Carborundum Abrasives has launched a new high-tech bond system specially formulated for creep feed grinding in the aerospace industry.
The new vitrified bond, code-named VXSTAL, is designed to give controlled release of grains in flat wear during the grinding process.
VXSTAL facilitates high stock removal, an essential element of turbine blade production, while the wheel maintains its shape for much longer. By substantially reducing dressing frequency, the specifier benefits from maximum wheel life and increased productivity. The new wheel comes in a range of grit sizes and dimensions and is distinctive for its mint-green appearance.
As the name implies, the bond relies on a crystalline post within its matrix. The crystalline post is controlled by special bond chemistry under controlled process conditions.
The chemistry on the bond permits nucleation and growth of dendritic crystal structures within the bond posts of the individual grains of the grinding wheel. These crystals have a low expansion coefficient which locally raises the residual stress within the bond post during the cooling process after firing.
The residual stress so created enables the bond to release the grains at predetermined stress levels. This enables the grinding wheel to continue working at optimum efficiency.
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