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论文类型：期刊论文

发表时间：2013-08-24

发表刊物：Applied Mechanics and Materials

收录刊物：EI、CPCI-S、SCIE、Scopus

卷号：423-426

页面范围：276-280

ISSN号：9783037858882

关键字：High current pulsed electron beam; 40CrNiMo7 steel; Microstructure; Microhardness; Wear resistance

摘要：High current pulsed electron beam (HCPEB) treatment was conducted on 40CrNiMo7 steel. The surface microstructure was characterized by metalloscopy and X-ray diffraction methods. The microhardness and wear resistance of modified surface were measured. After the HCPEB treatment, the surface crater structure was observed due to the inhomogeneity of initial material. A modified layer of depth similar to 7 mu m was formed with a hybrid microstructure composed mainly of martensite and a small quantity of austenite. The surface microhardness of HCPEB modified sample was increased drastically to more than 1000 HK. The wear resistance increased by about 36% as compared to the initial state.