日本大阪府立产业技术综合研究所,采用放电加工方法,对钛进行表面改性,成功地使纯钛硬度提高10倍以上。该方法用放电加工液的热分解产生的碳,渗透到工件表面,使之生成碳化钛层。测定这种加工层的截面强度的结果表明,显示约HV2200的硬度,而母材纯钛材料的硬度 Osaka Prefecture, Japan Institute of Industrial Technology, the use of discharge processing methods, the titanium surface modification, the successful increase in the hardness of pure titanium more than 10 times. The method uses the carbon produced by thermal decomposition of the EDM to infiltrate the surface of the workpiece to form a titanium carbide layer. The results of measuring the cross-sectional strength of such a processed layer showed that the hardness of about HV2200 was shown, whereas the hardness of the base pure titanium material