【作者】 夏伯才； 赵建华； 钱翰城；

【Author】 XIA Bo-cai1,ZHAO Jian-hua2,QIAN Han-cheng2(1.Institute of Technology,CAEP,Mianyang,Sichuan,621900,China;2.School of Material Science and Engineering,Chongqing University,Chongqing,400044,China)

【机构】 中国工程物理研究院工学院； 重庆大学材料科学与工程学院；

【摘要】 电火花微弧堆焊在电极与金属母材间瞬时高频释放电源存储的高能量电能,在母材表面产生瞬间高温、高压微区;同时,在微电场的作用下,离子态的电极材料熔敷到基体上,高温快速凝固,形成冶金结合堆焊层。其本质是电极材料与基体金属表面之间的一种微焊过程。该技术具有设备简单、操作方便、堆焊层结合力强、材料种类广泛的特点。本文介绍了电火花微弧堆焊的技术原理、设备与焊材、工艺和修复应用现状。更多还原

【Abstract】 Developed from electrospark deposition(ESD),electrospark micro-bonding surfacing process is a micro-bonding process that is capable of depositing wear and corrosion resistance coating to repair,to improve and to extend the service life of the components and tools.During the coating process,short duration of electrical pulses ranging from a few microseconds to milliseconds are used to deposit the electrode material to the component’s surface producing a protective layer.The low net heat input and the ability to form metallurgical bonding of coating to substrate are some of the noticeable advantages of ESD coating process.This paper presents the current understanding of the ESD process,of equipments,of the influence of major process parameters on the resulting coating and of the bond between the electrode and the substrate,of current applications in casting repairs.更多还原