碳化?氮化与碳氮化对316LVM不锈钢微动腐蚀磨损性能的影响
Effect of Surface Treatment on the Fretting Wear Behavior of Medical Grade Austenitic Stainless Steels
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摘要: 采用液压伺服微动试验机,在模拟体液中试验研究了430℃渗氮?430℃氮碳共渗与500℃渗碳等3种表面改性工艺对医用奥氏体不锈钢316LVM微动腐蚀磨损性能的影响.结果表明,3种工艺均可在奥氏体不锈钢表面形成扩展奥氏体相“S相”,明显地提高基体硬度和弹性模量,进而改善其微动腐蚀磨损性能.在本文试验条件下,430℃氮碳共渗样品的耐微动腐蚀磨损性能最好,是医用奥氏体不锈钢316LVM抗微动磨损性能最优的表面改性工艺.Abstract: The effect of the surface treatment on the fretting wear behavior of 316LVM austenitic stain less steel was investigated in the Ringer′s solution by a Servo Hydraulic Dynamic Test machine. Three kinds of surface treatments Were used in the experiments, namely low-temperature plasma nitriding at 430℃,carbonitriding at 430℃,and carburizing at 500℃, respectively. The experimental results indicated that all the three treatments created a layer Of “S” phase on the sample surface, which effectively improved the hardness and elastic modulus of 316LVM and further enhanced its anti-corrosion and anti-wear properties. The 316LVMnitridedat430℃ showed the similar Friction behavior as that carbonitrided at 430℃.Even the 316LVM carburized at 500℃ exhibited the lowest Friction coefficient; the low-temperature plasma carbonitrided at 430℃ was the best surface treatment of three Against the fretting wear of medical grade316LVM austenitic stainless steels in this experiment