低温等离子体氮化压力对304不锈钢摩擦性能的影响  

Effect of low temperature plasma nitriding pressure on tribological properties of 304 stainless steel

作　　者：徐林[1] 巴德纯[1] 王庆[1] 明悦[1] 郭德宇 

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》2014年第2期23-26,共4页Vacuum

摘　　要：采用低温等离子体氮化技术,对304奥氏体不锈钢进行表面氮化处理。运用XRD、SEM、金相技术和显微硬度计等分析手段对氮化层的物相组成及表面硬度进行分析及测量;利用球-盘摩擦实验在干摩擦条件下对氮化层的摩擦磨损性能进行测试并分析磨损机理。结果表明:304奥氏体不锈钢经低温等离子体氮化处理后,形成单一高氮面心立方相γN,显微硬度及耐磨损性能均明显提高,摩擦系数减小;氮化压力为10 Pa时,渗氮层具有最高的表面显微硬度850HV0.025及较好的耐摩擦磨损性能。AISI304 stainless steel was nitrided by low temperature plasma process at various working pressures . The phase composition and surface micro-hardness of nitride layer were respectively characterized by XRD , SEM , metalloscope and micro-hardness test . Friction and wear characteristics were investigated on a ball -on -disc testing machine under dry sliding conditions . The experimental results indicated that a single high nitrogen face-centered cubic phase （γN） is formed in the 304 stainless steel after low -temperature plasma nitrideing , surface properties including micro -hardness and dry -sliding are resistance were improved . The nitrided layer has the highest surface micro-hardness and better tribological properties under the pressure of 10 Pa .

关 键 词：304不锈钢 低温等离子体氮化 表面改性 摩擦性能 

分 类 号：TB43[一般工业技术] O484[理学—固体物理]