard turning inserts, please contact our business manager for detailed technical documentation and trial cutting support.