摘要
为了制备优质的电火花合金强化层,提高强化层摩擦学性能,本文运用电火花沉积工艺,制备了镍基合金强化层,研究了沉积工艺参数对镍基合金强化层摩擦学性能的影响规律。研究结果表明:电参数、比强化时间和氩气流量对镍基合金强化层摩擦学性能产生重要影响;采用低输出电压匹配较高充放电电容量(110 V、300μF)进行表面沉积,所制备的镍基合金强化层组织结构致密,耐磨性高;比强化时间为2.5 min/cm2时,保护气体氩气的流量应控制5 L/min左右,镍基合金强化层组织均匀致密,气孔率少,可降低摩擦系数,并显著提高强化层的耐磨损性能。镍基合金强化层的主要磨损机理是微观切削和微观断裂磨损。
In order to prepare high quality alloy strengthening coatings and improve their tribological properties, the Ni-base alloy strengthening coatings were prepared by electro-spark deposition. Influence of technological parameters on tribological properties of the Ni-base alloy coatings were studied in detail. The researched results show that the parameters such as electro-parameters, specific strengthening time and flux of argon gas have important effects on tribological properties of the Ni-base alloy coatings; the microstructure of Ni-base alloy strengthening coatings prepared by low value of output voltage （110 V） and relative big capacitance volume （300μF） is dense and have good property of wear resistance; the proper specific strengthening time of 2.5 min/cm2 and the argon gas flux of 5 L/min were adopted to prepare the Ni-base alloy coatings, which can result in dense and uniform microstructure, decrease friction coefficient.and increase wear resistance. The wear mechanisms of Ni-base alloy coatings are mainly micro-cutting and micro-fracture wear.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2009年第11期1469-1472,共4页
Acta Armamentarii
关键词
材料表面与界面
镍基合金
电火花沉积
强化层
工艺参数
摩擦学性能
surface and interface of materials
Ni-base alloy
electro-spark deposition
strengthening coating
technological parameter
tribological property
