1Cr13不锈钢部分滑移区和滑移区的高温微动磨损特性

Fretting Behaviour of 1Cr13 Stainless Steel from Room Temperature to 400℃ in Gross Slip Regime and Slip

采用Deltalab-Nene7型电液伺服式高温微动磨损试验机,研究了核反应堆蒸汽发生器管支撑部件材料1Cr13不锈钢从室温到400oC的微动磨损行为。通过动力学特性分析,结合显微观测,结果发现:1Cr13不锈钢的高温微动行为与微动区域特性密切相关。在滑移区内,随着温度的升高,摩擦系数与磨损降低。微动磨损机理为氧化与剥层:高温氧化效应以及氧化膜的形成随温度的升高而加剧。在微动工况下,氧化膜萌生裂纹,裂纹扩展折向表面,直至氧化膜剥落,形成磨屑。然而,在部分滑移区内,温度对微动行为影响很小。

Fretting wear behaviour of the 1Cr13 stainless steel from room temperature to 400℃ were investigated on a Deltalab-Nene7 fretting wear test rig. Dynamic analysis and microscopic examinations have shown that the fretting behavior depended strongly on the fretting regime. Coefficient of friction and wear volume reduced as the increasing of temperature in slip regime, and little difference was observed in partial slip regime. The fretting wear mechanism is analyzed： As the temperature increases, an oxide film forming on the surface of 1Cr13 stainless steel for the high temperature oxidizing. The crack on oxide film generates and fractures under the effect of fretting, and the crack propagates parallel to the surface. The wear debris is detached from the substrate by the repeated stress action.