Glossary

What are transonic airfoils, and what is the active clearance control? Check out our technical dictionary and find out more about engine technology terms – from active clearance control to velocity triangle.

Cadmium-plating Can-annular combustion chamber Can-type combustion chamber Cascade axis Cascade front Cascade normal Cascade spacing Case-hardening CBN hardfacing of blade tips Ceramic Coating Ceramics CFRP structures Chemical conversion Chromate treatment of aluminum

Chromate treatment of magnesium Chromic acid anodizing CLEAN Cleaning Columnar crystal Combustion chamber Component efficiency Compressor Control system Cooling air holes Copper-plating Crack inspection Critical Mach No.

Case-hardening

(at 900 - 950 °C)
Case-hardening serves to produce a hard, wear-resistant surface layer on tough steel materials. At the same time, residual stresses are induced that favorably affect the vibration behavior of the component. These properties are indispensable for gears, ball and roller bearings. In the case-hardening process the surfaces are first carburized, i.e. the boundary layer is enriched with carbon, and then hardened. The surface hardness of case-hardened components is considerably higher than the core hardness.