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钛合金具有许多十分有用的性能,如高比强 度,高耐腐蚀性等,但它的耐摩擦性能很差。可通过用氧扩 散以形成一表面硬化层来显著提高其耐摩擦性能。若再在 上面加上一层“金红石”型(TiO2)氧化层,就能生成高性能 齿轮所具有的抗磨损表面层。如今,这种氧扩散层可通过 在一真空中扩散后氧化而生成,而且需要第三步来生成表 面氧化物。此法虽可行,但处理过程复杂,成本昂贵且质量 控制困难。对不用昂贵的真空技术而以一步处理生成该复 式硬化表面的方法做了介绍。在大气压力下,用氩/氧混合 气体并很好地控制可生成所需的氧化层。
Titanium alloy has many very useful properties, such as high strength, high corrosion resistance, etc., but its poor wear resistance. The friction resistance can be significantly improved by diffusing oxygen to form a hardfacing layer. Adding a layer of “rutile” oxide (TiO2) on top of it creates an anti-wear surface layer for high-performance gears. Today, this oxygen diffusion layer can be generated by diffusing and then oxidizing in a vacuum, and a third step is needed to generate the surface oxide. This method is feasible, but the process is complex, costly and difficult to control quality. A step-by-step approach to creating the duplex hardened surface without expensive vacuum technology is presented. At atmospheric pressure, the argon / oxygen mixture is well controlled to produce the desired oxide.