【作者】 吴爱民； 刘捍卫； 邹建新； 周仲荣； 董闯；

【Author】 Aimin WU, Hanwei LIU, Jianxin ZOU, Zhongrong ZHOU, Chuang DONGState Key Lab. for Materials Modification by Laser, Ion and Electron Beams, Department of Material Science andEngineering, Dalian University of Technology, Dalian 116024, Tribology Research Institute, Southwest Jiaotong University, Chengdu 610031

【机构】 大连理工大学三束材料改性国家重点实验室； 西南交通大学摩擦学研究所；

【摘要】 本文利用强流脉冲电子束(HCPEB)技术对D2钢进行表面改性处理,结果表明,电子束轰击试样近表层组织结构发生了很大变化,且亚表层显微硬度明显增加。微动磨损结果表明,电子束处理可以改善D2钢抗微动磨损性能,预涂覆TiN和Cr层效果更明显。磨痕SEM分析表明,涂覆Cr层的样品微动磨损主要机制是粘着和氧化,而TiN涂层及电子束直接处理试样主要磨损机制则是表面疲劳微裂纹的扩展和断裂产生的剥落颗粒,在摩擦面造成磨粒磨损,同时也伴随轻微的粘着和氧化,其磨损机制相对比较复杂。更多还原

【Abstract】 This paper studied the effect of high current pulsed electron beam (HCPEB) treatment on fretting wear ability of D2 die steel. It is shown that the most pronounced structural changes occur in the near-surface region, where the energy deposition is at its maximum. The fretting tests under dry condition were carried out on both treated and untreated specimens. The HCPEB treatment increases the fretting wear resistance significantly, and the improvement is further enhanced by surface pre-alloying by TiN and Cr. SEM analysis of the wear scars showed that the fretting wear mechanism of Cr coating is adhesive and oxidation wear, That of the TiN coating and non-coating D2 die steel is particle detachment through the propagation and fracture of fatigue microcracks on surface, and slight adhesive and oxidation wear been found, its wear mechanism is more complex.更多还原