CAJ | 학술논문

采用高温气体渗碳技术，对医用锻造钴铬钼合金进行表面渗碳处理。考察了高温渗碳行为对钴铬钼合金性能的影响。运用XRD、显微硬度计和光学动/静态接触角仪等分析手段对渗碳层的物相组成、表面硬度及润湿性能进行分析及测量；利用球-盘摩擦实验在Tyrode’s溶液润滑条件下对渗碳层的摩擦磨损性能进行测试。结果表明：医用锻造钴铬钼合金经高温渗碳处理后，形成致密的硬质化合物相Cr3C2，合金硬度较未处理试样明显升高，最高可达560 HV。与未处理合金试样相比，渗碳合金的亲水性及耐磨损性得到明显改善，耐磨损性提高近3倍。
채용고온기체삼탄기술，대의용단조고락목합금진행표면삼탄처리。고찰료고온삼탄행위대고락목합금성능적영향。운용XRD、현미경도계화광학동/정태접촉각의등분석수단대삼탄층적물상조성、표면경도급윤습성능진행분석급측량；이용구-반마찰실험재Tyrode’s용액윤활조건하대삼탄층적마찰마손성능진행측시。결과표명：의용단조고락목합금경고온삼탄처리후，형성치밀적경질화합물상Cr3C2，합금경도교미처리시양명현승고，최고가체560 HV。여미처리합금시양상비，삼탄합금적친수성급내마손성득도명현개선，내마손성제고근3배。
Medical grade forged CoCrMo alloys were carburized by the high-temperature gas carburizing process . The effect of high-temperature carburizing behavior on mechanical properties was investigated. The phase composition and surface micro-hardness as well as wettability of carburized layer were respectively studied by X-ray diffraction (XRD),micro-hardness test and optical dynamic/static contact angle meter. Friction and wear characteristics were investi-gated on a ball-on-disc testing machine under Tyrode’s solutions. The experimental analyses indicated that hard Cr3C2 phase was formed on the carburized layer. Surface properties including micro-hardness and wetting properties as well as wear resistance of carburized medical grade forged CoCrMo alloys were improved compared to untreated sample.