Surface Modification of Cobalt Chrome Molybdenum Cast Alloy by Electron Beam Irradiation

Takekazu Nagae; Shigeki Kakiuchi; Hideki Yamagishi; Emi Yamaguchi; Takashi Yoneda; Shogo Tomida

doi:10.4028/www.scientific.net/MSF.706-709.1973

Paper Titles

Study on Binder System for Micro Powder Injection Molding of ZrO₂ Ceramic
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Dynamic Molding of Powder Particles at Room Temperature
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Metal Injection Molding of Super Elastic Ti Alloy Materials
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Thermal Properties of Al/Diamond Composites Fabricated in Continuous Solid-Liquid Co-Existent State by SPS
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Surface Modification of Cobalt Chrome Molybdenum Cast Alloy by Electron Beam Irradiation
p.1973

Crack-Less Wafer-Level Packaging Using Flash Heating Technique for Micro Devices
p.1979

Multi-Functional Metal/Ceramic Hybrid Composites for Structural Applications
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Effects of Co Addition on Crystal Structure, Thermal Stability and Magnetic Properties of Ni-Mn-Ga Ferromagnetic Shape Memory Alloys from First-Principles Calculations
p.1990

Phase Transformation in Fe Alloys Induced by Surface Treatment
p.1996

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Surface Modification of Cobalt Chrome Molybdenum Cast Alloy by Electron Beam Irradiation

Abstract:

We irradiated the surface of a Co-Cr-Mo cast alloy plate with an electron beam in order to increase the surface hardness. An accelerating voltage of 40 kV and a current of 1~10 mA of the irradiated electron beam were used. The irradiation time for a single dot was 0.1 ms and the distance between dots (dot pitch) was 0.2 mm, corresponding to a scanning speed of 200 mm/s. A fine cellular structure was obtained by irradiating a low current electron beam. When a high current electron beam (more than 8 mA) was used for the irradiation, fine granular carbides were synthesized. The Vickers hardness of the base metal of 410 HV was increased to about 480~530 HV by the electron beam irradiation.