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首页> 外文期刊>Journal of Tribology >Transition of Wear Mechanisms of Plasma Source Nitrided AISI 316 Austenitic Stainless Steel Against Ceramic Counterface
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Transition of Wear Mechanisms of Plasma Source Nitrided AISI 316 Austenitic Stainless Steel Against Ceramic Counterface

机译：等离子源渗氮AISI 316奥氏体不锈钢对陶瓷端面的磨损机理的转变

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摘要

A single high-nitrogen face-centered-cubic (f.c.c.) phase (γ_N) layer formed on the plasma source nitrided AISI 316 austenitic stainless steel at a nitriding temperature of 450℃ for a nitriding time of 6 h. An approximately 17 μm-thick γ_N layer has a peak nitrogen concentration of about 20 at.%. Tribological properties of the γ_N phase layer on a ball-on-disk tribometer against an Si_3N_4 ceramic counterface under a normal load of 2 and 6 N with a sliding speed of 0.15 to 0.29 m/s were investigated by friction coefficient and specific wear rate measurement. Worn surface morphology and wear debris were characterized using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. The microhardness of the γ_N phase layer on the nitrided stainless steel was measured as about 15.1 GPa. The change in the friction coefficient of the γ_N phase layer on the stainless steel was dependent on the applied normal load, which was associated with that in the specific wear rate. Under a lower normal load of 2 N, the lower specific wear rate of the γ_N phase layer with a sliding speed of 0.15 m/s was obtained as 2.8 × 10~(-6) mm~3/N m with a friction coefficient of 0.60. Under a higher normal load of 6 N, the lower specific wear rate with a sliding speed of 0.29 m/s was 7.9 × 10~(-6) mm~3/N m with a friction coefficient of 0.80. When the applied load increased from 2 to 6 N, a transition of the wear mechanisms from oxidative to abrasive wear was found, which was derived from the oxidation reaction and the h.c.p. martensite phase transformation of the γ_N phase during the wear tests, respectively.
机译：在450℃的氮化温度下，经过6 h的氮化时间，在等离子源氮化的AISI 316奥氏体不锈钢上形成了一个高氮面心立方（f.c.c.）相（γ_N）层。厚度约为17μm的γ_N层的峰值氮浓度约为20 at。％。通过摩擦系数和比磨损率测量研究了圆盘摩擦计上的γ_N相层在2和6 N的正常载荷下，滑动速度为0.15至0.29 m / s时相对于Si_3N_4陶瓷对接面的摩擦学性能。 。分别使用扫描电子显微镜（SEM）和透射电子显微镜（TEM）表征磨损的表面形态和磨损碎片。氮化不锈钢上的γ_N相层的显微硬度测得约为15.1 GPa。 γ_N相层在不锈钢上的摩擦系数的变化取决于所施加的法向载荷，该载荷与特定磨损率相关。在2 N的较低法向载荷下，滑动速度为0.15 m / s的γ_N相层的比磨损率较低，为2.8×10〜（-6）mm〜3 / N m，摩擦系数为0.60。在较高的6 N正常载荷下，滑动速度为0.29 m / s时较低的比磨损率为7.9×10〜（-6）mm〜3 / N m，摩擦系数为0.80。当施加的载荷从2 N增加到6 N时，发现了磨损机理从氧化磨损到磨料磨损的转变，这是由氧化反应和h.c.p.引起的。磨损试验中γ_N相的马氏体相变。

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