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    • 31. 发明授权
    • Method of surface treatment of titanium metal
    • 钛金属表面处理方法
    • US07291229B2
    • 2007-11-06
    • US10659327
    • 2003-09-11
    • Eiichi IshiiTakumi SoneYukihiro SatoKei DemizuHideo KakutaniKoichi TanakaShinichi TanakaNoriyoshi Tsuji
    • Eiichi IshiiTakumi SoneYukihiro SatoKei DemizuHideo KakutaniKoichi TanakaShinichi TanakaNoriyoshi Tsuji
    • C23C8/20C23C8/36C22C14/00
    • C23C8/36
    • A method of carburizing treatment is proposed in which if carburizing is carried out at a low temperature, carbon will not turn amorphose and deposit on the surface of a titanium metal but reliably penetrate into between metallic atoms. It is a method of surface treatment of a titanium metal comprising the steps of heating the titanium metal to a temperature of 400-690° C. in a cleaning gas atmosphere containing hydrogen gas, subjecting the surface of the titanium metal to cleaning by applying a DC voltage of 200-1500 V, and plasma carburizing in an atmosphere comprising a carburizing gas having an atomic weight ratio of hydrogen atoms (H) to carbon atoms (C) adjusted to 1≦H/C≦9 at a pressure of 13-400 Pa and a temperature of 400-690° C. Ionization reaction in the gas is suppressed suitably. Because there exists no excessive carbon which is not used for carburization but turns soot or glass-like carbon, in the atmosphere during carburization, carburizing reaction progresses smoothly.
    • 提出了一种渗碳处理方法,其中如果在低温下进行渗碳,则碳不会变形并沉积在钛金属的表面上,而是可靠地渗入金属原子之间。 它是钛金属的表面处理方法,包括以下步骤:在含有氢气的清洁气体气氛中将钛金属加热到400-690℃的温度,通过施加钛金属来清洁钛金属表面 DC电压为200-1500V,并且在包含在氢气压力下调节至1 <= H / C <= 9的原子比为氢原子(H)与碳原子(C)的原子比的渗碳气体的气氛中的等离子体渗碳 13-400Pa,温度400-690℃。适当地抑制气体中的离子化反应。 由于不存在不用于渗碳而变成烟灰或玻璃状碳的过量碳,在渗碳时的气氛中,渗碳反应平稳进行。