医用锻造CoCrMo合金高温渗碳性能研究  

HIGH-TEMPERATURE CARBURIZATION PROPERTY OF MEDICAL GRADE FORGED CoCrMo ALLOY IN CH_4 GAS

作　　者：徐林[1] 巴德纯[1] 王庆[1] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《真空与低温》2014年第5期298-301,306,共5页Vacuum and Cryogenics

基　　金：沈阳市科技攻关计划项目:No.F12028200

摘　　要：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。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 compositionand 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 investigatedon a ball- on- disc testing machine under Tyrode’s solutions. The experimental analyses indicated that hard Cr3C2phase was formed on the carburized layer. Surface properties including micro-hardness and wetting properties as well aswear resistance of carburized medical grade forged CoCrMo alloys were improved compared to untreated sample.

关 键 词：医用锻造钴铬钼合金 高温渗碳 显微硬度 润湿性 摩擦性能 

分 类 号：TB43[一般工业技术]