Structure and Properties of Surface Layers Obtained by Atmospheric Electron Beam Cladding of Graphite-Titanium Powder Mixture onto Titanium Substrate

Abstract:

The cladding of titanium and graphite powders on the cp-titanium workpieces using the electron beam injected to the atmosphere provided the formation of the surface layers with a high content of high-strength carbide particles. The main structural components in cladded layers are α-Ti (αʹ-Ti), titanium carbide and graphite. Electron beam current is the main technological parameter defining a thickness of the hardened layer. An increasing beam current ranged from 20 to 23 mA leads to the cladded layer growth up to 2.9 mm. However, in this case a significant decrease of the microhardness level and the wear resistance level of the cladded layer is not observed. An average microhardess value of the hardened layer is of 430 HV. Under the conditions of friction against fixed abrasive particles, a wear resistance level of the cladded layers is by 32-45 % larger than that of cp-titanium.

• Periodical: Advanced Materials Research (Volume 1040)
• Pages: 784-789
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1040.784
• Online since: September 2014
• Authors: Olga G. Lenivtseva*, Evgeniy Golovin, Vitaliy V. Samoylenko, Daria Mul, Dmitriy Golovin
• Keywords: Electron Beam Cladding, Microhardness, Titanium, Titanium Carbide, Wear Resistance

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