At present, in the process of fine hardening steel, due to the small amount of machining allowance, the common CBN tools is a compound tool (as shown below), that is, the cutting edge and the body are not the same material, only the cutting edge is a CBN material. And the compound tools can only process hardened steel parts with a machining allowance of <0.5mm.

For the hardened steel parts with large deformation amount after heat treatment, it is more suitable to choose the solid CBN tools (as shown below). The solid CBN tool belongs to the whole body and is a material - CBN. Halnn is the first proposed " solid CBN tools" for roughing in China, especially in the field of hardened steel and intermittent cutting.

Halnn has been developing CBN tools for high hardness cutting and high speed cutting. Currently, Halnn CBN tools are widely used in high hardness materials, high hardness workpieces after heat treatment, and other difficult-to-cut materials. With long-term technical strength and state-of-the-art technology development capabilities, Halnn provides our customers with high-quality, high-performance tooling products that can quickly meet increasingly diverse needs. Halnn developed a series of CBN tool grades for the characteristics of hardened steel and the problems of conventional tool turning hardened steel, making turning hardened steel no longer a problem.

Case of Halnn BN-H05 CBN tool hard turning gear(hardened steel) after heat treatment

In addition to the compound CBN tool and the solid CBN tool for hard turning hardened steel, Halnn also has a coated CBN tool.