摘要
利用强流脉冲电子束对调质钢（40Cr）进行表面处理，分析处理后试样表面形貌、组织结构以及截面显微硬度。研究表明：40Cr钢经电子束处理后，近表层晶粒明显细化，分布着细小针状组织，表层熔化厚度约为2～3gm。表层几百微米显微硬度明显增加，8次和25次轰击后，峰值硬度在次表层约80um处，增幅达50％左右，硬度影响深度分别为750gm和1500gm。
The surface modification of gear steel （40Cr） by high current pulsed electron beam （HCPEB）. The surface morphology and properties were characterized with optical microscopy, scanning electron microscopy（SEM） and micro-Vikers hardness testing machine. The results show that the grain refinement of 40Cr steel near the surface and distributes the acicular constituent. The thickness of melted layer attained 2-3 um. Elevation of hardness in the range of several hundreds micrometers near the treated surface was found for the samples. For the 40Cr samples treated with 8 and 25 pluses, the peak value microhardness was found at 80 um below the surface and increased 50 %. The hardness affect zone attained 750 um and 1 500 um, respectively.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2009年第5期70-74,共5页
China Surface Engineering
基金
国家自然科学基金资助项目(50775229)
重庆市自然科学基金资助项目(NO.2008BA3014)
