How Alloy Powder for Diamond Tools Solves Chipping in Sintered Slab Cutting

Slab chipping during cutting is a long‑standing pain point in the stone‑processing industry. Many diamond‑tool manufacturers are searching for qualified alloy powder raw materials to improve cutting‑edge quality and operational stability of slab cutting blades.

Sintered slabs contain quartz and feldspar minerals with Mohs hardness of 6‑7. Produced under high‑temperature and high‑pressure sintering, slabs feature glass‑glaze characteristics with poor impact resistance. Their water absorption is ≤0.02%, with no glaze‑layer separation across the whole body. As typical hard‑brittle workpieces, slabs set strict requirements for the matrix performance of diamond tools.

For cutting hard‑brittle materials, the matrix must combine good self‑sharpening performance, red hardness and strong diamond retention. The matrix wear rate needs to dynamically match the protrusion height of diamond grits, so as to avoid defects such as edge chipping, sparking and rough cutting surfaces. Sagwell KIN‑03 Alloy Powder for diamond tools was originally applied to ceramic cutting segments. It delivers three major advantages: excellent red hardness to maintain stable properties under high‑temperature cutting; controllable self‑sharpening effect to realize ideal balance between matrix abrasion and diamond protrusion; powerful retention force to firmly lock diamond grits and prevent premature grit loss.

Considering material differences between sintered slabs and ceramic tiles, our technical team recommends adopting KIN‑03 alloy powder as the main matrix component, with optimized Copper‑tin additions. This adjustment improves matrix hardness and bending strength, strengthens bonding between matrix and diamond particles, and optimizes heat dissipation during cutting. In customer field tests on 800×15 mm slabs, cutting finished within around one minute with smooth operation and no sparking. Clean cutting surfaces were obtained, and chipping was greatly reduced.

Two core principles help eliminate slab‑cutting chipping: select qualified alloy powder for diamond tools with outstanding red hardness and self‑sharpening properties; tune formulas to balance matrix hardness and toughness. Proper alloy‑powder selection plus rational formula design are essential for higher finished‑product yield of slab saw blades, delivering reliable material solutions for diamond‑tool producers worldwide.