大面積パルス電子ビーム照射によるチタン合金製生体部品の高能率表面仕上げ
2004 年 38 巻 89 号 p. 27-34
詳細
2004 年 38 巻 89 号 p. 27-34
A new surface finishing process for bio-titanium alloy products by wide-area electron beam (EB) irradiation is proposed. In the wide-area EB irradiation equipment, a high-energy-density EB can be irradiated without concentrating the beam. Therefore, a wide-area EB with a maximum diameter of 60mm can be used for instantaneously melting or evaporating a metal surface. Experimental results clarified that the surface roughness becomes smaller and the surface glossiness becomes higher with increasing energy density of the beam. Under an appropriate irradiation condition, the surface roughness of titanium alloy machined with an end mill could be decreased from 10μmRz to less than 1μmRz in 150 seconds. Moreover, the corrosion resistance and the repellency could be improved simultaneously. Therefore, the wide-area EB irradiation method may enable the highly efficient surface smoothing and surface modification of bio-titanium alloy.
