Beryllization

Beryllization

 

the saturation of the surface of objects made from steel and sometimes other alloys with beryllium to prevent oxidation at temperatures up to 1100° C. In the outer zone of the beryllized layer the beryllides of various metals (iron, chromium, and others) and beryllium carbide (Be2C)—which increase the hardness and resistance to gaseous corrosion—are formed. Beryllization is carried out in powderlike mixtures or in gaseous mediums. For example, after four hours at 1050° C, a beryllized layer 0.15–0.20 mm thick and with a hardness HV = 14–15 giganewtons per sq m GN/m2; 1,400–1,500 kg force/mm2) is formed on Steel 10. Beryllization is used rarely, and only for critical heat-resistant alloys.

A. N. MINKEVICH

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