ST-4 Nano burnishing tool for hardening steel

Ultra precision Nano Diamond burnishing tool Sensor-Tool ST-4

The tool is used for making a nanostructured layer on the surface of steel, stainless steel, cast iron, alloys workparts
Workpart shapes - cylinder, body of rotation, plain body.
Workpiece diameter up to 100 mm (if larger diameter can be customized)

Toolholders with round shafts diameters 20, 25, 32 (can be customized )
Indenter materials: Natural diamond (ND), synthetic diamond (PCD), and ultrafine-grained cubic boron nitride (DBN)

The tool is used for finishing, finishing and strengthening and nanostructuring burnishing operations
You can reset the loading for other technical processes using a dynamometric device (purchased separately), or we can adjust loading for your single workpiece.  High-precision diamond tools.
The tool completely replaces the grinding and polishing area.
At finishing and finishing-hardening processing, achieved roughness up to Ra = 0.05 um; 
for nanostructuring burnishing - up to  Ra = 0.05 um.

Microhardness of the surface layer is 1.3 ... 2 times higher than initial state.
The tool is  used on CNC machines and universal machines capable of finishing turning.
A machine is required with the possibility of supplying coolant  under pressure > 10 Bar through the central hole in the holder.

Baublies, cogsdill, yamasa tool, ecoroll tool, sugino, zeus, elliott tool, 

Properties of the nanostructured surface.
Very good bone growth to the nanostructured material.
Nanostructuring gives very high hardness combined with increased elasticity.
The hardness of the file and the elasticity of the rubber.
The elasticity is ensured by the fine grain. The surface treated with ST-4, ST-5 performs well in tribocouplings, takes the shape of the recipient part.
It is not brittle like other superhard coatings.

Hardening of the material in the thin surface layer of steels is carried out by forming a nanocrystalline structure with grain sizes less than 100 nm. By controlling the friction force of the tool indenter and the development of intense plastic shear deformation.

During dry machining of submersible oil pump heel, a nanostructured layer with thickness of 8...12 µm is formed from structural cemented steel 20X (HRC 55...65) by means of ST 5 type tool with indenter with microhardness up to HV0.025 1500...1600 (after finishing turning HV0.025 825...845).

Hit indentation hardness reaches 13 GPa, which is comparable to the hardness of coatings.
Residual stresses reach 1950 MPa and a microprofile with Ra = 3.2...60 nm is formed.

To maintain the allowable contact temperature and increase tool life, the indenter is cooled by the turbulent flow of the machine's coolant. Nanostructural surface hardening of submersible pump heel type parts provides 3.2 times reduction of surface wear intensity in abrasive environment conditions

surface plastic strain hardening