Extensión de durabilidad de pistones de bombas de fractura hidráulica mediante el empleo de tecnología de nitruración por plasma y PVD

This paper presents the results obtained by replacing this technique for a new surface treatment using hardening by Plasma Nitriding. The layer obtained has a surface hardness of HV 1100 (Vickers hardness) versus HV 550 achievable with the technique replace, using a DIN 34CrAlNi7 steel as base material. Proposed treatment is supplemented with a second surface hardening treatment by the technique of PVD: Physical Vapor Deposition, which produces a monolayer coating of Al-Cr-N 5µm thick with a final hardness of HV 2500.

The hardening treatment described, was used to make a series of plungers for hydraulic fracturing, which were tested in a field technological test, supplemented with standardized laboratory tests on specimens that witnessed the manufacturing process. The plungers manufactured using the new technology proposed by YTEC has a durability which is 313% higher than those of Thermal Spray Technology.