MAROMA Technologies offers long-life ball-type closing elements and other items from new ceramic and metal materials (cermets) based on titanium carbide for application in the conditions of abrasive wear at temperatures up to 1000°C.
The manufacturing technology is based on the techniques of powder metallurgy.
The percentage of titanium carbide in cermets is between 50% and 75% by volume, the rest is nickel-based alloy or chromium-nickel steel. Depending on the composition, cermets have the hardness HRC 50-70, and they occupy intermediate position between ceramics and metals regarding the rest properties.
Ball-type closing elements made from cermets have much higher resistance to heat and mechanical shocks, as compared to their counterparts made from ceramics. They are resistant even to coarse abrasive particles and can be subjected to sanding with no loss in quality, as compared to their counterparts made from steels with cermet coatings. They are cheaper than their ceramic or metal counterparts, and of comparable quality.
Cermets are used in the manufacture of closing element units of ball-valves, regulating valve hats, valves, and pipeline fittings of various types with external dimensions up to 500mm; large-sized face and radial slider bearings; centrifugal pump impellers, etc.