Operating conditions: drilling mud, high content of abrasive particles, pH 3...7. The sliding work surface is in contact with the rubber seal. Working temperature 40-80 ° C, a pressure of 100-250 ATM.
Problems: wear of the working surface, bullies, scratches due to contact with abrasive particles, corrosion damage.
Solution: wear-resistant, anticorrosive coating WC/Co/Cr by high-speed spraying with a standard thickness of 0.25 +0.05 mm, followed by grinding and polishing. Hardness up to 72 HRC and porosity less than 1%. At wear of the working surface more than 0,5 mm the technology of restoration of the size of a detail with the subsequent drawing of a wear-resistant carbide covering of standard thickness is fulfilled.
The result: an increase in the operating time of the part under the conditions of circulation of salt-containing and acidic washing liquid to 1500-2000 hours. Multiple Maintainability of the applied coating with a maximum understatement of the working diameter up to 2.0 mm.
